A safe method for CAN testing of new energy vehicles

Abstract

This invention proposes a safe method for testing the CAN bus (CAN) of new energy vehicles, comprising the following steps: first, plugging a motor controller into a new energy vehicle; second, connecting the new energy vehicle to a host computer; and third, testing the new energy vehicle. The invention can collect information such as motor speed, temperature, current, and power during operation.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a safety method for CAN testing of new energy vehicles. Background Art

[0002] The design and assembly of the structural parts of the motor controller is one of the important indicators related to the sealing performance of the product, and is also an important indicator for customers to purchase. At present, the fastening of the face shell and the bottom shell is completely fastened by glue, but because the bottom of the face shell is directly in contact with the horizontal panel of the bottom shell, and the contact surface is flat and smooth, it can only be fixed and limited by glue. After a long time of use, the back shell and the bottom shell are prone to separation, resulting in the product cannot be used normally. When the outer shell adopts a square structure, it is easy to distinguish between front, back, left and right, and it is easy to make mistakes in the alignment of the face shell when press-fitting the face shell and the bottom shell, resulting in press-fitting failure. Summary of the Invention

[0003] The present invention aims to at least solve the technical problems existing in the prior art, and in particular innovatively proposes a new energy vehicle CAN test safety method.

[0004] In order to achieve the above-mentioned object of the present invention, the present invention provides a new energy vehicle CAN test safety method, comprising the following steps:

[0005] The first step is to plug the motor controller into the new energy vehicle;

[0006] The second step is to connect the new energy vehicle to the host computer;

[0007] The third step is to test new energy vehicles.

[0008] In a preferred embodiment of the present invention, the motor controller includes a face shell, a PCB board, and a bottom shell arranged in sequence from top to bottom, an annular groove for inserting the bottom of the face shell is provided in the bottom shell, sealant is applied in the annular groove, and a knurled structure for increasing the bonding area is provided on the bottom surface of the face shell. A limiting protrusion is horizontally provided on the outer side of the face shell, and a positioning notch is provided on the outer side of the annular groove for the limiting protrusion to be pressed down and inserted. When the face shell with the PCB board installed is pressed down onto the bottom shell from top to bottom, the bottom of the face shell is inserted into the annular groove, and the limiting protrusion is synchronously inserted into the positioning notch.

[0009] The motor controller provided by the present invention has an outer shell that is tightly installed and accurately installed, thereby solving the problems of poor bonding stability caused by smooth contact surfaces between the top shell and the bottom shell, and press-fitting failure caused by inaccurate positioning of the square shell.

[0010] In a preferred embodiment of the present invention, a CAN communication module, an ECU controller and a data security module are provided on the PCB board;

[0011] The data communication terminal of the CAN communication module is connected to the CAN data communication terminal of the ECU controller, and the data terminal of the ECU controller is connected to the data terminal of the data security module;

[0012] The CAN communication module is used to receive data sent by the electronic control unit ECU of the new energy vehicle, and the received data is securely processed by the data security module to obtain test data.

[0013] In a preferred embodiment of the present invention, two limiting protrusions are used, and they are asymmetrically located on the outer edge of the face shell. The asymmetrical structure can effectively prevent the face shell from being installed upside down. The employees on the production line can intuitively judge the installation direction of the upper shell based on the limiting protrusions of the face shell, avoiding repeated operations and unnecessary damage to the PCB board. The design concept is reasonable.

[0014] In a preferred embodiment of the present invention, the bottom shell is provided with mounting supports extending outwardly in a bilaterally symmetrical manner. The mounting supports are provided with mounting holes, and the structural design is reasonable, which facilitates the installation of the installed electronic control unit on the device.

[0015] In a preferred embodiment of the present invention, the PCB board is installed in the face shell by welding, the welding is firm, and the face shell as a whole has a square structure and a reasonable shape.

[0016] In a preferred embodiment of the present invention, the sealant is in paste form, which is convenient for extrusion and diffusion to increase the bonding contact surface, thereby ensuring a sealing effect.

[0017] In a preferred embodiment of the present invention, the limiting protrusion is flush with the bottom surface of the face shell and is provided with a knurled structure, the bottom surface of the positioning notch is flush with the bottom of the annular groove, and the thickness of the limiting protrusion is less than the height of the positioning notch, ensuring that the limiting protrusion will not be exposed after being placed in the positioning notch, thereby ensuring an aesthetically pleasing appearance.

[0018] In a preferred embodiment of the present invention, the surface roughness of the annular groove is 6.3-25, which ensures that the adhesive contact surface of the sealant is large and the adhesive strength is high.

[0019] In summary, due to the adoption of the above technical solution, the present invention can:

[0020] (1) The present invention can collect the motor speed, motor temperature, current, power, etc. when the motor is working.

[0021] (2) Compared with the smooth contact surface between the top shell and the bottom shell, this solution adopts an annular groove set in the bottom shell for the bottom of the top shell to be inserted, and at the same time a knurled structure is set on the bottom surface of the top shell. The annular groove realizes preliminary positioning, and sealant is applied in the annular groove to effectively ensure the contact between the sealant and the knurled structure. Moreover, since the knurled structure can increase the bonding surface, the adhesion between the top shell and the bottom shell is strong. The design is ingenious and the structure is linked together.

[0022] (3) A limiting protrusion is provided horizontally on the outside of the face shell, and a positioning notch is provided on the outer side of the annular groove for the limiting protrusion to be pressed down and placed. Since the face shell with the PCB board is pressed down and installed on the bottom shell, the staff can effectively judge the orientation of the face shell through the limiting protrusion, especially when the outer shell is square in shape, which effectively avoids the staff from misjudging the installation and repeating the operation, resulting in unnecessary damage to the PCB board, and realizes accurate press installation.

[0023] In summary, it has the advantages of strong adhesion between the top shell and the bottom shell, ingenious design, interlocking structure, and precise pressing.

[0024] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0026] Figure 1 It is a schematic flowchart of the invention.

[0027] Figure 2 It is a structural diagram of the invention.

[0028] Figure 3 It is an exploded diagram of the parts of the invention.

[0029] Figure 4 It is a structural diagram of the bottom shell of the invention.

[0030] Figure 5 It is a structural schematic diagram of the invented face shell. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] The present invention provides a new energy vehicle CAN test safety method, such as Figure 1 As shown, the following steps are included:

[0033] The first step is to plug the motor controller into the new energy vehicle;

[0034] The second step is to connect the new energy vehicle to the host computer;

[0035] The third step is to test new energy vehicles.

[0036] like Figures 2 to 5 As shown, the motor controller consists of a front shell 1, a PCB board 2, and a bottom shell 3 arranged in sequence from top to bottom.

[0037] PCB board 2 is equipped with a CAN communication module, an ECU controller, and a data security module. A temperature sensor can also be installed on PCB board 2 to measure temperature parameters within the motor controller. The number of temperature sensors is set according to actual conditions. Preferably, one temperature sensor is installed on the back side of the ECU controller to monitor the temperature of the ECU controller.

[0038] The temperature data terminal of the temperature sensor is connected to the temperature data terminal of the ECU controller;

[0039] The data communication terminal of the CAN communication module is connected to the CAN data communication terminal of the ECU controller, and the data terminal of the ECU controller is connected to the data terminal of the data security module;

[0040] The CAN communication module is used to receive data sent by the electronic control unit ECU of the new energy vehicle, and the received data is securely processed by the data security module to obtain test data.

[0041] The face shell 1 is in a square structure as a whole.

[0042] The PCB board 2 is preferably installed in the housing 1 by welding.

[0043] An annular groove 31 is provided in the bottom shell 3 for the bottom of the surface shell 1 to be inserted.

[0044] The inner surface roughness of the annular groove 31 is 6.3-25.

[0045] The bottom surface of the housing 1 is provided with a knurled structure 11 to increase the adhesive bonding area.

[0046] A limiting protrusion 12 is horizontally provided on the outer side of the surface shell 1.

[0047] Preferably, two limiting protrusions 12 are used, and they are asymmetrically located on the outer edge of the face shell 1 .

[0048] Sealant 311 is dotted inside the annular groove 31 .

[0049] A positioning notch 32 is provided on the outer side of the annular groove 31 for the limiting protrusion 12 to be pressed down and placed.

[0050] Since the front cover with the PCB board is pressed down and installed on the bottom cover, the staff can effectively judge the position of the front cover through the limiting protrusion, especially when the outer cover is square in shape, which effectively avoids the staff from misjudging and installing it incorrectly and repeating the operation.

[0051] The limiting protrusion 12 is flush with the bottom surface of the face shell 1 and is provided with a knurling structure. The bottom surface of the positioning notch 32 is flush with the bottom of the annular groove 31 . The thickness of the limiting protrusion 12 is less than the height of the positioning notch 32 .

[0052] The bottom shell 3 is symmetrically provided with mounting supports 33 extending outward.

[0053] The mounting bracket 33 is provided with a mounting hole.

[0054] The sealant 311 is preferably a paste-like glue.

[0055] When the front shell 1 with the PCB board 2 installed is pressed downward onto the bottom shell 3, the bottom of the front shell 1 is inserted into the annular groove 31, and the limiting protrusion 12 is simultaneously placed into the positioning notch 32.

[0056] First, weld the PCB board 2 and the face shell 1 together, apply sealant 311 in the annular groove 31, and press the PCB board 2 and the face shell 1 onto the bottom shell 3 filled with sealant 311 according to the limiting protrusions 12 and positioning notches 32 of the face shell 1 and the bottom shell 3.

[0057] The following measures are adopted: a knurled structure 11 is provided at the bonding point of the face shell 1 to increase the bonding area of ​​the sealant 311 to ensure that the face shell 1 and the bottom shell 3 are securely fastened; the surface roughness of the annular groove 31 of the bottom shell 3 is increased to ensure that the face shell 1 and the bottom shell 3 are securely fastened; limiting protrusions 12 and positioning notches 32 are added to the face shell 1 and the bottom shell 3 to ensure that the shells are installed correctly in the correct direction.

[0058] In a preferred embodiment of the present invention, the third step includes the following steps:

[0059] S1, the new energy vehicle electronic control unit ECU obtains the test code and test data sent by the host computer (laptop or PC);

[0060] S2, the new energy vehicle electronic control unit ECU converts the test data obtained in step S1 into binary test data;

[0061] S3, the new energy vehicle electronic control unit ECU converts the test code obtained in step S1 into a binary test code;

[0062] S4, the new energy vehicle electronic control unit ECU determines the relationship between P and Q:

[0063] If P > Q, where P is the number of characters of the binary test data and Q is the number of characters of the binary test code, then add q zeros or ones after the binary test code; perform the next step;

[0064] If P < Q, where P is the number of characters of the binary test data and Q is the number of characters of the binary test code, then reduce the number of bits by p after the binary test code; perform the next step;

[0065] If P = Q, where P is the number of characters of the binary test data and Q is the number of characters of the binary test code, then perform the next step;

[0066] Make the number of characters of P and Q the same through step S4;

[0067] S5. Perform bit-by-bit calculation on the binary test data after step S4 and the binary test code to obtain vehicle test data; this vehicle test data is motor test data, including motor speed, motor temperature, current, power, etc.

[0068] S6. Send the vehicle test data to the motor controller through CAN communication for testing. During the test, collect data such as motor speed, motor temperature, current, power, etc. When not testing, the parameters to be collected are uncertain, ensuring the security of the collected parameters.

[0069] In a preferred embodiment of the present invention, step S4 is as follows:

[0070] The new energy vehicle electronic control unit ECU judges the size relationship between P and Q:

[0071] If P > Q, where P is the number of characters of the binary test data and Q is the number of characters of the binary test code, then add q zeros after the binary test code; perform the next step;

[0072] If P < Q, where P is the number of characters of the binary test data and Q is the number of characters of the binary test code, then reduce the number of bits by p after the binary test code; perform the next step;

[0073] If P = Q, where P is the number of characters of the binary test data and Q is the number of characters of the binary test code, then perform the next step.

[0074] In a preferred embodiment of the present invention, the calculation method of q in step S4 is:

[0075] q = P - Q,

[0076] where q is the number of added ones;

[0077] P represents the number of characters of the binary test data;

[0078] Q represents the number of character bits in the binary test code.

[0079] In a preferred embodiment of the present invention, the calculation method of p in step S4 is:

[0080] p=QP,

[0081] Among them, p represents the number of reductions;

[0082] P represents the number of characters in the binary test data;

[0083] Q represents the number of character bits in the binary test code.

[0084] In a preferred embodiment of the present invention, in step S5, the binary test data obtained in step S4 is subjected to parity calculation with the binary test code to obtain vehicle test data in the following manner:

[0085] P1P2P3…P J ⊙Q1Q2Q3…Q J =P1′P2′P3′…P J ′,

[0086] Wherein, P1 represents the value at the first position from left to right in the binary test data;

[0087] P2 represents the value at the second position from left to right in the binary test data;

[0088] P3 represents the value at the third position from left to right in the binary test data;

[0089] P J Indicates the value at the Jth position from left to right in the binary test data;

[0090] Q1 represents the value of the first bit from left to right in the binary test code;

[0091] Q2 represents the value of the second bit from left to right in the binary test code;

[0092] Q3 represents the value of the third bit from left to right in the binary test code;

[0093] Q J Indicates the value at the Jth position from left to right in the binary test code;

[0094] P1′ represents the first value from left to right in the vehicle test data;

[0095] P2′ represents the second value from left to right in the vehicle test data;

[0096] P3′ represents the third value from left to right in the vehicle test data; P J ′ represents the value at the Jth position from left to right in the vehicle test data;

[0097] ⊙ represents the same position operator;

[0098] J represents the total number of digits;

[0099] P1P2P3…P J Represents binary test data;

[0100] Q1Q2Q3…Q J represents a binary test code;

[0101] P1′P2′P3′…P J ′ represents vehicle test data.

[0102] In a preferred embodiment of the present invention, P j The calculation method of ′ is:

[0103]

[0104] Among them, P j ' represents the value at the jth position from left to right in the test data to be sent; if represents the logical condition if;

[0105] P j Represents the value at the jth position from left to right in the binary test data;

[0106] Q j Indicates the value at the jth position from left to right in the binary test code;

[0107] or indicates logical condition or;

[0108] and represents the logical condition and;

[0109] J represents the total number of digits.

[0110] In a preferred embodiment of the present invention, step S5 further includes calculating the vehicle code corresponding to the vehicle test data and determining whether the binary vehicle code is consistent with the binary test code:

[0111] If the binary vehicle code is consistent with the binary test code, the vehicle test data is correct vehicle test data;

[0112] If the binary vehicle code is inconsistent with the binary test code, the vehicle test data is erroneous vehicle test data.

[0113] In a preferred embodiment of the present invention, the method for calculating the vehicle code corresponding to the vehicle test data is:

[0114] Cardatastring = Datastringenerateway(Cartestcode),

[0115] where Cardatastring represents the vehicle code calculated based on vehicle test data;

[0116] Datastringenerateway() represents the calculation method of the vehicle code, and the sha256 digest algorithm can be used;

[0117] Cartestcode represents vehicle test data.

[0118] In a preferred embodiment of the present invention, in step S1, the method for generating test data includes the following steps:

[0119] S11, obtain the test data to be sent; the test data to be sent is motor test data, including motor speed, motor temperature, current, power, etc.

[0120] S12, convert the test data obtained in step S11 into binary test data, and generate a test code for the test data according to the binary test data;

[0121] S13, convert the test code in step S12 into a binary test code;

[0122] S14, judge the size relationship between U and V:

[0123] If U > V, where U is the number of characters of the binary test data and V is the number of characters of the binary test code, then add v 0s or 1s after the binary test code; execute the next step;

[0124] If U < V, where U is the number of characters of the binary test data and V is the number of characters of the binary test code, then reduce u bits after the binary test code; execute the next step;

[0125] If U = V, where U is the number of characters of the binary test data and V is the number of characters of the binary test code, then execute the next step;

[0126] Make the number of characters of U and V the same through step S14;

[0127] S15, perform a bit-by-bit calculation on the binary test data and the binary test code after step S14 to obtain the actual test data to be sent;

[0128] S16, send the test code and the actual test data to be sent to the test vehicle using the host computer.

[0129] In a preferred embodiment of the present invention, step S14 is as follows:

[0130] Judge the size relationship between U and V:

[0131] If U > V, where U is the number of characters of the binary test data and V is the number of characters of the binary test code, then add v zeros after the binary test code; execute the next step;

[0132] If U < V, where U is the number of characters of the binary test data and V is the number of characters of the binary test code, then reduce u bits after the binary test code; execute the next step;

[0133] If U = V, where U is the number of characters of the binary test data and V is the number of characters of the binary test code, then execute the next step;

[0134] Make the number of characters of U and V the same through step S14.

[0135] In a preferred embodiment of the present invention, the calculation method of v in step S14 is as follows:

[0136] v = U - V,

[0137] where v is the number of added ones;

[0138] U represents the number of characters of the binary test data;

[0139] V represents the number of characters of the binary test code.

[0140] In a preferred embodiment of the present invention, the calculation method of u in step S14 is as follows:

[0141] u = V - U,

[0142] where u represents the number of reduced ones;

[0143] U represents the number of characters of the binary test data;

[0144] V represents the number of characters of the binary test code.

[0145] In a preferred embodiment of the present invention, in step S15, the method of performing a bit-by-bit calculation on the binary test data after step S14 and the binary test code to obtain the actual test data to be sent is as follows:

[0146] U1U2U3…U K ⊙V1V2V3…V K =U1′U2′U3′…U′ K ,

[0147] where U1 represents the value at the 1st position from left to right in the binary test data;

[0148] U2 represents the value at the second position from left to right in the binary test data;

[0149] U3 represents the value at the third position from left to right in the binary test data;

[0150] U K Indicates the value at the Kth position from left to right in the binary test data;

[0151] V1 represents the value of the first bit from left to right in the binary test code;

[0152] V2 represents the value of the second bit from left to right in the binary test code;

[0153] V3 represents the value of the third bit from left to right in the binary test code;

[0154] V K Indicates the value at the Kth position from left to right in the binary test code;

[0155] U1′ represents the value of the first bit from left to right in the actual test data to be sent;

[0156] U2′ represents the value of the second bit from left to right in the actual test data to be sent;

[0157] U3′ represents the value of the third bit from left to right in the actual test data to be sent;

[0158] U′ K Indicates the value at the Kth position from left to right in the actual test data to be sent;

[0159] ⊙ represents the same position operator;

[0160] K represents the total number of digits;

[0161] U1U2U3…U K Represents binary test data;

[0162] V1V2V3…V K represents a binary test code;

[0163] U1′U2′U3′…U′ K Indicates the actual test data to be sent;

[0164] U k The calculation method of ′ is:

[0165]

[0166] Among them, U k' represents the value at the kth position from left to right in the actual test data to be sent;

[0167] If means logical condition if;

[0168] U k Represents the value at the kth position from left to right in the binary test data;

[0169] V k Indicates the value at the kth position from left to right in the binary test code;

[0170] or indicates logical condition or;

[0171] and represents the logical condition and;

[0172] K represents the total number of digits.

[0173] In a preferred embodiment of the present invention, the method for generating a test code of the test data according to the binary test data in step S12 is:

[0174] Testingstring=Testingstringenerateway(Testdata),

[0175] Among them, Testingstring represents the test code generated according to the obtained test data;

[0176] Testingstringenerateway() indicates the method of generating the test code, which can use the sha256 digest algorithm;

[0177] Testdata means obtaining the test data to be tested.

[0178] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A new energy vehicle CAN test safety method, characterized in that: It includes the following steps: In the first step, plug the motor controller onto the new energy vehicle; In the second step, connect the new energy vehicle to the host computer; In the third step, the new energy vehicle is tested; the third step includes the following steps: S1, the electronic control unit ECU of the new energy vehicle obtains the test code and test data sent by the host computer; S2, the electronic control unit ECU of the new energy vehicle converts the test data obtained in step S1 into binary test data; S3, the electronic control unit ECU of the new energy vehicle converts the test code obtained in step S1 into binary test code; S4, the electronic control unit ECU of the new energy vehicle judges the size relationship between P and Q: If P>Q, where P is the number of characters of the binary test data and Q is the number of characters of the binary test code, then add q 0s or 1s after the binary test code; execute the next step; If P<Q, where P is the number of characters of the binary test data and Q is the number of characters of the binary test code, then reduce p bits after the binary test code; execute the next step; If P = Q, where P is the number of characters of the binary test data and Q is the number of characters of the binary test code, then execute the next step; Make the number of characters of P and Q consistent through step S4; S5, perform a bit-by-bit calculation on the binary test data and the binary test code after step S4 to obtain vehicle test data; S6, send the vehicle test data to the motor controller through CAN communication for testing; The motor controller includes a front shell (1), a PCB board (2), and a bottom shell (3) arranged in sequence from top to bottom. A circumferential groove (31) for inserting the bottom of the front shell (1) is provided in the bottom shell (3). Sealant (311) is dot-applied in the circumferential groove (31). A knurled structure (11) for increasing the bonding area of the glue is provided on the bottom surface of the front shell (1). A limiting protrusion (12) is horizontally provided on the outer side of the front shell (1). A positioning notch (32) for pressing and placing the limiting protrusion (12) is provided on the outer side of the circumferential groove (31). When the front shell (1) with the PCB board (2) is pressed onto the bottom shell (3) from top to bottom, the bottom of the front shell (1) is inserted into the circumferential groove (31), and the limiting protrusion (12) is synchronously placed into the positioning notch (32).

2. The new energy vehicle CAN test safety method according to claim 1, characterized in that: A CAN communication module, an ECU controller, and a data security module are provided on the PCB board (2); The data communication end of the CAN communication module is connected to the CAN data communication end of the ECU controller, and the data end of the ECU controller is connected to the data end of the data security module; Use the CAN communication module to receive the data sent by the electronic control unit ECU of the new energy vehicle, and after securely processing the received data through the data security module, obtain the test data.

3. The new energy vehicle CAN test safety method according to claim 1, characterized in that: Two limiting protrusions (12) are adopted, and they are asymmetrically located on the outer edge of the front shell (1) left and right.

4. The new energy vehicle CAN test safety method according to claim 1, characterized in that: The bottom shell (3) is symmetrically provided with outwardly extending mounting brackets (33) on the left and right, and the mounting brackets (33) are provided with mounting holes.

5. The new energy vehicle CAN test safety method according to claim 1, characterized in that: The PCB board (2) is installed in the front shell (1) by welding, and the front shell (1) is integrally square in structure.

6. The new energy vehicle CAN test safety method according to claim 1, characterized in that: The sealant (311) is paste-like glue.

7. The new energy vehicle CAN test safety method according to claim 1, characterized in that: The limiting protrusion (12) is flush with the bottom surface of the face shell (1) and is provided with a knurling structure (11); the bottom surface of the positioning notch (32) is flush with the bottom of the annular groove (31); and the thickness of the limiting protrusion (12) is less than the height of the positioning notch (32).

8. The new energy vehicle CAN test safety method according to claim 1, characterized in that: The surface roughness of the annular groove (31) is 6.3-25.

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