Electric vehicle wire harness assembly port identification circuit

Abstract

The utility model relates to an electric vehicle wire harness assembly port identification circuit. An electric vehicle wire harness assembly port comprises a plurality of function port groups. Each functional port group comprises a plurality of functional ports; the identification circuit comprises a main control chip, a channel switching circuit and a position detection selection circuit. The channel switching circuit comprises at least one serial input and parallel output chip which is used for converting a serial input level signal into a parallel output level signal; the position detection selection circuit comprises at least one one-out-of-multiple chip; the one-out-of-multiple chip outputs a level signal of a selected position detection pin in the plurality of position detection pins from the position signal output pin according to a selection signal received by the channel selection pin. According to the embodiment of the utility model, wire harnesses of various vehicle types can be integrated and compatible, and the port function can be automatically judged only by plugging an assembly wire plug controller of an original vehicle.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuits, specifically to a port identification circuit for an electric vehicle wiring harness assembly. Background Technology

[0002] Due to the large number of electric vehicle manufacturers and the lack of unified standards for wiring harness assemblies and port function definitions, it is difficult to accurately and quickly adapt to corresponding controllers in the repair parts market. Furthermore, some manufacturers' instrument components and customized functions are no longer compatible with existing controllers. The inability of existing controllers to accurately and quickly identify the corresponding wiring harness assembly ports hinders on-site port matching for convenient repairs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model discloses a port identification circuit for electric vehicle wiring harness assembly.

[0004] The technical solution adopted in this utility model is as follows:

[0005] An electric vehicle wiring harness assembly port identification circuit, wherein the electric vehicle wiring harness assembly port includes multiple functional port groups; each functional port group includes multiple functional ports; the identification circuit includes a main control chip, a channel switching circuit, and a position detection and selection circuit.

[0006] The channel switching circuit includes at least one serial input parallel output chip for converting a serial input level signal into a parallel output level signal. The serial input parallel output chip includes a serial input pin and a parallel output pin. The serial input pin is connected to the data output pin of the main control chip. The parallel output pin outputs a parallel output signal as a selection signal.

[0007] The position detection and selection circuit includes at least one multiplexer chip; the multiplexer chip includes a channel selection pin, multiple position detection pins, and a position signal output pin; the parallel output pin is connected to the channel selection pin of the position detection and selection circuit; the multiple position detection pins are respectively connected to multiple functional ports; the position signal output pin is connected to the data input pin of the main control chip; the multiplexer chip outputs the level signal of the selected position detection pin from the position signal output pin according to the selection signal received by the channel selection pin.

[0008] A further technical solution is that the serial input parallel output chip also includes cascaded expansion pins; when there are multiple serial input parallel output chips, the cascaded expansion pin of one serial input parallel output chip is connected to the serial input pin of the next stage serial input parallel output chip.

[0009] A further technical solution is that the position detection and selection circuit includes an ignition lock position judgment circuit, a throttle and brake position selection circuit, and a Hall signal position selection circuit; the position detection pin of the ignition lock position judgment circuit is connected to the function port of the ignition lock position function port group; the position detection pin of the throttle and brake position selection circuit is connected to the function port of the throttle and brake position function port group; and the position detection pin of the Hall signal position selection circuit is connected to the function port of the Hall signal position function port group.

[0010] The further technical solution is that the ignition switch position determination circuit is an eight-to-one chip; the throttle and brake position selection circuit is a dual-channel four-to-one chip; and the Hall signal position selection circuit is a three-channel two-to-one chip.

[0011] A further technical solution is that the channel selection circuit is composed of a first chip, a second chip, and a third chip cascaded together; the first chip, the second chip, and the third chip are all model 74HC595; the fourteenth pin of the first chip is a serial data input pin, which is connected to the data output pin of the main control chip; the thirteenth pin of the first chip is an enable pin; the ninth pin of the first chip is used as a cascade expansion pin and connected to the serial data input pin of the second chip; the ninth pin of the second chip is used as a cascade expansion pin and connected to the serial data input pin of the third chip.

[0012] The further technical solution is as follows: the ignition lock position determination circuit includes a fourth chip, model CD4051; pins 9 to 11 of the fourth chip are channel selection pins; pins 1, 2, and 3 of the third chip are the first group of parallel output pins, connected to pins 9 to 11 of the fourth chip; pins 1, 5, 12 to 15 of the fourth chip are position detection pins, connected to the ignition lock position function port, used to detect the level of the ignition lock position function port; pin 3 of the fourth chip is the position signal output pin, connected to the first group of data input terminals of the main control chip.

[0013] The further technical solution is as follows: the throttle and brake position selection circuit includes a fifth chip, the model of which is CD4502; the ninth and tenth pins of the fifth chip are channel selection pins, the fifth and sixth pins of the third chip are the second set of parallel output pins, which are connected to the fifth and sixth pins of the fifth chip; the eleventh, twelfth, fourteenth, fifteenth, first, second, fourth and fifth pins of the fifth chip are all position detection pins, which are connected to the throttle and brake position function ports; the third and thirteenth pins of the fifth chip are position signal output pins, which are connected to the second set of data input terminals of the main control chip.

[0014] The further technical solution is as follows: the Hall signal position selection circuit includes a sixth chip, the model of which is CD4503; the ninth, tenth, and eleventh pins of the sixth chip are connected together as channel selection pins; the second pin of the second chip is the third set of parallel output pins, which are connected to the channel selection pins of the sixth chip; the twelfth, second, fifth, first, thirteenth, and third pins of the sixth chip are position detection pins, which are connected to the Hall signal position function port to detect the level of the Hall signal position function port; the sixth pin of the sixth chip serves as the position signal output pin, which is connected to the third set of data input terminals of the main control chip.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention, by setting up a channel selection circuit and a position detection circuit, can sequentially identify the level signals of functional ports. For different models of electric vehicles, the level signals of each functional port in a functional port group are different. Therefore, when the data input pin of the main control chip receives high and low level signals arranged in a specific order, it can compare these high and low level signals with the stored data to determine which model of electric vehicle the high and low level signals in the specific order belong to. Based on this, the electric vehicle model is identified, thus achieving the recognizability of functional ports with multiple different arrangements. Compatibility can be achieved through subsequent programming, which means that the same circuit can be quickly used to recognize and be compatible with different electric vehicle models at the repair site.

[0017] The embodiments of this utility model can integrate and be compatible with wiring harnesses of various vehicle models. Simply plug in the original vehicle's assembly wiring harness controller to automatically determine the port function. Attached Figure Description

[0018] Figure 1 This is a structural block diagram of the electric vehicle wiring harness assembly port identification circuit in an embodiment of this utility model.

[0019] Figure 2 This is a structural block diagram of another embodiment of the electric vehicle wiring harness assembly port identification circuit in this utility model.

[0020] Figure 3 This is a schematic diagram of the channel selection circuit in an embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of the ignition lock position determination circuit in an embodiment of this utility model.

[0022] Figure 5 This is a schematic diagram of the throttle and brake position selection circuit in an embodiment of this utility model.

[0023] Figure 6 This is a schematic diagram of the Hall signal position selection circuit in an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the main control chip in an embodiment of this utility model.

[0025] Figure 8 This is an example of a functional port for an electric vehicle, as shown in an embodiment of the present invention. Detailed Implementation

[0026] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0027] Figure 1 This is a structural block diagram of the electric vehicle wiring harness assembly port identification circuit in an embodiment of this utility model. (See diagram below.) Figure 1 As shown, the electric vehicle wiring harness assembly port identification circuit includes a main control chip 1, a channel selection circuit 2, and a position detection selection circuit 3.

[0028] Channel selection circuit 2 includes at least one serial input parallel output chip. The serial input parallel output chip receives test commands from the main control chip 1 and receives the serial input level signal output from the data output pin of the main control chip 1, then converts it into a parallel output level signal. The serial input parallel output chip includes a serial input pin and a parallel output pin. The serial input pin is connected to the data output pin of the main control chip 1. The parallel output pin outputs a parallel output signal as a selection signal. The parallel output pin is connected to the channel selection pin of position detection selection circuit 3. If there are multiple serial input parallel output chips, they are cascaded together, with the cascade extension pin of one serial input parallel output chip connected to the serial input pin of the next stage serial input parallel output chip.

[0029] The position detection and selection circuit 3 includes at least one multiplexer chip. The multiplexer chip includes a channel selection pin, multiple position detection pins, and a position signal output pin. Based on the selection signal received from the channel selection pin, the multiplexer chip selects the level signals from the multiple position detection pins and outputs them from the position signal output pin. The multiple position detection pins of the multiplexer chip are respectively connected to multiple function ports of the function port group 4. The position signal output pin of the position selection and detection circuit 3 is connected to the data input pin of the main control chip 1.

[0030] For different electric vehicle models, the level signals of each functional port in a functional port group 4 are different. These different level signals are used to transmit different control commands and information for this functional port group. The data output pin of the main control chip 1 sends a serial output selection signal to the serial input pin of the channel selection circuit 2. The parallel output pin of the channel selection circuit 2 outputs a selection signal to the channel selection pin of the position detection selection circuit 3, sequentially selecting multiple position detection pins of the position detection selection circuit 3, and correspondingly outputting the level signal at each position detection pin from the position signal output pin to the main control chip 1.

[0031] The data input pins of the main control chip 1 receive a series of high and low level signals arranged in a specific order. The main control chip 1 can compare these high and low level signals with the stored data to determine which type of electric vehicle's functional port this series of high and low level signals belongs to. Based on this, the electric vehicle model can be identified and judged. Furthermore, the function can be matched according to the electric vehicle model to implement a specific maintenance control process. This achieves the recognizability of functional ports with multiple different arrangements and can be made compatible through subsequent programming. In this way, the same circuit can be quickly used to recognize and be compatible with different electric vehicle models at the maintenance site.

[0032] Figure 2 This is a structural block diagram of another embodiment of the electric vehicle wiring harness assembly port identification circuit in this utility model. (See diagram below.) Figure 2 As shown, in practical use, to determine the model of an electric vehicle, it may be necessary to identify the level signals of multiple different functional port groups 4-1, 4-2, and 4-3. Multiple position detection selection circuits 3-1, 3-2, and 3-3 can be set up to perform judgments on these multiple functional port groups. When multiple position detection selection circuits 3-1, 3-2, and 3-3 are set up, the serial input parallel output chip in channel selection circuit 2 needs to be configured with multiple sets of parallel output pins to connect to the channel selection pins of each position detection selection circuit 3-1, 3-2, and 3-3, so as to independently select and output the level signal of the position detection pin of each position detection selection circuit.

[0033] Figure 3 This is a schematic diagram of the channel selection circuit in an embodiment of this utility model. Figure 3As shown, in this embodiment, the channel selection circuit is composed of three cascaded serial input / parallel output chips, wherein the first chip UA1, the second chip UB2, and the third chip UC1 are all model 74HC595. Of course, those skilled in the art will readily recognize that other models of serial input / parallel output chips can also be used to implement the function of this channel selection circuit, or one or more serial input / parallel output chips can be used as needed to implement the function of this channel selection circuit.

[0034] exist Figure 3 In this configuration, pin 14 of the first chip UA1 is the serial data input pin, connected to the data output pin of the main control chip. Pin 13 of the first chip UA1 is the enable pin. Pin 12 of the first chip UA1 is the storage register clock input pin; upon receiving a rising edge signal, the received data is transferred from the shift register to the storage register. Pin 11 of the first chip UA1 is the shift register clock pin; upon receiving a rising edge signal, the data in the shift register is shifted forward, and the new byte is received. Pin 9 of the first chip UA1 is used as a cascade expansion pin, connected to the serial data input pin of the second chip UB1. Pin 9 of the second chip UB1 is also used as a cascade expansion pin, connected to the serial data input pin of the third chip UC1.

[0035] Pins 1 to 7 of the first chip UA1, pins 1 to 7 of the second chip UB1, and pins 1 to 7 of the third chip UC1 can all be used as parallel data output pins for connecting to the position detection and selection circuit. Furthermore, those skilled in the art will readily understand that if more input ports for the position detection and selection circuit are needed, the number of cascaded serial-input parallel-output chips in the channel selection circuit can be increased. Figure 4 In the illustrated embodiment, the second pin of the second chip UB1 and the first, second, third, fifth, and sixth pins of the third chip UC1 are used as parallel data output pins. Other pins are used for other purposes in this embodiment and are not related to the implementation process of the technical solution in this embodiment, so they will not be described further.

[0036] In this embodiment, to efficiently detect the electric vehicle model, three functional port groups were selected based on the actual situation: the ignition lock position functional port group, the throttle and brake position functional port group, and the Hall signal position functional port group. Accordingly, three position detection and selection circuits were also configured: an ignition lock position judgment circuit, a throttle and brake position selection circuit, and a Hall signal position selection circuit.

[0037] Figure 4 This is a schematic diagram of the ignition lock position determination circuit in an embodiment of this utility model. Figure 4As shown, the ignition lock position determination circuit includes a fourth chip U5, which is an 8-to-1 multiplexer chip. In this embodiment, the specific model of the fourth chip U5 is CD4051. Of course, those skilled in the art will readily know that other models of multiplexers can also be used to implement the function of this ignition lock position determination circuit.

[0038] Pins 9 to 11 of the fourth chip U5 are channel selection pins, combined with... Figure 3 The first, second, and third pins of the third chip UC1 are the first group of parallel output pins, which are connected to the eleventh, tenth, and ninth pins of the fourth chip U5, respectively.

[0039] Pins 1, 5, and 12 through 15 of the fourth chip U5 serve as position detection pins, all connected to the ignition lock position function ports to detect the voltage levels of the six ignition lock position function ports. Pin 3 of the fourth chip U5 serves as a position signal output pin, connected to the first set of data inputs of the main control chip. When the channel selection pin of the fourth chip U5 receives a voltage level signal, it selects the voltage level of a specific position detection pin based on the received signal and outputs the position signal output pin to the main control chip.

[0040] Figure 5 This is a schematic diagram of the throttle and brake position selection circuit in an embodiment of this utility model. Figure 5 As shown, the throttle and brake position selection circuit includes a fifth chip U6, which is a dual-channel 4-to-1 multiplexer chip. In this embodiment, the specific model is CD4502. Of course, those skilled in the art will readily know that other models of 4-to-1 multiplexers can also be used to implement the function of this throttle and brake position selection circuit.

[0041] The ninth and tenth pins of the fifth chip U6 are channel selection pins, combined with Figure 3 The fifth and sixth pins of the third chip UC1 are the second set of parallel output pins, which are connected to the fifth and sixth pins of the fifth chip U6, respectively.

[0042] The fifth chip U6 has four groups of pins: pins 11 and 12 form one group, pins 14 and 15 form another, pins 1 and 2 form a third group, and pins 4 and 5 form a fourth group. These groups are used for position detection, corresponding to four brake positions and four throttle positions, and are connected to the throttle and brake position function ports to detect their voltage levels. Pins 3 and 13 of the fifth chip U6 serve as position signal output pins, connected to the second set of data input terminals of the main control chip.

[0043] Figure 6This is a schematic diagram of the Hall signal position selection circuit in an embodiment of this utility model. Figure 6 As shown, the Hall signal position selection circuit includes a sixth chip U4, which is a three-way two-to-one multiplexer chip. In this embodiment, the specific model is CD4503. Of course, those skilled in the art will readily know that other models of multiplexers can also be used to implement the function of this Hall signal position selection circuit.

[0044] Pins 9, 10, and 11 of the sixth chip U4 are connected together to form the channel selection pin, combined with... Figure 3 The second pin of the second chip UB1 is the third set of parallel output pins, which are connected to the channel selection pin of the sixth chip U4.

[0045] The twelfth, second, and fifth pins of the sixth chip U4 form one group, and the first, thirteenth, and third pins form another group. There are two groups of pins used as position detection pins, corresponding to the positions of the two Hall signal positions respectively. They are connected to the Hall signal position function port to detect the level of the Hall signal position function port. The sixth pin of the sixth chip U4 is used as the position signal output pin and is connected to the third group of data input terminals of the main control chip.

[0046] Figure 7 This is a schematic diagram of the main control chip in an embodiment of this utility model. Figure 7 One optional model of the main control chip U3, MM32SPIN0280, is provided. The function of the main control chip U3 is to send a serial detection signal, receive signals from each position detection and selection circuit regarding the position detection of the functional ports, and compare and determine which electric vehicle's functional port the sequentially ordered level signals belong to. Therefore, the main control chip U3 only needs to have the function of sending high and low level signals from the data output pins through programming, and the function of receiving high and low level signals from the data input pins. The specific data input and data output pins can be specified through programming using the chip's general-purpose input / output interface. Those skilled in the art can also use other models of chips as the main control chip to implement the functions of this invention. As for the internal program of the main control chip for judging high and low levels, it does not involve a complex programming process and can be implemented by those skilled in the art based on existing technology; it is not within the scope of protection of this invention and will not be described further.

[0047] Figure 8 This is an example of a functional port for an electric vehicle, as shown in an embodiment of the present invention. Figure 8The diagram shows the function ports of five different electric vehicle models BLY1 to BLY5. JP4×2 are the throttle and brake position function ports, JP3×2 are the Hall signal position function ports, and JP8×2 are the ignition lock position function ports. It can be seen that even within the same set of function ports, the order of the voltage levels on each port differs for the five different models. Therefore, by determining the voltage level sequence of the function ports, the electric vehicle model can be identified. Subsequent programming can then be used to match the corresponding electric vehicle control and maintenance functions, achieving recognition and compatibility with different electric vehicle models. Figure 8 The illustration shows an optional implementation. The meaning and function of each port can be defined by those skilled in the art at the electric vehicle manufacturer as needed. The specific definition and meaning are not within the scope of protection of this utility model. Even if defined as other level combinations, it will not affect the circuit structure and operation of this utility model.

[0048] Taking the ignition lock position function port of JP8×2 as an example, select function port 1 in the JP8×2 table and connect it to pin 13 of the fourth chip U5. The first to third pins of the third chip UC1 in the channel selection circuit output a level signal of 000 to the channel selection pin of the fourth chip U5. At this time, the position signal output terminal outputs a high level VCC for function port 1. Therefore, it can be directly determined that the electric vehicle model is BLY4, because according to... Figure 8 In the JP8×2 table shown, only the BLY4 model has a VCC high level in function port 1.

[0049] If a signal duplication occurs at a certain function port, for example, in the JP4×2 table, both BLY1 and BLY3 electric vehicles show a high-level signal VCC at function port 5, you can continue to combine other signals for judgment. For example, you can use the channel selection circuit to select the level signal of output port 7. Between BLY1 and BLY3 models, the level signal output by function port 7 of BLY1 is SD, approximately 0.8V, which is different from the level signal of function port 7 of BLY3. Therefore, you can further distinguish between BLY1 and BLY3 models based on the level of function port 7.

[0050] Of course, the specific programming and operation methods for model identification are not the subject of this invention. Those skilled in the art can identify and identify the functional port information of multiple known electric vehicles based on the actual level of the functional ports of different electric vehicle models, using the circuit provided in this invention embodiment, the high and low level identification methods in the prior art, and simple logic processing. Then, based on the functional port information, the corresponding electric vehicle model can be determined, and the necessary maintenance and testing of specific electric vehicle models can be performed using the prior art. This achieves compatibility of the wiring ports of different electric vehicle models.

[0051] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. The present utility model can be modified in any form without departing from its basic structure.

Claims

1. A port identification circuit for an electric vehicle wiring harness assembly, characterized in that, The electric vehicle wiring harness assembly port includes multiple functional port groups; each functional port group includes multiple functional ports; the identification circuit includes a main control chip, a channel switching circuit, and a position detection and selection circuit. The channel switching circuit includes at least one serial input parallel output chip for converting serial input level signals into parallel output level signals. A serial input parallel output chip includes serial input pins and parallel output pins; The serial input pin connects to the data output pin of the main control chip; the parallel output pin outputs a parallel output signal as a selection signal. The position detection and selection circuit includes at least one multiplexer chip; the multiplexer chip includes a channel selection pin, multiple position detection pins, and a position signal output pin; the parallel output pin is connected to the channel selection pin of the position detection and selection circuit; the multiple position detection pins are respectively connected to multiple functional ports; the position signal output pin is connected to the data input pin of the main control chip; the multiplexer chip outputs the level signal of the selected position detection pin from the position signal output pin according to the selection signal received by the channel selection pin.

2. The electric vehicle wiring harness assembly port identification circuit according to claim 1, characterized in that, The serial input parallel output chip also includes cascaded expansion pins; when there are multiple serial input parallel output chips, the cascaded expansion pins of one serial input parallel output chip are connected to the serial input pins of the next stage serial input parallel output chip.

3. The electric vehicle wiring harness assembly port identification circuit according to claim 1, characterized in that, The position detection and selection circuit includes an ignition lock position judgment circuit, a throttle and brake position selection circuit, and a Hall signal position selection circuit; the position detection pin of the ignition lock position judgment circuit is connected to the function port of the ignition lock position function port group; the position detection pin of the throttle and brake position selection circuit is connected to the function port of the throttle and brake position function port group; and the position detection pin of the Hall signal position selection circuit is connected to the function port of the Hall signal position function port group.

4. The electric vehicle wiring harness assembly port identification circuit according to claim 3, characterized in that, The ignition switch position selection circuit is an 8-to-1 chip; the throttle and brake position selection circuit is a dual-channel 4-to-1 chip; and the Hall signal position selection circuit is a 3-channel 2-to-1 chip.

5. The electric vehicle wiring harness assembly port identification circuit according to claim 3, characterized in that, The channel selection circuit is composed of a first chip, a second chip, and a third chip cascaded together; the first chip, the second chip, and the third chip are all model 74HC595; the fourteenth pin of the first chip is a serial data input pin, which is connected to the data output pin of the main control chip; the thirteenth pin of the first chip is an enable pin; the ninth pin of the first chip is used as a cascade expansion pin and connected to the serial data input pin of the second chip; the ninth pin of the second chip is used as a cascade expansion pin and connected to the serial data input pin of the third chip.

6. The electric vehicle wiring harness assembly port identification circuit according to claim 5, characterized in that, The ignition switch position determination circuit includes a fourth chip, model CD4051. Pins 9 to 11 of the fourth chip are channel selection pins. Pins 1, 2, and 3 of the third chip are the first set of parallel output pins, connected to pins 9 to 11 of the fourth chip. Pins 1, 5, and 12 to 15 of the fourth chip are used as position detection pins, connected to the ignition switch position function port, to detect the level of the ignition switch position function port. Pin 3 of the fourth chip is used as a position signal output pin, connected to the first set of data input terminals of the main control chip.

7. The electric vehicle wiring harness assembly port identification circuit according to claim 5, characterized in that, The throttle and brake position selection circuit includes a fifth chip, model CD4502; pins 9 and 10 of the fifth chip are channel selection pins, pins 5 and 6 of the third chip are the second set of parallel output pins, connected to pins 5 and 6 of the fifth chip; pins 11, 12, 14, 15, 1, 2, 4, and 5 of the fifth chip are all position detection pins, connected to the throttle and brake position function ports; pins 3 and 13 of the fifth chip are position signal output pins, connected to the second set of data input terminals of the main control chip.

8. The electric vehicle wiring harness assembly port identification circuit according to claim 5, characterized in that, The Hall signal position selection circuit includes a sixth chip, model CD4503; pins 9, 10, and 11 of the sixth chip are connected together as channel selection pins; pin 2 of the second chip is the third set of parallel output pins, which are connected to the channel selection pins of the sixth chip; pins 12, 2, 5, 1, 13, and 3 of the sixth chip are position detection pins, connected to the Hall signal position function port, used to detect the level of the Hall signal position function port; pin 6 of the sixth chip serves as the position signal output pin, connected to the third set of data input terminals of the main control chip.

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