Round-tube-shaped automobile battery thick film heater

Abstract

The utility model relates to the technical field of new energy automobile battery heating equipment, in particular to a thick film heater for a circular tube-shaped automobile battery. The thick film heater comprises a shell, a water inlet pipe, a water outlet pipe, a heat conduction pipe and two end covers. Wherein the two ends of the shell are each provided with a first installation opening, the two first installation openings are sealed by the two end covers respectively, and the water inlet pipe and the water outlet pipe are arranged on the two end covers respectively. The heat conduction pipe is installed in the shell, two ends of the heat conduction pipe are communicated with the water inlet pipe and the water outlet pipe respectively, and the thick film circuit is arranged on the outer wall of the heat conduction pipe. The bottom cover, the shell, the heat conduction pipe and the two end covers jointly define a closed containing space. Due to the fact that the overall structural stability of the heat conduction pipe is good, multi-layer printing and multiple high-temperature sintering can be integrally carried out. And compared with two thick film heating plates, the frequency of processing the thick film circuit is saved, so that the cost is reduced. In addition, the overall waterproof performance is better, and the requirement for the waterproof performance in the use environment of the new energy automobile can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicle battery heating equipment, and particularly relates to a tubular thick film heater for vehicle batteries. Background Art

[0002] In recent years, China has been accelerating the transformation of vehicle electrification. The production and sales volume of new energy vehicles have been expanding continuously, driving the growth of the demand for the thermal management system. The batteries of new energy vehicles need to be temperature-managed to ensure the normal operation of the entire vehicle system at an appropriate temperature. At present, thick film heaters have been used to heat the batteries of new energy vehicles.

[0003] A thick film heater for vehicle batteries (Publication No.: CN220733037U) is disclosed in the prior art. The thick film heater includes a first thick film heating plate, a second thick film heating plate and a frame. The outer perimeters of the first thick film heating plate and the second thick film heating plate are respectively welded to the top and the bottom of the frame. The heater heats the water inside through two thick film heating plates, and the heated water is output through a water pipe to heat the battery through the hot water.

[0004] Although the existing thick film heaters for vehicle batteries can heat vehicle batteries, there are still some problems. First, the existing thick film heaters use two rectangular thick film heating plates for heating. Since the thick film heating plates need continuous multi-layer printing and multiple high-temperature sintering during the manufacturing process, it is difficult to process and cut a single large thick film heating plate into smaller single thick film heating plates. If a single large thick film heating plate is processed, the large plate will have a large deformation after the high-temperature sintering process, resulting in a deviation in the thickness of the next printing layer, and causing unstable line resistance or even inability to print on the heating plate. This makes the two thick film heating plates can only be printed in multiple layers and sintered at high temperature separately, greatly increasing the cost and making the overall cost of the thick film heater relatively high. Second, the overall sealing performance of the existing thick film heaters is poor, and it is difficult to meet the waterproof requirements in the use environment of vehicles. Content of the Utility Model

[0005] Aiming at the above defects, the technical problem to be solved by the utility model is to provide a tubular thick film heater for vehicle batteries, and the structure of the thick film heater can reduce the cost and improve the sealing performance inside the thick film heater.

[0006] The above technical purpose of the utility model is achieved by the following technical solutions:

[0007] A tubular thick film heater for vehicle batteries, comprising:

[0008] A housing, with first mounting openings provided at both ends of the housing;

[0009] Two end caps, which correspond to the first mounting openings one by one and are fixed to the corresponding ends of the housing;

[0010] A water inlet pipe and a water outlet pipe, which are respectively arranged on the two end caps;

[0011] A heat conduction pipe, which is installed in the housing, and both ends of the heat conduction pipe are respectively communicated with the water inlet pipe and the water outlet pipe. The housing, the heat conduction pipe and the two end caps jointly enclose a closed accommodation space;

[0012] A thick film circuit, which is arranged on the outer wall of the heat conduction pipe.

[0013] By adopting the above scheme, since the heat conduction pipe is tubular as a whole, the overall structural stability of the heat conduction pipe is good. When processing the thick film circuit on the heat conduction pipe, multi-layer printing and multiple high-temperature sintering can be carried out as a whole. Compared with setting two thick film heating plates, the number of times of processing the thick film circuit is saved, thereby reducing the cost. In addition, since the overall sealing performance of the heat conduction pipe is better, the water inside the heat conduction pipe will not enter between the housing and the heat conduction pipe; and the bottom cover, the housing, the heat conduction pipe and the two end caps jointly enclose a closed accommodation space, which makes the space between the heat conduction pipe and the housing sealed, so that the water outside the housing is difficult to enter the inside, effectively improving the waterproof performance and meeting the requirements for waterproof performance in the use environment of an automobile.

[0014] The utility model is further arranged such that a circuit board is fixedly connected in the accommodation space, the circuit board is connected to the thick film circuit, and a chip is connected to the circuit board. Since the circuit board, the chip and the heat conduction pipe are all installed in the sealed accommodation space, the circuit board, the chip and the thick film circuit are protected, preventing water from seeping into the inside and damaging the charged components in the accommodation space, and improving the working stability of the thick film heater.

[0015] The utility model is further arranged such that a second mounting opening is formed at the bottom of the housing, and a bottom cover is detachably connected to the second mounting opening, and the bottom cover closes the second mounting opening. During assembly, after the circuit board is installed in the accommodation space, the bottom cover is covered and the two are bonded together with a sealant, which is convenient for the installation of the circuit board.

[0016] The utility model is further configured such that a water tank is provided between the water inlet pipe and the heat conduction pipe. The water inlet pipe and the heat conduction pipe are both communicated with the water tank, and the outer wall of the water tank is in contact with the chip. Since the chip generates a large amount of heat during operation, in order to ensure the stability and energy saving of its operation, the cold water entering the water tank through the water inlet pipe cools the chip, thereby ensuring the stability of the chip operation. Moreover, since the chip transfers heat to the water tank, and then to the water in the water tank, the water is preheated, reducing the energy consumption of the thick film heater and improving the energy saving performance.

[0017] The utility model is further configured such that an elastic member is fixedly connected inside the housing. The free end of the elastic member abuts against one side of the chip, causing the chip to abut against the outer wall of the water tank. The elastic member enables the chip to better fit against the outer wall of the water tank, thereby ensuring the stability of heat transfer between the chip and the water tank.

[0018] The utility model is further configured such that the shape of the outer wall of the water tank near the chip side matches the shape of the chip surface and fits against the chip surface. Since the shape of the outer wall of the water tank near the chip side matches the shape of the chip surface and fits against the chip surface, there is a large heat transfer area between the water tank and the chip, improving the heat transfer efficiency and thus enhancing the cooling effect on the chip.

[0019] The utility model is further configured such that a heat insulation board is fixedly connected in the accommodation space, and the heat insulation board is located between the circuit board and the heat conduction pipe. Since the thick film circuit provided outside the heat conduction pipe generates a large amount of heat during operation, in order to reduce the impact on the circuit board, the circuit board and the heat conduction pipe are separated by the heat insulation board to block part of the heat from being transferred to the circuit board.

[0020] The utility model is further configured such that a third installation port communicating with the accommodation space is opened on the housing, and a socket is installed in the third installation port. The socket is connected to the circuit board through a wire. The socket facilitates connection to the control circuit of the vehicle.

[0021] The utility model is further configured such that the end cover and the corresponding first installation port are sealed with sealant. The sealant enhances the sealing performance between the end cover and the first installation port, improving the waterproof performance.

[0022] The utility model is further configured such that the water inlet pipe and the water outlet pipe are welded to the corresponding end covers. The welding connection of the water inlet pipe and the water outlet pipe to the corresponding end covers enhances the overall stability and sealing performance.

[0023] In summary, a tubular automotive battery thick film heater provided by the utility model has at least the following beneficial effects:

[0024] 1. The waterproof performance of the thick film heater is improved.

[0025] 2. The manufacturing cost of the thick film heating plate of the thick film heater is reduced, thereby reducing the cost of the whole thick film heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0028] Figure 2 is an exploded view of the present invention;

[0029] Figure 3 is a right view of the present invention;

[0030] Figure 4 is Figure 3 a cross-sectional view taken along line A-A in (where the direction of the water flow is indicated by an arrow);

[0031] Figure 5 is a three-dimensional structural schematic diagram of the housing of the present invention from a top-down perspective;

[0032] Figure 6 is a three-dimensional structural schematic diagram of the housing of the present invention from a bottom-up perspective.

[0033] The reference numerals include: 1. Housing, 2. First mounting port, 3. Second mounting port, 4. Third mounting port, 5. End cover, 6. Water inlet pipe, 7. Water outlet pipe, 8. Heat conduction pipe, 9. Thick film circuit, 10. Circuit board, 11. Chip, 12. Bottom cover, 13. Water tank, 14. Elastic member, 15. Heat insulation plate, 16. Socket, 17. Sealant. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will further describe the present invention in detail in conjunction with the Figures 1-6 drawings and specific embodiments.

[0035] Please refer to Figures 1-6, a tubular automotive battery thick film heater provided in this embodiment includes a housing 1, a water inlet pipe 6, a water outlet pipe 7, a heat conduction pipe 8, a thick film circuit 9, and two end caps 5. Among them, first mounting openings 2 are provided at both the left and right ends of the housing 1. The end caps 5 correspond to the first mounting openings 2 one by one and are fixed to the corresponding ends of the housing 1. The two end caps 5 respectively seal the two first mounting openings 2. The water inlet pipe 6 and the water outlet pipe 7 are respectively arranged in the middle parts of the two end caps 5. Specifically, the water inlet pipe 6 is arranged on the right end cap 5, and the water outlet pipe 7 is arranged on the left end cap 5. The heat conduction pipe 8 is installed inside the housing 1, and the thick film circuit 9 is arranged on the outer wall of the heat conduction pipe 8. The heat conduction pipe 8 can be heated through the thick film circuit 9. Both ends of the heat conduction pipe 8 are respectively communicated with the water inlet pipe 6 and the water outlet pipe 7. The bottom cover 12, the housing 1, the heat conduction pipe 8, and the two end caps 5 jointly enclose a closed accommodation space. In this embodiment, it is preferred that the heat conduction pipe 8 is a circular pipe, and the heat conduction pipe 8 can specifically be a stainless steel pipe.

[0036] By adopting the above scheme, since the heat conduction pipe 8 is tubular as a whole, the overall structural symmetry of the heat conduction pipe 8 is good, and the deformation after high-temperature sintering is small. When processing the thick film circuit 9 on the heat conduction pipe 8, multi-layer printing and multiple high-temperature sintering can be carried out as a whole. Compared with setting two thick film heating plates, the number of times of processing the thick film circuit 9 is saved, thereby reducing the cost. In addition, since the overall sealing performance of the heat conduction pipe 8 is better, the water inside the heat conduction pipe 8 will not enter between the housing 1 and the heat conduction pipe 8; and the bottom cover 12, the housing 1, the heat conduction pipe 8, and the two end caps 5 jointly enclose a closed accommodation space, which makes the space between the heat conduction pipe 8 and the housing 1 sealed, so that the water outside the housing 1 is difficult to enter the inside, effectively improving the waterproof performance and being able to meet the requirements for waterproof performance in the use environment of new energy vehicles.

[0037] Please refer to Figure 2 and Figure 4 , in order to facilitate the control of the thick film circuit 9, further, a circuit board 10 is fixedly connected in the accommodation space. The circuit board 10 is connected to the thick film circuit 9 through a circuit. A chip 11 is connected to the circuit board 10. The chip 11 can specifically be an IGBT chip. The circuit board 10 is located below the circuit board 10, and the chip 11 is located on the lower side of the water tank 13. In order to facilitate the installation of the circuit board 10 and the chip 11, a second mounting opening 3 is provided at the bottom of the housing 1. A bottom cover 12 is detachably connected at the second mounting opening 3, and the bottom cover 12 seals the second mounting opening 3. The bottom cover 12 and the housing 1 can be bonded through a sealant 17. By removing the bottom cover 12, it is convenient to repair or remove the circuit board 10 and the chip 11. And the sealant 17 also further enhances the sealing performance between the bottom cover 12 and the housing 1 and enhances the waterproof performance between the bottom cover 12 and the housing 1.

[0038] Please continue to refer to Figure 4, since the chip 11 generates a lot of heat during operation, in order to ensure its operating stability and energy conservation, further, a water tank 13 is provided between the water inlet pipe 6 and the heat conduction pipe 8. Both the water inlet pipe 6 and the heat conduction pipe 8 are communicated with the water tank 13, and the outer wall of the water tank 13 is in contact with the chip 11. During operation, cold water enters the water tank 13 from the water inlet pipe 6, then enters the heat conduction pipe 8 for heating, and finally hot water is output outward from the water outlet pipe 7. The cold water entering the water tank 13 through the water inlet pipe 6 cools the chip 11, thereby ensuring the operating stability of the chip 11. Moreover, since the chip 11 transfers heat to the water tank 13, and then to the water in the water tank 13, thereby preheating the water, the energy consumption of the thick film heater is reduced and the energy conservation performance is improved.

[0039] Please continue to refer to Figure 4 , in order to improve the heat transfer stability and heat transfer efficiency between the chip 11 and the water tank 13, further, an elastic member 14 is fixedly connected inside the housing 1. The free end of the elastic member 14 abuts against one side of the chip 11, and makes the chip 11 abut against the outer wall of the water tank 13. Specifically, the elastic member 14 is fixedly connected to the housing 1. The elastic member 14 is located below the chip 11, and the free end of the elastic member 14 abuts against the chip 11 upward, and makes the chip 11 abut against the outer wall of the water tank 13 upward. The upper side of the chip 11 is close to the water tank 13, and the shape of the outer wall of the water tank 13 close to the chip 11 side matches the shape of the surface of the chip 11 and fits with the surface of the chip 11. The upper side of the chip 11 in this embodiment is a plane. Correspondingly, the lower side of the water tank 13 is a plane and fits with the plane on the upper side of the chip 11.

[0040] Please refer to Figure 4 and Figure 6 , since the thick film circuit 9 provided outside the heat conduction pipe 8 generates a lot of heat during operation, in order to reduce the influence on the circuit board 10, further, a heat insulation plate 15 is fixedly connected in the accommodation space. The heat insulation plate 15 is located between the circuit board 10 and the heat conduction pipe 8. Specifically, the heat insulation plate 15 is integrally formed with the housing 1. There is a gap between the right end of the heat insulation plate 15 and the water tank 13, so as to facilitate the contact between the water tank 13 and the chip 11, and the connection of the circuit of the circuit board 10 to the thick film circuit 9.

[0041] Please refer to Figure 1 , Figure 5 and Figure 6 , in order to facilitate the connection of the control circuit of the vehicle to the circuit board 10, further, a third installation port 4 communicating with the accommodation space is opened on the housing 1. A socket 16 is installed in the third installation port 4. The socket 16 is connected to the circuit board 10 through a circuit. Specifically, two third installation ports 4 are opened on the left side of the housing 1, and a socket 16 is installed in each third installation port 4.

[0042] Please continue to refer to Figure 4, in order to improve the waterproof performance, the end cap 5 and the corresponding first mounting opening 2 are sealed by a sealant 17. The water inlet pipe 6 and the water outlet pipe 7 are welded to the corresponding end cap 5, and the end cap 5 is connected to the housing 1 by bolts. During assembly, the first end cap 5 and the water inlet pipe 6 are first welded together, the heat conduction pipe 8 is sequentially passed through the two first mounting openings 2 from right to left, a sealant 17 is provided between the first end cap 5 and the corresponding first mounting opening 2 on the housing 1, and then the first end cap 5 is fixed. Then, the second end cap 5 is fixedly connected to the housing 1, and a sealant 17 is provided between the second end cap 5 and the corresponding first mounting opening 2. The sealant 17 is arranged in a circle along the circumference of the first mounting opening 2, and the second end cap 5 is welded to the water outlet pipe 7.

[0043] It should be noted that the words indicating directions in this article, such as up and down, etc., are all set in the Figure 1 direction for the convenience of description only and have no other specific meanings.

[0044] It should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the article or device including the above elements.

[0045] Specific examples are used in this article to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A cylindrical thick film heater for automobile batteries, characterized in that: include: A shell (1), wherein both ends of the shell (1) are provided with a first installation opening (2); two end covers (5), the end covers (5) corresponding one to one with the first mounting openings (2) and fixed to corresponding ends of the housing (1); A water inlet pipe (6) and a water outlet pipe (7), wherein the water inlet pipe (6) and the water outlet pipe (7) are respectively arranged on the two end covers (5); A heat conducting pipe (8), the heat conducting pipe (8) being installed in the shell (1), the two ends of the heat conducting pipe (8) being respectively connected to the water inlet pipe (6) and the water outlet pipe (7), and the shell (1), the heat conducting pipe (8) and the two end covers (5) together enclose a closed accommodation space; A thick film circuit (9), wherein the thick film circuit (9) is arranged on the outer wall of the heat conducting tube (8).

2. A tubular automotive battery thick film heater as claimed in claim 1, characterized in that: A circuit board (10) is fixedly connected in the accommodating space, the circuit board (10) is connected to the thick film circuit (9), and a chip (11) is connected to the circuit board (10).

3. A tubular automobile battery thick film heater as claimed in claim 2, characterized in that: The bottom of the housing (1) is provided with a second installation opening (3), and a bottom cover (12) is detachably connected to the second installation opening (3), and the bottom cover (12) closes the second installation opening (3).

4. A tubular automobile battery thick film heater as claimed in claim 2, characterized in that: A water tank (13) is provided between the water inlet pipe (6) and the heat conducting pipe (8); the water inlet pipe (6) and the heat conducting pipe (8) are both connected to the water tank (13); and the outer wall of the water tank (13) is in contact with the chip (11).

5. A tubular automobile battery thick film heater as claimed in claim 4, characterized in that: An elastic member (14) is fixedly connected inside the shell (1), and a free end of the elastic member (14) abuts against one side of the chip (11), so that the chip (11) abuts against the outer wall of the water tank (13).

6. A tubular automobile battery thick film heater as claimed in claim 5, characterized in that: The shape of the outer wall of the water tank (13) on the side close to the chip (11) matches the shape of the surface of the chip (11) and fits the surface of the chip (11).

7. A tubular automotive battery thick film heater as claimed in any one of claims 2 to 6, characterized in that: A heat insulation board (15) is fixedly connected in the accommodating space, and the heat insulation board (15) is located between the circuit board (10) and the heat conducting pipe (8).

8. A round tubular automobile battery thick film heater as claimed in claim 7, characterized in that: The housing (1) is provided with a third installation opening (4) which is in communication with the accommodating space. A socket (16) is installed in the third installation opening (4). The socket (16) is connected to the circuit board (10) via a line.

9. A tubular automobile battery thick film heater as claimed in claim 1, characterized in that: The end cover (5) and the corresponding first mounting opening (2) are sealed by means of a sealant (17).

10. A tubular automobile battery thick film heater as claimed in claim 1, characterized in that: The water inlet pipe (6) and the water outlet pipe (7) are connected to the corresponding end covers (5) by welding.

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