A two-wheeler charger using infrared communication

Abstract

The present invention provides a two-wheeler charger using infrared communication, belonging to the technical field of battery charging. The infrared sending and receiving module on the two-wheeler charger is used to conduct infrared communication with a host computer or a remote control device. According to the content of the custom charging protocol sent by the host computer or the remote control device, the charger main circuit outputs an adjusted charging voltage to realize the adjustment of the charging parameters of the two-wheeler charger. The present invention adds a low-cost infrared sending and receiving module in the charger, simplifies the processes of charger parameter adjustment, firmware model upgrade and matching verification; simplifies the internal structure of the charger circuit through the design of the charging parameter adjustment module, reduces the volume and weight of the charger, and ensures the stability of the output of the adjusted charger parameters.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery charging, and particularly relates to a two-wheeled vehicle charger using infrared communication. Background Art

[0002] The charging performance of two-wheeled electric vehicles can verify the battery life of the electric vehicles. Therefore, a series of strict parameter indicators should be ensured for the two-wheeled vehicle charger itself. Parameter indicators including charging voltage, maximum constant current value, conversion current, trickle current value, duration of various protection timings, etc. need to be repeatedly tested and adjusted during the production process to meet relevant standards. The current parameter testing and adjustment are mainly traditional contact types. For example, wired signal interfaces or jigs are used for debugging. Although some manufacturers use protocols such as RS485, RS232, or Single In-line Function (SIF) to adjust the output parameters of the charger during the production process, the above methods all require reserved interfaces on the charger body and the design of signal lines (generally 4 or more signal lines) and signal processing modules, resulting in problems such as an increase in the charger volume, complex circuits, and easy poor contact short circuits during the burning process of protocol content.

[0003] The above testing and adjustment processes often also require a dedicated connector or jig to be connected to the charger to proceed. If there is a need to upgrade the charger firmware, the charger must also be disassembled and upgraded using the corresponding interface. The testing, adjustment, and upgrade processes are time-consuming and laborious. In addition, even if the output parameters of the charger are adjusted using the above methods, problems such as unstable output parameters may occur due to factors such as controller device noise, external electromagnetic environment interference, and internal low-voltage source interference of the controller device. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the present invention proposes a two-wheeled vehicle charger using infrared communication to simplify the adjustment process of charger parameters, reduce the charger volume, and ensure the stability of the adjusted charger parameters.

[0005] To achieve the above object, the present invention adopts the following technical solution: A two-wheeled vehicle charger using infrared communication includes a charger main circuit, a control module, and an infrared transmitting and receiving module. The infrared transmitting and receiving module is connected to the control module, and the control module is connected to the charger main circuit. The infrared transmitting and receiving module on the two-wheeled vehicle charger performs infrared communication with the infrared transmitting and receiving module of the upper computer or the remote control device. Thus, according to the custom charging protocol content sent by the upper computer or the remote control device through the infrared transmitting and receiving module, the control module is used to control the charger main circuit to output an adjusted charging voltage, realizing the adjustment of the charging parameters of the two-wheeled vehicle charger.

[0006] Furthermore, the content of the custom charging protocol includes battery type, battery nominal voltage, message reply, no-load state pulse output, conversion current value, total charging timing time, trickle charging current value, first-stage constant current value, first-stage constant current limit, second-stage constant current value, second-stage constant current limit, charging voltage value, voltage deviation, current deviation, communication message format and content.

[0007] Furthermore, the main charger circuit includes a rectification module, a switching power supply module, an output module, and a charging parameter adjustment module; the input end of the rectification module is connected to the mains power supply, the output end of the rectification module is connected to the input end of the switching power supply module, the output end of the switching power supply module is connected to the input end of the output module and the first input end of the charging parameter adjustment module, the input end of the output module is connected to the first input end of the charging parameter adjustment module, the output end of the output module is connected to the second input end of the charging parameter adjustment module, the output end of the output module serves as the first output end of the main charger circuit, and the output end of the charging parameter adjustment module serves as the second output end of the main charger circuit for outputting the adjusted charging voltage.

[0008] Furthermore, the output module includes an output capacitor CO, a resistor R1, a resistor R2, a switch S1, a switch S2, and a switch S3. The first end of the output capacitor CO is connected to the positive output end of the switching power supply module, the second end of the output capacitor CO is connected to the negative output end of the switching power supply module, the first end of the resistor R1 is connected to the first end of the output capacitor CO, the second end of the resistor R1 is connected to the first end of the resistor R2 and the first end of the switch S1, the second end of the resistor R2 is connected to the second end of the switch S1, the second end of the switch S1 is connected to the first end of the switch S2 and the first end of the switch S3, the second end of the switch S3 is connected to the negative output end of the switching power supply module, and the second end of the switch S2 serves as the first output end of the main charger circuit.

[0009] Further, the charging parameter adjustment module includes a first adjustment unit and a second adjustment unit. The first adjustment unit includes an operational amplifier AMP1, a resistor RIN, a switch SW1, and an adjustable resistor unit AR; the second adjustment unit includes an operational amplifier AMP2, a switch SW2, a resistor R11, a resistor R21, a resistor R31, and a capacitor C11. The first input terminal IN1 of the charging parameter adjustment module is connected to the positive input terminal of the operational amplifier AMP1. The second input terminal IN2 of the charging parameter adjustment module is connected to the negative input terminal of the operational amplifier AMP1 through the resistor RIN. The output terminal of the operational amplifier AMP1 is connected to the control terminal of the switch SW1. The first terminal of the switch SW1 is connected to the negative input terminal of the operational amplifier AMP1. The second terminal of the switch SW1 is connected to the a terminal of the adjustable resistor unit AR and the positive input terminal of the operational amplifier AMP2. The output terminal of the operational amplifier AMP2 is connected to the control terminal of the switch SW2. The first terminal of the switch SW2 is connected to VDD and the power supply terminal of the operational amplifier AMP1. The second terminal of the switch SW2 is connected to the first terminal of the resistor R11. The second terminal of the resistor R11 is connected to the first terminal of the resistor R21 and the negative input terminal of the operational amplifier AMP2. The second terminal of the resistor R21 is commonly connected to the ground terminal with the b terminal of the adjustable resistor unit AR. The resistor R31 and the capacitor C11 are connected in parallel between the first terminal of the resistor R11 and the ground terminal. The first terminal of the resistor R11 serves as the second output terminal of the charger main circuit.

[0010] Optionally, the adjustable resistor unit AR includes resistors AR11, AR21, AR31, ……, ARN1, switches SR11, SR21, SR31, ……, SRN1, where N is an integer greater than 3. The first terminal of the resistor AR11 is connected to the a terminal of the adjustable resistor unit AR. The second terminal of the resistor AR11 is connected to the first terminal of the switch SR11. The second terminal of the switch SR11 is connected to the b terminal of the adjustable resistor unit AR. The resistor AR21 and the switch SR21 are connected in series and then connected in parallel between the a terminal and the b terminal of the adjustable resistor unit AR. The resistor AR31 and the switch SR31 are connected in series and then connected in parallel between the a terminal and the b terminal of the adjustable resistor unit AR. The resistor ARN1 and the switch SRN1 are connected in series and then connected in parallel between the a terminal and the b terminal of the adjustable resistor unit AR. The control terminals of the switches SR11, SR21, SR31, ……, SRN1 receive control signals.

[0011] Optionally, the adjustable resistor unit AR includes resistors AR12, AR22, AR32, ……, ARN2, switches SR12, SR22, SR32, ……, SRN2, where N is an integer greater than 3. The first end of resistor AR12 is connected to terminal a of the adjustable resistor unit AR, the second end of resistor AR12 is connected to the first end of resistor AR22, the second end of resistor AR22 is connected to the first end of resistor AR32, the second end of resistor ARN2 is connected to terminal b of the adjustable resistor unit AR, the first end of switch SR12 is connected to the second end of resistor AR12, the second end of switch SR12 is connected to terminal b of the adjustable resistor unit AR, the first end of switch SR22 is connected to the second end of resistor AR22, the second end of switch SR22 is connected to terminal b of the adjustable resistor unit AR, the first end of switch SR32 is connected to the second end of resistor AR32, the second end of switch SR32 is connected to terminal b of the adjustable resistor unit AR, the first end of switch SRN2 is connected to the first end of resistor ARN2, and the second end of switch SRN2 is connected to terminal b of the adjustable resistor unit AR.

[0012] The beneficial technical effects of the present invention compared with the prior art are as follows:

[0013] (1) A low-cost infrared transmitting and receiving module is added to the charger, which can automatically adjust parameters during the production and repair of two-wheeler chargers. Even if the charger product has been potted, produced, or is in use, parameters can be adjusted without disassembling the charger, simplifying the process of adjusting charger parameters. Charger users and dealers can also upgrade the charger firmware model and verify infrared signal matching according to needs using the infrared transmitting and receiving module, which plays a role in updating products and anti-counterfeiting identification.

[0014] (2) The charging parameter adjustment module of the present invention can play a dual role of charging parameter adjustment and overcurrent protection, eliminating the need for separate design and installation of the overcurrent protection module of the charger, simplifying the internal structure of the charger circuit, providing a certain structural space for the design and installation of the infrared transmitting and receiving module of the present invention, and objectively reducing the volume and weight of the charger.

[0015] (3) The charging parameter adjustment module of the present invention uses the first voltage regulating unit to adjust the output voltage of the charger, with a simple control program and reduced main control load; the second voltage regulating unit is used to decouple the output voltage of the charger from the internal low-voltage source of the controller device, ensuring the stability of the charger output voltage. Description of the Drawings

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0017] Figure 1 It is a schematic structural diagram of the main circuit of the charger of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the charging parameter adjustment module of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the first embodiment of the adjustable resistance unit of the present invention;

[0020] Figure 4 It is a schematic structural diagram of the second embodiment of the adjustable resistance unit of the present invention. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] The following will first explain the concepts involved in the present application with reference to the accompanying drawings. It should be noted here that the explanations of the following concepts are only for making the content of the present application easier to understand, and do not represent a limitation on the protection scope of the present application; at the same time, without conflict, the embodiments and the features in the embodiments of the present application can be combined with each other. The following will detail the present application with reference to the accompanying drawings and embodiments.

[0023] Combined with the specification appendix Figure 1, the present invention provides a two-wheeler charger using infrared communication, which includes a charger main circuit, a control module, and an infrared transmitting and receiving module. The infrared transmitting and receiving module is connected to the control module, and the control module is connected to the charger main circuit. The infrared transmitting and receiving module on the two-wheeler charger communicates with the infrared transmitting and receiving module of the host computer or the remote control device through infrared rays. Thus, according to the custom charging protocol content sent by the host computer or the remote control device through the infrared transmitting and receiving module, the control module is used to control the charger main circuit to output an adjusted charging voltage, realizing the adjustment of the charging parameters of the two-wheeler charger. The charger itself can also send an infrared signal to the host computer through the infrared transmitting and receiving module for model matching verification and anti-counterfeiting identification of the charger. In addition, the production and maintenance processes of the charger can also use infrared signals to identify the load charging status and fault types.

[0024] The custom charging protocol content includes battery type, battery nominal voltage, message reply (i.e., the "handshake" link), no-load state pulse output, conversion current value, total charging timing time, trickle charging current value, first-stage constant current value, first-stage constant current limit time, second-stage constant current value, second-stage constant current limit time, charging voltage value, voltage deviation, current deviation, communication message format and content. The charger can store the custom charging protocol content in the single-chip microcomputer eeprom and use it as the basis for modifying the output parameters of the charger.

[0025] Further combined with Figure 1 , the charger main circuit includes a rectification module DB, a switch-mode power supply module SMPS, an output module OT, and a charging parameter adjustment module D. The rectification module DB uses a diode rectifier bridge, whose input terminal is connected to the mains AC, and the output terminal is connected to the input terminal of the switch-mode power supply module SMPS. The output terminal of the switch-mode power supply module SMPS is connected to the input terminal of the output module OT and the first input terminal of the charging parameter adjustment module D. The input terminal of the output module OT and the first input terminal of the charging parameter adjustment module D are connected. The output terminal of the output module OT is connected to the second input terminal of the charging parameter adjustment module D. The output terminal of the output module OT is used as the first output terminal Vo1 of the charger main circuit, and the output terminal of the charging parameter adjustment module D is used as the second output terminal Vo2 of the charger main circuit for outputting the adjusted charging voltage. Here, the switch-mode power supply module SMPS uses a flyback switch-mode power supply with a closed-loop control loop, which can ensure that the output voltage or output current of the charger main circuit follows the reference value, realizing the adjustable and controllable output signal.

[0026] The output module OT includes an output capacitor CO, a resistor R1, a resistor R2, a switch S1, a switch S2, and a switch S3. The first terminal of the output capacitor CO is connected to the positive output terminal of the switch power supply module SMPS, and the second terminal of the output capacitor CO is connected to the negative output terminal of the switch power supply module SMPS. The first terminal of the resistor R1 is connected to the first terminal of the output capacitor CO, and the second terminal of the resistor R1 is connected to the first terminal of the resistor R2 and the first terminal of the switch S1. The second terminal of the resistor R2 is connected to the second terminal of the switch S1. The second terminal of the switch S1 is connected to the first terminal of the switch S2 and the first terminal of the switch S3. The second terminal of the switch S3 is connected to the negative output terminal of the switch power supply module SMPS. The second terminal of the switch S2 serves as the first output terminal of the charger main circuit. The switches S1, S2, and S3 can be MOS transistors, IGBT transistors, or other types of switching devices. The output capacitor CO can be an aluminum capacitor or a tantalum capacitor, which is used for filtering and regulating the output voltage of the switch power supply module SMPS.

[0027] Combined with Figure 2 , the charging parameter adjustment module D includes a first adjustment unit and a second adjustment unit. The first adjustment unit includes an operational amplifier AMP1, a resistor RIN, a switch SW1, and an adjustable resistor unit AR. The second adjustment unit includes an operational amplifier AMP2, a switch SW2, a resistor R11, a resistor R21, a resistor R31, and a capacitor C11. The first input terminal IN1 of the charging parameter adjustment module is connected to the positive input terminal of the operational amplifier AMP1. The second input terminal IN2 of the charging parameter adjustment module is connected to the negative input terminal of the operational amplifier AMP1 through the resistor RIN. The output terminal of the operational amplifier AMP1 is connected to the control terminal of the switch SW1. The first terminal of the switch SW1 is connected to the negative input terminal of the operational amplifier AMP1. The second terminal of the switch SW1 is connected to the a terminal of the adjustable resistor unit AR and the positive input terminal of the operational amplifier AMP2. The output terminal of the operational amplifier AMP2 is connected to the control terminal of the switch SW2. The first terminal of the switch SW2 is connected to VDD and the power supply terminal of the operational amplifier AMP1. The second terminal of the switch SW2 is connected to the first terminal of the resistor R11. The second terminal of the resistor R11 is connected to the first terminal of the resistor R21 and the negative input terminal of the operational amplifier AMP2. The second terminal of the resistor R21 is commonly connected to the ground terminal with the b terminal of the adjustable resistor unit AR. The resistor R31 and the capacitor C11 are connected in parallel between the first terminal of the resistor R11 and the ground terminal. The first terminal of the resistor R11 serves as the second output terminal Vo2 of the charger main circuit.

[0028] The following is combined with the specification appendix Figure 1 and Figure 2, Briefly introduce the working principle of the present invention. When the host computer or the remote control device does not send a custom charging protocol or the charging voltage value in the sent custom charging protocol is the same as the current charging voltage value, the main controller (not shown in the figure) controls the switch S1 and the switch S2 to conduct, and the switch S3 to cut off. At this time, the switching power supply module SMPS outputs Vo1 through the resistor R1, the switch S1 and the switch S2 to charge the external load. The main controller realizes the closed-loop control of the switching power supply module SMPS. At the same time, the charging parameter adjustment module D collects the output signal on the resistor R1, and outputs the collected signal through the output terminal of the charging parameter adjustment module D (combined with Figure 1 the OUT pin in

[0029] ), and feeds it back to the main controller. When the collected signal received by the main controller exceeds the preset threshold, it is considered that the charger main circuit is overcurrent at this time, and the switch S2 is controlled to disconnect to protect the load. The adjustable resistor unit AR maintains the initial state unchanged when the charging parameter adjustment module D outputs the collected signal; when the charging voltage value in the custom charging protocol sent by the host computer or the remote control device is different from the current charging voltage value, that is, when the output parameters of the charger need to be adjusted, the main controller controls the switch S1 and the switch S3 to conduct, and the switch S2 to cut off, and uses the charging parameter adjustment module D to output Vo2 to charge the external load, and uses the main controller to adjust the output Vo2 of the charging parameter adjustment module D to match the charging voltage value in the custom charging protocol. Figure 2 Furthermore, in combination with Figure 2 , when the output parameters of the charger need to be adjusted, by using the main controller to output the control signal CTRL, only by changing the equivalent resistance value at both ends of the adjustable resistor unit AR, the output Vo2 of the charging parameter adjustment module D can be adjusted. The charging parameter adjustment control program is simple and can effectively reduce the main control load. As AR known, the output Vo2 of the charging parameter adjustment module D can be calculated by the following formula: Vo2 = [R CO ×V IN -1 + [([R AR ×V CO ×R 11 ) × (R 21 ×R IN ) -1 , where R AR represents the equivalent resistance of the adjustable resistor unit AR, V CO represents the voltage on the output capacitor CO, R IN represents the resistance value of the resistor RIN, R 11 represents the resistance value of the resistor R11, and R 21represents the resistance value of resistor R21. First, the output of operational amplifier AMP1 serves as the driving signal for switch SW1. Utilizing the high input impedance characteristic of operational amplifier AMP1 can reduce the influence of control device noise, external electromagnetic environment interference, and internal low-voltage source interference of the control device on the output signal, ensuring the rapid conduction of switch SW1, thereby constructing an equivalent current source and generating a first adjustment voltage across the adjustable resistor unit AR of the first adjustment unit; then input this first adjustment voltage into the second adjustment unit, and utilize the high input impedance characteristic of operational amplifier AMP2 to generate a relatively stable error signal to drive switch SW2, controlling the signal output by the second adjustment unit (that is, Figure 2 the signal at the OUT pin in

[0030] Figure 3 , namely the second adjustment voltage) to be decoupled from the internal low-voltage source VDD of the control device, avoiding the serious influence on the signal output by the second adjustment unit caused by the offset of the internal low-voltage source VDD of the control device due to noise pollution, and further stabilizing the output Vo2 of the charging parameter adjustment module D.

[0031] Figure 4 Shows a first embodiment of the adjustable resistor unit. The adjustable resistor unit AR includes resistor AR11, resistor AR21, resistor AR31,..., resistor ARN1, switches SR11, SR21, SR31,..., SRN1, where N is an integer greater than 3. The first end of resistor AR11 is connected to the a end of the adjustable resistor unit AR, the second end of resistor AR11 is connected to the first end of switch SR11, the second end of switch SR11 is connected to the b end of the adjustable resistor unit AR, resistor AR21 and switch SR21 are connected in series and then paralleled between the a end and the b end of the adjustable resistor unit AR, resistor AR31 and switch SR31 are connected in series and then paralleled between the a end and the b end of the adjustable resistor unit AR, resistor ARN1 and switch SRN1 are connected in series and then paralleled between the a end and the b end of the adjustable resistor unit AR. The control terminals of switches SR11, SR21, SR31,..., SRN1 receive the control signal CTRL output by the main controller, thereby adjusting the number of resistors incorporated between the a end and the b end, and further adjusting the equivalent resistance of the adjustable resistor unit AR. For example, when switches SR11 and SR21 are closed, resistor AR11 and resistor AR21 are connected in parallel and then connected in series between the a end and the b end. Compared with only resistor AR11 being connected in series between the a end and the b end, the resistance value is reduced. It should be understood that switches SR11, SR21, SR31,..., SRN1 can also be MOS transistors, IGBT transistors, or other types of switching devices, and at least one of the switches should be a normally-on switch. The number of N can be flexibly set according to the adjustment range of the charger output parameters.

[0031] Figure 4Shows a second embodiment of the adjustable resistor unit. The adjustable resistor unit AR includes resistors AR12, AR22, AR32, ……, ARN2, switches SR12, SR22, SR32, ……, SRN2, where N is an integer greater than 3. The first end of resistor AR12 is connected to the a end of the adjustable resistor unit AR, the second end of resistor AR12 is connected to the first end of resistor AR22, the second end of resistor AR22 is connected to the first end of resistor AR32, and the second end of resistor ARN2 is connected to the b end of the adjustable resistor unit AR. The first end of switch SR12 is connected to the second end of resistor AR12, and the second end of switch SR12 is connected to the b end of the adjustable resistor unit AR. The first end of switch SR22 is connected to the second end of resistor AR22, and the second end of switch SR22 is connected to the b end of the adjustable resistor unit AR. The first end of switch SR32 is connected to the second end of resistor AR32, and the second end of switch SR32 is connected to the b end of the adjustable resistor unit AR. The first end of switch SRN2 is connected to the first end of resistor ARN2, and the second end of switch SRN2 is connected to the b end of the adjustable resistor unit AR. Similar to Figure 3 , by the control signal CTRL output by the main controller, the on / off states of switches SR12, SR22, SR32, ……, SRN2 can be controlled, thereby adjusting the equivalent resistance of the adjustable resistor unit AR. Switches SR12, SR22, SR32, ……, SRN2 can also be MOS transistors, IGBT transistors or other types of switching devices, and switch SR12 can be a normally-on switch.

[0032] The above-described embodiments and / or implementation manners are only used to illustrate the preferred embodiments and / or implementation manners for implementing the technology of the present invention, and do not impose any formal restrictions on the implementation manners of the technology of the present invention. Any person skilled in the art, without departing from the scope of the technical means disclosed in the content of the present invention, may make some modifications or changes to other equivalent embodiments, but should still be regarded as the same technology or embodiment as the present invention in essence.

[0033] Specific examples are used in this article to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. The above are only the preferred implementation manners of the present application. It should be noted that due to the limitation of literal expression and objectively existing infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the inventive concept and technical solution to other occasions without improvement, should all be regarded as the protection scope of the present application.

Claims

1. A two-wheeler charger using infrared communication, comprising a charger main circuit, a control module, and an infrared sending and receiving module. The infrared sending and receiving module is connected to the control module, and the control module is connected to the charger main circuit. It is characterized in that, The infrared transmission and reception module on the two-wheeler charger communicates with the infrared transmission and reception module of the host computer or remote control device via infrared rays. Thus, according to the custom charging protocol content sent by the host computer or remote control device through the infrared transmission and reception module, the control module is used to control the charger main circuit to output an adjusted charging voltage, achieving the adjustment of the charging parameters of the two-wheeler charger; The charger main circuit includes a rectification module, a switching power supply module, an output module, and a charging parameter adjustment module; the input end of the rectification module is connected to the mains power supply, the output end of the rectification module is connected to the input end of the switching power supply module, the output end of the switching power supply module is connected to the input end of the output module and the first input end of the charging parameter adjustment module, the input end of the output module and the first input end of the charging parameter adjustment module are connected, the output end of the output module is connected to the second input end of the charging parameter adjustment module, the output end of the output module serves as the first output end of the charger main circuit, and the output end of the charging parameter adjustment module serves as the second output end of the charger main circuit, for outputting the adjusted charging voltage; The output module includes an output capacitor CO, a resistor R1, a resistor R2, a switch S1, a switch S2, and a switch S3. The first end of the output capacitor CO is connected to the positive output end of the switching power supply module, the second end of the output capacitor CO is connected to the negative output end of the switching power supply module, the first end of the resistor R1 is connected to the first end of the output capacitor CO, the second end of the resistor R1 is connected to the first end of the resistor R2 and the first end of the switch S1, the second end of the resistor R2 and the second end of the switch S1 are connected, the second end of the switch S1 is connected to the first end of the switch S2 and the first end of the switch S3, the second end of the switch S3 is connected to the negative output end of the switching power supply module, and the second end of the switch S2 serves as the first output end of the charger main circuit.

2. The two-wheeler charger using infrared communication according to claim 1, wherein The custom charging protocol content includes battery type, battery nominal voltage, message reply, no-load state pulse output, conversion current value, total charging timing time, trickle charging current value, first-stage constant current value, first-stage constant current limit time, second-stage constant current value, second-stage constant current limit time, charging voltage value, voltage deviation, current deviation, communication message format and content.

3. The two-wheeler charger using infrared communication according to claim 1, characterized in that, The charging parameter adjustment module includes a first adjustment unit and a second adjustment unit. The first adjustment unit includes an operational amplifier AMP1, a resistor RIN, a switch SW1, and an adjustable resistor unit AR. The second adjustment unit includes an operational amplifier AMP2, a switch SW2, a resistor R11, a resistor R21, a resistor R31, and a capacitor C11. The first input terminal IN1 of the charging parameter adjustment module is connected to the positive input terminal of the operational amplifier AMP1. The second input terminal IN2 of the charging parameter adjustment module is connected to the negative input terminal of the operational amplifier AMP1 through the resistor RIN. The output terminal of the operational amplifier AMP1 is connected to the control terminal of the switch SW1. The first terminal of the switch SW1 is connected to the negative input terminal of the operational amplifier AMP1. The second terminal of the switch SW1 is connected to the a terminal of the adjustable resistor unit AR and the positive input terminal of the operational amplifier AMP2. The output terminal of the operational amplifier AMP2 is connected to the control terminal of the switch SW2. The first terminal of the switch SW2 is connected to VDD and the power supply terminal of the operational amplifier AMP1. The second terminal of the switch SW2 is connected to the first terminal of the resistor R11. The second terminal of the resistor R11 is connected to the first terminal of the resistor R21 and the negative input terminal of the operational amplifier AMP2. The second terminal of the resistor R21 is commonly connected to the ground terminal with the b terminal of the adjustable resistor unit AR. The resistor R31 and the capacitor C11 are connected in parallel between the first terminal of the resistor R11 and the ground terminal. The first terminal of the resistor R11 serves as the second output terminal of the charger main circuit.

4. The two-wheeler charger using infrared communication according to claim 3, characterized in that, The adjustable resistor unit AR includes resistors AR11, AR21, AR31, ……, ARN1, switches SR11, SR21, SR31, ……, SRN1, where N is an integer greater than 3. The first terminal of the resistor AR11 is connected to the a terminal of the adjustable resistor unit AR. The second terminal of the resistor AR11 is connected to the first terminal of the switch SR11. The second terminal of the switch SR11 is connected to the b terminal of the adjustable resistor unit AR. The resistor AR21 and the switch SR21 are connected in series and then connected in parallel between the a terminal and the b terminal of the adjustable resistor unit AR. The resistor AR31 and the switch SR31 are connected in series and then connected in parallel between the a terminal and the b terminal of the adjustable resistor unit AR. The resistor ARN1 and the switch SRN1 are connected in series and then connected in parallel between the a terminal and the b terminal of the adjustable resistor unit AR. The control terminals of the switches SR11, SR21, SR31, ……, SRN1 receive control signals.

5. The two-wheeler charger using infrared communication according to claim 3, characterized in that The adjustable resistor unit AR includes resistors AR12, AR22, AR32, ……, ARN2, switches SR12, SR22, SR32, ……, SRN2, where N is an integer greater than 3. The first end of resistor AR12 is connected to the a end of the adjustable resistor unit AR, the second end of resistor AR12 is connected to the first end of resistor AR22, the second end of resistor AR22 is connected to the first end of resistor AR32, the second end of resistor ARN2 is connected to the b end of the adjustable resistor unit AR, the first end of switch SR12 is connected to the second end of resistor AR12, the second end of switch SR12 is connected to the b end of the adjustable resistor unit AR, the first end of switch SR22 is connected to the second end of resistor AR22, the second end of switch SR22 is connected to the b end of the adjustable resistor unit AR, the first end of switch SR32 is connected to the second end of resistor AR32, the second end of switch SR32 is connected to the b end of the adjustable resistor unit AR, the first end of switch SRN2 is connected to the first end of resistor ARN2, and the second end of switch SRN2 is connected to the b end of the adjustable resistor unit AR.

Images