CN214848220U - Novel capacitor device for integrated motor controller - Google Patents

Abstract

The utility model relates to a novel capacitor device for an integrated starter motor controller, which comprises an injection molding busbar assembly, an safety capacitor circuit board, a capacitor core, a heat conducting insulating pad and an elastic pressing plate; the safety capacitor circuit board is respectively connected with a positive copper bar, a negative copper bar and a grounding copper bar of the injection molding busbar assembly; the capacitor core is placed in a U-shaped groove on the injection molding busbar assembly; the capacitor core is tightly attached to the heat-conducting insulating pad and the elastic pressing plate; the positive and negative leads of the capacitor core are connected to the positive and negative copper bars. Compared with the prior art, the injection molding busbar assembly of the utility model adopts an integrated injection molding process, positive and negative copper bars are arranged in a laminated manner from top to bottom, the equivalent series inductance ESL of the capacitor is small, the middle of the positive and negative copper bars is filled with plastic by injection molding, the types of parts are few, the assembly process is simple, and the manufacturing cost of the capacitor is reduced; the capacitor cores are horizontally arranged, and the whole capacitor device is low in height and stable in gravity center, so that the motor controller system is convenient to miniaturize.

Description

Novel capacitor device for integrated motor controller

Technical Field

The utility model belongs to the technical field of integrated form enlightenment machine controller system and specifically relates to a novel electric capacity device for integrated form enlightenment machine controller is related to.

Background

The light mixing motor controller system is a light mixing power system which is based on a starting generator and has the functions of starting, generating, boosting, energy recovery and the like. The starter motor does not assist in the running process of the engine, but when the engine is started, the starter motor rapidly drags the engine to rotate above the idle speed, so that the starting time is obviously shortened, the fuel efficiency is improved, and the fuel saving effect is about 5-10 percent generally. Since the starter motor controller system is generally disposed at the front end of the engine, in a hybrid vehicle that is also referred to as a P0 structure and is equipped with the technology alone, the starter motor controller system that operates under severe conditions over the years must have high temperature resistance, vibration resistance, and high reliability, and therefore, sub-components inside the starter motor controller system must also have good heat dissipation, high strength, and high vibration resistance.

Because the capacitor has the advantages of high capacitance value, large ripple current resistance, low cost and the like, the system for starting the motor controller generally selects the capacitor to filter and store energy for a system circuit. The structural arrangement of the core inside the capacitor device not only influences the structural stability of the whole capacitor device, but also influences the arrangement of the positive busbar and the negative busbar so as to influence the equivalent series inductance ESL of the whole capacitor device, and the overhigh ESL can cause the damage of a core component power module of a motor controller system under the working state of the capacitor, so that how to reduce the ESL of the capacitor is the key of capacitor design. The scheme is arranged to current electric capacity core vertical commonly used for electric capacity device increases too much in the direction of height, and the focus is too high, and whole electric capacity device's structural stability can receive the influence, and is unfavorable for integrating and the miniaturization of whole motor controller system of starting, and on the other hand, the scheme is arranged to electric capacity core vertical has certain lack in the aspect of the heat dissipation, leads to the heat dissipation inhomogeneous easily, and then influences the life of electric capacity.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a novel capacitor device for an integrated motor controller, wherein an injection molding busbar assembly of the novel capacitor device adopts an integrated injection molding process, positive and negative copper bars are arranged in a laminated manner from top to bottom, the equivalent series inductance ESL of the capacitor is small, the middle of the positive and negative copper bars is filled with plastic by injection molding, the conventional insulating paper scheme between the positive and negative copper bars of the capacitor is cancelled, the types of parts for the whole capacitor are few, the assembly process is simple, and the manufacturing cost of the capacitor can be reduced; the capacitor cores in the novel capacitor device are horizontally arranged, so that the whole capacitor device is low in height and stable in gravity center, and the miniaturization of a motor controller system can be facilitated.

The purpose of the utility model can be realized through the following technical scheme:

a novel capacitor device for an integrated starter motor controller comprises an injection molding busbar assembly, an safety capacitor circuit board, a capacitor core, a heat conduction insulating pad and an elastic pressing plate;

the safety capacitor circuit board is respectively connected with the positive copper bar, the negative copper bar and the grounding copper bar of the injection busbar assembly;

a plurality of U-shaped grooves are formed in a plastic base of the injection molding busbar assembly, and the capacitor cores are placed in the U-shaped grooves; the elastic pressing plate is connected with the injection molding busbar assembly, and the heat conduction insulating pad is arranged between the capacitor core and the elastic pressing plate;

and the positive lead of the capacitor core is connected to the positive copper bar, and the negative lead of the capacitor core is connected to the negative copper bar.

Preferably, the injection molding busbar assembly is provided with 1 or more mounting through holes for mounting and fixing the novel capacitor device.

Preferably, the injection molding busbar assembly comprises a stud, a plastic base, a positive copper bar, a negative copper bar and a ground copper bar; the positive copper bar and the negative copper bar are stacked up and down, and a gap between the positive copper bar and the negative copper bar is filled with plastic;

the cathode copper bar comprises a cathode input end hole and a plurality of cathode welding grooves;

the positive input end hole is connected with the stud in an interference fit manner, the negative input end hole is connected with the stud in an interference fit manner, and the stud is connected to the plastic base;

the positive electrode welding grooves are respectively and electrically connected with positive electrode leads of the capacitor cores in TIG welding, and the negative electrode welding grooves are respectively and electrically connected with negative electrode leads of the capacitor cores in TIG welding.

Preferably, the U-shaped groove is arranged on the bottom surface of the injection molding busbar assembly

Preferably, the stud, the plastic base, the positive copper bar, the negative copper bar and the grounding copper bar are integrally formed by injection molding.

Preferably, a square groove is formed in the plastic base, and the safety capacitor circuit board is fixed in the square groove.

Preferably, the positive copper bar is provided with a positive bending bulge, the negative copper bar is provided with a negative bending bulge, and the safety capacitor circuit board is provided with a positive connecting hole, a negative connecting hole and a grounding connecting hole;

the positive electrode bending protrusion is electrically connected with the positive electrode connecting hole in a soldering mode, the negative electrode bending protrusion is electrically connected with the negative electrode connecting hole in a soldering mode, the grounding copper bar is electrically connected with the grounding connecting hole in a soldering mode, and silica gel is filled in the square groove after welding.

Preferably, the plastic base is provided with a plastic protrusion and a plastic groove, and the plastic protrusion and the plastic groove are used for isolating the positive copper bar from the negative copper bar.

Preferably, the capacitor core is cylindrical, and a housing concave cavity is arranged on the cylinder; the U-shaped groove is consistent with the surface contour dimension of the capacitor core, a raised rib corresponding to the housing concave cavity of the capacitor core is arranged in the groove and used for positioning and fixing the capacitor core before TIG welding, and a small amount of epoxy glue is filled in the U-shaped groove before the capacitor core is installed.

Preferably, the novel capacitor device further comprises a bolt, a through hole is formed in the elastic pressing plate, a bolt mounting hole is formed in the injection molding busbar assembly, and the bolt passes through the through hole and the bolt mounting hole to connect the elastic pressing plate to the injection molding busbar assembly.

Preferably, the heat conducting insulating pad has a certain compression amount and is placed close to the surface of the capacitor core.

Preferably, the elastic pressing plate comprises a plurality of elastic arc structures, the elastic arc structures are connected through a gap structure, and the elastic arc structures are matched with the surface profile of the capacitor core.

The heat-conducting insulating pad is tightly attached to the surface of the capacitor core, and the elastic pressing plate is used for tightly pressing and fixing the heat-conducting insulating pad and the capacitor core through bolts.

Preferably, the positive lead and the negative lead of the capacitor core are led out in the same direction and fixed on a plastic base of the injection molding busbar assembly.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) novel electric capacity device's female subassembly of arranging of moulding plastics adopts integrative injection moulding process, and the stromatolite is arranged about positive negative copper bar, and the equivalent series inductance ESL of electric capacity is little, and is filled with plastics injection moulding in the middle of the positive negative copper bar, has cancelled the insulating paper scheme of using always between the positive negative copper bar of traditional electric capacity, and the part kind that whole electric capacity was used is few and assembly process is simple, can reduce the manufacturing cost of electric capacity.

(2) The capacitor cores in the novel capacitor device are horizontally arranged, so that the whole capacitor device is low in height and stable in gravity center, and the miniaturization of a motor controller system can be facilitated.

(3) The capacitor core is arranged in a U-shaped groove of the injection molding busbar assembly, the groove is internally provided with a raised rib which is consistent with the outline of a shell concave cavity of the capacitor core, the installation and the fixation of the capacitor core are facilitated, epoxy glue is filled and sealed in the U-shaped groove before the capacitor core is installed, the fixation strength of the capacitor core can be improved, and the heat conductivity of the capacitor core can also be improved.

(4) The welding groove structure of the copper bar can slow down the rapid loss of heat when TIG welding is carried out on the positive and negative lead wires of the capacitor core, the heat is effectively collected, the quality of the formed welding joint is good, the efficiency is high, and the automation is convenient.

(5) Set up the elastic pressure plate among the novel capacitor device, elastic arc structure and breach structure have been set up in this elastic pressure plate, the material is the spring steel, after arranging the subassembly with bolt fastening elastic pressure plate to moulding plastics, elastic pressure plate produces certain deflection, under the vibration operating mode, elastic pressure plate can effectively inhale the shake according to the elastic deflection that self possesses, thereby improve the vibration resistance of whole electric capacity, and under the frequent abominable operating mode of cold and hot circulation, the electric capacity core can produce certain dimensional change in the effect of expend with heat and contract with cold, the existence of this breach structure can be guaranteed two elastic arc structures in the middle of the elastic pressure plate and can change along with the dimensional change of electric capacity core, thereby make elastic pressure plate remain the compressing tightly effect to the electric capacity core throughout, such structure setting makes the intensity of whole electric capacity obtain improvement by a wide margin.

(6) The output side of novel electric capacity device's positive negative pole copper bar has set up the installation through-hole, the integrated form of being convenient for is inspired the bolted connection of power module and electric capacity that motor controller system used, prior art often adopts ultrasonic bonding to connect power module and electric capacity, this kind of connection structure is in case electric capacity or power module trouble take place, both all will scrap, and is with high costs, and adopt this kind of bolted connection mode, when electric capacity or power module break down, separation can be dismantled to electric capacity and power module, the later stage maintenance of being convenient for.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the novel capacitor device in the embodiment;

FIG. 2 is an exploded view of the novel capacitor device of the embodiment;

FIG. 3 is an exploded view of an injection molded busbar assembly according to an embodiment;

FIG. 4 is a schematic structural diagram of an injection molding base in the injection molding busbar assembly in the embodiment;

FIG. 5 is a schematic structural diagram of a positive copper bar in the injection molding busbar assembly in the embodiment;

FIG. 6 is a schematic structural view of a negative copper bar in the injection molded busbar assembly in the embodiment;

FIG. 7 is a schematic structural diagram of an ampere-capacitor circuit board according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a capacitor core in the novel capacitor in the embodiment;

FIG. 9 is a schematic diagram of an embodiment of a thermally conductive insulating pad;

FIG. 10 is a schematic structural view of an elastic pressing plate in the embodiment;

in the figure, 1, an injection molding busbar assembly, 1-1, a stud, 1-2, a plastic base, 1-2-1, a U-shaped groove, 1-2-2, a plastic bulge, 1-2-3, a plastic groove, 1-3, a positive copper bar, 1-3-1, a positive welding groove, 1-3-2, a positive bending bulge, 1-3-3, a positive input end hole, 1-4, a negative copper bar, 1-4-1, a negative welding groove, 1-4-2, a negative bending bulge, 1-4-3, a negative input end hole, 1-5, a grounding copper bar, 2, an ampere-standard capacitor circuit board, 2-1, a positive connecting hole, 2-2, a grounding connecting hole, 2-3 and a negative connecting hole, 3. 3-1 parts of a capacitor core, 3-2 parts of a positive lead, 3-3 parts of a negative lead, 4 parts of a shell cavity, 5 parts of a heat conducting insulating pad, 5 parts of an elastic pressing plate, 5-1 parts of an elastic arc structure, 5-2 parts of a notch structure, 6 parts of a bolt, 7 parts of an installation through hole.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example 1:

a novel capacitor device for an integrated motor controller is shown in figures 1 and 2 and comprises an injection molding busbar assembly 1, a safety capacitor circuit board 2, a capacitor core 3, a heat-conducting insulating pad 4 and an elastic pressing plate 5.

The injection molding busbar assembly 1 comprises a stud 1-1, a plastic base 1-2, a positive copper bar 1-3, a negative copper bar 1-4 and a grounding copper bar 1-5, wherein the positive copper bar 1-3 and the negative copper bar 1-4 are arranged in an up-and-down stacked mode. The stud 1-1, the plastic base 1-2, the positive copper bar 1-3, the negative copper bar 1-4 and the grounding copper bar 1-5 are integrally formed by injection molding. During injection molding, the middle gap between the positive copper bar 1-3 and the negative copper bar 1-4 is filled with plastic, so that the electric insulation performance of the capacitor is ensured; the forming process reduces the types of parts, simplifies the assembly process of the capacitor, and simultaneously cancels the step of adding insulating paper between the traditional busbars, thereby saving the cost.

The novel capacitor device comprises an input end and an output end. The positive copper bar 1-3 and the negative copper bar 1-4 are arranged in an up-and-down stacked mode, and at the input end, a positive input end hole 1-3-3 in the positive copper bar 1-3 and a negative input end hole 1-4-3 in the negative copper bar 1-4 are respectively connected with the stud 1-1 in an interference fit mode; at the output end, the anode welding groove 1-3-1 on the anode copper bar 1-3 is connected with the anode lead 3-1 of the capacitor core 3, and the cathode welding groove 1-4-1 on the cathode copper bar 1-4 is connected with the cathode lead 3-2 of the capacitor core 3.

The plastic base 1-2 is provided with a plastic bulge 1-2-2 and a plastic groove 1-2-3 at the output end, and the plastic bulge 1-2-2 and the plastic groove 1-2-3 on the plastic base 1-2 are electrically isolated between the positive copper bar 1-3 and the negative copper bar 1-4.

The plastic base 1-2 is provided with a plurality of U-shaped grooves 1-2-1, the capacitor core 3 is placed in the U-shaped grooves 1-2-1, the capacitor core 3 is cylindrical, and the cylinder is provided with a shell concave cavity 3-3; the U-shaped groove 1-2-1 is consistent with the surface contour dimension of the capacitor core 3, a raised rib corresponding to the housing cavity 3-3 of the capacitor core 3 is arranged in the groove and used for positioning and fixing the capacitor core 3, and a small amount of epoxy glue is filled in the U-shaped groove 1-2-1 before the capacitor core 3 is installed and used for improving the heat conductivity and the vibration resistance of the capacitor core 3.

In this embodiment, the U-shaped groove 1-2-1 is formed at the bottom of the plastic base 1-2. Heat conduction insulating pad 4 has certain compression capacity, and hugs closely electric capacity core 3 surfaces, places and arranges the 1 bottom surface of subassembly in moulding plastics, and elastic pressure plate 5 presses under heat conduction insulating pad 4 to fixed connection compresses tightly fixed heat conduction insulating pad 4 and electric capacity core 3 on female subassembly 1 of moulding plastics, realizes electric capacity core 3, heat conduction insulating pad 4 and elastic pressure plate 5's monolithic stationary.

In this embodiment, novel electric capacity device still includes bolt 6, is equipped with the through-hole on the elastic pressure plate 5, and female subassembly 1 of arranging of moulding plastics is equipped with the bolt mounting hole, and bolt 6 is connected to female subassembly 1 of moulding plastics with elastic pressure plate 5 through-hole and bolt mounting hole on. The elastic pressing plate 5 comprises a plurality of elastic arc structures 5-1, the elastic arc structures 5-1 are connected through a gap structure 5-2, and the elastic arc structures 5-1 are matched with the surface profile of the capacitor core 3.

The positive electrode copper bar 1-3 comprises a positive electrode input end hole 1-3-3 and a plurality of positive electrode welding grooves 1-3-1, and the negative electrode copper bar 1-4 comprises a negative electrode input end hole 1-4-3 and a plurality of negative electrode welding grooves 1-4-1; the positive lead 3-1 of the capacitor core 3 is connected with the positive welding groove 1-3-1TIG welding, the negative lead 3-2 of the capacitor core 3 is connected with the negative welding groove 1-4-1 TIG welding, the welding groove structure of the copper bar can slow down the rapid heat loss during TIG welding connection, the heat is effectively collected, and the formed welding joint has good quality and high efficiency.

The plastic base 1-2 is provided with a square groove 1-2-4, and the safety capacitor circuit board 2 is fixed in the square groove 1-2-4. The positive electrode copper bar 1-3 is provided with a positive electrode bending bulge 1-3-2, the negative electrode copper bar 1-4 is provided with a negative electrode bending bulge 1-4-2, and the safety capacitor circuit board 2 is provided with a positive electrode connecting hole 2-1, a negative electrode connecting hole 2-3 and a grounding connecting hole 2-2; the positive electrode bending bulge 1-3-2 is electrically connected with the positive electrode connecting hole 2-1 in a soldering mode, the negative electrode bending bulge 1-4-2 is electrically connected with the negative electrode connecting hole 2-3 in a soldering mode, the grounding copper bar 1-5 is electrically connected with the grounding connecting hole 2-2 in a soldering mode, and silica gel is filled in the square groove 1-2-4 after welding.

The positive electrode bending bulge 1-3-2 and the negative electrode bending bulge 1-4-2 are in the shapes of narrow upper ends and wide lower ends, a heat transfer path is prolonged during welding, soldering is facilitated, and silica gel is filled in the square groove 1-2-4 after soldering to further fix the safety capacitor circuit board 2.

Be equipped with 1 or a plurality of installation through-hole 7 on female subassembly 1 of moulding plastics for install and fixed novel capacitor device. The bolted connection of power module and electric capacity that the integrated form of being convenient for enlightening machine controller system was used, prior art often adopts ultrasonic bonding to connect power module and electric capacity, and in case electric capacity or power module trouble take place for this kind of connection structure, both all will scrap, and are with high costs, and adopt this kind of bolted connection mode, when electric capacity or power module break down, separation can be dismantled to electric capacity and power module, the later stage maintenance of being convenient for.

The specific implementation process is as follows:

as shown in fig. 1 and 2, the novel capacitor device for the integrated motor controller comprises an injection molding busbar assembly 1, an ampere-standard capacitor circuit board 2, a capacitor core 3, a heat-conducting insulating pad 4, an elastic pressing plate 5 and a bolt 6.

Firstly, placing a capacitor core 3 in an internal U-shaped groove 1-2-1 of an injection molding busbar assembly 1, tightly attaching a heat-conducting insulating pad 4 to the surface of the capacitor core 3, placing the capacitor core on the bottom surface of the injection molding busbar assembly 1, pressing an elastic pressure plate 5 below the heat-conducting insulating pad 4, and fixing the elastic pressure plate on the injection molding busbar assembly 1 through a bolt 6; and then positive and negative electrode leads of the capacitor core 3 are respectively electrically connected with positive electrode copper bar 1-3 output ends and negative electrode copper bar 1-4 output ends in the injection molding busbar assembly 1 by TIG welding, the safety capacitor circuit board 2 is placed in the square groove 1-2-4 at the bottom of the injection molding busbar assembly 1 and is respectively soldered with the positive electrode copper bar 1-3, the negative electrode copper bar 1-4 and the grounding copper bar 1-5 in the injection molding busbar assembly 1, and finally, the groove at the bottom of the injection molding busbar assembly 1 is filled with silica gel for fixation.

As shown in fig. 3, the injection molding busbar assembly 1 is integrally injection molded by a stud 1-1, a plastic base 1-2, an anode copper bar 1-3, a cathode copper bar 1-4 and a grounding copper bar 1-5, wherein the anode copper bar 1-3 and the cathode copper bar 1-4 are stacked up and down, the interlayer gap is 0.5mm, and the middle gap between the anode copper bar 1-3 and the cathode copper bar 1-4 is filled with plastic during injection molding, so that the electric insulation performance of a capacitor is ensured; whole female subassembly 1 of moulding plastics is type of calligraphy structure, and weak place in the middle of input and output has all set up the strengthening rib, is favorable to improving the holistic structural strength of injection molding.

As shown in fig. 4, in this embodiment, the plastic base 1-2 includes 4U-shaped grooves 1-2-1, 3 plastic protrusions 1-2-2, 3 plastic grooves 1-2-3, and 1 square groove 1-2-4, wherein the inside of the U-shaped groove 1-2-1 is provided with a plastic protrusion rib corresponding to the housing cavity 3-3 of the capacitor core 3.

As shown in fig. 4, in this embodiment, 6 mounting through holes 7 are formed in the plastic base 1-2, and openings corresponding to the mounting through holes 7 are also formed in the positive copper bar 1-3 and the negative copper bar 1-4, so as to facilitate mounting and fixing of the whole capacitor device.

As shown in FIG. 5, 4 anode welding grooves 1-3-1, 1 anode bending protrusion 1-3-2 and 1 anode input end hole 1-3-3 are arranged on an anode copper bar 1-3, 4 anode welding grooves 1-3-1 are respectively connected with an anode lead 3-1TIG welding of a capacitor core 3, the welding grooves have 3 branches, wherein the middle one is bent downwards, the other two sides are vertically upwards, the branches at the two sides and the bent branch at the middle have certain intervals, the bent branch and the capacitor core lead are melted to form a welding joint during TIG welding, the anode welding groove structure of the copper bar can slow down the rapid heat loss during TIG welding, the heat is effectively collected, the formed welding joint has good quality and high efficiency, the anode bending protrusion 1-3-2 is in a shape with a narrow upper end and a wide lower end, the structure is beneficial to the subsequent soldering process, and the positive input end hole 1-3-3 is connected with the stud 1-1 in an interference fit manner.

As shown in figure 6, 8 negative electrode welding grooves 1-4-1, 1 negative electrode bending bulge 1-4-2 and 1 negative electrode input end hole 1-4-3 are arranged on the negative electrode copper bar 1-4, the 8 negative electrode welding grooves 1-4-1 are respectively connected with a negative electrode lead 3-2TIG welding of the capacitor core 3, the structure principle of the negative electrode welding grooves is consistent with that of the positive electrode welding grooves, the TIG welding is convenient to implement, the negative electrode bending bulge 1-4-2 is in a shape with a narrow upper end and a wide lower end, the follow-up tin soldering process is facilitated, and the negative electrode input end hole 1-4-3 is in interference fit connection with the stud 1-1.

As shown in figure 7, the safety capacitor circuit board 2 comprises an anode connecting hole 2-1, a grounding connecting hole 2-2 and a cathode connecting hole 2-3, the connecting holes are respectively in tin soldering electrical connection with an anode bending bulge 1-3-2, a cathode bending bulge 1-4-2 and a grounding copper bar 1-5, the bending bulge is narrow at the upper end and wide at the lower end, a heat transfer path is prolonged during welding, the tin soldering is facilitated, and silica gel is filled in a square groove 1-2-4 of a plastic base 1-2 after the tin soldering so as to further fix the safety capacitor circuit board 2.

As shown in figure 8, a positive lead 3-1, a negative lead 3-2 and a shell cavity 3-3 are arranged on a capacitor core 3, the positive lead 3-1 and the negative lead 3-2 of the capacitor core 3 are led out in the same direction, the whole capacitor core 3 is fixed on a plastic base 1-2 in an injection molding busbar assembly 1, when the capacitor core 3 is installed, the shell cavity 3-3 of the capacitor core is matched with a plastic protruding rib in a U-shaped groove 1-2-1 on the plastic base 1-2, so that the capacitor core 3 is favorably positioned when installed, and a small amount of epoxy glue is filled in the U-shaped groove 1-2-1 before the capacitor core 3 is installed, so that the heat conductivity and the vibration resistance of the capacitor core 3 are improved.

As shown in fig. 9, the heat conducting insulating pad 4 is placed close to the surface of the capacitor core 3, the shell of the capacitor core 3 is in a negative pole charged state during operation, the heat conducting insulating pad 4 has an electrical isolation effect on the one hand, and on the other hand, the heat of the capacitor core 3 in the operating state can be transferred to the outside, which is beneficial to prolonging the service life of the capacitor core 3.

As shown in fig. 10, the elastic pressure plate 5 includes an elastic arc structure 5-1 and a gap structure 5-2, and there are 4 elastic arc structures 5-1, each elastic arc structure 5-1 is corresponding to and compresses a capacitor core 3, the elastic pressure plate 5 is made of spring steel, and will generate a certain amount of deformation after being fixed on the injection molding busbar assembly 1, under the vibration condition, the elastic pressure plate 5 can effectively absorb vibration according to the elastic deformation amount of itself, so as to improve the vibration resistance of the whole capacitor, and under the severe condition of frequent cold and hot cycles, the capacitor core 3 will generate a certain size change under the action of expansion with heat and contraction with cold, and the gap structure 5-2 can ensure that the two elastic arc structures 5-1 in the middle of the elastic pressure plate 3 can change along with the size change of the core, so that the elastic pressure plate 5 always keeps the compression effect on the capacitor core 3, the strength of the whole capacitor is improved.

The elastic pressing plate 5 is fixedly connected to the injection molding busbar assembly 1 through bolts 6, as shown in fig. 9 and 10, 2 through holes are formed in the elastic pressing plate 5, corresponding holes are formed in the heat conduction insulating pad 4, and as shown in fig. 4, two corresponding bolt mounting holes are formed in the injection molding busbar assembly 1. The bolt 6 connects the elastic pressing plate 5 to the injection molding busbar assembly 1 through the through hole and the bolt mounting hole.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. A novel capacitor device for an integrated starting motor controller is characterized by comprising an injection molding busbar assembly (1), an safety capacitor circuit board (2), a capacitor core (3), a heat-conducting insulating pad (4) and an elastic pressing plate (5);

the injection molding busbar assembly (1) comprises a plastic base (1-2), a positive copper bar (1-3), a negative copper bar (1-4) and a grounding copper bar (1-5), wherein the safety capacitor circuit board (2) is respectively connected with the positive copper bar (1-3), the negative copper bar (1-4) and the grounding copper bar (1-5) of the injection molding busbar assembly (1);

a plurality of U-shaped grooves (1-2-1) are formed in a plastic base (1-2) of the injection molding busbar assembly (1), and the capacitor core (3) is placed in the U-shaped grooves (1-2-1); the elastic pressing plate (5) is connected with the injection molding busbar assembly (1), and the heat conduction insulating pad (4) is arranged between the capacitor core (3) and the elastic pressing plate (5);

and an anode lead (3-1) of the capacitor core (3) is connected to the anode copper bar (1-3), and a cathode lead (3-2) of the capacitor core (3) is connected to the cathode copper bar (1-4).

2. The novel capacitor device for the integrated starter motor controller according to claim 1, wherein the injection-molded busbar assembly (1) comprises a stud (1-1), a plastic base (1-2), a positive copper bar (1-3), a negative copper bar (1-4) and a ground copper bar (1-5); the positive copper bar (1-3) and the negative copper bar (1-4) are arranged in an up-and-down stacked manner, and a gap between the positive copper bar (1-3) and the negative copper bar (1-4) is filled with plastic;

the anode copper bar (1-3) comprises an anode input end hole (1-3-3) and a plurality of anode welding grooves (1-3-1), and the cathode copper bar (1-4) comprises a cathode input end hole (1-4-3) and a plurality of cathode welding grooves (1-4-1);

the positive input end hole (1-3-3) is connected with the stud (1-1) in an interference fit manner, the negative input end hole (1-4-3) is connected with the stud (1-1) in an interference fit manner, and the stud (1-1) is connected to the plastic base (1-2);

the positive electrode welding grooves (1-3-1) are respectively and electrically connected with positive electrode leads (3-1) of the capacitor cores (3) in TIG welding, and the negative electrode welding grooves (1-4-1) are respectively and electrically connected with negative electrode leads (3-2) of the capacitor cores (3) in TIG welding.

3. The novel capacitor device for the integrated starter motor controller as claimed in claim 2, wherein the stud (1-1), the plastic base (1-2), the positive copper bar (1-3), the negative copper bar (1-4) and the ground copper bar (1-5) are integrally injection molded.

4. The novel capacitor device for the integrated starter motor controller as claimed in claim 1, wherein the plastic base (1-2) is provided with a square groove (1-2-4), and the safety-regulation capacitor circuit board (2) is fixed in the square groove (1-2-4).

5. The novel capacitor device for the integrated starter motor controller as claimed in claim 1, wherein the plastic base (1-2) is provided with plastic protrusions (1-2-2) and plastic grooves (1-2-3), and the plastic protrusions (1-2-2) and the plastic grooves (1-2-3) are used for isolating the positive copper bar (1-3) and the negative copper bar (1-4).

6. The new capacitive device for an integrated starter motor controller according to claim 1, characterized in that said capacitive core (3) is cylindrical, provided with a housing cavity (3-3); the U-shaped groove (1-2-1) is consistent with the surface contour size of the capacitor core (3), and raised ribs corresponding to the housing concave cavity (3-3) of the capacitor core (3) are arranged in the groove.

7. The novel capacitor device for the integrated starter motor controller according to claim 1, wherein the injection molded busbar assembly (1) is provided with 1 or more mounting through holes (7), and the mounting through holes (7) are used for mounting and fixing the novel capacitor device.

8. The novel capacitor device for the integrated starter motor controller according to claim 1, further comprising a bolt (6), wherein a through hole is formed in the elastic pressing plate (5), a bolt mounting hole is formed in the injection molded busbar assembly (1), and the bolt (6) connects the elastic pressing plate (5) to the injection molded busbar assembly (1) through the through hole and the bolt mounting hole.

9. The novel capacitor device for an integrated starter motor controller according to claim 8, characterized in that the elastic pressure plate (5) comprises a plurality of elastic arc structures (5-1), the elastic arc structures (5-1) are connected with each other through a gap structure (5-2), and the elastic arc structures (5-1) are matched with the surface contour of the capacitor core (3).

10. The novel capacitor device for the integrated starter motor controller according to claim 1, wherein the positive copper bar (1-3) is provided with a positive bending bulge (1-3-2), the negative copper bar (1-4) is provided with a negative bending bulge (1-4-2), and the safety capacitor circuit board (2) is provided with a positive connecting hole (2-1), a negative connecting hole (2-3) and a ground connecting hole (2-2);

the positive electrode bending bulge (1-3-2) is electrically connected with the positive electrode connecting hole (2-1) in a soldering mode, the negative electrode bending bulge (1-4-2) is electrically connected with the negative electrode connecting hole (2-3) in a soldering mode, and the grounding copper bar (1-5) is electrically connected with the grounding connecting hole (2-2) in a soldering mode.

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