A fixing structure of controller MOS tube, controller and electric vehicle

Abstract

The present invention discloses a fixing structure of a controller MOS tube, a controller and an electric vehicle. The number of MOS tubes arranged is 2 rows or more. The fixing structure of the controller MOS tube comprises a heat dissipation base, a silicone strip and a heat dissipation mounting piece, wherein the heat dissipation base extends a heat dissipation wall, the number of the heat dissipation walls is equal to the number of MOS tubes arranged, and each heat dissipation wall is insulatedly contacted and connected with one side of each row of MOS tubes; the other side of each row of MOS tubes is in contact and connected with the silicone strip, and the silicone strip is fixed to the heat dissipation wall through the heat dissipation mounting piece; the fixing structure of the present invention is stable and effective, the heat dissipation path is fast, the fixing component processing and installation procedures adopted are very simple, the production cost is low, the production efficiency is high, and it can meet the needs of fixing a controller with multiple rows of MOS tubes, and is very suitable for mass production applications.

Description

Technical Field

[0001] The present invention belongs to the field of controllers, and specifically relates to a fixing structure of a MOS tube of a controller. The present invention also relates to a controller and an electric vehicle using the fixing structure of the MOS tube of the controller. The present invention is particularly suitable for application in the control field of high-power electric vehicles. Background Art

[0002] Since the MOS tube of the controller inevitably generates heat during operation, it is necessary to conduct the heat to the outside in a timely and rapid manner through the heat dissipation structure. Otherwise, the functions of the related electronic components of the controller will be affected, and even the MOS tube and other related electronic components of the controller will be burned, and finally the controller will not work. Therefore, the heat dissipation performance of the controller is directly related to the service life of the controller. The heat dissipation method for the MOS tube is generally to contact and fix it with the heat dissipation device, so the fixing method of the MOS tube directly determines the heat dissipation performance of the MOS tube.

[0003] At present, there are many optimization technologies disclosed about the heat dissipation or fixing structure of the controller MOS tube. For example, the utility model patent with the authorization announcement number CN205609503U discloses a heat dissipation structure of the electric vehicle controller MOS tube based on a thermal conductive substrate, which includes a heat dissipation shell with a hollow structure, a circuit board is arranged in the heat dissipation shell, and one side of the circuit board is connected to a plurality of MOS tubes arranged side by side through pins, a raised mounting plane is provided on the inner side wall of the heat dissipation shell, a thermal conductive substrate is provided on the mounting plane, one side of the thermal conductive substrate is attached to the mounting plane, and the MOS tube is attached to the other side of the thermal conductive substrate, and an elastic sheet for tightly attaching the heat dissipation shell, the thermal conductive substrate and the MOS tube is provided in the heat dissipation shell. For another example, the invention patent with publication number CN103298285A discloses a MOS tube fixing and heat dissipation structure for an electric vehicle controller, which is used for the installation and fixation of the MOS tube inside the electric vehicle controller and the overall heat dissipation. The outer shell has a wedge-shaped cavity composed of a thick convex wall and an arc-shaped protrusion at a portion adjacent to the MOS tube, and a lateral limiting protrusion is built into the wedge-shaped cavity; the MOS tube is placed on the thick convex wall of the cavity inside the wedge-shaped cavity; a soft wedge-shaped pressure strip is embedded between the MOS tube and the arc-shaped protrusion. These improved technologies all use MOS tubes to be fixed vertically on the circuit board, so that the heat dissipation surface of the MOS tube is on the side of the heat dissipation housing, and the heat dissipation area is small. In order to fix the MOS tube, these improved technologies respectively set limiting bosses and arc-shaped bosses in the heat dissipation housing and around the MOS tube. The setting of the limiting bosses and arc-shaped bosses further compresses the heat dissipation space of the MOS tube, resulting in that the heat dissipation effect of these improved technologies is also very limited, and the processing and installation procedures of the heat dissipation housing are also relatively cumbersome. At the same time, this type of heat dissipation fixing structure is not suitable for heat dissipation of MOS tubes of high-power controllers. This is because the number of MOS tubes in high-power controllers is large, and they are generally arranged in two rows or even three rows or other multi-row structures.

[0004] The prior art closest to the present invention is the authorization announcement number CN205454350U, which discloses a high-power electric vehicle controller MOS tube fixing structure, which includes a circuit board, two rows of MOS tubes are arranged at intervals on the circuit board, and a heat-conducting profile is arranged on the circuit board to cooperate with the two rows of MOS tubes, wherein the heat-conducting profile includes a heat-conducting plate connected to the heat dissipation shell of the high-power electric vehicle controller, and at least one mounting plate for mounting the two rows of MOS tubes extends from one side of the heat-conducting plate, and the two rows of MOS tubes are tightly mounted on both sides of the mounting plate through spring sheets, and an insulating film is arranged between the two rows of MOS tubes and the outer side walls of the mounting plate; the technology uses a spring sheet as a fixing part, and its fixing process is cumbersome, and the spring sheet is a special-shaped part, and the processing yield rate is low, resulting in a high cost of its fixing structure. In addition, the fixing structure is also limited by the number of rows of MOS tubes and can only be used to fix MOS tubes with a number of 2 rows.

[0005] Therefore, it is necessary to improve the fixing structure of the existing controller MOS tube. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a fixing structure of a controller MOS tube, a controller and an electric vehicle. The fixing structure is stable and effective, the heat dissipation path is fast, the processing and installation procedures of the fixing components are very simple, the production cost is low, the production efficiency is high, and it can meet the needs of fixing a controller with multiple rows of MOS tubes. It is very suitable for mass production applications, especially suitable for application in the control field of high-power electric vehicles.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A fixing structure of a controller MOS tube, wherein a plurality of MOS tubes are fixedly arranged on the circuit board, and the MOS tubes are arranged in an array on the circuit board and are perpendicular to the circuit board; the number of the MOS tubes arranged is 2 rows or more;

[0009] The fixing structure of the controller MOS tube includes a heat dissipation base, a silicone strip and a heat dissipation mounting member, wherein:

[0010] The heat dissipation base extends out heat dissipation walls, the number of which is equal to the number of MOS tubes arranged, and each heat dissipation wall is insulated and contacted with one side of each row of MOS tubes;

[0011] The other side of each row of MOS tubes is in contact with and connected to a silicone strip, and the silicone strip is fixed on the heat dissipation wall through a heat dissipation mounting piece.

[0012] Preferably, one side of the heat dissipation mounting member is positioned and connected to the silicone strip, and the other side thereof is fixedly mounted on the heat dissipation wall.

[0013] In order to ensure the stability of the fixed connection between the silicone strip and the heat dissipation mounting part, preferably, the silicone strip is provided with a positioning groove, and one side of the heat dissipation mounting part is provided with a positioning tooth fixedly matched with the positioning groove. Further preferably, the notch of the positioning groove is provided with a guide edge to facilitate the guiding positioning for fixed matching with the positioning tooth.

[0014] Preferably, the number of the positioning grooves is 2 or more, and the outer side surfaces of the silicone strips located on both sides of the positioning grooves are in an outer arc shape, thereby ensuring the fixing effect while ensuring the fixing strength.

[0015] Preferably, the other side of the heat dissipation mounting member is fixedly mounted on the heat dissipation wall by a fastener. Specifically, when the present invention is implemented, the fastener is a screw fastener.

[0016] In order to facilitate the limiting and fixing effect of the MOS tube, preferably, the first limiting protrusion and the second limiting protrusion are respectively provided on both sides of the contact surface where the silicone strip contacts the MOS tube. Further preferably, the first limiting protrusion and the second limiting protrusion are in an outer arc shape to ensure the fixing effect and the fixing strength.

[0017] Preferably, the heat dissipation base integrally extends out of the heat dissipation wall, and specifically can be integrally cast.

[0018] Preferably, the heat dissipation base is extended separately from the heat dissipation wall, which can be specifically connected by welding or by groove-tenon type fixing.

[0019] Preferably, the heat dissipation base and the heat dissipation mounting member are both made of aluminum material to effectively ensure the heat dissipation effect.

[0020] Preferably, a controller comprises a MOS tube, wherein the MOS tube is fixed by using the fixing structure of the controller MOS tube as described above.

[0021] Preferably, an electric vehicle comprises an electric vehicle controller, wherein the electric vehicle controller adopts the controller as described above.

[0022] Preferably, the present invention also provides a method for adjusting the soft and hard start of the electric vehicle controller, wherein the user can control and adjust the soft and hard start performance of the electric vehicle through external operation according to his own needs, thereby accurately adjusting the feeling when starting the electric vehicle, improving the user's comfort, and the user operation is simple and convenient. The technical solution adopted is as follows:

[0023] Preferably, the control method for adjusting the soft and hard start of the electric vehicle controller comprises the following steps:

[0024] A10), the user inputs a start demand to the electric vehicle controller through operation;

[0025] A20), determining the starting current according to the starting demand output in the above step A10);

[0026] A30), controlling the output PWM acceleration value according to the starting current value determined in step A20);

[0027] A40) Realize the soft and hard start adjustment of the electric vehicle controller.

[0028] Preferably, in the step A10), the startup requirement includes a first startup requirement, a second startup requirement and a third startup requirement; in the step A20), the first startup current, the second startup current and the third startup current corresponding thereto are determined respectively according to the first startup requirement, the second startup requirement and the third startup requirement; in the step A30), the first PWM acceleration value, the second PWM acceleration value and the third PWM acceleration value corresponding thereto are controlled and output respectively according to the first startup current, the second startup current and the third startup current; wherein,

[0029] The formula for determining the first starting current is: CuRRent=CuR-Max;

[0030] The formula for determining the second starting current is: CuRRent=CuR-Maxx2 / 3;

[0031] The formula for determining the third starting current is: CuRRent=CuR-Maxx1 / 2;

[0032] CuR and Max are the current value and current start adjustment value preset by the electric vehicle controller respectively;

[0033] Preferably, in the step A1), the user's operation steps include:

[0034] A11), before the electric vehicle is powered on, the handlebar of the electric vehicle is rotated to the bottom, and the electric vehicle is set to the brake state;

[0035] A12), after the electric vehicle is powered on, keeping the electric vehicle in a braking state;

[0036] A13), quickly rotate the handle back to 0 and then rotate it to the bottom;

[0037] A14), executing the above step A13) once represents the first startup requirement; executing the above step A13) twice represents the second startup requirement; executing the above step A13) three times represents the third startup requirement.

[0038] Since the common controllers in the electric vehicle market usually use three-phase six-beat square wave control technology, the main problems are: 1. When the motor is switching, there is a time difference between the current drop time of the off phase and the current rise time of the on phase, which leads to large pulsation and strong noise in the electric vehicle control system; 2. The current phase is not controlled, and the system efficiency is low under heavy load. The sine wave controller uses traditional space voltage vector modulation, which cannot achieve the same efficiency platform operation within the base speed range of plus or minus 30 revolutions, and the speed regulation range is narrow.

[0039] In order to achieve a wide speed regulation range, high efficiency platform and low noise of the electric vehicle controller system, the present invention further preferably has a vector control method of super modulation technology, including the following steps:

[0040] B10), based on the user's demand instruction, the MCU of the electric vehicle controller calculates the currently required overshoot coefficient k1 and simultaneously calculates the phase of the current voltage vector;

[0041] B20), with the control target of ensuring that the phase of the voltage vector remains unchanged, the overshoot coefficient k1 calculated in the above step B10) is compared with the overshoot coefficient actually required at present to obtain the actual overshoot coefficient k2;

[0042] B30), based on the above step B20), the actual overshoot coefficient k2 is obtained, and the three-phase duty cycle is calculated by the sine wave formula, the output PWM pulse width is adjusted, and the output voltage of the electric vehicle controller is adjusted.

[0043] The present invention proposes a heat dissipation base, a silicone strip and a heat dissipation mounting member to realize the fixation of the controller MOS tube. The fixing structure is stable and effective, the heat dissipation path is fast, the processing and installation procedures of the fixing components adopted are very simple, the production cost is low, the production efficiency is high, and it can meet the fixation of the controller with multiple rows of MOS tubes. It is very suitable for mass production applications, especially suitable for application in the control field of high-power electric vehicles with multiple rows of MOS tube structures.

[0044] The present invention further proposes a preferred solution for the fixing structure, which ensures the fixing effect while effectively guaranteeing the fixing installation strength and ensuring the service life of the present invention.

[0045] The present invention proposes a method for adjusting the soft and hard starting of an electric vehicle controller. The user can input different types of starting requirements to the electric vehicle controller according to his own needs through simple external operations, determine different starting currents according to different starting requirements, and then control the output of different PWM acceleration values, so as to achieve the purpose of adjusting the soft and hard starting performance of the electric vehicle, thereby accurately realizing the feeling adjustment when using the electric vehicle to start, improving the user comfort, and the user operation is simple and convenient.

[0046] The present invention further proposes a vector control method of super modulation technology to achieve the technical effects of a wide speed regulation range of plus or minus 30 revolutions under square wave speed, a high efficiency platform and low noise for the electric vehicle controller system. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Attached Figure 1 It is a schematic cross-sectional structure diagram of a controller MOS tube fixing structure according to a specific embodiment of the present invention;

[0048] Attached Figure 2 yes Figure 1 A schematic diagram of the structure enlargement in the middle;

[0049] Attached Figure 3 It is a control step block diagram of the soft and hard start adjustment of the electric vehicle controller under the specific implementation mode of the present invention. DETAILED DESCRIPTION

[0050] The embodiment of the present invention discloses a fixing structure of a controller MOS tube, wherein a plurality of MOS tubes are fixedly arranged on a circuit board, and the MOS tubes are arranged in an array on the circuit board and are perpendicular to the circuit board; the number of the MOS tubes arranged is 2 rows or more; the fixing structure of the controller MOS tube comprises a heat dissipation base, a silicone strip and a heat dissipation mounting piece, wherein the heat dissipation base extends a heat dissipation wall, the number of the heat dissipation walls is equal to the number of the MOS tubes arranged, and each heat dissipation wall is insulatedly contacted and connected to one side of each row of MOS tubes; the other side of each row of MOS tubes is in contact and connected to the silicone strip, and the silicone strip is fixed to the heat dissipation wall through the heat dissipation mounting piece.

[0051] The embodiment of the present invention further discloses a controller, including a MOS tube, wherein the MOS tube is fixed by using the above fixing structure of the controller MOS tube.

[0052] The embodiment of the present invention further discloses an electric vehicle, including an electric vehicle controller, wherein the electric vehicle controller adopts the above controller.

[0053] The embodiment of the present invention proposes a heat dissipation base, a silicone strip and a heat dissipation mounting member to fix the controller MOS tube. The fixing structure is stable and effective, the heat dissipation path is fast, the processing and installation procedures of the fixing components used are very simple, the production cost is low, the production efficiency is high, and it can meet the needs of fixing the controller with multiple rows of MOS tubes. It is very suitable for mass production applications, especially suitable for application in the control field of high-power electric vehicles with multiple rows of MOS tube structures.

[0054] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0055] See also Figure 1A fixing structure of a controller MOS tube is shown, and a plurality of MOS tubes are fixedly arranged on a circuit board. The MOS tubes are arranged in an array on the circuit board 110 and are perpendicular to the circuit board 110. The number of MOS tubes arranged is 2 rows, specifically a first row of MOS tubes 120 and a second row of MOS tubes 130.

[0056] The fixing structure of the controller MOS tube includes a heat dissipation base 140, a first silicone strip 150, a second silicone strip 160, a first heat dissipation mounting member 170 and a second heat dissipation mounting member 180, wherein:

[0057] The heat dissipation base 140 extends a first heat dissipation wall 141 and a second heat dissipation wall 142 , and the first heat dissipation wall 141 and the second heat dissipation wall 142 are respectively insulated and connected to one side of the first row of MOS tubes 120 and the second row of MOS tubes 130 ;

[0058] The other sides of the first row of MOS tubes 120 and the second row of MOS tubes 130 are respectively in contact with and connected to the first silicone strip 150 and the second silicone strip 160 , which are respectively fixed to the first heat dissipation wall 141 and the second heat dissipation wall 142 through the first heat dissipation mounting member 170 and the second heat dissipation mounting member 180 .

[0059] Preferably, in this embodiment, one side of the first heat dissipation mounting member 170 is positioned and connected to the first silicone strip 150, and the other side thereof is fixedly mounted on the first heat dissipation wall 141, and one side of the second heat dissipation mounting member 180 is positioned and connected to the second silicone strip 160, and the other side thereof is fixedly mounted on the second heat dissipation wall 142. In order to ensure the stability of the fixed connection between the first silicone strip 150 and the second silicone strip 160 and the first heat dissipation mounting member 170 and the second heat dissipation mounting member 180, it is further preferred that in the present embodiment, the first silicone strip 150 and the second silicone strip 160 are respectively provided with two positioning grooves, specifically: positioning grooves 151, 152, 161, 162, and one side of the first heat dissipation mounting member 170 and the second heat dissipation mounting member 180 are respectively provided with positioning teeth fixedly matched with the positioning grooves, specifically positioning teeth 171, 172, 181, 182; the outer side surfaces of the silicone strip 150 located on both sides of the positioning grooves 151 and 152 and the outer side surfaces of the silicone strip 160 located on both sides of the positioning grooves 161 and 162 are both in the shape of an outer circular arc, thereby ensuring the fixing effect while ensuring the fixing strength. Further preferably, in the present embodiment, a guide edge (shown in the figure but not marked) is provided at the notch of each positioning groove 151 , 152 , 161 , 162 to facilitate the guiding positioning for fixed fit with the positioning teeth 171 , 172 , 181 , 182 .

[0060] Preferably, the other sides of the first heat dissipation mounting member 170 and the second heat dissipation mounting member 180 are respectively fixedly mounted on the first heat dissipation wall 141 and the second heat dissipation wall 142 by fasteners. Specifically, when the present invention is implemented, the fasteners are screw fasteners 190.

[0061] In order to facilitate the limiting and fixing effect of the MOS tube, preferably, in this embodiment, the first limiting protrusion 153 and the second limiting protrusion 154 are respectively provided on both sides of the contact surface where the first silicone strip 150 contacts and connects with the first row of MOS tubes 120, and the first limiting protrusion 163 and the second limiting protrusion 164 are respectively provided on both sides of the contact surface where the second silicone strip 160 contacts and connects with the second row of MOS tubes 130. Further preferably, in this embodiment, the first limiting protrusions 153, 163 and the second limiting protrusions 154, 164 are in an outer arc shape to ensure the fixing effect while ensuring the fixing strength.

[0062] Preferably, in this embodiment, the heat dissipation base 140 integrally extends the first heat dissipation wall 141 and the second heat dissipation wall 142, which can be specifically integrally cast. In other embodiments of the present invention, the heat dissipation base separately extends the heat dissipation wall, which can be specifically welded or groove-tenon fixedly connected.

[0063] Preferably, in this embodiment, the heat dissipation base 140 , the first heat dissipation mounting member 170 and the second heat dissipation mounting member 180 are all made of aluminum material, which effectively ensures the heat dissipation effect.

[0064] An embodiment of the present invention further provides a controller, comprising a MOS tube, wherein the MOS tube is fixed by using the fixing structure of the controller MOS tube as described above.

[0065] An embodiment of the present invention further provides an electric vehicle, including an electric vehicle controller, wherein the electric vehicle controller adopts the controller as described above.

[0066] See also Figure 3 As shown, the control method for adjusting the soft and hard start of the electric vehicle controller as described above includes the following steps:

[0067] A10), the user inputs a start-up requirement to the electric vehicle controller through operation; preferably, in step A10), the start-up requirement includes a first start-up requirement, a second start-up requirement and a third start-up requirement;

[0068] A20), determining the starting current according to the starting requirement output in the above step A10); preferably, determining the first starting current, the second starting current and the third starting current corresponding to the first starting requirement, the second starting requirement and the third starting requirement respectively;

[0069] A30), controlling the output PWM acceleration value according to the starting current value determined in step A20); preferably, controlling the output of the first PWM acceleration value, the second PWM acceleration value and the third PWM acceleration value corresponding to the first starting current, the second starting current and the third starting current respectively;

[0070] A40) Realize the soft and hard start adjustment of the electric vehicle controller.

[0071] In this embodiment, the formula for determining the first starting current is: CuRRent=CuR-Max; the formula for determining the second starting current is: CuRRent=CuR-Maxx2 / 3; the formula for determining the third starting current is: CuRRent=CuR-Maxx1 / 2; CuR and Max are the current value and current starting adjustment value preset by the electric vehicle controller respectively;

[0072] Preferably, in this embodiment, in step A1), the user's operation steps include:

[0073] A11) Before the electric vehicle is powered on, turn the handlebar of the electric vehicle to the bottom and set the electric vehicle to the brake state;

[0074] A12) After the electric vehicle is powered on, keep the electric vehicle in a brake state;

[0075] A13) Quickly turn the handle back to 0 and then rotate it to the bottom;

[0076] A14), executing the above step A13) once represents the first startup requirement; executing the above step A13) twice represents the second startup requirement; executing the above step A13) three times represents the third startup requirement.

[0077] Further preferably, in this embodiment, the electric vehicle controller also has a vector control method of super modulation technology, including the following operation steps:

[0078] B10), based on the user's demand instruction, the MCU of the electric vehicle controller calculates the currently required overshoot coefficient k1 and simultaneously calculates the phase of the current voltage vector;

[0079] B20), with the control target of ensuring that the phase of the voltage vector remains unchanged, the overshoot coefficient k1 calculated in the above step B10) is compared with the overshoot coefficient actually required at present to obtain the actual overshoot coefficient k2;

[0080] B30), based on the above step B20), the actual overshoot coefficient k2 is obtained, and the three-phase duty cycle is calculated by the sine wave formula, the output PWM pulse width is adjusted, and the output voltage of the electric vehicle controller is adjusted.

[0081] The vector control method of the super modulation technology in this embodiment enables the electric vehicle controller system to achieve a wide speed regulation range of plus or minus 30 revolutions under square wave speed, a high efficiency platform and low noise technical effects.

[0082] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0083] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric vehicle controller, comprising a MOS tube, characterized in that: The MOS tube is fixed by using the fixing structure of the controller MOS tube; the fixing structure of the controller MOS tube comprises: a plurality of MOS tubes are fixedly arranged on the circuit board, the MOS tubes are arranged in an array on the circuit board and are perpendicular to the circuit board; the number of the MOS tubes arranged is 2 rows or more; The fixing structure of the controller MOS tube includes a heat dissipation base, a silicone strip and a heat dissipation mounting member, wherein: The heat dissipation base extends out heat dissipation walls, the number of which is equal to the number of MOS tubes arranged, and each heat dissipation wall is insulated and contacted with one side of each row of MOS tubes; The other side of each row of MOS tubes is in contact with and connected to a silicone strip, and the silicone strip is fixed to the heat dissipation wall through a heat dissipation mounting piece; The electric vehicle controller adopts a control method for adjusting soft and hard start, comprising the following steps: A10), the user inputs a start-up requirement to the electric vehicle controller through operation; in the step A10), the start-up requirement includes a first start-up requirement, a second start-up requirement and a third start-up requirement; A20), determining the starting current according to the starting requirement output in the above step A10); in the step A20), determining the first starting current, the second starting current and the third starting current corresponding to the first starting requirement, the second starting requirement and the third starting requirement respectively; A30), according to the starting current value determined in the above step A20), the output PWM acceleration value is controlled; in the step A30), according to the first starting current, the second starting current and the third starting current, the corresponding first PWM acceleration value, the second PWM acceleration value and the third PWM acceleration value are respectively controlled to be output; wherein, The formula for determining the first starting current is: CuRRent=CuR-Max; The formula for determining the second starting current is: CuRRent=CuR-Maxx2 / 3; The formula for determining the third starting current is: CuRRent=CuR-Maxx1 / 2; CuR and Max are the current value and current start adjustment value preset by the electric vehicle controller respectively; A40) realizes the soft and hard start adjustment of the electric vehicle controller.

2. The electric vehicle controller according to claim 1, characterized in that: One side of the heat dissipation mounting piece is positioned and connected to the silicone strip, and the other side of the heat dissipation mounting piece is fixedly mounted on the heat dissipation wall.

3. The electric vehicle controller according to claim 2, characterized in that: The silicone strip is provided with a positioning groove, and one side of the heat dissipation mounting piece is provided with a positioning tooth fixedly matched with the positioning groove.

4. The electric vehicle controller according to claim 3, characterized in that: The number of the positioning grooves is 2 or more, and the outer side surfaces of the silicone strips located on both sides of the positioning grooves are in an outer arc shape.

5. The electric vehicle controller according to claim 2, characterized in that: The other side of the heat dissipation mounting piece is fixedly mounted on the heat dissipation wall by means of fasteners.

6. The electric vehicle controller according to claim 1, characterized in that: A first limiting protrusion and a second limiting protrusion are respectively provided on both sides of the contact surface where the silicone strip is in contact with the MOS tube.

7. The electric vehicle controller according to claim 1, characterized in that: The heat dissipation base integrally extends out of the heat dissipation wall.

8. The electric vehicle controller according to claim 1, characterized in that: The heat dissipation base is extended separately from the heat dissipation wall.

9. An electric vehicle, comprising an electric vehicle controller, characterized in that: The electric vehicle controller adopts the electric vehicle controller as claimed in any one of claims 1-8.

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