Liquid cooling plate, battery pack and vehicle

Abstract

The utility model discloses a liquid cooling plate, a battery pack and a vehicle. The liquid cooling plate comprises a first flow channel, a second flow channel, a third flow channel, a diversion groove, an inlet and an outlet, the inlet and the outlet are located at the two ends of the middle of the liquid cooling plate in the width direction respectively, the first flow channel is distributed in the width direction of the liquid cooling plate and communicated with the inlet and the diversion groove, and the diversion groove is distributed in the length direction of the liquid cooling plate and arranged in the middle of the liquid cooling plate. The second flow channel and the third flow channel are respectively arranged at two ends of the diversion groove and are symmetrically arranged about the central axis of the first flow channel, the second flow channel is communicated with one end of the diversion groove and the outlet, and the third flow channel is communicated with the other end of the diversion groove and the outlet. Thus, cooling liquid entering from the inlet needs to reach the flow dividing groove through the first flow channel and then is divided into other flow channels from the flow dividing groove, and the resistance of the cooling liquid is reduced. And meanwhile, the cooling liquid firstly reaches the middle position of the liquid cooling plate so as to exchange heat with the middle position of the battery pack, so that the temperature uniformity of the battery pack is ensured.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and more specifically, to a liquid cooling plate, a battery pack and a vehicle. Background Art

[0002] At present, for vehicles such as electric vehicles, the cooling of the battery pack is very important. The battery pack generally includes a liquid cooling plate and a battery cell arranged on the liquid cooling plate, wherein the liquid cooling plate can cool the battery cell. However, in the related art, the flow channel inside the liquid cooling plate for passing the coolant is usually an S-shaped flow channel or a U-shaped flow channel. During use, it is found that the coolant resistance is large, and there is a large difference in temperature between different areas of the battery, especially the heat accumulation in the middle area of ​​the battery pack, which cannot meet the temperature uniformity requirements and affects the performance of the battery pack. Utility Model Content

[0003] Embodiments of the present application provide a liquid cooling plate, a battery pack, and a vehicle.

[0004] The liquid cooling plate of the embodiment of the present application includes a first flow channel, a second flow channel, a third flow channel, a diverter groove, an inlet and an outlet, wherein the inlet and the outlet are respectively located at the two ends of the middle part of the width direction of the liquid cooling plate, the first flow channel is distributed along the width direction of the liquid cooling plate and connects the inlet and the diverter groove, the diverter groove is distributed along the length direction of the liquid cooling plate and is arranged in the middle position of the liquid cooling plate, the second flow channel and the third flow channel are respectively arranged at the two ends of the diverter groove and are symmetrically arranged about the central axis of the first flow channel, wherein the second flow channel connects one end of the diverter groove and the outlet, and the third flow channel connects the other end of the diverter groove and the outlet.

[0005] In the liquid cooling plate of the embodiment of the present application, the liquid cooling plate includes a first flow channel, a second flow channel, a third flow channel, a diverter groove, an inlet and an outlet, wherein the inlet and the outlet are respectively located at the two ends of the middle part of the width direction of the liquid cooling plate, the first flow channel is distributed along the width direction of the liquid cooling plate and connects the inlet and the diverter groove, the diverter groove is distributed along the length direction of the liquid cooling plate and is symmetrically arranged about the central axis of the first flow channel, the second flow channel and the third flow channel are respectively arranged at the two ends of the diverter groove and are symmetrically arranged along the width direction of the liquid cooling plate, wherein the second flow channel connects one end of the diverter groove and the outlet, and the third flow channel connects the other end of the diverter groove and the outlet. In this way, the diverter groove is arranged in the middle position of the liquid cooling plate, and the coolant entering the inlet needs to first reach the diverter groove through the first flow channel, and then be diverted from the diverter groove to other flow channels, and finally flow out from the outlet, and the coolant resistance is reduced. At the same time, the coolant will first reach the middle position of the liquid cooling plate to exchange heat with the middle position of the battery pack, avoid heat accumulation in the middle area of ​​the battery pack, and ensure the temperature uniformity of the battery pack.

[0006] In some embodiments, the liquid cooling plate includes a first half area and a second half area, the first half area and the second half area are symmetrically arranged about the first flow channel, the second flow channel is arranged in the first half area, and the third flow channel is arranged in the second half area.

[0007] In this way, the liquid cooling plate may include two symmetrical regions, and the second flow channel and the third flow channel are respectively arranged in the two regions to distribute the cold flow channels as evenly as possible, thereby increasing the heat dissipation area of ​​the liquid cooling plate.

[0008] In some embodiments, the liquid cooling plate further includes a fourth flow channel and a fifth flow channel, the fourth flow channel respectively connecting the second flow channel and the outlet, the fifth flow channel respectively connecting the third flow channel and the outlet, the fourth flow channel is semicircular in shape and disposed in the first half zone, and the fifth flow channel is semicircular in shape and disposed in the second half zone.

[0009] In this way, the fourth flow channel and the fifth flow channel are in a ring shape, the fourth flow channel is used to connect the second flow channel and the outlet, and the fifth flow channel is used to connect the third flow channel and the outlet, so that the coolant can flow to the outlet through the fourth flow channel and the fifth flow channel after flowing through the second flow channel and the third flow channel for heat exchange, to ensure that the coolant can flow quickly in the liquid cooling plate and can cover the entire battery cell assembly as much as possible in the second flow channel and the third flow channel.

[0010] In some embodiments, the second flow channel includes a first sub-channel, a second sub-channel, a third sub-channel, a fourth sub-channel, a fifth sub-channel, a sixth sub-channel and a seventh sub-channel, and the first sub-channel, the second sub-channel, the third sub-channel, the fourth sub-channel, the fifth sub-channel, the sixth sub-channel and the seventh sub-channel are radially and evenly distributed and are all connected to the fourth flow channel and the diversion groove.

[0011] In this way, the second flow channel includes multiple sub-flow channels so that the coolant can cover the battery cell assembly as much as possible in the second flow channel. The coolant flows in the multiple sub-flow channels to flow through different positions of the battery cell assembly, so that the temperature range of the entire battery pack is in a uniform and stable state.

[0012] In some embodiments, the angles between adjacent ones of the first sub-channel, the second sub-channel, the third sub-channel, the fourth sub-channel, the fifth sub-channel, the sixth sub-channel and the seventh sub-channel are all 30°.

[0013] In this way, different sub-channels are radially distributed relatively evenly, so that the coolant can cover the entire battery cell assembly as much as possible.

[0014] In some embodiments, the third flow channel includes an eighth sub-channel, a ninth sub-channel, a tenth sub-channel, an eleventh sub-channel, a twelfth sub-channel, a thirteenth sub-channel and a fourteenth sub-channel, and the eighth sub-channel, the ninth sub-channel, the tenth sub-channel, the eleventh sub-channel, the twelfth sub-channel, the thirteenth sub-channel and the fourteenth sub-channel are radially and evenly distributed and are all connected to the fifth flow channel and the diversion channel.

[0015] In this way, the third flow channel includes multiple sub-flow channels, so that the coolant can cover the battery cell assembly as much as possible in the third flow channel, and the coolant flows in the multiple sub-flow channels to flow through different positions of the battery cell assembly, so that the temperature of the entire battery pack is uniform and stable. The second flow channel and the third flow channel can include multiple sub-flow channels, and the coolant can flow in the sub-flow channels to cover the entire battery cell assembly, so as to achieve overall temperature stability of the battery pack.

[0016] In certain embodiments, the angles between adjacent ones of the eighth sub-channel, the ninth sub-channel, the tenth sub-channel, the eleventh sub-channel, the twelfth sub-channel, the thirteenth sub-channel and the fourteenth sub-channel are all 30°.

[0017] In this way, different sub-channels are radially distributed relatively evenly, so that the coolant can cover the entire battery cell assembly as much as possible.

[0018] In some embodiments, at least a portion of the sub-channels in the second channel and the third channel are formed with a baffle, and the baffle is disposed in the middle of the sub-channel, and the length of the baffle is consistent with that of the sub-channel.

[0019] In this way, the baffle can block and pressurize the coolant flowing through the sub-channels, so that the sub-channels at different positions can maintain relatively consistent pressure, avoiding too large a flow difference of the coolant in different sub-channels under the action of pressure.

[0020] In some embodiments, the width of the baffle gradually increases along the direction from the opening to the outlet.

[0021] In this way, the baffle can gradually increase the resistance so that the flow velocity of the coolant slows down after entering the sub-channel, resulting in a longer heat exchange time.

[0022] In some embodiments, the widths of the sub-channels of the second channel and the third channel are 10 mm to 20 mm, and the widths of the first channel, the fourth channel, and the fifth channel are 20 mm to 40 mm.

[0023] Thus, the width of the sub-channels of the second channel and the third channel is set within this range, which can ensure that the resistance of the coolant is small, and at the same time, the coolant can quickly flow through the second channel and the third channel to achieve heat exchange. The width of the first channel, the fourth channel and the fifth channel is set within this range, so that the channel has enough space to quickly input and discharge the coolant, thereby increasing the flow speed of the coolant.

[0024] In some embodiments, the liquid cooling plate further includes a sixth flow channel, wherein the sixth flow channel is respectively connected to the diversion groove and the outlet, the sixth flow channel is located on the central axis of the first flow channel, and the width of the sixth flow channel is smaller than the width of the first flow channel.

[0025] In this way, the sixth flow channel directly connects the shunt groove and the outlet, so that part of the coolant can cover the battery cell assembly between the shunt groove and the outlet, ensuring that the coolant covers the entire area. At the same time, the width of the sixth flow channel is smaller than the width of the first flow channel to prevent most of the coolant from being discharged directly from the sixth flow channel and the outlet.

[0026] The battery pack according to the embodiment of the present application includes the liquid cooling plate described in any one of the above embodiments.

[0027] The vehicle according to the embodiment of the present application includes the battery pack described in the above embodiment.

[0028] In the liquid cooling plate, battery pack and vehicle of the embodiment of the present application, the liquid cooling plate includes a first flow channel, a second flow channel, a third flow channel, a diverter, an inlet and an outlet, wherein the inlet and the outlet are respectively located at the two ends of the middle part of the width direction of the liquid cooling plate, the first flow channel is distributed and arranged along the width direction of the liquid cooling plate and connects the inlet and the diverter, the diverter is distributed along the length direction of the liquid cooling plate and is arranged in the middle position of the liquid cooling plate, the second flow channel and the third flow channel are respectively arranged at the two ends of the diverter and are symmetrically arranged about the central axis of the first flow channel, wherein the second flow channel connects one end of the diverter and the outlet, and the third flow channel connects the other end of the diverter and the outlet. In this way, the diverter is arranged in the middle position of the liquid cooling plate, and the coolant entering the inlet needs to first reach the diverter through the first flow channel, and then be diverted from the diverter to other flow channels, and finally flow out from the outlet, and the coolant resistance is reduced. At the same time, the coolant will first reach the middle position of the liquid cooling plate to exchange heat with the middle position of the battery pack, avoid heat accumulation in the middle area of ​​the battery pack, and ensure the temperature uniformity of the battery pack.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 is a schematic structural diagram of a liquid cooling plate according to an embodiment of the present application;

[0032] Figure 2 is another structural schematic diagram of a liquid cooling plate according to an embodiment of the present application;

[0033] Figure 3 is a schematic structural diagram of a battery pack according to an embodiment of the present application;

[0034] Figure 4 It is a schematic diagram of the structure of a vehicle according to an embodiment of the present application.

[0035] Description of main component symbols:

[0036] Liquid cooling plate 100;

[0037] The first half area 101, the second half area 102, the first flow channel 10, the second flow channel 20, the first sub-flow channel 21, the second sub-flow channel 22, the third sub-flow channel 23, the fourth sub-flow channel 24, the fifth sub-flow channel 25, the sixth sub-flow channel 26, the seventh sub-flow channel 27, the baffle 28, the third flow channel 30, the eighth sub-flow channel 31, the ninth sub-flow channel 32, the tenth sub-flow channel 33, the eleventh sub-flow channel 34, the twelfth sub-flow channel 35, the thirteenth sub-flow channel 36, the fourteenth sub-flow channel 37, the fourth flow channel 40, the fifth flow channel 50, the sixth flow channel 60, the diverter 70, the inlet 80, the outlet 90, the battery pack 200, the battery cell assembly 201, and the vehicle 300. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0039] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and examples of materials provided in the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0041] See also Figure 1 and Figure 2 The liquid cooling plate 100 of the embodiment of the present application includes a first flow channel 10, a second flow channel 20, a third flow channel 30, a diverter groove 70, an inlet 80 and an outlet 90, wherein the inlet 80 and the outlet 90 are respectively located at the two ends of the middle part of the width direction of the liquid cooling plate 100, the first flow channel 10 is distributed along the width direction of the liquid cooling plate 100 and connects the inlet 80 and the diverter groove 70, the diverter groove 70 is distributed along the length direction of the liquid cooling plate 100 and is arranged in the middle position of the liquid cooling plate 100, the second flow channel 20 and the third flow channel 30 are respectively arranged at the two ends of the diverter groove 70 and are symmetrically arranged about the central axis of the first flow channel 10, wherein the second flow channel 20 connects one end of the diverter groove 70 and the outlet 90, and the third flow channel 30 connects the other end of the diverter groove 70 and the outlet 90.

[0042] See also Figure 3 The battery pack 200 according to the embodiment of the present application includes the liquid cooling plate 100 according to the embodiment of the present application.

[0043] In the liquid cooling plate 100 and the battery pack 200 of the embodiment of the present application, the liquid cooling plate 100 includes a first flow channel 10, a second flow channel 20, a third flow channel 30, a diverter groove 70, an inlet 80 and an outlet 90, wherein the inlet 80 and the outlet 90 are respectively located at the two ends of the middle part of the width direction of the liquid cooling plate 100, the first flow channel 10 is distributed along the width direction of the liquid cooling plate 100 and connects the inlet 80 and the diverter groove 70, the diverter groove 70 is distributed along the length direction of the liquid cooling plate 100 and is arranged in the middle position of the liquid cooling plate 100, the second flow channel 20 and the third flow channel 30 are respectively arranged at the two ends of the diverter groove 70 and are symmetrically arranged about the central axis of the first flow channel 10, wherein the second flow channel 20 connects one end of the diverter groove 70 and the outlet 90, and the third flow channel 30 connects the other end of the diverter groove 70 and the outlet 90. In this way, the diverter groove 70 is set in the middle position of the liquid cooling plate 100, and the coolant entering the inlet 80 needs to first reach the diverter groove 70 through the first flow channel 10, and then be diverted from the diverter groove 70 to other flow channels, and finally flow out from the outlet 90, and the coolant resistance is reduced. At the same time, the coolant will first reach the middle position of the liquid cooling plate 100 to exchange heat with the middle position of the battery pack 200, avoiding heat accumulation in the middle area of ​​the battery pack 200, and ensuring the temperature uniformity of the battery pack 200.

[0044] Specifically, the liquid cooling plate 100 is connected to other components through pipes, so that the coolant can flow between the liquid cooling plate 100 and other components to form a thermal management system of the vehicle 300. The thermal management system can achieve heat transfer by flowing the coolant between different components, thereby achieving the functions of heat dissipation and heating. The liquid cooling plate 100 of the embodiment of the present application is arranged on the battery pack 200, and the coolant flows through the liquid cooling plate 100 to exchange heat with the battery cell assembly 201 of the battery pack 200, thereby cooling or heating the battery cell assembly 201 and ensuring the normal operation of the battery pack 200.

[0045] Further, in some embodiments, the liquid cooling plate 100 includes a first half zone 101 and a second half zone 102 , the first half zone 101 and the second half zone 102 are symmetrically arranged about the central axis of the first flow channel 10 , the second flow channel 20 is arranged in the first half zone 101 , and the third flow channel 30 is arranged in the second half zone 102 .

[0046] In this way, the liquid cooling plate 100 may include two symmetrical regions, and the second flow channel 20 and the third flow channel 30 are respectively arranged in the two regions to distribute the cold flow channels as evenly as possible and increase the heat dissipation area of ​​the liquid cooling plate.

[0047] Specifically, the liquid cooling plate 100 is in the shape of a rectangular plate and can be attached to at least one side of the battery cell assembly 201. At the same time, the liquid cooling plate 100 also includes a first flow channel 10, a second flow channel 20, a third flow channel 30, a shunt groove 70, an inlet 80 and an outlet 90 arranged inside. The coolant enters the flow channel of the liquid cooling plate 100 from the inlet 80, exchanges heat with the battery cell assembly 201 in the flow channel, and then flows out from the outlet 90 position to form a sequential cycle. The flow channel of the liquid cooling plate 100 needs to cover the coolant to different positions of the battery cell assembly 201 as much as possible, so that the temperature of the entire battery pack 200 is uniform. The inlet 80 is connected to the first flow channel 10, and the first flow channel 10 can be connected to the shunt groove 70. The second flow channel 20 and the third flow channel 30 can be respectively arranged at both ends of the shunt groove 70, so that the coolant can lead to different positions after entering the flow channel, covering all areas of the battery cell assembly 201 as much as possible. At the same time, the flow is diverted from the diverter groove 70 to two flow channels, which can reduce the resistance to the coolant, so that the coolant can quickly flow through the liquid cooling plate 100 to achieve heat exchange. The diverter groove 70 is set in the middle position of the liquid cooling plate 100. The coolant entering the inlet 80 needs to reach the diverter groove 70 through the first flow channel 10 first, and then diverted from the diverter groove 70 to other flow channels. The coolant will first reach the middle position of the liquid cooling plate 100 to exchange heat with the middle position of the battery pack 200, avoid heat accumulation in the middle area of ​​the battery pack 200, ensure the temperature uniformity of the battery pack 200, and avoid a large temperature difference between the battery cell components 201.

[0048] In the embodiment of the present application, the position of the liquid cooling plate 100 is not limited, and it is only necessary that the liquid cooling plate 100 can exchange heat with the battery cell assembly 201 of the battery pack 200. For example, the liquid cooling plate 100 can be set at the tray position of the battery pack 200, or the liquid cooling plate 100 can also be set at the top cover position of the battery pack 200, or the liquid cooling plate 100 can also be set at the tray and top cover positions of the battery pack 200 at the same time, that is, the number of liquid cooling plates 100 is not limited to meet different needs.

[0049] See also Figure 1 and Figure 2 In some embodiments, the liquid cooling plate 100 further includes a fourth flow channel 40 and a fifth flow channel 50. The fourth flow channel 40 is respectively connected to the second flow channel 20 and the outlet 90, and the fifth flow channel 50 is respectively connected to the third flow channel 30 and the outlet 90. The fourth flow channel 40 is semicircular in shape and is disposed in the first half area 101, and the fifth flow channel 50 is semicircular in shape and is disposed in the second half area 102.

[0050] In this way, the fourth flow channel 40 and the fifth flow channel 50 are in a ring shape, the fourth flow channel 40 is used to connect the second flow channel 20 and the outlet 90, and the fifth flow channel 50 is used to connect the third flow channel 30 and the outlet 90, so that the coolant can flow to the outlet 90 through the fourth flow channel 40 and the fifth flow channel 50 after flowing through the second flow channel 20 and the third flow channel 30 for heat exchange, so as to ensure that the coolant can flow quickly in the liquid cooling plate 100 and can cover the entire battery cell assembly 201 as much as possible in the second flow channel 20 and the third flow channel 30.

[0051] For further information, see Figure 1 and Figure 2 In some embodiments, the second flow channel 20 includes a first sub-channel 21, a second sub-channel 22, a third sub-channel 23, a fourth sub-channel 24, a fifth sub-channel 25, a sixth sub-channel 26 and a seventh sub-channel 27. The first sub-channel 21, the second sub-channel 22, the third sub-channel 23, the fourth sub-channel 24, the fifth sub-channel 25, the sixth sub-channel 26 and the seventh sub-channel 27 are radially and evenly distributed and are all connected to the fourth flow channel 40 and the diversion groove 70.

[0052] In this way, the second flow channel 20 includes multiple sub-flow channels so that the coolant can cover the battery cell assembly 201 as much as possible in the second flow channel 20. The coolant flows in the multiple sub-flow channels to flow through different positions of the battery cell assembly 201, so that the temperature range of the entire battery pack 200 is in a uniform and stable state.

[0053] Further, see Figure 1 and Figure 2 In some embodiments, the third flow channel 30 includes an eighth sub-channel 31, a ninth sub-channel 32, a tenth sub-channel 33, an eleventh sub-channel 34, a twelfth sub-channel 35, a thirteenth sub-channel 36 and a fourteenth sub-channel 37, and the eighth sub-channel 31, the ninth sub-channel 32, the tenth sub-channel 33, the eleventh sub-channel 34, the twelfth sub-channel 35, the thirteenth sub-channel 36 and the fourteenth sub-channel 37 are radially evenly distributed and are all connected to the fifth flow channel 50 and the diversion groove 70.

[0054] In this way, the third flow channel 30 includes a plurality of sub-flow channels, so that the coolant can cover the battery cell assembly 201 as much as possible in the third flow channel 30, and the coolant flows in the plurality of sub-flow channels to flow through different positions of the battery cell assembly 201, so that the temperature of the entire battery pack 200 is uniform and stable. The second flow channel 20 and the third flow channel 30 may include a plurality of sub-flow channels, and the coolant can flow in the sub-flow channels to cover the entire battery cell assembly 201, so as to achieve overall temperature stability of the battery pack 200.

[0055] In some embodiments, the angles between adjacent first sub-channel 21 , second sub-channel 22 , third sub-channel 23 , fourth sub-channel 24 , fifth sub-channel 25 , sixth sub-channel 26 and seventh sub-channel 27 are all 30°.

[0056] In some embodiments, the included angles between the eighth sub-channel 31 , the ninth sub-channel 32 , the tenth sub-channel 33 , the eleventh sub-channel 34 , the twelfth sub-channel 35 , the thirteenth sub-channel 36 and the fourteenth sub-channel 37 are all 30°.

[0057] In this way, different sub-flow channels are radially distributed relatively evenly, so that the coolant can cover the entire battery cell assembly 201 as much as possible.

[0058] Specifically, the fourth flow channel 40 can be in a semi-annular shape, and the lengths of the first sub-channel 21, the second sub-channel 22, the third sub-channel 23, the fourth sub-channel 24, the fifth sub-channel 25, the sixth sub-channel 26 and the seventh sub-channel 27 are equal. One ends of the first sub-channel 21, the second sub-channel 22, the third sub-channel 23, the fourth sub-channel 24, the fifth sub-channel 25, the sixth sub-channel 26 and the seventh sub-channel 27 are connected to the diversion groove 70, and the other ends can be radially distributed and connected to the fourth flow channel 40, so that the coolant can enter the fourth flow channel 40 after passing through the second flow channel 20, and then flow out of the liquid cooling plate 100 from the fourth flow channel 40 through the outlet 90. In addition, the angles between the first sub-channel 21, the second sub-channel 22, the third sub-channel 23, the fourth sub-channel 24, the fifth sub-channel 25, the sixth sub-channel 26 and the seventh sub-channel 27 are equal, so that the second channel 20 and the fourth channel 40 can cover the entire first half area 101 as much as possible.

[0059] Furthermore, the fifth flow channel 50 may also be in a semi-annular shape, and the fourth flow channel 40 and the fifth flow channel 50 cooperate to form an elliptical structure. The eighth sub-flow channel 31, the ninth sub-flow channel 32, the tenth sub-flow channel 33, the eleventh sub-flow channel 34, the twelfth sub-flow channel 35, the thirteenth sub-flow channel 36 and the fourteenth sub-flow channel 37 are of equal length. One end of the eighth sub-flow channel 31, the ninth sub-flow channel 32, the tenth sub-flow channel 33, the eleventh sub-flow channel 34, the twelfth sub-flow channel 35, the thirteenth sub-flow channel 36 and the fourteenth sub-flow channel 37 are connected to the diverter groove 70, and the other end may be radially distributed and connected to the fifth flow channel 50, so that the coolant can enter the fifth flow channel 50 after passing through the third flow channel 30, and then flow out of the liquid cooling plate 100 from the fifth flow channel 50 through the outlet 90. In addition, the included angles between the eighth sub-channel 31, the ninth sub-channel 32, the tenth sub-channel 33, the eleventh sub-channel 34, the twelfth sub-channel 35, the thirteenth sub-channel 36 and the fourteenth sub-channel 37 are equal, so that the third channel 30 and the fifth channel 50 can cover the entire second half area 102 as much as possible.

[0060] In such an embodiment, one end of the first sub-channel 21, the second sub-channel 22, the third sub-channel 23, the fourth sub-channel 24, the fifth sub-channel 25, the sixth sub-channel 26 and the seventh sub-channel 27 are connected to the upper end of the shunt groove 70; the other ends of the first sub-channel 21, the second sub-channel 22, the third sub-channel 23, the fourth sub-channel 24, the fifth sub-channel 25, the sixth sub-channel 26 and the seventh sub-channel 27 are connected to the fourth channel 40. In this way, the upper half of the liquid cooling plate 100 is in a half-moon shape as a whole, each sub-channel is radial, and the angles between different sub-channels are the same, all 30°, so that the coolant can be evenly distributed in the first half area 101. It can be understood that at this time, the first sub-channel 21 and the seventh sub-channel 27 can be arranged on the same straight line.

[0061] Similarly, one end of the eighth sub-channel 31, the ninth sub-channel 32, the tenth sub-channel 33, the eleventh sub-channel 34, the twelfth sub-channel 35, the thirteenth sub-channel 36 and the fourteenth sub-channel 37 is connected to the lower end of the shunt groove 70; the other end of the eighth sub-channel 31, the ninth sub-channel 32, the tenth sub-channel 33, the eleventh sub-channel 34, the twelfth sub-channel 35, the thirteenth sub-channel 36 and the fourteenth sub-channel 37 is connected to the fifth channel 50. In this way, the lower half of the liquid cooling plate 100 is also half-moon shaped as a whole, each sub-channel is radial, and the angles between different sub-channels are the same, all 30°, so that the coolant can be evenly distributed in the second half area 102. It can be understood that at this time, the eighth sub-channel 31 and the fourteenth sub-channel 37 can be arranged on the same straight line, and the straight line is arranged parallel to the straight line where the first sub-channel 21 and the seventh sub-channel 27 are located.

[0062] It should be noted that the fourth flow channel 40 and the fifth flow channel 50 are in a semi-ring shape. The flow channels of the fourth flow channel 40 and the fifth flow channel 50 can be arc-shaped or semicircular formed by multiple straight flow channels connected end to end, which is not specifically limited here.

[0063] In some embodiments, the fourth flow channel 40 and the fifth flow channel 50 can be symmetrical with the first flow channel 10 as the central axis, and the second flow channel 20 and the third flow channel 30 can also be symmetrical with the first flow channel 10 as the central axis, the first sub-channel 21, the second sub-channel 22, the third sub-channel 23, the fourth sub-channel 24, the fifth sub-channel 25, the sixth sub-channel 26 and the seventh sub-channel 27 and the eighth sub-channel 31, the ninth sub-channel 32, the tenth sub-channel 33, the eleventh sub-channel 34, the twelfth sub-channel 35, the thirteenth sub-channel 36 and the fourteenth sub-channel 37 can be connected in parallel, and the coolant will flow to different sub-channels after entering the diversion groove 70. Multiple sub-channels can cover as much area of ​​the battery cell assembly 201 as possible to achieve overall temperature stability of the battery pack 200.

[0064] Of course, in other embodiments, the second flow channel 20 and the third flow channel 30 may also be asymmetric, the shapes of the fourth flow channel 40 and the fifth flow channel 50 may be different, and the number of sub-flow channels of the second flow channel 20 and the third flow channel 30 may be different to meet different needs.

[0065] In the embodiments of the present application, the number and angle of the sub-flow channels are not limited to meet different needs. For example, the angles between different sub-flow channels can be adjusted to a certain extent, and it is not necessary for different sub-flow channels to have the same angle. At the same time, after changing the number of flow channels, the angles between different sub-flow channels are also adjusted accordingly.

[0066] See also Figure 1 and Figure 2 In some embodiments, at least a portion of the sub-channels in the second channel 20 and the third channel 30 are formed with a baffle 28, and the baffle 28 is disposed in the middle of the sub-channel, and the baffle 28 is consistent with the length of the sub-channel.

[0067] In this way, the baffle 28 can block and pressurize the coolant flowing through the sub-channels, so that the sub-channels at different positions can maintain relatively consistent pressure, avoiding too large a flow difference of the coolant in different sub-channels under the action of pressure.

[0068] It is understandable that the inlet ends of all sub-channels are connected to the shunt groove 70, and the outlet ends are connected to different positions of the fourth channel 40 and the fifth channel 50, so that the outlet ends of different sub-channels are at different distances from the outlet 90, thereby causing different pressures between different sub-channels. In the embodiment of the present application, a baffle 28 can be added to the sub-channel close to the outlet 90 to maintain pressure balance between different sub-channels. The outlet ends of the first sub-channel 21 and the eighth sub-channel 31 are farthest from the outlet 90, and the outlet ends of the seventh sub-channel 27 and the fourteenth sub-channel 37 are closest to the outlet 90.

[0069] In one embodiment, each sub-channel is provided with a baffle 28, and the closer the outlet end of the sub-channel is to the outlet 90, the greater the width of the baffle 28 of the sub-channel. Specifically, the length of the baffle 28 in the sub-channel is consistent with the length of the sub-channel, and the width of the baffle 28 in the sub-channel can be set between 3mm and 8mm. For example, the width of the baffle 28 in the first sub-channel 21 and the eighth sub-channel 31 can be set to 3mm, and the width of the baffle 28 in the seventh sub-channel 27 and the fourteenth sub-channel 37 can be set to 8mm. That is to say, the widths of the baffles 28 in the first sub-channel 21, the second sub-channel 22, the third sub-channel 23, the fourth sub-channel 24, the fifth sub-channel 25, the sixth sub-channel 26 and the seventh sub-channel 27 increase successively; at the same time, the widths of the baffles 28 in the eighth sub-channel 31, the ninth sub-channel 32, the tenth sub-channel 33, the eleventh sub-channel 34, the twelfth sub-channel 35, the thirteenth sub-channel 36 and the fourteenth sub-channel 37 also increase successively.

[0070] In another embodiment, the baffles 28 may not be provided in the first sub-channel 21 and the eighth sub-channel 31, and the baffles 28 may be provided starting from the second sub-channel 22 and the ninth sub-channel 32, the width of the baffles 28 in the second sub-channel 22 and the ninth sub-channel 32 is the smallest, and the width of the baffles 28 in the seventh sub-channel 27 and the fourteenth sub-channel 37 is the largest, so as to achieve equivalent pressures in the multiple parallel sub-channels and avoid the situation where the coolant only passes through some of the sub-channels.

[0071] In some embodiments, the width of the spoiler 28 gradually increases from the opening to the outlet.

[0072] In this way, the baffle 28 can gradually increase the resistance, so that the flow velocity of the coolant slows down after entering the sub-channel, and there is a longer heat exchange time.

[0073] See also Figure 1 and Figure 2 In some embodiments, the width of the sub-channels of the second flow channel 20 and the third flow channel 30 is 10 mm-20 mm. For example, the width of the sub-channels of the second flow channel 20 and the third flow channel 30 can be set to 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm.

[0074] For further information, see Figure 1 and Figure 2In some embodiments, the width of the first flow channel 10, the fourth flow channel 40 and the fifth flow channel 50 is 20 mm-40 mm. For example, the width of the first flow channel 10, the fourth flow channel 40 and the fifth flow channel 50 can be set to 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, 40 mm.

[0075] Thus, the width of the sub-channels of the second channel 20 and the third channel 30 is set within this range, which can ensure that the resistance of the coolant is small, and at the same time, the coolant can quickly flow through the second channel 20 and the third channel 30 to achieve heat exchange. The width of the first channel 10, the fourth channel 40 and the fifth channel 50 is set within this range, so that the channel has enough space to quickly input and discharge the coolant, thereby increasing the flow speed of the coolant.

[0076] Specifically, the depth of the flow channel and the diverter groove 70 of the liquid cooling plate 100 can be set at 3mm-5mm, and the width of the sub-flow channel of the second flow channel 20 and the third flow channel 30 is set corresponding to the width of the first flow channel 10, the fourth flow channel 40 and the fifth flow channel 50 to ensure that the flow distribution of the coolant is reasonable. Exemplarily, in one example, when the width of the sub-flow channel of the second flow channel 20 and the third flow channel 30 is 10mm, the width of the first flow channel 10, the fourth flow channel 40 and the fifth flow channel 50 can be 20mm. In another example, when the width of the sub-flow channel of the second flow channel 20 and the third flow channel 30 is 15mm, the width of the first flow channel 10, the fourth flow channel 40 and the fifth flow channel 50 can be 30mm. In another example, when the width of the sub-flow channel of the second flow channel 20 and the third flow channel 30 is 20mm, the width of the first flow channel 10, the fourth flow channel 40 and the fifth flow channel 50 can be 40mm.

[0077] It should be noted that the width of the sub-channels of the second channel 20 and the third channel 30 should be kept consistent, and the width of the first channel 10, the fourth channel 40 and the fifth channel 50 should also be kept consistent, so as to achieve consistent pressure on the coolant and balanced flow distribution, thereby achieving overall temperature control stability of the battery pack 200.

[0078] See also Figure 1 and Figure 2 In some embodiments, the liquid cooling plate 100 further includes a sixth flow channel 60 , which respectively connects the diversion groove 70 and the outlet 90 , and the sixth flow channel 60 is located on the central axis of the first flow channel 10 , and the width of the sixth flow channel 60 is smaller than the width of the first flow channel 10 .

[0079] In this way, the sixth flow channel 60 directly connects the shunt groove 70 and the outlet 90, so that part of the coolant can cover the battery cell assembly 201 between the shunt groove 70 and the outlet 90, ensuring that the coolant is fully covered. At the same time, the width of the sixth flow channel 60 is smaller than the width of the first flow channel 10 to prevent most of the coolant from being directly discharged from the sixth flow channel 60 and the outlet 90.

[0080] Specifically, the sixth flow channel 60 can be arranged opposite to the first flow channel 10. The coolant reaches the diverter groove 70 after passing through the inlet 80 and the first flow channel 10. The coolant can flow out of the diverter groove 70 through the second flow channel 20, the third flow channel 30 and the sixth flow channel 60 respectively. The coolant can cover the battery cell assembly 201 between the diverter groove 70 and the outlet 90, ensuring that the coolant covers the entire battery pack 200.

[0081] It should be noted that the width of the sixth flow channel 60 needs to be smaller than the width of the sub-flow channel to prevent a large amount of coolant from flowing out of the sixth flow channel 60 and the outlet 90 .

[0082] See also Figure 4 The vehicle 300 of the embodiment of the present application includes the battery pack 200 of the above embodiment.

[0083] In the liquid cooling plate 100, the battery pack 200 and the vehicle 300 of the embodiment of the present application, the liquid cooling plate 100 includes a first flow channel 10, a second flow channel 20, a third flow channel 30, a diverter groove 70, an inlet 80 and an outlet 90, wherein the inlet 80 and the outlet 90 are respectively located at the two ends of the middle part of the width direction of the liquid cooling plate 100, the first flow channel 10 is distributed along the width direction of the liquid cooling plate 100 and connects the inlet 80 and the diverter groove 70, the diverter groove 70 is distributed along the length direction of the liquid cooling plate 100 and is arranged in the middle position of the liquid cooling plate 100, the second flow channel 20 and the third flow channel 30 are respectively arranged at the two ends of the diverter groove 70 and are symmetrically arranged about the central axis of the first flow channel 10, wherein the second flow channel 20 connects one end of the diverter groove 70 and the outlet 90, and the third flow channel 30 connects the other end of the diverter groove 70 and the outlet 90. In this way, the diverter groove 70 is set in the middle position of the liquid cooling plate 100, and the coolant entering the inlet 80 needs to first reach the diverter groove 70 through the first flow channel 10, and then be diverted from the diverter groove 70 to other flow channels, and finally flow out from the outlet 90, and the coolant resistance is reduced. At the same time, the coolant will first reach the middle position of the liquid cooling plate 100 to exchange heat with the middle position of the battery pack 200, avoiding heat accumulation in the middle area of ​​the battery pack 200, and ensuring the temperature uniformity of the battery pack 200.

[0084] In the implementation manner of the present application, the specific type of the vehicle 300 is not limited. The vehicle 300 can be an electric vehicle or a hybrid vehicle to meet different needs.

[0085] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0086] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0087] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A liquid cooling plate (100), characterized in that: The liquid cooling plate (100) comprises a first flow channel (10), a second flow channel (20), a third flow channel (30), a flow diversion groove (70), an inlet (80) and an outlet (90), wherein the inlet (80) and the outlet (90) are respectively located at two ends of the middle part of the width direction of the liquid cooling plate (100), the first flow channel (10) is distributed along the width direction of the liquid cooling plate (100) and connects the inlet (80) and the flow diversion groove (70), the flow diversion groove (70) is distributed along the length direction of the liquid cooling plate (100) and is arranged in the middle position of the liquid cooling plate (100), the second flow channel (20) and the third flow channel (30) are respectively arranged at two ends of the flow diversion groove (70) and are symmetrically arranged about the central axis of the first flow channel (10), wherein the second flow channel (20) connects one end of the flow diversion groove (70) and the outlet (90), and the third flow channel (30) connects the other end of the flow diversion groove (70) and the outlet (90).

2. The liquid cooling plate (100) according to claim 1, characterized in that: The liquid cooling plate (100) comprises a first half zone (101) and a second half zone (102), wherein the first half zone (101) and the second half zone (102) are symmetrically arranged with respect to the first flow channel (10), the second flow channel (20) is arranged in the first half zone (101), and the third flow channel (30) is arranged in the second half zone (102).

3. The liquid cooling plate (100) according to claim 2, characterized in that: The liquid cooling plate (100) further comprises a fourth flow channel (40) and a fifth flow channel (50), wherein the fourth flow channel (40) is connected to the second flow channel (20) and the outlet (90) respectively, and the fifth flow channel (50) is connected to the third flow channel (30) and the outlet (90) respectively, the fourth flow channel (40) is semicircular in shape and is arranged in the first half area (101), and the fifth flow channel (50) is semicircular in shape and is arranged in the second half area (102).

4. The liquid cooling plate (100) according to claim 3, characterized in that: The second flow channel (20) comprises a first sub-flow channel (21), a second sub-flow channel (22), a third sub-flow channel (23), a fourth sub-flow channel (24), a fifth sub-flow channel (25), a sixth sub-flow channel (26) and a seventh sub-flow channel (27); the first sub-flow channel (21), the second sub-flow channel (22), the third sub-flow channel (23), the fourth sub-flow channel (24), the fifth sub-flow channel (25), the sixth sub-flow channel (26) and the seventh sub-flow channel (27) are evenly distributed in a radial shape and are all connected to the fourth flow channel (40) and the diverter groove (70).

5. The liquid cooling plate (100) according to claim 4, characterized in that: The angles between adjacent ones of the first sub-channel (21), the second sub-channel (22), the third sub-channel (23), the fourth sub-channel (24), the fifth sub-channel (25), the sixth sub-channel (26) and the seventh sub-channel (27) are all 30°.

6. The liquid cooling plate (100) according to claim 3, characterized in that: The third flow channel (30) comprises an eighth sub-flow channel (31), a ninth sub-flow channel (32), a tenth sub-flow channel (33), an eleventh sub-flow channel (34), a twelfth sub-flow channel (35), a thirteenth sub-flow channel (36) and a fourteenth sub-flow channel (37); the eighth sub-flow channel (31), the ninth sub-flow channel (32), the tenth sub-flow channel (33), the eleventh sub-flow channel (34), the twelfth sub-flow channel (35), the thirteenth sub-flow channel (36) and the fourteenth sub-flow channel (37) are evenly distributed in a radial shape and are all connected to the fifth flow channel (50) and the diverter groove (70).

7. The liquid cooling plate (100) according to claim 6, characterized in that: The included angles between the eighth sub-channel (31), the ninth sub-channel (32), the tenth sub-channel (33), the eleventh sub-channel (34), the twelfth sub-channel (35), the thirteenth sub-channel (36) and the fourteenth sub-channel (37) are all 30°.

8. The liquid cooling plate (100) according to claim 4 or 6, characterized in that: A plurality of sub-flow channels in the second flow channel (20) and the third flow channel (30) are formed with a baffle (28), the baffle (28) being arranged in the middle of the sub-flow channel, and the baffle (28) is consistent in length with the sub-flow channel.

9. The liquid cooling plate (100) according to claim 8, characterized in that: The width of the baffle (28) gradually increases from the opening to the outlet.

10. The liquid cooling plate (100) according to claim 4 or 6, characterized in that: The width of the sub-channels of the second channel (20) and the third channel (30) is 10 mm-20 mm, and the width of the first channel (10), the fourth channel (40) and the fifth channel (50) is 20 mm-40 mm.

11. The liquid cooling plate (100) according to claim 1, characterized in that: The liquid cooling plate (100) further comprises a sixth flow channel (60), wherein the sixth flow channel (60) is connected to the diversion groove (70) and the outlet (90), the sixth flow channel (60) is located on the central axis of the first flow channel (10), and the width of the sixth flow channel (60) is smaller than the width of the first flow channel (10).

12. A battery pack (200), characterized in that: A liquid cooling plate (100) comprising any one of claims 1 to 11.

13. A vehicle (300), characterized in that: Comprising the battery pack (200) as claimed in claim 12.

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