Data diagnosis circuit and system of automobile diagnosis instrument

Abstract

The utility model discloses an automobile diagnostic instrument data diagnosis circuit and system, the automobile diagnostic instrument data diagnosis circuit comprises an OBD interface circuit, a CAN module and a main controller, the OBD interface circuit comprises an OBD interface connector, and the OBD interface connector is used for being connected with an automobile; the CAN module comprises a CAN transceiver, and the CAN transceiver is connected with the OBD interface connector; and the main controller is connected with the CAN transceiver so as to communicate with the automobile through the CAN transceiver, obtain the voltage and / or temperature information of the single battery of the automobile, carry out abnormal monitoring on the voltage and / or temperature of the single battery of the automobile and carry out corresponding fault diagnosis according to monitoring data. For example, when the voltage and / or temperature of the single battery of the automobile is diagnosed, a user can be reminded in time, so that the user can handle in time, and the safety of the automobile and personnel is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile fault diagnosis, especially relates to a car diagnostic instrument data diagnosis circuit and system. BACKGROUND

[0002] In a new energy vehicle, a battery pack is composed of multiple single batteries (commonly known as battery cores) combined in series or parallel. Voltage difference is the difference between the maximum and minimum single battery voltages in the battery pack at the same time. Voltage difference is extremely important in new energy vehicles, and needs to ensure performance and safety. The smaller the voltage difference, the more stable the work efficiency and performance. Excessive voltage difference leads to overcharging or overdischarging of some batteries, which may cause battery thermal runaway, shorten battery life, and even cause a fire.

[0003] Therefore, in order to ensure the safety of the vehicle and the personnel, the state of the single battery needs to be monitored in real time. SUMMARY

[0004] The utility model aims at at least in a certain extent solves one of the technical problems in the prior art. To this end, one purpose of the utility model is to provide a car diagnostic instrument data diagnosis circuit.

[0005] In one aspect, to achieve the above-mentioned purpose, according to the car diagnostic instrument data diagnosis circuit of the utility model embodiment, it comprises:

[0006] An OBD interface circuit, the OBD interface circuit comprises an OBD interface connector, and the OBD interface connector is used to connect with the automobile;

[0007] A CAN module, the CAN module comprises a CAN transceiver, and the CAN transceiver is connected with the OBD interface connector;

[0008] A main controller, the main controller is connected with the CAN transceiver, so as to communicate with the automobile through the CAN transceiver, and obtain the voltage and / or temperature information of the single battery of the automobile, so as to monitor the voltage and / or temperature of the single battery of the automobile.

[0009] Further, according to one embodiment of the utility model, the car diagnostic instrument data diagnosis circuit further comprises:

[0010] A voice module, the voice module is connected with the main controller, so as to output the audio signal to the loudspeaker for playing under the control of the main controller;

[0011] A power amplification circuit, the voice module is connected with the loudspeaker through the power amplification circuit, so as to output the voice signal output by the voice module to the loudspeaker for playing after power amplification.

[0012] Further, according to one embodiment of the utility model, the power amplifier circuit comprises:

[0013] The in-phase input end of the audio amplifier is connected with reference ground through the first capacitor C111, the anti-phase input end of the audio amplifier is connected with one end of the second capacitor C115 through the first resistor R117, the other end of the second capacitor C115 is connected with the signal output end of the voice module, the anti-phase input end of the audio amplifier is also connected with the first voice signal output end of the audio amplifier through the second resistor R118, the first voice signal output end is also connected with the first audio signal input end of the loudspeaker, and the second voice signal output end of the audio amplifier is connected with the second audio signal input end of the loudspeaker.

[0014] Further, according to one embodiment of the utility model, the power amplifier circuit further comprises:

[0015] The amplifier setting circuit is connected with the control end of the voice module and the enable end of the audio amplifier respectively, so as to control the voice power amplification output of the audio amplifier under the control of the voice module.

[0016] Further, according to one embodiment of the utility model, the amplifier setting circuit comprises:

[0017] One end of the third resistor R115 is connected with the control end of the voice module, and the other end of the third resistor R115 is connected with the enable end of the audio amplifier, so as to limit the current between the audio amplifier and the voice module;

[0018] One end of the fourth resistor R148 is connected with the enable end of the audio amplifier, and the other end of the fourth resistor R148 is connected with reference ground, so as to control the enable of the audio amplifier under the control of the voice module.

[0019] Further, according to one embodiment of the utility model, the automobile diagnostic instrument data diagnosis circuit further comprises:

[0020] The K line module comprises a K line controller, the K line controller is connected with the main controller and the OBD interface circuit respectively, the main controller communicates with the automobile through the K line module to collect automobile data.

[0021] Further, according to one embodiment of the utility model, the automobile diagnostic instrument data diagnosis circuit further comprises:

[0022] A WIFI communication module is connected with the main controller, and the WIFI communication module is used for wireless communication connection with a diagnostic instrument display control terminal.

[0023] Further, according to an embodiment of the present application, the automobile diagnostic instrument data diagnosis circuit further comprises a 4G communication module, the 4G communication module is connected with the main controller, and the 4G communication module is used for wireless communication connection with a diagnostic instrument display control terminal and / or a remote server.

[0024] A 4G communication controller;

[0025] An eSIM patch circuit, the eSIM patch circuit is connected with the 4G communication controller, and the 4G communication controller is used for acquiring communication authentication information through the eSIM patch circuit;

[0026] A power supply control circuit, the power supply control circuit is connected with a control end of the main controller and a power supply end of the 4G communication controller respectively, so as to control the power supply of the 4G communication controller to be disconnected or connected.

[0027] Further, according to an embodiment of the present application, the automobile diagnostic instrument data diagnosis circuit further comprises:

[0028] A monitoring module, the monitoring module comprises an acceleration sensor, the acceleration sensor is connected with the main controller, so as to transmit collected motion information to the main controller, and any one or more of dangerous driving, power supply control or anti-theft alarm is controlled according to the collected motion information through the controller.

[0029] Further, according to an embodiment of the present application, the automobile diagnostic instrument data diagnosis circuit further comprises:

[0030] A memory module, the memory module comprises a memory, the memory is connected with the main controller, so as to locally store data of the memory.

[0031] On the other hand, the embodiment of the present application also provides an automobile diagnostic system, further comprising:

[0032] The automobile diagnostic instrument data diagnosis circuit described above;

[0033] The diagnostic instrument display control terminal is connected with the automobile diagnostic instrument data diagnosis circuit, and is used for acquiring voltage and / or temperature information of the automobile single battery through the automobile diagnostic instrument data diagnosis circuit, and performing fault diagnosis.

[0034] The remote server is connected with the automobile diagnostic instrument data diagnosis circuit and / or diagnostic instrument display control terminal, so as to acquire voltage and / or temperature information of the automobile single battery through the automobile diagnostic instrument data diagnosis circuit and / or diagnostic instrument display control terminal, and push voltage and / or temperature abnormal information of the automobile single battery to the client.

[0035] The automobile diagnostic instrument data diagnosis circuit provided by the embodiment of the utility model, through OBD interface circuit including an OBD interface connector, the OBD interface connector is used for connecting with the car;CAN module includes a CAN transceiver, the CAN transceiver is connected with the OBD interface connector;Main controller is connected with the CAN transceiver, to communicate with the car through the CAN transceiver, and acquire the voltage and / or temperature information of the automobile single battery, to carry out abnormal monitoring to the voltage and / or temperature of the automobile single battery, and according to the monitoring data, corresponding fault diagnosis is carried out.For example, when detecting the voltage and / or temperature of the automobile single battery, the user can be reminded in time, so as to facilitate the user to handle in time, so as to guarantee the safety of the car and personnel. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The automobile diagnostic instrument data diagnosis circuit provided by the utility model provides the structure block diagram of automobile diagnostic instrument data diagnosis circuit;

[0037] Figure 2 The main controller circuit structure schematic diagram provided by the utility model provides the main controller circuit structure schematic diagram;

[0038] Figure 3 The speech module and power amplification circuit structure schematic diagram provided by the utility model provide the speech module and power amplification circuit structure schematic diagram;

[0039] Figure 4 The CAN module circuit structure schematic diagram provided by the utility model provides the CAN module circuit structure schematic diagram;

[0040] Figure 5 The OBD interface circuit structure schematic diagram provided by the utility model provides the OBD interface circuit structure schematic diagram;

[0041] Figure 6 The K line module circuit structure schematic diagram provided by the utility model provides the K line module circuit structure schematic diagram;

[0042] Figure 7 The WIFI communication module circuit structure schematic diagram provided by the utility model provides the WIFI communication module circuit structure schematic diagram;

[0043] Figure 8 The 4G communication module circuit structure schematic diagram provided by the utility model;

[0044] Figure 9 The monitoring module circuit structure schematic diagram provided by the utility model;

[0045] Figure 10 The memory module circuit structure schematic diagram provided by the utility model;

[0046] Figure 11 The use state reference structure schematic diagram of the zero-gravity seat provided by the utility model.

[0047] The utility model realizes the purpose, function characteristics and advantages, which will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0048] In order to make the personnel in the art better understand the utility model scheme, the technical scheme in the utility model embodiment will be described clearly and completely in the utility model embodiment in combination with the drawings. Unless otherwise defined, all technical and scientific terms used in the text are the same as the meanings understood by the person skilled in the art belonging to the technical field of the utility model. The terms used in the specification of the utility model in the text are only for the purpose of describing the specific embodiments, not for the purpose of limiting the utility model.

[0049] In the text, the reference to "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be contained in at least one embodiment of the utility model. The appearance of the phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. The person skilled in the art explicitly and implicitly understands that the embodiments described in the text can be combined with other embodiments.

[0050] Referring to Figures 1 to 5 The utility model embodiment provides a kind of automobile diagnostic instrument data diagnosis circuit, comprising: OBD interface circuit, CAN module and main controller, the OBD interface circuit includes an OBD interface connector J13, the OBD interface connector is used to connect with automobile;The CAN module includes a CAN transceiver, the CAN transceiver is connected with the OBD interface connector;The main controller is connected with the CAN transceiver, to communicate with automobile by the CAN transceiver, and obtain the voltage and / or temperature information of automobile monomer battery, to carry out abnormal monitoring to the voltage and / or temperature of automobile monomer battery.

[0051] Specifically, as Figure 1 And Figure 5As shown, the OBD interface connector J13 of the OBD interface circuit can be electrically connected to the vehicle. In this way, the main controller can communicate with the vehicle's control unit via the CAN module and acquire the vehicle's status information through the vehicle's control unit. In one embodiment of this invention, two CAN modules may be included. Figure 4 As shown, the CAN module includes a CAN transceiver U18, which communicates with the main controller U6 via a serial port. The CAN transceiver U18 is also connected to the OBD interface connector J13 via a CAN signal line. The main controller U6 can communicate with the vehicle's control unit through the CAN transceiver U18 and transmit the collected vehicle status information to a display control terminal for display, enabling fault diagnosis of the vehicle. Specifically, the CAN module can acquire the voltage and / or temperature information of individual vehicle batteries and output this information to the display control terminal or a remote server for anomaly monitoring of individual battery voltage and / or temperature, and perform corresponding fault diagnosis based on the monitoring data. For example, when abnormal voltage and / or temperature occur in individual vehicle batteries, the system can promptly alert the user, allowing for timely intervention and ensuring the safety of the vehicle and its occupants.

[0052] See Figure 1 and Figure 3 The automotive diagnostic tool's data diagnostic circuit further includes a voice module and a power amplifier circuit. The voice module is connected to the main controller to output audio signals to a speaker for playback under the control of the main controller. During use, the voice module can output audio signals to the speaker for playback under the control of the main controller to provide sound signal prompts, allowing the user to easily obtain the current operating status of the main controller. Thus, the user can obtain the current operating status of the automotive diagnostic tool's data diagnostic circuit in real time based on the speaker's sound prompts, making it more convenient to use. For example, the speaker can broadcast fault codes and provide alarm sound prompts, such as a beeping sound to indicate a fault, allowing the user to obtain fault information.

[0053] like Figure 2 and Figure 3 As shown, the main controller U6 communicates with the voice module via the PB15_SINGLE_WIRE signal terminal to control the playback of voice messages by the voice module U16. For example, it can play abnormal signals of vehicle battery cell voltage and temperature as needed to alert the user.

[0054] The voice module U16 is connected with the speaker through the power amplification circuit, so as to output the voice signal output by the voice module U16 to the speaker for playing after power amplification. Since the power of the audio signal output by the voice module U16 is relatively small, it may not meet the application requirement. The power amplification circuit can amplify the audio signal output by the voice module U16 and then output, so as to meet the actual application requirement.

[0055] As shown in Figure 3 The power amplification circuit includes an audio amplifier U17, the non-inverting input terminal of the audio amplifier U17 is connected with the reference ground through a first capacitor C111, the inverting input terminal of the audio amplifier U17 is connected with one end of a second capacitor C115 through a first resistor R117, the other end of the second capacitor C115 is connected with the signal output terminal of the voice module U16, the inverting input terminal of the audio amplifier U17 is also connected with the first voice signal output terminal of the audio amplifier U17 through a second resistor R118, the first voice signal output terminal is also connected with the first audio signal input terminal of the speaker, and the second voice signal output terminal of the audio amplifier U17 is connected with the second audio signal input terminal of the speaker. The first capacitor C111 and the second capacitor C115 are used for isolating the direct current signal, so as to select the output of the audio signal. The audio amplifier U17, the second resistor R118 and the first resistor R117 form a power amplification circuit, which can amplify the audio signal output by the voice module U16 through the DAC signal terminal, output the audio signal to the first audio signal input terminal of the speaker through the VO1 signal terminal, and output another audio signal to the second audio signal input terminal of the speaker through the second voice signal output terminal of the audio amplifier U17. The audio signals output by the first voice signal output terminal and the second voice signal output terminal of the audio amplifier U17 can be differential signals, so as to drive the speaker to emit sound.

[0056] Referring to Figure 3 The power amplification circuit further includes an amplifier setting circuit, which is connected with the control terminal of the voice module U16 and the enable terminal of the audio amplifier, so as to control the audio amplifier to perform voice power amplification output under the control of the voice module U16. When the voice module U16 has no audio signal output, the audio amplifier U17 does not need to amplify and output the signal at the input terminal, so as to reduce the generation of noise. That is, when the voice module U16 has voice signal output, the audio amplifier U17 needs to control the power amplification output of the audio signal.

[0057] As shown in Figure 3As shown in the middle, the amplifier setting circuit includes: a third resistor R115 and a fourth resistor R148, one end of the third resistor R115 is connected with the controlled end of the voice module U16, the other end of the third resistor R115 is connected with the enable end of the audio amplifier U17, and the third resistor (R115) is used for current limiting between the audio amplifier and the voice module; in this way, when the audio amplifier U17 is damaged, R115 can play a current limiting role. Protect the voice module U16 from being damaged. One end of the fourth resistor R148 is connected with the enable end of the audio amplifier U17, and the other end of the fourth resistor R148 is connected with the reference ground, so as to enable the control of the audio amplifier U17 under the control of the voice module U16. The enable end of the audio amplifier U17 can be pulled down to a low level state through the fourth resistor R148, so that the audio amplifier U17 defaults to an off state. When the voice module U16 outputs a voice signal, a high level signal can be output through the third resistor R115 to the enable end of the audio amplifier U17, so as to control the audio amplifier U17 to output the audio signal to the loudspeaker after power amplification. In this way, when the car is not started, the voice module U16 can control the audio amplifier U17 to be closed. The audio amplifier U17 is not enabled, reducing power consumption and misoperation.

[0058] Referring to Figure 1 , Figure 5 and Figure 6 , the automobile diagnostic instrument data diagnosis circuit further includes a K-line module, the K-line module includes a K-line controller, the K-line controller is connected with the main controller U6 and the OBD interface circuit respectively, and the main controller U6 communicates with the automobile through the K-line module to collect automobile data. As shown in Figure 6 , the K-line module can include a K-line signal controller U20, the K-line signal controller U20 is in communication connection between the main controller U6 through the serial port, and the K-line signal controller U20 is connected with the OBD interface connector J13 through the K signal line K_LINE. In this way, the main controller U6 can communicate with the control unit of the automobile through the K-line signal controller U20 to collect data of the automobile. That is, the main controller U6 can collect data of the automobile through the CAN bus or the K bus. At the same time, the K line is a general signal line of the automobile, which can support more vehicle models.

[0059] Referring to Figure 1 , Figure 2 and Figure 7The automobile diagnostic instrument data diagnosis circuit further comprises a WIFI communication module connected with the main controller, and the WIFI communication module is used for wireless communication connection with a diagnostic instrument display control terminal. Figure 2 As shown in FIG. 15, the main controller U6 is internally provided with a Bluetooth transceiver module. In this way, the main controller U6 can be connected with a display control diagnostic instrument through Bluetooth communication. In this way, the collected automobile data can be transmitted to the diagnostic instrument display control terminal through Bluetooth, and the data can be displayed and the automobile fault can be diagnosed through the diagnostic instrument display control terminal. In addition, in some embodiments, the WIFI communication module can also be connected with the display control diagnostic instrument through WIFI wireless communication. In this way, the collected automobile data can be transmitted to the diagnostic instrument display control terminal through WIFI, and the data can be displayed and the automobile fault can be diagnosed through the diagnostic instrument display control terminal. Figure 7 As shown in FIG. 15, the WIFI communication module comprises a WIFI controller U13 connected with an antenna interface J8 through a filter circuit composed of a capacitor C89, an inductor L5 and a capacitor C88, and the antenna interface J8 is used for connecting a wireless signal transceiving antenna, so as to realize the transceiving of wireless signals.

[0060] Referring to FIGS. 16 and 17, Figure 1 and Figure 8 The automobile diagnostic instrument data diagnosis circuit further comprises a 4G communication module connected with the main controller, and the 4G communication module is used for wireless communication connection with a diagnostic instrument display control terminal and / or a remote server; the 4G communication module comprises a 4G communication controller U9, an eSIM patch circuit and a power supply control circuit, the eSIM patch circuit is connected with the 4G communication controller, and the 4G communication controller U9 is used for obtaining communication authentication information through the eSIM patch circuit; by adopting a patch mode, the stability is higher than that of a slot mode.

[0061] The power supply control circuit is connected with a control end of the main controller and a power supply end of the 4G communication controller U9, so as to control the power supply of the 4G communication controller U9 to be disconnected or connected. As shown in FIG. 18, Figure 8As shown, in some embodiments, the device can also wirelessly connect to the display control diagnostic tool via a 4G communication module. This allows the collected vehicle data to be transmitted to the diagnostic tool's display control terminal via 4G communication, where the data can be displayed and vehicle faults diagnosed. Additionally, the collected vehicle data can be transmitted to a remote server via the 4G communication module for data storage or fault diagnosis. The eSIM patch circuit includes a USIM card slot (EISN), through which a communication authentication information card can be inserted. Thus, the 4G communication controller U9 can obtain communication authentication information and achieve wireless communication via the eSIM patch circuit. Since the 4G communication module consumes relatively much power during communication, the power supply control circuit can control the power supply to the 4G communication controller U9 to reduce power consumption and save energy. Figure 8 As shown, the power supply control circuit includes a transistor Q11 and a MOSFET Q10. The base of transistor Q11 is connected to a control terminal of the main controller U6 through a resistor R80. The emitter of transistor Q11 is connected to a reference ground. The collector of transistor Q11 is connected to the gate of MOSFET Q10. The gate of MOSFET Q10 is also connected to the source of MOSFET Q10 through a resistor R75. The source of MOSFET Q10 is also connected to the power supply VCC_4V. The drain of MOSFET Q10 is connected to the power supply terminal of the 4G communication controller U9. When the main controller U6 outputs a high-level signal to the base of transistor Q11, transistor Q11 is turned on, and the gate of MOSFET Q10 is pulled down to a low-level signal, thus turning on MOSFET Q10 and outputting the power supply VCC_4V to the power supply terminal of the 4G communication controller U9, supplying power to the 4G communication controller U9. When it is necessary to disconnect the power supply to the 4G communication controller U9, the main controller U6 outputs a low-level signal to the base of transistor Q11, thereby turning off both transistor Q11 and MOSFET Q10, reducing the power consumption of the 4G communication controller U9. The 4G communication controller U9 is connected to the antenna interface J15 through a filter circuit composed of capacitor C61, resistor R74, and capacitor C62. The antenna interface J15 is used to connect the wireless signal transceiver antenna to realize the transmission and reception of wireless signals. The 4G communication controller U9 is also connected to the main controller U6 through a reset circuit composed of transistor Q9. Under the control of the main controller U6, a restart and reset can be performed. The 4G communication controller U9 is also connected to the main controller U6 via an interface communication circuit to realize data communication between the 4G communication controller U9 and the main controller U6.

[0062] See Figure 1 andFigure 9 The automobile diagnostic instrument data diagnosis circuit further comprises a monitoring module, the monitoring module comprises an acceleration sensor, the acceleration sensor is connected with the main controller to transmit collected motion information to the main controller, and any one or more of dangerous driving, power supply control or anti-theft alarm is controlled according to the collected motion information through the controller. In this way, when the automobile diagnostic instrument data diagnosis circuit is plugged into the automobile, the motion trajectory data of the automobile can be collected and transmitted to the client or the server through the network. In this way, dangerous driving behaviors such as sudden acceleration and sudden deceleration can be detected and reminded. At the same time, the power supply can be turned off when there is no motion to reduce power consumption. In addition, when vibration is detected, an anti-theft alarm function is realized.

[0063] Referring to Figure 1 and Figure 10 The automobile diagnostic instrument data diagnosis circuit further comprises a memory module, the memory module comprises a memory, and the memory is connected with the main controller to locally store data of the memory. As shown in Figure 10 , various data collected or generated by the main controller can be stored through the memory module. When the network is not smooth, the memory can also be used as a temporary storage space for data to avoid data loss.

[0064] On the other hand, referring to Figure 11 , the embodiment of the present application also provides an automobile diagnostic system, further comprising the automobile diagnostic instrument data diagnosis circuit, the diagnostic instrument display control terminal and the remote server, the diagnostic instrument display control terminal is in communication connection with the automobile diagnostic instrument data diagnosis circuit, and the diagnostic instrument display control terminal is used to acquire voltage and / or temperature information of the automobile single battery through the automobile diagnostic instrument data diagnosis circuit and perform fault diagnosis. The remote server is in communication connection with the automobile diagnostic instrument data diagnosis circuit and / or the diagnostic instrument display control terminal, so as to acquire the voltage and / or temperature information of the automobile single battery through the automobile diagnostic instrument data diagnosis circuit and / or the diagnostic instrument display control terminal, and push the voltage and / or temperature abnormal information of the automobile single battery to the client. In this way, when the voltage and / or temperature of the automobile single battery appears abnormal, the user can be reminded in time to facilitate the user to handle in time, so as to ensure the safety of the automobile and the personnel.

[0065] The above are only embodiments of the present application, but do not limit the patent range of the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing specific embodiments, or equivalently replace part of the technical features. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly used in other related technical fields, are also within the protection scope of the present application.

[0066] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments without departing from the principles and purposes of the present application within the scope of the present application.

Claims

1. An automobile diagnosis apparatus data diagnosis circuit, characterized by comprising: The application relates to an OBD interface circuit, a CAN module, a main controller, a voice module, a power amplification circuit and a K-line module. The OBD interface circuit comprises an OBD interface connector for connecting with a vehicle; The CAN module comprises a CAN transceiver connected with the OBD interface connector; The main controller is connected with the CAN transceiver to communicate with the vehicle through the CAN transceiver and acquire voltage and / or temperature information of a single battery of the vehicle to monitor the voltage and / or temperature of the single battery of the vehicle. The voice module is connected with the main controller to output an audio signal under the control of the main controller; The power amplification circuit is used for power amplifying the voice signal output by the voice module and outputting the voice signal to a loudspeaker for playing; The power amplification circuit comprises an audio amplifier, a first capacitor (C111), a first resistor (R117), a second capacitor (C115), a second resistor (R118), a first voice signal output end and a second voice signal output end. The audio amplifier is connected with the reference ground through the first capacitor (C111), the non-inverting input end of the audio amplifier is connected with one end of the second capacitor (C115) through the first resistor (R117), the other end of the second capacitor (C115) is connected with a signal output end of the voice module, the non-inverting input end of the audio amplifier is also connected with the first voice signal output end of the audio amplifier through the second resistor (R118), the first voice signal output end is also connected with a first audio signal input end of the loudspeaker, and the second voice signal output end of the audio amplifier is connected with a second audio signal input end of the loudspeaker. The power amplification circuit further comprises an amplifier setting circuit connected with a control end of the voice module and an enable end of the audio amplifier to control the voice power amplification output of the audio amplifier under the control of the voice module. The amplifier setting circuit comprises a third resistor (R115) and a fourth resistor (R148). One end of the third resistor (R115) is connected with the control end of the voice module, the other end of the third resistor (R115) is connected with the enable end of the audio amplifier, and the third resistor (R115) is used for limiting the current between the audio amplifier and the voice module.

2. The automobile diagnosis instrument data diagnosis circuit according to claim 1, characterized in that, One end of the fourth resistor (R148) is connected with the enable end of the audio amplifier, and the other end of the fourth resistor (R148) is connected with the reference ground to enable the control of the audio amplifier under the control of the voice module. The K-line module comprises a K-line controller connected with the main controller and the OBD interface circuit. The main controller communicates with the vehicle through the K-line module to collect vehicle data.

3. The automobile diagnosis instrument data diagnosis circuit according to claim 1, characterized in that, ​ ​ 4. The automobile diagnosis instrument data diagnosis circuit according to claim 1, characterized in that, ​ A WIFI communication module is connected with the main controller, and the WIFI communication module is used for wireless communication connection with a diagnostic instrument display control terminal; wherein the main controller is a built-in Bluetooth transceiver module, and the Bluetooth transceiver module is used for wireless communication connection with the diagnostic instrument display control terminal.

5. The automobile diagnostic instrument data diagnostic circuit according to claim 4, wherein, Further comprising a 4G communication module, the 4G communication module is connected with the main controller, the 4G communication module is used for wireless communication connection with the diagnostic instrument display control terminal and / or remote server; the 4G communication module comprises: 4G communication controller; eSIM patch circuit, the eSIM patch circuit is connected with the 4G communication controller, the 4G communication controller is used for obtaining communication authentication information through the eSIM patch circuit; The power supply control circuit is connected with the control end of the main controller and the power supply end of the 4G communication controller respectively, so as to control the power supply of the 4G communication controller.

6. The automobile diagnosis instrument data diagnosis circuit according to claim 1, characterized in that, Further comprising: A monitoring module, the monitoring module comprises an acceleration sensor, the acceleration sensor is connected with the main controller, so as to transmit the collected motion information to the main controller, and any one or more of dangerous driving, power supply control or anti-theft alarm is controlled according to the collected motion information through the controller.

7. An automobile diagnosis system characterized by comprising: Further comprising: The automobile diagnostic instrument data diagnosis circuit of any one of claims 1 to 6; A diagnostic instrument display control terminal is connected with the automobile diagnostic instrument data diagnosis circuit, and the diagnostic instrument display control terminal is used for obtaining voltage and / or temperature information of the automobile single battery through the automobile diagnostic instrument data diagnosis circuit, and performing fault diagnosis; A remote server is connected with the automobile diagnostic instrument data diagnosis circuit and / or diagnostic instrument display control terminal, so as to obtain voltage and / or temperature information of the automobile single battery through the automobile diagnostic instrument data diagnosis circuit and / or diagnostic instrument display control terminal, and push the voltage and / or temperature abnormal information of the automobile single battery to the client.

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