CN221763816U

CN221763816U - High protection PTC liquid heater

Info

Publication number: CN221763816U
Application number: CN202420208675.4U
Authority: CN
Inventors: 苏俊; 卜欢; 吴帆; 唐宇靖; 孙后伟; 陶月方
Original assignee: Jiangsu Zhicheng New Energy Technology Co ltd
Current assignee: Jiangsu Zhicheng New Energy Technology Co ltd
Priority date: 2024-01-29
Filing date: 2024-01-29
Publication date: 2024-09-24
Anticipated expiration: 2034-01-29

Abstract

The utility model belongs to the technical field of new energy automobiles, and particularly relates to a high-protection PTC liquid heater which comprises a front aluminum pipe and a plurality of platform boards arranged on the periphery of the front aluminum pipe, wherein PTC heating plates are arranged on the platform boards, insulating films are arranged on the outer sides of the PTC heating plates, a PCB (printed Circuit Board) which is arranged between the front aluminum pipe and the insulating films and is electrically connected with the PTC heating plates is arranged at one end of the PTC heating plates, a filling sealing ring is arranged between the front aluminum pipe and the insulating films and is positioned at one end of the PCB, which is far away from the PTC heating plates, an end bracket is arranged on the outer side of one end of the insulating films, a wiring cavity is formed in the end bracket, and two high-voltage wires and two low-voltage wires are electrically connected to the PCB. According to the utility model, all wiring positions can be arranged inside the end support, the waterproof and dustproof purposes are achieved through the whole encapsulation silica gel, and the protection grade of IP67 can be achieved.

Description

High protection PTC liquid heater

Technical Field

The utility model belongs to the technical field of new energy automobiles, and particularly relates to a high-protection PTC liquid heater.

Background

With the rapid development of new energy automobiles, the quality requirements on the whole automobile are continuously improved, and the productivity requirements on automobile parts are also continuously improved;

Because the optimal working environment temperature of the battery in the electric automobile is 25-35 ℃, in order to cope with extreme weather conditions of heat and cold, the damage to the battery in the use process of the new energy automobile is reduced, the service life of the battery is prolonged, the thermal management activity of the battery is developed, and on the other hand, as the unbalance of the power generation and the power consumption in each region and the different requirements of different seasons and different periods on the power, the energy storage and the heating have a scope of application;

In the prior art, although a plurality of products for heating water and storing energy of batteries exist, the wires are more and messy, a plurality of heating cores are needed to be arranged on the device, each heating core needs to be provided with two wires, due to the increase of wire harnesses, even if a glue filling sealing mode is adopted, the sealing is not in place, or the thickness of the sealed part of the silica gel is insufficient, so that the PTC waterproof performance is not good, and the waterproof grade of the PTC waterproof device can only achieve IP55.

Disclosure of utility model

The utility model aims to provide a high-protection PTC liquid heater, which can set all wiring positions inside an end support, can achieve the purposes of water resistance and dust prevention through integrally encapsulating silica gel, and can achieve the protection grade of IP 67.

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

The utility model provides a high protection PTC liquid heater, includes aluminium pipe before pressing and sets up a plurality of platform boards in the aluminium pipe week side before pressing, a plurality of all be equipped with the PTC heating piece on the platform board, a plurality of the outside of PTC heating piece is equipped with the insulating film, before pressing between aluminium pipe and the insulating film and be located the one end of a plurality of PTC heating pieces and install the PCB board with a plurality of PTC heating piece electric connection, before pressing between aluminium pipe and the insulating film and be located the one end that the PCB board kept away from the PTC heating piece and install the packing circle;

An end support is arranged on the outer side of one end of the insulating film, a wiring cavity is formed in the end support, two high-voltage wires and two low-voltage wires are electrically connected to the PCB, the two high-voltage wires and the two low-voltage wires extend to the outer side of the end support through the wiring cavity, and a silica gel cover is further arranged in the wiring cavity;

And silica gel is poured into the end support.

Further, the PTC heating plate comprises two PTC plates electrically connected with the PCB, a plurality of ceramic plates and a plurality of electrode strips are arranged between the two PTC plates, and the ceramic plates and the electrode strips are arranged at intervals.

Further, the ceramic sheet and the electrode bars are adhered to the PTC sheet through silica gel.

Further, the connection mode of the PTC sheet and the PCB board is soldering connection.

Further, an installation cavity is further formed in the end support, and a ceramic seat propped against the aluminum pipe before pressing and a temperature controller propped against the ceramic seat are installed in the installation cavity.

The utility model has the technical effects that:

According to the high-protection PTC liquid heater, as the outgoing lines are few, only two outgoing lines with high voltage and two outgoing lines with low voltage are provided, all the wiring positions are arranged in the end support, the waterproof and dustproof purposes are achieved through the whole encapsulation silica gel, and the protection grade of IP67 can be achieved even higher.

The high-protection PTC liquid heater adopts the wiring mode of the PCB, has simple assembly mode, is not easy to make mistakes, is easy to realize automatic production, and has high production efficiency.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic diagram of the explosive structure of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. Pressing a front aluminum pipe; 2. a flat table top; 3. a PTC sheet; 4. a ceramic sheet; 5. electrode strips; 6. an insulating film; 7. a seal head; 8. a PCB board; 9. a seal ring; 10. an end bracket; 11. a wiring cavity; 12. a silica gel cover; 13. a mounting cavity; 14. a temperature controller; 15. a ceramic base; 16. a fastening screw; 17. thermal insulation cotton; 18. and sealing glue.

Detailed Description

The present utility model will be specifically described with reference to examples below in order to make the objects and advantages of the present utility model more apparent. It should be understood that the following text is intended to describe only one or more specific embodiments of the utility model and does not limit the scope of the utility model strictly as claimed.

As shown in fig. 1-2, a high protection PTC liquid heater comprises a pre-pressing aluminum tube 1 and a plurality of platform boards 2 arranged on the periphery of the pre-pressing aluminum tube 1, wherein the pre-pressing aluminum tube 1 is a hollow pipeline, one end of the pre-pressing aluminum tube is a liquid inlet, the other end of the pre-pressing aluminum tube is a liquid outlet, PTC heating sheets are assembled on the plurality of platform boards 2, and insulating films 6 are assembled on the outer sides of the PTC heating sheets, so that the pre-pressing aluminum tube 1 and the PTC heating sheets can form an integrated structure;

In order to supply power to the PTC heating plates, a PCB (printed Circuit Board) 8 electrically connected with the PTC heating plates is arranged between the front aluminum pipe 1 and the insulating film 6 and at one end of the PTC heating plates, a sealing ring 9 for filling gaps between the front aluminum pipe 1 and the insulating film 6 is arranged between the front aluminum pipe 1 and the insulating film 6 and at one end of the PCB 8 far away from the PTC heating plates, and the PCB 8 is clamped on the sealing ring 9;

Simultaneously, the one end outside of insulating film 6 is equipped with end support 10, has seted up wiring chamber 11 on the end support 10, and electric connection has two high-voltage lines and two low-voltage lines on the PCB board 8, and two high-voltage lines and two low-voltage lines all extend to the outside of end support 10 through wiring chamber 11, and the inside silica gel lid 12 that seals its opening that still is equipped with of wiring chamber 11.

In order to further improve the protection level, the inside of the end bracket 10 is filled with silica gel for curing and sealing, and finally the aim of waterproofing is achieved.

At this time, because the outgoing lines are few, only two high-voltage lines and two low-voltage lines are outgoing lines, all wiring positions are inside the end support 10, waterproof and dustproof purposes are achieved through the whole encapsulation silica gel, IP67 even higher protection level can be achieved, the wiring mode of the PCB 8 is adopted, the assembly mode is simple, errors are not easy to occur, automatic production is easy to achieve, and the production efficiency is high.

Meanwhile, the insulating film 6 and the PTC heating sheet may be further installed with insulation cotton 17.

As shown in fig. 2, the PTC heating sheet comprises two PTC sheets 3 electrically connected to a PCB 8, and a plurality of ceramic sheets 4 and a plurality of electrode strips 5 are mounted between the two PTC sheets 3, wherein the mounting manner is that the PTC sheets 3 are coated with silica gel, and the ceramic sheets 4 and the electrode strips 5 are adhered to the PTC sheets 3 through the silica gel;

The ceramic plates 4 and the electrode strips 5 are arranged at intervals, and when the PTC sheet 3 is electrified, heat energy is emitted by the ceramic plates 4 and the electrode strips 5 for heating.

The PTC sheet 3 and the PCB 8 are preferably connected by soldering.

In order to improve the protection level, sealing glue 18 is arranged at the end part between the two PTC sheets 3 for isolation and sealing, and a sealing head 7 is arranged between the PTC heating sheets and the PCB 8, and the PTC sheets 3 penetrate through the sealing head 7.

In order to detect the temperature, the end support 10 is further provided with a mounting cavity 13, a ceramic seat 15 propped against the aluminum tube 1 before pressing and a temperature controller 14 propped against the ceramic seat 15 are mounted in the mounting cavity 13, at this time, the temperature controller 14 is tightly attached to the ceramic seat 15, meanwhile, a fuse is tightly attached to the ceramic seat 15, the ceramic seat 15 is attached to the surface of the aluminum tube 1 before pressing, once PTC overtemperature occurs, the temperature controller 14 and the fuse give related current signals to a control end, so that the control end takes emergency disconnection measures, a high-voltage circuit is protected, and because of quick heat transfer of the ceramic, low-voltage signals are sensitive, and the safety performance is greatly improved.

In order to position the thermostat 14, a fastening screw 16 for locking the thermostat 14 is attached to the head holder 10.

Because the structure is simpler, it is convenient for production technology is more efficient, reliable, simultaneously in order to guarantee IP 67's stability and reliability, the mode that the encapsulating adopted twice to irritate the glue realizes, the first time adopts the encapsulating frock to let the position of pressing preceding aluminum pipe 1 one end, PCB board 8 to sealing washer 9 encapsulate in advance, after the glue solidification, stand up the work piece again, from the space between temperature controller 14 ware and the sealing washer 9, the embedment silica gel, finally wholly solidify again, thereby reach final waterproof target, thereby guarantee that the product can not leak in the use, the product installation is more convenient, safety, reliability.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims

1. A high protection PTC liquid heater, characterized in that: the solar cell comprises a front aluminum tube (1) and a plurality of platform surfaces (2) arranged on the periphery of the front aluminum tube (1), wherein PTC heating plates are respectively assembled on the plurality of platform surfaces (2), insulating films (6) are assembled on the outer sides of the PTC heating plates, a PCB (8) electrically connected with the PTC heating plates is arranged between the front aluminum tube (1) and the insulating films (6) and positioned at one end of the PTC heating plates, and a packing ring (9) is arranged between the front aluminum tube (1) and the insulating films (6) and positioned at one end, far away from the PTC heating plates, of the PCB (8);

An end support (10) is arranged on the outer side of one end of the insulating film (6), a wiring cavity (11) is formed in the end support (10), two high-voltage wires and two low-voltage wires are electrically connected to the PCB (8), the two high-voltage wires and the two low-voltage wires extend to the outer side of the end support (10) through the wiring cavity (11), and a silica gel cover (12) is further arranged in the wiring cavity (11);

The inside of the end support (10) is filled with silica gel.

2. A high protection PTC liquid heater according to claim 1, wherein: the PTC heating plate comprises two PTC plates (3) electrically connected with a PCB (8), and a plurality of ceramic plates (4) and a plurality of electrode strips (5) are arranged between the two PTC plates (3).

3. A high protection PTC liquid heater according to claim 2, wherein: the ceramic plates (4) and the electrode strips (5) are arranged at intervals.

4. A high protection PTC liquid heater according to claim 2, wherein: the ceramic sheet (4) and the electrode strips (5) are adhered to the PTC sheet (3) through silica gel.

5. A high protection PTC liquid heater according to claim 2, wherein: the PTC sheet (3) and the PCB (8) are connected in a soldering way.

6. A high protection PTC liquid heater according to claim 2, wherein: sealing glue (18) is installed at the end between two PTC pieces (3), seal heads (7) are installed between the PTC heating pieces and the PCB (8), and the PTC pieces (3) penetrate through the seal heads (7).

7. A high protection PTC liquid heater according to claim 1, wherein: the end support (10) is also provided with an installation cavity (13), and a ceramic seat (15) propped against the front aluminum pipe (1) and a temperature controller (14) propped against the ceramic seat (15) are arranged in the installation cavity (13).