Filtering capacitor fixed connection structure of electric vehicle controller

Abstract

The utility model discloses a filter capacitor fixed connection structure of electric motor car controller, including controller main part, the controller main part is by the upper cover and base constitutes, the upper cover is fixed on the base through bolt, has multiple openings on the upper cover, and the device in the opening contains: three phase line binding post, a positive pole binding post, a negative pole binding post, terminal row inserts group, the base is provided with capacitor placing groove, and the capacitor placing groove has placed seven filter capacitors in proper order, the inside of controller main part is equipped with capacitor connecting plate. The utility model not only can utilize PCB copper foil as the conductive circuit and connect all filter capacitors, and the ripple current loop is short, and the ripple absorption effect is good, and the copper loss is low, improves the process and reliability while reducing the material cost, and can through the pin of filter capacitor and welds on the same circuit board, and the direct distance of filter capacitor pin and power terminal is short, and the filter capacity is improved and more stable.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle controller technology, and in particular to a fixed connection structure for a filter capacitor in an electric vehicle controller. Background Technology

[0002] In the current market, two-wheeled and three-wheeled electric vehicles and electric motorcycles all use controllers to drive and control the motors. At the power input end inside the controller, electrolytic capacitors of sufficient capacity are required to provide noise reduction, filtering, voltage regulation and other functions for the controller, so as to achieve stable motor operation control.

[0003] Currently, the common method for installing filter capacitors in conventional controllers is to directly mount them onto the control board inside the controller. The positive and negative terminals of the power supply are fixed to the main control board by soldering wires to the holes. The surface of the main control board is covered with current-carrying copper strips, which are responsible for connecting the positive and negative terminals to each filter capacitor. However, using conventional methods usually requires laying a large area of ​​current-carrying copper strips, which is costly. The mixed installation of filter capacitors and control chips results in large ripple interference, serious heat generation, and affects the working stability of the control chip. Furthermore, the production of filter capacitor plug-in requires multiple current-carrying copper strips to connect the pins of each main capacitor, which is complex and results in low performance stability. Therefore, those skilled in the art provide a fixed connection structure for filter capacitors in electric vehicle controllers to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fixed connection structure for the filter capacitor of an electric vehicle controller.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A filter capacitor fixed connection structure for an electric vehicle controller includes a controller body, which is composed of a top cover and a base. The top cover is fixed to the base by bolts. The top cover has multiple openings, each containing the following components: three phase wire terminals, one positive terminal, one negative terminal, and a terminal block assembly. The base has capacitor placement slots, in which up to seven filter capacitors are arranged sequentially. The controller body has a filter capacitor connection plate inside, and the pins of the multiple filter capacitors are fixedly connected to the capacitor connection plate by hole welding.

[0007] As a further embodiment of this utility model, a power board is installed inside the main body of the controller, and a control board is fixed above the power board by bolts.

[0008] As a further embodiment of this utility model, the terminal block assembly is installed on the top of the control board by welding, and the three phase wire terminals, positive terminal, and negative terminal are all fixed to the base by bolts.

[0009] As a further embodiment of this utility model, the filter capacitor connection plate has conductive copper foil on both the front and back sides, and the conductive copper foil circuit is used to connect the pins of each filter capacitor.

[0010] As a further embodiment of this utility model, a circular copper foil electrode is provided at one end of the filter capacitor connection plate, and a circular copper foil electrode is provided at the other end of the capacitor connection plate. A circular opening is provided in the middle of both the circular copper foil electrode and the circular copper foil electrode.

[0011] As a further embodiment of this utility model, the circular openings between the first and second circular copper foil electrodes at both ends of the capacitor connection plate are aligned with the fixing bolt holes on the positive and negative terminals that are connected to the power board, respectively. A base step one is installed on one side of the power board, and a base step two is installed on the other side of the power board. The filter capacitor connection plate is fixed on the base step one and the base step two.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. Reduced costs and improved processability: By using PCB copper foil as conductive lines to connect all main capacitors, the current loop is short and the copper loss is low, which reduces material costs while improving processability and reliability.

[0014] 2. Improved Reliability: Traditional controllers use vertically plugged-in filter capacitors, which have long pin distances between each capacitor and high copper resistance at the positive and negative terminals, resulting in mediocre filtering capability, severe heat generation, and low stability. In contrast, the capacitor mounting method described in this patent solders the filter capacitor pins to the same circuit board in both directions, resulting in a shorter direct distance between the filter capacitor pins and the power supply terminals, stronger ripple absorption capability, and more stable overall controller reliability.

[0015] 3. Enhanced safety performance: Traditional controllers use a shared PCB between the filter capacitor and the control chip. Ripple current causes the filter capacitor to generate high temperatures, and the electromagnetic radiation generated by the ripple current reduces the safety of the control chip, resulting in high safety risks. The capacitor mounting method described in this patent mounts the filter capacitor as an independent module, which is in close contact with the aluminum base. This facilitates heat dissipation of the filter capacitor and reduces electromagnetic radiation interference to the control chip. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the controller cover structure of the filter capacitor fixed connection structure of the electric vehicle controller proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of an electric vehicle controller with a fixed connection structure for the filter capacitor, as proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the enlarged structure of the filter capacitor in the fixed connection structure of the filter capacitor of the electric vehicle controller proposed in this utility model.

[0019] Figure 4 This is a top view of the internal structure of the filter capacitor fixed connection structure of an electric vehicle controller proposed in this utility model.

[0020] Figure 5 This is a schematic diagram of the external structure of the filter capacitor fixed connection structure of the electric vehicle controller proposed in this utility model.

[0021] Figure 6 This is a bottom view of the fixed connection structure of the filter capacitor of the electric vehicle controller proposed in this utility model.

[0022] In the diagram: 101, top cover; 102, base; 104, phase wire terminal; 105, positive terminal; 1051, base step one; 106, negative terminal; 1061, base step two; 107, terminal block assembly; 201, power board; 202, control board; 203, capacitor connection board; 204, filter capacitor; 2031, conductive copper foil circuit; 2032, circular copper foil electrode one; 2033, circular copper foil electrode two; 1021, capacitor placement slot. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. It should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection", and "setting" should be interpreted broadly. For those skilled in the art, the specific meaning of the above terms in this patent can be understood according to the specific circumstances.

[0024] Reference Figures 1-6A filter capacitor fixing connection structure for an electric vehicle controller includes a controller body, which is composed of an upper cover 101 and a base 102. The upper cover 101 is fixed to the base 102 by bolts. The upper cover 101 has multiple openings, each containing the following components: three phase wire terminals 104, one positive terminal 105, one negative terminal 106, and a terminal block assembly 107. The base 102 has a capacitor placement slot 1021, in which up to seven filter capacitors 204 are arranged sequentially. The controller body has a capacitor connection plate 203 inside, and the pins of the multiple filter capacitors 204 are connected via... The filter capacitors 204 are fixedly connected to the capacitor connection plate 203 by hole welding. The connection method is as follows: four filter capacitors 204 are located below the horizontal position of the capacitor connection plate 203, with their leads bent upwards to pass through the capacitor connection plate 203, and are welded from the back of the capacitor connection plate 203. The remaining three filter capacitors 204 are located above the horizontal position of the capacitor connection plate 203, with their leads bent downwards to pass through the capacitor connection plate 203, and are welded from the front of the capacitor connection plate 203. After the seven filter capacitors 204 are welded and assembled with the capacitor connection plate 203, four filter capacitors 204 are placed face down and then laid flat in the capacitor placement slot 1021.

[0025] In this utility model, a power board 201 is installed inside the controller body, and a control board 202 is fixed above the power board 201 by bolts.

[0026] In this utility model, the terminal block assembly 107 is mounted on the control board 202 via a patch method, and the three phase wire terminals 104, positive terminal terminal 105, and negative terminal terminal 106 are all bolted to the base 102.

[0027] In this utility model, conductive copper foil lines 2031 are evenly distributed on both sides of the capacitor connection board 203. The conductive copper foil lines 2031 are used to connect the pins of each filter capacitor 204. The conductive copper foil lines 2031 are made of PCB copper foil material.

[0028] In this utility model, a circular copper foil electrode 1 2032 is provided at one end of the capacitor connection plate 203, and a circular copper foil electrode 2033 is provided at the other end of the capacitor connection plate 203. A circular opening is provided in the middle of both the circular copper foil electrode 1 2032 and the circular copper foil electrode 2033.

[0029] In this invention, the circular openings in the middle of the first circular copper foil electrode 2032 and the second circular copper foil electrode 2033 at both ends of the capacitor connection plate 203 are aligned with the fixing bolt holes on the positive terminal 105 and the negative terminal 106, which are connected to the power board 201. A base step 1051 is installed on one side of the power board 201, and a base step 2061 is installed on the other side of the power board 201. The capacitor connection plate 203 is fixed on the base step 1051 and the base step 2061. The external power line is connected to the controller body through the positive terminal 105 and the negative terminal 106. The current enters the controller body through the positive terminal 105, flows through the first circular copper foil electrode 2032 of the capacitor connection plate 203, and is connected to each filter capacitor 204 through the copper foil conductive line 2031 on the PCB.

[0030] In this application, the structures and connections not described in detail are all prior art, and their structures and principles are well known, so they will not be described in detail here.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A filter capacitor fixed connection structure for an electric vehicle controller, comprising a controller body, characterized in that, The controller body consists of an upper cover (101) and a base (102). The upper cover (101) is fixed to the base (102) by bolts. The upper cover (101) has multiple openings, and the openings contain the following components: three phase wire terminals (104), one positive terminal (105), one negative terminal (106), and a terminal block assembly (107). The base (102) has a capacitor placement slot (1021), in which up to seven filter capacitors (204) are placed sequentially. The controller body has a capacitor connection plate (203) inside, and the pins of the multiple filter capacitors (204) are fixedly connected to the capacitor connection plate (203) by hole welding.

2. The filter capacitor fixed connection structure of an electric vehicle controller according to claim 1, characterized in that, A power board (201) is installed inside the main body of the controller, and a control board (202) is fixed above the power board (201) by bolts.

3. The filter capacitor fixed connection structure of an electric vehicle controller according to claim 2, characterized in that, The terminal block assembly (107) is installed above the control board (202) by welding. The three phase wire terminals (104), positive terminal terminal (105), and negative terminal terminal (106) are all bolted to the base (102).

4. The filter capacitor fixed connection structure of an electric vehicle controller according to claim 3, characterized in that, The capacitor connection board (203) has conductive lines (2031) on both the front and back sides, and the conductive lines (2031) are used to connect the pins of each filter capacitor (204).

5. The filter capacitor fixed connection structure of an electric vehicle controller according to claim 4, characterized in that, One end of the capacitor connection plate (203) is provided with a circular copper foil electrode one (2032), and the other end of the capacitor connection plate (203) is provided with a circular copper foil electrode two (2033). Both the circular copper foil electrode one (2032) and the circular copper foil electrode two (2033) are provided with a circular opening in the middle.

6. The filter capacitor fixed connection structure of an electric vehicle controller according to claim 5, characterized in that, The circular openings between the first circular copper foil electrode (2032) and the second circular copper foil electrode (2033) at both ends of the capacitor connecting plate (203) are aligned with the fixing bolt holes on the positive terminal (105) and the negative terminal (106) that are connected to the power plate (201). A base step one (1051) is installed on one side of the power plate (201), and a base step two (1061) is installed on the other side of the power plate (201). The capacitor connecting plate (203) is fixed on the base step one (1051) and the base step two (1061).

Images