CN210183023U

CN210183023U - Charging device

Info

Publication number: CN210183023U
Application number: CN201920573522.9U
Authority: CN
Inventors: 孙中伟; 黄少葵
Original assignee: Shenzhen Hello Tech Energy Co Ltd
Current assignee: Shenzhen Hello Tech Energy Co Ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-03-24
Anticipated expiration: 2029-04-23

Abstract

The utility model discloses a charging device, the charging device is used for charging the automobile storage battery or the vehicle-mounted equipment, the charging device comprises a power module, a main control circuit, a lifting circuit, an adjusting circuit and an output port, and the charging device charges the automobile storage battery or the vehicle-mounted equipment through the output port; the power supply module is respectively electrically connected to the main control circuit and the lifting circuit and used for providing electric energy for the main control circuit and the lifting circuit; the main control circuit is also electrically connected with the adjusting circuit and the lifting circuit; the main control circuit is used for outputting an adjusting signal to the adjusting circuit, and the adjusting circuit controls the lifting circuit to output a first output voltage or a second output voltage to the output port according to the adjusting signal, wherein the second output voltage is higher than the first output voltage. The utility model provides a multiple charging voltage, and can satisfy the demand of charging of car storage battery simultaneously.

Description

Charging device

Technical Field

The utility model relates to the field of electronic technology, especially, relate to a charging device.

Background

At present, automobiles are popularized to various households, and even if gasoline is used as an energy automobile, the existing automobiles still need storage batteries. When the automobile is ignited and started, power is supplied to a starting system of the automobile. The power supply of the automobile starter, the ignition of a spark plug, the operation of a gasoline pump, an electronic fuel injection system and other equipment need to be supplied with power by a battery during the ignition and starting of the engine. The existing storage battery is generally a lead-acid storage battery. The capacity of a lead-acid storage battery is large and is generally over 35Ah, but the existing emergency battery is required to charge vehicle-mounted equipment while the automobile storage battery is charged, and only one output voltage meeting the requirement of the vehicle-mounted equipment is generally provided. However, the output voltage of the vehicle-mounted equipment is too low for the output voltage of the lead-acid storage battery, so that the automobile battery cannot be rapidly charged to a starting state from a power-shortage state, and emergency charging is realized.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a charging device which can change the output voltage according to the charging object, the following technical scheme is adopted to realize:

a charging device is used for charging an automobile storage battery or vehicle-mounted equipment, and comprises a power supply module, a main control circuit, a lifting circuit, an adjusting circuit and an output port, wherein the charging device charges the automobile storage battery or the vehicle-mounted equipment through the output port; the power supply module is respectively electrically connected to the main control circuit and the lifting circuit and used for providing electric energy for the main control circuit and the lifting circuit; the main control circuit is also electrically connected with the adjusting circuit and the lifting circuit; the main control circuit is used for outputting an adjusting signal to the adjusting circuit, and the adjusting circuit controls the lifting circuit to output a first output voltage or a second output voltage to the output port according to the adjusting signal, wherein the second output voltage is higher than the first output voltage.

Furthermore, the charging device also comprises a detection circuit, the detection circuit is electrically connected with the main control circuit, and the detection circuit is used for detecting whether the output port is connected with an automobile battery; when the input port is connected to an automobile battery, the detection circuit generates a detection signal; when the main control circuit detects the detection signal, the main control circuit sends a first adjusting signal to the adjusting circuit, and the adjusting circuit controls the lifting circuit to output a second output voltage according to the first adjusting signal.

Furthermore, the detection circuit comprises a first detection resistor, a second detection resistor and a detection node electrically connected between the first detection resistor and the second detection resistor, the detection node is electrically connected to the main control circuit, the first detection resistor is electrically connected with the output port, the second detection resistor is grounded, and the main control circuit is further used for detecting whether the detection point generates the detection signal when the lifting circuit is closed.

Furthermore, the charging device further comprises a mode selection key, the mode selection key is used for a user to select a charging mode of the charging device, the charging mode comprises an automatic adjusting mode and a quick adjusting mode, and when the user selects the quick adjusting mode, the main control circuit sends the first adjusting signal to the adjusting circuit.

Further, when the user selects the auto-adjustment mode, the control circuit turns off the lift circuit only in the auto-adjustment mode.

Further, the adjusting signal includes a first adjusting signal, the adjusting circuit includes an electronic switch, a first feedback resistor, a second feedback resistor, a third feedback resistor, and a feedback node, the feedback node is electrically connected between the first feedback resistor and the second feedback resistor, the electronic switch is electrically connected between the third feedback resistor and the main control circuit, one end of the first feedback resistor, which is not connected to the feedback node, is electrically connected to the output port, the other end of the second feedback resistor, which is not connected to the first feedback resistor, is grounded, one end of the third feedback resistor is electrically connected to the feedback node, and the other end of the third feedback resistor is electrically connected to the electronic switch; the lifting circuit is also electrically connected to the feedback node, and when the main control circuit outputs the first adjusting signal, the electronic switch is closed; when the main control circuit outputs the second adjusting signal, the electronic switch is switched off.

Furthermore, the electronic switch is a field effect transistor, a gate of the field effect transistor is electrically connected with the first lead of the main control circuit, a drain of the field effect transistor is electrically connected with one end of the third feedback resistor, and a source of the field effect transistor is grounded.

Further, the lifting circuit is used for detecting the voltage of the feedback node and boosting or reducing the voltage according to the voltage of the feedback node.

The charging device further comprises a power line, one end of the power line is provided with a cigarette lighter type plug electrically connected with the output port, the cigarette lighter type plug is provided with a protruding positive contact and a protruding negative contact, and the protruding positive contact and the protruding negative contact are clamped with a positive electrode and a negative electrode in the output port to stabilize the electrical connection between the cigarette lighter type plug and the output port; the other end of the power line is provided with an alligator clip for connecting with an automobile storage battery or vehicle-mounted equipment to transmit electric energy.

Furthermore, the master control circuit is further connected with a temperature detection circuit, the temperature detection circuit comprises a thermistor, and two ends of the thermistor are respectively connected with the master control circuit and the ground.

Compared with the prior art, the beneficial effects of the utility model reside in that: a plurality of charging voltages are provided, and the vehicle-mounted equipment and the automobile storage battery can be charged. And whether can automated inspection battery charging outfit be the car storage battery, the corresponding voltage of automatic selection charges. Meanwhile, the temperature detection module is arranged, so that the power utilization safety is ensured.

Drawings

Fig. 1 is a schematic structural view of the charging device of the present invention;

fig. 2 is a schematic diagram of a circuit connection of a charging device according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a connection of a main control circuit of a charging device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a power line according to an embodiment of the present invention.

In the figure: 10. a power supply module; 20. a lifting circuit; 30. a master control circuit; 40. a regulating circuit; 50. a detection circuit; 60. an output port; 301. a temperature detection circuit; 401. a feedback node; 501. detecting a node; 601. a metal spring sheet; 70. a power line; 710. a cigarette lighter type plug; 711. a positive electrode contact; 712. a negative contact; 72. the crocodile clip.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

The utility model provides a charging device for charge for car storage battery or mobile unit. The charging device is provided with a power supply for storing electric energy to provide electric energy for the automobile storage battery. The charging device comprises a main control circuit and a detection circuit, the detection circuit detects the judgment of external charging equipment, and the main control circuit controls the adjusting circuit to switch to a proper output voltage, so that the charging time is shortened, and the automobile storage battery can recover to a working state as soon as possible.

Please refer to fig. 1, fig. 1 is a schematic structural diagram of a charging device according to an embodiment of the present invention, which includes a power module 10 for storing electric energy, a main control circuit 30, a lifting circuit 20, an adjusting circuit 40, and an output port 60, wherein the charging device is fixedly connected to a charging output port of a vehicle battery or a vehicle-mounted device through the output port 60, and outputs a voltage to the vehicle battery or the vehicle-mounted device for charging. The power module 10 is electrically connected to the main control circuit 30 and the lifting circuit 20, and is configured to provide electric energy for the main control circuit 30 and the lifting circuit 20, and meanwhile, the lifting circuit 20 is configured to boost or step down the voltage provided by the power module 10 and output the boosted or stepped-down voltage to the output port 60, and the main control circuit 30 is further electrically connected to the adjusting circuit 40 and the lifting circuit 20; the main control circuit 30 is configured to output a regulation signal to the regulating circuit 40, and the regulating circuit 40 controls the lifting circuit 20 to output a first output voltage or a second output voltage to the output port 40 according to the regulation signal, where the second output voltage is higher than the first output voltage. The first output voltage is the voltage required by charging of the vehicle-mounted equipment, and the second output voltage is the voltage required by charging of the automobile storage battery. Specifically, the first output voltage is 12V, and the second output voltage is 14.5V. Specifically, the power module 10 is a lithium battery or other type of battery module.

Preferably, the charging device further includes a detection circuit 50, and the detection circuit 50 is electrically connected to the main control circuit 30 and the output port 60. The detection circuit 50 is used for detecting whether the output port 60 is connected with an automobile battery so as to select to output the first output voltage or the second output voltage. When the input port 60 is connected to the automobile battery, the detection circuit 50 generates a detection signal. When the main control circuit 30 detects the detection signal, the main control circuit sends a first adjustment signal to the adjustment circuit 40, and the adjustment circuit 40 controls the lifting circuit 20 to output a second output voltage according to the first adjustment signal.

Referring to fig. 2 to 3, fig. 2 is a circuit connection diagram of a charging device, and fig. 3 is a connection diagram of a main control circuit 30 according to the present embodiment.

Preferably, the detection circuit 50 includes a first detection resistor R32 and a second detection resistor R35, and a detection node 501 electrically connected between the first detection resistor R32 and the second detection resistor R35. The detection node is electrically connected to the main control circuit 30. One end of the first detecting resistor R32 is electrically connected to the output port 60, and the other end of the second detecting resistor R35, which is not electrically connected to the first detecting resistor R32, is grounded. The main control circuit 30 is further configured to detect whether the detection node 501 generates a detection signal when the lifting circuit 20 is turned off, so as to detect whether the output port 60 is electrically connected to the automobile battery.

In one embodiment, the adjustment signal includes a first adjustment signal and a second adjustment signal, and the charging device further includes a mode key selection button S1, the key selection button S1 being electrically connected to the main control circuit 30. The key selection button S1 allows the user to select a charging mode of the charging device, which includes an auto-adjustment mode and a shortcut mode. When the user selects the shortcut adjustment mode, the main control circuit 30 sends the first adjustment signal to the adjustment circuit 40. And the main control circuit closes the lifting circuit only in the automatic adjusting mode.

The regulating circuit 40 includes an electronic switch Q12, a first feedback resistor R15, a second feedback resistor R18, a third feedback resistor R28, and a feedback node 401. The feedback node 401 is electrically connected between the first feedback resistor R15 and the second feedback resistor R18, and the electronic switch Q12 is electrically connected between the third feedback resistor R28 and the main control circuit 30. The end of the first feedback resistor R15 not connected to the feedback node 401 is connected to the output port 60, and the end of the second feedback resistor R18 not connected to the feedback node 401 is grounded. One end of the third feedback resistor R28 is connected to the feedback node 401, and the other end of the third feedback resistor R28 is connected to the electronic switch Q12. The lifting circuit 20 is further electrically connected to the feedback node 401, and when the main control circuit 30 outputs the first adjustment signal, the electronic switch is turned on; when the master control circuit outputs the second adjustment signal, the electronic switch Q12 is turned off. Preferably, the electronic switch Q12 is a field effect transistor, a gate of the field effect transistor is electrically connected to the pin 10 of the main control circuit 30, a drain of the field effect transistor Q12 is electrically connected to one end of the third feedback resistor R28, and a source of the field effect transistor Q12 is grounded.

In one embodiment, the buck-boost circuit 20 senses the voltage at the feedback node 401 and boosts or drops the voltage according to the voltage at the feedback node 401. Specifically, the lifting circuit 20 of the present embodiment includes a PWM power controller U1, and after the voltage at the output port 60 is sampled by the regulating circuit 40, the voltage is fed back to the FBI port of the PWM power controller U1 through the feedback node 401, and the PWM power controller U1 controls the output voltage in the lifting circuit 20. The PWM power controller U1 of the elevator circuit 20 detects the voltage value of the feedback node 401, obtains the sampling conditions of the first feedback resistor R15 and the second feedback resistor R18, calculates whether the voltage of the feedback node 401 reaches a preset voltage, and if the voltage of the feedback node 401 reaches the preset voltage, the elevator circuit 20 keeps the current output voltage and continuously outputs the voltage to the output port 60. It can be understood that when the main control circuit 30 sends the first adjustment signal to the fet Q12, the third feedback resistor R28 is controlled to be grounded and connected in parallel with the second feedback resistor R18, the third feedback resistor R28 is connected in parallel with the second feedback resistor R18 to reduce the voltage division, the lifting circuit 20 detects that the voltage value of the feedback node 401 does not reach the preset voltage, and the lifting circuit 20 adjusts the signal to adjust the voltage of the feedback node 401 until the voltage of the feedback node 401 reaches the preset voltage. The feedback node 401 reaches a predetermined voltage, and the voltage at the output port 60 also reaches a second output voltage value.

Specifically, when the user selects the automatic adjustment mode, the lifting circuit 20 adjusts the output voltage of the power module 10 to the first output voltage, when the lifting circuit 20 detects that the output voltage reaches the first output voltage, the output current slowly decreases, the output voltage is turned off and delayed for several seconds, the detection circuit 50 detects whether the output port 60 has voltage, if yes, it indicates that the output port 60 is connected with the automobile battery, a detection signal is generated and sent to the main control circuit 30, the main control circuit 30 outputs the first adjustment signal, the field effect transistor Q12 is turned on, so that the third feedback resistor R28 is turned on with the ground and connected in parallel with the second feedback resistor R18, and when the lifting circuit 20 detects a sampling change, the voltage is adjusted and the second output voltage is output. When the user selects the shortcut mode, the main control circuit 30 directly sends the first adjustment signal to the adjustment circuit 40, so that the lifting circuit 20 continuously outputs the second output voltage. When the user selects the auto-adjustment mode, the main control circuit 30 turns off the lifting circuit 20 only in the auto-adjustment mode.

In one embodiment, the charging device further includes a temperature detection circuit, the temperature detection circuit is electrically connected to the main control unit 30, the temperature detection circuit includes a thermistor R12, and is connected to the pin 2 of the control unit 30, when the charging temperature is detected to be too high, the control unit 30 sends an electric signal to the lifting circuit 20 in time, stops outputting the electric power, and ensures the safety of electricity utilization.

In one embodiment, the master control circuit 30 includes a control chip. Pin 1 and pin 3 of the control chip of the main control circuit 30 are electrically connected to pin DIR and pin CE of the PWM power controller U1, respectively. Specifically, the main control circuit 30 detects that the key selection button S1 is triggered to enter the automatic adjustment mode once, and the main control circuit 30 sends an electrical signal to start the PWM power controller U1: the signal sent by the pin 3 to the CE is a low level signal, the signal sent by the pin 1 to the DIR is a high level signal, the PWM power supply controller U1 receives the signal, the lifting circuit 20 starts to boost the voltage output by the power supply module 10, and the detection circuit 50 detects the output voltage. When the output voltage is lower than 12V, the output current is in a constant current state under the action of the lifting circuit 20, the output voltage slowly rises, when the voltage approaches 12V, the output current slowly falls, when the detection circuit 50 detects that the output voltage reaches 12V, the output current starts to fall, the output voltage is closed, delay is delayed for several seconds, the detection circuit 50 detects that the voltage exists in the output port 60, it indicates that the charging object is an automobile battery, the main control circuit 30 provides 5V high-level voltage for the field-effect transistor Q12, so that the third feedback resistor R28 is grounded, and the output voltage continuously rises to 14.5V. If the voltage is not detected, the charging voltage requirement of the charging object is met, and the voltage rise is stopped. In some embodiments, the pin 20 of the main control circuit 30 is electrically connected to the pin 11 of the PWM power controller U1 to detect whether the output current is constant and perform overcurrent protection in time when the current is too large. When the main control circuit 30 detects that the key selection button S1 triggers the start shortcut mode, the main control circuit 30 sends an electrical signal to start the lifting circuit 20, and simultaneously sends a first adjustment signal to the field effect transistor Q12 to control the lifting circuit 20 to output 14.5V output voltage. Compared with an automatic regulation mode, the voltage output in the shortcut mode is more stable, and the charging is faster. The main control circuit 30 further includes an LED1 and an LED2, the LED1 is on when the auto adjustment mode is selected, and the LED2 is on when the express mode is selected.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a power line.

In one embodiment, the charging device further includes a power line 70, and the power line 70 is plugged and fixed with the output port and is used for outputting the voltage reduced or increased by the charging device; and a plug 710 for electrically connecting the power line 70 to the output port 60. Plug 710 is a cigarette lighter style plug. In this embodiment, the output port 60 is a socket that mates with a cigarette lighter style plug 710. The cigarette lighter style plug 710 includes a positive contact 711 and a negative contact 712. A positive feed 711 is provided at the end of the lighter plug 710. The cigarette lighter plug 710 has two negative contacts 712 disposed opposite each other on the sides of the cigarette lighter plug 710. The positive contact 711 and the negative contact 712 are both protruded metal contacts, and the metal contacts can be clamped with the protruded metal elastic sheet 601 in the output port 60, so that the connection between the plug 710 and the output port 60 is more stable. A15A protective tube is arranged in the cigarette lighting plug 710, and an automobile battery can be protected when voltage output is abnormal. The other end of the power cord 70 is provided with two alligator clips 72 for electrical connection with an automobile battery or vehicle-mounted equipment.

This embodiment provides and to provide multiple charging voltage, can satisfy the charging demand of car storage battery. And whether can automated inspection battery charging outfit be the car storage battery, the corresponding voltage of automatic selection charges. The lifting circuit controls the constant-current constant-voltage charging of the circuit through the PWM power supply controller, so that the problem that the current is too large when the battery with serious defects is charged at the moment of starting can be avoided, overcurrent protection of the charging circuit is caused, and normal charging cannot be realized. Meanwhile, the temperature detection module is arranged, so that the power utilization safety is ensured.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. A charging device is used for charging an automobile storage battery or vehicle-mounted equipment and is characterized by comprising a power module, a main control circuit, a lifting circuit, an adjusting circuit and an output port, wherein the charging device charges the automobile storage battery or the vehicle-mounted equipment through the output port; the power supply module is respectively electrically connected to the main control circuit and the lifting circuit and used for providing electric energy for the main control circuit and the lifting circuit; the main control circuit is also electrically connected with the adjusting circuit and the lifting circuit; the main control circuit is used for outputting an adjusting signal to the adjusting circuit, and the adjusting circuit controls the lifting circuit to output a first output voltage or a second output voltage to the output port according to the adjusting signal, wherein the second output voltage is higher than the first output voltage.

2. The charging device of claim 1, further comprising a detection circuit electrically connected to the main control circuit, the detection circuit being configured to detect whether the output port is connected to an automobile battery; when the output port is connected to an automobile battery, the detection circuit generates a detection signal; when the main control circuit detects the detection signal, the main control circuit sends an adjusting signal to the adjusting circuit, and the adjusting circuit controls the lifting circuit to output a second output voltage according to the adjusting signal.

3. The charging device of claim 2, wherein the detection circuit comprises a first detection resistor, a second detection resistor, and a detection node electrically connected between the first detection resistor and the second detection resistor, the detection node is electrically connected to the main control circuit, the first detection resistor is electrically connected to the output port, the second detection resistor is grounded, and the main control circuit is further configured to detect whether the detection node generates the detection signal when the lifting circuit is turned off.

4. The charging device according to claim 1 or 3, wherein the adjustment signal comprises a first adjustment signal, and the adjustment circuit controls the buck-boost circuit to output a second output voltage according to the first adjustment signal; the charging device further comprises a mode selection key, the mode selection key is used for a user to select a charging mode of the charging device, the charging mode comprises an automatic adjusting mode and a quick adjusting mode, and when the user selects the quick adjusting mode, the main control circuit sends the first adjusting signal to the adjusting circuit.

5. The charging device of claim 4, wherein the main control circuit turns off the lift circuit only in the auto-adjustment mode when the auto-adjustment mode is selected by a user.

6. The charging device according to claim 1, wherein the adjustment signal comprises a first adjustment signal and a second adjustment signal, the adjustment circuit comprises an electronic switch, a first feedback resistor, a second feedback resistor, a third feedback resistor, and a feedback node, the feedback node is electrically connected between the first feedback resistor and the second feedback resistor, the electronic switch is electrically connected between the third feedback resistor and the main control circuit, one end of the first feedback resistor, which is not connected to the feedback node, is electrically connected to the output port, the other end of the second feedback resistor, which is not connected to the first feedback resistor, is grounded, one end of the third feedback resistor is electrically connected to the feedback node, and the other end of the third feedback resistor is electrically connected to the electronic switch; the lifting circuit is also electrically connected to the feedback node, and when the main control circuit outputs the first adjusting signal, the electronic switch is closed; when the main control circuit outputs the second adjusting signal, the electronic switch is switched off.

7. The charging device of claim 6, wherein the electronic switch is a field effect transistor, a gate of the field effect transistor is electrically connected to the first pin of the main control circuit, a drain of the field effect transistor is electrically connected to one end of the third feedback resistor, and a source of the field effect transistor is grounded.

8. The charging device of claim 6, wherein the boost-buck circuit is configured to detect the voltage at the feedback node and boost or buck the voltage at the feedback node.

9. The charging device of claim 1, further comprising a power line, wherein a cigarette lighter type plug electrically connected to the output port is disposed at one end of the power line, the cigarette lighter type plug comprises a positive contact and a negative contact, and the positive contact and the negative contact are clamped with the positive electrode and the negative electrode in the output port to stabilize the electrical connection between the cigarette lighter type plug and the output port; the other end of the power line is provided with an alligator clip for connecting with an automobile storage battery or vehicle-mounted equipment to transmit electric energy.

10. The charging device according to claim 1, wherein the main control circuit is further connected with a temperature detection circuit, the temperature detection circuit comprises a thermistor, and two ends of the thermistor are respectively connected with the main control circuit and a ground.