Electric vehicle positioning circuit

Abstract

The utility model provides a kind of electric vehicle positioning circuit, comprising: main control subcircuit, for controlling subcircuit operation and data processing;Beidou positioning subcircuit is used to output accurate positioning information;SIM card communication subcircuit is used to send positioning information to cloud server;RS485 communication interface subcircuit is used to convert cloud data into differential signal input main control subcircuit;Electric quantity acquisition subcircuit is used to adapt the input voltage of 0-100V range;Acceleration sensing subcircuit is used to detect motion signal and send to main control subcircuit;Power input conversion subcircuit is connected with external power supply, for converting input voltage to 4.2V;Controller interface subcircuit is used to direct corresponding subcircuit respectively with external signal, power and data, so, the utility model realizes the overall monitoring of new national standard demand data, and design is simple, greatly reduces cost.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle positioning technology, specifically to an electric vehicle positioning circuit. Background Technology

[0002] In existing technologies, the positioning circuit designs commonly used in shared electric vehicles are typically quite complex to meet continuous monitoring and various management needs. These solutions often integrate multiple types of sensors (such as vibration sensors and temperature detectors), support remote power-off, electronic fences, and trajectory playback, and rely on 4G communication cards for bidirectional data transmission. This not only increases hardware costs (such as the module itself and ongoing communication service fees) but also negatively impacts the electric vehicle's range due to high system power consumption. Furthermore, under the new national standard requirements, electric vehicles need to be equipped with corresponding circuits, but the current technology struggles to meet the urgent needs for cost control and easy installation within the framework of the new standard. Utility Model Content

[0003] This invention was developed to solve the above-mentioned problems, and its purpose is to provide an electric vehicle positioning circuit.

[0004] This utility model provides an electric vehicle positioning circuit, characterized by the following features: a main control sub-circuit for controlling the operation of sub-circuits and data processing; a Beidou positioning sub-circuit connected to the main control sub-circuit for receiving and processing satellite signals and outputting accurate positioning information; a SIM card communication sub-circuit connected to the main control sub-circuit for sending positioning information to a cloud server; an RS485 communication interface sub-circuit connected to the main control sub-circuit for converting cloud data into differential signals for inputting to the main control sub-circuit; a power acquisition sub-circuit connected to the main control sub-circuit for adapting to input voltages ranging from 0-100V; an acceleration sensing sub-circuit connected to the main control sub-circuit for detecting motion signals and sending them to the main control sub-circuit; a power input conversion sub-circuit connected to an external power supply for converting the input voltage to 4.2V; and a controller interface sub-circuit connected to the RS485 communication interface sub-circuit, the power acquisition sub-circuit, and the power input conversion sub-circuit respectively, for directing external signals, power, and data to their respective sub-circuits.

[0005] The electric vehicle positioning circuit provided by this utility model may also have the following feature: the main control sub-circuit includes: a first control chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first resistor, a second resistor, a third resistor, a first inductor, a second inductor, and a second control chip.

[0006] The first, second, third, fourth, fifth, and sixth capacitors are all connected at their first terminals to pins 42 and 43 of the first control chip, and their second terminals are grounded. The first terminal of the seventh capacitor is connected to pin 15 of the first control chip, and its second terminal is grounded. The first terminal of the eighth capacitor is connected to pin 35 of the first control chip, and its second terminal is grounded. The first terminal of the first resistor is connected to the second terminal of the eighth capacitor, and its second terminal is grounded. The first terminal of the ninth capacitor is connected to the second terminal of the first resistor, and its second terminal is grounded. The first terminals of the first inductor, the second inductor, and the second resistor are respectively connected to the second terminal of the first resistor, and their second terminals are respectively connected to the second control chip. The first terminal of the third resistor is connected to pin 7 of the first control chip, and its second terminal is grounded.

[0007] The electric vehicle positioning circuit provided by this utility model may also have the following features: the Beidou positioning sub-circuit includes: a third control chip, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a first MOSFET, a second MOSFET, a third inductor, a fourth inductor, and a fifth inductor; the tenth, twelfth, thirteenth, and twenty-fourth pins of the third control chip are grounded.

[0008] The eleventh pin of the third control chip is connected to the first terminal of the eleventh capacitor and the first terminal of the fourth resistor. The second terminal of the fourth resistor is connected to the first terminals of the twelfth and thirteenth capacitors. The second terminals of the eleventh and twelfth capacitors are both grounded. The first terminals of the third, fourth, and fifth inductors are all connected to the second terminal of the thirteenth capacitor. The second terminal of the third inductor is grounded. The second terminal of the fourth inductor is connected to the external interface ANT1. The second terminal of the fifth inductor is connected to the external interface ANT2. The drain of the first MOSFET is connected to the twentieth pin of the third control chip, the source is connected to the twenty-eighth pin of the first control chip, and the gate is connected to a 1.8V DC power supply. The drain of the second MOSFET is connected to the twenty-first pin of the third control chip, the source is connected to the twenty-ninth pin of the first control chip, and the gate is connected to a 1.8V DC power supply.

[0009] The first end of the fifth resistor is connected to the twenty-eighth pin of the first control chip, and the second end is connected to the 1.8V DC power supply. The first end of the sixth resistor is connected to the twenty-ninth pin of the first control chip, and the second end is connected to the 3.3V DC power supply. The first end of the fourteenth capacitor is connected to both the 3.3V DC power supply and the twenty-third pin of the third control chip, and the second end is grounded.

[0010] The electric vehicle positioning circuit provided by this utility model may also include: a signal adapter sub-circuit, connected to the main control sub-circuit, used to convert external signals into signals recognizable by the main control sub-circuit. The signal adapter sub-circuit includes: a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a third MOSFET, a first transistor, a first Schottky diode, the cathode of the first Schottky diode, the first terminal of the seventh resistor, the first terminal of the eighth resistor, the first terminal of the ninth resistor, and the first terminal of the fifteenth capacitor, all connected to an external signal interface. The anode of the first Schottky diode and the second terminal of the seventh resistor... The first transistor's base is connected to the gate of the third MOSFET, the second terminal of the fifteenth capacitor is grounded, the second terminal of the eighth resistor is connected to a 4.3V DC power supply, the second terminal of the ninth resistor and the first terminal of the sixteenth capacitor are both connected to the gate of the third MOSFET, the source of the third MOSFET and the second terminal of the sixteenth capacitor are both grounded, the first terminal of the tenth resistor and the first terminal of the eleventh resistor are both connected to the drain of the third MOSFET, the second terminal of the tenth resistor is connected to a 1.8V DC power supply, the base of the first transistor is connected to the second terminal of the eleventh resistor, and the emitter is grounded, the first terminal of the twelfth resistor, the first terminal of the seventeenth capacitor, and the collector of the first transistor are all connected to the sixteenth pin of the first control chip, and the second terminal of the twelfth resistor is connected to a 1.8V DC power supply.

[0011] The electric vehicle positioning circuit provided by this utility model may also have the following features: the power acquisition sub-circuit includes a thirteenth resistor, a fourteenth resistor, and an eighteenth capacitor. The first ends of the thirteenth resistor, the fourteenth resistor, and the eighteenth capacitor are all connected to the ninth pin of the first control chip. The second end of the thirteenth resistor is connected to a 48V DC power supply. The second ends of the fourteenth resistor and the eighteenth capacitor are both grounded.

[0012] The electric vehicle positioning circuit provided by this utility model may also include the following feature: an external power supply interruption detection sub-circuit, connected to the main control sub-circuit, used to detect whether the external power supply is in a power supply state. The external power supply interruption detection sub-circuit includes: a nineteenth capacitor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, and a fourth MOSFET. The first terminal of the nineteenth capacitor, the first terminal of the fifteenth resistor, and the drain of the fourth MOSFET are all connected to the eighty-seventh pin of the first control chip. The second terminal of the nineteenth capacitor and the source of the fourth MOSFET are both grounded. The second terminal of the fifteenth resistor is connected to a 1.8V DC power supply. The first terminal of the sixteenth resistor is connected to the gate of the fourth MOSFET, and the second terminal is connected to the first terminals of the seventeenth and eighteenth resistors respectively. The second terminal of the seventeenth resistor is connected to a 48V DC power supply, and the second terminal of the eighteenth resistor is grounded.

[0013] The electric vehicle positioning circuit provided by this utility model may also include the following feature: an ACC signal acquisition sub-circuit, connected to the main control sub-circuit, used to detect whether there is an ACC signal input. The ACC signal acquisition sub-circuit includes: a twentieth capacitor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, and a fifth MOSFET. The first end of the twentieth capacitor, the first end of the nineteenth resistor, and the drain of the fifth MOSFET are all connected to the eighty-first pin of the first control chip. The second end of the twentieth capacitor and the source of the fifth MOSFET are both grounded. The second end of the nineteenth resistor is connected to a 1.8V DC power supply. The first end of the twentieth resistor is connected to the gate of the fifth MOSFET, and the second end is connected to the first end of the twenty-first and twenty-second resistors respectively. The second end of the twenty-first resistor is connected to the ACC input interface, and the second end of the twenty-second resistor is grounded.

[0014] The electric vehicle positioning circuit provided by this utility model may also have the following features, wherein the acceleration sensing sub-circuit includes: a fourth control chip, a twenty-first capacitor, a twenty-second capacitor, a twenty-third capacitor, a twenty-third resistor, a twenty-fourth resistor, and a twenty-fifth resistor. The eighth and ninth pins of the fourth control chip are grounded, the fifth pin is connected to the first end of the twenty-first capacitor, the first end of the twenty-third resistor, and the twenty-fifth pin of the first control chip, respectively, the second end of the twenty-third resistor is connected to a 1.8V DC power supply, the second end of the twenty-first capacitor is grounded, the first end of the twenty-second capacitor is connected to the seventh pin of the fourth control chip and the 1.8V DC power supply, and the second end is grounded, the first end of the twenty-third capacitor is connected to the third pin of the fourth control chip and the 1.8V DC power supply, and the second end is grounded, the first end of the twenty-fourth resistor is connected to the second pin of the fourth control chip, and the second end is connected to the 1.8V DC power supply, and the first end of the twenty-fifth resistor is connected to the twelfth pin of the fourth control chip, and the second end is connected to the 1.8V DC power supply.

[0015] The electric vehicle positioning circuit provided by this utility model may also include the following features: a factory reset sub-circuit, which is connected to the main control sub-circuit and is used to send a factory reset signal to the main control sub-circuit. The factory reset sub-circuit includes a switch and a 26th resistor. The first ends of the switch and the 26th resistor are both connected to the 76th pin of the first control chip. The second end of the 26th resistor is connected to a 1.8V DC power supply. The second end of the switch is grounded.

[0016] The electric vehicle positioning circuit provided by this utility model may also have the following feature: the SIM card communication sub-circuit includes a fifth control chip, a twenty-fourth capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor, and a twenty-eighth capacitor. The first end of the twenty-fourth capacitor is connected to the third pin of the fifth control chip and the eleventh pin of the first control chip, and the second end is grounded. The first end of the twenty-fifth capacitor is connected to the sixth pin of the fifth control chip and the thirteenth pin of the first control chip, and the second end is grounded. The first end of the twenty-sixth capacitor is connected to the seventh pin of the fifth control chip and the fifteenth pin of the first control chip, and the second end is grounded. The first end of the twenty-seventh capacitor is connected to the eighth pin of the fifth control chip and the fourteenth pin of the first control chip, and the second end is grounded. The first end of the twenty-eighth capacitor is connected to the eighth pin of the fifth control chip and the fourteenth pin of the first control chip, and the second end is grounded. The first pin of the fifth control chip is grounded.

[0017] The electric vehicle positioning circuit provided by this utility model may also include: a status display subcircuit, connected to the main control subcircuit, the Beidou positioning subcircuit, and the power input conversion subcircuit, for displaying network status, positioning status, and power status; and a software burning and debugging interface subcircuit, connected to the main control circuit, for debugging software parameters.

[0018] The status display sub-circuit includes: a 27th resistor, a 28th resistor, a 29th resistor, a 30th resistor, a first LED, a second LED, a third LED, and a second transistor. The first terminal of the 27th resistor is connected to a 4.3V DC power supply, and the second terminal is connected to the anode of the first LED. The first terminal of the 28th resistor is connected to the third pin of the third control chip, and the second terminal is connected to the anode of the second LED. The first terminal of the 29th resistor is connected to a 4.3V DC power supply, and the second terminal is connected to the anode of the third LED. The collector of the second transistor is connected to the cathode of the third LED, the emitter is grounded, and the base is connected to the first terminal of the 30th resistor. The second terminal of the 30th resistor is connected to the 86th pin of the first control chip. The cathodes of both the first and second LEDs are grounded.

[0019] The power input conversion sub-circuit includes resistors 31 and 32, capacitors 29, 30, 31, 32, 33, 34, 35, and 36, a sixth control chip, a sixth inductor, a second Schottky diode, a first diode, and a second diode.

[0020] The cathodes of the first and second diodes, the first terminal of the twenty-ninth capacitor, and the first terminal of the thirtieth capacitor are all connected to the third pin of the sixth control chip. The anode of the first diode is connected to the external power input. The anode of the second diode, the second terminal of the twenty-ninth capacitor, and the second terminal of the thirtieth capacitor are all grounded. The first terminal of the thirty-first capacitor is connected to the fourth pin of the sixth control chip, and the second terminal is connected to the fifth pin of the sixth control chip. The cathode of the second Schottky diode and the first terminal of the sixth inductor are both connected to the second terminal of the thirty-first capacitor, and the anode of the second Schottky diode is grounded. The first terminals of the thirty-second, thirty-third, thirty-fourth, thirty-fifth, and thirty-sixth capacitors are all connected to the second terminal of the sixth inductor, and the second terminals are all grounded. The first terminals of the thirty-first and thirty-second resistors are both connected to the first pin of the sixth control chip, and the second terminal of the thirty-first resistor is grounded. The second terminal of the thirty-second resistor is connected to the second terminal of the sixth inductor. The sixth and seventh pins of the sixth control chip are connected, and the eighth and ninth pins are grounded.

[0021] Functions and effects of utility models

[0022] The electric vehicle positioning circuit according to this utility model includes: a main control sub-circuit for controlling the operation of sub-circuits and data processing; a Beidou positioning sub-circuit connected to the main control sub-circuit for receiving and processing satellite signals and outputting accurate positioning information; a SIM card communication sub-circuit connected to the main control sub-circuit for sending positioning information to a cloud server; an RS485 communication interface sub-circuit connected to the main control sub-circuit for converting cloud data into differential signals for inputting into the main control sub-circuit; and a power acquisition sub-circuit connected to the main control sub-circuit for an adaptation range of 0-10. The circuit features a 0V input voltage; an acceleration sensing sub-circuit connected to the main control sub-circuit, used to detect motion signals and send them to the main control sub-circuit; a power input conversion sub-circuit connected to an external power supply, used to convert the input voltage to 4.2V; and a controller interface sub-circuit connected to the RS485 communication interface sub-circuit, the power acquisition sub-circuit, and the power input conversion sub-circuit, respectively, used to direct external signals, power, and data to their corresponding sub-circuits. Therefore, the electric vehicle positioning circuit of this invention achieves comprehensive monitoring of the data required by the new national standard, and its simple design greatly reduces costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a sub-circuit of the electric vehicle positioning circuit in an embodiment of this utility model.

[0024] Figure 2 This is a circuit diagram of the main control sub-circuit in an embodiment of this utility model.

[0025] Figure 3 This is a circuit diagram of the Beidou positioning sub-circuit in an embodiment of this utility model.

[0026] Figure 4 This is a circuit diagram of the signal adapter sub-circuit in an embodiment of this utility model.

[0027] Figure 5 This is a circuit diagram of the power acquisition sub-circuit in an embodiment of this utility model.

[0028] Figure 6 This is a circuit diagram of the external power supply disconnection detection sub-circuit in an embodiment of this utility model.

[0029] Figure 7 This is a circuit diagram of the ACC signal acquisition sub-circuit in an embodiment of this utility model.

[0030] Figure 8 This is a circuit diagram of the acceleration sensor sub-circuit in an embodiment of this utility model.

[0031] Figure 9 This is a circuit diagram of the SIM card communication sub-circuit in an embodiment of this utility model.

[0032] Figure 10 This is a circuit diagram of the factory reset sub-circuit in an embodiment of this utility model.

[0033] Figure 11 This is a circuit diagram of the status display sub-circuit in an embodiment of this utility model.

[0034] Figure 12 This is a circuit diagram of the power input conversion sub-circuit in an embodiment of this utility model.

[0035] Figure 13 This is a circuit diagram of the controller interface sub-circuit in an embodiment of this utility model.

[0036] Figure 14 This is a circuit diagram of the software burning and debugging interface sub-circuit in an embodiment of this utility model. Detailed Implementation

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the electric vehicle positioning circuit of this utility model.

[0039] Example

[0040] Figure 1 This is a schematic diagram of a sub-circuit of the electric vehicle positioning circuit in an embodiment of this utility model.

[0041] Figure 2 This is a circuit diagram of the main control sub-circuit in an embodiment of this utility model.

[0042] like Figure 1 and Figure 2 As shown, this embodiment provides an electric vehicle positioning circuit 100, including: a main control sub-circuit 1, a Beidou positioning sub-circuit 2, a signal adaptation sub-circuit 3, a power acquisition sub-circuit 4, an external power supply circuit failure detection sub-circuit 5, an ACC signal acquisition sub-circuit 6, an acceleration sensing sub-circuit 7, a SIM card communication sub-circuit 8, a factory reset sub-circuit 9, a status display sub-circuit 10, an RS485 communication interface sub-circuit 11, a power input conversion sub-circuit 12, a controller interface sub-circuit 13, and a software burning and debugging interface sub-circuit 14.

[0043] The main control sub-circuit 1 is used to control the operation of the sub-circuits and process data.

[0044] The main control sub-circuit 1 includes: a first control chip ML307R, a first capacitor C13, a second capacitor C12, a third capacitor C38, a fourth capacitor C11, a fifth capacitor C164, a sixth capacitor C165, a seventh capacitor C14, an eighth capacitor C34, a ninth capacitor C35, a first resistor R34, a second resistor R64, a third resistor R8, a first inductor L2, a second inductor L3, and a second control chip U9.

[0045] The first terminals of the first capacitor C13, the second capacitor C12, the third capacitor C38, the fourth capacitor C11, the fifth capacitor C164, and the sixth capacitor C165 are all connected to the forty-second and forty-third pins of the first control chip ML307R, and the second terminals are grounded.

[0046] The first terminal of the seventh capacitor C14 is connected to the fifteenth pin of the first control chip ML307R, and the second terminal is grounded.

[0047] The first terminal of the eighth capacitor C34 is connected to the thirty-fifth pin of the first control chip ML307R, and the second terminal is grounded.

[0048] The first terminal of the first resistor R34 is connected to the second terminal of the eighth capacitor C34, and the second terminal is grounded.

[0049] The first terminal of the ninth capacitor C35 is connected to the second terminal of the first resistor R34, and the second terminal is grounded.

[0050] The first terminals of the first inductor L2, the second inductor L3, and the second resistor R64 are respectively connected to the second terminal of the first resistor R34, and the second terminals are respectively connected to the second control chip U9.

[0051] The first end of the third resistor R8 is connected to the seventh pin of the first control chip ML307R, and the second end is grounded.

[0052] Figure 3 This is a circuit diagram of the Beidou positioning sub-circuit in an embodiment of this utility model.

[0053] like Figure 3 As shown, the Beidou positioning sub-circuit 2 is connected to the main control sub-circuit 1 and is used to receive and process satellite signals and output accurate positioning information.

[0054] The Beidou positioning sub-circuit 2 includes: a third control chip P2, an eleventh capacitor C27, a twelfth capacitor C28, a thirteenth capacitor C163, a fourteenth capacitor C24, a fourth resistor R27, a fifth resistor R23, a sixth resistor R24, a first MOSFET Q6, a second MOSFET Q7, a third inductor L6, a fourth inductor L4, and a fifth inductor L5.

[0055] The tenth, twelfth, thirteenth, and twenty-fourth pins of the third control chip P2 are grounded.

[0056] The eleventh pin of the third control chip P2 is connected to the first terminal of the eleventh capacitor C27 and the first terminal of the fourth resistor R27. The second terminal of the fourth resistor R27 is connected to the first terminal of the twelfth capacitor C28 and the first terminal of the thirteenth capacitor C163. The second terminals of the eleventh capacitor C27 and the twelfth capacitor C28 are both grounded.

[0057] The first terminals of the third inductor L6, the fourth inductor L4, and the fifth inductor L5 are all connected to the second terminal of the thirteenth capacitor C163. The second terminal of the third inductor L6 is grounded, the second terminal of the fourth inductor L4 is connected to the external interface ANT1, and the second terminal of the fifth inductor L5 is connected to the external interface ANT2.

[0058] The drain of the first MOSFET Q6 is connected to the twentieth pin of the third control chip P2, the source is connected to the twenty-eighth pin of the first control chip ML307R, and the gate is connected to a 1.8V DC power supply.

[0059] The drain of the second MOSFET Q7 is connected to the twenty-first pin of the third control chip P2, the source is connected to the twenty-ninth pin of the first control chip ML307R, and the gate is connected to a 1.8V DC power supply.

[0060] The first end of the fifth resistor R23 is connected to the twenty-eighth pin of the first control chip ML307R, and the second end is connected to a 1.8V DC power supply.

[0061] The first end of the sixth resistor R24 ​​is connected to the twenty-ninth pin of the first control chip ML307R, and the second end is connected to a 3.3V DC power supply.

[0062] The first terminal of the fourteenth capacitor C24 is connected to the 3.3V DC power supply and the twenty-third pin of the third control chip P2, while the second terminal is grounded.

[0063] In this embodiment, the signal flows into the Beidou positioning sub-circuit 2 from the two ports ANT1 and ANT2, and the received signal is processed and sent to the first control chip ML307R.

[0064] Figure 4 This is a circuit diagram of the signal adapter sub-circuit in an embodiment of this utility model.

[0065] like Figure 4 As shown, the signal adapter sub-circuit 3 is connected to the main control sub-circuit 1 and is used to convert external signals into signals that the main control sub-circuit 1 can recognize.

[0066] The signal adapter sub-circuit 3 includes: the fifteenth capacitor C156, the sixteenth capacitor C155, the seventeenth capacitor C161, the seventh resistor R54, the eighth resistor R61, the ninth resistor R45, the tenth resistor R51, the eleventh resistor R58, the twelfth resistor R56, the third MOSFET Q13, the first transistor Q15, and the first Schottky diode D50.

[0067] The cathode of the first Schottky diode D50, the first terminal of the seventh resistor R54, the first terminal of the eighth resistor R61, the first terminal of the ninth resistor R45, and the first terminal of the fifteenth capacitor C156 are all connected to the external signal interface. The anode of the first Schottky diode D50, the second terminal of the seventh resistor R54, and the second terminal of the fifteenth capacitor C156 are all grounded. The second terminal of the eighth resistor R61 is connected to a 4.3V DC power supply.

[0068] The second terminal of the ninth resistor R45 and the first terminal of the sixteenth capacitor C155 are both connected to the gate of the third MOSFET Q13, and the source of the third MOSFET Q13 and the second terminal of the sixteenth capacitor C155 are both grounded.

[0069] The first terminal of the tenth resistor R51 and the first terminal of the eleventh resistor R58 are both connected to the drain of the third MOSFET Q13. The second terminal of the tenth resistor R51 is connected to a 1.8V DC power supply. The base of the first transistor Q15 is connected to the second terminal of the eleventh resistor R58, and its emitter is grounded. The first terminal of the twelfth resistor R56, the first terminal of the seventeenth capacitor C161, and the collector of the first transistor R15 are all connected to the sixteenth pin of the first control chip ML307R. The second terminal of the twelfth resistor R56 is connected to a 1.8V DC power supply.

[0070] Figure 5 This is a circuit diagram of the power acquisition sub-circuit in an embodiment of this utility model.

[0071] like Figure 5 As shown, the power acquisition sub-circuit 4 is connected to the main control sub-circuit 1 and is used to adapt to an input voltage range of 0-100V.

[0072] The power acquisition sub-circuit 4 includes: the thirteenth resistor R10, the fourteenth resistor R11, and the eighteenth capacitor C21.

[0073] The first terminals of the thirteenth resistor R10, the fourteenth resistor R11, and the eighteenth capacitor C21 are all connected to the ninth pin of the first control chip ML307R. The second terminal of the thirteenth resistor R10 is connected to a 48V DC power supply. The second terminals of the fourteenth resistor R11 and the eighteenth capacitor C21 are both grounded.

[0074] Figure 6 This is a circuit diagram of the external power supply disconnection detection sub-circuit in an embodiment of this utility model.

[0075] like Figure 6 As shown, the external power supply disconnection detection sub-circuit 5 is connected to the main control sub-circuit 1 and is used to detect whether the external power supply is in a power supply state.

[0076] The external power supply circuit breaker detection sub-circuit 5 includes: the nineteenth capacitor C42, the fifteenth resistor R39, the sixteenth resistor R42, the seventeenth resistor R40, the eighteenth resistor R41, and the fourth MOSFET Q12.

[0077] The first terminal of the nineteenth capacitor C42, the first terminal of the fifteenth resistor R39, and the drain of the fourth MOSFET Q12 are all connected to the eighty-seventh pin of the first control chip ML307R. The second terminal of the nineteenth capacitor C42 and the source of the fourth MOSFET Q12 are both grounded. The second terminal of the fifteenth resistor R39 is connected to a 1.8V DC power supply. The first terminal of the sixteenth resistor R42 is connected to the gate of the fourth MOSFET Q12, and the second terminal is connected to the first terminals of the seventeenth resistor R40 and the eighteenth resistor R41, respectively. The second terminal of the seventeenth resistor R40 is connected to a 48V DC power supply, and the second terminal of the eighteenth resistor R41 is grounded.

[0078] Figure 7 This is a circuit diagram of the ACC signal acquisition sub-circuit in an embodiment of this utility model.

[0079] like Figure 7 As shown, the ACC signal acquisition sub-circuit 6 is connected to the main control sub-circuit 1 and is used to detect whether there is an ACC signal input.

[0080] The ACC signal acquisition sub-circuit 6 includes: the twentieth capacitor C41, the nineteenth resistor R36, the twentieth resistor R43, the twenty-first resistor R15, the twenty-second resistor R14, and the fifth MOSFET Q11.

[0081] The first terminal of the twentieth capacitor C41, the first terminal of the nineteenth resistor R36, and the drain of the fifth MOSFET Q11 are all connected to the eighty-first pin of the first control chip ML307R. The second terminal of the twentieth capacitor C41 and the source of the fifth MOSFET Q11 are both grounded. The second terminal of the nineteenth resistor R36 is connected to a 1.8V DC power supply. The first terminal of the twentieth resistor R43 is connected to the gate of the fifth MOSFET Q11, and the second terminal is connected to the first terminal of the twenty-first resistor R15 and the twenty-second resistor R14. The second terminal of the twenty-first resistor R15 is connected to the ACC input interface, and the second terminal of the twenty-second resistor R14 is grounded.

[0082] Figure 8 This is a circuit diagram of the acceleration sensor sub-circuit in an embodiment of this utility model.

[0083] As shown in the figure, the acceleration sensing sub-circuit 7 is connected to the main control sub-circuit 1 and is used to detect motion signals and send them to the main control sub-circuit 1.

[0084] The acceleration sensing sub-circuit 7 includes: the fourth control chip U7, the twenty-first capacitor C159, the twenty-second capacitor C33, the twenty-third capacitor C32, the twenty-third resistor R30, the twenty-fourth resistor, and the twenty-fifth resistor.

[0085] The eighth and ninth pins of the fourth control chip U7 are grounded. The fifth pin is connected to the first terminal of the twenty-first capacitor C159, the first terminal of the twenty-third resistor R30, and the twenty-fifth pin of the first control chip ML307R. The second terminal of the twenty-third resistor R30 is connected to a 1.8V DC power supply, and the second terminal of the twenty-first capacitor C159 is grounded.

[0086] The first terminal of the twenty-second capacitor C33 is connected to the seventh pin of the fourth control chip U9 and the 1.8V DC power supply, and the second terminal is grounded. The first terminal of the twenty-third capacitor C32 is connected to the third pin of the fourth control chip U9 and the 1.8V DC power supply, and the second terminal is grounded.

[0087] The first end of the twenty-fourth resistor R32 is connected to the second pin of the fourth control chip U9 and the sixty-sixth pin of the first control chip ML307R. The second end is connected to a 1.8V DC power supply. The first end of the twenty-fifth resistor R33 is connected to the twelfth pin of the fourth control chip U9 and the sixty-seventh pin of the first control chip ML307R. The second end is connected to a 1.8V DC power supply.

[0088] Figure 9 This is a circuit diagram of the SIM card communication sub-circuit in an embodiment of this utility model.

[0089] like Figure 9 As shown, the SIM card communication sub-circuit 8 is connected to the main control sub-circuit 1 and is used to send the location information to the cloud server.

[0090] The SIM card communication sub-circuit includes: the fifth control chip U8, the twenty-fourth capacitor C48, the twenty-fifth capacitor C52, the twenty-sixth capacitor C49, the twenty-seventh capacitor C50, and the twenty-eighth capacitor C51.

[0091] The first terminal of the twenty-fourth capacitor C48 is connected to the third pin of the fifth control chip U8 and the eleventh pin of the first control chip ML307R, respectively, and the second terminal is grounded.

[0092] The first terminal of the 25th capacitor C52 is connected to the sixth pin of the fifth control chip U8 and the thirteenth pin of the first control chip ML307R, respectively, and the second terminal is grounded.

[0093] The first terminal of the twenty-sixth capacitor C49 is connected to the seventh pin of the fifth control chip U8 and the fifteenth pin of the first control chip ML307R, respectively, and the second terminal is grounded.

[0094] The first terminal of the twenty-seventh capacitor C50 is connected to the eighth pin of the fifth control chip U8 and the fourteenth pin of the first control chip ML307R, respectively, and the second terminal is grounded.

[0095] The first terminal of the twenty-eighth capacitor C51 is connected to the eighth pin of the fifth control chip U8 and the fourteenth pin of the first control chip ML307R, respectively, and the second terminal is grounded.

[0096] The first pin of the fifth control chip U8 is grounded.

[0097] Figure 10 This is a circuit diagram of the factory reset sub-circuit in an embodiment of this utility model.

[0098] like Figure 10 As shown, the factory reset sub-circuit 9 is connected to the main control sub-circuit 1 and is used to send a factory reset signal to the main control sub-circuit 1.

[0099] The factory reset sub-circuit 9 includes: switch SW1 and the twenty-sixth resistor R31.

[0100] The first terminals of switch SW1 and the twenty-sixth resistor R31 are both connected to the seventy-sixth pin of the first control chip ML307R. The second terminal of the twenty-sixth resistor R31 is connected to a 1.8V DC power supply, and the second terminal of switch SW1 is grounded.

[0101] Figure 11 This is a circuit diagram of the status display sub-circuit in an embodiment of this utility model.

[0102] like Figure 11 As shown, the status display sub-circuit 10 is connected to the main control sub-circuit 1, the Beidou positioning sub-circuit 2, and the power input conversion sub-circuit 12, respectively, and is used to display the network status, positioning status, and power status.

[0103] The status display sub-circuit 10 includes: a 27th resistor R20, a 28th resistor R21, a 29th resistor, a 30th resistor, a first light-emitting diode LED1, a second light-emitting diode LED2, a third light-emitting diode LED3, and a second transistor Q1.

[0104] The first terminal of the twenty-seventh resistor R20 is connected to a 4.3V DC power supply, and the second terminal is connected to the positive terminal of the first light-emitting diode LED1.

[0105] The first end of the twenty-eighth resistor R21 is connected to the third pin of the third control chip P2, and the second end is connected to the positive terminal of the second light-emitting diode LED2.

[0106] The first terminal of the twenty-ninth resistor R37 is connected to a 4.3V DC power supply, the second terminal is connected to the positive terminal of the third LED3, the collector of the second transistor Q1 is connected to the negative terminal of the third LED3, the emitter is grounded, the base is connected to the first terminal of the thirtieth resistor R38, and the second terminal of the thirtieth resistor R38 is connected to the eighty-sixth pin of the first control chip ML307R.

[0107] The negative terminals of both the first LED1 and the second LED2 are grounded.

[0108] RS485 communication interface sub-circuit 11 is connected to main control sub-circuit 1 and is used to convert cloud data into differential signals and input them into main control sub-circuit 1.

[0109] In this embodiment, the first light-emitting diode LED1 emits red light, the second light-emitting diode LED2 emits green light, and the third light-emitting diode LED3 emits yellow light.

[0110] Figure 12 This is a circuit diagram of the power input conversion sub-circuit in an embodiment of this utility model.

[0111] like Figure 12 As shown, the power input conversion sub-circuit 12 is connected to an external power supply and is used to convert the input voltage to 4.2V.

[0112] The power input conversion sub-circuit 12 includes a 31st resistor R3, a 32nd resistor R4, a 29th capacitor C1, a 30th capacitor C3, a 31st capacitor C2, a 32nd capacitor C4, a 33rd capacitor C5, a 34th capacitor C6, a 35th capacitor C39, a 36th capacitor C162, a 6th control chip U10, a 6th inductor L1, a 2nd Schottky diode D3, a 1st diode D1, and a 2nd diode D19.

[0113] The cathodes of the first diode D1, the cathode of the second diode D19, the first terminal of the twenty-ninth capacitor C1, and the first terminal of the thirtieth capacitor C3 are all connected to the third pin of the sixth control chip U10. The anode of the first diode D1 is connected to the external power input terminal. The anodes of the second diode D19, the second terminal of the twenty-ninth capacitor C1, and the second terminal of the thirtieth capacitor C3 are all grounded.

[0114] The first terminal of the thirty-first capacitor C2 is connected to the fourth pin of the sixth control chip U10, and the second terminal is connected to the fifth pin of the sixth control chip U10.

[0115] The negative terminal of the second Schottky diode D3 and the first terminal of the sixth inductor L1 are both connected to the second terminal of the thirty-first capacitor C2. The positive terminal of the second Schottky diode D3 is grounded. The first terminals of the thirty-second capacitor C4, thirty-third capacitor C5, thirty-fourth capacitor C6, thirty-fifth capacitor C39, and thirty-sixth capacitor C162 are all connected to the second terminal of the sixth inductor L1, and the second terminals of all capacitors are grounded.

[0116] The first terminals of the thirty-first resistor R3 and the thirty-second resistor R4 are both connected to the first pin of the sixth control chip U10. The second terminal of the thirty-first resistor R3 is grounded, and the second terminal of the thirty-second resistor R4 is connected to the second terminal of the sixth inductor L1.

[0117] The sixth pin of the sixth control chip U10 is connected to the seventh pin, and the eighth and ninth pins are grounded. In this embodiment, the second diode D19 is a transient voltage suppression diode, and the thirty-sixth capacitor C162 is a farad capacitor.

[0118] Figure 13 This is a circuit diagram of the controller interface sub-circuit in an embodiment of this utility model.

[0119] like Figure 13 As shown, the controller interface sub-circuit 13 is connected to the RS485 communication interface sub-circuit 11, the power acquisition sub-circuit 4, and the power input conversion sub-circuit 12, respectively, and is used to direct external signals, power and data to the corresponding sub-circuits.

[0120] Among them, the first pin of the H1 busbar is used for power input, the second pin is grounded, the film section is used for ACC input, the fourth pin is used for signal input, and the fifth pin is also used for signal input.

[0121] Figure 14 This is a circuit diagram of the software burning and debugging interface sub-circuit in an embodiment of this utility model.

[0122] like Figure 14 As shown, the software burning debugging interface sub-circuit 14 is connected to the main control sub-circuit 1 and is used to debug software parameters. The first pin of the 10-pin interface is connected to the fifteenth pin of the first control chip ML307R, the second pin is connected to the thirty-ninth pin of the first control chip ML307R, the third pin is connected to the twenty-ninth pin of the first control chip ML307R, the fourth, ninth and tenth pins are grounded, the fifth pin is connected to the eighty-second pin of the first control chip ML307R, the sixth pin is connected to the sixty-first pin of the first control chip ML307R, the seventh pin is connected to the fifty-ninth pin of the first control chip ML307R, and the eighth pin is connected to the sixtieth pin of the first control chip ML307R.

[0123] The role and effect of the embodiments

[0124] The electric vehicle positioning circuit of this embodiment includes: a main control sub-circuit for controlling the operation of sub-circuits and data processing; a Beidou positioning sub-circuit connected to the main control sub-circuit for receiving and processing satellite signals and outputting accurate positioning information; a SIM card communication sub-circuit connected to the main control sub-circuit for sending positioning information to a cloud server; an RS485 communication interface sub-circuit connected to the main control sub-circuit for converting cloud data into differential signals for input to the main control sub-circuit; a power acquisition sub-circuit connected to the main control sub-circuit for adapting to input voltages ranging from 0-100V; an acceleration sensing sub-circuit connected to the main control sub-circuit for detecting motion signals and sending them to the main control sub-circuit; a power input conversion sub-circuit connected to an external power supply for converting the input voltage to 4.2V; and a controller interface sub-circuit connected to the RS485 communication interface sub-circuit, the power acquisition sub-circuit, and the power input conversion sub-circuit respectively, for directing external signals, power, and data to their respective sub-circuits. Therefore, the electric vehicle positioning circuit of this utility model achieves comprehensive monitoring of the data required by the new national standard, and its design is simple, greatly reducing costs.

[0125] This embodiment also includes a signal adapter sub-circuit to convert external signals into signals that can be recognized by the main control sub-circuit.

[0126] This embodiment also includes an external power supply interruption detection sub-circuit to detect whether the external power supply is in a power supply state.

[0127] This embodiment also includes an ACC signal acquisition sub-circuit to detect whether there is an ACC signal input.

[0128] This embodiment also includes a factory reset sub-circuit, which sends a factory reset signal to the main control sub-circuit.

[0129] This embodiment also includes a status display sub-circuit to display network status, location status, and power status.

[0130] This embodiment also includes a power input conversion sub-circuit. Compared with the prior art which uses a lithium battery as a backup power source to power the cloud platform for reporting battery removal events when the battery is removed, this application uses a supercapacitor as a backup power source to power the cloud platform for reporting battery removal events. This eliminates the need for a lithium battery as a backup power source, greatly reducing costs. Furthermore, the use of a supercapacitor expands the operating temperature range of the circuit and enhances the environmental adaptability of the circuit and the overall device.

[0131] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A positioning circuit for an electric vehicle, characterized in that, include: The main control sub-circuit is used to control the operation of the sub-circuits and process data. The Beidou positioning sub-circuit, connected to the main control sub-circuit, is used to receive and process satellite signals and output accurate positioning information. The SIM card communication sub-circuit, connected to the main control sub-circuit, is used to send the positioning information to the cloud server; The RS485 communication interface sub-circuit is connected to the main control sub-circuit and is used to convert cloud data into differential signals and input them into the main control sub-circuit. The power acquisition sub-circuit is connected to the main control sub-circuit and is used to adapt to an input voltage range of 0-100V. An acceleration sensing sub-circuit, connected to the main control sub-circuit, is used to detect motion signals and send them to the main control sub-circuit; The power input conversion sub-circuit is connected to an external power supply and is used to convert the input voltage to 4.2V; The controller interface sub-circuit is connected to the RS485 communication interface sub-circuit, the power acquisition sub-circuit, and the power input conversion sub-circuit, respectively, and is used to direct external signals, power and data to the corresponding sub-circuits.

2. The electric vehicle positioning circuit according to claim 1, characterized in that, in, The main control sub-circuit includes a first control chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first resistor, a second resistor, a third resistor, a first inductor, a second inductor, and a second control chip. The first terminals of the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, and the sixth capacitor are all connected to pins 42 and 43 of the first control chip, and their second terminals are grounded. The first terminal of the seventh capacitor is connected to the fifteenth pin of the first control chip, and the second terminal is grounded. The first terminal of the eighth capacitor is connected to the thirty-fifth pin of the first control chip, and the second terminal is grounded. The first terminal of the first resistor is connected to the second terminal of the eighth capacitor, and the second terminal is grounded. The first terminal of the ninth capacitor is connected to the second terminal of the first resistor, and the second terminal is grounded. The first terminals of the first inductor, the second inductor, and the second resistor are respectively connected to the second terminal of the first resistor, and their second terminals are respectively connected to the second control chip. The first end of the third resistor is connected to the seventh pin of the first control chip, and the second end is grounded.

3. The electric vehicle positioning circuit according to claim 2, characterized in that, in, The Beidou positioning sub-circuit includes a third control chip, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a first MOSFET, a second MOSFET, a third inductor, a fourth inductor, and a fifth inductor. The tenth, twelfth, thirteenth, and twenty-fourth pins of the third control chip are grounded. The eleventh pin of the third control chip is connected to the first terminal of the eleventh capacitor and the first terminal of the fourth resistor, respectively. The second terminal of the fourth resistor is connected to the first terminal of the twelfth capacitor and the first terminal of the thirteenth capacitor, respectively. The second terminals of the eleventh capacitor and the twelfth capacitor are both grounded. The first terminals of the third inductor, the fourth inductor, and the fifth inductor are all connected to the second terminal of the thirteenth capacitor. The second terminal of the third inductor is grounded, the second terminal of the fourth inductor is connected to the external interface ANT1, and the second terminal of the fifth inductor is connected to the external interface ANT2. The drain of the first MOSFET is connected to the twentieth pin of the third control chip, the source is connected to the twenty-eighth pin of the first control chip, and the gate is connected to a 1.8V DC power supply. The drain of the second MOSFET is connected to the twenty-first pin of the third control chip, the source is connected to the twenty-ninth pin of the first control chip, and the gate is connected to a 1.8V DC power supply. The first terminal of the fifth resistor is connected to the twenty-eighth pin of the first control chip, and the second terminal is connected to a 1.8V DC power supply. The first terminal of the sixth resistor is connected to the twenty-ninth pin of the first control chip, and the second terminal is connected to a 3.3V DC power supply. The first terminal of the fourteenth capacitor is connected to a 3.3V DC power supply and the twenty-third pin of the third control chip, while the second terminal is grounded.

4. The electric vehicle positioning circuit according to claim 2, characterized in that, It also includes a signal adapter sub-circuit, connected to the main control sub-circuit, used to convert external signals into signals that the main control sub-circuit can recognize. The signal adapter sub-circuit includes: a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a third MOSFET, a first transistor, and a first Schottky diode. The cathode of the first Schottky diode, the first terminal of the seventh resistor, the first terminal of the eighth resistor, the first terminal of the ninth resistor, and the first terminal of the fifteenth capacitor are all connected to an external signal interface; the anode of the first Schottky diode, the second terminal of the seventh resistor, and the second terminal of the fifteenth capacitor are all grounded, and the second terminal of the eighth resistor is connected to a 4.3V DC power supply. The second terminal of the ninth resistor and the first terminal of the sixteenth capacitor are both connected to the gate of the third MOSFET, and the source of the third MOSFET and the second terminal of the sixteenth capacitor are both grounded. The first terminal of the tenth resistor and the first terminal of the eleventh resistor are both connected to the drain of the third MOSFET. The second terminal of the tenth resistor is connected to a 1.8V DC power supply. The base of the first transistor is connected to the second terminal of the eleventh resistor, and the emitter is grounded. The first terminal of the twelfth resistor, the first terminal of the seventeenth capacitor, and the collector of the first transistor are all connected to the sixteenth pin of the first control chip. The second terminal of the twelfth resistor is connected to a 1.8V DC power supply.

5. The electric vehicle positioning circuit according to claim 2, characterized in that, in, The power acquisition sub-circuit includes a thirteenth resistor, a fourteenth resistor, and an eighteenth capacitor. The first terminals of the thirteenth resistor, the fourteenth resistor, and the eighteenth capacitor are all connected to the ninth pin of the first control chip. The second terminal of the thirteenth resistor is connected to a 48V DC power supply, and the second terminals of the fourteenth resistor and the eighteenth capacitor are both grounded.

6. The electric vehicle positioning circuit according to claim 2, characterized in that, It also includes an external power supply interruption detection sub-circuit, connected to the main control sub-circuit, used to detect whether the external power supply is in a power supply state. The external power supply circuit breaker detection sub-circuit includes a nineteenth capacitor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, and a fourth MOSFET. The first terminal of the nineteenth capacitor, the first terminal of the fifteenth resistor, and the drain of the fourth MOSFET are all connected to the eighty-seventh pin of the first control chip. The second terminal of the nineteenth capacitor and the source of the fourth MOSFET are both grounded. The second terminal of the fifteenth resistor is connected to a 1.8V DC power supply. The first terminal of the sixteenth resistor is connected to the gate of the fourth MOSFET, and the second terminal is connected to the first terminals of the seventeenth and eighteenth resistors respectively. The second terminal of the seventeenth resistor is connected to a 48V DC power supply, and the second terminal of the eighteenth resistor is grounded. The ACC signal acquisition sub-circuit, connected to the main control sub-circuit, is used to detect whether there is an ACC signal input. The ACC signal acquisition sub-circuit includes a twentieth capacitor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, and a fifth MOSFET. The first terminal of the twentieth capacitor, the first terminal of the nineteenth resistor, and the drain of the fifth MOSFET are all connected to the eighty-first pin of the first control chip. The second terminal of the twentieth capacitor and the source of the fifth MOSFET are both grounded. The second terminal of the nineteenth resistor is connected to a 1.8V DC power supply. The first terminal of the twentieth resistor is connected to the gate of the fifth MOSFET, and the second terminal is connected to the first terminals of the twentieth and twentieth-second resistors, respectively. The second terminal of the twentieth resistor is connected to the ACC input interface, and the second terminal of the twentieth-second resistor is grounded.

7. The electric vehicle positioning circuit according to claim 2, characterized in that, in, The acceleration sensing sub-circuit includes a fourth control chip, a twenty-first capacitor, a twenty-second capacitor, a twenty-third capacitor, a twenty-third resistor, a twenty-fourth resistor, and a twenty-fifth resistor. The eighth and ninth pins of the fourth control chip are grounded, the fifth pin is connected to the first terminal of the twenty-first capacitor, the first terminal of the twenty-third resistor, and the twenty-fifth pin of the first control chip, respectively. The second terminal of the twenty-third resistor is connected to a 1.8V DC power supply, and the second terminal of the twenty-first capacitor is grounded. The first terminal of the 22nd capacitor is connected to the seventh pin of the fourth control chip and a 1.8V DC power supply, respectively, and the second terminal of the 22nd capacitor is grounded. The first terminal of the 23rd capacitor is connected to the third pin of the fourth control chip and a 1.8V DC power supply, respectively, and the second terminal of the 23rd capacitor is grounded. The first end of the 24th resistor is connected to the second pin of the fourth control chip, and the second end of the 24th resistor is connected to a 1.8V DC power supply. The first end of the 25th resistor is connected to the 12th pin of the fourth control chip, and the second end of the 25th resistor is connected to a 1.8V DC power supply.

8. The electric vehicle positioning circuit according to claim 2, characterized in that, It also includes a factory reset sub-circuit, connected to the main control sub-circuit, used to send a factory reset signal to the main control sub-circuit. The factory reset sub-circuit includes a switch and a 26th resistor. The first terminal of both the switch and the second sixteenth resistor is connected to the seventy-sixth pin of the first control chip, the second terminal of the second sixteenth resistor is connected to a 1.8V DC power supply, and the second terminal of the switch is grounded.

9. The electric vehicle positioning circuit according to claim 2, characterized in that, in, The SIM card communication sub-circuit includes a fifth control chip, a twenty-fourth capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor, and a twenty-eighth capacitor. The first terminal of the 24th capacitor is connected to the third pin of the fifth control chip and the eleventh pin of the first control chip, respectively, and the second terminal is grounded. The first terminal of the 25th capacitor is connected to the sixth pin of the fifth control chip and the thirteenth pin of the first control chip, respectively, and the second terminal is grounded. The first terminal of the 26th capacitor is connected to the seventh pin of the fifth control chip and the fifteenth pin of the first control chip, respectively, and the second terminal is grounded. The first terminal of the 27th capacitor is connected to the eighth pin of the fifth control chip and the fourteenth pin of the first control chip, respectively, and the second terminal is grounded. The first terminal of the 28th capacitor is connected to the eighth pin of the fifth control chip and the fourteenth pin of the first control chip, respectively, and the second terminal is grounded. The first pin of the fifth control chip is grounded.

10. The electric vehicle positioning circuit according to claim 3, characterized in that, It also includes a status display subcircuit, which is connected to the main control subcircuit, the Beidou positioning subcircuit, and the power input conversion subcircuit, respectively, and is used to display the network status, positioning status, and power status. The software is burned into the debugging interface sub-circuit, which is connected to the main control sub-circuit, and is used to debug software parameters. The status display sub-circuit includes a 27th resistor, a 28th resistor, a 29th resistor, a 30th resistor, a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, and a second transistor. The first terminal of the twenty-seventh resistor is connected to a 4.3V DC power supply, and the second terminal is connected to the positive terminal of the first LED. The first end of the 28th resistor is connected to the third pin of the third control chip, and the second end is connected to the positive terminal of the second light-emitting diode. The first terminal of the 29th resistor is connected to a 4.3V DC power supply, and the second terminal is connected to the positive terminal of the third LED. The collector of the second transistor is connected to the negative terminal of the third LED, the emitter is grounded, and the base is connected to the first terminal of the 30th resistor. The second terminal of the 30th resistor is connected to the 86th pin of the first control chip. The negative terminals of both the first and second LEDs are grounded. The power input conversion sub-circuit includes a 31st resistor, a 32nd resistor, a 29th capacitor, a 30th capacitor, a 31st capacitor, a 32nd capacitor, a 33rd capacitor, a 34th capacitor, a 35th capacitor, a 36th capacitor, a 6th control chip, a 6th inductor, a 2nd Schottky diode, a 1st diode, and a 2nd diode. The cathodes of the first diode, the second diode, the first terminal of the twenty-ninth capacitor, and the first terminal of the thirtieth capacitor are all connected to the third pin of the sixth control chip. The anode of the first diode is connected to the external power input terminal, and the anodes of the second diode, the second terminal of the twenty-ninth capacitor, and the second terminal of the thirtieth capacitor are all grounded. The first terminal of the thirty-first capacitor is connected to the fourth pin of the sixth control chip, and the second terminal is connected to the fifth pin of the sixth control chip. The negative terminal of the second Schottky diode and the first terminal of the sixth inductor are both connected to the second terminal of the thirty-first capacitor. The positive terminal of the second Schottky diode is grounded. The first terminals of the thirty-second, thirty-third, thirty-fourth, thirty-fifth, and thirty-sixth capacitors are all connected to the second terminal of the sixth inductor, and the second terminals are all grounded. The first terminals of the thirty-first resistor and the thirty-second resistor are both connected to the first pin of the sixth control chip. The second terminal of the thirty-first resistor is grounded, and the second terminal of the thirty-second resistor is connected to the second terminal of the sixth inductor. The sixth pin of the sixth control chip is connected to the seventh pin, and the eighth and ninth pins are grounded.

Images