TWI721591B - Electric vehicle diagnostic method - Google Patents

Abstract

The present invention relates to an electric vehicle diagnostic method using in an electric vehicle diagnostic system which includes a controller unit, a meter unit, a battery pack, and a diagnostic connector for communicating a diagnostic tool. The electric vehicle diagnostic method of the present invention comprises the following steps: (A) the diagnostic tool is communicated with the diagnostic connector, sends a diagnostic command to the battery pack, and performs step (B); (B) the battery pack selects a specific battery unit as a communication battery unit, enters the diagnosis mode, and performs step (C); (C) in the diagnosis mode, the communication battery unit reads the content information of the plurality of battery units according to a read command instructed by the user, and returns to the diagnostic tool in the communication method, and performs step (D); and (D) the content information of the plurality of battery units displays through the diagnostic tool.

Description

Electric vehicle diagnosis method

The present invention relates to an electric vehicle diagnosis method, in particular to an electric vehicle diagnosis method suitable for a multi-battery electric vehicle system.

Most of the conventional electric vehicle systems are powered by a single main battery as the power supply for the entire vehicle system. Therefore, there is no need for the method of the present invention. However, because the current electric vehicles have requirements for speed or horsepower, there are The battery combination applied to two batteries or more than one battery is used as the power source application requirement of the whole vehicle.

However, a system with more than two batteries will have more than two sets of communication connectors. Although this design is intuitive, it also requires additional communication structures and extended wiring and space issues, which greatly increase production costs and structural volume. And it may not be efficient in signal contact and communication.

This is the reason for the inventor. Based on the spirit of active invention, he eagerly thought of a diagnosis method for electric vehicles that could solve the above-mentioned problems. After several studies and experiments, the invention was finally completed.

The main purpose of the present invention is to provide a diagnostic method for electric vehicles. With this diagnostic tool, the content information of each battery cell on a multi-battery system electric vehicle can be obtained according to different communication formats, such as battery voltage, current, fault information, etc. Content, when the whole vehicle is undergoing maintenance, you can quickly obtain the required information, grasp the perfect replacement and replacement timing, and effectively improve the convenience.

To achieve the above objective, the electric vehicle diagnosis method of the present invention is used in an electric vehicle diagnosis system. The electric vehicle diagnosis system includes a controller unit, an instrument unit, a battery pack, and a diagnosis connector. The battery pack includes a plurality of batteries. unit. The control unit, the instrument unit and the battery pack are respectively connected in parallel on a communication line, and the end of the communication line is connected to the diagnostic connector. The user can communicate with the diagnostic connector through a diagnostic tool to diagnose and observe the battery pack. The content information of multiple battery cells in the battery pack.

The electric vehicle diagnosis method of the present invention includes the following steps: (A) Connect the diagnostic tool to the diagnostic connector, send a diagnostic command to the battery pack, and execute step (B); (B) The battery pack selects a specific battery unit as a communication battery unit, enters the diagnosis mode, and executes step (C); (C) In the diagnosis mode, the communication battery unit reads the content information of the plurality of battery units according to one of the read commands instructed by the user, and sends it back to the diagnosis tool by communication, and executes step (D); and (D) Display the content information of multiple battery cells through the diagnostic tool.

With the above-mentioned design, the electric vehicle diagnosis method of the present invention can be applied to a multi-battery system, so that users can not only know the total power and the mileage, but also perform detailed diagnosis and communication for individual battery cells to ensure that each The battery cells can operate normally.

In the above step (B), the battery pack can refer to the serial numbers of multiple battery units as the basis for selecting communication battery units. In this way, if there is no special requirement, the largest or smallest serial number can be selected as the communication battery unit according to the size of the serial number of each battery unit, which reduces excessive determination procedures and improves diagnosis efficiency.

In the above step (B), the battery pack can be coded according to the physical I/O signal of each battery cell. If the physical code signal is the smallest, it can be used as the basis for the selection of the communication battery unit to reduce excessive determination procedures and improve diagnosis efficiency.

The read command in the above step (C) may include overall content information and individual content information of a plurality of battery cells. In this way, the present invention can capture the overall diagnostic information of the battery pack and the individual status of each battery cell, and provide the user with complete and detailed battery content information.

The communication between the above-mentioned diagnostic tool and the diagnostic connector can be used for data transmission via K-LINE or CAN bus. Thus, through the above-mentioned data transmission format, requests such as planning diagnosis commands, read selection sequence number commands, and read content commands can be issued simultaneously to obtain the content information of the battery unit.

The above-mentioned diagnostic tool may include a processor and a display. Therefore, the present invention needs to issue a diagnosis command through the processor and obtain the content information of the battery unit, and at the same time display the above content information through the display for the user's reference to complete the diagnosis.

The above diagnostic connector can be an on-board diagnostics (On-Board Diagnostics, OBD), which is a computer system used to monitor vehicle pollution and engine performance. The present invention uses the system for battery cell diagnostics to provide an integrated Ways of communication.

The above summary and the following detailed description are exemplary in nature to further illustrate the patent application scope of the present invention. The other objectives and advantages of the present invention will be described in the following description and drawings.

Please refer to FIG. 1, which is a system architecture diagram of an electric vehicle diagnostic system according to a preferred embodiment of the present invention. The figure shows an electric vehicle diagnostic system 1 including a controller unit 11, an instrument unit 12, a battery pack 13, and a diagnostic connector 14. The controller unit 11 is used to drive the motor device to drive the vehicle forward and backward, and can be communicatively connected to a communication line 15; the instrument unit 12 is used to display the driving related information of the entire vehicle, which is a TFT or LCD Displays a screen and can be communicatively connected to the communication line 15. The battery pack 13 usually includes one or more battery units. In this embodiment, it includes a first battery unit 131 and a second battery unit 132, which is based on According to different requirements, a series or parallel connection can be selected. If high voltage is required, the first battery unit 131 and the second battery unit 132 can be used in series. If high capacity is required, the first battery unit can be used. The battery unit 131 and the second battery unit 132 are used in parallel, and finally the battery pack 13 is communicatively connected to the communication line 15.

The end of the communication line 15 is connected to the diagnostic connector 14. In this embodiment, the diagnostic connector is an on-board diagnostic system (On-Board Diagnostics, OBD), which is used to monitor vehicle pollution and engine performance. In the computer system, in the present invention, the battery status information can be diagnosed synchronously, and a diagnostic tool 16 can be connected via the diagnostic connector 14 through wired or wireless communication. In this embodiment, the diagnostic tool 16 includes a processor 161 and A display 162 can be a computer device, a smart portable device or a multi-function processing system, and the diagnostic tool 16 and the diagnostic connector 14 communicate the planning and diagnostic commands issued by the diagnostic tool 16 through the K-LINE or CAN bus , Read the selection sequence number command and read the content command and other requirements to obtain the content information of the battery unit, and also transmit the content information of the battery pack 13 to the diagnostic tool 16, and finally display the above content information through the display 162 for the user's reference. Complete the diagnosis job.

Next, please refer to FIG. 2 and FIG. 3, which are respectively a schematic diagram of a communication diagram of command issuing and a communication diagram of content acquisition of an electric vehicle diagnostic system according to a preferred embodiment of the present invention. As shown in Figure 2, in this embodiment, the data transmitted between the above-mentioned diagnostic tool 16 and the diagnostic connector 14 uses 8 bytes as a basic packet unit each time, so the diagnostic commands (BYTE 0) can be issued synchronously in these 8 bytes. , Read selection sequence number command (BYTE 1) and read content command (BYTE 2) and other requirements. The diagnostic command allows the diagnostic tool 16 to inform the communication battery unit that communicates with the outside to enter the diagnostic mode from the normal working mode, so that the diagnostic information can be read, which facilitates the subsequent testing and maintenance of the battery. Among them, after entering the diagnosis mode, if the user wants to obtain the content information of each battery cell, he can issue the read selection serial number command through the diagnostic tool 16 to select the battery cell serial number to be diagnosed, and issue the read content command. A command is given to the communication battery unit for external communication, and the communication battery unit for external communication can transmit the battery information of the battery serial number to be read by the diagnostic tool 16 through the communication line 15 to the diagnostic tool 16 for display.

Then, the battery content information responded by the battery cell is shown in Figure 3. When the diagnostic tool 16 receives the battery representative serial number, it can know which battery cell content information the display 162 is to display, and the read content definition is based on The read content command responds to the corresponding read content definition. DATA 1~6 represent the data value defined by the read content, which can include the voltage, current, fault information, etc. of the battery unit. When the entire vehicle is repaired and maintained When the time, you can quickly obtain the required information, grasp the perfect replacement and replacement timing, and effectively improve the convenience.

Please refer to FIG. 4, which is a flowchart of an electric vehicle diagnosis method according to a preferred embodiment of the present invention. As shown in the figure, the user communicates with the diagnostic connector 14 through the diagnostic tool 16 to diagnose the battery pack 13, observe the content information of the first battery unit 131 and the second battery unit 132 in the battery pack 13, and diagnose the electric vehicle The method includes the following steps: (A) connect the diagnostic tool 16 to the diagnostic connector 14, and send a diagnostic command to the battery pack 13, and execute step (B); (B) the battery pack 13 selects a specific first battery unit 131 or As a communication battery unit, the second battery unit 132 enters the diagnosis mode and executes step (C). In this embodiment, referring to the size of the serial number of the battery units 131, 132 as the basis for selecting the communication battery unit, the serial number can be directly selected Choose the smaller one or choose the larger serial number, or use the I/O signal code of the physical signal as the basis for the selection of the communication battery unit to reduce excessive determination procedures and improve the diagnosis efficiency; (C) In the diagnosis mode, the communication The battery unit reads the content information of the first battery unit 131 and the second battery unit 132 according to a read command instructed by the user, and sends it back to the diagnostic tool 16 through communication, and executes step (D), in which, The read command includes overall content information and individual content information of the first battery unit 131 and the second battery unit 132; and (D) the content information of the first battery unit 131 and the second battery unit 132 is performed through the diagnostic tool 16 display.

The above-mentioned embodiments are merely examples for the convenience of description, and the scope of rights claimed in the present invention should be subject to the scope of the patent application, rather than being limited to the above-mentioned embodiments.

1: Electric vehicle diagnostic system 11: Controller unit 12: Instrument unit 13: battery pack 131: The first battery unit 132: second battery unit 14: Diagnostic connector 15: Communication line 16: Diagnostic tools 161: processor 162: Display A~D: Steps

FIG. 1 is a system architecture diagram of an electric vehicle diagnosis system according to a preferred embodiment of the present invention. Fig. 2 is a communication diagram of the command issuance of the electric vehicle diagnosis system of a preferred embodiment of the present invention. Fig. 3 is a schematic diagram of communication for obtaining content of an electric vehicle diagnostic system according to a preferred embodiment of the present invention. Fig. 4 is a flowchart of an electric vehicle diagnosis method according to a preferred embodiment of the present invention.

A~D: Steps

Claims (7)

An electric vehicle diagnosis method, the method is used in an electric vehicle diagnosis system, the electric vehicle diagnosis system includes a controller unit, an instrument unit, a battery pack and a diagnosis connector, the battery pack includes a plurality of battery units, the control The unit, the meter unit, and the battery pack are respectively connected in parallel to a communication line, and the end of the communication line is connected to the diagnostic connector. The user can communicate with the diagnostic connector through a diagnostic tool for the battery pack Perform diagnosis and observe the content information of the plurality of battery cells in the battery pack. The electric vehicle diagnosis method includes the following steps: (A) Connect the diagnostic tool to the diagnostic connector, send a diagnostic command to the battery pack, and execute step (B); (B) The battery pack selects the specific battery unit as a communication battery unit, enters the diagnostic mode, and executes step (C); (C) In the diagnosis mode, the communication battery unit reads the content information of the plurality of battery units according to a read command instructed by the user, and transmits it back to the diagnosis tool by communication, and executes step (D); as well as (D) Display the content information of the plurality of battery cells through the diagnostic tool. For example, the electric vehicle diagnosis method described in item 1 of the scope of the patent application, wherein the step (B) of the battery pack is performed with reference to the serial number of the plurality of battery cells as the basis for selecting the communication battery cell. For example, in the electric vehicle diagnosis method described in item 1 of the scope of patent application, in the step (B), the battery pack is coded by the I/O signal of the physical signal as the basis for the selection of the communication battery unit. For the electric vehicle diagnosis method described in item 1 of the scope of patent application, wherein the read command in the step (C) includes overall content information and individual content information of the plurality of battery cells. For example, in the electric vehicle diagnosis method described in item 1 of the scope of patent application, the communication method between the diagnostic tool and the diagnostic connector is data transmission via K-LINE or CAN bus. For the electric vehicle diagnosis method described in item 1 of the scope of patent application, the diagnosis tool includes a processor and a display. For example, the electric vehicle diagnosis method described in the first item of the scope of patent application, wherein the diagnostic connector is an on-board diagnostic system (On-Board Diagnostics, OBD).

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