A multifunctional integrated circuit and electric vehicle

Abstract

This utility model discloses a multifunctional integrated circuit and an electric vehicle, comprising: a microcontroller's charging detection serial port connected to the charging detection terminal of a detection sub-circuit; a microcontroller's mutual recognition input serial port connected to the mutual recognition output terminal of a mutual recognition sub-circuit; and the mutual recognition input terminal of the mutual recognition sub-circuit connected to the microcontroller's mutual recognition output serial port; a microcontroller's information transmission serial port connected to the information receiving terminal of a communication circuit; and a microcontroller's information receiving serial port connected to the information transmission terminal of a communication circuit; a microcontroller's heating control serial port connected to the heating control terminal of a heating control circuit; and a microcontroller's sampling input serial port connected to the sampling output terminal of a sampling circuit; and a microcontroller's sampling output serial port connected to the sampling input terminal of a sampling circuit. This multifunctional integrated circuit integrates mutual recognition, heating control, and communication functions, significantly reducing design costs and improving circuit reliability.

Description

Technical Field

[0001] This utility model relates to the field of circuit control technology, and in particular to a multifunctional integrated circuit and an electric vehicle. Background Technology

[0002] Currently, the battery level display for lead-acid battery electric two-wheelers on the market is based on the battery voltage. When displaying the battery level, the battery level fluctuates with the voltage, making it very inaccurate and causing inconvenience to customers. Utility Model Content

[0003] This utility model provides a multifunctional integrated circuit and electric vehicle. By connecting the charging trigger mutual recognition circuit, communication circuit, charging control circuit, temperature detection circuit, heating control circuit, and sampling circuit to the various functional serial ports of the microcontroller, it realizes the charging trigger and charging mutual recognition between the charger and the electric vehicle. The temperature detection circuit can detect the battery temperature in real time and heat it when the temperature is too low. Communication is achieved through the communication circuit, thus realizing the technical effect of integrating mutual recognition, heating control, and communication functions into one.

[0004] According to a first aspect of this utility model, a multifunctional integrated circuit is provided, comprising: a microcontroller, a charging trigger mutual recognition circuit, a communication circuit, a charging control circuit, a temperature detection circuit, a heating control circuit, and a sampling circuit; the charging trigger mutual recognition circuit comprises: a detection sub-circuit and a mutual recognition sub-circuit;

[0005] The microcontroller's charging detection serial port is connected to the charging detection terminal of the detection sub-circuit; the microcontroller's mutual recognition input serial port is connected to the mutual recognition output terminal of the mutual recognition sub-circuit; and the mutual recognition input terminal of the mutual recognition sub-circuit is connected to the microcontroller's mutual recognition output serial port.

[0006] The microcontroller's information transmission serial port is connected to the information receiving end of the communication circuit, and the microcontroller's information receiving serial port is connected to the information transmission end of the communication circuit.

[0007] The microcontroller's switch-driven serial port is connected to the switch-driven terminal of the charging control circuit.

[0008] The temperature detection serial port of the microcontroller is connected to the temperature detection terminal of the temperature detection circuit.

[0009] The heating control serial port of the microcontroller is connected to the heating control terminal of the heating control circuit;

[0010] The sampling input serial port of the microcontroller is connected to the sampling output terminal of the sampling circuit, and the sampling output serial port of the microcontroller is connected to the sampling input terminal of the sampling circuit.

[0011] Optionally, the heating control circuit includes: a first MOSFET, a first resistor, and a three-terminal fuse;

[0012] The first terminal of the first MOSFET is connected to the heating control negative serial port of the microcontroller, the second terminal of the first MOSFET is connected to the first terminal of the first resistor, and the third terminal of the first MOSFET is connected to the heating control serial port.

[0013] The second end of the first resistor is connected to the differential signal terminal of the microcontroller;

[0014] The first terminal of the three-terminal fuse is connected to the power supply terminal, the second terminal of the three-terminal fuse is connected to the heating control positive serial port of the microcontroller, and the third terminal of the three-terminal fuse is grounded.

[0015] Optionally, the detection sub-circuit includes: a first diode and a second resistor; the mutual recognition sub-circuit includes: a first transistor and a third MOSFET;

[0016] The anode of the first diode is connected to the first end of the second resistor, and the cathode of the first diode is connected to the charging detection serial port; the second end of the second resistor is connected to the power supply terminal.

[0017] The first end of the first transistor is connected to the power supply terminal, the second end of the first transistor is connected to the mutual recognition output serial port, and the third end of the first transistor is connected to the mutual recognition communication terminal.

[0018] The first end of the second transistor is connected to the power supply terminal, the second end of the second transistor is connected to the mutual recognition input serial port, and the third end of the second transistor is connected to the mutual recognition communication terminal.

[0019] Optionally, the communication circuit includes: a third transistor and a fourth transistor;

[0020] The first end of the third transistor is connected to the power supply terminal, the second end of the third transistor is connected to the information receiving serial port, and the third end of the third transistor is connected to the 4G signal terminal of the microcontroller.

[0021] The first end of the fourth transistor is connected to the power supply terminal, the second end of the fourth transistor is connected to the 4G signal terminal, and the third end of the fourth transistor is connected to the information transmission serial port.

[0022] Optionally, the charging control circuit includes: a second MOSFET and a fifth transistor;

[0023] The first terminal of the second MOS transistor is connected to the differential negative signal terminal of the microcontroller, the second terminal of the second MOS transistor is connected to the differential positive signal terminal of the microcontroller, and the third terminal of the second MOS transistor is connected to the third terminal of the fifth transistor.

[0024] The first terminal of the fifth transistor is connected to the power supply terminal, the second terminal of the fifth transistor is connected to the serial port of the switch driver, and the third terminal of the fifth transistor is grounded.

[0025] Optionally, the temperature detection circuit includes: a third resistor and a first capacitor;

[0026] The first end of the third resistor is connected to the temperature detection serial port, and the second end of the third resistor is grounded.

[0027] The first terminal of the first capacitor is connected to the first terminal of the third resistor, and the second terminal of the first capacitor is grounded.

[0028] Optionally, the sampling circuit includes: a fourth resistor, a fifth resistor, and a sixth resistor;

[0029] The fourth resistor, the fifth resistor, and the sixth resistor are connected in parallel. The first ends of the fourth resistor, the fifth resistor, and the sixth resistor are all connected to the sampling input serial port, and the second ends of the fourth resistor, the fifth resistor, and the sixth resistor are all connected to the sampling output serial port.

[0030] Optionally, it may also include: a power supply circuit;

[0031] The power supply circuit is connected to the power serial port of the microcontroller; the power supply circuit is used to provide the microcontroller with a 5V operating voltage.

[0032] Optionally, it may also include: a power supply voltage sampling circuit; the power supply voltage sampling circuit includes a seventh resistor and a second capacitor;

[0033] The first end of the seventh resistor is connected to the power supply voltage sampling serial port of the microcontroller, and the second end of the seventh resistor is grounded.

[0034] The first terminal of the second capacitor is connected to the power supply terminal, and the second terminal of the second capacitor is grounded.

[0035] According to a second aspect of the present invention, an electric vehicle is provided, comprising an electric vehicle body and a multifunctional integrated circuit as described in any of the first aspects of the present invention.

[0036] This utility model discloses a multifunctional integrated circuit, including: a microcontroller, a charging trigger mutual recognition circuit, a communication circuit, a charging control circuit, a temperature detection circuit, a heating control circuit, and a sampling circuit; the charging trigger mutual recognition circuit includes: a detection sub-circuit and a mutual recognition sub-circuit; the microcontroller's charging detection serial port is connected to the charging detection terminal of the detection sub-circuit, the microcontroller's mutual recognition input serial port is connected to the mutual recognition output terminal of the mutual recognition sub-circuit, and the mutual recognition input terminal of the mutual recognition sub-circuit is connected to the microcontroller's mutual recognition output serial port; the microcontroller's information sending serial port is connected to the information receiving terminal of the communication circuit, and the microcontroller's information receiving serial port is connected to the information sending terminal of the communication circuit; the microcontroller's switching transistor driving serial port is connected to the switching transistor driving terminal of the charging control circuit; the microcontroller's temperature detection serial port is connected to the temperature detection terminal of the temperature detection circuit; the microcontroller's heating control serial port is connected to the heating control terminal of the heating control circuit; the microcontroller's sampling input serial port is connected to the sampling output terminal of the sampling circuit, and the microcontroller's sampling output serial port is connected to the sampling input terminal of the sampling circuit. The multifunctional integrated circuit and electric vehicle provided by this utility model are connected to the various functional serial ports of the microcontroller through a charging trigger mutual recognition circuit, a communication circuit, a charging control circuit, a temperature detection circuit, a heating control circuit, and a sampling circuit. This enables charging triggering and mutual recognition between the charger and the electric vehicle. The temperature detection circuit can detect the battery temperature in real time and heat it when the temperature is too low. The communication circuit enables communication, thus achieving the technical effect of integrating mutual recognition, heating control, and communication functions into one.

[0037] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a block diagram of a multifunctional integrated circuit structure provided in an embodiment of the present invention;

[0040] Figure 2 This is a diagram of a multifunctional integrated circuit for heating control provided in this embodiment of the utility model.

[0041] Figure 3 This is a detection sub-circuit diagram in a multifunctional integrated circuit provided in this embodiment of the utility model;

[0042] Figure 4 This is a diagram of a mutual recognition sub-circuit in a multifunctional integrated circuit provided in this embodiment of the utility model;

[0043] Figure 5 This is a communication circuit diagram in a multifunctional integrated circuit provided in this embodiment of the utility model;

[0044] Figure 6 This is a circuit diagram of a multifunctional integrated circuit for charging control provided in this embodiment of the utility model;

[0045] Figure 7 This is a circuit diagram of a multifunctional integrated circuit for temperature detection provided in this embodiment of the utility model;

[0046] Figure 8 This is a sampling circuit diagram in a multifunctional integrated circuit provided in this embodiment of the utility model;

[0047] Figure 9 This is a power supply circuit diagram in a multifunctional integrated circuit provided in this embodiment of the utility model;

[0048] Figure 10 This is a power supply voltage sampling circuit diagram in a multifunctional integrated circuit provided by an embodiment of the present invention. Detailed Implementation

[0049] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0050] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0051] Figure 1This is a block diagram of a multifunctional integrated circuit structure provided in an embodiment of this utility model, with reference to... Figure 1 The multifunctional integrated circuit provided in this embodiment includes: a microcontroller 1, a charging trigger mutual recognition circuit 2, a communication circuit 3, a charging control circuit 4, a temperature detection circuit 5, a heating control circuit 6, and a sampling circuit 7; the charging trigger mutual recognition circuit 2 includes: a detection sub-circuit 21 and a mutual recognition sub-circuit 22; the charging detection serial port of the microcontroller 1 is connected to the charging detection terminal of the detection sub-circuit 21, the mutual recognition input serial port of the microcontroller 1 is connected to the mutual recognition output terminal of the mutual recognition sub-circuit 22, and the mutual recognition input terminal of the mutual recognition sub-circuit 22 is connected to the mutual recognition output serial port of the microcontroller 1; the microcontroller... The serial port for transmitting information of microcontroller 1 is connected to the information receiving end of communication circuit 3, and the serial port for receiving information of microcontroller 1 is connected to the information transmitting end of communication circuit 3; the serial port for driving the switching transistor of microcontroller 1 is connected to the switching transistor driving end of charging control circuit 4; the serial port for temperature detection of microcontroller 1 is connected to the temperature detection end of temperature detection circuit 5; the serial port for heating control of microcontroller 1 is connected to the heating control end of heating control circuit 6; the serial port for sampling input of microcontroller 1 is connected to the sampling output end of sampling circuit 7, and the serial port for sampling output of microcontroller 1 is connected to the sampling input end of sampling circuit 7.

[0052] Specifically, the multifunctional integrated circuit provided in this embodiment includes a detection sub-circuit 21, which is specifically used to detect the charging current; a mutual recognition sub-circuit 22, which is specifically used to confirm the charging protocol to ensure the safety and legality of charging; a communication circuit 3, which is specifically used for information interaction and transmission with the microcontroller 1; a charging control circuit 4, which is specifically used to charge and stop charging the battery; a temperature detection circuit 5, which is specifically used to detect the electrode temperature of the battery in real time to ensure the safety of the charging process; a heating control circuit 6, which is specifically used to heat the battery to achieve the optimal charging temperature when the temperature detection circuit 5 detects that the electrode temperature of the battery is too low, in order to ensure charging efficiency; and a sampling circuit 7, which is specifically used to sample the charging current and then transmit it to the microcontroller 1. The microcontroller 1 integrates the charging current to estimate the remaining percentage of battery capacity.

[0053] This utility model integrates the battery's temperature measurement, mutual recognition, charging detection, heating, charging, and communication functions into one unit, thereby enabling comprehensive monitoring of the battery through a single integrated circuit. This significantly reduces design costs while improving charging safety and reliability.

[0054] Optional, Figure 2 This is a heating control circuit diagram in a multifunctional integrated circuit provided by an embodiment of the present invention, for reference. Figure 1 and Figure 2The multifunctional integrated circuit heating control circuit 6 provided in this embodiment of the utility model includes: a first MOS transistor M1, a first resistor R1, and a three-terminal fuse F1;

[0055] The first terminal of the first MOSFET M1 is connected to the heating control negative serial port E_Jiare- of the microcontroller 1, the second terminal of the first MOSFET M1 is connected to the first terminal of the first resistor R1, and the third terminal of the first MOSFET M1 is connected to the heating control serial port Jiare_Ctrl.

[0056] The second end of the first resistor R1 is connected to the differential signal terminal P- of the microcontroller 1;

[0057] The first terminal of the three-terminal fuse F1 is connected to the power supply terminal VCC, the second terminal of the three-terminal fuse F1 is connected to the heating control positive serial port E_Jiare+ of the microcontroller 1, and the third terminal of the three-terminal fuse F1 is grounded.

[0058] Specifically, during the battery charging process, when the battery charging temperature drops due to factors such as ambient temperature, the first MOSFET M1 is turned on to heat the battery, so that the battery is charged under optimal temperature conditions and the charging efficiency is improved. When the battery temperature is too high, the first MOSFET M1 is turned off to cool the battery.

[0059] Furthermore, this embodiment of the invention also includes an additional three-terminal fuse F1. When a fault occurs in the first MOSFET M1 or the first resistor R1, the three-terminal fuse F1 can be blown in time to prevent damage to more circuit components.

[0060] Optionally, this embodiment of the invention also includes multiple transistors to control the on / off state of other electrical circuits;

[0061] Multiple transistors include at least a first control transistor and a second control transistor. Figure 1 (Not shown in the diagram), the base of the first control transistor is connected to the first control terminal of the microcontroller 1, the collector of the first control transistor is connected to the power supply terminal, and the emitter of the first control transistor is connected to the third terminal of the three-terminal fuse F1; the base of the second control transistor is connected to the second control terminal of the microcontroller 1, the collector of the second control transistor is connected to the third terminal of the first control transistor, and the emitter of the second control transistor is grounded. Through the two transistors, when the microcontroller 1 detects a fault in the first MOSFET M1, it promptly blows the three-terminal fuse F1 to avoid damage to more circuit components.

[0062] Multiple resistors connected in parallel are used to prevent overcurrent in other circuits by shunting the current.

[0063] Optional, Figure 3This is a detection sub-circuit diagram of a multifunctional integrated circuit provided in this embodiment of the utility model. Figure 4 This is a diagram of the mutual recognition sub-circuit in a multifunctional integrated circuit provided in this embodiment of the utility model, for reference. Figure 1 , Figure 3 and Figure 4 The detection sub-circuit 21 of the multifunctional integrated circuit provided in this embodiment of the utility model includes: a first diode D1 and a second resistor R2; the mutual recognition sub-circuit 22 includes: a first transistor Q1 and a second transistor Q2;

[0064] The anode of the first diode D1 is connected to the first terminal of the second resistor R2, and the cathode of the first diode D1 is connected to the charging detection serial port E_Charge_DET; the second terminal of the second resistor R2 is connected to the power supply terminal VCC.

[0065] The first terminal of the first transistor Q1 is connected to the power supply terminal VCC, the second terminal of the first transistor Q1 is connected to the mutual recognition output serial port OUT_HuRen, and the third terminal of the first transistor Q1 is connected to the mutual recognition communication terminal.

[0066] The first terminal of the second transistor Q2 is connected to the power supply terminal, the second terminal of the second transistor Q2 is connected to the mutual recognition input serial port, and the third terminal of the second transistor Q2 is connected to the mutual recognition communication terminal.

[0067] Specifically, when no charging current flows through, the anode voltage of the first diode D1 is pulled up to the power supply terminal voltage of 5V. When there is charging current, the cathode voltage of the first diode D1 is pulled down to about 0.3V. At this time, it can be proved that the battery is about to be charged.

[0068] Before the battery is charged, a "mutual recognition" process is performed. This involves transmitting a signal through the second terminal of the third MOSFET M3 to determine the input port for mutual recognition, and then transmitting the signal from the output port of the second MOSFET M2 to the microcontroller 1 to complete the mutual recognition of the battery.

[0069] Optionally, the detection sub-circuit 21 also includes a capacitor, and the filter circuit composed of the capacitor and the second resistor can provide a more stable current and voltage for the detection signal.

[0070] The mutual recognition sub-circuit 22 also includes multiple diodes to ensure the direction of current flow.

[0071] Figure 5 This is a communication circuit diagram in a multifunctional integrated circuit provided in this embodiment of the utility model, for reference. Figure 1 and Figure 5 Optionally, the multifunctional integrated circuit provided in this embodiment of the present invention also includes a communication circuit 3, comprising: a third transistor Q3 and a fourth transistor Q4;

[0072] The first terminal of the third transistor Q3 is connected to the power supply terminal, the second terminal of the third transistor Q3 is connected to the information receiving serial port TXD1, and the third terminal of the third transistor Q3 is connected to the 4G signal terminal of the microcontroller 1.

[0073] The first terminal of the fourth transistor Q4 is connected to the power supply terminal VCC, the second terminal of the fourth transistor Q4 is connected to the 4G signal terminal E_4G, and the third terminal of the fourth transistor Q4 is connected to the information transmission serial port RXD1.

[0074] Specifically, the third transistor Q3 in the communication circuit 3 is used to send information (i.e., send information to the microcontroller 1), and the fourth transistor Q4 in the communication circuit 3 is used to receive information (i.e. receive information sent by the microcontroller 1). A 4G signal terminal E_4G is also provided to achieve faster network communication.

[0075] Optionally, the communication circuit 3 also includes a control transistor for transmitting and a control transistor for receiving. Figure 1 (Not shown), the collector of the control transmitting transistor is connected to the control transmitting serial port of the microcontroller 1, the emitter of the control transmitting transistor is grounded, and the base of the control transmitting transistor is connected to the third terminal of the third transistor Q3; the emitter of the control receiving transistor is connected to the second terminal of the fourth transistor Q4, the base of the control receiving transistor is connected to the control receiving serial port of the microcontroller 1, and the emitter of the control receiving transistor is grounded. Information is received and transmitted through the control transmitting transistor and the control receiving transistor.

[0076] Figure 6 This is a charging control circuit diagram in a multifunctional integrated circuit provided by an embodiment of this utility model, for reference. Figure 1 and Figure 6 Optionally, the multifunctional integrated circuit provided in this embodiment of the present invention also includes a charging control circuit 4 comprising: a second MOS transistor M2 and a fifth transistor Q5;

[0077] The first terminal of the second MOSFET M2 is connected to the differential negative signal terminal P- of the microcontroller 1, the second terminal of the second MOSFET M2 is connected to the differential positive signal terminal C- of the microcontroller 1, and the third terminal of the second MOSFET M2 is connected to the third terminal of the fifth transistor Q5.

[0078] The first terminal of the fifth transistor Q5 is connected to the power supply terminal VCC, the second terminal of the fifth transistor Q5 is connected to the switching transistor driver serial port NMOS_OUT, and the third terminal of the fifth transistor Q5 is grounded.

[0079] Specifically, when the battery needs to be charged, the second MOSFET M2 is turned on to charge the battery, and when charging needs to be stopped, the second MOSFET M2 is turned off to stop charging the battery.

[0080] Optionally, the charging control circuit 4 also includes a diode and a transistor. The diode prevents reverse current flow, and the base of the transistor is connected to the NMOS control serial port of the microcontroller 1 to provide power for charging the battery by driving the transistor.

[0081] Figure 7 This is a circuit diagram of a multifunctional integrated circuit for temperature detection provided in this embodiment of the present invention. (Refer to...) Figure 1 and Figure 7 The multifunctional integrated circuit provided in this embodiment of the present invention also includes a temperature detection circuit 5 comprising: a third resistor R3 and a first capacitor C1;

[0082] The first end of the third resistor R3 is connected to the temperature detection serial port E_Temperature, and the second end of the third resistor R3 is grounded.

[0083] The first terminal of the first capacitor C1 is connected to the first terminal of the third resistor R3, and the second terminal of the first capacitor C1 is grounded.

[0084] Specifically, the battery temperature is detected by the third resistor (which can be understood as the detection resistor) in the temperature detection circuit 5.

[0085] The temperature detection circuit 5 also includes a resistor connected in series with the first resistor R3. The two resistors connected in series achieve the function of voltage division and provide overvoltage protection for the circuit.

[0086] Figure 8 This is a sampling circuit diagram in a multifunctional integrated circuit provided in this embodiment of the utility model, for reference. Figure 1 and Figure 8 Optionally, the multifunctional integrated circuit provided in this embodiment of the present invention further includes a sampling circuit 7 comprising: a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6;

[0087] The fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 are connected in parallel. The first ends of the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 are connected to the sampling input serial port SRP. The second ends of the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 are connected to the sampling output serial port SRN.

[0088] Specifically, the sampling circuit 7 samples the battery current and sends the current sampling information to the microcontroller 1. The microcontroller 1 integrates the current and calculates the battery's charge percentage.

[0089] Figure 9 This is a power supply circuit diagram of a multifunctional integrated circuit provided in this embodiment of the utility model, for reference. Figure 1 and Figure 9Optionally, the multifunctional integrated circuit provided in this embodiment of the present invention also includes a power supply circuit 8;

[0090] The power supply circuit 8 is connected to the power serial port of the microcontroller 1; the power supply circuit 8 is used to provide the microcontroller 1 with a 5V operating voltage.

[0091] Specifically, the power supply circuit 8 is connected to the power serial port of the microcontroller 1. The power supply circuit 8 provides the microcontroller 1 with a 5V operating voltage and can also provide the switching transistor in the above utility model embodiment with a 14V operating voltage.

[0092] Optionally, the power supply circuit 8 may also include a first control unit, a second control unit, a first peripheral circuit, and a second peripheral circuit;

[0093] The first peripheral circuit includes: an inductor, multiple capacitors and multiple resistors, wherein the filter circuit composed of capacitors and resistors realizes the function of filtering out noise.

[0094] The first control unit and the first peripheral circuit can generate a 14V operating voltage;

[0095] The second peripheral circuit includes three capacitors and resistors. The second control unit and the second peripheral circuit can generate a 5V operating voltage to provide the operating voltage for the switching transistor in other utility model embodiments.

[0096] Figure 10 This is a power supply voltage sampling circuit diagram in a multifunctional integrated circuit provided by an embodiment of this utility model, for reference. Figure 1 and Figure 10 The multifunctional integrated circuit provided in this embodiment of the present invention further includes: a power supply voltage sampling circuit 9; the power supply voltage sampling circuit 9 includes a seventh resistor R7 and a second capacitor C2;

[0097] The first terminal of the seventh resistor R7 is connected to the power supply voltage sampling serial port BATT_ADC of the microcontroller 1, and the second terminal of the seventh resistor R7 is grounded.

[0098] The first terminal of the second capacitor C2 is connected to the power supply terminal, and the second terminal of the second capacitor C2 is grounded.

[0099] Specifically, the voltage of the power supply circuit 8 is sampled by the power supply voltage sampling circuit 9 and transmitted to the microcontroller 1 to realize the detection of the voltage of the power supply circuit 8 and ensure the stability of the circuit.

[0100] Optionally, the power supply voltage sampling circuit 9 also includes two series resistors and a capacitor connected in parallel with the two series resistors. The two series resistors are used to achieve the voltage division function of the circuit, and the capacitor connected in parallel is used to form a filter circuit to achieve the filtering function of the circuit.

[0101] This utility model embodiment also provides an electric vehicle, including an electric vehicle body and a multifunctional integrated circuit of any of the above utility model embodiments.

[0102] The electric vehicle provided in this embodiment of the present invention can achieve the same technical effect as the multifunctional integrated circuit provided in any of the above embodiments of the present invention, and will not be described again here.

[0103] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multifunctional integrated circuit, characterized in that, include: Microcontroller, charging trigger mutual recognition circuit, communication circuit, charging control circuit, temperature detection circuit, heating control circuit and sampling circuit; The charging trigger mutual recognition circuit includes: a detection sub-circuit and a mutual recognition sub-circuit; The microcontroller's charging detection serial port is connected to the charging detection terminal of the detection sub-circuit; the microcontroller's mutual recognition input serial port is connected to the mutual recognition output terminal of the mutual recognition sub-circuit; and the mutual recognition input terminal of the mutual recognition sub-circuit is connected to the microcontroller's mutual recognition output serial port. The microcontroller's information transmission serial port is connected to the information receiving end of the communication circuit, and the microcontroller's information receiving serial port is connected to the information transmission end of the communication circuit. The microcontroller's switch-driven serial port is connected to the switch-driven terminal of the charging control circuit. The temperature detection serial port of the microcontroller is connected to the temperature detection terminal of the temperature detection circuit. The heating control serial port of the microcontroller is connected to the heating control terminal of the heating control circuit; The sampling input serial port of the microcontroller is connected to the sampling output terminal of the sampling circuit, and the sampling output serial port of the microcontroller is connected to the sampling input terminal of the sampling circuit.

2. The multifunctional integrated circuit according to claim 1, characterized in that, The heating control circuit includes: a first MOSFET, a first resistor, and a three-terminal fuse; The first terminal of the first MOSFET is connected to the heating control negative serial port of the microcontroller, the second terminal of the first MOSFET is connected to the first terminal of the first resistor, and the third terminal of the first MOSFET is connected to the heating control serial port. The second end of the first resistor is connected to the differential signal terminal of the microcontroller; The first terminal of the three-terminal fuse is connected to the power supply terminal, the second terminal of the three-terminal fuse is connected to the heating control positive serial port of the microcontroller, and the third terminal of the three-terminal fuse is grounded.

3. The multifunctional integrated circuit according to claim 1, characterized in that, The detection sub-circuit includes a first diode and a second resistor; the mutual recognition sub-circuit includes a first transistor and a second transistor. The anode of the first diode is connected to the first end of the second resistor, and the cathode of the first diode is connected to the charging detection serial port; the second end of the second resistor is connected to the power supply terminal. The first end of the first transistor is connected to the power supply terminal, the second end of the first transistor is connected to the mutual recognition output serial port, and the third end of the first transistor is connected to the mutual recognition communication terminal. The first end of the second transistor is connected to the power supply terminal, the second end of the second transistor is connected to the mutual recognition input serial port, and the third end of the second transistor is connected to the mutual recognition communication terminal.

4. The multifunctional integrated circuit according to claim 1, characterized in that, The communication circuit includes: a third transistor and a fourth transistor; The first end of the third transistor is connected to the power supply terminal, the second end of the third transistor is connected to the information receiving serial port, and the third end of the third transistor is connected to the 4G signal terminal of the microcontroller. The first end of the fourth transistor is connected to the power supply terminal, the second end of the fourth transistor is connected to the 4G signal terminal, and the third end of the fourth transistor is connected to the information transmission serial port.

5. The multifunctional integrated circuit according to claim 1, characterized in that, The charging control circuit includes: a second MOSFET and a fifth transistor; The first terminal of the second MOS transistor is connected to the differential negative signal terminal of the microcontroller, the second terminal of the second MOS transistor is connected to the differential positive signal terminal of the microcontroller, and the third terminal of the second MOS transistor is connected to the third terminal of the fifth transistor. The first terminal of the fifth transistor is connected to the power supply terminal, the second terminal of the fifth transistor is connected to the serial port of the switch driver, and the third terminal of the fifth transistor is grounded.

6. The multifunctional integrated circuit according to claim 1, characterized in that, The temperature detection circuit includes: a third resistor and a first capacitor; The first end of the third resistor is connected to the temperature detection serial port, and the second end of the third resistor is grounded. The first terminal of the first capacitor is connected to the first terminal of the third resistor, and the second terminal of the first capacitor is grounded.

7. The multifunctional integrated circuit according to claim 1, characterized in that, The sampling circuit includes: a fourth resistor, a fifth resistor, and a sixth resistor; The fourth resistor, the fifth resistor, and the sixth resistor are connected in parallel. The first ends of the fourth resistor, the fifth resistor, and the sixth resistor are all connected to the sampling input serial port, and the second ends of the fourth resistor, the fifth resistor, and the sixth resistor are all connected to the sampling output serial port.

8. The multifunctional integrated circuit according to claim 1, characterized in that, Also includes: Power supply circuit; The power supply circuit is connected to the power serial port of the microcontroller; the power supply circuit is used to provide the microcontroller with a 5V operating voltage.

9. The multifunctional integrated circuit according to claim 8, characterized in that, Also includes: A power supply voltage sampling circuit; the power supply voltage sampling circuit includes a seventh resistor and a second capacitor; The first end of the seventh resistor is connected to the power supply voltage sampling serial port of the microcontroller, and the second end of the seventh resistor is grounded. The first terminal of the second capacitor is connected to the power supply terminal, and the second terminal of the second capacitor is grounded.

10. An electric vehicle, characterized in that, It includes the electric vehicle body and the multifunctional integrated circuit as described in any one of claims 1-9.

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