Electric two-wheeled vehicle

Abstract

The application provides an electric two-wheeled vehicle, comprising a battery module, a pulse self-heating circuit, a first unidirectional conducting module, a capacitive or resistive-capacitive load circuit, a motor and a wheel; a first end of the pulse self-heating circuit is connected to a first pole of the battery module, and a second end of the pulse self-heating circuit is connected to a second pole of the battery module; the pulse self-heating circuit is used for reversely flowing battery electric energy flowing out of the battery module to the battery module to form a pulse current repeatedly flowing in and out of the battery module; an input end of the first unidirectional conducting module is connected to the first end of the pulse self-heating circuit and the first pole of the battery module; and an output end of the first unidirectional conducting module is used for connecting a first end of the load circuit; the first unidirectional conducting module is used for allowing the pulse self-heating circuit to reversely flow the battery electric energy to the capacitive load current, preventing electric energy of the capacitive load current from flowing to the pulse self-heating circuit, reducing an influence of the load circuit on the pulse self-heating circuit, reducing a loss of the pulse self-heating circuit and improving a heating efficiency of the pulse self-heating circuit.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an electric two-wheeled vehicle. Background Art

[0002] In low-temperature environments, battery performance will decline, such as charging and discharging capabilities and battery capacity. This is why battery pulse self-heating technology was developed. Battery pulse self-heating technology generates heat energy through the internal resistance of the battery.

[0003] The battery pulse self-heating circuit is connected to the battery, and the pulse self-heating circuit reversely flows the battery's electrical energy back to the battery to achieve heating of the battery.

[0004] However, when the battery pulse self-heating circuit is applied to some battery-powered devices, such as electric vehicles, when the battery pulse self-heating circuit is working, due to the working principle and working mode of the pulse self-heating circuit, it will affect the load circuit and the charging circuit, resulting in additional losses. Summary of the Invention

[0005] The present application provides an electric two-wheeled vehicle, which is used to reduce the impact of a load circuit on a pulse self-heating circuit and reduce the loss of the pulse self-heating circuit.

[0006] In a first aspect, the present application provides an electric two-wheeled vehicle, comprising:

[0007] A battery module, a pulse self-heating circuit, a first unidirectional conduction module, a load circuit, a motor, and a wheel; the load circuit includes a motor drive circuit, the motor drive circuit is used to provide a drive signal to the motor, and the motor is used to drive the wheel to rotate; the load circuit is capacitive or resistive-capacitive;

[0008] The first end of the pulse self-heating circuit is connected to the first electrode of the battery module, and the second end of the pulse self-heating circuit is connected to the second electrode of the battery module;

[0009] The pulse self-heating circuit includes a third switch module, an inductor module, a fourth switch module, and a capacitor module; the first end of the third switch module serves as the first end of the pulse self-heating circuit, the second end of the third switch module is connected to the first end of the inductor module, the second end of the inductor module is connected to the first end of the capacitor module and the first end of the fourth switch module, and the second end of the capacitor module is connected to the second end of the fourth switch module to serve as the second end of the pulse self-heating circuit;

[0010] The third switch module is used to control whether the pulse self-heating circuit is in an operating state, and the fourth switch module is used to control whether the capacitor module is bypassed; the inductor module is used to temporarily store the electric energy from the battery module when the third switch module and the fourth switch module are in an on state, and transfer the temporarily stored electric energy from the battery module to the capacitor module when the fourth switch module is in an off state; the capacitor module is used to temporarily store the electric energy from the inductor module when the fourth switch module is in an off state, and reversely flow the electric energy from the inductor module to the inductor module; the inductor module is further used to flow the electric energy reversely flowing from the capacitor module to the inductor module back to the battery module when the fourth switch module is on, so that the pulse self-heating circuit reversely flows the battery electric energy flowing out of the battery module to the battery module to form a pulse current that repeatedly enters and exits the battery module;

[0011] The input end of the first unidirectional conduction module is connected to the first end of the pulse self-heating circuit and the first pole of the battery module, the output end of the first unidirectional conduction module is used to connect the first end of the load circuit, and the second pole of the battery module and the second end of the pulse self-heating circuit are used to connect the second end of the load circuit; the first unidirectional conduction module is used to allow the pulse self-heating circuit to reversely flow the battery power to the load circuit, and prevent the power of the load circuit from flowing to the pulse self-heating circuit.

[0012] Optionally, the first unidirectional conduction module includes a first diode;

[0013] The anode of the first diode serves as the input end of the first unidirectional conduction module, connecting the first end of the pulse self-heating circuit and the first electrode of the battery module;

[0014] The cathode of the first diode serves as the output end of the first unidirectional conduction module and is used to connect to the first end of the load circuit.

[0015] Optionally, it further includes a first switch module connected in parallel with the first unidirectional conduction module;

[0016] When the pulse self-heating circuit and the load circuit are working, the first switch module is disconnected to control the first unidirectional conduction module to be in a working state;

[0017] When the pulse self-heating circuit stops working, the first switch module is closed to control the first unidirectional conduction module to be bypassed.

[0018] Optionally, it further includes a second unidirectional conduction module and a charging circuit;

[0019] The output end of the second unidirectional conduction module is connected to the first end of the pulse self-heating circuit and the first terminal of the battery module; the input end of the second unidirectional conduction module is used to connect to the first end of the charging circuit; the second terminal of the battery module and the second end of the pulse self-heating circuit are used to connect to the second end of the charging circuit;

[0020] The second unidirectional conduction module is used to allow the electric energy of the charging circuit to flow to the pulse self-heating circuit and prevent the pulse self-heating circuit from reversely flowing the battery electric energy to the charging circuit.

[0021] Optionally, it further includes a first switch module connected in parallel with the first unidirectional conducting module and / or a second switch module connected in parallel with the second unidirectional conducting module;

[0022] When the pulse self-heating circuit and the load circuit are working, the first switch module is disconnected to control the first unidirectional conduction module to be in a working state;

[0023] When the pulse self-heating circuit and the charging circuit are working, the second switch module is disconnected to control the first unidirectional conduction module to be in a working state;

[0024] When the pulse self-heating circuit stops working, the first switch module and the second switch module are closed to control the first unidirectional conduction module and the second unidirectional conduction module to be bypassed.

[0025] Optionally, the method further includes a charging circuit, a second unidirectional conducting module, a first switch module connected in parallel with the first unidirectional conducting module, and a second switch module connected in parallel with the second unidirectional conducting module;

[0026] The output end of the second one-way conducting module is connected to the output end of the first one-way conducting module, and the input end of the second one-way conducting module is used to connect the first end of the load circuit and the first end of the charging circuit, or the input end of the second one-way conducting module is connected to the input end of the first one-way conducting module, the output end of the first one-way conducting module is used to connect the first end of the load circuit and the first end of the charging circuit, and the output end of the second one-way conducting module is connected to the first electrode of the battery module and the first end of the pulse self-heating circuit;

[0027] The second terminal of the battery module and the second end of the pulse self-heating circuit are used to connect the second end of the load circuit and the second end of the charging circuit; the second unidirectional conduction module is used to allow the power of the charging circuit to flow to the pulse self-heating circuit and prevent the pulse self-heating circuit from reversely flowing the battery power to the charging circuit;

[0028] When the pulse self-heating circuit and the load circuit are working, the first switch module is disconnected to control the first unidirectional conduction module to be in a working state;

[0029] When the pulse self-heating circuit and the charging circuit are working, the second switch module is disconnected to control the first unidirectional conduction module to be in a working state;

[0030] When the pulse self-heating circuit stops working, the first switch module and the second switch module are closed to control the first unidirectional conduction module and the second unidirectional conduction module to be bypassed.

[0031] Optionally, the first unidirectional conduction module includes a first diode, and the second unidirectional conduction module includes a second diode;

[0032] The anode of the first diode serves as the input end of the first unidirectional conduction module, and the cathode of the first diode serves as the output end of the first unidirectional conduction module;

[0033] The anode of the second diode serves as the input end of the second unidirectional conduction module, and the cathode of the second diode serves as the output end of the second unidirectional conduction module.

[0034] Optionally, the third switch module includes a first MOS transistor, the fourth switch module includes a second MOS transistor, the inductor module includes an inductor element, and the capacitor module includes a capacitor element.

[0035] Optionally, the first MOS transistor and the second MOS transistor are N-type MOS transistors;

[0036] The gate of the first MOS transistor is used to receive a first control signal, the source of the first MOS transistor serves as the first end of the third switch module, and the drain of the first MOS transistor serves as the second end of the third switch module;

[0037] The gate of the second MOS transistor is used to receive the second control signal, the source of the second MOS transistor serves as the first end of the fourth switch module, and the drain of the second MOS transistor serves as the second end of the fourth switch module;

[0038] The first end of the inductor element is connected to the drain of the first MOS transistor, and the second end of the inductor element is connected to the first end of the capacitor element and the source of the second MOS transistor;

[0039] The second end of the capacitor is connected to the drain of the second MOS transistor.

[0040] Optionally, the pulse self-heating circuit further includes: a fifth switch module and a resistance module;

[0041] The first end of the resistor module is connected to the first end of the capacitor module, the second end of the resistor module is connected to the first end of the fifth switch module, and the second end of the fifth switch module is connected to the second end of the inductor module;

[0042] The fifth switch module is configured to be controlled to be turned on when the third switch module and the fourth switch module are in an off state, so as to consume the residual charge in the capacitor module;

[0043] and / or,

[0044] The pulse self-heating circuit further includes: a freewheeling diode; an output end of the freewheeling diode is connected to the second end of the third switch module and the first end of the inductor module, and an input end of the freewheeling diode is connected to the second end of the capacitor module and the second end of the fourth switch module;

[0045] The freewheeling diode is used to provide a freewheeling circuit for the inductor module when the third switch module is abnormally disconnected;

[0046] and / or,

[0047] The first electrode of the battery module is a positive electrode, and the second electrode of the battery module is a negative electrode.

[0048] Optionally, a pulse self-heating control module is also included;

[0049] The pulse self-heating control module is connected to the pulse self-heating circuit and is used to control whether the pulse self-heating circuit is in a working state;

[0050] The pulse self-heating control module is also connected to the first switch module and the second switch module, and is used to control the on and off states of the first switch module and the second switch module.

[0051] Optionally, it further includes a battery management system control module connected to the pulse self-heating control module, and a temperature detection module connected to the battery management system control module, wherein the temperature detection module is used to detect the temperature of the battery module;

[0052] The battery management system control module is used to control whether the pulse self-heating control module is in a working state according to the temperature of the battery module detected by the temperature detection module.

[0053] In a second aspect, the present application provides an electric two-wheeled vehicle, comprising: a battery module, a pulse self-heating circuit, a unidirectional conduction module, a charging circuit, a motor drive circuit, a motor, and a wheel; the motor drive circuit is used to provide a drive signal to the motor, and the motor is used to drive the wheel to rotate; the battery module is used to power the motor drive circuit and the motor; the charging circuit is used to charge the battery module;

[0054] The first end of the pulse self-heating circuit is connected to the first electrode of the battery module, and the second end of the pulse self-heating circuit is connected to the second electrode of the battery module;

[0055] The pulse self-heating circuit includes a third switch module, an inductor module, a fourth switch module, and a capacitor module; the first end of the third switch module serves as the first end of the pulse self-heating circuit, the second end of the third switch module is connected to the first end of the inductor module, the second end of the inductor module is connected to the first end of the capacitor module and the first end of the fourth switch module, and the second end of the capacitor module is connected to the second end of the fourth switch module to serve as the second end of the pulse self-heating circuit;

[0056] The third switch module is used to control whether the pulse self-heating circuit is in an operating state, and the fourth switch module is used to control whether the capacitor module is bypassed; the inductor module is used to temporarily store the electric energy from the battery module when the third switch module and the fourth switch module are in an on state, and transfer the temporarily stored electric energy from the battery module to the capacitor module when the fourth switch module is in an off state; the capacitor module is used to temporarily store the electric energy from the inductor module when the fourth switch module is in an off state, and reversely flow the electric energy from the inductor module to the inductor module; the inductor module is further used to flow the electric energy reversely flowing from the capacitor module to the inductor module back to the battery module when the fourth switch module is on, so that the pulse self-heating circuit reversely flows the battery electric energy flowing out of the battery module to the battery module to form a pulse current that repeatedly enters and exits the battery module;

[0057] The output end of the unidirectional conduction module is connected to the first end of the pulse self-heating circuit and the first pole of the battery module, the input end of the unidirectional conduction module is used to connect the first end of the charging circuit, and the second pole of the battery module and the second end of the pulse self-heating circuit are used to connect the second end of the charging circuit; the unidirectional conduction module is used to allow the electric energy of the charging circuit to flow to the pulse self-heating circuit, and prevent the pulse self-heating circuit from reversely flowing the battery electric energy to the charging circuit.

[0058] The solution of the present application, by setting a unidirectional conduction module between the pulse self-heating circuit and the charging circuit, prevents the electric energy of the pulse self-heating circuit from flowing to the charging circuit, reduces the impact of the pulse self-heating circuit on the charging circuit, reduces the loss of the pulse self-heating circuit, and improves the heating efficiency of the pulse self-heating circuit.

[0059] Optionally, the unidirectional conduction module includes a diode;

[0060] The anode of the diode serves as the input end of the unidirectional conduction module and is used to connect to the first end of the charging circuit;

[0061] The cathode of the diode serves as the output end of the unidirectional conduction module and is connected to the first end of the pulse self-heating circuit and the first electrode of the battery module.

[0062] Optional,

[0063] The electric two-wheeled vehicle further comprises a switch module connected in parallel with the one-way conducting module, the switch module being used to control whether the one-way conducting module is bypassed;

[0064] and / or,

[0065] The first electrode of the battery module is a positive electrode, and the second electrode of the battery module is a negative electrode.

[0066] The electric two-wheeled vehicle provided by the present application includes a battery module, a pulse self-heating circuit, a first unidirectional conduction module, a load circuit, a motor and a wheel; the load circuit includes a motor drive circuit, the motor drive circuit is used to provide a drive signal to the motor, and the motor is used to drive the wheel to rotate; the load circuit is capacitive or resistive-capacitive; the first end of the pulse self-heating circuit is connected to the first pole of the battery module, and the second end of the pulse self-heating circuit is connected to the second pole of the battery module; the pulse self-heating circuit includes a third switch module, an inductor module, a fourth switch module and a capacitor module; the first end of the third switch module serves as the first end of the pulse self-heating circuit, the second end of the third switch module is connected to the first end of the inductor module, the second end of the inductor module is connected to the first end of the capacitor module and the first end of the fourth switch module, and the second end of the capacitor module is connected to the second end of the fourth switch module to serve as the second end of the pulse self-heating circuit; the third switch module is used to control whether the pulse self-heating circuit is in a working state, and the fourth switch module is used to control whether the capacitor module is bypassed; The inductor module is used to temporarily store the electric energy from the battery module when the third switch module and the fourth switch module are in the on state, and transfer the temporarily stored electric energy from the battery module to the capacitor module when the fourth switch module is in the off state; the capacitor module is used to temporarily store the electric energy from the inductor module when the fourth switch module is in the off state, and reversely flow the electric energy from the inductor module to the inductor module; the inductor module is also used to flow the electric energy reversely flowing from the capacitor module to the inductor module back to the battery module when the fourth switch module is on, so that the pulse self-heating circuit reversely flows the battery electric energy flowing out of the battery module to the battery module to form a pulse current that repeatedly enters and exits the battery module; the input end of the first unidirectional conduction module is connected to the first end of the pulse self-heating circuit and the first pole of the battery module, and the output end of the first unidirectional conduction module is used to connect the first end of the load circuit; the first unidirectional conduction module is used to allow the pulse self-heating circuit to reversely flow the battery electric energy to the capacitive load current, and prevent the electric energy of the capacitive load current from flowing to the pulse self-heating circuit. The solution of the present application sets a unidirectional conduction module between the pulse self-heating circuit and the load circuit to prevent the electric energy of the load circuit from flowing to the pulse self-heating circuit, thereby reducing the impact of the load circuit on the pulse self-heating circuit, reducing the loss of the pulse self-heating circuit, and improving the heating efficiency of the pulse self-heating circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0068] Figures 1-19 A circuit diagram of an electric two-wheeled vehicle provided in accordance with an embodiment of the present application. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below in conjunction with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below in conjunction with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0070] As described in the background art, when the battery pulse self-heating circuit is working, due to the working principle and working mode of the pulse self-heating circuit, it will affect the load circuit and generate additional losses.

[0071] To this end, the present application provides an electric two-wheeled vehicle, in which a unidirectional conduction module is connected between the pulse self-heating circuit and the load circuit, and the load circuit is capacitive or resistive-capacitive. The unidirectional conduction module allows the pulse self-heating circuit to reversely flow the battery power to the load circuit, preventing the power of the load circuit from flowing to the pulse self-heating circuit, reducing the impact of the load circuit on the pulse self-heating circuit, reducing the loss of the pulse self-heating circuit, and improving the heating efficiency of the pulse self-heating circuit.

[0072] The following specific embodiments are used to describe the technical solution of the present application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0073] First embodiment

[0074] Figure 1 FIG1 shows a circuit diagram of an electric two-wheeled vehicle provided in one embodiment of the present application. Figure 2 FIG1 shows a circuit diagram of a pulse self-heating circuit provided by an embodiment of the present application. Figure 1 and Figure 2 As shown, the electric two-wheeled vehicle of this embodiment includes:

[0075] Battery module 103, pulse self-heating circuit 101, first unidirectional conduction module 102, load circuit 104, motor and wheel; load circuit 104 includes a motor drive circuit, which is used to provide a drive signal to the motor, and the motor is used to drive the wheel to rotate; load circuit 104 is capacitive or resistive-capacitive;

[0076] A first end of the pulse self-heating circuit 101 is connected to a first electrode of the battery module 103 , and a second end of the pulse self-heating circuit 101 is connected to a second electrode of the battery module 103 ;

[0077] The pulse self-heating circuit 101 includes a third switch module 1011, an inductor module 1012, a fourth switch module 1013, and a capacitor module 1014. The first end of the third switch module 1011 serves as the first end of the pulse self-heating circuit 101. The second end of the third switch module 1011 is connected to the first end of the inductor module 1012. The second end of the inductor module 1012 is connected to the first end of the capacitor module 1014 and the first end of the fourth switch module 1013. The second end of the capacitor module 1014 is connected to the second end of the fourth switch module 1013, serving as the second end of the pulse self-heating circuit 101.

[0078] The third switch module 1011 is used to control whether the pulse self-heating circuit 101 is in an operating state, and the fourth switch module 1013 is used to control whether the capacitor module 1014 is bypassed. The inductor module 1012 is used to temporarily store the electrical energy from the battery module 103 when the third switch module 1011 and the fourth switch module 1013 are in an on state, and temporarily store the electrical energy from the inductor module 1012 when the fourth switch module 1013 is in an off state, and reversely flow the electrical energy from the inductor module 1012 to the inductor module 1012. The inductor module 1012 is also used to flow the electrical energy that reversely flows from the capacitor module 1014 to the inductor module 1012 back to the battery module 103 when the fourth switch module 1013 is on, so that the pulse self-heating circuit 101 reversely flows the battery electrical energy flowing out of the battery module 103 to the battery module 103, thereby forming a pulse current that repeatedly enters and exits the battery module 103.

[0079] The input end of the first unidirectional conduction module 102 is connected to the first end of the pulse self-heating circuit 101 and the first pole of the battery module 103, the output end of the first unidirectional conduction module 102 is used to connect the first end of the load circuit 104, the second pole of the battery module 103 and the second end of the pulse self-heating circuit 101 are used to connect the second end of the load circuit 104; the first unidirectional conduction module 102 is used to allow the pulse self-heating circuit 101 to reversely flow the battery power to the load circuit 104, and prevent the power of the load circuit 104 from flowing to the pulse self-heating circuit 101.

[0080] For example, the electric two-wheeled vehicle may include an electric bicycle, an electric motorcycle, an electric scooter, and the like.

[0081] In an embodiment of the present application, the battery module 103 is connected to both ends of the load circuit 104, and the battery module 103 is used to power the load circuit 104. The load circuit 104 can be a capacitive load circuit or a resistive-capacitive load circuit, wherein a capacitive load refers to a load with capacitive characteristics in a circuit, and a capacitor is the main component constituting the capacitive load. A resistive-capacitive load refers to a load with both resistive and capacitive characteristics, and the load circuit has both a resistive element and a capacitor connected in parallel therewith. For example, the battery module 103 can include one or more battery packs, and these battery packs can be the same or similar. The load circuit 104 includes a motor drive circuit (not shown in the figure), which is used to provide a drive signal to the motor so that the motor drives the wheels to rotate. The load circuit 104 can be, for example, a motor controller in an electric vehicle, and the motor controller often contains a capacitor or is capacitive or resistive-capacitive.

[0082] In a low temperature environment, the battery performance of the battery module 103 will decline. Therefore, a pulse self-heating circuit 101 is connected to both ends of the battery module 103. The pulse self-heating circuit 101 is used to reverse the battery power flowing out of the battery module 103 to the battery module 103 to form a pulse current that repeatedly flows in and out of the battery module 103, so that the energy of the battery module 103 continuously flows out of the battery module 103 and flows back to the battery module 103. Combined with the internal resistance of the battery module 103, the battery module 103 is heated. For example, the first end of the pulse self-heating circuit 101 is connected to the first pole of the battery module 103, and the second end of the pulse self-heating circuit 101 is connected to the second pole of the battery module 103 and the second end of the load circuit 104, wherein the first pole can be a positive pole and the second pole can be a negative pole. In other examples, the first pole can be a negative pole and the second pole can be a positive pole.

[0083] However, when the load circuit 104 and the pulse self-heating circuit 101 operate simultaneously, the capacitor in the load circuit 104 may affect the control and operation of the pulse self-heating circuit 101 , affecting the heating effect and heating efficiency of the pulse self-heating circuit 101 .

[0084] In the embodiment of the present application, a first unidirectional conduction module 102 is connected between the first end of the pulse self-heating circuit 101 and the first end of the load circuit 104. The first unidirectional conduction module 102 allows the pulse self-heating circuit 101 to reversely transfer battery power to the load circuit 104, and prevents power from the load circuit 104 from flowing to the pulse self-heating circuit 101. Furthermore, because the first unidirectional conduction module 102 prevents power from the capacitive load current from flowing to the pulse self-heating circuit 101, the loss of the load circuit 104 is reduced, and energy loss in the equivalent capacitance of the load circuit 104 is prevented.

[0085] The specific principle of the first unidirectional conduction module 102 preventing the electric energy of the load circuit 104 from flowing to the pulse self-heating circuit 101 is as follows: when the load circuit 104 is operating normally, the internal resistance of the load is larger and the internal resistance of the battery is smaller. The pulse current of the pulse self-heating circuit 101 is AC, and its positive half-wave (a small amount of energy) reaches the capacitor of the load circuit 104. During the negative half-wave, the first unidirectional conduction module 102 blocks the energy in the load circuit 104 from flowing to the pulse self-heating circuit 101 (blocking the capacitor in the load circuit 104 from charging the pulse self-heating circuit 101), thereby reducing the impact of the load circuit 104 on the pulse self-heating circuit 101. The positive half-wave here can be understood as the direction of the outflow current of the pulse self-heating circuit 101, and the negative half-wave can be understood as the direction of the inflow current of the pulse self-heating circuit 101.

[0086] In addition, the first unidirectional conduction module 102 allows the battery power of the battery module 103 to flow to the load circuit 104 and prevents the power of the load circuit 104 from flowing to the battery module 103 , thereby reducing the loss of the load circuit 104 .

[0087] In other embodiments, the mutual influence between the pulse self-heating circuit 101 and the load circuit 104 is isolated by inductance. When using inductance for isolation, it is necessary to calculate the filtering (LC) constant of the inductor and the capacitor in the isolated load circuit 104. Only the matching filtering constant can play the role of isolation. If the capacitance in the isolated load circuit 104 changes, it is necessary to recalculate the filtering constant. The first unidirectional conduction module 102 is used to isolate the pulse self-heating circuit 101 and the load circuit 104. Since it is fully conductive in one direction, there is no need to calculate the filtering constant. Even if the capacitance in the load circuit 104 changes, it will not be affected.

[0088] The pulse self-heating circuit can form a pulse current through an inductance module and a capacitance module, or can form a pulse current through appropriate switch control.

[0089] In some embodiments, as Figure 3As shown, the third switch module 1011 includes a first MOS tube Q1, the fourth switch module 1013 includes a second MOS tube Q2, the inductor module 1012 includes an inductor L1, and the capacitor module 1014 includes a capacitor C1. The gate of the first MOS tube Q1 receives a first control signal A, the first end of the first MOS tube Q1 serves as the first end of the third switch module 1011, the second end of the first MOS tube Q1 is connected to the first end of the inductor L1, the second end of the inductor L1 is connected to the first end of the capacitor C1 and the first end of the second MOS tube Q2, the second end of the capacitor C1 is connected to the second end of the second MOS tube Q2, and the gate of the second MOS tube Q2 receives a second control signal B. In practical applications, the use of MOS tubes in the pulse self-heating circuit 101 is more suitable for the self-heating of small-capacity batteries such as electric two-wheel vehicles.

[0090] The first MOS tube Q1 controls whether the entire pulse self-heating circuit 101 is in a working state, and the second MOS tube Q2 controls the transfer of energy between the inductor L1 and the capacitor C1. Specifically, in the first stage, the first MOS tube Q1 and the second MOS tube Q2 are closed at the same time, and the battery module 103 charges the inductor L1; the second MOS tube Q2 is turned off when the inductor L1 reaches the controlled peak current, at which time the energy of the inductor L1 is transferred to the capacitor C1, and the energy of the inductor L1 is continuously transferred to the capacitor C1, and the voltage across the capacitor C1 continuously increases, and when the current of the inductor L1 gradually approaches 0, the voltage of the capacitor C1 reaches a maximum; in the second stage, the energy of the capacitor C1 flows reversely to the inductor L1, and the current of the inductor L1 continuously rises to a reverse maximum, and at this time the voltage of the capacitor C1 drops to a minimum point close to 0; in the third stage, the second MOS tube Q2 is closed when the voltage of the capacitor C1 drops to the minimum point, and the energy of the inductor L1 flows to the battery module 103, and the current of the inductor L1 reversely maximizes and gradually approaches 0. When the current of the inductor L1 gradually increases from approaching 0, the battery module 103 charges the inductor L1, and such a reciprocating operation realizes repeated charging and discharging of the battery module 103. The reciprocating frequency can be determined according to the filter time constant of the inductor L1 and the capacitor C1.

[0091] In a specific application, the first MOS transistor Q1 and the second MOS transistor Q2 are N-type MOS transistors. The gate of the first MOS transistor Q1 is used to receive the first control signal A, the source of the first MOS transistor Q1 serves as the first end of the third switch module 1011, and the drain of the first MOS transistor Q1 serves as the second end of the third switch module 1011. The gate of the second MOS transistor Q2 is used to receive the second control signal B, the source of the second MOS transistor Q2 serves as the first end of the fourth switch module 1013, and the drain of the second MOS transistor Q2 serves as the second end of the fourth switch module 1013. The first end of the inductor element L1 is connected to the drain of the first MOS transistor Q1, the second end of the inductor element L1 is connected to the first end of the capacitor element C1 and the source of the second MOS transistor Q2, and the second end of the capacitor element C1 is connected to the drain of the second MOS transistor Q2. In other examples, the first MOS transistor Q1 and the second MOS transistor Q2 may also be P-type MOS transistors.

[0092] In some examples, such as Figure 4 As shown, the pulse self-heating circuit 101 may further include a fifth switch module and a resistor module. The first end of the resistor module is connected to the first end of the capacitor module 1014, the second end of the resistor module is connected to the first end of the fifth switch module, and the second end of the fifth switch module is connected to the second end of the inductor module 1012. The fifth switch module is configured to be controlled to be turned on when the third switch module 1011 and the fourth switch module 1013 are in the off state, so as to consume the residual charge in the capacitor module 1014. Due to various reasons, the capacitor module 1014 may be charged, which may hinder the initiation of LC resonance in the pulse self-heating circuit 101. Therefore, before the third switch module 1011 and the fourth switch module 1013 are closed, the fifth switch module is used to consume the charge on the capacitor module 1014. Thereafter, during the resonance process, the third switch module 1011 remains in the off state and does not affect the resonance.

[0093] Specifically, the fifth switch module may include a third MOS transistor Q3. The gate of the third MOS transistor Q3 receives a third control signal C. The first end of the third MOS transistor Q3 serves as the first end of the fifth switch module, and the second end of the third MOS transistor Q3 serves as the second end of the fifth switch module. The resistor module may include a resistor element R. The third MOS transistor Q3 may be an NMOS transistor. The first electrode of the third MOS transistor Q3 serves as a source, and the second electrode serves as a drain.

[0094] In some examples, such as Figure 5As shown, the pulse self-heating circuit 101 may further include a freewheeling diode D3. The output end of the freewheeling diode D3 is connected to the second end of the third switch module 1011 and the second end of the inductor module 1012, and the input end of the freewheeling diode D3 is connected to the second end of the capacitor module 1014 and the second end of the fourth switch module 1013. The freewheeling diode D3 is used to provide a freewheeling circuit for the inductor module 1012 when the third switch module 1011 is abnormally disconnected, thereby preventing sudden current changes and protecting other components in the pulse self-heating circuit 101 from overvoltage.

[0095] In some embodiments, as Figure 6 As shown, the first unidirectional conduction module 102 includes a first diode D1. The anode of the first diode D1 serves as the input terminal of the first unidirectional conduction module 102, connecting the first terminal of the pulse self-heating circuit 101 and the first electrode of the battery module 103. The cathode of the first diode D1 serves as the output terminal of the first unidirectional conduction module 102, connected to the first terminal of the load circuit 104. When the pulse self-heating circuit 101 and the load circuit 104 are operating simultaneously, the first diode D1 allows the pulse self-heating circuit 101 to reversely transfer battery power to the load circuit 104, while preventing power from the load circuit 104 from flowing to the pulse self-heating circuit 101. The first unidirectional conduction module 102 can also be implemented using other circuit modules or devices capable of unidirectional conduction.

[0096] In some embodiments, as Figure 7 As shown, the electric two-wheeled vehicle further includes a first switch module 105 connected in parallel with the first unidirectional conduction module 102. The first switch module 105 is used to control whether the first unidirectional conduction module 102 is bypassed. Specifically, when the first switch module 105 is closed, the first unidirectional conduction module 102 is bypassed. When the first switch module 105 is open, the first unidirectional conduction module 102 is not bypassed and is in an operating state. For example, when the pulse self-heating circuit 101 is not operating, the first switch module 105 can be closed to short-circuit the first unidirectional conduction module 102, so that the battery module 103 is directly connected to the load circuit 104, thereby reducing the loss caused by the first unidirectional conduction module 102.

[0097] In other embodiments, the first unidirectional conduction module 102 and the first switch module 105 may include MOS transistors, which replace the circuit in which the first unidirectional conduction module 102 and the first switch module 105 are connected in parallel. The MOS transistor here may be an NMOS transistor or a PMOS transistor. When the MOS transistor here is an NMOS transistor, the source of the NMOS transistor is connected to the positive electrode of the battery module 103, the drain of the NMOS transistor is connected to the load circuit 104, and the gate of the NMOS transistor is the switch control terminal; when the MOS transistor here is a PMOS transistor, the drain of the PMOS transistor is connected to the positive electrode of the battery module 103, the source of the PMOS transistor is connected to the load circuit 104, and the gate of the PMOS transistor is the switch control terminal. Other devices and circuits may also be used to replace the circuit in which the first unidirectional conduction module 102 and the first switch module 105 are connected in parallel, such as thyristors, IGBTs (Insulated-Gate Bipolar Transistors), etc.

[0098] In practical applications, the battery module 103 may also be connected to a charging circuit 107. For example, the second terminal of the battery module 103 and the second end of the pulse self-heating circuit 101 are connected to the second end of the charging circuit 107. The charging circuit 107 is used to charge the battery module 103. The charging circuit 107 can perform voltage or current conversion processing. The specific output port of the charging circuit 107 is typically capacitive or resistive-capacitive. When the pulse self-heating circuit 101 is operating, the battery power in the pulse self-heating circuit 101 flows back to the charging circuit 107. The high-frequency pulse current and pulsating voltage of the pulse self-heating circuit 101 will interfere with the normal operation of the charging circuit 107, increasing the loss of the charging circuit 107.

[0099] In some embodiments, as Figure 8As shown, the electric two-wheeled vehicle further includes a second unidirectional conduction module 106. The output end of the second unidirectional conduction module is connected to the first end of the pulse self-heating circuit 101 and the first electrode of the battery module 103. The input end of the second unidirectional conduction module 106 is connected to the first end of the charging circuit 107. The second unidirectional conduction module 106 is used to allow the electric energy of the charging circuit 107 to flow to the pulse self-heating circuit 101 and prevent the pulse self-heating circuit 101 from reversely flowing the battery electric energy to the charging circuit 107. Therefore, when the pulse self-heating circuit 101 and the charging circuit 107 are operating simultaneously, the second unidirectional conduction module 106 can block the current flowing out of the pulse self-heating circuit 101 from flowing to the charging circuit 107, thereby isolating the high-frequency pulse current generated by the pulse self-heating circuit 101 from the charging circuit 107, reducing the loss caused by the pulse current and pulsating voltage generated by the pulse self-heating circuit 101 when it is operating in the charging circuit 107, improving the heating efficiency of the pulse self-heating circuit 101, and reducing the interference of the high-frequency pulse current generated by the pulse self-heating circuit 101 on the charging circuit 107.

[0100] In some embodiments, as Figure 9 As shown, the first unidirectional conduction module 102 includes a first diode D1. The anode of the first diode D1 serves as the input terminal of the first unidirectional conduction module 102, connecting the first terminal of the pulse self-heating circuit 101 and the first terminal of the battery module 103. The cathode of the first diode D1 serves as the output terminal of the first unidirectional conduction module 102, connected to the first terminal of the load circuit 104. When the pulse self-heating circuit 101 and the load circuit 104 are operating simultaneously, the first diode D1 allows the pulse self-heating circuit 101 to reversely transfer battery power to the load circuit 104, while preventing power from the load circuit 104 from flowing to the pulse self-heating circuit 101. The second unidirectional conduction module 106 includes a second diode D2. The anode of the second diode D2 serves as the input terminal of the second unidirectional conduction module 106, connected to the first terminal of the charging circuit 107. The cathode of the second diode D2 serves as the output terminal of the second unidirectional conduction module 106, connecting the first terminal of the pulse self-heating circuit 101 and the first terminal of the battery module 103. The second diode D2 can be used to allow the power of the charging circuit 107 to flow to the pulse self-heating circuit 101 when the pulse self-heating circuit 101 and the charging circuit 107 work simultaneously, and prevent the pulse self-heating circuit 101 from reversely flowing the battery power to the charging circuit 107.

[0101] In some embodiments, as Figure 10 As shown, the electric two-wheeled vehicle also includes a first switch module 105 connected in parallel with the first one-way conduction module 102 and / or a second switch module 108 connected in parallel with the second one-way conduction module 106. The first switch module 105 is used to control whether the first one-way conduction module 102 is bypassed, and the second switch module 108 is used to control whether the second one-way conduction module 106 is bypassed.

[0102] In other embodiments, Figure 11 As shown, the electric two-wheeled vehicle includes a first unidirectional conduction module 102, a second unidirectional conduction module 106, a first switch module 105 connected in parallel with the first unidirectional conduction module 102, and a second switch module 108 connected in parallel with the second unidirectional conduction module 106. The input end of the first unidirectional conduction module 102 is connected to the first end of the pulse self-heating circuit 101 and the first terminal of the battery module 103, the output end of the second unidirectional conduction module 106 is connected to the output end of the first unidirectional conduction module 102, and the input end of the second unidirectional conduction module 106 is connected to the first end of the load circuit 104 and the first terminal of the charging circuit 107. Alternatively, the output end of the first unidirectional conduction module 102 is connected to the first end of the load circuit 104 and the first terminal of the charging circuit 107, the input end of the second unidirectional conduction module 106 is connected to the input end of the first unidirectional conduction module 102, and the output end of the second unidirectional conduction module 106 is connected to the first end of the pulse self-heating circuit 101 and the first terminal of the battery module 103. The second terminal of the battery module 103 and the second end of the pulse self-heating circuit 101 are used to connect the second end of the load circuit 104 and the second end of the charging circuit 107. The first unidirectional conduction module 102 is used to allow the pulse self-heating circuit 101 to reversely transfer battery power to the load circuit 104 and prevent the power of the load circuit 104 from flowing to the pulse self-heating circuit 101. The second unidirectional conduction module 106 allows the power of the charging circuit 107 to flow to the pulse self-heating circuit 101 and prevents the pulse self-heating circuit 101 from reversely transferring battery power to the charging circuit 107. The first switch module 105 is used to control whether the first unidirectional conduction module 102 is bypassed, and the second switch module 108 is used to control whether the second unidirectional conduction module 106 is bypassed.

[0103] For example, when the pulse self-heating circuit 101 and the load circuit 104 are working at the same time, the first switch module 105 can be disconnected and the second switch module 108 can be closed to control the second unidirectional conduction module 106 to be bypassed, and the first unidirectional conduction module 102 is not bypassed. At this time, the first unidirectional conduction module 102 prevents the current of the load circuit 104 from flowing to the pulse self-heating circuit 101, allowing the small pulse current of the pulse self-heating circuit 101 to flow to the capacitor in the load circuit, and the capacitor cannot charge the pulse self-heating circuit 101, thereby reducing the loss caused by the pulse self-heating circuit 101 on the capacitor in the load circuit 104.

[0104] For another example, when the pulse self-heating circuit 101 and the charging circuit 107 are working at the same time, the second switch module 108 can be disconnected and the first switch module 105 can be closed to control the first unidirectional conduction module 102 to be bypassed and the second unidirectional conduction module 106 not to be bypassed. At this time, the second unidirectional conduction module 106 can prevent the pulse self-heating circuit 101 from flowing the battery power to the charging circuit 107, and allow the power of the charging circuit 107 to flow to the battery module 103, thereby reducing the impact of the pulse current generated by the pulse self-heating circuit 101 when it is working on the charging circuit.

[0105] For another example, when the pulse self-heating circuit 101 is not operating, regardless of whether the load circuit 104 or the charging circuit 107 is in operation, the first switch module 105 and the second switch module 108 can be closed, so that the battery module 103 is directly connected to the load circuit 104 and the charging circuit 107, thereby reducing the loss caused by the unidirectional conduction module. Of course, when the pulse self-heating circuit 101 is not operating, if the load circuit 104 is in operation, the second switch module 108 can also be opened, and if the charging circuit 107 is in operation, the first switch module 105 can also be opened.

[0106] In some examples, when the battery module 103 is connected to the load circuit 104 and the charging circuit 107, the electric two-wheeled vehicle may include a first one-way conduction module 102 and a second one-way conduction module 106. The first one-way conduction module 102 may include a first diode D1, and the second one-way conduction module 106 may include a second diode D2. Figure 12 As shown, the anode of the first diode D1 serves as the input end of the first unidirectional conduction module 102, and the cathode of the first diode D1 serves as the output end of the first unidirectional conduction module 102; the anode of the second diode D2 serves as the input end of the second unidirectional conduction module 106, and the cathode of the second diode D2 serves as the output end of the second unidirectional conduction module 106, thereby using two diodes to block the influence between the pulse self-heating circuit 101 and the subsequent circuit, where the subsequent circuit includes the load circuit 104 and the charging circuit 107.

[0107] In other embodiments, a single diode and a polarity reversal circuit can be used to achieve the function of the two diodes in the above embodiment. For example, under normal circumstances, the diode is used to block the interaction between the pulse self-heating circuit 101 and the load circuit 104. When charging the battery module 103, the polarity reversal circuit can be used to reverse the polarity of the diode to block the interaction between the pulse self-heating circuit 101 and the charging circuit 107. The polarity reversal circuit can be implemented by controlling multiple switches.

[0108] In some embodiments, as Figure 13-16As shown, the electric two-wheeled vehicle includes a pulse self-heating control module 109, which is connected to the pulse self-heating circuit 101 and is used to control whether the pulse self-heating circuit 101 is in a working state; the pulse self-heating control module 109 is also connected to the first switch module 105 and the second switch module 108, and is used to control the on-off state of the first switch module 105 and the on-off state of the second switch module 108.

[0109] In other embodiments, the electric two-wheeled vehicle further includes a battery management system (BMS) control module 111 connected to the pulse self-heating control module 109 and a temperature detection module 110 connected to the power management system control module 111, such as Figure 19 As shown, the temperature detection module 110 is used to detect the temperature of the battery module 103 , and the battery management system control module 109 is used to control whether the pulse self-heating control module 109 is in a working state according to the temperature of the battery module 103 detected by the temperature detection module 110 .

[0110] The above is a detailed description of the electric two-wheeled vehicle provided in the embodiment of the present application. The electric two-wheeled vehicle provided in the embodiment of the present application has a first unidirectional conduction module connected between the pulse self-heating circuit and the load circuit. The first unidirectional conduction module allows the pulse self-heating circuit to reversely flow the battery power to the load circuit, preventing the power of the load circuit from flowing to the pulse self-heating circuit, thereby reducing the impact of the load circuit on the pulse self-heating circuit and reducing additional losses.

[0111] Second embodiment

[0112] Figure 17 The circuit diagram of the electric two-wheeled vehicle provided by one embodiment of the present application is shown. Figure 2 and 17 As shown, the electric two-wheeled vehicle of this embodiment is suitable for connecting to a charging circuit, including:

[0113] Battery module 203, pulse self-heating circuit 201, unidirectional conduction module 202, charging circuit 204, motor drive circuit, motor and wheel; the motor drive circuit is used to provide a drive signal to the motor, and the motor is used to drive the wheel to rotate. The battery module is used to supply power to the motor drive circuit and the motor, and the charging circuit is used to charge the battery module;

[0114] The first end of the pulse self-heating circuit 201 is connected to the first electrode of the battery module 203, and the second end of the pulse self-heating circuit 201 is connected to the second electrode of the battery module 203.

[0115] The pulse self-heating circuit 201 includes a third switch module 1011, an inductor module 1012, a fourth switch module 1013, and a capacitor module 1014. The first end of the third switch module 1011 serves as the first end of the pulse self-heating circuit 101. The second end of the third switch module 1011 is connected to the first end of the inductor module 1012. The second end of the inductor module 1012 is connected to the first end of the capacitor module 1014 and the first end of the fourth switch module 1013. The second end of the capacitor module 1014 is connected to the second end of the fourth switch module 1013, serving as the second end of the pulse self-heating circuit 201.

[0116] The third switch module 1011 is used to control whether the pulse self-heating circuit 201 is in an operating state, and the fourth switch module 1013 is used to control whether the capacitor module 1014 is bypassed. The inductor module 1012 is used to temporarily store the electrical energy from the battery module 103 when the third switch module 1011 and the fourth switch module 1013 are in an on state, and temporarily store the electrical energy from the inductor module 1012 when the fourth switch module 1013 is in an off state, and reversely flow the electrical energy from the inductor module 1012 to the inductor module 1012. The inductor module 1012 is also used to flow the electrical energy that reversely flows from the capacitor module 1014 to the inductor module 1012 back to the battery module 103 when the fourth switch module 1013 is on, so that the pulse self-heating circuit 201 is used to reversely flow the battery electrical energy flowing out of the battery module 203 to the battery module 203, thereby forming a pulse current that repeatedly enters and exits the battery module 203.

[0117] The output end of the unidirectional conduction module 202 is connected to the first end of the pulse self-heating circuit 201 and the first pole of the battery module 203, the input end of the unidirectional conduction module 202 is used to connect to the first end of the charging circuit 204, the second pole of the battery module 203 and the second end of the pulse self-heating circuit 201 are used to connect to the second end of the charging circuit 204; the unidirectional conduction module 202 is used to allow the electric energy of the charging circuit 204 to flow to the pulse self-heating circuit 201, and prevent the pulse self-heating circuit 201 from reversely flowing the battery electric energy to the charging circuit 204.

[0118] In an embodiment of the present application, a unidirectional conduction module 202 is connected between the first end of the pulse self-heating circuit 201 and the first end of the charging circuit 204. The unidirectional conduction module 202 can block the current flowing out of the pulse self-heating circuit 201, thereby isolating the high-frequency pulse current generated by the pulse self-heating circuit 201 from the charging circuit 204, preventing it from flowing into the charging circuit 204, reducing losses, improving efficiency, and at the same time reducing the interference of the high-frequency pulse current generated by the pulse self-heating circuit 201 on the charging circuit 204.

[0119] In some embodiments, as Figure 18As shown, the unidirectional conduction module 202 includes a diode D. The anode of the diode D serves as the input terminal of the unidirectional conduction module 202 and is used to connect to the first terminal of the charging circuit 204. The cathode of the diode D serves as the output terminal of the unidirectional conduction module 202 and is connected to the first terminal of the pulse self-heating circuit 201 and the first electrode of the battery module 203. The diode D has a unidirectional conduction characteristic, thereby preventing the pulse self-heating circuit 201 from transferring battery power back to the charging circuit 204.

[0120] In some embodiments, as Figure 19 As shown, the electric two-wheeled vehicle further includes a switch module 205 connected in parallel with the one-way conduction module 202. The switch module 205 is used to control whether the one-way conduction is bypassed. For example, when the pulse self-heating circuit 201 is in operation, the switch module 205 can be opened, so that the one-way conduction module 202 is not bypassed, thereby preventing the pulse self-heating circuit 201 from reversely flowing battery power to the charging circuit 204. When the pulse self-heating circuit 201 is not in operation, the switch module 205 can be closed, so that the one-way conduction module 202 is bypassed, reducing the loss caused by the one-way conduction module 202.

[0121] In some embodiments, the first pole of the battery module 203 is the positive pole, and the second pole of the battery module 203 is the negative pole. The first end of the pulse self-heating circuit 201 is connected to the positive pole of the battery module 203, and the second end of the pulse self-heating circuit 201 is connected to the negative pole of the battery module 203.

[0122] The electric two-wheeled vehicle provided in the embodiment of the present application has a unidirectional conduction module connected between the pulse self-heating circuit and the charging circuit. The unidirectional conduction module allows the electric energy of the charging circuit to flow to the pulse self-heating circuit, and prevents the pulse self-heating circuit from flowing the battery electric energy back to the charging circuit, thereby reducing the impact of the high-frequency pulse current generated by the pulse self-heating circuit on the charging circuit, while reducing the loss of the pulse self-heating circuit and improving the heating efficiency.

[0123] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that they may modify the technical solutions described in the aforementioned embodiments or replace some or all of the technical features therein with equivalents. However, such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the various embodiments of this application.

Claims

1. An electric two-wheeled vehicle, characterized in that: include: A battery module, a pulse self-heating circuit, a first unidirectional conduction module, a load circuit, a motor and wheels; The load circuit includes a motor drive circuit, the motor drive circuit is used to provide a drive signal to the motor, and the motor is used to drive the wheel to rotate; the load circuit is capacitive or resistive-capacitive; The first end of the pulse self-heating circuit is connected to the first electrode of the battery module, and the second end of the pulse self-heating circuit is connected to the second electrode of the battery module; The pulse self-heating circuit includes a third switch module, an inductor module, a fourth switch module, and a capacitor module; the first end of the third switch module serves as the first end of the pulse self-heating circuit, the second end of the third switch module is connected to the first end of the inductor module, the second end of the inductor module is connected to the first end of the capacitor module and the first end of the fourth switch module, and the second end of the capacitor module is connected to the second end of the fourth switch module to serve as the second end of the pulse self-heating circuit; The third switch module is used to control whether the pulse self-heating circuit is in an operating state, and the fourth switch module is used to control whether the capacitor module is bypassed; the inductor module is used to temporarily store the electric energy from the battery module when the third switch module and the fourth switch module are in an on state, and transfer the temporarily stored electric energy from the battery module to the capacitor module when the fourth switch module is in an off state; the capacitor module is used to temporarily store the electric energy from the inductor module when the fourth switch module is in an off state, and reversely flow the electric energy from the inductor module to the inductor module; the inductor module is further used to flow the electric energy reversely flowing from the capacitor module to the inductor module back to the battery module when the fourth switch module is on, so that the pulse self-heating circuit reversely flows the battery electric energy flowing out of the battery module to the battery module to form a pulse current that repeatedly enters and exits the battery module; The input end of the first unidirectional conduction module is connected to the first end of the pulse self-heating circuit and the first pole of the battery module, the output end of the first unidirectional conduction module is used to connect the first end of the load circuit, and the second pole of the battery module and the second end of the pulse self-heating circuit are used to connect the second end of the load circuit; the first unidirectional conduction module is used to allow the pulse self-heating circuit to reversely flow the battery power to the load circuit, and prevent the power of the load circuit from flowing to the pulse self-heating circuit; The first unidirectional conducting module includes a first diode; The anode of the first diode serves as the input end of the first unidirectional conduction module, connecting the first end of the pulse self-heating circuit and the first electrode of the battery module; The cathode of the first diode serves as the output end of the first unidirectional conduction module and is used to connect to the first end of the load circuit.

2. The electric two-wheeled vehicle according to claim 1, characterized in that: It also includes a first switch module connected in parallel with the first unidirectional conduction module; When the pulse self-heating circuit and the load circuit are working, the first switch module is disconnected to control the first unidirectional conduction module to be in a working state; When the pulse self-heating circuit stops working, the first switch module is closed to control the first unidirectional conduction module to be bypassed.

3. The electric two-wheeled vehicle according to claim 1, characterized in that: Also included is a second unidirectional conduction module and a charging circuit; The output end of the second unidirectional conduction module is connected to the first end of the pulse self-heating circuit and the first terminal of the battery module; the input end of the second unidirectional conduction module is used to connect to the first end of the charging circuit; the second terminal of the battery module and the second end of the pulse self-heating circuit are used to connect to the second end of the charging circuit; The second unidirectional conduction module is used to allow the electric energy of the charging circuit to flow to the pulse self-heating circuit and prevent the pulse self-heating circuit from reversely flowing the battery electric energy to the charging circuit.

4. The electric two-wheeled vehicle according to claim 3, characterized in that: It also includes a first switch module connected in parallel with the first unidirectional conducting module and / or a second switch module connected in parallel with the second unidirectional conducting module; When the pulse self-heating circuit and the load circuit are working, the first switch module is disconnected to control the first unidirectional conduction module to be in a working state; When the pulse self-heating circuit and the charging circuit are working, the second switch module is disconnected to control the first unidirectional conduction module to be in a working state; When the pulse self-heating circuit stops working, the first switch module and the second switch module are closed to control the first unidirectional conduction module and the second unidirectional conduction module to be bypassed.

5. The electric two-wheeled vehicle according to claim 1, characterized in that: The device further includes a charging circuit, a second unidirectional conducting module, a first switch module connected in parallel with the first unidirectional conducting module, and a second switch module connected in parallel with the second unidirectional conducting module. The output end of the second one-way conducting module is connected to the output end of the first one-way conducting module, and the input end of the second one-way conducting module is used to connect the first end of the load circuit and the first end of the charging circuit, or the input end of the second one-way conducting module is connected to the input end of the first one-way conducting module, the output end of the first one-way conducting module is used to connect the first end of the load circuit and the first end of the charging circuit, and the output end of the second one-way conducting module is connected to the first electrode of the battery module and the first end of the pulse self-heating circuit; The second terminal of the battery module and the second end of the pulse self-heating circuit are used to connect the second end of the load circuit and the second end of the charging circuit; the second unidirectional conduction module is used to allow the power of the charging circuit to flow to the pulse self-heating circuit and prevent the pulse self-heating circuit from reversely flowing the battery power to the charging circuit; When the pulse self-heating circuit and the load circuit are working, the first switch module is disconnected to control the first unidirectional conduction module to be in a working state; When the pulse self-heating circuit and the charging circuit are working, the second switch module is disconnected to control the first unidirectional conduction module to be in a working state; When the pulse self-heating circuit stops working, the first switch module and the second switch module are closed to control the first unidirectional conduction module and the second unidirectional conduction module to be bypassed.

6. The electric two-wheeled vehicle according to claim 3 or 5, characterized in that: The first unidirectional conduction module includes a first diode, and the second unidirectional conduction module includes a second diode; The anode of the first diode serves as the input end of the first unidirectional conduction module, and the cathode of the first diode serves as the output end of the first unidirectional conduction module; The anode of the second diode serves as the input end of the second unidirectional conduction module, and the cathode of the second diode serves as the output end of the second unidirectional conduction module.

7. The electric two-wheeled vehicle according to any one of claims 1 to 5, characterized in that: The third switch module includes a first MOS transistor, the fourth switch module includes a second MOS transistor, the inductor module includes an inductor element, and the capacitor module includes a capacitor element.

8. The electric two-wheeled vehicle according to claim 7, characterized in that: The first MOS transistor and the second MOS transistor are N-type MOS transistors; The gate of the first MOS transistor is used to receive a first control signal, the source of the first MOS transistor serves as the first end of the third switch module, and the drain of the first MOS transistor serves as the second end of the third switch module; The gate of the second MOS transistor is used to receive the second control signal, the source of the second MOS transistor serves as the first end of the fourth switch module, and the drain of the second MOS transistor serves as the second end of the fourth switch module; The first end of the inductor element is connected to the drain of the first MOS transistor, and the second end of the inductor element is connected to the first end of the capacitor element and the source of the second MOS transistor; The second end of the capacitor is connected to the drain of the second MOS transistor.

9. The electric two-wheeled vehicle according to any one of claims 1 to 5, characterized in that: The pulse self-heating circuit further includes: a fifth switch module and a resistance module; The first end of the resistor module is connected to the first end of the capacitor module, the second end of the resistor module is connected to the first end of the fifth switch module, and the second end of the fifth switch module is connected to the second end of the inductor module; The fifth switch module is configured to be controlled to be turned on when the third switch module and the fourth switch module are in an off state, so as to consume the residual charge in the capacitor module; and / or, The pulse self-heating circuit further includes: a freewheeling diode; an output end of the freewheeling diode is connected to the second end of the third switch module and the first end of the inductor module, and an input end of the freewheeling diode is connected to the second end of the capacitor module and the second end of the fourth switch module; The freewheeling diode is used to provide a freewheeling circuit for the inductor module when the third switch module is abnormally disconnected; and / or, The first electrode of the battery module is a positive electrode, and the second electrode of the battery module is a negative electrode.

10. The electric two-wheeled vehicle according to claim 4 or 5, characterized in that: Also included is a pulse self-heating control module; The pulse self-heating control module is connected to the pulse self-heating circuit and is used to control whether the pulse self-heating circuit is in a working state; The pulse self-heating control module is also connected to the first switch module and the second switch module, and is used to control the on and off states of the first switch module and the second switch module.

11. The electric two-wheeled vehicle according to claim 10, characterized in that: It also includes a battery management system control module connected to the pulse self-heating control module, and a temperature detection module connected to the battery management system control module, the temperature detection module is used to detect the temperature of the battery module; The battery management system control module is used to control whether the pulse self-heating control module is in a working state according to the temperature of the battery module detected by the temperature detection module.

12. An electric two-wheeled vehicle, characterized in that: include: Battery module, pulse self-heating circuit, unidirectional conduction module, charging circuit, motor drive circuit, motor and wheels; The motor drive circuit is used to provide a drive signal to the motor, and the motor is used to drive the wheel to rotate. The battery module is used to supply power to the motor drive circuit and the motor; The charging circuit is used to charge the battery module; The first end of the pulse self-heating circuit is connected to the first electrode of the battery module, and the second end of the pulse self-heating circuit is connected to the second electrode of the battery module; The pulse self-heating circuit includes a third switch module, an inductor module, a fourth switch module, and a capacitor module; the first end of the third switch module serves as the first end of the pulse self-heating circuit, the second end of the third switch module is connected to the first end of the inductor module, the second end of the inductor module is connected to the first end of the capacitor module and the first end of the fourth switch module, and the second end of the capacitor module is connected to the second end of the fourth switch module to serve as the second end of the pulse self-heating circuit; The third switch module is used to control whether the pulse self-heating circuit is in an operating state, and the fourth switch module is used to control whether the capacitor module is bypassed; the inductor module is used to temporarily store the electric energy from the battery module when the third switch module and the fourth switch module are in an on state, and transfer the temporarily stored electric energy from the battery module to the capacitor module when the fourth switch module is in an off state; the capacitor module is used to temporarily store the electric energy from the inductor module when the fourth switch module is in an off state, and reversely flow the electric energy from the inductor module to the inductor module; the inductor module is further used to flow the electric energy reversely flowing from the capacitor module to the inductor module back to the battery module when the fourth switch module is on, so that the pulse self-heating circuit reversely flows the battery electric energy flowing out of the battery module to the battery module to form a pulse current that repeatedly enters and exits the battery module; The output end of the unidirectional conduction module is connected to the first end of the pulse self-heating circuit and the first terminal of the battery module, the input end of the unidirectional conduction module is used to connect the first end of the charging circuit, and the second terminal of the battery module and the second end of the pulse self-heating circuit are used to connect the second end of the charging circuit; the unidirectional conduction module is used to allow the electric energy of the charging circuit to flow to the pulse self-heating circuit, and prevent the pulse self-heating circuit from reversely flowing the battery electric energy to the charging circuit; The one-way conducting module includes a diode; The anode of the diode serves as the input end of the unidirectional conduction module and is used to connect to the first end of the charging circuit; The cathode of the diode serves as the output end of the unidirectional conduction module and is connected to the first end of the pulse self-heating circuit and the first electrode of the battery module.

13. The electric two-wheeled vehicle according to claim 12, characterized in that: The electric two-wheeled vehicle further comprises a switch module connected in parallel with the one-way conducting module, the switch module being used to control whether the one-way conducting module is bypassed; and / or, The first electrode of the battery module is a positive electrode, and the second electrode of the battery module is a negative electrode.

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