CN117476046A - CD playing device, playing system and control method for new energy automobile - Google Patents

CD playing device, playing system and control method for new energy automobile Download PDF

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Publication number
CN117476046A
CN117476046A CN202311825156.9A CN202311825156A CN117476046A CN 117476046 A CN117476046 A CN 117476046A CN 202311825156 A CN202311825156 A CN 202311825156A CN 117476046 A CN117476046 A CN 117476046A
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CN
China
Prior art keywords
resistor
pin
vehicle
new energy
energy automobile
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CN202311825156.9A
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Chinese (zh)
Inventor
杜剑
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Shenzhen Shanling Digital Technology Development Co ltd
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Shenzhen Shanling Digital Technology Development Co ltd
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Priority to CN202311825156.9A priority Critical patent/CN117476046A/en
Publication of CN117476046A publication Critical patent/CN117476046A/en
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • G06F3/162—Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B31/00—Arrangements for the associated working of recording or reproducing apparatus with related apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a CD playing device, a playing system and a control method for a new energy automobile, wherein the device comprises a main control module, a core module and a wireless communication module; the movement module and the wireless communication module are connected with the main control module; the main control module is connected with a charging seat in the new energy automobile; the main control module comprises a main control chip and a vehicle-mounted connecting circuit, wherein the vehicle-mounted connecting circuit is connected with the charging seat, and the vehicle-mounted connecting circuit is also connected with the main control chip. Through implementing this embodiment, the on-vehicle connection circuit utilizes the signal of telecommunication of transmission from the charging seat in order to realize the start-up of CD play device, switch to CD play on-vehicle mode, establish wireless communication connection with new energy automobile's audio equipment, the core module obtains and sends audio data to audio equipment in order to carry out audio play's automated process, therefore, when driving the automobile, reduce the possibility of accident emergence, and then improved driving safety.

Description

CD playing device, playing system and control method for new energy automobile
Technical Field
The invention relates to the technical field of audio playing of new energy automobiles, in particular to a CD playing device, a playing system and a control method for the new energy automobiles.
Background
In the existing new energy automobiles, a Compact Disc (CD) playing device is not configured, so that the discs purchased before cannot be used continuously. In view of this situation, many CD playing devices are currently available on the market to supplement the new energy automobile, but the CD playing devices are not configured in the original automobile, that is, when the external CD playing device is used on the new energy automobile, phenomena such as manual on/off, and no audio equipment connected to the new energy automobile can occur, so that safe driving is affected, and accidents are easy to occur.
Disclosure of Invention
The embodiment of the invention provides a CD playing device, a playing system and a control method for a new energy automobile, and aims to solve the problems that an external CD playing device in the prior art needs to be manually turned on or turned off, cannot be connected to sound equipment of the new energy automobile and the like when the external CD playing device is used on the new energy automobile, so that safe driving is affected, and potential safety hazards exist.
In order to solve the above problems, in a first aspect, an embodiment of the present invention provides a CD playing apparatus for a new energy automobile, including a main control module, a core module, and a wireless communication module; the movement module and the wireless communication module are connected with the main control module; the main control module is connected with a charging seat in the new energy automobile; the main control module comprises a main control chip and a vehicle-mounted connection circuit, wherein the vehicle-mounted connection circuit is connected with the charging seat, and the vehicle-mounted connection circuit is also connected with the main control chip; the vehicle-mounted connection circuit is used for controlling the CD playing device for the new energy automobile to start up and automatically switch to a CD playing vehicle-mounted mode through the electric signal obtained from the charging seat after the new energy automobile is started; the wireless communication module is used for establishing wireless communication connection with the sound equipment of the new energy automobile when the CD plays the vehicle-mounted mode; and the movement module is used for sending the audio data to the sound equipment through the wireless communication module to play the audio when the audio data is read in the CD playing vehicle-mounted mode.
In a second aspect, an embodiment of the present invention further provides a CD playing system for a new energy automobile, where the CD playing system includes a charging stand of the new energy automobile and the CD playing device for the new energy automobile according to the first aspect, where the CD playing device includes a main control module, a core module and a wireless communication module; the movement module and the wireless communication module are connected with the main control module; the main control module is connected with the charging seat; the main control module comprises a main control chip and a vehicle-mounted connection circuit, wherein the vehicle-mounted connection circuit is connected with the charging seat, and the vehicle-mounted connection circuit is also connected with the main control chip; the vehicle-mounted connection circuit is used for controlling the CD playing device to start up and automatically switch to a CD playing vehicle-mounted mode through an electric signal obtained from the charging seat after the new energy automobile is started; the wireless communication module is used for establishing wireless communication connection with the sound equipment of the new energy automobile when the CD plays the vehicle-mounted mode; and the movement module is used for sending the audio data to the sound equipment through the wireless communication module to play the audio when the audio data is read in the CD playing vehicle-mounted mode.
In a third aspect, an embodiment of the present invention further provides a control method for a CD playing system of a new energy automobile, where the method is applied to the CD playing system of a new energy automobile according to the second aspect, and the method includes that when the new energy automobile is started by a charging stand and generates an electrical signal, the electrical signal is transmitted to a vehicle-mounted connection circuit; the vehicle-mounted connection circuit generates a starting signal for controlling the starting of the CD playing device according to the electric signal and transmits the starting signal to the main control chip; the main control chip controls a CD playing device in a CD playing system of the new energy automobile to start and automatically switch to a CD playing vehicle-mounted mode according to the starting signal; the wireless communication module establishes wireless communication connection with sound equipment of the new energy automobile when the CD plays the vehicle-mounted mode; when the core module reads the audio data in the CD playing vehicle-mounted mode, the audio data are sent to the sound equipment of the new energy automobile through the wireless communication module to play the audio.
The embodiment of the invention provides a CD playing device, a playing system and a control method for a new energy automobile, wherein the device comprises a main control module, a core module and a wireless communication module; the movement module and the wireless communication module are connected with the main control module; the main control module is connected with a charging seat in the new energy automobile; the main control module comprises a main control chip and a vehicle-mounted connection circuit, wherein the vehicle-mounted connection circuit is connected with the charging seat, and the vehicle-mounted connection circuit is also connected with the main control chip; the vehicle-mounted connection circuit is used for controlling the CD playing device for the new energy automobile to start up and automatically switch to a CD playing vehicle-mounted mode through the electric signal obtained from the charging seat after the new energy automobile is started; the wireless communication module is used for establishing wireless communication connection with the sound equipment of the new energy automobile when the CD plays the vehicle-mounted mode; the machine core module is used for sending the audio data to the sound equipment through the wireless communication module to play the audio when the audio data is read in the CD playing vehicle-mounted mode; the vehicle-mounted connection circuit obtains the electric signal from the charging seat to realize the starting-up starting of the CD playing device, switch the CD playing vehicle-mounted mode, establish wireless communication connection with the sound equipment of the new energy automobile, and send the audio data to the sound equipment to carry out the automatic process of audio playing, so that the automobile can be safely driven, the possibility of accident occurrence is reduced, and the driving safety is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a vehicle-mounted connection circuit in a CD playing device for a new energy automobile according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a CD player for a new energy automobile according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a CD playing system for a new energy automobile according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method of a CD playing system for a new energy automobile according to an embodiment of the present invention.
Wherein, each reference sign in the figure:
1. a CD playing system for the new energy automobile; 10. a charging stand; 20. An acoustic device; 30. A CD playing device for the new energy automobile; 40. a main control module; 41. a main control chip; 42. a vehicle-mounted connection circuit; 50. a movement module; 60. and a wireless communication module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms of directions used in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., refer only to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the invention and is not limiting of the invention. In addition, in the drawings, structures similar or identical to those of the drawings are denoted by the same reference numerals.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1-2, fig. 1 is a schematic block diagram of a vehicle-mounted connection circuit in a CD playing device for a new energy automobile according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a CD player for a new energy automobile according to an embodiment of the present invention.
As shown in fig. 1-2, an embodiment of the present invention provides a CD playing device 30 for a new energy automobile, which includes a main control module 40, a movement module 50 and a wireless communication module 60; the movement module 50 and the wireless communication module 60 are connected with the main control module 40; the main control module 40 is connected with a charging seat in the new energy automobile; the main control module 40 comprises a main control chip 41 and a vehicle-mounted connection circuit 42, wherein the vehicle-mounted connection circuit 42 is connected with the charging seat, and the vehicle-mounted connection circuit 42 is also connected with the main control chip 41;
The vehicle-mounted connection circuit 42 is configured to control the CD playing device 30 for the new energy automobile to start up and automatically switch to a CD playing vehicle-mounted mode through the electric signal obtained from the charging stand after the new energy automobile starts up;
the wireless communication module 60 is configured to establish a wireless communication connection with the audio device of the new energy automobile when the CD plays the vehicle-mounted mode;
the deck module 50 is configured to send the audio data to the audio device through the wireless communication module 60 for audio playing when the audio data is read in the CD-play vehicle-mounted mode.
In this embodiment, the charging stand is a USB (Universal Serial Bus ) socket interface disposed in the new energy automobile, and may be connected to the CD player 30 for the new energy automobile through a TYPE-C USB data line; one end of the TYPE-C USB data line is connected with the charging seat, and the other end of the TYPE-C USB data line is connected with the vehicle-mounted connection circuit 42 of the CD playing device 30 for the new energy automobile.
After the new energy automobile is started, the charging seat acquires the electric signal transmitted by the new energy automobile and transmits the electric signal to the vehicle-mounted connection circuit 42 through the TYPE-C USB data line; the vehicle-mounted connection circuit 42 can control the CD playing device 30 for the new energy automobile to start up and automatically switch to a CD playing vehicle-mounted mode based on the electric signal; the wireless communication module 60 establishes wireless communication connection with the audio equipment of the new energy automobile when the CD plays the vehicle-mounted mode; when the movement module 50 reads the audio data in the CD playing vehicle-mounted mode, the audio data is sent to the main control chip, and the main control chip sends the audio data to the audio device through the wireless communication module 60 for audio playing.
The CD playing vehicle-mounted mode refers to a state in which the CD playing device 30 for the new energy automobile can automatically establish wireless communication connection with the audio device of the new energy automobile by using the wireless communication module 60; the wireless communication connection module may use bluetooth signals to establish wireless communication connection between the CD playing device 30 for the new energy automobile and the audio device of the new energy automobile.
As can be seen from the above embodiment, the vehicle-mounted connection circuit 42 can control the starting-up of the CD playing device 30 for the new energy automobile to be automatically switched to the CD playing vehicle-mounted mode after the new energy automobile is started, and the wireless communication module 60 establishes wireless communication connection with the audio device of the new energy automobile in the CD playing vehicle-mounted mode; when the movement module 50 reads the audio data in the CD playing vehicle-mounted mode, the audio data is sent to the main control chip, and the main control chip sends the audio data to the audio device through the wireless communication module 60 for audio playing. In this way, the automatic processes of starting up the CD playing device 30 for the new energy automobile, switching the vehicle-mounted mode of CD playing, establishing wireless communication connection with the audio equipment of the new energy automobile, and sending the audio data to the audio equipment for audio playing are realized, so that the automobile can be safely driven, the possibility of accident occurrence is reduced, and the driving safety is further improved.
In an embodiment, as shown in fig. 1, the vehicle-mounted connection circuit 42 includes an interface chip U1, a first resistor R1, a first diode D1, a first switch S1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first triode Q1;
the interface chip U1 is connected with a VBUS2 pin of the charging seat and a first end of the first resistor R1; the normal open end of the first switch S1 is connected with the second end of the first resistor R1 and the anode of the first diode D1; the public end of the first switch S1 is connected with the first end of the second resistor R2; the second end of the second resistor R2 is connected with the first end of the third resistor R3; the second end of the third resistor R3 is connected with the base electrode of the first triode Q1; the collector of the first triode Q1 is connected with the second end of the fourth resistor R4 and the PRST_N pin of the main control chip 41; the first end of the fourth resistor R4 is connected with the charging seat.
In this embodiment, as shown in fig. 1, the second end of the second resistor R2 is further connected to the collector of the first triode Q1; the base of the first triode Q1 is connected with the dpwr_en pin of the main control chip 41, and the negative electrode of the first diode D1, the emitter of the first triode Q1, the emitter of the second triode, and the normally-closed end of the first switch S1 are all grounded. The first end of the first resistor R1 is connected with a VBUS2 pin of the charging seat through the interface chip U1; the first end of the fourth resistor R4 may be connected to a vddcrtc power supply provided by the charging stand, where the vddcrtc power supply is always kept at +1.8v.
The interface chip U1 is a TYPE-C USB chip; the first switch S1 is one of a group of single-pole double-throw switches (DPDT), and the ON of the first switch S1 can be controlled by a dc voltage, i.e. the first switch S1 can be controlled to switch to a normally open end ON pin; the first diode D1 may be a zener diode; the specification of the first resistor R1 may be 1K; the specification of the first diode D1 may be 3V3; the second resistor R2 may have a specification of 10K; the specification of the third resistor R3 may be 2K2; the fourth resistor R4 may have a specification of 100K; the first triode Q1 may be an NPN triode, and its specification may be S8050; the second triode may be an NPN triode with a damping resistor, and may be of the specification DTC124EKA.
In this embodiment, as shown in fig. 1, the first resistor R1, the first diode D1, the first switch S1, the second resistor R2, the third resistor R3, the fourth resistor R4, and the first triode Q1 may control the on of the CD player 30 for the new energy automobile. Specifically, after the new energy automobile is started, the electrical signal obtained by the charging stand is transmitted to the interface chip U1 through the VBUS2 pin, the electrical signal is transmitted to the first resistor R1 and the first diode D1 by the interface chip U1, at this time, the electrical signal is reduced to +3.3v, then the reduced electrical signal +3.3v is transmitted to the normally open end ON pin of the first switch S1 to turn ON the first switch S1, the reduced electrical signal +3.3v is transmitted to the base of the second resistor R2, the third resistor R3 and the first triode Q1 to make the first triode Q1 be in a conducting state, at this time, the primary high potential is converted to 0 potential by the prst_n signal, and the primary control chip 41 obtains the prst_n signal of 0 potential through the prst_n pin to realize resetting so as to turn ON the CD 30 for the new energy automobile; the CD playing device 30 for the new energy automobile is started under the control of the main control chip 41, and the operation of other modules is controlled by the main control chip 41; the dpwr_en pin is connected to the base electrode of the second triode, and the second triode is in a cut-off state because the dpwr_en pin is at 0 potential when the CD player 30 for the new energy automobile is turned off.
As can be seen from the above embodiment, when the vehicle-mounted connection circuit 42 receives the electrical signal transmitted by the charging stand, the automatic on of the CD playing device 30 for the new energy automobile can be controlled by the interface chip U1, the first resistor R1, the first diode D1, the first switch S1, the second resistor R2, the third resistor R3, the fourth resistor R4 and the first triode Q1. Therefore, after the new energy automobile is started, the on-vehicle connection circuit 42 automatically opens the CD playing device 30 for the new energy automobile, so that safe driving can be realized, the possibility of accident occurrence is reduced, and the driving safety is further improved.
In an embodiment, as shown in fig. 1, the vehicle-mounted connection circuit 42 further includes a fifth resistor R5, a second diode D2, a second switch S2, a sixth resistor R6, and a third transistor Q3;
the first end of the fifth resistor R5 is connected with the charging seat, and the second end of the fifth resistor R5 is connected with the PC08 pin of the main control chip 41 and the collector of the third triode Q3; the base electrode of the third triode Q3 is connected with the cathode of the second diode D2 and the first end of the sixth resistor R6; the positive electrode of the second diode D2 is connected with the common end of the second switch S2; the normally open end of the second switch S2 is connected to the second end of the first resistor R1 and the positive electrode of the first diode D1.
In this embodiment, as shown in fig. 1, the emitter of the third triode Q3, the second end of the sixth resistor R6, and the normally-closed end of the second switch S2 are all grounded. The first end of the fifth resistor R5 may be connected to a +3.3vd power supply provided by the charging stand.
Wherein the second switch S2 is one group of single pole double throw switches in a double pole double throw switch (DPDT), and the second switch S2 can be controlled to be turned ON by a direct current voltage, i.e. the second switch S2 can be controlled to be switched to a normally open end ON pin; the second diode D2 may have a specification of 1N4148; the sixth resistor R6 may have a specification of NM; the third triode Q3 can be an NPN triode with a damping resistor, and the specification of the third triode Q3 can be DTC124EKA; the fifth resistor R5 may have a specification of 10K.
In this embodiment, as shown in fig. 1, the CD playing device 30 for a new energy automobile may be controlled to automatically switch to the CD playing vehicle-mounted mode through the fifth resistor R5, the second diode D2, the second switch S2, the sixth resistor R6 and the third triode Q3. Specifically, after the new energy automobile is started, the electrical signal obtained by the charging stand is transmitted to the interface chip U1 through the VBUS2 pin, the electrical signal is transmitted to the first resistor R1 and the first diode D1 by the interface chip U1, at this time, the electrical signal is reduced to +3.3v, then the reduced electrical signal +3.3v is transmitted to the normally open end ON pin of the second switch S2 to turn ON the second switch S2, the reduced electrical signal +3.3v is transmitted to the base of the third triode Q3 through the second diode D2 to enable the third triode Q3 to be in a conducting state, the pc_08 signal of the pc_08 pin becomes a low potential, at this time, the master control chip 41 determines that the CD playing device 30 for the new energy automobile is in the CD playing vehicle-mounted mode, and automatically connects the CD playing device for the new energy automobile to the new energy automobile through the bluetooth communication device to the wireless communication device to establish the wireless communication device for the new energy automobile in the CD vehicle-mounted mode. Wherein, the bluetooth input mode is a state that can receive a bluetooth signal of an automobile.
After the new energy automobile is flameout, the charging seat VBUS2 is turned off, the normally open end of the second switch S2 is switched to the normally closed end, so that the third triode Q3 is in a cut-off state, the pc_08 signal of the pc_08 pin becomes high potential, and after the main control chip reads the change of the pc_08 pin, a shutdown prompt window will pop up on the screen module of the CD playing device 30 for the new energy automobile, and then the power-off is automatically turned off after 10S.
As can be seen from the above embodiment, when the electrical signal transmitted by the charging stand is received, the vehicle-mounted connection circuit 42 can control the CD playing device 30 for the new energy automobile to automatically switch to the CD playing vehicle-mounted mode through the fifth resistor R5, the second diode D2, the second switch S2, the sixth resistor R6 and the third triode Q3. Therefore, after the new energy automobile is started, the automatic switching of the CD playing vehicle-mounted mode of the CD playing device 30 for the new energy automobile is realized through the vehicle-mounted connection circuit 42, so that the wireless communication connection between the CD playing device 30 for the new energy automobile and the audio equipment of the new energy automobile is established in the CD playing vehicle-mounted mode, thereby safe driving can be realized, the possibility of accident occurrence is reduced, and the driving safety is further improved.
In an embodiment, as shown in fig. 1, the interface chip U1 includes an A4 pin, an A5 pin, a B4 pin, and a B9 pin, where the A4 pin, the A9 pin, the B4 pin, and the B9 pin are all connected with the VBUS2 pin of the charging stand.
In this embodiment, the interface chip U1 includes an a portion, a B portion, A1 st pin, A2 nd pin, A3 rd pin, and A4 th pin, where the a portion includes an A1 pin, an A2 pin, an A3 pin, an A4 pin, an A5 pin, an A6 pin, an A7 pin, an A8 pin, an A9 pin, an a10 pin, an a11 pin, and an a12 pin, and the B portion includes a B1 pin, a B2 pin, a B3 pin, a B4 pin, a B5 pin, a B6 pin, a B7 pin, a B8 pin, a B9 pin, a B10 pin, a B11 pin, and a B12 pin; wherein, the A4 pin, the A9 pin, the B4 pin and the B9 pin are all connected with the VBUS2 pin of the charging seat; the A1 pin, the A12 pin, the B1 pin, the B12 pin, the 1 st pin, the 2 nd pin, the 3 rd pin and the 4 th pin are all grounded.
In this embodiment, the VBUS2 pin is connected to the interface chip U1, and the VBUS2 pin transmits the electrical signal to the first resistor R1 through the A4 pin, the A9 pin, the B4 pin, and the B9 pin of the interface chip U1.
Through the above embodiment, it can be seen that the interface chip U1 realizes the transmission of the electrical signal, and further performs the subsequent targeted processing according to the electrical signal.
As shown in fig. 1 to 3, the embodiment of the present invention further provides a CD playing system 1 for a new energy automobile, including: a charging stand 10 of a new energy automobile and a CD playing device 30 for the new energy automobile; the CD playing device 30 for the new energy automobile comprises a main control module 40, a movement module 50 and a wireless communication module 60; the movement module 50 and the wireless communication module 60 are connected with the main control module 40; the main control module 40 is connected with the charging seat; the main control module 40 comprises a main control chip 41 and a vehicle-mounted connection circuit 42, wherein the vehicle-mounted connection circuit 42 is connected with the charging seat, and the vehicle-mounted connection circuit 42 is also connected with the main control chip 41; the vehicle-mounted connection circuit 42 is configured to control the CD playing device 30 for the new energy automobile to start up and automatically switch to a CD playing vehicle-mounted mode through the electric signal obtained from the charging stand after the new energy automobile starts up; the wireless communication module 60 is configured to establish a wireless communication connection with the audio device 20 of the new energy automobile when the CD plays the vehicle-mounted mode; the deck module 50 is configured to send the audio data to the main control chip 41 when the audio data is read in the CD-play vehicle-mounted mode, and the main control chip 41 sends the audio data to the audio device 20 through the wireless communication module 60 for audio play.
In this embodiment, the charging stand is a USB (Universal Serial Bus ) socket interface disposed in the new energy automobile, and may be connected to the CD player 30 for the new energy automobile through a TYPE-C USB data line; one end of the TYPE-C USB data line is connected with the charging seat, and the other end of the TYPE-C USB data line is connected with the vehicle-mounted connection circuit 42 of the CD playing device 30 for the new energy automobile.
After the new energy automobile is started, the charging seat acquires the electric signal transmitted by the new energy automobile and transmits the electric signal to the vehicle-mounted connection circuit 42 through the TYPE-C USB data line; the vehicle-mounted connection circuit 42 can control the CD playing device 30 for the new energy automobile to start up and automatically switch to a CD playing vehicle-mounted mode based on the electric signal; the wireless communication module 60 establishes wireless communication connection with the audio device 20 of the new energy automobile when the CD plays the vehicle-mounted mode; when the movement module 50 reads the audio data in the CD playing vehicle-mounted mode, the audio data is sent to the main control chip 41, and the main control chip 41 sends the audio data to the audio device 20 through the wireless communication module 60 for audio playing.
Wherein, the CD playing in-vehicle mode refers to a state that the CD playing device 30 for a new energy automobile can automatically establish wireless communication connection with the audio device 20 of the new energy automobile by using the wireless communication module 60; the wireless communication connection module may use bluetooth signals to establish wireless communication connection between the CD player 30 for the new energy automobile and the audio device 20 of the new energy automobile.
As can be seen from the above embodiment, the vehicle-mounted connection circuit 42 can control the start-up of the CD playing device 30 for the new energy automobile to be switched to the CD playing vehicle-mounted mode automatically after the new energy automobile is started, and the wireless communication module 60 establishes wireless communication connection with the audio device 20 of the new energy automobile in the CD playing vehicle-mounted mode; when the deck module 50 reads the audio data in the CD-play vehicle mode, the audio data is sent to the audio device 20 through the wireless communication module 60 for audio play. In this way, the automatic processes of starting up the CD playing device 30 for the new energy automobile, switching the vehicle-mounted mode of CD playing, establishing wireless communication connection with the audio device 20 of the new energy automobile, and sending the audio data to the audio device 20 for audio playing are realized, so that the automobile can be safely driven, the possibility of accident occurrence is reduced, and the driving safety is further improved.
In an embodiment, as shown in fig. 1, the vehicle-mounted connection circuit 42 includes an interface chip U1, a first resistor R1, a first diode D1, a first switch S1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first triode Q1;
the interface chip U1 is connected with a VBUS2 pin of the charging seat and a first end of the first resistor R1; the normal open end of the first switch S1 is connected with the second end of the first resistor R1 and the anode of the first diode D1; the public end of the first switch S1 is connected with the first end of the second resistor R2; the second end of the second resistor R2 is connected with the first end of the third resistor R3; the second end of the third resistor R3 is connected with the base electrode of the first triode Q1; the collector of the first triode Q1 is connected with the second end of the fourth resistor R4 and the PRST_N pin of the main control chip 41; the first end of the fourth resistor R4 is connected with the charging seat.
In this embodiment, as shown in fig. 1, the second end of the second resistor R2 is further connected to the collector of the first triode Q1; the base of the first triode Q1 is connected with the dpwr_en pin of the main control chip 41, and the negative electrode of the first diode D1, the emitter of the first triode Q1, the emitter of the second triode, and the normally-closed end of the first switch S1 are all grounded. The first end of the first resistor R1 is connected with a VBUS2 pin of the charging seat through the interface chip U1; the first end of the fourth resistor R4 may be connected to a vddcrtc power supply provided by the charging stand, where the vddcrtc power supply is always kept at +1.8v.
The interface chip U1 is a TYPE-C USB chip; the first switch S1 is one of a group of single-pole double-throw switches (DPDT), and the ON of the first switch S1 can be controlled by a dc voltage, i.e. the first switch S1 can be controlled to switch to a normally open end ON pin; the first diode D1 may be a zener diode; the specification of the first resistor R1 may be 1K; the specification of the first diode D1 may be 3V3; the second resistor R2 may have a specification of 10K; the specification of the third resistor R3 may be 2K2; the fourth resistor R4 may have a specification of 100K; the first triode Q1 may be an NPN triode, and its specification may be S8050; the second triode may be an NPN triode with a damping resistor, and may be of the specification DTC124EKA.
In this embodiment, as shown in fig. 1, the first resistor R1, the first diode D1, the first switch S1, the second resistor R2, the third resistor R3, the fourth resistor R4, and the first triode Q1 may control the on of the CD player 30 for the new energy automobile. Specifically, after the new energy automobile is started, the electrical signal obtained by the charging stand is transmitted to the interface chip U1 through the VBUS2 pin, the electrical signal is transmitted to the first resistor R1 and the first diode D1 by the interface chip U1, at this time, the electrical signal is reduced to +3.3v, then the reduced electrical signal +3.3v is transmitted to the normally open end ON pin of the first switch S1 to turn ON the first switch S1, the reduced electrical signal +3.3v is transmitted to the base of the second resistor R2, the third resistor R3 and the first triode Q1 to make the first triode Q1 be in a conducting state, at this time, the primary high potential is converted to 0 potential by the prst_n signal, and the primary control chip 41 obtains the prst_n signal of 0 potential through the prst_n pin to realize resetting so as to turn ON the CD 30 for the new energy automobile; the CD playing device 30 for the new energy automobile is started under the control of the main control chip 41, and the operation of other modules is controlled by the main control chip 41; the dpwr_en pin is connected to the base electrode of the second triode, and the second triode is in a cut-off state because the dpwr_en pin is at 0 potential when the CD player 30 for the new energy automobile is turned off.
As can be seen from the above embodiment, when the vehicle-mounted connection circuit 42 receives the electrical signal transmitted by the charging stand, the automatic on of the CD playing device 30 for the new energy automobile can be controlled by the interface chip U1, the first resistor R1, the first diode D1, the first switch S1, the second resistor R2, the third resistor R3, the fourth resistor R4 and the first triode Q1. Therefore, after the new energy automobile is started, the on-vehicle connection circuit 42 automatically opens the CD playing device 30 for the new energy automobile, so that safe driving can be realized, the possibility of accident occurrence is reduced, and the driving safety is further improved.
In an embodiment, as shown in fig. 1, the vehicle-mounted connection circuit 42 further includes a fifth resistor R5, a second diode D2, a second switch S2, a sixth resistor R6, and a third transistor Q3;
the first end of the fifth resistor R5 is connected with the charging seat, and the second end of the fifth resistor R5 is connected with the PC08 pin of the main control chip 41 and the collector of the third triode Q3; the base electrode of the third triode Q3 is connected with the cathode of the second diode D2 and the first end of the sixth resistor R6; the positive electrode of the second diode D2 is connected with the common end of the second switch S2; the normally open end of the second switch S2 is connected to the second end of the first resistor R1 and the positive electrode of the first diode D1.
In this embodiment, as shown in fig. 1, the emitter of the third triode Q3, the second end of the sixth resistor R6, and the normally-closed end of the second switch S2 are all grounded. The first end of the fifth resistor R5 may be connected to a +3.3vd power supply provided by the charging stand.
Wherein the second switch S2 is one group of single pole double throw switches in a double pole double throw switch (DPDT), and the second switch S2 can be controlled to be turned ON by a direct current voltage, i.e. the second switch S2 can be controlled to be switched to a normally open end ON pin; the second diode D2 may have a specification of 1N4148; the sixth resistor R6 may have a specification of NM; the third triode Q3 can be an NPN triode with a damping resistor, and the specification of the third triode Q3 can be DTC124EKA; the fifth resistor R5 may have a specification of 10K.
In this embodiment, as shown in fig. 1, the CD playing device 30 for a new energy automobile may be controlled to automatically switch to the CD playing vehicle-mounted mode through the fifth resistor R5, the second diode D2, the second switch S2, the sixth resistor R6 and the third triode Q3. Specifically, after the new energy automobile is started, the electrical signal obtained by the charging stand is transmitted to the interface chip U1 through the VBUS2 pin, the electrical signal is transmitted to the first resistor R1 and the first diode D1 by the interface chip U1, at this time, the electrical signal is reduced to +3.3v, then the reduced electrical signal +3.3v is transmitted to the normally open end ON pin of the second switch S2 to turn ON the second switch S2, the reduced electrical signal +3.3v is transmitted to the base of the third triode Q3 through the second diode D2 to enable the third triode Q3 to be in a conducting state, the pc_08 signal of the pc_08 pin becomes a low potential, at this time, the master control chip 41 determines that the CD playing device 30 for the new energy automobile is in the CD playing vehicle-mounted mode, and automatically connects the CD playing device for the new energy automobile to the wireless communication device for wireless communication to the new energy automobile via the bluetooth communication device to establish the wireless communication device 20 in the CD vehicle-mounted mode. Wherein, the bluetooth input mode is a state that can receive a bluetooth signal of an automobile.
After the new energy automobile is flameout, the charging seat VBUS2 is turned off, the normally open end of the second switch S2 is switched to the normally closed end, so that the third triode Q3 is in a cut-off state, the pc_08 signal of the pc_08 pin becomes high potential, and after the main control chip reads the change of the pc_08 pin, a shutdown prompt window will pop up on the screen module of the CD playing device 30 for the new energy automobile, and then the power-off is automatically turned off after 10S.
As can be seen from the above embodiment, when the electrical signal transmitted by the charging stand is received, the vehicle-mounted connection circuit 42 can control the CD playing device 30 for the new energy automobile to automatically switch to the CD playing vehicle-mounted mode through the fifth resistor R5, the second diode D2, the second switch S2, the sixth resistor R6 and the third triode Q3. Therefore, after the new energy automobile is started, the automatic switching of the CD playing vehicle-mounted mode of the CD playing device 30 for the new energy automobile is realized through the vehicle-mounted connection circuit 42, so that the wireless communication connection between the CD playing device 30 for the new energy automobile and the audio equipment 20 of the new energy automobile is established in the CD playing vehicle-mounted mode, thereby safe driving can be realized, the possibility of accident occurrence is reduced, and the driving safety is further improved.
In an embodiment, as shown in fig. 1, the interface chip U1 includes an A4 pin, an A5 pin, a B4 pin, and a B9 pin, where the A4 pin, the A9 pin, the B4 pin, and the B9 pin are all connected with the VBUS2 pin of the charging stand.
In this embodiment, the interface chip U1 includes an a portion, a B portion, A1 st pin, A2 nd pin, A3 rd pin, and A4 th pin, where the a portion includes an A1 pin, an A2 pin, an A3 pin, an A4 pin, an A5 pin, an A6 pin, an A7 pin, an A8 pin, an A9 pin, an a10 pin, an a11 pin, and an a12 pin, and the B portion includes a B1 pin, a B2 pin, a B3 pin, a B4 pin, a B5 pin, a B6 pin, a B7 pin, a B8 pin, a B9 pin, a B10 pin, a B11 pin, and a B12 pin; wherein, the A4 pin, the A9 pin, the B4 pin and the B9 pin are all connected with the VBUS2 pin of the charging seat; the A1 pin, the A12 pin, the B1 pin, the B12 pin, the 1 st pin, the 2 nd pin, the 3 rd pin and the 4 th pin are all grounded.
In this embodiment, the VBUS2 pin is connected to the interface chip U1, and the VBUS2 pin transmits the electrical signal to the first resistor R1 through the A4 pin, the A9 pin, the B4 pin, and the B9 pin of the interface chip U1.
Through the above embodiment, it can be seen that the interface chip U1 realizes the transmission of the electrical signal, and further performs the subsequent targeted processing according to the electrical signal.
The embodiment of the invention also provides a control method of the CD playing system for the new energy automobile, and fig. 4 is a flow chart of the control method of the CD playing system for the new energy automobile. The control method for the CD playing system of the new energy automobile is applied to the CD playing system of the new energy automobile. As shown in fig. 4, the method includes the following steps S110 to S150.
And S110, when the new energy automobile starts and generates an electric signal, the charging seat transmits the electric signal to the vehicle-mounted connection circuit.
In this embodiment, the CD playing system for a new energy automobile includes: a charging seat and a CD playing device of the new energy automobile; the CD playing device comprises a main control module, a core module and a wireless communication module; the movement module and the wireless communication module are connected with the main control module; the main control module is connected with the charging seat; the main control module comprises a main control chip and a vehicle-mounted connection circuit, wherein the vehicle-mounted connection circuit is connected with the charging seat, and the vehicle-mounted connection circuit is also connected with the main control chip; the vehicle-mounted connection circuit is used for controlling the CD playing device to start up and automatically switch to a CD playing vehicle-mounted mode through an electric signal obtained from the charging seat after the new energy automobile is started; the wireless communication module is used for establishing wireless communication connection with the sound equipment of the new energy automobile when the CD plays the vehicle-mounted mode; and the movement module is used for sending the audio data to the sound equipment through the wireless communication module to play the audio when the audio data is read in the CD playing vehicle-mounted mode.
In this embodiment, the charging stand is a USB (Universal Serial Bus ) socket interface disposed in the new energy automobile, and may be connected to the CD player through a TYPE-C USB data line; one end of the TYPE-C USB data line is connected with the charging seat, and the other end of the TYPE-C USB data line is connected with the vehicle-mounted connection circuit of the CD playing device. The vehicle-mounted connection circuit comprises an interface chip U1, a first resistor R1, a first diode D1, a first switch S1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first triode Q1, a fifth resistor R5, a second diode D2, a second switch S2, a sixth resistor R6 and a third triode Q3;
when the new energy automobile starts and generates an electric signal, the VBUS2 pin of the charging seat is connected with the interface chip U1 through the TYPE-C USB data line, and the VBUS2 pin transmits the electric signal to the interface chip U1.
And S120, the vehicle-mounted connection circuit generates a starting signal for controlling a CD playing device in a CD playing system of the new energy automobile to start according to the electric signal and transmits the starting signal to the main control chip.
In an embodiment, the vehicle-mounted connection circuit generates a start signal for controlling a CD playing device in a CD playing system of a new energy automobile to start according to the electric signal, and transmits the start signal to a main control chip, and the method includes:
Converting a pin signal of the vehicle-mounted connection circuit based on the electric signal to obtain the starting signal;
and transmitting the starting signal to the main control chip.
In this embodiment, when the charging stand is started by the new energy automobile and generates an electrical signal, the VBUS2 pin of the charging stand is connected with the interface chip U1 through the TYPE-C USB data line, the VBUS2 pin transmits the electrical signal to the first resistor R1 and the first diode D1 through the interface chip U1, at this time, the electrical signal is reduced to +3.3v, then the reduced electrical signal +3.3v is transmitted to the ON pin of the first switch S1 to turn ON the first switch S1, the reduced electrical signal +3.3v is transmitted to the second resistor R2, the third resistor R3 and the base of the first transistor Q1 to make the first transistor Q1 be in a conducting state, the prst_n signal is converted from an original high potential to a 0 potential at this time, and the master chip acquires the prst_n signal from the 0 potential through the prst_n pin. Wherein the pin signal is the PRST_N signal generated by a PRST_N pin; the power-on signal is the PRST_N signal of 0 potential.
Through the embodiment, the pin signal of the vehicle-mounted connection circuit is converted based on the electric signal to obtain the starting signal; the starting-up signal is transmitted to the main control chip, so that subsequent targeted processing can be performed according to the starting-up signal.
And S130, the main control chip controls the CD playing device to start according to the starting signal and automatically switches to a CD playing vehicle-mounted mode.
In this embodiment, when the charging stand is started by the new energy automobile and generates an electrical signal, a VBUS2 pin of the charging stand is connected with the interface chip U1 through the TYPE-C USB data line, the VBUS2 pin transmits the electrical signal to the first resistor R1 and the first diode D1 through the interface chip U1, at this time, the electrical signal is reduced to +3.3v, then the reduced electrical signal +3.3v is transmitted to an ON pin of the first switch S1 to turn ON the first switch S1, the reduced electrical signal +3.3v is transmitted to the second resistor R2, the third resistor R3 and a base electrode of the first triode Q1, so that the first triode Q1 is in a conducting state, the prst_n signal is converted from an original high potential to a 0 potential at this time, and the master chip acquires the prst_n signal from the 0 potential through the prst_n pin, thereby realizing the reset of the device; the CD playing device is started under the control of the main control chip, and the main control chip controls the operation of other modules.
Meanwhile, the VBUS2 pin transmits the electrical signal to the first resistor R1 and the first diode D1 through the interface chip U1, at this time, the electrical signal is reduced to +3.3v, then the reduced electrical signal +3.3v is transmitted to the normally open end ON pin of the second switch S2 to turn ON the second switch S2, the reduced electrical signal +3.3v is transmitted to the base of the third triode Q3 through the second diode D2 to enable the third triode Q3 to be in a conducting state, the pc_08 signal of the pc_08 pin becomes a low potential, at this time, the master control chip determines that the CD playing device is in the CD playing vehicle-mounted mode, and automatically establishes wireless communication connection between the CD playing device and the audio equipment of the new energy automobile through the wireless communication connection module in the CD playing vehicle-mounted mode.
After the new energy automobile is flameout, the charging seat VBUS2 is closed, the normally open end of the second switch S2 is switched to the normally closed end, so that the third triode Q3 is in a cut-off state, the PC_08 signal of the PC_08 pin becomes high potential, and after the main control chip reads the change of the PC_08 pin, a shutdown prompt window can be popped up on a screen module of the CD playing device, and then the CD playing device is automatically shut down after 10 seconds.
S140, the wireless communication module establishes wireless communication connection with the sound equipment of the new energy automobile when the CD plays the vehicle-mounted mode.
In this embodiment, the CD playing device is automatically switched to the bluetooth input mode through the wireless communication connection module in the vehicle-mounted mode for playing the CD, so as to establish wireless communication connection between the CD playing device and the audio device of the new energy automobile. Wherein, the bluetooth input mode is a state that can receive a bluetooth signal of an automobile.
Specifically, the wireless communication module establishes wireless communication connection with the audio equipment of the new energy automobile when the CD plays the vehicle-mounted mode, and the wireless communication module may include: the wireless communication module acquires an automobile Bluetooth signal in a preset range; carrying out Bluetooth pairing connection on the automobile Bluetooth signals through a Bluetooth protocol to determine a connection result; if the connection result is that the connection is successful, a Bluetooth data channel is established between the CD playing device and the sound equipment of the new energy automobile; if the connection result is connection failure, a prompt that Bluetooth is not successfully connected can be sent to a display module of the CD playing device and/or a display module of the new energy automobile.
And S150, when the movement module reads the audio data in the CD playing vehicle-mounted mode, the audio data are sent to the sound equipment through the wireless communication module so as to be connected with the audio playing wireless communication.
In this embodiment, when the core module reads audio data in the CD playing vehicle-mounted mode, the audio data is sent to the audio device of the new energy automobile through the wireless communication module to perform audio playing wireless communication connection, which may include:
when the main control module determines the CD playing vehicle-mounted mode, the main control module sends a disc reading signal to the core assembly;
the machine core module acquires the disc reading signals and acquires the positions of the discs in the CD player based on the disc reading signals so as to determine the disc reading sequence;
the machine core module performs disc reading operation on each disc according to the disc reading sequence;
the movement module sequentially picks up the track of each disc and converts the track into the audio data signals respectively;
the core module sends the audio data to sound equipment of a new energy automobile based on the wireless communication module;
and the sound equipment performs playing operation based on the received audio data.
In this embodiment, the number of discs may be one or more.
In this embodiment, when the core module reads the audio data in the CD playing vehicle-mounted mode, the method further includes, after the audio data is sent to the audio device through the wireless communication module to perform audio playing wireless communication connection:
the steering wheel button of the new energy automobile sends a control signal to the main control chip through the wireless communication module;
the main control chip sends a corresponding switching signal to the movement module based on the control signal;
the core module acquires the corresponding audio data based on the switching signal and sends the audio data to the main control chip;
and the main control chip sends corresponding audio data to the sound equipment through the wireless communication module.
Therefore, the steering wheel button of the new energy automobile can realize the operation of switching the audio of the CD playing device, which effectively improves the operability of the method.
Through the implementation, when the new energy automobile is started and generates an electric signal, the charging seat transmits the electric signal to the vehicle-mounted connection circuit; the vehicle-mounted connection circuit generates the starting signal for controlling the CD playing device to start according to the electric signal and transmits the starting signal to the main control chip; the main control chip controls a CD playing device in a CD playing system of the new energy automobile to start and automatically switch to a CD playing vehicle-mounted mode according to the starting signal; the wireless communication module establishes wireless communication connection with sound equipment of the new energy automobile when the CD plays the vehicle-mounted mode; when the core module reads the audio data in the CD playing vehicle-mounted mode, the audio data are sent to the sound equipment of the new energy automobile through the wireless communication module to be connected with the audio playing wireless communication. Therefore, the automatic processes of starting up the CD playing device, switching the CD playing vehicle-mounted mode, establishing wireless communication connection with the sound equipment of the new energy automobile, and sending the audio data to the sound equipment for audio playing are realized, so that the automobile can be safely driven, the possibility of accident occurrence is reduced, and the driving safety is further improved.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (10)

1. The CD playing device for the new energy automobile is characterized by comprising a main control module, a core module and a wireless communication module; the movement module and the wireless communication module are connected with the main control module; the main control module is connected with a charging seat in the new energy automobile; the main control module comprises a main control chip and a vehicle-mounted connection circuit, wherein the vehicle-mounted connection circuit is connected with the charging seat, and the vehicle-mounted connection circuit is also connected with the main control chip;
the vehicle-mounted connection circuit is used for controlling the CD playing device for the new energy automobile to start up and automatically switch to a CD playing vehicle-mounted mode through the electric signal obtained from the charging seat after the new energy automobile is started;
The wireless communication module is used for establishing wireless communication connection with the sound equipment of the new energy automobile when the CD plays the vehicle-mounted mode;
and the movement module is used for sending the audio data to the sound equipment through the wireless communication module to play the audio when the audio data is read in the CD playing vehicle-mounted mode.
2. The device of claim 1, wherein the vehicle-mounted connection circuit comprises an interface chip, a first resistor, a first diode, a first switch, a second resistor, a third resistor, a fourth resistor, and a first triode;
the interface chip is connected with the VBUS2 pin of the charging seat and the first end of the first resistor; the normally open end of the first switch is connected with the second end of the first resistor and the positive electrode of the first diode; the common end of the first switch is connected with the first end of the second resistor; the second end of the second resistor is connected with the first end of the third resistor; the second end of the third resistor is connected with the base electrode of the first triode; the collector electrode of the first triode is connected with the second end of the fourth resistor and the PRST_N pin of the main control chip; the first end of the fourth resistor is connected with the charging seat.
3. The apparatus of claim 2, wherein the vehicle-mounted connection circuit further comprises a fifth resistor, a second diode, a second switch, a sixth resistor, and a third transistor;
the first end of the fifth resistor is connected with the charging seat, and the second end of the fifth resistor is connected with the PC08 pin of the main control chip and the collector electrode of the third triode; the base electrode of the third triode is connected with the cathode of the second diode and the first end of the sixth resistor; the positive electrode of the second diode is connected with the common end of the second switch; the normal open end of the second switch is connected with the second end of the first resistor and the positive electrode of the first diode.
4. The apparatus of claim 2, wherein the interface chip comprises an A4 pin, an A9 pin, a B4 pin, and a B9 pin, the A4 pin, the A9 pin, the B4 pin, and the B9 pin all being connected with a VBUS2 pin of the cradle.
5. A CD player system for a new energy vehicle, comprising: the charging seat of the new energy automobile and the CD playing device for the new energy automobile; the CD playing device comprises a main control module, a core module and a wireless communication module; the movement module and the wireless communication module are connected with the main control module; the main control module is connected with the charging seat; the main control module comprises a main control chip and a vehicle-mounted connection circuit, wherein the vehicle-mounted connection circuit is connected with the charging seat, and the vehicle-mounted connection circuit is also connected with the main control chip; the vehicle-mounted connection circuit is used for controlling the CD playing device to start up and automatically switch to a CD playing vehicle-mounted mode through an electric signal obtained from the charging seat after the new energy automobile is started; the wireless communication module is used for establishing wireless communication connection with the sound equipment of the new energy automobile when the CD plays the vehicle-mounted mode; and the movement module is used for sending the audio data to the sound equipment through the wireless communication module to play the audio when the audio data is read in the CD playing vehicle-mounted mode.
6. The system of claim 5, wherein the vehicle connection circuit comprises an interface chip, a first resistor, a first diode, a first switch, a second resistor, a third resistor, a fourth resistor, and a first triode;
the interface chip is connected with the VBUS2 pin of the charging seat and the first end of the first resistor; the normally open end of the first switch is connected with the second end of the second resistor and the positive electrode of the first diode; the common end of the first switch is connected with the first end of the second resistor; the second end of the second resistor is connected with the first end of the third resistor; the second end of the third resistor is connected with the base electrode of the first triode; the collector electrode of the first triode is connected with the second end of the fourth resistor and the PRST_N pin of the main control chip; the first end of the fourth resistor is connected with the charging seat.
7. The system of claim 6, wherein the vehicle connection circuit further comprises a fifth resistor, a second diode, a second switch, a sixth resistor, and a third transistor;
the first end of the fifth resistor is connected with the charging seat, and the second end of the fifth resistor is connected with the PC08 pin of the main control chip and the collector electrode of the third triode; the base electrode of the third triode is connected with the cathode of the second diode and the first end of the sixth resistor; the positive electrode of the second diode is connected with the common end of the second switch; the normal open end of the second switch is connected with the second end of the first resistor and the positive electrode of the first diode.
8. The system of claim 7, wherein the interface chip comprises an A4 pin, an A9 pin, a B4 pin, and a B9 pin, the A4 pin, the A9 pin, the B4 pin, and the B9 pin all being connected with a VBUS2 pin of the cradle.
9. A control method of a CD player system for a new energy automobile according to any one of claims 5 to 8, comprising:
when the charging seat starts a new energy automobile and generates an electric signal, the electric signal is transmitted to the vehicle-mounted connecting circuit;
the vehicle-mounted connection circuit generates a starting signal for controlling a CD playing device in a CD playing system of the new energy automobile to start according to the electric signal and transmits the starting signal to the main control chip;
the main control chip controls the CD playing device to start according to the starting signal and automatically switches to a CD playing vehicle-mounted mode;
the wireless communication module establishes wireless communication connection with sound equipment of the new energy automobile when the CD plays the vehicle-mounted mode;
when the movement module reads the audio data in the CD playing vehicle-mounted mode, the audio data are sent to the sound equipment through the wireless communication module to play the audio.
10. The method of claim 9, wherein the vehicle-mounted connection circuit generates a start-up signal for controlling a CD player in a CD playing system for a new energy automobile to start up according to the electrical signal, and transmits the start-up signal to a main control chip, and the method comprises:
converting a pin signal of the vehicle-mounted connection circuit based on the electric signal to obtain the starting signal;
and transmitting the starting signal to the main control chip.
CN202311825156.9A 2023-12-28 2023-12-28 CD playing device, playing system and control method for new energy automobile Pending CN117476046A (en)

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