CN210867214U

CN210867214U - Vehicle-mounted wireless charging device

Info

Publication number: CN210867214U
Application number: CN201921572112.9U
Authority: CN
Inventors: 车遵彬; 赵春波; 谢世浩; 刘志峰
Original assignee: Shenzhen Bardeen Microelectronics Co ltd
Current assignee: Shenzhen Bardeen Microelectronics Co ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-06-26
Anticipated expiration: 2029-09-20

Abstract

The embodiment of the utility model discloses on-vehicle wireless charging device, including wireless charging coil, including a motor, an end cap, a controller, and a cover plate, machinery arm lock, power voltage stabilizing module, MCU control module, motor drive module, cell-phone position detection module, charging coil drive module, current-voltage detection module, the external vehicle mounted power of power voltage stabilizing module input, MCU control module is connected to the output, motor drive module, cell-phone position detection module, current-voltage detection module, motor drive module is connected to MCU control module signal control end, cell-phone position detection module, current-voltage detection module, motor drive module connects the motor, charging coil drive module is connected with wireless charging coil and current-voltage detection module. The utility model discloses both can satisfy MCU power supply demand and can provide heavy current drive for the motor again, and the circuit is simple, with low costs, efficient.

Description

Vehicle-mounted wireless charging device

Technical Field

The utility model relates to an on-vehicle wireless charging technology field especially relates to an on-vehicle wireless charging device.

Background

Along with the popularization of wireless charging intelligent mobile phones and the development of mobile phone wireless chargers, the application of the mobile phone wireless chargers in vehicle-mounted products is also rapidly developed. The vehicle-mounted mobile phone wireless charger has the function of a mobile phone support, and simultaneously supports wireless charging of the mobile phone, so that management of wiring harnesses in a vehicle is facilitated, and driving safety is improved.

The current on-vehicle wireless charger power is mostly taken from the cigar lighter of car, and cigar lighter output voltage is 12V direct current voltage mostly, and control systems such as MCU can't directly be given to this voltage power supply. In addition, the vehicle-mounted wireless charger also comprises a motor circuit part, and the current requirement of the motor circuit part is larger. The whole system of the vehicle-mounted wireless charger has multi-directional requirements on the power supply, so that the input power supply needs to be adjusted.

The circuit that present charger adopted carries out two way processing to input power, needs to use voltage regulation module (LDO) and step-down module (DC/DC) simultaneously. The circuit design is relatively complex and costly, and the efficiency is reduced due to the DC/DC module.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve lies in, provides an on-vehicle wireless charging device to make and simplify circuit structure, reduce cost raise the efficiency simultaneously.

In order to solve the technical problem, the embodiment of the utility model provides an on-vehicle wireless charging device is proposed, including wireless charging coil, the motor and drive the clamp of realization to the cell-phone by the motor and press from both sides, loosen the mechanical arm lock of control action, still include power voltage stabilization module, MCU control module, motor drive module, cell-phone position detection module, charging coil drive module, current-voltage detection module, power voltage stabilization module input external vehicle mounted power, MCU control module is connected to the output, motor drive module, cell-phone position detection module, current-voltage detection module, motor drive module is connected to MCU control module signal control end, cell-phone position detection module, current-voltage detection module, motor drive module connects the motor, charging coil drive module is connected with wireless charging coil and current-voltage detection module.

Further, the motor driving module adopts a BDR6122T motor driving chip and is connected with two paths of PWM control signal pins of the MCU control module.

Furthermore, the mobile phone position detection module is a photoelectric sensing circuit or an infrared detection circuit and detects whether the distance between the mobile phone and the preset charging position is reached.

Further, the charging coil driving module comprises an LC resonance circuit, 2 BDR2L00 chips and 4N MOS, the PWM pin of the BDR2L00 chip is connected with the MCU control module, the UG pin and the LG pin of the 2 BDR2L00 chips are respectively connected with the G pole of 1N MOS through a resistor to form a full-bridge circuit, and the LC resonance circuit is connected with the full-bridge circuit.

The utility model discloses beneficial effect does: the motor driving circuit can meet the power supply requirement of the MCU and provide large current drive for the motor, and has the advantages of simple circuit, low cost and high efficiency.

Drawings

Fig. 1 is a schematic block diagram of an on-vehicle wireless charging device according to an embodiment of the present invention.

Fig. 2 is a circuit diagram of a power supply voltage stabilizing module according to an embodiment of the present invention.

Fig. 3 is a circuit diagram of a motor drive module according to an embodiment of the present invention.

Fig. 4 is an internal block diagram of BDR6122T according to an embodiment of the invention.

Fig. 5 is a circuit diagram of an infrared detection circuit according to an embodiment of the present invention.

Fig. 6 is a circuit diagram of the charging coil driving module according to an embodiment of the present invention.

Fig. 7 is a circuit diagram of a current and voltage detection module according to an embodiment of the present invention.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

In the embodiment of the present invention, if there is directional indication (such as upper, lower, left, right, front, and rear … …) only for explaining the relative position relationship between the components and the motion situation under a certain posture (as shown in the drawing), if the certain posture is changed, the directional indication is changed accordingly.

In addition, the descriptions of the first, second, etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Please refer to fig. 1, the utility model discloses on-vehicle wireless charging device mainly includes wireless charging coil, motor, mechanical arm lock (not shown in the figure), power voltage stabilizing module, MCU control module, motor drive module, cell-phone position detection module, charging coil drive module and current-voltage detection module.

The input end of a power supply voltage stabilization module (LDO) is externally connected with a vehicle-mounted power supply, and the output end of the LDO is connected with an MCU control module, a motor driving module, a mobile phone position detection module and a current and voltage detection module. As shown in fig. 2, the power supply regulator (LDO) regulates the 12V voltage input into a 5V voltage output for supplying power to the digital circuit part of the whole device, and provides a suitable and stable power supply for the digital power supply part of the MCU control module, the current and voltage detection module, the mobile phone position detection module, and the motor driving module.

The signal control end of the MCU control module is connected with the motor driving module, the mobile phone position detection module and the current and voltage detection module. The MCU control module is a control center of the whole device, analyzes and processes data detected by each detection circuit, and controls the charging coil driving module and the motor driving module to work according to execution logic and modes required by projects.

The motor is connected to the motor drive module, and charging coil drive module is connected with wireless charging coil and current-voltage detection module. The motor driving module receives the control signal output by the MCU control module to control the forward rotation, the reverse rotation, the braking, the closing and other actions of the motor. The torque of the motor is transmitted through the gear on the mechanical clamping arm, and the control actions such as clamping and loosening of the mobile phone are realized.

The mobile phone position detection module detects the position of the mobile phone, when the mobile phone is close to the vehicle-mounted wireless charging device, the MCU control module controls the motor driving module to open the mechanical clamping arm, so that the mobile phone can be normally placed into the vehicle-mounted wireless charging device; when the distance of the mobile phone reaches the 'putting-in' position, a signal is provided for the MCU control module, and the motor driving module is controlled to clamp the mechanical clamping arm, so that the mobile phone is prevented from falling off.

As shown in fig. 7, after the current and voltage signals collected by the current and voltage detection module are amplified by the operational amplifier, the input AD port of the MCU control module monitors and processes the current and voltage parameters of the coil by determining the collected signals.

As an implementation manner, the motor driving module adopts a BDR6122T motor driving chip, and is connected with two PWM control signal pins of the MCU control module, and a circuit diagram is shown in fig. 3. The BDR6122T chip is internally integrated with a full-bridge drive, and can directly drive a motor of a mechanical clamping arm; through two paths of PWM control signals, the forward rotation, the reverse rotation and the braking of the motor can be realized, and the motor has wide input voltage range and high-current driving capability.

The internal block diagram of the BDR6122T is shown in fig. 4, the BDR6122T is a dc brush motor driving IC, the full-bridge driving output is integrated inside, and the BDR6122 is suitable for electronic locks, wireless charging, toys, consumer products and other low-voltage or battery-powered motion control products. The output current reached 1.8A. There are two sets of operating voltages: the VM working range is 0-12V, and the VCC working range is 1.8-5.5V. Has a set of PWM (IN 1-IN 2) inputs and ultra-low output internal resistance. Overcurrent protection, undervoltage protection and overtemperature protection are integrated inside the circuit. The full-bridge control output logic is controlled by a group of PWM input signals (also called IN-IN control), each path of output is controlled by an input pin, and the control of the closing, forward rotation, reverse rotation and brake working states of the motor can be realized.

As an implementation manner, the mobile phone position detection module is a photoelectric sensing circuit or an infrared detection circuit, and detects whether the distance of the mobile phone reaches a preset charging position. The mobile phone position detection module is realized by adopting a photoelectric sensing circuit or an infrared detection circuit, and the photoelectric sensing circuit adopts a photoelectric distance sensing integrated IC (integrated Circuit), so that the precision is high, the anti-interference capability is strong, but the cost is high, and the program design is complex; the infrared detection circuit judges the position of the mobile phone away from the charging device according to the signal strength received by the infrared receiving and transmitting geminate transistors, the circuit is simple, the cost is low, and the use requirement of the charger can be met. The embodiment of the utility model provides an optimally adopt infrared detection circuit, detect the cell-phone apart from the position, concrete circuit is as shown in figure 5. As shown in fig. 5, the MCU controls the high and low levels of the IR _ SEND, the infrared transmitting tube transmits infrared light, the infrared receiving tube U1 converts the received infrared light signal into an electrical signal, and outputs the electrical signal to the MCU through the IR _ RECEIVE, and the MCU analyzes the received signal to determine the position information of the mobile phone from the charging device.

As an implementation mode, the charging coil driving module includes an LC resonant circuit, 2 BDR2L00 chips, and 4N MOS, the PWM pins of the BDR2L00 chip are all connected to the MCU control module, the UG pin and the LG pin of the 2 BDR2L00 chip are each connected to the G pole of 1N MOS through a resistor to form a full bridge circuit, the LC resonant circuit is connected to the full bridge circuit, and the circuit diagram is shown in fig. 6. The BDR2L00+ double N MOS 3010 form a full bridge circuit, as shown in fig. 6, the MCU sends two PWM signals, the full bridge output is driven by the BDR2L00, the coil L and the resonant capacitor C form an LC resonant circuit, the transmitting power is transmitted through the coil, the power is transferred to the receiving coil at the receiving position, and the transmission of wireless power is achieved.

The utility model provides a simple, high-efficient on-vehicle wireless charging device can be applied to input voltage 9VDC-14VDC, can support 1.8A motor drive output to the maximum extent, and its control system is independent with the drive circuit power, reduces the influence of heavy current to the control system power supply; furthermore, the utility model discloses cancelled DC/DC module circuit, motor work is driven by special motor drive IC, has integrateed multiple protection such as overflow, excess temperature, excessive pressure, when guaranteeing the normal work of motor, carries out abnormal protection to motor and whole device circuit.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an on-vehicle wireless charging device, including wireless charging coil, the motor and drive the clamp of realization to the cell-phone by the motor, loosen the mechanical arm lock of control action, a serial communication port, still include power voltage stabilization module, MCU control module, motor drive module, cell-phone position detection module, charging coil drive module, current-voltage detection module, the external vehicle mounted power of power voltage stabilization module input, MCU control module is connected to the output, motor drive module, cell-phone position detection module, current-voltage detection module, motor drive module is connected to MCU control module signal control end, cell-phone position detection module, current-voltage detection module, motor drive module connects the motor, charging coil drive module is connected with wireless charging coil and current-voltage detection module.

2. The vehicle-mounted wireless charging device of claim 1, wherein the motor driving module adopts a BDR6122T motor driving chip and is connected with two PWM control signal pins of the MCU control module.

3. The vehicle-mounted wireless charging device according to claim 1, wherein the mobile phone position detection module is a photoelectric sensing circuit or an infrared detection circuit and detects whether the distance between the mobile phone and the vehicle-mounted wireless charging device reaches a preset charging position.

4. The vehicle-mounted wireless charging device of claim 1, wherein the charging coil driving module comprises an LC resonance circuit, 2 BDR2L00 chips and 4N MOS, PWM pins of the BDR2L00 chips are connected with the MCU control module, UG pins and LG pins of the 2 BDR2L00 chips are connected with G poles of the 1N MOS through a resistor to form a full bridge circuit, and the LC resonance circuit is connected with the full bridge circuit.