Heating control circuit and electric two-wheeled vehicle

Abstract

The utility model provides a heating control circuit and an electric two-wheeled vehicle. The heating control circuit comprises a pulse self-heating circuit and a first one-way conduction module. The first end of the pulse self-heating circuit is connected with the first pole of the battery module, the second end of the pulse self-heating circuit is connected with the second pole of the battery module, and the pulse self-heating circuit is used for enabling battery electric energy flowing out of the battery module to reversely flow to the battery module to form pulse current repeatedly entering and exiting the battery module; the input end of the first one-way conduction module is connected with the first end of the pulse self-heating circuit and the first pole of the battery module, and the output end of the first one-way conduction module is used for being connected with the first end of the load circuit; and the first one-way conduction module is used for allowing the pulse self-heating circuit to reversely flow battery electric energy to the capacitive load current and preventing the electric energy of the capacitive load current from flowing to the pulse self-heating circuit, so that the influence of the load circuit on the pulse self-heating circuit is reduced, the loss of the pulse self-heating circuit is reduced, and the heating efficiency of the pulse self-heating circuit is improved.

Description

Technical Field

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

[0002] In low temperature environment, the performance of the battery will decline, such as the charging ability, discharging ability and battery capacity will decline. As a result, the battery pulse self-heating technology is generated, which 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 reverses the electric energy of the battery to flow 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. Utility Model Content

[0005] The present application provides a heating control circuit and an electric two-wheeled vehicle, which reduce the influence 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 a heating control circuit, comprising:

[0007] A pulse self-heating circuit and a first unidirectional conduction module;

[0008] 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 is used to reverse the battery power flowing out of the battery module to the battery module to form a pulse current that repeatedly enters and exits the battery module;

[0009] 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, 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, and the load circuit is capacitive or resistive-capacitive.

[0010] Optionally, the first unidirectional conduction module includes a first diode;

[0011] 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;

[0012] 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.

[0013] Optionally, a first switch module connected in parallel with the first unidirectional conduction module is further included, and the first switch module is used to control whether the first unidirectional conduction module is bypassed.

[0014] Optionally, it also includes a second unidirectional conduction module;

[0015] The output end of the second 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 second unidirectional conduction module is used to connect the first end of the charging circuit; 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;

[0016] 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 to prevent the pulse self-heating circuit from reversely flowing the battery electric energy to the charging circuit.

[0017] Optionally, it further includes a first switch module connected in parallel with the first unidirectional conduction module and / or a second switch module connected in parallel with the second unidirectional conduction module;

[0018] The first switch module is used to control whether the first unidirectional conduction module is bypassed, and the second switch module is used to control whether the second unidirectional conduction module is bypassed.

[0019] Optionally, it further includes 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;

[0020] The output end of the second one-way conduction module is connected to the output end of the first one-way conduction module, and the input end of the second one-way conduction 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 conduction module is connected to the input end of the first one-way conduction module, the output end of the first one-way conduction 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 conduction module is connected to the first pole of the battery module and the first end of the pulse self-heating circuit;

[0021] 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 and 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;

[0022] The first switch module is used to control whether the first unidirectional conduction module is bypassed, and the second switch module is used to control whether the second unidirectional conduction module is bypassed.

[0023] Optionally, the first unidirectional conduction module includes a first diode, and the second unidirectional conduction module includes a second diode;

[0024] 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;

[0025] 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.

[0026] Optionally, the pulse self-heating circuit includes:

[0027] A third switch module, an inductor module, a fourth switch module and a capacitor module;

[0028] The first end of the third switch module serves as the first end of the pulse self-heating circuit, and the second end of the third switch module is connected to the first end of the inductor module;

[0029] 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, serving as the second end of the pulse self-heating circuit;

[0030] 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;

[0031] 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;

[0032] The capacitor module is used for temporarily storing the electric energy from the inductor module when the fourth switch module is in an off state, and for reversely flowing the electric energy from the inductor module to the inductor module;

[0033] The inductor module is further configured to allow the electric energy that flows reversely from the capacitor module to the inductor module to flow back to the battery module when the fourth switch module is turned on.

[0034] Optionally, the third switch module includes a first MOS tube, the fourth switch module includes a second MOS tube, 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 a first end of the third switch module, and the drain of the first MOS transistor serves as a 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 used for being controlled to be turned on when the third switch module and the fourth switch module are in the disconnected 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; the 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 the 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] and / or,

[0046] The first electrode of the battery module is a positive electrode, and the second electrode of the battery module is a negative electrode.

[0047] In a second aspect, the present application provides a heating control circuit, which is suitable for connecting to a charging circuit, including:

[0048] Pulse self-heating circuit and unidirectional conduction module;

[0049] 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 is used to reverse the battery power flowing out of the battery module to the battery module to form a pulse current that repeatedly enters and exits the battery module;

[0050] 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, 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, and 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.

[0051] 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 influence 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.

[0052] Optionally, the unidirectional conduction module includes a diode;

[0053] 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;

[0054] 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.

[0055] Optionally, the heating control circuit further includes a switch module connected in parallel with the one-way conducting module, and the switch module is used to control whether the one-way conducting module is bypassed;

[0056] and / or,

[0057] The first electrode of the battery module is a positive electrode, and the second electrode of the battery module is a negative electrode.

[0058] In a third aspect, the present application provides an electric two-wheeled vehicle, comprising a heating control circuit, a load circuit and a battery module as described in any one of the first aspects; wherein the load circuit comprises a motor drive circuit of the electric two-wheeled vehicle, the battery module is used to power the load circuit, and the heating control circuit is used to realize self-heating of the battery module.

[0059] Optionally, it further includes a charging circuit and a second unidirectional conduction module; the charging circuit is used to charge the battery module;

[0060] The output end of the second 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 second unidirectional conduction module is connected to the first end of the charging circuit; the second end of the charging circuit is connected to the second pole of the battery module and the second end of the pulse self-heating circuit;

[0061] 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.

[0062] Optionally, it further includes a first switch module connected in parallel with the first unidirectional conduction module and a second switch module connected in parallel with the second unidirectional conduction module;

[0063] The first switch module is used to control whether the first unidirectional conduction module is bypassed, and the second switch module is used to control whether the second unidirectional conduction module is bypassed.

[0064] Optionally, it further includes a charging circuit, a second unidirectional conduction module, a first switch module connected in parallel with the first unidirectional conduction module, and a second switch module connected in parallel with the second unidirectional conduction module;

[0065] The output end of the second unidirectional conduction module is connected to the output end of the first unidirectional conduction module, and the input end of the second unidirectional conduction module is connected to the first end of the load circuit and the first end of the charging circuit; the second end of the load circuit and the second end of the charging circuit are connected to the second pole of the battery module and the second end of the pulse self-heating circuit;

[0066] 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;

[0067] The first switch module is used to control whether the first unidirectional conduction module is bypassed, and the second switch module is used to control whether the second unidirectional conduction module is bypassed.

[0068] Optionally, a pulse self-heating control module is also included;

[0069] 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;

[0070] 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.

[0071] 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;

[0072] 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.

[0073] In a fourth aspect, the present application provides an electric two-wheeled vehicle, comprising a heating control circuit, a charging circuit and a battery module as described in any one of the second aspects, wherein the charging circuit is used to charge the battery module, and the heating control circuit is used to achieve self-heating of the battery module.

[0074] The heating control circuit provided by the present application includes a pulse self-heating circuit and a first unidirectional conduction module; the first end of the pulse self-heating circuit is connected to the first pole of the battery module, the second end of the pulse self-heating circuit is connected to the second pole of the battery module, and the pulse self-heating circuit is used to reverse the battery power 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 power to the capacitive load current, and prevent the power of the capacitive load current from flowing to the pulse self-heating circuit. The scheme of the present application, by arranging a unidirectional conduction module between the pulse self-heating circuit and the load circuit, prevents the power of the load circuit from flowing to the pulse self-heating circuit, reduces the influence of the load circuit on the pulse self-heating circuit, reduces the loss of the pulse self-heating circuit, and improves the heating efficiency of the pulse self-heating circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] 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 paying any creative work.

[0076] Figure 1-Figure 15 A circuit diagram of a heating control circuit provided in an embodiment of the present application;

[0077] Figure 16-Figure 19 A circuit diagram of an electric two-wheeled vehicle provided in accordance with an embodiment of the present application. DETAILED DESCRIPTION

[0078] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0079] 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.

[0080] To this end, the present application provides a heating control circuit, 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.

[0081] The technical solution of the present application is described in detail with specific embodiments below. 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.

[0082] First embodiment

[0083] Figure 1 FIG. 1 shows a circuit diagram of a heating control circuit provided by an embodiment of the present application. Figure 1 As shown, the heating control circuit of this embodiment includes:

[0084] A pulse self-heating circuit 101 and a first unidirectional conduction module 102;

[0085] 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. 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 enters and exits the battery module 103;

[0086] 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, and the load circuit 104 is capacitive or resistive-capacitive.

[0087] 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, which can be the same or similar. The load circuit 104 can be a motor controller in an electric vehicle, and the motor controller often contains a capacitor or is capacitive or resistive-capacitive.

[0088] In a low temperature environment, the battery performance in the battery module 103 will decrease. Therefore, a pulse self-heating circuit 101 is connected at 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 enters and exits 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. In addition, the internal resistance of the battery module 103 heats the battery module 103. 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.

[0089] However, when the load circuit 104 and the pulse self-heating circuit 101 work simultaneously, the capacitor in the load circuit 104 will affect the control and operation of the pulse self-heating circuit 101 , and affect the heating effect and heating efficiency of the pulse self-heating circuit 101 .

[0090] 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 flow the battery power to the load circuit 104, and prevents the power of the load circuit 104 from flowing to the pulse self-heating circuit 101. And because the first unidirectional conduction module 102 prevents the power of the capacitive load current from flowing to the pulse self-heating circuit 101, the loss of the load circuit 104 is reduced, and the energy loss in the equivalent capacitance of the load circuit 104 is prevented.

[0091] 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 working normally, the internal resistance of the load is larger, 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 influence 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.

[0092] 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 , so as to reduce the loss of the load circuit 104 .

[0093] 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 inductance and the capacitance in the isolated load circuit 104. Only the matching filtering constant can play an isolation role. 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.

[0094] 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.

[0095] In some embodiments, Figure 2 As shown, 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, and 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, and 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. The third switch module 1011 is used to control whether the pulse self-heating circuit 101 is in working 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 electric energy from the battery module 103 when the third switch module 1011 and the fourth switch module 1013 are in the conducting state, and transfer the temporarily stored electric energy from the battery module 103 to the capacitor module 1014 when the fourth switch module 1013 is in the disconnected state; the capacitor module 1014 is used to When the fourth switch module 1013 is in the off state, the electric energy from the inductor module 1012 is temporarily stored, and the electric energy from the inductor module 1012 flows back to the inductor module 1012; the inductor module 1012 is also used to reversely flow the electric energy from the capacitor module 1014 to the inductor module 1012 back to the battery module 103 when the fourth switch module 1013 is turned on, so that the electric energy flowing out of the battery module 103 flows back to the battery module 103 to form a pulse current that repeatedly enters and exits the battery module 103.

[0096] For example, Figure 3 As shown, the third switch module 1011 includes a first MOS transistor Q1, the fourth switch module 1013 includes a second MOS transistor Q2, the inductor module 1012 includes an inductor element L1, and the capacitor module 1014 includes a capacitor element C1. The gate of the first MOS transistor Q1 receives the first control signal A, the first end of the first MOS transistor Q1 serves as the first end of the third switch module 1011, the second end of the first MOS transistor Q1 is connected to the first end of the inductor element L1, the second end of the inductor element L1 is connected to the first end of the capacitor element C1 and the first end of the second MOS transistor Q2, the second end of the capacitor element C1 is connected to the second end of the second MOS transistor Q2, and the gate of the second MOS transistor Q2 receives the second control signal B. In practical applications, the MOS transistor control used in the pulse self-heating circuit 101 is more suitable for self-heating of small-capacity batteries such as electric two-wheeled vehicles.

[0097] The first MOS transistor Q1 controls whether the entire pulse self-heating circuit 101 is in a working state, and the second MOS transistor Q2 controls the transfer of energy between the inductor element L1 and the capacitor element C1. Specifically, in the first stage, the first MOS transistor Q1 and the second MOS transistor Q2 are closed at the same time, and the battery module 103 charges the inductor element L1; after the inductor element L1 reaches the controlled peak current, the second MOS transistor Q2 is turned off, and at this time, the energy of the inductor element L1 is transferred to the capacitor element C1, and the energy of the inductor element L1 is continuously transferred to the capacitor element C1, and the voltage across the capacitor element C1 is continuously increased. When the current of the inductor element L1 gradually approaches 0, the voltage of the capacitor element C1 reaches a maximum; in the second stage, the energy of the capacitor element C1 flows in the reverse direction to the inductor element L1, and the current of the inductor element L1 continuously increases. When it increases to the reverse maximum, the voltage of the capacitor element C1 drops to the lowest point and approaches 0; in the third stage, when the voltage of the capacitor element C1 drops to the lowest point, the second MOS transistor Q2 is closed, and the energy of the inductor element L1 flows to the battery module 103, and the reverse maximum current of the inductor element L1 gradually approaches 0. When the current of the inductor L1 gradually increases from approaching 0, the battery module 103 charges the inductor L1, and the battery module 103 is repeatedly charged and discharged in this way. The reciprocating frequency can be determined according to the filtering time constants of the inductor L1 and the capacitor C1.

[0098] 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 is used as the first end of the third switch module 1011, and the drain of the first MOS transistor Q1 is used 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 is used as the first end of the fourth switch module 1013, and the drain of the second MOS transistor Q2 is used 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; 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.

[0099] In some examples, such as Figure 4As shown, the pulse self-heating circuit 101 may further include a fifth switch module and a resistor module, wherein 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 used to be controlled to be turned on when the third switch module 1011 and the fourth switch module 1013 are in the disconnected 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 will hinder the start of the 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, and then during the resonance process, the third switch module 1011 remains in the disconnected state, which will not affect the resonance.

[0100] Specifically, the fifth switch module may include a third MOS tube Q3, the gate of the third MOS tube Q3 receives the third control signal C, the first end of the third MOS tube Q3 serves as the first end of the fifth switch module, and the second end of the third MOS tube Q3 serves as the second end of the fifth switch module. The resistor module may include a resistor element R. The third MOS tube Q3 may be an NMOS tube, the first electrode of the third MOS tube Q3 serves as a source electrode, and the second electrode of the third MOS tube Q3 serves as a drain electrode.

[0101] In some examples, such as Figure 5 As 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 loop for the inductor module 1012 when the third switch module 1011 is abnormally disconnected, to prevent current mutation, and to protect other components in the pulse self-heating circuit 101 from being affected by overvoltage.

[0102] In some embodiments, Figure 6As shown, the first unidirectional conduction module 102 includes a first diode D1, the anode of the first diode D1 is used as the input end of the first unidirectional conduction module 102, and is connected to the first end of the pulse self-heating circuit 101 and the first pole of the battery module 103; the cathode of the first diode D1 is used as the output end of the first unidirectional conduction module 102, and is used to connect the first end of the load circuit 104. The first diode D1 can allow the pulse self-heating circuit 101 to reversely flow the battery power to the load circuit 104 when the pulse self-heating circuit 101 and the load circuit 104 are working at the same time, and prevent the power of the load circuit 104 from flowing to the pulse self-heating circuit 101. The first unidirectional conduction module 102 can also be implemented by other circuit modules or devices that can play a unidirectional conduction role.

[0103] In some embodiments, Figure 7 As shown, the heating control circuit also includes a first switch module 105 connected in parallel with the first unidirectional conduction module 102, and 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, and when the first switch module 105 is disconnected, the first unidirectional conduction module 102 is not bypassed and is in a working state. For example, when the pulse self-heating circuit 101 is not working, 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, reducing the loss caused by the first unidirectional conduction module 102.

[0104] In other embodiments, the first unidirectional conduction module 102 and the first switch module 105 may include a MOS tube, and the MOS tube replaces the circuit in which the first unidirectional conduction module 102 and the first switch module 105 are connected in parallel. The MOS tube here may be an NMOS tube or a PMOS tube. When the MOS tube here is an NMOS tube, the source of the NMOS tube is connected to the positive electrode of the battery module 103, the drain of the NMOS tube is connected to the load circuit 104, and the gate of the NMOS tube is the switch control terminal; when the MOS tube here is a PMOS tube, the drain of the PMOS tube is connected to the positive electrode of the battery module 103, the source of the PMOS tube is connected to the load circuit 104, and the gate of the PMOS tube 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 a thyristor, an IGBT (Insulate-Gate Bipolar Transistor, insulated gate bipolar transistor), etc.

[0105] In practical applications, the battery module 103 can also be connected to the charging circuit 107. For example, the second pole 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, which is determined according to actual conditions. The output port of the charging circuit 107 is usually capacitive or resistive-capacitive. When the pulse self-heating circuit 101 is working, the battery power of the pulse self-heating circuit 101 flows back to the charging circuit 107, and 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.

[0106] In some embodiments, Figure 8 As shown, the heating control circuit also includes a second unidirectional conduction module 106, the output end of the second unidirectional module is connected to the first end of the pulse self-heating circuit 101 and the first pole 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, and 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 working at the same time, 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 of the pulse current and the pulsating voltage generated when the pulse self-heating circuit 101 is working 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.

[0107] In some embodiments, Fig. 9As shown, the first unidirectional conduction module 102 includes a first diode D1, the anode of the first diode D1 is used as the input end of the first unidirectional conduction module 102, and is connected to the first end of the pulse self-heating circuit 101 and the first pole of the battery module 103; the cathode of the first diode D1 is used as the output end of the first unidirectional conduction module 102, and is used to connect the first end of the load circuit 104. The first diode D1 can allow the pulse self-heating circuit 101 to reversely flow the battery power to the load circuit 104 when the pulse self-heating circuit 101 and the load circuit 104 are working at the same time, and prevent the power of 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 is used as the input end of the second unidirectional conduction module 106, and is connected to the first end of the charging circuit 107; the cathode of the second diode D2 is used as the output end of the second unidirectional conduction module 106, and is connected to the first end of the pulse self-heating circuit 101 and the first pole 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 and prevent the pulse self-heating circuit 101 from reversely flowing the battery power to the charging circuit 107 when the pulse self-heating circuit 101 and the charging circuit 107 are working simultaneously.

[0108] In some embodiments, Fig.10 As shown, the heating control circuit also includes a first switch module 105 connected in parallel with the first unidirectional conduction module 102 and / or a second switch module 108 connected in parallel with the second unidirectional conduction module 106. 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.

[0109] In other embodiments, Fig.11As shown, the heating control circuit 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 pole 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 end 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 end 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 pole of the battery module 103. 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 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 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; 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 flowing the 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.

[0110] 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, and allows 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 of the pulse self-heating circuit 101 on the capacitor in the load circuit 104.

[0111] 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 is not bypassed. At this time, the second unidirectional conduction module 106 can prevent the pulse self-heating circuit 101 from transferring 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 influence of the pulse current generated by the pulse self-heating circuit 101 when it is working on the charging circuit.

[0112] For another example, when the pulse self-heating circuit 101 is not working, whether the load circuit 104 is in working state or the charging circuit 107 is in working state, 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, reducing the loss caused by the one-way conduction module. Of course, when the pulse self-heating circuit 101 is not working, if the load circuit 104 is in working state, the second switch module 108 can also be disconnected, and if the charging circuit 107 is in working state, the first switch module 105 can also be disconnected.

[0113] In some examples, when the battery module 103 is connected to the load circuit 104 and the charging circuit 107, the heating control circuit may include a first unidirectional conduction module 102 and a second unidirectional conduction module 106, the first unidirectional conduction module 102 may include a first diode D1, and the second unidirectional conduction module 106 may include a second diode D2. Fig.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, so that the two diodes are used to block the influence between the pulse self-heating circuit 101 and the subsequent circuit, and the subsequent circuit here includes the load circuit 104 and the charging circuit 107.

[0114] In other embodiments, a diode and a polarity reversal circuit may be used to achieve the functions of the two diodes in the above embodiment. For example, under normal circumstances, the diode is used to block the mutual influence between the pulse self-heating circuit 101 and the load circuit 104. When the battery module 103 needs to be charged, the polarity reversal circuit may be used to swap the two poles of the diode to block the mutual influence between the pulse self-heating circuit 101 and the charging circuit 107. The polarity reversal circuit may be implemented by controlling multiple switches.

[0115] The above describes in detail the heating control circuit provided in the embodiment of the present application. The heating control circuit provided in the embodiment of the present application connects a first unidirectional conduction module 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 influence of the load circuit on the pulse self-heating circuit and reducing additional losses.

[0116] Second embodiment

[0117] Fig.13 FIG. 1 shows a circuit diagram of a heating control circuit provided by an embodiment of the present application. Fig.13 As shown, the heating control circuit of this embodiment is suitable for connecting to a charging circuit, and includes:

[0118] Pulse self-heating circuit 201 and unidirectional conduction module 202;

[0119] The first end of the pulse self-heating circuit 201 is connected to the first pole of the battery module 203, and the second end of the pulse self-heating circuit 201 is connected to the second pole of the battery module 203. The pulse self-heating circuit 201 is used to reverse the battery power flowing out of the battery module 203 to the battery module 203 to form a pulse current that repeatedly enters and exits the battery module 203;

[0120] 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 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 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.

[0121] 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.

[0122] In some embodiments, Fig.14As shown, the unidirectional conduction module 202 includes a diode D, the anode of the diode D is used as the input end of the unidirectional conduction module 202, and is used to connect the first end of the charging circuit 204; the cathode of the diode D is used as the output end of the unidirectional conduction module 202, and is connected to the first end of the pulse self-heating circuit 201 and the first pole of the battery module 203. The diode D has a unidirectional conduction characteristic, so that it can prevent the pulse self-heating circuit 201 from reversely flowing the battery power to the charging circuit 204.

[0123] In some embodiments, the heating control circuit further includes a switch module 205 connected in parallel with the one-way conduction module 202, and 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 disconnected so that the one-way conduction module 202 is not bypassed, and the pulse self-heating circuit 201 can be prevented from reversely flowing the battery power to the charging circuit 204; when the pulse self-heating circuit 201 is not working, 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.

[0124] 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.

[0125] The heating control circuit provided in the embodiment of the present application connects a unidirectional conduction module 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 in reverse to the charging circuit, thereby reducing the influence 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.

[0126] Third embodiment

[0127] An embodiment of the present application provides an electric two-wheeled vehicle, comprising the heating control circuit, load circuit and battery module of the first embodiment; wherein the load circuit comprises a motor drive circuit of the electric two-wheeled vehicle, the battery module is used to power the load circuit, and the heating control circuit is used to realize self-heating of the battery module.

[0128] For example, the electric two-wheeled vehicle may include an electric bicycle, an electric motorcycle, an electric scooter, and the like.

[0129] In some embodiments, the electric two-wheeled vehicle also includes a charging circuit and a second unidirectional conduction module; the charging circuit is used to charge the battery module, and the output end of the second 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 second unidirectional conduction module is connected to the first end of the charging circuit, and the second end of the charging circuit is connected to the second pole of the battery module and the second end of the pulse self-heating 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.

[0130] In some embodiments, the electric two-wheeled vehicle also includes a first switch module connected in parallel with the first unidirectional conduction module and a second switch module connected in parallel with the second unidirectional conduction module; the first switch module is used to control whether the first unidirectional conduction module is bypassed, and the second switch module is used to control whether the second unidirectional conduction module is bypassed.

[0131] In some embodiments, the electric two-wheeled vehicle also includes a charging circuit, a second unidirectional conduction module, a first switch module connected in parallel with the first unidirectional conduction module, and a second switch module connected in parallel with the second unidirectional conduction module; the output end of the second unidirectional conduction module is connected to the output end of the first unidirectional conduction module, and the input end of the second unidirectional conduction module is connected to the first end of the load circuit and the first end of the charging circuit; the second end of the load circuit and the second end of the charging circuit are connected to the second pole of the battery module and the second end of the pulse self-heating 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; the first switch module is used to control whether the first unidirectional conduction module is bypassed, and the second switch module is used to control whether the second unidirectional conduction module is bypassed.

[0132] In some embodiments, Figure 16-18 As 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.

[0133] 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. Fig.19As 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 .

[0134] Fourth embodiment

[0135] An embodiment of the present application provides an electric two-wheeled vehicle, comprising the heating control circuit, charging circuit and battery module in the second embodiment, wherein the charging circuit is used to charge the battery module, and the heating control circuit is used to achieve self-heating of the battery module.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heating control circuit, characterized in that: include: A pulse self-heating circuit and a first unidirectional conduction module; 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 is used to reverse the battery power 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, 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, and the load circuit is capacitive or resistive-capacitive.

2. The heating control circuit according to claim 1, characterized in that: The first unidirectional conduction 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.

3. The heating control circuit according to claim 1, characterized in that: It also includes a first switch module connected in parallel with the first unidirectional conducting module, and the first switch module is used to control whether the first unidirectional conducting module is bypassed.

4. The heating control circuit according to claim 1, characterized in that: Also includes a second unidirectional conduction module; The output end of the second 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 second unidirectional conduction module is used to connect the first end of the charging circuit; 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 second unidirectional conduction module is used to allow the electric energy of the charging circuit to flow to the pulse self-heating circuit, and to prevent the pulse self-heating circuit from reversely flowing the battery electric energy to the charging circuit.

5. The heating control circuit according to claim 4, characterized in that: It also includes a first switch module connected in parallel with the first unidirectional conductive module and / or a second switch module connected in parallel with the second unidirectional conductive module; The first switch module is used to control whether the first unidirectional conduction module is bypassed, and the second switch module is used to control whether the second unidirectional conduction module is bypassed.

6. The heating control circuit according to claim 1, characterized in that: It also includes 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 conduction module is connected to the output end of the first one-way conduction module, and the input end of the second one-way conduction 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 conduction module is connected to the input end of the first one-way conduction module, the output end of the first one-way conduction 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 conduction module is connected to the first pole of the battery module and the first end of the pulse self-heating circuit; 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 and 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; The first switch module is used to control whether the first unidirectional conduction module is bypassed, and the second switch module is used to control whether the second unidirectional conduction module is bypassed.

7. The heating control circuit according to claim 4 or 6, 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.

8. The heating control circuit according to any one of claims 1 to 6, characterized in that: The pulse self-heating circuit comprises: 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, and 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, serving 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 for temporarily storing the electric energy from the inductor module when the fourth switch module is in an off state, and for reversely flowing the electric energy from the inductor module to the inductor module; The inductor module is further configured to allow the electric energy that flows reversely from the capacitor module to the inductor module to flow back to the battery module when the fourth switch module is turned on.

9. The heating control circuit according to claim 8, 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.

10. The heating control circuit according to claim 9, characterized in that: The first MOS tube and the second MOS tube are N-type MOS tubes; The gate of the first MOS transistor is used to receive a first control signal, the source of the first MOS transistor serves as a first end of the third switch module, and the drain of the first MOS transistor serves as a 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.

11. The heating control circuit according to claim 8, 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 used for being controlled to be turned on when the third switch module and the fourth switch module are in the disconnected state, so as to consume the residual charge in the capacitor module; and / or, The pulse self-heating circuit further includes: a freewheeling diode; the 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 the 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; 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.

12. A heating control circuit, characterized in that: Suitable for connecting charging circuits, including: Pulse self-heating circuit and unidirectional conduction module; 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 is used to reverse the battery power 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 pole of the battery module, the input end of the unidirectional conduction module is used to connect the first end of the charging circuit, 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, and 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.

13. The heating control circuit according to claim 12, characterized in that: The unidirectional 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.

14. The heating control circuit according to claim 12, characterized in that: The heating control circuit further comprises a switch module connected in parallel with the one-way conducting module, and the switch module is 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.

15. An electric two-wheeled vehicle, characterized in that: It comprises the heating control circuit, load circuit and battery module as described in any one of claims 1 to 10; wherein the load circuit comprises the motor drive circuit of the electric two-wheeled vehicle, the battery module is used to power the load circuit, and the heating control circuit is used to realize self-heating of the battery module.

16. The electric two-wheeled vehicle according to claim 15, characterized in that: It also includes a charging circuit and a second unidirectional conduction module; the charging circuit is used to charge the battery module; The output end of the second 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 second unidirectional conduction module is connected to the first end of the charging circuit; the second end of the charging circuit is connected to the second pole of the battery module and the second end of the pulse self-heating 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.

17. The electric two-wheeled vehicle according to claim 16, characterized in that: It also includes a first switch module connected in parallel with the first unidirectional conduction module and a second switch module connected in parallel with the second unidirectional conduction module; The first switch module is used to control whether the first unidirectional conduction module is bypassed, and the second switch module is used to control whether the second unidirectional conduction module is bypassed.

18. The electric two-wheeled vehicle according to claim 15, characterized in that: It also includes a charging circuit, a second unidirectional conduction module, a first switch module connected in parallel with the first unidirectional conduction module, and a second switch module connected in parallel with the second unidirectional conduction module; The output end of the second unidirectional conduction module is connected to the output end of the first unidirectional conduction module, and the input end of the second unidirectional conduction module is connected to the first end of the load circuit and the first end of the charging circuit; the second end of the load circuit and the second end of the charging circuit are connected to the second pole of the battery module and the second end of the pulse self-heating 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; The first switch module is used to control whether the first unidirectional conduction module is bypassed, and the second switch module is used to control whether the second unidirectional conduction module is bypassed.

19. The electric two-wheeled vehicle according to claim 17 or 18, 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.

20. The electric two-wheeled vehicle according to claim 19, 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, wherein 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.

21. An electric two-wheeled vehicle, characterized in that: It comprises the heating control circuit, charging circuit and battery module as described in any one of claims 12 to 14, wherein the charging circuit is used to charge the battery module, and the heating control circuit is used to realize self-heating of the battery module.

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