cooling device

Abstract

A cooling device, comprising a communication part, the communication part comprising a refrigerant communication part and a coolant communication part, the refrigerant communication part and the coolant communication part are arranged alternately, and a vehicle-mounted battery can be located on one surface of the communication part; the cooling device can balance and reduce the thermal inertia difference by using the characteristics of the refrigerant and the coolant respectively, such as rapid cooling of the refrigerant, beneficial rapid discharge cooling, and the coolant can reduce the surface temperature difference of the cold plate, so that the temperature of the cooling device is more uniform, thereby promoting the temperature uniformity of the battery; after parking, the battery is cooled by the coolant to keep the battery temperature constant.

Description

Technical Field

[0001] This invention relates to an on-board battery cooling device. Background Technology

[0002] Hybrid vehicles and electric vehicles are equipped with onboard batteries that supply power to the motors that serve as the drive source. In order to ensure the normal operation of the onboard batteries, they need to be kept within a certain temperature range. The heat of the batteries can be removed by cooling devices. How to make the temperature of the cooling devices more uniform, thereby promoting the temperature uniformity of the batteries, is a technical problem. Summary of the Invention

[0003] The purpose of this application is to provide a cooling device that can improve the temperature uniformity of the cooling device.

[0004] To achieve the above objectives, this application adopts the following technical solution: a cooling device capable of cooling an on-board battery, the cooling device comprising a first manifold assembly, a second manifold assembly, and a connecting portion, the connecting portion comprising a refrigerant connecting portion and a coolant connecting portion, the first manifold assembly comprising a first manifold and a second manifold, the refrigerant connecting portion being located between the first manifold and the second manifold, the first manifold and the second manifold being connected through the refrigerant connecting portion, the second manifold assembly comprising a third manifold and a fourth manifold, the coolant connecting portion being located between the third manifold and the fourth manifold, the third manifold and the fourth manifold being connected through the refrigerant connecting portion. The refrigerant connection and the coolant connection are arranged alternately side by side. The first manifold and the third manifold are located on the same side of the connection. The third manifold and the fourth manifold are located on the same side of the connection. The refrigerant connection includes multiple first channels arranged side by side. The coolant connection includes multiple second channels arranged side by side. The flow area of ​​the first channels is smaller than that of the second channels. The number of first channels is greater than the number of second channels. The second channels are connected to the third manifold and the fourth manifold. The first channels are connected to the first manifold and the second manifold.

[0005] In this application, the cooling device includes a connecting portion, which comprises a refrigerant connecting portion and a coolant connecting portion, which are arranged alternately. The vehicle battery can be located on one surface of the connecting portion. The cooling device can utilize the characteristics of the refrigerant and coolant to balance and address differences in thermal inertia. For example, the refrigerant cools down rapidly, which is beneficial for rapid discharge cooling, while the coolant can reduce the temperature difference on the surface of the cold plate due to thermal inertia, making the temperature of the cooling device more uniform and thus promoting the temperature uniformity of the battery. After parking, the battery is cooled by the coolant to maintain a constant battery temperature. Attached Figure Description

[0006] Figure 1 This is a three-dimensional structural diagram of a first embodiment of the cooling device;

[0007] Figure 2 yes Figure 1 A front view schematic diagram of the cooling device;

[0008] Figure 3 yes Figure 2 A schematic diagram of the AA cross-section structure of the cooling device;

[0009] Figure 4 yes Figure 1 A top view of the cooling device;

[0010] Figure 5 yes Figure 4 A partial structural schematic diagram of the BB section of the cooling device;

[0011] Figure 6 yes Figure 1 A three-dimensional structural diagram of the connecting part of the intermediate cooling device;

[0012] Figure 7 yes Figure 6 A partially enlarged structural diagram of section C, the connecting part;

[0013] Figure 8 This is a three-dimensional structural diagram of a second embodiment of the cooling device;

[0014] Figure 9 yes Figure 8 A partial structural schematic diagram of the main view of the cooling device;

[0015] Figure 10 yes Figure 9 A schematic diagram of the EE cross-section structure of the cooling device;

[0016] Figure 11 yes Figure 8 A schematic diagram of the cooling device removing the first and third manifolds from one perspective;

[0017] Figure 12 yes Figure 8 A partially enlarged schematic diagram of the cooling device removing the first and third manifolds from another perspective;

[0018] Figure 13 yes Figure 12 A partially enlarged structural diagram;

[0019] Figure 14 yes Figure 8A schematic diagram of the structure of the first and third manifolds of the cooling device from one perspective;

[0020] Figure 15 yes Figure 14 A partially enlarged structural diagram;

[0021] Figure 16 This is a three-dimensional structural diagram of a third embodiment of the cooling device;

[0022] Figure 17 yes Figure 16 A top view of the cooling device;

[0023] Figure 18 yes Figure 17 A schematic diagram of the II section structure of the cooling device;

[0024] Figure 19 yes Figure 16 A three-dimensional structural diagram of the connecting part of the intermediate cooling device;

[0025] Figure 20 yes Figure 19 A partially enlarged structural diagram of the H section of the connecting part. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0027] The vehicle battery stores electrical energy used as the driving source for the motor in a hybrid or electric vehicle and operates within a certain temperature range. The vehicle battery can be cooled by a cooling device, which can be called a cooling plate. The height of the cooling device is greater than its length and width. The connecting part of the cooling device is a plate-shaped structure with a low height. The cooling device can directly contact the battery casing.

[0028] See Figures 1 to 20The cooling device 100 includes a first manifold assembly 10, a second manifold assembly 20, and a connecting portion 30. The vehicle battery can contact the connecting portion and exchange heat. The connecting portion 30 includes a refrigerant connecting portion 31 and a coolant connecting portion 32. The first manifold assembly 10 includes a first manifold 11 and a second manifold 12. The refrigerant connecting portion 31 is located between the first manifold 11 and the second manifold 12, and the first manifold 11 and the second manifold 12 are connected through the refrigerant connecting portion 31. The second manifold assembly 20 includes a third manifold 21 and a fourth manifold 22. The coolant connecting portion 32 is located between the third manifold 21 and the fourth manifold 22, and the third manifold 21 and the fourth manifold 22 are connected through the coolant connecting portion 32. The refrigerant connecting portion 31 and the coolant connecting portion 32 are arranged alternately side by side. The manifold 11 and the third manifold 21 are located on the same side of the connecting part 30, and the second manifold 12 and the fourth manifold 22 are located on the same side of the connecting part 30. The connecting part 30 can be integrally extruded. The refrigerant connecting part 31 includes multiple extruded first channels 301 arranged side by side. The coolant connecting part 32 includes multiple extruded second channels 302 arranged side by side. The flow area of ​​the first channel 301 is smaller than that of the second channel 302, which is beneficial to improving the heat exchange efficiency of the refrigerant. The number of first channels 301 is greater than the number of second channels 302. The first channels 301 can be called microchannels. The second channels 302 are connected to the third manifold 21 and the fourth manifold 22. The first channels 301 are connected to the first manifold 11 and the second manifold 12. The refrigerant passage and coolant passage of the cooling device in this application are arranged alternately. The vehicle battery can be located on one surface of the connecting part. It can utilize the characteristics of the refrigerant and coolant to balance the difference in thermal inertia. For example, the refrigerant cools down quickly, which is beneficial for rapid discharge cooling, while the coolant can reduce the temperature difference on the surface of the cold plate due to thermal inertia. After parking, the coolant is used to cool the battery and keep the battery temperature constant.

[0029] See Figures 1-7In the first embodiment of the cooling device, the refrigerant connection part 31 and the coolant connection part 32 are aligned on both sides of the connection part. The thickness of the first manifold 11 is greater than the thickness of the third manifold 21, and the thickness of the second manifold 12 is greater than the thickness of the fourth manifold 22. The first manifold 11 and the second manifold 12 are welded to the refrigerant connection part 31, and the third manifold 21 and the fourth manifold 22 are welded to the coolant connection part 32. The refrigerant connection 31 and the coolant connection 32 extend in the same direction, along the extension directions of the first flow channel 301 and the second flow channel 302. The end of the refrigerant connection 31 protrudes beyond the end of the coolant connection 32. The first manifold 11 and the third manifold 21 are arranged side by side. The refrigerant connection 31 passes through the third manifold 21, connects with the first manifold 11, and is located inside the first manifold. The end of the coolant connection 32 is located in the third manifold 21. The second manifold 12 and the fourth manifold 22 are arranged side by side. The refrigerant connection 31 passes through the fourth manifold 22, connects with the second manifold 12, and is located inside the second manifold. The end of the coolant connection 32 is located in the fourth manifold 22. By arranging the first manifold 11 and the third manifold 21 side by side along the extension direction of the connection, and arranging the second manifold 12 and the fourth manifold 22 side by side along the extension direction of the connection, it is beneficial to reduce the height of the cooling device and make the cooling device more level.

[0030] See Figures 8-14In a second embodiment of the cooling device, the refrigerant connection portion 31 and the coolant connection portion 32 are aligned on both sides of the connection portion. In other words, both the refrigerant connection portion 31 and the coolant connection portion 32 are flat plate structures with the same extension length. The connection portion 30 includes a first end 331, a second end 332, and a first surface 333. The first surface 333 is perpendicular to the first end 331 and / or the second end 332. The first manifold 11 and the... The third manifold 21 is located at one end of the connecting portion 30, and the second manifold 12 and the fourth manifold 22 are located at the other end of the connecting portion 30. The first manifold 11 is connected to the first end 331 of the connecting portion 30, and the second manifold 12 is connected to the second end 332 of the connecting portion 30. The cooling device 100 also includes a first partition 40 and a second partition 50. The first partition 40 is fixedly connected to the connecting portion 30 and located at the first end 331 of the connecting portion 30. The second partition 50 is fixedly connected to the connecting portion 30 and located at the second end 332 of the connecting portion 30. The second end 332 of section 30, the first partition 40 and the second partition 50 can block the second channel 302 to prevent the second channel 302 from communicating with the first manifold 11 and the second manifold 12; the first partition 40 has a first connecting hole 303, which connects the first manifold 11 and the first channel 301; the second partition 50 has a second connecting hole (which may have the same structure as the first connecting hole, not shown in the figure), which connects the second manifold 12 and the first channel 301; the third manifold... 21 and the fourth manifold 22 are fixedly connected to the first surface 333. The first surface has a third connecting hole 304 and a fourth connecting hole 305. The third connecting hole 304 connects the third manifold 21 and the second channel 302, and the fourth connecting hole 305 connects the fourth manifold 22 and the second channel 302. Of course, the third manifold and the fourth manifold are provided with a fifth through hole 218 and a sixth through hole (which can have the same structure as the fifth connecting hole, not shown in the figure) corresponding to the third connecting hole 304 and the fourth connecting hole 305.

[0031] The first partition 40 includes a first partition 41 and a second partition 42. The first partition 41 and the second partition 42 are perpendicularly connected. The extending direction of the first partition 41 is the same as the extending direction of the first channel 301, and the extending direction of the second partition 42 is perpendicular to the extending direction of the first channel 301. A first connecting hole 303 is located in the second partition 42. The second partition 42 can block the second channel 302. The first channel 301 and the first manifold 11 pass through the first connecting hole 303. The first partition 41 includes a first sidewall 411, a second sidewall 412, a first top 413, and a first bottom 414. The angle between the outer surface of the first sidewall 411 and the first bottom 414 is greater than 90°. The angle between the outer side of the wall 412 and the first bottom 414 is greater than 90°. The first top 413 and the first bottom 414 are separated from the side wall of the first manifold 11 by a gap. The first partition 40 forms part of the first manifold 11. Specifically, the second partition 42 forms part of the side wall of the first manifold 11, and the first partition 41 forms the diversion part or part of the side wall of the first manifold 11. In this way, after the refrigerant enters the first manifold 11, it enters the turbulent state through the diversion of the first partition 41, and then enters the refrigerant communication part 31 of the communication part through the first communication hole 303. After passing through the refrigerant communication part 31, it enters the second manifold 12, and the refrigerant leaves the cooling device through the second manifold 12. If the cooling device is a multi-stage system, the channel enters the second stage or subsequent stage after passing through the second manifold; alternatively, the second baffle can be omitted, and the second channel can be blocked by the side wall of the first manifold. The side wall of the first manifold has a first connecting hole, through which the first channel communicates with the inner cavity of the first manifold. (See reference...) Figure 14 and Figure 15 The first collector 11 has a notch 118, which is fitted with the first partition 41. The first partition 41 is inserted into the notch 118 and fixed and sealed. The first connecting hole 303 is connected to the first channel 301.

[0032] Of course, the structure of the second partition can be the same as that of the first partition, that is, the second partition includes a third partition and a fourth partition. The fourth partition can block the second channel and has a second connecting hole. The second connecting hole connects the second manifold and the first channel. The third partition and the fourth partition are perpendicularly connected. The extension direction of the third partition is the same as the extension direction of the first channel, and the extension direction of the fourth partition is perpendicular to the extension direction of the first channel. This will not be elaborated here. Of course, the second partition can also only include the fourth partition, which is part of the sidewall of the second manifold, without including the third partition. The second channel is blocked by the sidewall of the second manifold, and the sidewall of the second manifold forms a second connecting hole. The first channel communicates with the inner cavity of the second manifold through the second connecting hole. Alternatively, the cooling device also has a connecting part with a second connecting hole that communicates with the first channel. The connecting part is located at the end of the connecting part and is fixedly connected to the connecting part. In this way, the end face of the connecting part protrudes from the end face of the connecting part, and the sidewall of the second manifold can be connected and fitted with the sidewall of the connecting part.

[0033] The coolant enters the coolant communication section through the fourth manifold 42 and the fourth communication hole. The coolant in the cooling communication section enters the third manifold through the third communication hole. The coolant in the third manifold can leave the cooling device or enter the next process.

[0034] See Figures 15-20In a third embodiment of the cooling device, the connecting portion 30 includes a first end 381, a second end 382, ​​and a main body 383, with the main body 383 located between the first end 381 and the second end 382. Both the first end 381 and the second end 382 of the connecting portion 30 are arranged in a Y-shape with the main body 383. The angles θ1 and θ2 between the first end 381 and the first and second surfaces of the main body 382 are greater than or equal to 90°. The first end 382 includes a first end 385 of a refrigerant connecting portion and a coolant connecting portion. The first end 386 of the refrigerant connection, the first end 385 of the refrigerant connection, and the first end 386 of the coolant connection form a set angle α. The length of the refrigerant connection extending into the first manifold is the same as the length of the coolant connection extending into the third manifold. At least a portion of the first manifold 11 and at least a portion of the third manifold 21 are stacked vertically along a direction perpendicular to the main body. The first end 385 of the refrigerant connection is located within the inner cavity of the first manifold 11, and the first end 386 of the coolant connection is located within the inner cavity of the third manifold 21. The second end has the same structure as the first end (not shown in the figure). The second end includes the second end of the refrigerant connection and the second end of the coolant connection. The second end of the refrigerant connection and the second end of the coolant connection form a set angle. The length of the refrigerant connection is the same as the length of the coolant connection. At least a portion of the second manifold and at least a portion of the fourth manifold are stacked vertically along a direction perpendicular to the main body. The second end of the refrigerant connection is located within the inner cavity of the second manifold, and the second end of the coolant connection is located within the inner cavity of the fourth manifold. The first and third manifolds are fixedly connected to the first end of the connecting portion, and the second and fourth manifolds are fixedly connected to the second end of the connecting portion. In this embodiment, compared with the first embodiment, the two sets of manifolds located at both ends of the connecting portion are stacked, and the lengths of the coolant connecting portion and the refrigerant connecting portion are the same. This is beneficial for reducing the length of the cooling device without reducing the surface area of ​​the connecting portion. Compared with the second embodiment, there is no need to set up a partition, which is beneficial for reducing costs and simplifying the assembly process.

[0035] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A cooling device capable of cooling an in-vehicle battery, the cooling device comprising a first header assembly, a second header assembly, and a communication portion, the communication portion including a refrigerant communication portion and a coolant communication portion, the first header assembly including a first header and a second header, a portion of the refrigerant communication portion being located between the first header and the second header, the first header and the second header being in communication via the refrigerant communication portion, the second header assembly including a third header and a fourth header, a portion of the coolant communication portion being located between the third header and the fourth header, the third header and the fourth header being in communication via the coolant communication portion, the refrigerant communication portion and the coolant communication portion being alternately arranged side by side, the first header and the third header being located on the same side of the communication portion, the third header and the fourth header being located on the same side of the communication portion, characterized in that: The refrigerant communication part includes a plurality of first channels arranged side by side, the cooling liquid communication part includes a plurality of second channels arranged side by side, the flow area of the first channel is smaller than that of the second channel, the number of the first channels is more than that of the second channels, the second channels are in communication with the third and fourth header pipes, and the first channels are in communication with the first and second header pipes. The refrigerant communication part is in communication with the first header pipe through the third header pipe, and the refrigerant communication part is in communication with the second header pipe through the fourth header pipe. Alternatively, the communication part includes a first end, a second end and a main body part, the first end and the second end of the communication part are Y-shaped with the main body part of the communication part, the first header pipe and the third header pipe are fixedly connected with the first end of the communication part, the second header pipe and the fourth header pipe are fixedly connected with the second end of the communication part, and the length of the refrigerant communication part is the same as that of the cooling liquid communication part. Alternatively, the cooling device further includes a first partition and a second partition, the first partition is fixedly connected with the communication part and located at the first end of the communication part, the second partition is fixedly connected with the communication part and located at the second end of the communication part, the first partition can block the second channel, the first partition has a first communication hole, the first communication hole connects the first header pipe with the first channel, and the second partition has a second communication hole, the second communication hole connects the second header pipe with the first channel.

2. Cooling device according to claim 1, characterized in that The thickness of the first header pipe is greater than that of the third header pipe, the thickness of the second header pipe is greater than that of the fourth header pipe, the first header pipe and the second header pipe are welded with the refrigerant communication part, and the third header pipe and the fourth header pipe are welded with the cooling liquid communication part.

3. Cooling device according to claim 2, characterized in that: The extension directions of the refrigerant communication part and the cooling liquid communication part are the same, the refrigerant communication part protrudes from the cooling liquid communication part along the extension directions of the first flow channel and the second flow channel, the first header pipe and the third header pipe are arranged side by side, and the end of the cooling liquid communication part is located in the third header pipe.

4. Cooling device according to claim 2 or 3, characterized in that: The extension directions of the refrigerant communication part and the cooling liquid communication part are the same, the end of the refrigerant communication part protrudes from the end of the cooling liquid communication part along the extension directions of the first flow channel and the second flow channel, the second header pipe and the fourth header pipe are arranged side by side, and the end of the cooling liquid communication part is located in the fourth header pipe.

5. The cooling device of claim 1, wherein: The first end and the main body part form an included angle greater than or equal to 90 degrees, the first end includes the first end of the refrigerant communication part and the first end of the cooling liquid communication part, the first end of the refrigerant communication part and the first end of the cooling liquid communication part form a set included angle, and the length of the refrigerant communication part extending into the first header pipe is the same as that of the cooling liquid communication part extending into the third header pipe.

6. Cooling device according to claim 5, characterized in that: The main body part is located between the first end and the second end, the second end is greater than or equal to 90 degrees with the main body part, the second end includes the second end of the refrigerant communication part and the second end of the cooling liquid communication part, the second end of the refrigerant communication part and the second end of the cooling liquid communication part are set at an angle, the second header is vertically stacked with the fourth header, the second end of the refrigerant communication part is located in the second header, and the second end of the cooling liquid communication part is located in the fourth header.

7. The cooling device of claim 1, wherein: The surface of the refrigerant communication part and the cooling liquid communication part is flush, the extension length of the refrigerant communication part and the cooling liquid communication part is the same, the communication part includes a first end, a second end and a first surface, the first surface is perpendicular to the first end and / or the second end, the first header is located at one end of the communication part, the second header is located at the other end of the communication part, the first header is connected with the first end of the communication part, the second header is connected with the second end of the communication part, the third header is fixedly connected with the first surface, the first surface has a third communication hole, and the third communication hole communicates the third header with the first channel.

8. Cooling device according to claim 7, characterized in that The first partition includes a first partition plate and a second partition plate, the first partition plate is connected vertically with the second partition plate, the extension direction of the first partition plate is the same as the extension direction of the first channel, the extension direction of the second partition plate is perpendicular to the extension direction of the first channel, the first communication hole is located in the second partition plate, and the second partition plate can block the second channel, the first partition plate includes a first side wall, a second side wall, a first top and a first bottom, the angle between the outer side of the first side wall and the first bottom is greater than 90°, the angle between the outer side of the second side wall and the first bottom is greater than 90°, the first top and the first bottom are spaced apart from the side wall of the first header by a set gap, and the first partition forms part of the side wall of the first header.

9. Cooling device according to claim 7, characterized in that: The first partition includes a first partition plate, the extension direction of the first partition plate is the same as the extension direction of the first channel, the first partition plate includes a first side wall, a second side wall, a first top and a first bottom, the angle between the outer side of the first side wall and the first bottom is greater than 90°, the angle between the outer side of the second side wall and the first bottom is greater than 90°, the first top and the first bottom are spaced apart from the side wall of the first header by a set gap, the side wall of the first header has a first communication hole, the side wall of the first header blocks the second channel, the first channel communicates with the inner cavity of the first header through the first communication hole, the first header has a notch part, the notch part is matched with the first partition plate, and the first partition plate is inserted into the notch part and fixedly sealed.

10. Cooling device according to claim 8 or 9, characterized in that: The second partition can block the second channel, the second partition has a second communication hole, the fourth collecting pipe is fixedly connected with the first surface, the first surface has a fourth communication hole, and the fourth communication hole communicates the fourth collecting pipe with the second channel.

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