CN211183456U

CN211183456U - Novel short-circuit-proof electronic fuse

Info

Publication number: CN211183456U
Application number: CN201922120925.0U
Authority: CN
Inventors: 陆晶
Original assignee: Shenzhen Domore Technology Co ltd
Current assignee: Shenzhen Domore Technology Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-08-04
Anticipated expiration: 2029-12-02

Abstract

The utility model discloses a novel prevent short circuit electronic fuse. The emergency power supply comprises an input end used for accessing the electric energy of an emergency power supply battery, a field effect tube on-off module used for controlling the on-off of the whole power supply, a current detection circuit used for detecting current parameters in the circuit, a control circuit used for receiving the current detection parameters and arranging and feeding back the current detection parameters to the field effect tube on-off module, and an output end used for outputting the power supply. The utility model adopts the current and temperature parameters as the basis to judge the short circuit and the reverse connection, further controls the on-off of the field effect tube on-off module, further realizes the double circuit protection function, and has the functions of short circuit prevention and reverse connection prevention; meanwhile, the whole body is composed of electronic components, so that the design of a chip or an MCU is omitted, and the production cost is greatly reduced.

Description

Novel short-circuit-proof electronic fuse

Technical Field

The utility model belongs to the technical field of battery drive safety protection apparatus technique and specifically relates to a novel prevent short circuit electronic fuse.

Background

As is well known, when an automobile (or a motorcycle, a ship, etc.) is started, a power supply provided by a battery pack of the automobile needs to be used for ignition to start an engine, so that once the electric energy consumption of the battery pack of the automobile reaches a certain level and the output voltage of the battery pack is low, the battery pack of the automobile cannot provide enough voltage to realize ignition, and the automobile cannot be started. Generally, if the voltage of the battery pack of the automobile is low, the battery pack can be replaced to normally start the automobile, but in actual life, a driver cannot necessarily find the replaceable battery pack in time when the voltage of the battery pack is low, so people usually have an emergency standby power supply on the automobile for temporarily igniting to start the automobile.

For emergency back-up power, it is a portable power source, including a small battery pack. When using emergency power supply, need use the ignition line connector that has the storage battery clamp to connect stand-by power supply and car group battery to use storage battery clamp centre gripping on the anodal of car group battery and negative pole, supply power to car group battery through emergency power supply's group battery. Because the group battery of car includes anodal and negative pole, consequently need use two battery clamps to centre gripping respectively on anodal and negative pole, in order to distinguish the battery clamp of centre gripping at battery positive pole and negative pole, two battery clamp outsourcing have the insulating cement of different colours, the battery clamp centre gripping of parcel red insulating cement is at the anodal of car group battery, the battery clamp centre gripping of parcel black insulating cement is at the negative pole of car group battery.

However, when people use emergency backup power, the following problems often occur: firstly, most automobile drivers are unfamiliar with the automobile structure, the use of all electric appliances in daily life is not distinguished by positive and negative electrodes, the problems can be ignored when the drivers start the automobile, once an emergency standby power supply is reversely connected with the positive and negative electrodes of an automobile battery pack, a large amount of sparks can be emitted within one second, the battery pack is expanded within two seconds, smoke and even explosion occur, and personal and property safety of users is seriously damaged.

Disclosure of Invention

To the not enough of existence among the above-mentioned prior art, the utility model aims to provide a novel prevent short circuit electronic fuse.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a novel short-circuit-proof electronic fuse comprises an input end used for accessing the electric energy of an emergency power supply battery, a field effect tube on-off module used for controlling the on-off of the whole power supply, a current detection circuit used for detecting current parameters in the circuit, a control circuit used for receiving the current detection parameters and arranging the current detection parameters and feeding the current detection parameters back to the field effect tube on-off module, and an output end used for outputting the power supply;

the field-effect tube on-off module comprises at least one field-effect tube, the field-effect tube on-off module is connected with the control circuit and is connected with the negative electrode of the output end, and the current detection circuit is connected with the control circuit and is connected with the negative electrode of the output end.

Preferably, the control circuit is further connected with a temperature detection circuit.

Preferably, the field effect transistor on-off module is also connected with an L ED indicator light.

Preferably, the control circuit comprises a voltage comparator, and the input end of the voltage comparator is respectively connected with the current detection circuit and the temperature detection circuit.

Preferably, the output end is a battery chuck.

By adopting the scheme, the utility model adopts the current and temperature parameters as the basis to carry out short circuit and reverse connection judgment, further controls the on-off of the field effect tube on-off module, further realizes the double circuit protection function, and has the functions of short circuit prevention and reverse connection prevention; meanwhile, the whole body is composed of electronic components, so that the design of a chip or an MCU is omitted, and the production cost is greatly reduced.

Drawings

Fig. 1 is a schematic diagram of the structural principle of the embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an overall circuit according to an embodiment of the present invention.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1 and fig. 2, the novel short-circuit prevention electronic fuse provided in this embodiment includes an input terminal for accessing the electric energy of an emergency power supply battery, a field-effect tube on-off module for controlling the on-off of the whole power supply, a current detection circuit for detecting current parameters in the circuit, a control circuit for receiving the current detection parameters and feeding the current detection parameters back to the field-effect tube on-off module, and an output terminal for outputting the power supply;

Further, the control circuit is also connected with a temperature detection circuit.

Further, the field effect tube on-off module is also connected with an L ED indicator light.

Further, the control circuit comprises a voltage comparator, and the input end of the voltage comparator is respectively connected with the current detection circuit and the temperature detection circuit.

Furthermore, the output end is a battery jar chuck.

The specific circuit of this embodiment is shown in fig. 2, and the circuit operation principle is as follows:

the emergency power supply battery power that the input end inserts is born by the field effect transistor break-make module, the field effect transistor break-make module comprises MOS pipe Q2, Q3 (it should be noted, according to the difference of voltage, electric current size, its MOS pipe can be increased or decreased in number, this embodiment explains with two as the example specially), MOS pipe Q2, Q3 are high-power heavy current MOS pipes, the control circuit mainly comprises voltage comparator U1, controller Q1, wherein resistance R3, R8 make up the current detection circuit, the signal that resistance R3, R8 detected is judged by voltage comparator U1 and reference source D3, if exceed the specified value, output signal by voltage comparator U1, through controller Q1 shutoff MOS pipe Q2, Q3. The resistor R7 is a thermistor, forms a temperature detection circuit, judges whether the specified value is exceeded or not according to the change of the heating resistance value of the resistor R7, and once the specified value is exceeded, the voltage comparator U1 outputs signals, and the MOS transistors Q2 and Q3 are turned off through the controller Q1. Thereby realizing double protection.

And the light emitting diode L ED1 in the circuit is a L ED indicator light, and when the controller Q1 turns off the MOS tubes Q2 and Q3, a signal indication is given.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a novel prevent short circuit electronic fuse which characterized in that: the emergency power supply comprises an input end used for accessing the electric energy of an emergency power supply battery, a field effect tube on-off module used for controlling the on-off of the whole power supply, a current detection circuit used for detecting current parameters in the circuit, a control circuit used for receiving the current detection parameters and arranging and feeding back the current detection parameters to the field effect tube on-off module, and an output end used for outputting the power supply;

the field effect tube on-off module comprises at least one field effect tube, the field effect tube on-off module is connected with a control circuit and is connected with the negative electrode of the output end, the current detection circuit is connected with the control circuit and is connected with the negative electrode of the output end, the control circuit is further connected with a temperature detection circuit, the field effect tube on-off module is further connected with L ED indicator lamps, the control circuit comprises a voltage comparator, and the input end of the voltage comparator is respectively connected with the current detection circuit and the temperature detection circuit.

2. A novel short-circuit prevention electronic fuse as claimed in claim 1, wherein: the output end is a battery chuck.