Device for measuring overcurrent of electric bicycle

Abstract

The utility model relates to an over-current measuring device for an electric bicycle. Comprising a new national standard plug input end, a switch device, a digital display module, a diverter, a new national standard plug output end and a handshake protocol communication line. Wherein the input end of the switching device is connected with the power supply anode of the input end of the new national standard plug, and the output end of the switching device is connected with the anode of the output end of the new national standard plug and the digital display module; the anode of the shunt is connected with the power supply cathode of the input end of the new national standard plug, and the cathode of the shunt is connected with the power supply cathode of the output end of the new national standard plug; the diverter is connected with the digital display module; wherein the first end of the handshake protocol communication line is connected to the output end of the new national standard plug, and the second end of the handshake protocol communication line is connected to the input end of the new national standard plug. According to the technical scheme provided by the utility model, a Hall sensor is replaced by the fixed shunt, so that the current reading precision is greatly improved while the reading stability is ensured.

Description

Technical Field

[0001] The utility model relates to the field of overcurrent measurement of electric bicycles, in particular to an overcurrent measurement device for electric bicycles. Background Art

[0002] A clamp meter is also called a clamp meter. It is an instrument used to measure the current of an electrical circuit in operation. The clamp meter is composed of a current transformer and an ammeter. The iron core of the current transformer can be opened when the wrench is tightened; the wire through which the measured current passes can pass through the gap in the iron core without being cut off, and the iron core closes when the wrench is released.

[0003] However, in the prior art, when a clamp ammeter is used to measure current during riding, the reading may be unstable due to the bumps during riding, thereby making the measurement result inaccurate. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an overcurrent measurement device for an electric bicycle to solve the problem in the prior art that when using a clamp ammeter to measure current during riding, the reading will be unstable due to the bumps during riding, thereby making the measurement result inaccurate.

[0005] According to a first aspect of an embodiment of the present invention, there is provided a device for measuring overcurrent of an electric bicycle, comprising:

[0006] New national standard plug input, switch device, digital display module, shunt, new national standard plug output, handshake protocol communication line;

[0007] Wherein, the input end of the switch device is connected to the positive pole of the power supply of the input end of the new national standard plug, and the output end of the switch device is respectively connected to the positive pole of the output end of the new national standard plug and the digital display module;

[0008] The positive pole of the shunt is connected to the negative pole of the power supply at the input end of the new national standard plug, and the negative pole of the shunt is connected to the negative pole of the power supply at the output end of the new national standard plug; the shunt is connected to the digital display module;

[0009] Among them, the first end of the handshake protocol communication line is connected to the output end of the new national standard plug, and the second end is connected to the input end of the new national standard plug.

[0010] Furthermore, the digital display module comprises:

[0011] A DC-DC conversion module, which is used to convert the power of the lithium battery of the electric bicycle into a preset volt to power the system;

[0012] A voltage collection module, wherein the voltage collection module is used to collect loop current;

[0013] A display integrated module, the display integrated module is used to display the loop current collected in real time;

[0014] DC-DC conversion module, voltage acquisition module, display integrated module; wherein the DC-DC conversion module is connected to the voltage acquisition module and the display integrated module respectively; the voltage acquisition module is connected to the display integrated module.

[0015] Furthermore, it also includes:

[0016] A first terminal, a second terminal, a third terminal, and a fourth terminal;

[0017] The first wiring terminal is a DC power supply positive electrode, and the first wiring terminal is connected to the output end of the switch device;

[0018] The second wiring terminal is a negative electrode of a DC power supply, and the second wiring terminal is connected to the positive electrode of the shunt;

[0019] The third wiring terminal is a positive electrode for current collection, and the third wiring terminal is connected to the first terminal of the shunt;

[0020] The fourth wiring terminal is a negative electrode for current collection, and the fourth wiring terminal is connected to the second terminal of the shunt.

[0021] Furthermore, the DC-DC conversion module comprises:

[0022] DC-DC converter.

[0023] Furthermore, the display integration module includes: a digital display.

[0024] The technical solution provided by the embodiments of the present invention may have the following beneficial effects:

[0025] It can be understood that the technical solution provided by the present invention includes: a new national standard plug input end, a switching device, a digital display module, a shunt, a new national standard plug output end, and a handshake protocol communication line; wherein the input end of the switching device is connected to the positive pole of the power supply of the new national standard plug input end, and the output end of the switching device is respectively connected to the positive pole of the new national standard plug output end and the digital display module; the positive pole of the shunt is connected to the negative pole of the power supply of the new national standard plug input end, and the negative pole of the shunt is connected to the negative pole of the power supply of the new national standard plug output end; the shunt is connected to the digital display module; wherein the first end of the handshake protocol communication line is connected to the new national standard plug output end, and the second end is connected to the new national standard plug input end. It is understandable that the technical solution provided by the utility model uses a fixed shunt to replace the Hall sensor, which greatly increases the current reading accuracy while ensuring stable readings; in addition, by using the battery interface specified in the new national standard, the tester directly installs the main circuit plug and retains the original handshake protocol line; while ensuring smooth protocol, the test system is connected to the main circuit of the electric vehicle. The simplified operation interface makes it easy for testers to intuitively operate and read the overcurrent protection current.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0028] Figure 1 is a schematic diagram showing the overall composition of an electric bicycle overcurrent measurement device according to an exemplary embodiment;

[0029] Figure 2 The figure is a schematic diagram showing the composition of an electric bicycle overcurrent measurement device according to an exemplary embodiment. DETAILED DESCRIPTION

[0030] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0031] Embodiment 1

[0032] See also Figure 1 , Figure 1The figure is a schematic diagram showing a device for measuring overcurrent of an electric bicycle according to an exemplary embodiment, wherein the device comprises:

[0033] New national standard plug input terminal 1, switch device 5, digital display module 4, shunt 3, new national standard plug output terminal 2,

[0034] Handshake protocol communication line 6;

[0035] The input end of the switch device 5 is connected to the positive pole of the power supply of the new national standard plug input end 1, and the output end of the switch device 5 is respectively connected to the positive pole of the new national standard plug output end 2 and the digital display module 4;

[0036] The positive pole of the shunt 3 is connected to the negative pole of the power supply of the new national standard plug input terminal 1, and the negative pole of the shunt 3 is connected to the negative pole of the power supply of the new national standard plug output terminal 2; the shunt 3 is connected to the digital display module 4;

[0037] Among them, the first end of the handshake protocol communication line 6 is connected to the new national standard plug output terminal 2, and the second end is connected to the new national standard plug input terminal 1.

[0038] In one embodiment, the technical solution provided by the utility model uses a fixed shunt 3 to replace the Hall sensor, which greatly increases the current reading accuracy while ensuring stable readings; in addition, by using the battery interface specified in the new national standard, the tester directly installs the main circuit plug and retains the original handshake protocol line; while ensuring smooth protocol, the test system is connected to the main circuit of the electric vehicle. The simplified operation interface facilitates the tester to intuitively operate and read the overcurrent protection current.

[0039] Furthermore, the digital display module 4 comprises:

[0040] A DC-DC conversion module, which is used to convert the power of the lithium battery of the electric bicycle into a preset volt to power the system;

[0041] A voltage collection module, wherein the voltage collection module is used to collect loop current;

[0042] A display integrated module, the display integrated module is used to display the loop current collected in real time;

[0043] DC-DC conversion module, voltage acquisition module, display integrated module; wherein the DC-DC conversion module is connected to the voltage acquisition module and the display integrated module respectively; the voltage acquisition module is connected to the display integrated module.

[0044] Furthermore, it also includes:

[0045] A first terminal, a second terminal, a third terminal, and a fourth terminal;

[0046] The first wiring terminal is a DC power supply positive electrode, and the first wiring terminal is connected to the output end of the switch device 5;

[0047] The second wiring terminal is the negative electrode of the DC power supply, and the second wiring terminal is connected to the positive electrode of the shunt 3;

[0048] The third wiring terminal is a positive electrode for current collection, and the third wiring terminal is connected to the first terminal of the shunt 3;

[0049] The fourth wiring terminal is a negative electrode for current collection, and the fourth wiring terminal is connected to the second terminal of the shunt 3 .

[0050] For specific implementation, please refer to Figure 2 , Table 3 This module has four terminals, of which A1 (first terminal) is the positive pole of DC power supply, connected to the switch output terminal; A2 (second terminal) is the negative pole of DC power supply, connected to the shunt 3FL+; A3 (third terminal) is the positive pole of current collection, connected to the shunt 35; A4 (fourth terminal) is the negative pole of current collection, connected to the shunt 36. This module has the following three main functions:

[0051] (1) DC-DC conversion function: The module has a built-in DC-DC conversion module, which can directly use the 36V or 48V power supply of the lithium battery of the electric bicycle to convert it into 5V to power the system.

[0052] (2) Current collection function: using the voltage collection module, that is, connecting to the shunt 35 (the first terminal of the shunt 3) and 6 (the second terminal of the shunt 3) through A3 and A4, the loop current can be collected.

[0053] (3) Digital display function: using the display integrated module to display the collected real-time current.

[0054] Table 3

[0055]

[0056] Furthermore, the DC-DC conversion module comprises:

[0057] DC-DC converter.

[0058] Furthermore, the display integration module includes: a digital display.

[0059] In specific implementation, the device of the utility model removes the separate power supply and comes with a DC-DC converter, which can convert the DC 30-60V voltage of the main circuit of the electric vehicle into the 5V power supply voltage of the vehicle equipment. In addition, the electronic components in the device are all low-power components, and the influence of their own power consumption on the test measurement results is within the standard allowable range.

[0060] It should be noted that the device of the utility model is composed as follows:

[0061] 1. New national standard plug input terminal 1

[0062] The input plug has 6 terminals in total, which conforms to the new national standard and can be directly plugged into the battery of the electric vehicle. The positive pole of the power output is connected to the switch input, the negative pole is connected to the shunt 3FL+, and the communication interface is connected to the output communication interface through the communication line.

[0063] 2. Switch

[0064] The input end is connected to the positive pole of the new national standard plug input terminal 1 power supply, and the output end is connected to the positive pole of the new national standard plug output terminal 2 and power is supplied to the digital display module.

[0065] 3. Digital display module

[0066] This module has four terminals, A1 is the positive pole of DC power supply, connected to the switch output terminal; A2 is the negative pole of DC power supply, connected to the shunt 3FL+; A3 is the positive pole of current collection, connected to the shunt 35; A4 is the negative pole of current collection, connected to the shunt 36. This module has the following three main functions:

[0067] (1) DC-DC conversion function: the module has a built-in DC-DC converter, which can directly use the 36V or 48V power supply of the lithium battery of the electric bicycle to convert it into 5V to power the system.

[0068] (2) Current collection function: A3 and A4 are connected to shunts 35 and 6 to collect loop current.

[0069] (3) Digital display function, showing the real-time current collected.

[0070] 4. Shunt 3

[0071] Shunt 3 FL+ is connected to the negative pole of the new national standard plug input terminal 1, FL- is connected to the negative pole of the new national standard plug output terminal 2, 5 and 6 are connected to the digital display modules A3 and A4 respectively. Shunt 3 is used to collect current.

[0072] 5. New national standard plug output terminal 2

[0073] The input plug has 6 terminals in total, which conforms to the new national standard and can be directly connected to the main circuit of the electric vehicle. The positive pole of the power output is connected to the switch output, the negative pole is connected to the shunt 3FL-, and the communication interface is connected to the input communication interface through the communication line.

[0074] 6. Handshake protocol communication line 6

[0075] The communication part is used to connect the new national standard plug input terminal 1 and the new national standard plug output terminal 2. The function is to ensure that the battery and the electric vehicle maintain a handshake communication state during the test, thereby activating the power supply.

[0076] During the specific implementation, 1. unplug the plug connecting the battery system and the main circuit, and connect the plug to the output port of this device, and connect the input port of the device to the battery system. The input and output plugs of this device are both standard plugs specified by the new national standard. The power cord will pass through the internal measurement circuit and the communication line will be directly connected. At this point, the device will be connected in series to the main circuit of the battery, and the battery system can communicate and activate normally.

[0077] 2. After the battery system activates the output power, the DC-DC conversion module of this device starts working and automatically supplies power to the device. The device starts to display voltage and current.

[0078] 3. After the equipment is working, an overcurrent protection test can be performed. You can choose a slope of more than 20° for riding. The maximum current value before the current drops to 0 is the overcurrent protection value.

[0079] 4. After the test, disconnect the input and output ports of the equipment, reconnect the electric vehicle main circuit and battery system plug, and the test is completed.

[0080] It should be noted that this device can conveniently improve the convenience of measuring the overcurrent protection value of electric bicycles, avoiding the cumbersome connection between the traditional measuring probe and the circuit, which occasionally causes poor connection and signal disconnection. More importantly, it improves work efficiency and saves man-hours. At the same time, the measurement accuracy is high, meeting the requirements of current standards.

[0081] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0082] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0083] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0084] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0085] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0086] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0087] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0089] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A device for measuring overcurrent of an electric bicycle, characterized in that: The device comprises: New national standard plug input, switch device, digital display module, shunt, new national standard plug output, handshake protocol communication line; Wherein, the input end of the switch device is connected to the positive pole of the power supply of the input end of the new national standard plug, and the output end of the switch device is respectively connected to the positive pole of the output end of the new national standard plug and the digital display module; The positive pole of the shunt is connected to the negative pole of the power supply at the input end of the new national standard plug, and the negative pole of the shunt is connected to the negative pole of the power supply at the output end of the new national standard plug; the shunt is connected to the digital display module; Among them, the first end of the handshake protocol communication line is connected to the output end of the new national standard plug, and the second end is connected to the input end of the new national standard plug.

2. The device according to claim 1, characterized in that The digital display module comprises: A DC-DC conversion module, which is used to convert the power of the lithium battery of the electric bicycle into a preset volt to power the system; A voltage collection module, wherein the voltage collection module is used to collect loop current; A display integrated module, the display integrated module is used to display the loop current collected in real time; DC-DC conversion module, voltage acquisition module, display integrated module; wherein the DC-DC conversion module is connected to the voltage acquisition module and the display integrated module respectively; the voltage acquisition module is connected to the display integrated module.

3. The device according to claim 2, characterized in that Also includes: A first terminal, a second terminal, a third terminal, and a fourth terminal; The first wiring terminal is a DC power supply positive electrode, and the first wiring terminal is connected to the output end of the switch device; The second wiring terminal is a negative electrode of a DC power supply, and the second wiring terminal is connected to the positive electrode of the shunt; The third wiring terminal is a positive electrode for current collection, and the third wiring terminal is connected to the first terminal of the shunt; The fourth wiring terminal is a negative electrode for current collection, and the fourth wiring terminal is connected to the second terminal of the shunt.

4. The device according to claim 2, characterized in that The DC-DC conversion module comprises: DC-DC converter.

5. The device according to claim 2, characterized in that The display integrated module includes: a digital display.

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