Power harness assembly, APTC heater device and automobile

Abstract

The utility model relates to the technical field of heaters, and provides a power harness assembly, which comprises a lead, an upper cover and a rubber plug waterproof structure, one end of the lead can be provided with a connector, the upper cover is provided with an assembly position for installing the rubber plug waterproof structure, and the rubber plug waterproof structure is in interference fit with the upper cover. The rubber plug waterproof structure is provided with a through hole for the wire to pass through, and the wire is in interference fit with the through hole. The APTC heater device comprises a heating core body and further comprises the power wire harness assembly, and the upper cover is installed on the heating core body. The automobile comprises the APTC heater device. According to the utility model, the waterproof structure of the power harness assembly is designed, and two interference fit positions are matched, so that the IP67 protection grade can be realized; the core body shell adopts a frame type design, and the bottom of the core body shell is provided with a fixed clamping groove, so that the core body shell is higher in structural reliability and simpler to assemble, and the times of buckle assembly and screw fastening are reduced technologically.

Description

Technical Field

[0001] The utility model relates to the technical field of heaters, in particular to a power harness assembly, an APTC heater device and a car. Background Art

[0002] New energy vehicles are already the trend of future automobile development. Unlike traditional fuel vehicles, new energy vehicles do not have engines, which makes in-car heating a problem. PTC, as a positive temperature coefficient semiconductor material, can generate heat by itself when powered on, and has the advantages of high heating efficiency, fast temperature rise, no open flame, and safety.

[0003] The power harness of the existing PTC heater has a low waterproof grade, which may fail to meet the requirements in some working conditions and cause power failure. In addition, the heating components of the existing PTC heater are usually assembled by fastening with buckles and screws, which is relatively cumbersome. Utility Model Content

[0004] The purpose of the utility model is to provide a power harness assembly, an APTC heater device and a car, which can at least solve some of the defects in the prior art.

[0005] To achieve the above-mentioned purpose, an embodiment of the utility model provides the following technical solution: a power wiring harness assembly, including a wire with a connector at one end, and also including an upper cover and a rubber plug waterproof structure, the upper cover has an assembly position for installing the rubber plug waterproof structure, the rubber plug waterproof structure has an interference fit with the upper cover, the rubber plug waterproof structure has a through hole for the wire to pass through, and the wire has an interference fit with the through hole.

[0006] Furthermore, the rubber plug waterproof structure comprises a rubber plug and a rubber plug cover, an assembly box for loading the rubber plug is provided at the assembly position of the upper cover, and the rubber plug cover is pressed on the assembly box.

[0007] Furthermore, the other end of the wire passes through the upper cover, and a conductive terminal is provided at the end of the wire.

[0008] The embodiment of the utility model provides another technical solution: an APTC heater device, including a heating core and the above-mentioned power harness assembly, wherein the upper cover is mounted on the heating core.

[0009] Furthermore, the heating core comprises a shell, and the shell is clamped with the upper cover via a boss and a groove, and the groove is filled with glue.

[0010] Furthermore, the heating core comprises a plurality of heating components and a shell into which the heating components are inserted, and a bottom of the shell is provided with a slot for positioning and fixing the heating components.

[0011] Furthermore, the gap between the heating component and the shell is filled with glue.

[0012] Furthermore, the heating component includes two electrode sheets and a plurality of PTC chips arranged in strips, each of the PTC chips is sandwiched between the two electrode sheets, and an insulating heat-conductive layer is wound around the two electrode sheets sandwiching the PTC chips to form an integral component, and the integral component is inserted into an aluminum tube, and a heat dissipation strip is provided on the outside of the aluminum tube.

[0013] Furthermore, a conductive nut is injection-molded on the heating core, a busbar is provided above the heating core, and the power harness assembly is electrically connected to the busbar via the conductive nut.

[0014] The embodiment of the utility model provides another technical solution: a car, comprising the above-mentioned APTC heater device.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. By designing the waterproof structure of the power harness assembly and combining it with two interference fits, the IP67 protection level can be achieved.

[0017] 2. The core shell adopts a frame design with a fixed slot at the bottom. Its structure is more reliable and easier to assemble. The number of snap-on assembly and screw tightening is reduced in the process.

[0018] 3. The copper nut is injection molded in the core shell, and the terminal on the power harness assembly is locked and contacted with the busbar by bolts, forming a passage with the power harness, which simplifies the conduction circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A disassembly diagram of an APTC heater device provided in an embodiment of the utility model;

[0020] Figure 2 A partial vertical cross-sectional view of an assembly of an APTC heater device provided by an embodiment of the utility model;

[0021] Figure 3 A disassembled schematic diagram of a power harness assembly provided by an embodiment of the utility model;

[0022] Figure 4 A disassembly schematic diagram of a heating assembly provided in an embodiment of the utility model;

[0023] In the accompanying drawings: 1-upper cover; 2-rubber plug cover; 3-wire; 4-rubber plug; 5-screw; 6-conductive terminal; 7-bus; 8-conductive nut; 9-heating component; 10-housing; 11-self-tapping screw; 12-room temperature curing glue; 13-medium temperature curing glue; 14-heat dissipation bar; 15-aluminum tube; 16-polyimide film; 17-electrode sheet; 18-room temperature curing glue; 19-PTC chip; 20-dummy sheet. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 and Figure 3 The embodiment of the utility model provides a power harness assembly, including an upper cover 1, a wire 3 with a connector at one end, and a rubber plug 4 waterproof structure. The upper cover 1 has an assembly position for installing the rubber plug 4 waterproof structure, and the rubber plug 4 waterproof structure has an interference fit with the upper cover 1. The rubber plug 4 waterproof structure has a through hole for the wire 3 to pass through, and the wire 3 has an interference fit with the through hole. In this embodiment, by designing the waterproof structure of the power harness assembly and cooperating with two interference fits, the IP67 protection level can be achieved. Specifically, the rubber plug 4 waterproof structure has a good waterproof effect, and then by designing the interference fit, the rubber plug 4 waterproof structure and the upper cover 1 have good waterproofness. At the same time, the through hole of the rubber plug 4 waterproof structure for the wire 3 to pass through is also designed, so that they are also interference fits, so that a good waterproof effect can be achieved. Finally, after testing, the power harness assembly can reach the IP67 protection level. A connector can be set at one end of the wire 3, and the power harness assembly can be connected to an external power supply through the connector to power the heating core. The other end of the wire 3 passes through the upper cover 1, and the end of the wire 3 is provided with a conductive terminal 6, which can be conveniently electrically connected to the heating core. The conductive terminal 6 is stripped at the end of the wire 3, and then the conductive terminal 6 is pressed onto the wire 3 by a terminal crimping machine. There are two wires 3, and the waterproof structure of the rubber plug 4 has two through holes for the two wires 3 to pass through respectively.

[0026] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 and Figure 2, the waterproof structure of the rubber plug 4 includes a rubber plug 4 and a rubber plug cover 2, an assembly box for the rubber plug 4 to be loaded is provided at the assembly position of the upper cover 1, and the rubber plug cover 2 is pressed on the assembly box. In this embodiment, the wire 3 passes through the rubber plug cover 2, the rubber plug 4, and the upper cover 1 in sequence, and the rubber plug cover 2 is fastened to the upper cover 1 through a snap-fit ​​structure. Specifically, an assembly box can be designed at the assembly position of the upper cover 1, the rubber plug 4 can be embedded in the assembly box, and then the rubber plug cover 2 can be fastened to the assembly box through a snap-fit ​​structure, so that the rubber plug 4 is pressed by the rubber plug cover 2 and the upper cover 1 to form an interference fit.

[0027] See also Figures 1 to 4 The embodiment of the utility model provides an APTC heater device, including a heating core and the above-mentioned power harness assembly, and the upper cover 1 is installed on the heating core. In this embodiment, the above-mentioned power harness assembly is used in the APTC heater device to supply power to the heating core. APTC is an air (Air) PTC heater. The heater is not controlled, and the power harness assembly is used to supply power to the heating core. For example, when a 48V DC voltage is provided, the PCT chip works at full load, and when the power is cut off, the PTC chip 19 does not work, and the on-off of the power supply is integrated in the superior vehicle-mounted ECU.

[0028] See also Figure 1 , Figure 2 and Figure 4, the above-mentioned heating core is refined, the heating core includes a shell 10, the shell 10 is clamped with the upper cover 1 through a boss and a groove, and the groove is filled with glue. The heating core includes a plurality of heating components 9 and a shell 10 for inserting the heating components 9, and a slot for positioning and fixing the heating components 9 is provided at the bottom of the shell 10. In this embodiment, the heating core includes a shell 10 and a heating component 9 in the shell 10. The heating component 9 can usually be provided in three groups, and a total of 18 PTC chips 19 are used. They are installed in the shell 10 by insertion, and a slot is provided at the bottom of the shell 10 to facilitate the positioning and fixing of the heating component 9. After the heating component 9 is installed in the shell 10, glue can be poured into the shell 10, such as pouring medium-temperature curing glue 13, and the height of the glue filling is flush with the mouth of the aluminum tube 15. After curing, the heating component 9 can be fixed in the shell 10. In addition, the housing 10 and the upper cover 1 are connected in the form of bosses and grooves, and then glue, such as room temperature curing glue 12, is poured into the groove, and then the upper cover 1 and the housing 10 are locked and fixed by self-tapping screws 11 to form a closed space and improve the IP protection level. The wire 3 can pass through the upper cover 1 and connect to the power supply through the connector after passing through the silicone waterproof structure. The glue in the groove can be evenly dotted along the circle using a glue dispenser. After the medium temperature curing glue is injected into the gap between the housing 10 and the heating component 9, the semi-finished product is first placed in an oven for baking and curing, and then the housing 10 and the upper cover 1 are bonded with room temperature curing glue 12. Preferably, the heating component 9 can be used in three groups, which are inserted into the frame-shaped housing 10 in sequence. The card slot in the housing 10 can be matched with the aluminum tube 15 of the heating component 9. The housing 10 adopts a frame design, and a fixed card slot is designed at the bottom. Its structural reliability is stronger, the assembly is simpler, and the number of snap assembly and screw tightening is reduced in the process.

[0029] As an optimization solution of the embodiment of the utility model, please refer to Figure 4The heating component 9 includes two electrode sheets 17 and a plurality of PTC chips 19 arranged in strips, each of the PTC chips 19 is sandwiched between the two electrode sheets 17, and the two electrode sheets 17 sandwiching the PTC chips 19 are wound with an insulating heat-conducting layer to form an integral component, and the integral component is inserted into the aluminum tube 15, and a heat dissipation strip 14 is arranged on the outside of the aluminum tube 15. In this embodiment, the heating component 9 is composed of a heat dissipation strip 14, an aluminum tube 15, an insulating heat-conducting layer, an electrode sheet 17, a room temperature curing glue, a PTC chip 19 and a dummy sheet 20. Among them, the insulating heat-conducting layer is a polyimide film 16, and the electrode sheet 17 can be a copper electrode sheet. Specifically, high-temperature glue is screen-printed on the assembly surfaces of two copper electrode sheets, a dummy sheet 20 and six PTC chips 19 are arranged in sequence on one of the copper electrode sheets, and another electrode sheet 17 is attached thereon, sandwiching the PTC chip 19 in the middle to form the positive and negative poles of the PTC heating chip, and a circle of polyimide film 16 is rolled on the outside of the electrode sheet 17. The polyimide film 16 plays the role of insulation and heat conduction. The entire rolled assembly is inserted into the interior of the aluminum tube 15 and is crimped together by a hydraulic press. The two sides of the aluminum tube 15 are designed to be concave arcs. When crimping, the deformation is toward the inside of the aluminum tube 15, which just fixes the entire assembly to be fixed in the middle of the aluminum tube 15. A few millimeters of space are reserved at the bottom of the aluminum tube 15, and room temperature curing glue 18 is poured in to seal it. The heat dissipation strip 14 and the aluminum tube 15 are arranged as required, such as Figure 3 , and then fix it with a fixture, pass through a high-temperature tunnel furnace, and use high-temperature glue to cure and bond firmly.

[0030] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 and Figure 2 A conductive nut 8 is injection-molded on the heating core, a busbar 7 is provided above the heating core, and the power harness assembly is electrically connected to the busbar 7 through the conductive nut 8. In this embodiment, there are two busbars 7, and the two busbars 7 are assembled with the copper electrode sheet through the conductive nuts 8 on the core shell 10, and are firmly welded by soldering. The conductive nut 8 can be a copper nut. The conductive terminal 6 is pressed and fixed to the copper electrode sheet by the screw 5, and the upper cover 1 and the shell 10 are locked and fixed by the self-tapping screw 11. The conductive terminal 6 on the power harness assembly is in contact with the busbar 7 through bolt locking, and forms a passage with the power harness.

[0031] The present utility model embodiment provides a car, including the above-mentioned APTC heater device. In this embodiment, the car can be a new energy car, and the APTC heater device can be used in the new energy car, adapted to the 48V voltage platform of the new energy car, and is an auxiliary heating device for the air conditioning heating of the new energy car and the 48V mild hybrid model. In terms of performance, the rated voltage is 48V DC, the ambient temperature is 25°C, and the air intake volume is 225m 3 / h, its electric power is 1200W±10%; the IP grade is IP67.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power harness assembly, comprising a wire with a connector at one end, characterized in that: It also includes an upper cover and a rubber plug waterproof structure, wherein the upper cover has an assembly position for installing the rubber plug waterproof structure, the rubber plug waterproof structure has an interference fit with the upper cover, the rubber plug waterproof structure has a through hole for the wire to pass through, and the wire has an interference fit with the through hole.

2. The power harness assembly according to claim 1, characterized in that: The rubber plug waterproof structure comprises a rubber plug and a rubber plug cover. An assembly box for loading the rubber plug is provided at the assembly position of the upper cover, and the rubber plug cover is pressed on the assembly box.

3. The power harness assembly according to claim 1, characterized in that: The other end of the wire passes through the upper cover, and a conductive terminal is provided at the end of the wire.

4. An APTC heater device, comprising a heating core, characterized in that: It also includes a power wiring harness assembly as described in any one of claims 1-3, wherein the upper cover is mounted on the heating core.

5. The APTC heater device according to claim 4, characterized in that: The heating core comprises a shell, and the shell is clamped with the upper cover through a boss and a groove, and the groove is filled with glue.

6. The APTC heater device according to claim 4, characterized in that: The heating core comprises a plurality of heating components and a shell into which the heating components are inserted, and a bottom of the shell is provided with a slot for positioning and fixing the heating components.

7. The APTC heater device according to claim 6, characterized in that: The gap between the heating component and the shell is filled with glue.

8. The APTC heater device according to claim 6, characterized in that: The heating component includes two electrode sheets and a plurality of PTC chips arranged in strips, each of the PTC chips is sandwiched between the two electrode sheets, and an insulating heat-conducting layer is wound around the two electrode sheets sandwiching the PTC chips to form an integral component, and the integral component is inserted into an aluminum tube, and a heat dissipation strip is provided on the outside of the aluminum tube.

9. The APTC heater device according to claim 4, characterized in that: A conductive nut is formed by injection molding on the heating core, a busbar is arranged above the heating core, and the power harness assembly is electrically connected to the busbar through the conductive nut.

10. An automobile, characterized in that: Comprising the APTC heater device as described in any one of claims 4-9.

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