Heat exchange plate and battery pack

Abstract

The application relates to a heat exchange plate and a battery pack. The heat exchange plate is internally provided with two water collecting flow channels arranged at intervals and a distribution flow channel communicated between the two water collecting flow channels, the number of the distribution flow channels is at least three, and each distribution flow channel is arranged at intervals along the extension direction of the water collecting flow channel; the two water collecting flow channels are respectively provided with openings, and the openings are located on the same side of at least two distribution flow channels along the extension direction of the water collecting flow channel. The heat exchange plate of the application sets at least two distribution flow channels in the at least three distribution flow channels on the same side of the opening, so that the flow rates in the adjacent two distribution flow channels on the same side of the opening are different, heat exchange of an external structure with different heat production amounts in different areas is facilitated, and the use scenarios of the heat exchange plate are expanded.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat exchange plates, in particular to a heat exchange plate and a battery pack comprising the same. BACKGROUND

[0002] In the prior art, the heat exchange plate is usually used to exchange heat with the external structure by the refrigerant in the heat exchange flow channel. When the external structure is in contact with the surface of the heat exchange plate and needs to exchange heat, the heat exchange working medium source injects the refrigerant into the heat exchange flow channel, and the refrigerant is diffused to the surface of the battery cell in contact with the heat exchange plate through the heat exchange flow channel, so as to exchange heat with the external structure.

[0003] In order to improve the heat exchange effect of the heat exchange plate on the external structure, the area ratio of the heat exchange flow channel in the heat exchange plate is usually increased to improve the consistency of the flow of the refrigerant in the heat exchange flow channel of each region of the heat exchange plate.

[0004] Since the external structure has different temperatures in different regions during operation, the flow of the refrigerant in each heat exchange flow channel of the heat exchange plate is relatively uniform in the prior art, and it is difficult to ensure the temperature uniformity of the external structure after heat dissipation, thereby limiting the use scenarios of the heat exchange plate. SUMMARY

[0005] In view of the above deficiencies of the prior art, the purpose of the present application is to provide a heat exchange plate with expanded use scenarios and a battery pack comprising the same. Specifically, the following technical solutions are included:

[0006] In a first aspect, the present application provides a heat exchange plate, which comprises two water collecting flow channels arranged at intervals, and a distribution flow channel connected between the two water collecting flow channels, the number of the distribution flow channels is at least three, and each distribution flow channel is arranged at intervals along the extension direction of the water collecting flow channel.

[0007] The two water collecting flow channels are respectively provided with openings, and the openings are located on the same side of at least two distribution flow channels along the extension direction of the water collecting flow channel.

[0008] The heat exchange plate of the present application is provided with two water collecting flow channels with openings, and a plurality of distribution flow channels connected between the two water collecting flow channels, so that the refrigerant of the external heat exchange working medium source can flow into the distribution flow channel through the opening, and then flow out from the other opening after heat exchange with the external structure through the distribution flow channel, thereby ensuring the heat exchange function of the heat exchange plate of the present application.

[0009] The heat exchange plate further sets the opening on the same side of the at least two branch flow channels, and forms an included angle between the extension direction of the branch flow channel and the extension direction of the collecting flow channel, so that the refrigerant in the collecting flow channel can cooperate with the branch flow channel, the refrigerant flowing from the collecting flow channel to each branch flow channel has different flow rates, so that the refrigerant flow in the adjacent branch flow channels on the same side of the opening is different, and the different surface temperatures of the external structure are matched. Further, the use scenarios of the heat exchange plate are expanded.

[0010] In an embodiment, the branch flow channels include a first branch flow channel and a second branch flow channel, and the first branch flow channel is located between the second branch flow channel and the opening along the extension direction of the collecting flow channel; the width of the first branch flow channel is less than the width of the second branch flow channel.

[0011] In an embodiment, the width of the branch flow channel ranges from 5 mm to 10 mm.

[0012] In an embodiment, a plurality of protrusions are arranged in the collecting flow channel, and the protrusions are used to slow down the flow rate in the collecting flow channel.

[0013] In an embodiment, a protrusion is arranged at the connection between each branch flow channel and the collecting flow channel, and each protrusion extends towards the corresponding branch flow channel.

[0014] In an embodiment, the protrusions include a first protrusion and a second protrusion, and the first protrusion is located between the second protrusion and the opening along the extension direction of the collecting flow channel; the protruding height of the first protrusion is less than the protruding height of the second protrusion.

[0015] In an embodiment, each collecting flow channel includes two collecting sections, and the two collecting sections are arranged on opposite sides of the opening along the extension direction of the collecting flow channel and are respectively communicated with the opening; the branch flow channels on the same side of the opening are communicated to the same collecting section.

[0016] In an embodiment, the collecting section includes a first sub-section and a second sub-section connected in parallel, the first sub-section is connected to a part of the branch flow channels close to the opening, the second sub-section is connected to another part of the branch flow channels, and the number of the branch flow channels connected to the first sub-section is greater than or equal to the number of the branch flow channels connected to the second sub-section.

[0017] In an embodiment, the width of the first sub-section is less than the width of the second sub-section.

[0018] In an embodiment, the number of the branch flow channels on the opposite sides of the opening along the extension direction of the collecting flow channel is the same.

[0019] In a second aspect, the embodiments of the present application provide a battery pack, comprising a battery tray, a battery cell, and a heat exchange plate, the battery cell is fixed to the battery tray, the heat exchange plate is located between the battery cell and the battery tray, and the extending direction of the pole of the battery cell is parallel to the water collecting flow channel of the heat exchange plate.

[0020] It can be understood that, since the battery pack provided by the second aspect of the present application adopts the heat exchange plate provided by the first aspect of the present application, it also has the beneficial effect of expanding the use scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structural schematic diagram of the battery cell provided in an embodiment of the present application;

[0022] Figure 2 A structural schematic diagram of the heat exchange plate provided in an embodiment of the present application;

[0023] Figure 3 An exploded schematic diagram of the heat exchange plate provided in an embodiment of the present application;

[0024] Figure 4 Another structural schematic diagram of the heat exchange plate provided in an embodiment of the present application;

[0025] Figure 5 A partial enlarged schematic diagram of the heat exchange plate provided in an embodiment of the present application;

[0026] Figure 6 Another partial enlarged schematic diagram of the heat exchange plate provided in an embodiment of the present application;

[0027] Figure 7 Still another structural schematic diagram of the heat exchange plate provided in an embodiment of the present application;

[0028] Figure 8 Still another structural schematic diagram of the heat exchange plate provided in an embodiment of the present application;

[0029] Figure 9 Still another partial enlarged schematic diagram of the heat exchange plate provided in an embodiment of the present application;

[0030] Figure 10 A top view structural schematic diagram of the heat exchange plate provided in an embodiment of the present application;

[0031] Figure 11 Another top view structural schematic diagram of the heat exchange plate provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] For the purpose of clarity, the present application will be described with reference to the attached drawings. The drawings provided are intended to explain the preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0033] The following description of the embodiments with reference to the accompanying drawings is provided to illustrate specific embodiments in which the present application can be implemented. The numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. As used herein, "connected", "coupled", or "linked" includes both direct and indirect connections (couplings) unless otherwise specifically stated.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly stated and limited, the terms "mounting", "connected", "coupling" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal connection of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the drawings are used to distinguish different objects and are not used to describe a specific order. In addition, the terms "include", "may include", "contain" or "may contain" used in the present application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit other one or more functions, operations, elements, etc. In addition, the terms "include" or "contain" indicate the existence of the corresponding features, numbers, steps, operations, elements, components or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components or combinations thereof, and are intended to cover non-exclusive inclusion.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application.

[0036] The embodiment of the present application provides a battery pack, which comprises a battery tray, a battery cell and a heat exchange plate. The number of the battery cell is multiple, and the battery cell is fixed in the battery tray in parallel.

[0037] The heat exchange plate is located between the battery cell and the battery tray. The heat exchange plate is also communicated with an external heat exchange working medium source, so that the refrigerant in the heat exchange working medium source can flow into the heat exchange plate through the joint on the heat exchange plate. Based on the low temperature of the refrigerant, the heat exchange plate is in contact with the surface of the battery cell. It can be understood that the temperature generated in the working process of the battery cell is transmitted to the refrigerant through the contact surface of the heat exchange plate and the battery cell, and is absorbed by the refrigerant, so that the cooling of the battery cell is realized. The heat exchange function of the heat exchange plate is realized.

[0038] It can be understood that in another embodiment, the heat exchange plate can also be arranged on the side of the battery cell away from the battery tray and attached to the battery cell. The present application does not make special limitation on this.

[0039] In order to facilitate the description, the heat exchange relationship between the heat exchange plate and the battery cell is described in the subsequent embodiments of the present application. It can be understood that in other embodiments, the heat exchange plate of the present application can also be used for other structures which can generate different temperatures on the surface.

[0040] Please refer to Figure 1 the structural schematic diagram of the battery cell 200 provided in an embodiment of the present application.

[0041] As Figure 1 shown, the battery cell 200 comprises a body part 201 and a pole 202. The pole 202 has two poles, which are arranged on the opposite sides of the body part 201 along the length direction of the battery cell 200. The pole 202 is used for connecting with an external circuit. It can be understood that the current of the external circuit can flow into the body part 201 through the two poles 202, so as to realize the charging function of the battery cell 200. On the other hand, the electric energy stored in the battery cell 200 can also flow outwards through the two poles 202, so as to realize the discharging function of the battery cell 200.

[0042] When the battery cell 200 is charged, the external current will act on the electrolyte (not shown in the figure) and the pole piece (not shown in the figure) in the battery cell 200 through the pole 202, and convert the external current into chemical energy and store it in the body part 201 under the action of the electrolyte and the pole piece. When the battery cell 200 is discharged, the electrolyte will react with the pole piece, and convert the chemical energy stored in the electrolyte into electric energy and output outward.

[0043] In the process of charging and discharging, the chemical reaction occurs in the battery cell 200. When heat is generated in the chemical reaction process of the battery cell 200, the heat may affect the charging and discharging performance of the battery cell 200.

[0044] Since the chemical reactions of the battery cell 200 are all related to the current, the pole 202 is used to realize the current transmission between the inside and outside of the battery cell 200. It can be understood that, during the working process of the battery cell 200, the heat of the end portion of the body portion 201 close to the pole 202 is higher than that of other areas of the body portion 201 away from the pole 202.

[0045] Referring to Figure 2 , a structural schematic view of the heat exchange plate 100 provided in an embodiment of the present application is shown, and referring to Figure 3 , an exploded schematic view of the heat exchange plate 100 provided in an embodiment of the present application is shown. In order to facilitate the representation of the position of the battery cell 200 on the heat exchange plate 100, Figure 2 , the position of the battery cell 200 is represented by a frame line.

[0046] As Figure 2 and Figure 3 shown, the heat exchange plate 100 of the present application comprises a flow channel plate 10, a packaging plate 20, a joint 30, and a circulating pipeline 40. The flow channel plate 10 is provided with a plurality of grooves, and the packaging plate 20 is attached to the side of the flow channel plate 10 provided with the grooves. The grooves and the packaging plate 20 cooperate to form the circulating pipeline 40.

[0047] The joint 30 is arranged on the packaging plate 20 and communicates with the circulating pipeline 40 through the packaging plate 20. The joint 30 is used to communicate with an external heat exchange working medium source to input a refrigerant into the circulating pipeline 40 and receive the refrigerant output after the circulating pipeline 40.

[0048] As Figure 2 shown, the circulating pipeline 40 is provided with one to exchange heat for a plurality of battery cells 200. It can be understood that, in other embodiments, the number of the circulating pipeline 40 can also be set to be the same as the number of the battery cells 200, so that each circulating pipeline 40 exchanges heat for a single battery cell 200.

[0049] As Figure 2 shown, the circulating pipeline 40 comprises a collecting flow channel 41 and a distributing flow channel 42. The collecting flow channel 41 is provided with two, and the two collecting flow channels 41 are arranged at intervals. The number of the distributing flow channel 42 is at least three, and each distributing flow channel 42 is arranged at intervals along the extension direction of the collecting flow channel 41.

[0050] Each of the branch flow channels 42 is in communication with the two collecting flow channels 41 to achieve communication between the two collecting flow channels 41. The refrigerant in one of the collecting flow channels 41 can flow into the other collecting flow channel 41 through the plurality of branch flow channels 42. It can be understood that the provision of the plurality of branch flow channels 42 increases the diffusion area of the refrigerant between the two collecting flow channels 41, thereby increasing the heat exchange area of the heat exchange plate 100 of the present application and improving the heat exchange efficiency of the heat exchange plate 100 of the present application.

[0051] The extension direction of each of the branch flow channels 42 is perpendicular to the extension direction of the collecting flow channels 41. It can be understood that in other embodiments, there is an included angle between the extension direction of each of the branch flow channels 42 and the extension direction of the collecting flow channels 41. The present application does not make special limitations thereon.

[0052] Among them, the two collecting flow channels 41 are provided with openings 411. Among them, along the extension direction of the collecting flow channel 41, the opening 411 is located on the same side of at least two branch flow channels 42. As Figure 2 shown, along the extension direction of the collecting flow channel 41, the opening 411 is located between the plurality of branch flow channels 42.

[0053] When the refrigerant flows in the collecting flow channel 41 in communication with the plurality of branch flow channels 42, the flow rate of the refrigerant will decrease as the flow distance increases. Since the refrigerant flowing into the opening 411 has the maximum flow rate. It can be understood that the flow rate of the refrigerant flowing to the branch flow channel 42 close to the opening 411 is greater than the flow rate of the refrigerant flowing to the branch flow channel 42 far away from the opening 411.

[0054] Since the extension direction of the collecting flow channel 41 and the extension direction of the branch flow channel 42 are perpendicular to each other, the greater the flow rate, the greater the dynamic pressure of the corresponding refrigerant and the smaller the static pressure, the greater the pressure loss in the corresponding collecting flow channel 41, and the more difficult the refrigerant flows into the branch flow channel 42. It can be understood that the flow rate of the refrigerant in the branch flow channel 42 close to the opening 411 is less than the flow rate of the refrigerant in the branch flow channel 42 far away from the opening 411.

[0055] As Figure 2 shown, the extension direction of the pole 202 of the battery cell 200 is arranged in parallel with the extension direction of the collecting flow channel 41. Since the end of the battery cell 200 close to the pole 202 has a higher heat, and the central area far away from the pole 202 has a lower heat. The greater the flow rate of the refrigerant in the branch flow channel 42, the better the heat exchange effect of the branch flow channel 42 on the battery cell 200.

[0056] It can be understood that the extension direction of the pole 202 of the battery cell 200 is arranged parallel to the extension direction of the water collecting flow channel 41, which can make the battery cell 200 contact with the plurality of shunt flow channels 42, so that the regions with different heat generation amounts on the battery cell 200 are matched with the shunt flow channels 42 with different flow rates, thereby improving the temperature uniformity of the battery cell 200. The use scenario of the heat exchange plate 100 is expanded.

[0057] As shown in Figure 2 and Figure 3 , the joint 30 includes a water inlet 31 and a water outlet 32. The circulating pipeline 40 also includes a water inlet flow channel 43 and a water outlet flow channel 44. The projection of the joint 30 on the flow channel plate 10 is located on one side of the circulating pipeline 40. The water inlet flow channel 43 is connected between one opening 411 and the water inlet 31, and the water outlet flow channel 44 is connected between the other opening 411 and the water outlet 32.

[0058] It can be understood that the refrigerant of the heat exchange working medium source can enter the water inlet flow channel 43 through the water inlet 31, and flow into the corresponding water collecting flow channel 41 through one opening 411, and enter the plurality of shunt flow channels 42. The refrigerant in the shunt flow channel 42 can exchange heat with the battery cell 200, and flow to another water collecting flow channel 41 along the extension direction of the shunt flow channel 42, and flow out of the water outlet 32 through another opening 411 and the water outlet flow channel 44, and flow back to the heat exchange working medium source. Thus, a heat exchange cycle is formed.

[0059] For ease of description, Figure 2 and subsequent drawings, the extension direction of the water collecting flow channel 41 is set as a first direction 001, and a second direction 002 is perpendicular to the first direction 001.

[0060] Specifically, please refer to Figure 4 for another structural schematic view of the heat exchange plate 100 provided in an embodiment of the present application. In order to facilitate the description of the relationship between the water collecting flow channel 41 and the shunt flow channel 42, Figure 4 the content of Figure 2 is simplified. Please refer to Figure 2 .

[0061] As shown in Figure 2 and Figure 4 , along the first direction 001, two shunt flow channels 42 located on the same side of the opening 411 are provided, and are respectively a first shunt flow channel 421 and a second shunt flow channel 422. Among them, the first shunt flow channel 421 is located between the opening 411 and the second shunt flow channel 422.

[0062] The water collecting flow channel 41 is provided with two, which are respectively a first water collecting flow channel 41a and a second water collecting flow channel 41b. As Figure 4As shown, when the flow direction of the refrigerant is from the opening 411 into the first collecting flow channel 41a, and then into the second collecting flow channel 41b through the first branch flow channel 421 and the second branch flow channel 422. In the first collecting flow channel 41a, the flow rate of the refrigerant at the connection between the first collecting flow channel 41a and the first branch flow channel 421 is greater than the flow rate of the refrigerant at the connection between the second collecting flow channel 41b and the second branch flow channel 422.

[0063] Since the extension direction of the first branch flow channel 421 and the second branch flow channel 422 is the second direction. Therefore, when the refrigerant flows from the collecting flow channel 41 into the branch flow channel 42, it needs to change the flow direction. The faster the flow rate of the refrigerant, the more energy is needed to change the flow direction, and the smaller the flow rate of the refrigerant flowing into the branch flow channel 42.

[0064] It can be understood that the flow rate of the refrigerant in the first branch flow channel 421 is smaller than the flow rate of the refrigerant in the second branch flow channel 422. That is, along the first direction 001, the flow rate of the refrigerant in the branch flow channel 42 increases with the increase of the distance between the opening 411.

[0065] As shown, Figure 4 Since the opening 411 is arranged between two adjacent branch flow channels 42, and along the first direction 001, the opening 411 is provided with a plurality of branch flow channels 42 on both sides. Along the first direction 001, the flow rate of the refrigerant in the branch flow channel 42 in the heat exchange plate 100 of the present application presents the phenomenon of high in the middle and low at both ends. Since the cell 200 also presents the phenomenon of high heat generation in the middle and low heat generation at both ends along the extension direction of the pole 202 of the cell 200.

[0066] As shown, Figure 2 Based on the extension direction of the pole 202 of the cell 200 arranged on the heat exchange plate 100 is also the first direction 001. The area close to the pole 202 of the cell 200 is close to the branch flow channel 42 with higher flow rate on the heat exchange plate 100, and the area away from the pole 202 of the cell 200 is close to the branch flow channel 42 with lower flow rate on the heat exchange plate 100. Thus, the flow rate of the refrigerant in the branch flow channel 42 can match the heat generation of the cell 200, and the surface temperature of the cell 200 after heat exchange by the heat exchange plate 100 of the present application is relatively uniform. The use scenario of the heat exchange plate 100 of the present application is expanded.

[0067] Thus, the heat exchange plate 100 provided by the application sets the opening 411 on the same side of at least two sub-flow channels 42, and makes the extension direction of the sub-flow channel 42 and the extension direction of the water collecting channel 41 form an included angle, so that the refrigerant in the water collecting channel 41 can cooperate with the sub-flow channel 42, so that the refrigerant flowing from the water collecting channel 41 to each sub-flow channel 42 has different flow rates, so that the refrigerant flow in the adjacent sub-flow channels 42 on the same side of the opening 411 is different, facilitating the matching of the different temperatures of the surface of the battery cell 200. Further expand the use scenarios of the heat exchange plate 100 of the application.

[0068] Please refer to Figure 5 the partial enlarged schematic view of the heat exchange plate 100 provided in an embodiment of the application. Please refer to Figure 4 . Among them, Figure 5 is Figure 4 the partial enlarged schematic view.

[0069] As Figure 4 and Figure 5 shown, the first sub-flow channel 421 has a first width W1, and the second sub-flow channel 422 has a second width W2. Among them, the first width W1 is less than the second width W2. Based on the greater the width of the sub-flow channel 42, the greater the refrigerant flow in the corresponding sub-flow channel 42. It can be understood that the second sub-flow channel 422 with the second width W2 greater than the first width W1 can further increase the flow difference between the first sub-flow channel 421 and the second sub-flow channel 422, thereby improving the temperature uniformity of the battery cell 200 after heat exchange via the heat exchange plate 100 of the application. Further expand the use scenarios of the heat exchange plate 100 of the application.

[0070] In an embodiment, as Figure 5 shown, the sub-flow channel 42 further includes a third sub-flow channel 423. Among them, along the first direction 001, the third sub-flow channel 423 is located between the first sub-flow channel 421 and the second sub-flow channel 422. And the third sub-flow channel 423 has a third width W3. Among them, the third width W3 is greater than the first width W1 and less than the second width W2.

[0071] It can be understood that the cooperation of the first sub-flow channel 421, the second sub-flow channel 422 and the third sub-flow channel 423 improves the flow distribution uniformity of the refrigerant in the sub-flow channel 42 of the heat exchange plate 100 along the first direction 001, further improves the temperature uniformity of the battery cell 200 after heat exchange via the heat exchange plate 100 of the application. Expand the use scenarios of the heat exchange plate 100 of the application.

[0072] In an embodiment, multiple third sub-flow channels 423 are provided, and the width of any one third sub-flow channel 423 is smaller than the width of another third sub-flow channel 423 close to the second sub-flow channel 422, and is greater than the width of another third sub-flow channel 423 close to the first sub-flow channel 421. The flow distribution uniformity of the refrigerant in the sub-flow channels 42 of the heat exchange plate 100 along the first direction 001 is further improved, and the temperature uniformity of the battery cell 200 after heat exchange by the heat exchange plate 100 is further improved. The use scenarios of the heat exchange plate 100 are expanded.

[0073] In an embodiment, the width of each sub-flow channel 42 ranges between 5mm-10mm. When the width of the sub-flow channel 42 is less than 5mm, the flow of the refrigerant in each sub-flow channel 42 is limited, which may result in the same flow of the refrigerant in multiple adjacent sub-flow channels 42, thereby affecting the flow distribution uniformity of the refrigerant in the sub-flow channels 42 of the heat exchange plate 100 along the first direction 001, and affecting the improvement of the temperature uniformity of the battery cell 200 by the heat exchange plate 100.

[0074] When the width of the sub-flow channel 42 is greater than 10mm, the number of sub-flow channels 42 connected between two water collecting channels 41 may be reduced, thereby affecting the flow distribution uniformity of the refrigerant in the sub-flow channels 42 of the heat exchange plate 100 along the first direction 001, and affecting the improvement of the temperature uniformity of the battery cell 200 by the heat exchange plate 100.

[0075] Therefore, by setting the width of each sub-flow channel 42 to range between 5mm-10mm, the heat exchange plate 100 can ensure that the flow of the refrigerant in any two adjacent sub-flow channels 42 on the same side of the opening 411 is different, thereby ensuring the flow distribution uniformity of the refrigerant in the sub-flow channels 42 of the heat exchange plate 100 along the first direction 001, improving the temperature uniformity of the battery cell 200 after heat exchange by the heat exchange plate 100, and expanding the use scenarios of the heat exchange plate 100.

[0076] In an embodiment, the width of the water collecting channel 41, the water inlet channel 43 and the water outlet channel 44 ranges between 5mm-10mm.

[0077] In an embodiment, as shown in Figure 5 two sub-flow channels 42 is greater than or equal to 5mm, which can avoid the mutual connection between the two sub-flow channels 42 during processing, thereby reducing the processing difficulty and ensuring the flow distribution of the refrigerant in the sub-flow channels 42 of the heat exchange plate 100 along the first direction 001.

[0078] It can be understood that in other embodiments, the distance between any two adjacent flow channels in the heat exchange plate 100 of the present application should be greater than or equal to 5mm, so as to reduce the processing difficulty of the heat exchange plate 100 of the present application.

[0079] Please refer to Figure 6 Another partial enlarged view of the heat exchange plate 100 provided in an embodiment of the present application is shown.

[0080] As Figure 6 shown, the water collecting flow channel 41 is provided with a protruding portion 412. The protruding portion 412 is provided with a plurality of protruding portions and extends along the second direction 002. The flow direction of the refrigerant in the water collecting flow channel 41 is along the first direction 001. It can be understood that the protruding portion 412 can block the flow of the refrigerant, so as to slow down the flow rate of the refrigerant in the water collecting flow channel 41, so as to facilitate the refrigerant to flow into each of the distribution flow channels 42.

[0081] On the other hand, the water collecting flow channel 41 is formed by the recesses provided on the surface of the flow channel plate 10 cooperating with the packaging plate 20. It can be understood that the protruding portion 412 also increases the contact area of the flow channel plate 10 and the packaging plate 20, thereby improving the structural strength of the heat exchange plate 100 of the present application.

[0082] In an embodiment, as Figure 6 shown, each of the distribution flow channels 42 and the water collecting flow channel 41 is provided with a protruding portion 412, and each of the protruding portions 412 extends towards the corresponding distribution flow channel 42. So as to reduce the refrigerant flow at the connection between the distribution flow channel 42 and the water collecting flow channel 41, so as to facilitate the refrigerant to enter the corresponding distribution flow channel 42.

[0083] Since the flow rate of the refrigerant input by the external heat exchange working medium source is relatively large. It can be understood that the protruding portion 412 is provided at the connection between the distribution flow channel 42 and the water collecting flow channel 41, which can ensure the flow rate of the refrigerant in each of the distribution flow channels 42, so as to avoid the flow rate of the refrigerant in the distribution flow channel 42 close to the opening 411 being too small due to the too large flow rate, thereby affecting the heat exchange function of the heat exchange plate 100 of the present application.

[0084] In an embodiment, as Figure 6 shown, the protruding portion 412 includes a first protruding portion 4121 and a second protruding portion 4122, and along the first direction 001, the first protruding portion 4121 is located between the second protruding portion 4122 and the opening 411.

[0085] The first protruding part 4121 has a first protruding height H1, and the second protruding part 4122 has a second protruding height H2. The first protruding height H1 is less than the second protruding height H2. The higher the protruding height, the faster the reduction rate of the flow rate of the refrigerant by the protruding part 412. It can be understood that the second protruding part 4122 with the second protruding height H2 less than the first protruding height H1 can further reduce the flow rate of the refrigerant in the water collecting flow channel 41 along the first direction 001 as the distance from the opening 411 increases, further increasing the flow rate of the refrigerant in the branch flow channel 42 away from the opening 411. Further improve the temperature uniformity of the battery cell 200 after heat exchange by the heat exchange plate 100 of the present application. Expand the use scenarios of the heat exchange plate 100 of the present application.

[0086] In one embodiment, as shown in Figure 6 At the connection between each branch flow channel 42 and the water collecting flow channel 41, a fillet is provided between the inner wall (not shown in the figure) of each branch flow channel 42 and the inner wall (not shown in the figure) of the water collecting flow channel 41. As shown in Figure 6 The fillet between the opposite sides of each branch flow channel 42 and the water collecting flow channel 41 and the protruding part 412 forms a tangent circle to avoid the protruding part 412 blocking the flow of the water collecting flow channel 41.

[0087] The diameter of the tangent circle is less than 15 mm. In order to ensure the reduction effect of the protruding part 412 on the flow rate of the refrigerant in the water collecting flow channel 41, while ensuring the flow of the refrigerant in the water collecting flow channel 41, preventing the phenomenon of the protruding part 412 blocking the water collecting flow channel 41, thereby ensuring the heat exchange effect of the heat exchange plate 100 of the present application.

[0088] Please refer to Figure 7 Another structural schematic diagram of the heat exchange plate 100 provided in one embodiment of the present application is shown.

[0089] As shown in Figure 7 Each water collecting flow channel 41 includes two water collecting sections 413. Along the first direction 001, the two water collecting sections 413 are arranged on opposite sides of the opening 411 and respectively communicate with the opening 411. The two water collecting sections 413 are respectively a first water collecting section 413a and a second water collecting section 413b. As shown in Figure 7 Along the first direction 001, the first water collecting section 413a is located between the joint 30 and the second water collecting section 413b.

[0090] It can be understood that the first water collecting section 413a and the second water collecting section 413b are both two. The branch flow channel 42 located on the side of the opening 411 close to the joint 30 communicates between the two first water collecting sections 413a, and the branch flow channel 42 located on the side of the opening 411 away from the joint 30 communicates between the two second water collecting sections 413b.

[0091] As Figure 7 shown, the water inlet flow channels 43 are provided with two, and the water outlet flow channels 44 are also provided with two. The two water inlet flow channels 43 are respectively communicated with a first water collecting section 413a and a second water collecting section 413b, and the two water outlet flow channels 44 are also respectively communicated with another first water collecting section 413a and another second water collecting section 413b.

[0092] That is, the refrigerant flow in the first water collecting section 413a and the branch flow channel communicated between the two first water collecting sections 413a is independent of the refrigerant flow in the second water collecting section 413b and the branch flow channel communicated between the two second water collecting sections 413b. Thus, the heat exchange plate 100 of the present application can realize flow control of different regions in the heat exchange plate 100 by controlling the flow in a single water collecting section 413, further expanding the use scenarios of the heat exchange plate 100 of the present application.

[0093] It can be understood that in other embodiments, the number of first water collecting sections 413a and second water collecting sections 413b can also be one each, and correspondingly, the number of water outlet flow channels 44 is one. That is, the two water inlet flow channels 43 are respectively communicated with the first water collecting section 413a and the second water collecting section 413b, and the water outlet flow channel 44 is communicated with the water collecting flow channel 41.

[0094] Please refer to Figure 8 the schematic structural view of the heat exchange plate 100 provided in an embodiment of the present application.

[0095] As Figure 8 shown, each water collecting section 413 includes a first sub-section 4131 and a second sub-section 4132. The first sub-section 4131 and the second sub-section 4132 are connected in parallel to a water inlet flow channel 43. The first sub-section 4131 is communicated with a part of the branch flow channels 42 close to the opening 411, and the second sub-section 4132 is communicated with another part of the branch flow channels 42, and the number of branch flow channels 42 communicated by the first sub-section 4131 is greater than the number of branch flow channels 42 communicated by the second sub-section 4132.

[0096] Since the first sub-section 4131 and the second sub-section 4132 are connected in parallel to the water inlet flow channel 43, the flow of refrigerant in the first sub-section 4131 is equal to the flow of refrigerant in the second sub-section 4132. It can be understood that the average flow of refrigerant of each branch flow channel 42 communicated with the first sub-section 4131 is less than the average flow of refrigerant of each branch flow channel 42 communicated with the second sub-section 4132, thereby further increasing the flow difference of refrigerant between the branch flow channels 42 close to the opening 411 and the branch flow channels 42 far from the opening 411. Further improve the temperature uniformity of the battery cell 200 after heat exchange via the heat exchange plate 100 of the present application. Expand the use scenarios of the heat exchange plate 100 of the present application.

[0097] Please see Figure 9 The diagram shown is a partial enlarged view of the heat exchange plate 100 provided in one embodiment of this application.

[0098] like Figure 9 As shown, the first segment 4131 has a fourth width W4, and the second segment 4132 has a fifth width W5. The fourth width W4 is smaller than the fifth width W5. Since a larger channel width corresponds to a larger flow rate within the channel, it is understandable that setting the fifth width W5 of the second segment 4132 to be larger than the fourth width W4 can further increase the flow rate within the branch channel 42 away from the opening 411, thereby further increasing the difference in refrigerant flow rate between the branch channel 42 near and away from the opening 411. This further improves the temperature uniformity of the battery cell 200 after heat exchange via the heat exchange plate 100 of this application, and expands the application scenarios of the heat exchange plate 100 of this application.

[0099] Please see Figure 10 The diagram shown is a top view of the heat exchange plate 100 provided in one embodiment of this application.

[0100] like Figure 10 As shown, multiple first segments 4131 are provided, and they are connected in parallel to each other on the same inlet channel 43 and the same outlet channel 44. It is understood that providing multiple first segments 4131 can ensure the heat exchange function of the heat exchange plate 100 of this application while avoiding the impact on the heat exchange effect of the heat exchange plate 100 due to damage to some of the branch channels 42. This further ensures the temperature uniformity of the battery cell 200 after heat exchange via the heat exchange plate 100 of this application.

[0101] Understandably, in another embodiment, multiple first segments 4131 adjacent to the inlet channel 43 may be configured. In other embodiments, multiple second segments 4132 may also be configured, and correspondingly, the number of branch channels 42 connected to all second segments 4132 is less than the number of branch channels 42 connected to all first segments 4131.

[0102] In one embodiment, along the first direction 001, the number of branch channels 42 on opposite sides of the opening 411 is the same. This ensures uniformity of flow rate variation in each circulation pipe 40 along the first direction 001, further improving the temperature uniformity of the battery cell 200 after heat exchange via the heat exchange plate 100 of this application. This expands the application scenarios of the heat exchange plate 100 of this application.

[0103] Please see Figure 11 The diagram shown is a top view of another embodiment of the heat exchange plate 100 provided in this application.

[0104] likeFigure 11 As shown, a plurality of circulation pipes 40 are provided and arranged along the first direction 001. Since the battery cells 200 are arranged along the second direction 002 on the battery tray, the battery cells 200 can also be arranged along the first direction 001. It can be understood that the plurality of circulation pipes 40 are arranged along the first direction 001, so that each battery cell 200 can exchange heat with one circulation pipe 40. Thus, the temperature uniformity of all battery cells 200 in the battery pack is ensured. In turn, the charge and discharge performance of the battery pack is improved. Further, the use scenarios of the heat exchange plate 100 are expanded.

[0105] As shown, the plurality of circulation pipes 40 include adjacent first and second circulation pipes 40a and 40b. The first water inlet channel 43a of the first circulation pipe 40a is adjacent to the second water outlet channel 44b of the second circulation pipe 40b, and the first water outlet channel 44a of the first circulation pipe 40a is adjacent to the second water inlet channel 43b of the second circulation pipe 40b. Figure 11 Based on the temperature of the refrigerant in the water outlet channel 44 being higher than the temperature of the refrigerant in the water inlet channel 43. It can be understood that the water inlet channel 43 and the water outlet channel 44 of the two circulation pipes 40 are adjacent, so that the refrigerant in the water inlet channel 43 absorbs the heat of the refrigerant in the water outlet channel 44, thereby increasing the temperature of the refrigerant in the water inlet channel 43 and reducing the temperature of the refrigerant in the water outlet channel 44.

[0106] Since the lower the temperature of the refrigerant, the greater the viscosity of the refrigerant, and the greater the resistance to the flow of the refrigerant. It can be understood that increasing the temperature of the refrigerant in the water inlet channel 43 can reduce the influence of the viscosity of the refrigerant on the flow of the refrigerant, thereby ensuring the flow of the refrigerant in the circulation pipe 40. In turn, the heat exchange function of the heat exchange plate 100 is ensured.

[0107] At the same time, since the refrigerant flows into the heat exchange medium source through the water outlet channel 44, the refrigerant is cooled by the external compressor. It can be understood that reducing the temperature of the refrigerant in the water outlet channel 44 can reduce the power of the external compressor and reduce energy consumption while ensuring the heat exchange function of the heat exchange plate 100.

[0108] It should be understood that the terms "first", "second", etc. are only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically limited.

[0109] ​

[0110] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate way in any one or more embodiments or examples.

[0111] It should be understood that the application of the present application is not limited to the above examples, and those of ordinary skill in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the claims of the present application. Those of ordinary skill in the art can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made in accordance with the claims of the present application still belong to the scope covered by the present application.

Claims

1. A heat exchange plate (100), characterized in that The heat exchange plate (100) is internally provided with two spaced-apart water collecting flow channels (41) and a distribution flow channel (42) communicated between the two water collecting flow channels (41), the number of the distribution flow channel (42) is at least three, and each of the distribution flow channels (42) is arranged along the extension direction of the water collecting flow channel (41); Two water collecting flow channels (41) are respectively provided with an opening (411), and the opening (411) is located on the same side of at least two distribution flow channels (42) along the extension direction of the water collecting flow channel (41); The water collecting flow channel (41) is internally provided with a plurality of protrusions (412), and the protrusions (412) are used to slow down the flow rate in the water collecting flow channel (41); each of the protrusions (412) is arranged on the flow channel wall of the water collecting flow channel (41) along the vertical direction of the extension direction of the water collecting flow channel (41); The protrusions (412) include first protrusions (4121) and second protrusions (4122), and the first protrusions (4121) are located between the second protrusions (4122) and the opening (411) along the extension direction of the water collecting flow channel (41); the protrusion height of the first protrusion (4121) is less than the protrusion height of the second protrusion (4122).

2. The heat transfer plate (100) according to claim 1, characterized in that The distribution flow channel (42) includes a first distribution flow channel (421) and a second distribution flow channel (422), and the first distribution flow channel (421) is located between the second distribution flow channel (422) and the opening (411) along the extension direction of the water collecting flow channel (41); The width of the first distribution flow channel (421) is less than the width of the second distribution flow channel (422).

3. The heat transfer plate (100) according to claim 1, characterized in that The width of the distribution flow channel (42) ranges from 5mm to 10mm.

4. The heat exchange plate (100) according to claim 1, characterized in that Each of the distribution flow channels (42) is provided with a protrusion (412) at the connection between the distribution flow channel (42) and the water collecting flow channel (41), and each of the protrusions (412) extends towards the corresponding distribution flow channel (42).

5. The heat exchanger plate (100) according to any one of claims 1-4, characterized in that Each of the water collecting flow channels (41) includes two water collecting sections (413), and the two water collecting sections (413) are arranged on the opposite sides of the opening (411) along the extension direction of the water collecting flow channel (41) and are respectively communicated with the opening (411), and the distribution flow channels (42) located on the same side of the opening (411) are communicated to the same water collecting section (413).

6. The heat transfer plate (100) according to claim 5, characterized in that The water collecting section (413) includes a first sub-section (4131) and a second sub-section (4132) connected in parallel, the first sub-section (4131) is communicated with part of the distribution flow channels (42) close to the opening (411), the second sub-section (4132) is communicated with another part of the distribution flow channels (42), and the number of the distribution flow channels (42) communicated by the first sub-section (4131) is greater than or equal to the number of the distribution flow channels (42) communicated by the second sub-section (4132).

7. The heat transfer plate (100) according to claim 6, characterized in that The width of the first sub-section (4131) is less than the width of the second sub-section (4132).

8. The heat exchange plate (100) according to any one of claims 1-4, characterized in that The number of the branch flow channels (42) on the opposite sides of the opening (411) is the same along the extending direction of the water collecting flow channel (41).

9. A battery pack, characterized by, The battery includes a battery tray, a battery cell (200), and the heat exchange plate (100) according to any one of claims 1-8, the battery cell (200) is fixed to the battery tray, the heat exchange plate (100) is located between the battery cell (200) and the battery tray, and the extending direction of the pole (202) of the battery cell (200) is parallel to the water collecting flow channel (41) of the heat exchange plate (100).

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