CN216145469U

CN216145469U - Composite power resistance module

Info

Publication number: CN216145469U
Application number: CN202121673829.XU
Authority: CN
Inventors: 肖金花
Original assignee: Suzhou Hongdun Electronic Technology Co ltd
Current assignee: Suzhou Hongdun Electronic Technology Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-03-29
Anticipated expiration: 2031-07-22

Abstract

The utility model discloses a composite power resistor module which comprises a mounting support, wherein the top of the mounting support is provided with a shell for containing, a resistor body assembly is arranged in the shell, the resistor body assembly is composed of a winding resistor body and a thick film chip, a filler is arranged in the shell and positioned at the top of the resistor body assembly, and a top block is arranged in the shell and positioned at the top of the filler. The utility model integrates two functions of a charging current-limiting resistor and a discharging resistor, has high module integration level, is internally provided with a temperature control chip, can be matched with an external circuit to realize internal temperature monitoring protection, adopts a series-parallel structure of a plurality of winding resistors for the current-limiting resistor, has strong overcurrent capacity and flexible combination mode, adopts a thick film resistor chip for the discharging resistor, and can realize wider resistance parameter range. Thick film chip is direct attached at the shell internal surface, and heat dispersion is good, and continuous power is high, adopts multilayer or multiple material to fill, satisfies the requirement high to the heat conductivity promptly, can satisfy dampproofing and waterproofing again, and high temperature resistant, cryogenic performance is excellent.

Description

Composite power resistance module

Technical Field

The utility model relates to the technical field of resistance modules, in particular to a composite power resistance module.

Background

High-power electrical equipment is generally provided with a current-limiting resistor and a discharge resistor, wherein the current-limiting resistor mostly uses a ripple resistor or an aluminum-shell wire-wound resistor, and is required to have higher overcurrent capacity. And the discharge resistor mostly uses an aluminum shell wire-wound resistor or a thick film resistor module, and is required to have higher continuous load capacity. Because the two parts adopt different manufacturing processes and packaging structures and can only exist in the form of mutually independent discrete components, the adverse factors of large occupied space of equipment on a user side, high use cost and the like are caused, and the integration and miniaturization of the electric drive electric control system are influenced particularly in the new energy automobile industry.

To this end, we propose a composite power resistor module to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a composite power resistance module which is suitable for traditional electrical equipment and new energy automobile electric control equipment.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a composite power resistor module, includes the installing support, the installing support top is equipped with the shell that is used for holding, the inside resistive element subassembly that is equipped with of shell, and resistive element subassembly comprises wire-wound resistive element and thick film chip, the inside resistive element subassembly top that is located of shell is equipped with the filler, and the filler top is located the inside kicking block that is equipped with of shell.

Furthermore, the mounting bracket is composed of a bottom plate and a limiting clamping plate, the limiting clamping plate is respectively located in the middle positions of two sides of the top of the bottom plate, the limiting clamping plate is of an inverted L shape, and the middle positions of two ends of the bottom plate are respectively provided with lug blocks capable of being provided with screws.

Further, spacing cardboard top extends to with kicking block top butt, the position in the middle of the shell both sides all be equipped with spacing cardboard assorted draw-in groove.

Further, the thick film chip is including setting up the thick film resistor substrate in its bottom, and thick film resistor substrate top one end is equipped with the control by temperature change chip, all is connected with first wire on the thick film resistor substrate top other end and the control by temperature change chip.

Furthermore, the winding resistor body is in a group, the two ends of the winding resistor body are provided with the same mounting piece, the two mounting pieces are respectively clamped with the vertical grooves matched with the inside of the shell, and one end of the winding resistor body is provided with a second lead penetrating through the mounting pieces.

Further, the temperature control chip uses a PTC, an NTC or a temperature control switch for detecting the operating temperature of the resistor.

Furthermore, the thick film chip is formed by a ceramic insulation substrate and thick film printing paste through a sintering process, and the thick film chip is attached to the bottom of the shell through a heat-conducting adhesive material.

Compared with the prior art, the utility model has the beneficial effects that:

1. the functions of the charging current limiting and the discharging resistor are integrated, and the integration level of the module is high;

2. a temperature control chip is arranged in the temperature control device, and can be matched with an external circuit to realize internal temperature monitoring protection;

3. the current-limiting resistor adopts a series-parallel structure of a plurality of wire-wound resistors, the overcurrent capacity is strong, and the combination mode is flexible;

4. the discharge resistor adopts a thick film resistor chip, and can realize a wider resistance parameter range. The thick film chip is directly attached to the inner surface of the shell, so that the heat dissipation performance is good, and the continuous power is high;

5. the material is filled by multiple layers or multiple materials, so that the requirement on high heat conductivity is met, the waterproof and moistureproof performances are met, and the high-temperature and low-temperature resistance is excellent;

6. simple process, compact structure and low use cost.

Drawings

Fig. 1 is a schematic top view of a composite power resistor module according to the present invention;

fig. 2 is a schematic bottom view of a composite power resistor module according to the present invention;

FIG. 3 is a schematic view of the structure of FIG. 1 with the filler and the top block removed;

fig. 4 is an exploded view of fig. 1.

In the figure: 1. a base plate; 2. a limiting clamping plate; 3. a housing; 4. a card slot; 5. a thick film chip; 6. a first conductive line; 7. mounting a sheet; 8. a winding resistor body; 9. a second conductive line; 10. a filler; 11. a top block; 12. and a temperature control chip.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-4, a composite power resistor module, including the installing support, the installing support is used for outside fixed mounting, the installing support comprises bottom plate 1 and spacing cardboard 2, spacing cardboard 2 is located the intermediate position of bottom plate 1 top both sides respectively, spacing cardboard 2 is the L type of invering for having elasticity, spacing cardboard 2 top extends to with the 11 top butt of kicking block, the position in the middle of the 3 both sides of shell all is equipped with spacing cardboard 2 assorted draw-in groove 4, the intermediate position at bottom plate 1 both ends all is equipped with the ear piece of mountable screw.

The top of the mounting bracket is provided with a shell 3 for containing, the shell 3 is made of ceramic materials and has insulating and heat conducting functions, the shell 3 is mainly used as a carrier of the resistor body component and is made of ceramic insulating shells, the resistor body assembly is in limit clamping connection with an installation support through a clamping groove 4 on the surface, a filler 10 is arranged on the top of the resistor body assembly inside the shell 3, the filler 10 compresses and abuts against parts inside the shell 3, the filler 10 is made of materials with high specific heat capacity and high heat conductivity, the materials are prepared by aluminum oxide, talcum powder, silicon oxide powder, organic silicon resin and the like according to a proportion, the good embedment material of heat-absorbing heat-conducting ability has high insulation and high heat conductivility simultaneously promptly, and filler 10 top is located that 3 insides of shell are equipped with kicking block 11, and kicking block 11 is convenient for press through by the spacing knot of two spacing cardboard 2 at filler 10 top for kicking block 11 can not break away from 3 insides of shell easily with filler 10.

The inner part of the shell 3 is provided with a resistor body component which is composed of a winding resistor body 8 and a thick film chip 5 and integrates two groups of functions of a current limiting resistor and a discharge resistor, the winding resistor body 8 can be connected together by a plurality of cylindrical winding resistor bodies 8 with different numbers in a series-parallel connection mode and a support structure according to different design parameters, the thick film chip 5 comprises a thick film resistor substrate arranged at the bottom of the thick film resistor substrate, one end of the top of the thick film resistor substrate is provided with a temperature control chip 12, the temperature control chip 12 adopts PTC, NTC or a temperature control switch and is used for detecting the running temperature of the resistor, the thick film chip 5 is composed of a ceramic insulating substrate and thick film printing paste through a sintering process, the thick film chip 5 is attached to the bottom of the shell 3 through a heat conduction adhesive material, the other end of the top of the thick film resistor substrate and the temperature control chip 12 are both connected with a first lead 6 and a first lead 6 connected with the thick film resistor substrate, the external interface of the discharge resistor is connected with a first lead 6 connected with a temperature control chip 12, the external interface of the temperature monitor is connected with the external interface of the temperature monitor, a group of winding resistor bodies 8 are arranged, two ends of a group of winding resistor bodies 8 are provided with a same mounting piece 7, the two mounting pieces 7 are respectively clamped with matched vertical grooves in the shell 3, one end of a group of winding resistor bodies 8 is respectively provided with a second lead 9 penetrating through the mounting piece 7, and the second lead 9 is externally used for a pre-charging current-limiting interface

The technical scheme adopted by the utility model is as follows:

1. respectively printing thick film paste and electrode paste on the surface of a ceramic substrate, and sintering at high temperature for curing and forming to form a thick film resistor substrate;

2. attaching the temperature control chip 12 to the thick film resistor substrate, and connecting by a reflow soldering process; welding a section of the cable with a reserved length with a thick film resistor substrate to form a complete thick film chip 5;

3. injecting heat-conducting curing glue into the bottom of the shell 3, putting the thick film chip 5 into the shell, and applying pressure, heating and curing;

4. the cylindrical winding resistor body 8 with required specifications is produced by using a wire winding process and specifically comprises a metal cap, a ceramic rod and an alloy wire;

5. cutting and shaping pins of the cylindrical winding resistor body 8, installing the pins between the two installation sheets 7, welding the resistor bodies through the pins in a related mode, and connecting the resistor bodies in a serial or parallel mode to form the winding resistor body 8;

6. the winding resistor body 8 is placed in the shell 3 and clamped with the inner wall of the shell 3 through the mounting sheet 7, and the resistor body is positioned above the thick film chip 5;

7. uniformly mixing materials such as aluminum oxide, talcum powder, silicon oxide powder and organic silicon resin, pouring the mixture into the assembled shell 3, and baking and curing at high temperature to form a filler 10;

8. the resistor housing 3 after the above process is poured with fillers such as epoxy resin or cured resin added with talcum powder, and is baked and cured at high temperature. The sealing may be performed using a filler such as a room temperature curing resin.

In the present invention, the installation manner, the connection manner, or the setting manner of all the components described above are all common mechanical manners, and the specific structures, models, and coefficient indexes of all the components are their own technologies, which can be implemented as long as the beneficial effects thereof can be achieved, and thus, the details are not repeated.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

In the present invention, unless otherwise specified, the terms "upper, lower, left, right, front, back, inner, outer, vertical and horizontal" and the like included in the terms only represent the orientation of the terms in the conventional use state or are colloquially understood by those skilled in the art, and should not be construed as limiting the terms, and meanwhile, the terms "first", "second" and "third" and the like do not represent specific numbers and sequences, but are merely used for name differentiation, and the terms "include", "include" and any other variations are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus.

Claims

1. The utility model provides a composite power resistor module, its characterized in that includes the installing support, the installing support top is equipped with shell (3) that are used for holding, the inside resistive element subassembly that is equipped with of shell (3), and resistive element subassembly comprises wire-wound resistive element (8) and thick film chip (5), the inside resistive element subassembly top that is located of shell (3) is equipped with filler (10), and filler (10) top is located the inside kicking block (11) that is equipped with of shell (3).

2. The composite power resistor module as claimed in claim 1, wherein the mounting bracket is composed of a bottom plate (1) and a limiting clamping plate (2), the limiting clamping plate (2) is respectively located at the middle positions of two sides of the top of the bottom plate (1), the limiting clamping plate (2) is in an inverted L shape, and the middle positions of two ends of the bottom plate (1) are respectively provided with an ear block for mounting a screw.

3. The composite power resistor module as claimed in claim 2, wherein the top of the limiting clamping plate (2) extends to abut against the top of the top block (11), and the middle positions of the two sides of the housing (3) are provided with clamping grooves (4) matched with the limiting clamping plate (2).

4. The composite power resistor module as claimed in claim 1, wherein the thick film chip (5) comprises a thick film resistor substrate disposed at the bottom thereof, and a temperature control chip (12) is disposed at one end of the top of the thick film resistor substrate, and the first conductive wire (6) is connected to the other end of the top of the thick film resistor substrate and the temperature control chip (12).

5. The composite power resistor module as claimed in claim 1, wherein the winding resistor (8) is a group, the two ends of the winding resistor (8) in a group are provided with the same mounting piece (7), the two mounting pieces (7) are respectively clamped with the matched vertical groove in the shell (3), and one end of the winding resistor (8) in a group is respectively provided with the second lead (9) penetrating through the mounting piece (7).

6. A composite power resistor module according to claim 4, characterized in that the temperature control chip (12) uses PTC, NTC or temperature controlled switches for sensing the operating temperature of the resistor.

7. A composite power resistor module according to claim 4, characterized in that the thick film chip (5) is made of a ceramic insulating substrate and a thick film printing paste by a sintering process, and the thick film chip (5) is attached to the bottom of the housing (3) by a heat conducting adhesive material.