Short-circuit protection circuit, controller and electric two-wheeled vehicle

Abstract

The utility model discloses a short-circuit protection circuit, a controller and an electric two-wheeled vehicle. The short-circuit protection circuit comprises an amplifier module, an impedance matching module, a current adjusting module and a voltage stabilizing module, wherein a first input end of the amplifier module is connected with a power supply; the amplifier module is used for isolating a power supply from a load; the impedance matching module is connected with the output end of the amplifier module; the current adjusting module is connected between the impedance matching module and the load; the current adjusting module is used for limiting the current direction; the first end of the voltage stabilizing module is connected with a load; the second end of the voltage stabilizing module is connected with the output end of the amplifier module; the third end of the voltage stabilizing module is connected with the second input end of the amplifier module; the voltage stabilizing module is used for stabilizing the output voltage of the amplifier module. According to the embodiment of the utility model, the power supply and the load are isolated through the amplifier module, thereby reducing the influence of load fault on the power supply and avoiding fault expansion.

Description

Technical Field

[0001] The utility model relates to the technical field of electric two-wheeled vehicles, in particular to a short-circuit protection circuit, a controller and an electric two-wheeled vehicle. Background Art

[0002] With the acceleration of urbanization and the improvement of people's awareness of environmental protection, two-wheeled electric vehicles can effectively solve the needs of short-distance traffic congestion and energy conservation and emission reduction, and thus are widely used. With the development of science and technology and the further improvement of people's living standards, price is no longer the focus of the market, and users are more willing to pay for the better riding experience brought by intelligence. Intelligence has become an inevitable trend in the development of the two-wheeled electric vehicle industry. As one of the important components in the intelligent system, the side support Hall switch can not only realize the role of the side support, but also realize automatic release / entry of P gear and automatic power on / off, bringing unlimited convenience and fun to users.

[0003] However, the side support Hall switch is prone to failure after water ingress or aging, which affects the power supply of the electric two-wheeled vehicle, making the electric two-wheeled vehicle unable to ride and the failure expanding. Therefore, it is urgent to protect the power supply of the electric two-wheeled vehicle against the failure of the side support Hall switch. Utility Model Content

[0004] The utility model provides a short-circuit protection circuit, a controller and an electric two-wheeled vehicle, so as to reduce the influence of load failure on power supply and avoid the expansion of failure.

[0005] According to one aspect of the present invention, a short circuit protection circuit is provided, the circuit comprising:

[0006] An amplifier module, wherein a first input terminal of the amplifier module is connected to a power supply; the amplifier module is used to isolate the power supply from a load;

[0007] An impedance matching module, wherein the impedance matching module is connected to an output end of the amplifier module;

[0008] A current regulating module, the current regulating module is connected between the impedance matching module and the load; the current regulating module is used to limit the current direction;

[0009] A voltage stabilizing module, wherein a first end of the voltage stabilizing module is connected to the load; a second end of the voltage stabilizing module is connected to the output end of the amplifier module; a third end of the voltage stabilizing module is connected to the second input end of the amplifier module; and the voltage stabilizing module is used to stabilize the output voltage of the amplifier module.

[0010] Optionally, the voltage stabilizing module includes: a first resistor and a first capacitor;

[0011] The first end of the first resistor is connected to the load; the second end of the first resistor is connected to the second input end of the amplifier module; the first end of the first capacitor is connected to the second end of the first resistor; and the first end of the first capacitor is connected to the output end of the amplifier module.

[0012] Optionally, the amplifier module comprises: an amplifier and a second capacitor;

[0013] The first input end of the amplifier is connected to the power supply; the second input end of the amplifier is connected to the voltage stabilizing module; the output end of the amplifier is connected to the impedance matching module; the power supply end of the amplifier is connected to the power supply; the ground end of the amplifier is grounded; the first end of the second capacitor is connected to the power supply; and the second end of the second capacitor is grounded.

[0014] Optionally, the amplifier module further includes: a third capacitor;

[0015] The third capacitor is connected between the power supply terminal of the amplifier and the ground terminal of the amplifier.

[0016] Optionally, the amplifier module further includes: a fourth capacitor;

[0017] The first end of the fourth capacitor is connected to the second end of the second capacitor; the first end of the fourth capacitor is also connected to the second input end of the amplifier; and the second end of the fourth capacitor is grounded.

[0018] Optionally, the amplifier comprises: a differential input unit, an amplification unit and an output unit;

[0019] The first end of the differential input unit serves as the first input end of the amplifier; the second end of the differential input unit serves as the second input end of the amplifier; the third end of the differential input unit is connected to the first end of the amplifying unit; the second end of the amplifying unit is connected to the first end of the output unit; the second end of the output unit serves as the output end of the amplifier;

[0020] The differential input unit is used to suppress interference and zero drift; the amplification unit is used to provide gain; and the output unit is used to provide load capacity for output.

[0021] Optionally, the impedance matching module includes: a second resistor;

[0022] The first end of the second resistor is connected to the output end of the amplifier module; the second end of the second resistor is connected to the load.

[0023] Optionally, the current regulating module includes: a diode;

[0024] The anode of the diode is connected to the impedance matching module; the cathode of the diode is connected to the load.

[0025] According to another aspect of the present invention, a controller is further provided. The controller includes the short-circuit protection circuit described in any one of the above embodiments.

[0026] According to another aspect of the utility model, there is also an electric two-wheeled vehicle, which includes a side support Hall switch and the controller described in the previous embodiment; the load includes the side support Hall switch.

[0027] The embodiment of the utility model isolates the power supply and the load through the amplifier module, uses the impedance matching module to match the impedance of the load with the output impedance of the amplifier module, protects the amplifier module through the current regulating module, and feeds back the voltage output to the load to the amplifier module through the voltage stabilizing module, thereby stabilizing the output voltage of the amplifier module. The embodiment of the utility model isolates the power supply and the load through the amplifier module, which is conducive to reducing the impact of the load fault on the power supply and avoiding the expansion of the fault.

[0028] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of a short circuit protection circuit provided by an embodiment of the utility model;

[0031] Figure 2 It is a schematic diagram of a short circuit protection circuit provided by an embodiment of the utility model;

[0032] Figure 3 This is a schematic diagram of an amplifier structure provided by an embodiment of the utility model;

[0033] Figure 4 It is a schematic diagram of a controller provided by an embodiment of the utility model;

[0034] Figure 5 It is a schematic diagram of an electric two-wheeled vehicle provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] The embodiment of the utility model provides a short-circuit protection circuit, which isolates a load from a power supply, thereby preventing a load failure from impacting the power supply and reducing the risk of the failure expanding. Figure 1 Schematic diagram of a short circuit protection circuit provided by an embodiment of the utility model. Figure 1 The circuit includes: an amplifier module 110, an impedance matching module 120, a current regulation module 130 and a voltage stabilization module 140.

[0038] The first input end of the amplifier module 110 is connected to the power supply 100; the amplifier module 110 is used to isolate the power supply 100 from the load 200; the impedance matching module 120 is connected to the output end of the amplifier module 110; the current regulation module 130 is connected between the impedance matching module 120 and the load 200; the current regulation module 130 is used to limit the current direction; the first end of the voltage stabilizing module 140 is connected to the load 200; the second end of the voltage stabilizing module 140 is connected to the output end of the amplifier module 110; the third end of the voltage stabilizing module 140 is connected to the second input end of the amplifier module 110; the voltage stabilizing module 140 is used to stabilize the output voltage of the amplifier module 110.

[0039] Specifically, the amplifier module 110 isolates the output voltage of the power supply 100. It should be noted that the gain of the amplifier module 110 is one; that is, the output voltage of the amplifier module 110 is the same as the output voltage of the power supply 100, but the amplifier module 110 has an amplifying effect on the output current of the power supply 100. The amplifier module 110 has the characteristics of high impedance and low internal resistance. Therefore, it is necessary to set an impedance matching module 120 to match the output impedance of the amplifier module 110 with the impedance of the load 200, so as to eliminate signal reflection. The main function of the current regulation module 130 is to limit the direction of the current to ensure that the current flows in the expected direction, thereby avoiding the influence of the high voltage of the load 200 on the amplifier module 110, thereby protecting the amplifier module 110. The voltage stabilization module 140 feeds back the voltage output to the load 200 to the amplifier module 110, so that the output voltage of the amplifier module 110 remains stable.

[0040] The embodiment of the utility model isolates the power supply 100 and the load 200 through the amplifier module 110, uses the impedance matching module 120 to match the impedance of the load 200 with the output impedance of the amplifier module 110, protects the amplifier module 110 through the current regulation module 130, and feeds back the voltage output to the load 200 to the amplifier module 110 through the voltage stabilization module 140, thereby stabilizing the output voltage of the amplifier module 110. The embodiment of the utility model isolates the power supply 100 and the load 200 through the amplifier module 110, which is conducive to reducing the impact of the load 200 fault on the power supply 100 and avoiding the expansion of the fault.

[0041] Figure 2 It is a schematic diagram of a short circuit protection circuit provided by an embodiment of the utility model. Based on the above embodiment, optionally, refer to Figure 2 The voltage stabilizing module 140 includes: a first resistor R1 and a first capacitor C1.

[0042] The first end of the first resistor R1 is connected to the load 200; the second end of the first resistor R1 is connected to the second input end of the amplifier module 110; the first end of the first capacitor C1 is connected to the second end of the first resistor R1; the first end of the first capacitor C1 is connected to the output end of the amplifier module 110.

[0043] Specifically, the first capacitor C1 is used to smooth the output voltage of the amplifier module 110 and absorb ripples and noise. The first capacitor C1 and the first resistor R1 are used to stabilize the output voltage of the amplifier module 110 to provide a stable voltage for the load 200 .

[0044] Based on the above embodiments, optionally, continue to refer to Figure 2 , the amplifier module 110 includes: an amplifier U0 and a second capacitor C2.

[0045] The first input terminal of the amplifier U0 is connected to the power supply 100; the second input terminal of the amplifier U0 is connected to the voltage stabilizing module 140; the output terminal of the amplifier U0 is connected to the impedance matching module 120; the power supply terminal V+ of the amplifier U0 is connected to the power supply 100; the ground terminal GND of the amplifier U0 is grounded; the first end of the second capacitor C2 is connected to the power supply 100; and the second end of the second capacitor C2 is grounded.

[0046] Specifically, the input impedance of the amplifier U0 is high, so the current it obtains in the power supply 100 is small, which is helpful to improve the load capacity of the circuit, and through the characteristics of high input impedance and low output impedance of the amplifier U0, it can effectively connect the power supply 100 and the load 200, and protect the power supply 100 from the influence of the load 200. The second capacitor C2 is a decoupling capacitor, which is used to eliminate interference and noise input to the first input terminal of the amplifier U0. It should be noted that the capacitance of the second capacitor C2 can be customized according to the actual needs of the actual application, and this embodiment does not limit this.

[0047] Based on the above embodiments, optionally, continue to refer to Figure 2 , the amplifier module 110 further includes: a third capacitor C3.

[0048] The third capacitor C3 is connected between the power terminal V+ of the amplifier U0 and the ground terminal GND of the amplifier U0 .

[0049] Specifically, the third capacitor C3 is also a decoupling capacitor, which is used to eliminate interference and noise input to the power supply terminal V+ of the amplifier U0. It should be noted that the capacitance of the third capacitor C3 can be customized according to actual needs in actual applications, and this embodiment does not limit this.

[0050] Based on the above embodiments, optionally, continue to refer to Figure 2 , the amplifier module 110 further includes: a fourth capacitor C4.

[0051] The first end of the fourth capacitor C4 is connected to the second end of the second capacitor C2; the first end of the fourth capacitor C4 is also connected to the second input end of the amplifier U0; and the second end of the fourth capacitor C4 is grounded.

[0052] Specifically, the fourth capacitor C4 is used to eliminate interference and noise input to the first input terminal of the amplifier U0, and eliminate interference and noise input to the second input terminal of the amplifier U0. It should be noted that the capacitance of the fourth capacitor C4 can be customized according to actual needs in actual applications, and this embodiment does not limit this.

[0053] Figure 3Schematic diagram of an amplifier structure provided by an embodiment of the utility model. Based on the above embodiments, optionally, in combination with Figure 2 and Figure 3 The amplifier U0 includes: a differential input unit 310 , an amplifying unit 320 and an output unit 330 .

[0054] The first end of the differential input unit 310 serves as the first input end of the amplifier U0; the second end of the differential input unit 310 serves as the second input end of the amplifier U0; the third end of the differential input unit 310 is connected to the first end of the amplifying unit 320; the second end of the amplifying unit 320 is connected to the first end of the output unit 330; the second end of the output unit 330 serves as the output end of the amplifier U0; the differential input unit 310 is used to suppress interference and zero drift; the amplifying unit 320 is used to provide gain; and the output unit 330 is used to provide load capacity for the output.

[0055] Based on the above embodiments, optionally, continue to refer to Figure 2 , the impedance matching module 120 includes: a second resistor R2.

[0056] The first end of the second resistor R2 is connected to the output end of the amplifier module 110, and the second end of the second resistor R2 is connected to the load 200. It should be noted that the resistance value of the second resistor R2 can be set according to actual needs in actual applications, and this embodiment does not limit this.

[0057] Based on the above embodiments, optionally, continue to refer to Figure 2 , the current regulating module 130 includes: a diode D. The anode of the diode D is connected to the impedance matching module 120; the cathode of the diode D is connected to the load 200. Specifically, the basic structure of the diode D is composed of a PN junction, and its main feature is that it has unidirectional conductivity, that is, when the polarity of the applied voltage is opposite to the direction of the current in the PN junction, the diode D is in a cut-off state, and almost no current passes; when the polarity of the applied voltage is the same as the direction of the current in the PN junction, the diode D is in a conducting state, and current can pass.

[0058] The embodiment of the utility model also provides a controller. Figure 4 Schematic diagram of a controller provided by an embodiment of the utility model. Figure 4 , the controller 10 includes the short circuit protection circuit 20 provided in any of the above embodiments. It should be noted that the controller 10 provided in the embodiment of the utility model has the beneficial effects of the short circuit protection circuit 20 provided in any of the above embodiments, which will not be described in detail here.

[0059] The embodiment of the utility model also provides an electric two-wheeled vehicle. Figure 5Schematic diagram of an electric two-wheeled vehicle provided by an embodiment of the utility model. Figure 5 The electric two-wheeled vehicle 40 includes a side support Hall switch 30 and the controller 10 provided in the above embodiment; the load 200 includes a side support Hall switch 30. It should be noted that the electric two-wheeled vehicle 40 provided in the embodiment of the utility model has the beneficial effects of the short-circuit protection circuit 20 provided in any of the above embodiments, which will not be repeated here.

[0060] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0061] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A short circuit protection circuit, characterized in that: include: An amplifier module, wherein a first input terminal of the amplifier module is connected to a power supply; the amplifier module is used to isolate the power supply from a load; An impedance matching module, wherein the impedance matching module is connected to an output end of the amplifier module; A current regulating module, the current regulating module is connected between the impedance matching module and the load; the current regulating module is used to limit the current direction; A voltage stabilizing module, wherein a first end of the voltage stabilizing module is connected to the load; a second end of the voltage stabilizing module is connected to the output end of the amplifier module; a third end of the voltage stabilizing module is connected to the second input end of the amplifier module; and the voltage stabilizing module is used to stabilize the output voltage of the amplifier module.

2. The short circuit protection circuit according to claim 1, characterized in that: The voltage stabilizing module comprises: a first resistor and a first capacitor; The first end of the first resistor is connected to the load; the second end of the first resistor is connected to the second input end of the amplifier module; the first end of the first capacitor is connected to the second end of the first resistor; and the first end of the first capacitor is connected to the output end of the amplifier module.

3. The short circuit protection circuit according to claim 1, characterized in that: The amplifier module comprises: an amplifier and a second capacitor; The first input end of the amplifier is connected to the power supply; the second input end of the amplifier is connected to the voltage stabilizing module; the output end of the amplifier is connected to the impedance matching module; the power supply end of the amplifier is connected to the power supply; the ground end of the amplifier is grounded; the first end of the second capacitor is connected to the power supply; and the second end of the second capacitor is grounded.

4. The short circuit protection circuit according to claim 3, characterized in that: The amplifier module further includes: a third capacitor; The third capacitor is connected between the power supply terminal of the amplifier and the ground terminal of the amplifier.

5. The short circuit protection circuit according to claim 3, characterized in that: The amplifier module further includes: a fourth capacitor; The first end of the fourth capacitor is connected to the second end of the second capacitor; the first end of the fourth capacitor is also connected to the second input end of the amplifier; and the second end of the fourth capacitor is grounded.

6. The short circuit protection circuit according to claim 3, characterized in that: The amplifier comprises: a differential input unit, an amplifying unit and an output unit; The first end of the differential input unit serves as the first input end of the amplifier; the second end of the differential input unit serves as the second input end of the amplifier; the third end of the differential input unit is connected to the first end of the amplifying unit; the second end of the amplifying unit is connected to the first end of the output unit; the second end of the output unit serves as the output end of the amplifier; The differential input unit is used to suppress interference and zero drift; the amplification unit is used to provide gain; and the output unit is used to provide load capacity for output.

7. The short circuit protection circuit according to claim 1, characterized in that: The impedance matching module includes: a second resistor; The first end of the second resistor is connected to the output end of the amplifier module; the second end of the second resistor is connected to the load.

8. The short circuit protection circuit according to claim 1, characterized in that: The current regulating module comprises: a diode; The anode of the diode is connected to the impedance matching module; the cathode of the diode is connected to the load.

9. A controller, characterized in that: include: A short circuit protection circuit as claimed in any one of claims 1 to 8.

10. An electric two-wheeled vehicle, characterized in that: It comprises a side support Hall switch and a controller as claimed in claim 9; the load comprises the side support Hall switch.

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