A battery heating and cooling plate heat exchanger

Abstract

This application relates to a battery heating and cooling plate heat exchanger, which comprises: an upper layer plate, a middle layer plate and a lower layer plate. The four peripheral edges of the upper layer plate and the middle layer plate are respectively welded to the lower layer plate by vacuum brazing. The middle layer plate is provided with a U-shaped heat dissipation channel, and the U-shaped heat dissipation channel is provided with special-shaped fins. The four peripheral edges of the lower layer plate are provided with a number of notches. A number of cylinder holes are respectively provided on the upper layer plate, the middle layer plate and the lower layer plate, and the cylinder holes are used to connect the heat exchanger with an external cylinder. An inlet pipe and an outlet pipe are provided at the bottom of the lower layer plate, and the inlet pipe and the outlet pipe are respectively connected to the special-shaped fins in a communicating manner. The edge of the heat exchanger is vacuum brazed, and the internal U-shaped heat dissipation channel and fins increase the heat exchange and welding area. The notches are provided to connect to a water tray to collect the condensate water of the heat exchanger, and the cylinder holes are provided to connect to a cylinder to enable the heat exchanger to be lifted and lowered smoothly, improving the sealing performance of the pool heat exchanger, increasing the heat exchange area, so as to achieve that the heat exchange fluid will not leak, the heat exchange is more uniform and the heat exchange efficiency is improved, and the pressure resistance is also improved.

Description

Technical Field

[0001] This application relates to the field of heat exchangers, and specifically to a plate heat exchanger for battery heating and cooling. Background Art

[0002] At the current stage of China's economic development, low-carbon economy has become the main direction of China's future development. Against this background, new energy vehicles have emerged as the times require. New energy vehicles have many advantages such as energy conservation, emission reduction, and environmental protection, and also represent the development direction of the world's automotive industry. The core of new energy vehicles is the battery, and the core of the battery lies in the battery charging management system.

[0003] In the battery charging management system, the heat exchanger is an essential system to ensure the normal use of the battery in extremely cold and hot environments. However, the heat exchangers currently used in batteries have problems such as poor sealing, easy leakage of heat exchange fluid, uneven heat exchange, low heat exchange efficiency, and poor pressure resistance. These problems have seriously affected the development of new energy vehicles and therefore need to be solved urgently.

[0004] How to improve the sealing performance of the battery heat exchanger, increase the heat exchange area, so as to achieve that the heat exchange fluid does not leak, the heat exchange is more uniform, and improve the heat exchange efficiency, and also improve the pressure resistance. Summary of the Invention

[0005] The purpose of this application: To improve the sealing performance of the battery heat exchanger, increase the heat exchange area, so as to achieve that the heat exchange fluid does not leak, the heat exchange is more uniform, and improve the heat exchange efficiency, and also improve the pressure resistance.

[0006] The purpose of this application is achieved through the following technical solutions. A plate heat exchanger for battery heating and cooling includes: an upper plate, a middle plate, and a lower plate.

[0007] The peripheries of the upper plate and the middle plate are respectively welded to the lower plate by vacuum brazing.

[0008] The middle plate is provided with a U-shaped heat dissipation channel, and the U-shaped heat dissipation channel is provided with special-shaped fins.

[0009] A number of notches are provided at the peripheries of the lower plate, and the notches are used to connect the heat exchanger to an external water tray.

[0010] A number of cylinder holes are respectively provided on the upper plate, the middle plate, and the lower plate, and the cylinder holes are used to connect the heat exchanger to an external cylinder.

[0011] An inlet pipe and an outlet pipe are provided at the bottom of the lower plate, and the inlet pipe and the outlet pipe are respectively connected to the special-shaped fins in a communicating manner.

[0012] Preferably,

[0013] The sizes of the upper plate and the middle plate are slightly smaller than those of the lower plate.

[0014] Preferably,

[0015] The U-shaped heat dissipation channel is symmetrically arranged relative to the longitudinal axis of the middle layer plate.

[0016] No heat dissipation channel is arranged around the central axis of the middle plate, so that space is reserved for arranging the cylinder hole.

[0017] Preferably,

[0018] The special-shaped fins and the middle plate are welded by vacuum brazing.

[0019] Two through holes corresponding to the inlet pipe and the outlet pipe are provided on the special-shaped fin.

[0020] Preferably,

[0021] The plurality of cylinder holes of the lower plate are a plurality of circular holes of the lower plate,

[0022] A plurality of circular holes of the lower plate are arranged at both ends of the central axis in the length direction of the lower plate;

[0023] The cylinder holes on the middle plate and the upper plate are respectively the middle plate square holes and the upper plate square holes which are arranged corresponding to the circular holes of the lower plate.

[0024] Preferably,

[0025] The square hole of the upper plate is slightly larger than the square hole of the middle plate.

[0026] There are eight circular holes in the lower plate, and each group of four holes is located inside four top corners of the square hole in the middle plate and the square hole in the upper plate.

[0027] Preferably,

[0028] The inlet pipe and the outlet pipe are arranged at a distance staggered in the length direction of the heat exchanger.

[0029] Preferably,

[0030] The special-shaped fin is provided with a plurality of protrusions and depressions, and the plurality of protrusions and depressions are respectively connected.

[0031] Preferably,

[0032] The plurality of protrusions and depressions on the special-shaped fin are arranged at intervals on the front and back surfaces of the special-shaped fin.

[0033] Compared with the prior art, this application has at least the following obvious advantages and effects:

[0034] Vacuum brazing is carried out on the edge of the heat exchanger, a U-shaped heat dissipation channel is arranged inside the heat exchanger, and fins are provided to increase the heat exchange and welding area. A notch is provided to connect the water tray to collect the condensate water of the heat exchanger, and a cylinder hole is provided to connect the cylinder to enable the heat exchanger to lift smoothly, improving the sealing performance of the battery heat exchanger, increasing the heat exchange area, so as to achieve that the heat exchange fluid will not leak, the heat exchange is more uniform and the heat exchange efficiency is improved, and the pressure resistance is also improved. Description of the Drawings

[0035] Figure 1 It is the overall structural layout diagram of the present application.

[0036] Figure 2 It is the top view of the present application.

[0037] Figure 3 It is the bottom view of the present application.

[0038] Figure 4 It is the schematic diagram of the upper plate structure in the present application.

[0039] Figure 5 It is the schematic diagram of the middle plate structure in the present application.

[0040] Figure 6 It is the schematic diagram of the fin structure in the present application.

[0041] Figure 7 It is the side view of one side of the present application.

[0042] Component List in the Present Application

[0043] Detailed Description of the Invention

[0044] Specific embodiments of the present application are described in conjunction with the drawings and the following description to teach those skilled in the art how to make and use the best mode of the present application. For the purpose of teaching the principles of the application, some conventional aspects have been simplified or omitted. Those skilled in the art should understand that the variations derived from these embodiments fall within the scope of the present application. Those skilled in the art should understand that the following features can be combined in various ways to form multiple variations of the present application. Terms such as "upper", "lower", "left", "right", "middle" and "one" cited in the present application are only for the convenience of clear narration, rather than used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention. Thus, the present application is not limited to the specific embodiments described below, but is defined only by the claims and their equivalents.

[0045] Figures 1 to 7 It shows a specific embodiment of the battery heating and cooling plate heat exchanger of the present application.

[0046] A battery heating and cooling plate heat exchanger, which comprises: an upper plate 1, a middle plate 2 and a lower plate 3. The four peripheral edges of the upper plate 1 and the middle plate 2 are respectively welded to the lower plate 3 by vacuum brazing. A U-shaped heat dissipation channel 22 is provided on the middle plate 2, and a special-shaped fin 23 is provided in the U-shaped heat dissipation channel 22. A number of notches 34 are provided at the four peripheral edges of the lower plate 3. A number of cylinder holes 4 are respectively provided on the upper plate 1, the middle plate 2 and the lower plate 3. The cylinder holes 4 are used to connect the heat exchanger 100 to an external cylinder. An inlet pipe 32 and an outlet pipe 33 are provided at the bottom of the lower plate 3. The inlet pipe 32 and the outlet pipe 33 are respectively connected to the special-shaped fin 23 in a communicating manner. The edge of the heat exchanger 100 is vacuum brazed, and the U-shaped heat dissipation channel 22 and the fins 23 are arranged inside to increase the heat exchange and welding area. The notches 34 are provided to connect to a water tray to collect the condensate of the heat exchanger, and the cylinder holes 4 are provided to connect to a cylinder to enable the heat exchanger to lift smoothly, improving the sealing performance of the battery heat exchanger 100, increasing the heat exchange area, so as to ensure that the heat exchange fluid will not leak, the heat exchange is more uniform and the heat exchange efficiency is improved, and the pressure resistance is also improved.

[0047] It should be noted that, as Figures 1 to 5 shown, in the embodiment of the present application,

[0048] In order to improve the sealing performance of the heat exchanger 100 and prevent the heat exchange fluid in the heat exchanger 100 from leaking: the four peripheral edges of the upper plate 1 and the middle plate 2 of the heat exchanger 100 are respectively welded to the lower plate 3 by vacuum brazing, increasing the sealing performance of the edge of the heat exchanger 100 and preventing the heat exchange fluid in the heat exchanger 100 from leaking from the edge;

[0049] In addition, a U-shaped heat dissipation channel 22 is provided on the middle plate 2, and a special-shaped fin 23 is provided in the U-shaped heat dissipation channel 22. The U-shaped heat dissipation channel 22 can increase the flow path of the heat dissipation fluid, and cooperate with the special-shaped fin 23 to jointly increase the heat exchange area of the heat exchanger 100 and improve the heat exchange efficiency;

[0050] In order to prevent the condensate of the heat exchanger 100 from dripping: a number of notches 34 are provided at the four peripheral edges of the lower plate 3 of the heat exchanger 100, and a water tray can be externally connected to the heat exchanger through the notches 34 to catch the dripping condensate;

[0051] In addition, in order to enable the heat exchanger 100 to lift smoothly during use, a number of cylinder holes 4 are respectively provided on the upper plate 1, the middle plate 2 and the lower plate 3. Subsequently, during use, the heat exchanger 100 can be connected to an external cylinder through the cylinder holes 4 to ensure that the heat exchanger 100 can lift smoothly during use;

[0052] An inlet pipe 32 and an outlet pipe 33 are provided at the bottom of the lower plate 3 of the heat exchanger 100. The inlet pipe 32 and the outlet pipe 33 are respectively connected to the special-shaped fin 23 in a communicating manner to ensure that the heat dissipation fluid can enter the heat dissipation channel and achieve the heat dissipation effect.

[0053] It should be noted that, as Figure 2 and 7 shown, in the embodiment of the present application,

[0054] Furthermore, in order to ensure that the heat exchange fluid of the heat exchanger 100 does not leak, the notch 34 for reserving the installation water tray of the heat exchanger 100 is arranged outside the welding point to ensure the normal use of the notch 34. During production, the sizes of the upper layer plate 1 and the middle layer plate 2 of the heat exchanger 100 are designed to be slightly smaller than the lower layer plate 3. When welding, the welding points of the upper layer plate 1 and the middle layer plate 2 are on the plate surface of the lower layer plate 3, rather than at the edge of the lower layer plate 3, making the welding more airtight, further preventing the leakage of the heat exchange fluid, and not blocking the notch 34, which affects the installation of the water tray.

[0055] It also should be noted that, as Figure 1 、 2 and 5 shown, in the embodiment of the present application,

[0056] As is well known to the public, the longer the heat dissipation process of the radiator is, the larger the contact area of the heat dissipation fluid is, which can effectively improve the heat dissipation efficiency. Therefore, in order to increase the heat exchange process of the heat exchanger 100 and improve the heat exchange efficiency, the U-shaped heat dissipation channel 22 is symmetrically arranged with respect to the central axis of the length direction of the middle layer plate 2, so that the fluid flows in from one end of the U-shaped heat dissipation channel 22 and flows out from the other end. The heat exchange fluid circulates around the heat exchanger 100 for one circle to conduct heat exchange, and there is a certain distance between the U-shaped heat dissipation channel 22 and the outer edge of the middle layer plate 2 to reserve a welding space for the middle layer plate 2;

[0057] In addition, in order to improve the stability of the heat exchanger 100 during use, a cylinder hole 4 is provided on the heat exchanger 100 to reserve an installation point for an external cylinder. Therefore, no heat dissipation channels are arranged around the central axis of the middle layer plate 2 to reserve space for setting the cylinder hole 4.

[0058] It should be explained that, as Figure 1 shown, in the embodiment of the present application,

[0059] Since the heat exchange fluid realizes heat dissipation by flowing through the special-shaped fins 23 in the U-shaped heat dissipation channel 22, in order to strengthen the connection strength between the special-shaped fins 23 and the heat exchanger 100, the special-shaped fins 23 and the middle layer plate 2 are welded by vacuum brazing, and two through holes 231 corresponding to the inlet pipe 32 and the outlet pipe 33 are opened on the special-shaped fins 23, so that the heat exchange fluid enters and exits the special-shaped fins 23 through the through holes 231 to realize the heat dissipation of the heat exchanger 100.

[0060] It also should be explained that, as Figures 1 to 5 shown, in the embodiment of the present application,

[0061] To ensure the stable lifting of the heat exchanger 100, a number of cylinder holes 4 are provided on the heat exchanger 100, and cylinders can be connected outside the heat exchanger 100. Since the connecting part of a cylinder is usually cylindrical, a number of the cylinder holes 4 on the lower layer plate 3 are set as a number of lower layer plate round holes 31. The number of lower layer plate round holes 31 is arranged at both ends of the central axis in the length direction of the lower layer plate 3, so that the connection points between the heat exchanger 100 and the external cylinders are located at both ends in the length direction of the heat exchanger 100, making the lifting more stable from both ends. On the other hand, a heat dissipation channel is provided on the middle layer plate 2. To avoid fluid leakage caused by the cylinder holes 4 being arranged on the heat dissipation channel, the lower layer plate round holes 31 can only be arranged at both ends of the central axis in the length direction of the lower layer plate 3 to ensure that the cylinder holes 4 on the middle layer plate 2 do not pass through the fins 23;

[0062] Meanwhile, to facilitate the installation of the cylinders and ensure better correspondence of the cylinder holes 4 on the upper layer plate 1, the middle layer plate 2, and the lower layer plate 3, the cylinder holes 4 on the middle layer plate 2 and the upper layer plate 1 are respectively set as middle layer plate square holes 21 and upper layer plate square holes 11, and are arranged corresponding to the lower layer plate round holes 31.

[0063] Further, it should be noted that, as Figures 1 to 5 shown, in the embodiment of the present application,

[0064] Furthermore, to ensure better correspondence of the cylinder holes 4 on the upper layer plate 1, the middle layer plate 2, and the lower layer plate 3, the size of the upper layer plate square hole 11 is designed to be slightly larger than that of the middle layer plate square hole 21 to ensure that the middle layer plate square hole 21 is located inside the upper layer plate square hole 11;

[0065] According to the shape and size design of the existing cylinder connection components, the cylinder holes 4 on the lower layer plate 3 are eight lower layer plate round holes (31), and every four form a group and are respectively located inside the four top corners of the middle layer plate square hole 21 and the upper layer plate square hole 11, ensuring that the lower layer plate round holes (31) are located inside the middle layer plate square hole 21 and the upper layer plate square hole 11, so that the cylinder holes 4 on the lower layer plate 3 are not blocked by the upper layer plate 1 and the middle layer plate 2, resulting in the inability to install the cylinders.

[0066] It should also be noted that, as Figure 3 shown, in the embodiment of the present application,

[0067] To ensure that the installation of the heat exchange fluid inlet and outlet pipes of the heat exchanger 100 does not block each other, the inlet pipe 32 and the outlet pipe 33 are arranged with a distance offset in the length direction of the heat exchanger 100, so that the inlet and outlet pipes do not cross, facilitating installation.

[0068] It should be noted that, as Figure 6 shown, in the embodiment of the present application,

[0069] In order to increase the heat exchange area and the welding area of the heat exchanger 100, a number of protrusions and depressions are provided on the special-shaped fins 23 of the heat exchanger 100. The a number of protrusions and depressions are respectively connected. The fluid flows through the heat exchanger 100 through the connected protrusions and depressions, and the heat exchange efficiency is improved by increasing the contact area. In addition, the a number of protrusions increase the welding area between the middle layer plate 2, the upper layer plate 1 and the lower layer plate 3, ensuring the pressure resistance of the heat exchanger 100.

[0070] It should also be noted that, as Figure 6 shown, in the embodiment of the present application,

[0071] In order to ensure that the fluid can flow evenly through the heat exchanger 100, a number of protrusions and depressions on the special-shaped fins 23 are arranged at intervals on the front and back sides of the special-shaped fins 23, so that the heat exchange fluid can flow evenly on the middle layer plate 2, making the heat exchange of the heat exchanger 100 more uniform.

[0072] It should also be noted that, in the embodiment of the present application,

[0073] The upper layer plate 1, the middle layer plate 2 and the lower layer plate 3 of the heat exchanger 100 are all designed as planes, and the overall flatness of the heat exchanger 100 is better after welding.

[0074] Since those skilled in the art can easily think that any modifications, equivalent replacements, improvements, etc. made within the concept and principle of the application should be included within the scope of the claims of the present application.

Claims

1. A battery heating and cooling plate heat exchanger, characterized in that, Including: An upper plate (1), a middle plate (2) and a lower plate (3), The four peripheral edges of the upper plate (1) and the middle plate (2) are respectively welded to the lower plate (3) by vacuum brazing; A U-shaped heat dissipation channel (22) is provided on the middle plate (2), and a special-shaped fin (23) is provided in the U-shaped heat dissipation channel (22); A plurality of notches (34) are provided at the four peripheral edges of the lower plate (3), and the notches (34) are used to connect the heat exchanger (100) with an external water tray; A plurality of cylinder holes (4) are respectively provided on the upper plate (1), the middle plate (2) and the lower plate (3), The cylinder holes (4) are used to connect the heat exchanger (100) with an external cylinder; An inlet pipe (32) and an outlet pipe (33) are provided at the bottom of the lower plate (3), and the inlet pipe (32) and the outlet pipe (33) are respectively connected to the special-shaped fin (23) in a communicating manner; The sizes of the upper plate (1) and the middle plate (2) are slightly smaller than those of the lower plate (3); The notch (34) for the heat exchanger to reserve for installing an external water tray is arranged outside the welding point. When welding, the welding points of the upper plate (1) and the middle plate (2) are on the plate surface of the lower plate (3), rather than at the edge of the lower plate (3). No heat dissipation channels are provided around the central axis of the middle plate (2), so as to reserve space for arranging the cylinder holes (4).

2. The battery heating and cooling plate heat exchanger according to claim 1, characterized in that: The special-shaped fin (23) is welded to the middle plate (2) by vacuum brazing, Two through holes (231) corresponding to the inlet pipe (32) and the outlet pipe (33) are provided on the special-shaped fin (23).

3. The battery heating and cooling plate heat exchanger according to claim 1, characterized in that: The plurality of cylinder holes (4) of the lower plate (3) are a plurality of lower plate round holes (31), The plurality of lower plate round holes (31) are arranged at both ends of the central axis in the length direction of the lower plate (3); The cylinder holes (4) on the middle plate (2) and the upper plate (1) are a middle plate square hole (21) and an upper plate square hole (11) respectively provided corresponding to the lower plate round holes (31).

4. The battery heating and cooling plate heat exchanger according to claim 3, wherein: The upper plate square hole (11) is slightly larger than the middle plate square hole (21), The plurality of lower plate round holes (31) are eight, and every four form a group and are respectively located inside the four top corners of the middle plate square hole (21) and the upper plate square hole (11).

5. The battery heating and cooling plate heat exchanger according to claim 1, wherein: The inlet pipe (32) and the outlet pipe (33) are arranged at a staggered distance in the length direction of the heat exchanger (100).

6. The battery heating and cooling plate heat exchanger according to claim 1, wherein: A plurality of protrusions and depressions are provided on the special-shaped fin (23), and the plurality of protrusions and depressions are respectively communicated.

7. The battery heating and cooling plate heat exchanger according to claim 6, characterized in that: The plurality of protrusions and depressions on the special-shaped fin (23) are arranged at intervals on the front and back sides of the special-shaped fin (23).

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