Cooling device, heat exchanger, battery pack, and vehicle

Abstract

The present application relates to the technical field of vehicles, and in particular to a cooling device, a heat exchanger, a battery pack, and a vehicle. The cooling device provided in the present application comprises a flow channel plate, a heat exchange plate and a header plate, wherein the flow channel plate and the header plate are arranged on two sides of the heat exchange plate, respectively; and a cooling flow channel is formed between the flow channel plate and the heat exchange plate; a header flow channel is formed in the header plate; and an inlet joint of joints is in communication with the cooling flow channel, and an outlet joint of the joints is in communication with the header flow channel. In the present application, the header plate is additionally provided, the header flow channel is formed in the header plate, the header flow channel is one cavity, the cooling flow channel is another cavity, and the inlet joint and the outlet joint are in communication with the two cavities, respectively, so that interference between inlet and outlet flow channels is avoided, and shunting of a working medium in the cooling device is more uniform.

Description

Cooling device, heat exchanger, battery pack and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent applications filed with the Patent Office of China on August 1, 2023, with application number 202322054507.2, and entitled “Cooling device, heat exchanger, battery pack and vehicle” and filed with the Patent Office of China on April 22, 2024, with application number 202420841873.4, and entitled “Cooling plate, battery pack and vehicle”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of vehicle technology, and in particular to a cooling device, a heat exchanger, a battery pack and a vehicle. Background Art

[0004] Technological advancements in new energy vehicles are placing higher demands on the performance, safety, and durability of power batteries. Good thermal management design can quickly adjust the battery to an optimal range and reduce temperature differences between cells, enabling the battery to safely complete high-power charging and discharging while avoiding the problem of individual cells experiencing rapid degradation.

[0005] Some vehicle thermal management solutions direct the refrigerant from the air conditioning circuit into the battery pack to exchange heat with the battery cells, a technique known as direct battery cooling. Direct-cooled batteries use refrigerant as the heat exchange medium, which undergoes phase change during the heat exchange process. This makes it more prone to uneven flow distribution than liquid-cooled batteries, necessitating flow diversion within the cooling battery. However, this diversion, due to the multiple flow paths, can easily lead to flow interference.

[0006] Summary of the Invention

[0007] In order to solve the above technical problems, the present application provides a cooling device, a heat exchanger, a battery pack and a vehicle.

[0008] Some embodiments of the present application provide a cooling device including a flow channel plate, a heat exchange plate, and a manifold plate;

[0009] The flow channel plate and the manifold plate are respectively arranged on both sides of the heat exchange plate;

[0010] A cooling channel is formed between the channel plate and the heat exchange plate;

[0011] The manifold is formed with a manifold channel;

[0012] The inlet joint in the joint is communicated with the cooling flow channel, and the outlet joint in the joint is communicated with the converging flow channel.

[0013] The technical solutions provided by some embodiments of the present application have the following advantages over the prior art:

[0014] Some embodiments of the present application provide a cooling device comprising a flow channel plate, a heat exchange plate, and a manifold plate; the flow channel plate and the manifold plate are respectively located on either side of the heat exchange plate, forming a cooling flow channel between the flow channel plate and the heat exchange plate; the manifold plate forms a converging flow channel; the inlet connector is connected to the cooling flow channel, and the outlet connector is connected to the converging flow channel. In some embodiments of the present application, by adding a manifold plate, the converging flow channel is formed on the manifold plate, and the converging flow channel and the cooling flow channel are respectively located on either side of the heat exchange plate, and are connected to the cooling flow channel and the converging flow channel respectively through the inlet connector and the outlet connector, thereby avoiding interference between the inlet and outlet flow channels and making the flow distribution of the working medium within the cooling device more uniform.

[0015] In some embodiments, the confluence plate includes a first connection surface facing the heat exchange plate, the first connection surface is formed with a recessed portion, and the first connection surface is connected to the heat exchange plate so that the recessed portion forms a confluence channel.

[0016] In some embodiments, the flow channel plate includes a second connecting surface facing the heat exchange plate, the second connecting surface is provided with a first groove, the second connecting surface is connected to the heat exchange plate, and a cooling flow channel is formed between the heat exchange plate and the first groove;

[0017] The recessed portion includes a second groove;

[0018] The heat exchange plate is provided with a first through hole. Along the stacking direction of the flow channel plate, the heat exchange plate and the manifold plate, the projections of the first groove, the second groove and the first through hole have an overlapping area.

[0019] In some embodiments, the manifold includes a third connection surface facing away from the heat exchange plate;

[0020] An avoidance hole is provided in the area of ​​the manifold without the recessed portion, the avoidance hole passes through the third connection surface and the first connection surface, and the inlet joint is provided in the avoidance hole and connected to the heat exchange plate;

[0021] The outlet connector is arranged on the third connection surface and connected to the manifold.

[0022] In some embodiments, the flow channel plate is formed with an extension portion, and the second connecting surface is disposed on the extension portion;

[0023] The projection of the manifold plate along the stacking direction of the flow channel plate, the heat exchange plate and the manifold plate is located at the extension portion.

[0024] In some embodiments, the cooling channel includes a diversion channel, a heat exchange channel, and a collection channel;

[0025] The flow distribution channel, the heat exchange channel and the flow collection channel are connected in sequence;

[0026] The collecting flow channel is connected with the converging flow channel;

[0027] The projections of at least part of the flow-dividing channels and at least part of the flow-collecting channels along the stacking direction of the channel plates, the heat exchange plates and the manifold plates are located on the extension portion.

[0028] In some embodiments, the heat exchange channel includes at least two sub-channels;

[0029] The sub-flow channels are respectively connected with the diverter flow channel and the collector flow channel;

[0030] The sub-channels extend along the length direction of the channel plate to the end of the channel plate and then fold back once to be connected with the collecting channel.

[0031] In some embodiments, the flow-dividing channel includes a first flow-dividing channel and a second flow-dividing channel, and the flow-collecting channel includes a first flow-collecting channel and a second flow-collecting channel;

[0032] The heat exchange channel includes a plurality of C-shaped first heat exchange channels and a plurality of C-shaped second heat exchange channels, the plurality of first heat exchange channels are arranged at intervals, and the plurality of second heat exchange channels are arranged at intervals;

[0033] Both ends of the first heat exchange channel are respectively connected to the first flow diversion channel and the first flow collection channel;

[0034] Both ends of the second heat exchange channel are communicated with the second flow-dividing channel and the second flow-collecting channel respectively.

[0035] In some embodiments, the number of the second flow diversion channels is two, and the two second flow diversion channels are symmetrical about the center line in the width direction of the channel plate;

[0036] And / or, the number of the first flow collecting channels is two, and the two first flow collecting channels are symmetrical about the center line in the width direction of the channel plate;

[0037] And / or, the number of the second flow collecting channels is two, and the two second flow collecting channels are symmetrical about a center line in the width direction of the channel plate.

[0038] In some embodiments, at least some of the sub-channels have different cross-sectional areas.

[0039] According to the cooling device of some embodiments of the present application, the heat exchange plate and the flow channel plate form a plate body, the plate body is provided with a cooling flow channel, the plate body has a first through hole and a third through hole connected to the cooling flow channel, and there are at least two first through holes and / or third through holes; a first flow channel and a second flow channel are provided in the joint, the joint has a total liquid outlet connected to the first flow channel and a total liquid inlet connected to the second flow channel, the first flow channel is connected to all the first through holes, and the second flow channel is connected to all the third through holes.

[0040] According to the cooling device of some embodiments of the present application, at least two third through holes are formed on the plate body, and / or at least two first through holes are formed on the plate body, the first flow channel of the joint is connected to all the first through holes, and the second flow channel is connected to all the third through holes, so that the cooling device can form a total liquid outlet and a total liquid inlet, ensuring that the cooling device of this embodiment is compatible with the existing cooling system. Among them, at least two third through holes and / or first through holes are provided on the plate body, and combined with the design of the joint, it is equivalent to integrating part of the flow path for converging the direct cooling flow channels in the plate body on the joint, so that when designing the direct cooling flow channels in the plate body, there are fewer other flow paths required for converging the direct cooling flow channels in the plate body, and thus the design of the cooling flow channels in the plate body is more flexible, and a direct cooling flow channel with a larger distribution area can be designed.

[0041] In some embodiments, the heat exchange plate and the flow channel plate are fixedly connected to form a cooling flow channel, and the heat exchange plate is provided with a first through hole and a third through hole.

[0042] In some embodiments, the cooling device also includes a busbar, which is connected between the plate body and the joint. The busbar has a collecting hole and a diverter hole connected to the collecting channel. The collecting hole is connected to the first channel. There are at least two first through holes, and the diverter holes are connected to the first through holes one by one.

[0043] In some embodiments, the busbar includes a first plate and a second plate opposite to each other along the thickness direction of the plate body. The first plate and the second plate are fixedly connected and enclosed to form a busbar flow channel. A diversion hole is provided on the first plate, and a collecting hole is provided on the second plate. The first plate is connected to the plate body, and the second plate is connected to the joint.

[0044] In some embodiments, a surface of the first plate facing away from the second plate is provided with positioning sleeves corresponding to the diversion holes one by one, the positioning sleeves are arranged around the corresponding diversion holes, and the positioning sleeves are plugged into the corresponding first through holes.

[0045] In some embodiments, the axial direction of the total liquid outlet hole forms an angle with the axial direction of the first through hole, and the axial direction of the total liquid inlet hole forms an angle with the axial direction of the third through hole.

[0046] In some embodiments, the connector further comprises a first opening communicating with the first flow channel and a third opening communicating with the second flow channel, the first opening communicating with the first through hole, and the third opening communicating with the third through hole;

[0047] The axial directions of the first opening and the third opening are consistent, the axial directions of the total liquid outlet and the total liquid inlet are consistent, and the axial direction of the first opening is perpendicular to the axial direction of the total liquid outlet.

[0048] In some embodiments, the cooling channel includes a diversion channel, a cooling converging channel and a plurality of direct cooling channels, the diversion channel corresponds one-to-one to and is connected with the first through hole, the diversion channel is connected with at least two direct cooling channels, the cooling converging channel corresponds one-to-one to and is connected with the third through hole, and the cooling converging channel is connected with at least two direct cooling channels.

[0049] In some embodiments, each direct cooling flow channel includes a first flow path, a second flow path, and a third flow path connected in sequence, the first flow path and the third flow path both extend along a first direction, the second flow path extends along a second direction, and the first direction is at an angle to the second direction; the diversion flow channel includes at least one first-level diversion flow channel, each first-level diversion flow channel is connected to multiple first flow paths, and the cooling converging flow channel is connected to multiple third flow paths.

[0050] In some embodiments, there are multiple primary diversion flow channels, and the diversion flow channels further include at least one multi-stage diversion flow channel, and the multi-stage diversion flow channels are connected to all primary diversion flow channels;

[0051] The multi-stage diversion channel with the highest number of stages is located in the middle of the plate in the second direction and is connected to the first through hole. The multiple first-stage diversion channels are symmetrically distributed on both sides of the multi-stage diversion channel in the second direction.

[0052] In some embodiments, the cooling convergence channel includes a first-level cooling convergence channel and a multi-level cooling convergence channel. There are at least two first-level cooling convergence channels, and each first-level cooling convergence channel is connected to at least two third channels; the multi-level cooling convergence channel is connected to all first-level cooling convergence channels, and the multi-level cooling convergence channel with the highest number of levels is located in the middle of the plate in the second direction and is connected to the third through hole. Multiple first-level cooling convergence channels are symmetrically distributed on both sides of the multi-level cooling convergence channel in the second direction.

[0053] In some embodiments, a plurality of mounting holes are provided on the plate body, and the mounting holes penetrate the plate body along the thickness direction of the plate body. Cooling channels are provided on both sides of the mounting holes in the width direction of the plate body, and the cooling channels include bending sections for avoiding the mounting holes.

[0054] Some embodiments of the present application provide a heat exchanger comprising the cooling devices of some of the above embodiments.

[0055] Some embodiments of the present application provide a battery pack, comprising the heat exchange device of some of the above embodiments.

[0056] Some embodiments of the present application provide a vehicle comprising a battery pack according to some of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate some embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0058] In order to more clearly illustrate some embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0059] Figure 1 is a schematic diagram of the structure of a battery pack.

[0060] FIG2 is a schematic structural diagram of a cooling device according to some embodiments of the present application.

[0061] FIG3 is a schematic diagram of a partial structure of a cooling device according to some embodiments of the present application.

[0062] FIG4 is a cross-sectional view of the center joint installation structure of the cooling device according to some embodiments of the present application.

[0063] FIG5 is a schematic structural diagram of a heat exchange plate in a cooling device according to some embodiments of the present application.

[0064] FIG6 is a schematic diagram of the corresponding positions of the manifold and the heat exchange plate in the cooling device of some embodiments of the present application.

[0065] FIG. 7 is a schematic diagram of a cooling device according to some embodiments of the present application.

[0066] FIG8 is a schematic diagram of a flow channel plate in a cooling device according to some embodiments of the present application.

[0067] FIG9 is a partially enlarged view of a flow channel plate in a cooling device according to some embodiments of the present application.

[0068] FIG10 is an exploded view of a plate in a cooling device according to some embodiments of the present application.

[0069] FIG11 is a schematic diagram of a busbar in a cooling device according to some embodiments of the present application.

[0070] FIG12 is another schematic diagram of a busbar in a cooling device according to some embodiments of the present application.

[0071] FIG13 is a schematic diagram of a joint in a cooling device according to some embodiments of the present application.

[0072] Reference numerals: 1, cooling device; 2, box structure; 3 (31, 32, 33), cell group; 11, flow channel plate; 12, heat exchange plate; 121, first through hole; 122, third through hole; 13, busbar; 131, second groove; 132, second through hole; 133, busbar; 134, second plate; 135, collecting hole; 136, first plate; 137, diverter hole; 138, positioning sleeve; 14, connector; 141, inlet connector; 142, Outlet connector; 143, first flow channel; 1431, total liquid outlet; 144, second flow channel; 1441, total liquid inlet; 15-plate; 151, first flow channel; 152, second flow channel; 153, third flow channel; 154, first-stage diverter flow channel; 155, second-stage diverter flow channel; 156, first-stage cooling converging flow channel; 157, second-stage cooling converging flow channel; 158, direct flow area; 159, diverter area; 110, cooling flow channel; 111, first diverter flow channel; 1111. The first sub-channel of the first diversion channel; 1112. The second sub-channel of the first diversion channel; 1113. The third sub-channel of the first diversion channel; 112. The second diversion channel; 1121. The first sub-channel of the second diversion channel; 1122. The second sub-channel of the second diversion channel; 1123. The third sub-channel of the second diversion channel; 113. The first collecting channel; 1131. The first sub-channel of the first collecting channel; 1132. The second sub-channel of the first collecting channel; 1133. The third sub-channel of the first collecting channel; 114. The second collecting channel; 1141. The first sub-channel of the second collecting channel; 1142. The second sub-channel of the second collecting channel; 1143. The third sub-channel of the second collecting channel; 115. The mounting hole. DETAILED DESCRIPTION

[0073] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, some embodiments of the present application and features in some embodiments can be combined with each other.

[0074] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; it is obvious that some embodiments in the specification are only part of the embodiments of the present application, rather than all the embodiments.

[0075] With the technological advancement of new energy vehicles, higher requirements are being placed on the power, safety, and durability of power batteries. A good thermal management design can quickly adjust the battery to an appropriate range and reduce the temperature difference between the cells, allowing the battery to complete high-power charging and discharging in a safe state while avoiding the problem of individual cells attenuating too quickly. In some vehicle thermal management solutions, the refrigerant from the air-conditioning circuit is directly introduced into the battery pack to complete the heat exchange with the battery cells, which is a battery direct cooling technology. Direct-cooling batteries use refrigerant as a heat exchange medium, and phase change will occur during the heat exchange process. Compared with liquid-cooled batteries, they are more prone to uneven diversion. Therefore, the cooling battery needs to be diverted. After diversion, due to the large number of flow channels, flow channel interference is prone to occur.

[0076] As battery direct cooling technology matures, more and more power battery assembly products are adopting direct cooling technology. The performance requirements of direct cooling plates are much higher than those of traditional liquid cooling plates, especially for normal working pressure resistance, which is 10 times higher than that of liquid cooling plates. Cold plates using direct cooling technology usually achieve the confluence of various direct cooling channels inside the cold plate to form a total third through hole outside the cold plate that is connected to the cooling system. However, this setting makes the flow path design inside the cold plate complicated and also limits the design and distribution area of ​​the direct cooling channels.

[0077] As shown in Figures 1 to 10, the cooling device 1 provided in the embodiment of the present application includes a flow channel plate 11, a heat exchange plate 12 and a convergence plate 13; the flow channel plate 11 and the convergence plate 13 are respectively arranged on both sides of the heat exchange plate 12; a cooling flow channel 110 is formed between the flow channel plate 11 and the heat exchange plate 12; the convergence channel 133 is formed on the convergence plate 13; the inlet connector 141 in the connector 14 is connected to the cooling flow channel 110, and the outlet connector 142 in the connector 14 is connected to the convergence channel 133.

[0078] The cooling device 1 provided in the embodiment of the present application is provided with a confluence plate 13 by adding a confluence plate 13, and the confluence plate 13 is formed with a confluence channel 133. The confluence channel 133 forms a cavity, and the cooling channel 110 forms a cavity. The confluence channel 133 and the cooling channel 110 are respectively located on both sides of the heat exchange plate 12, and are connected to the cooling channel 110 and the confluence channel 133 through the inlet joint and the outlet joint respectively, so as to avoid interference between the inlet and outlet channels and make the diversion of the working medium in the cooling device more uniform.

[0079] In some embodiments of the present application, the conduit plate 13 forms a conduit channel with the heat exchange plate 12 through the recessed portion thereon. Detailed description of some embodiments of the present application is as follows.

[0080] In some embodiments of the present application, in combination with Figures 1, 2, 3, 4, 5 and 6, the cooling device 1 includes a flow channel plate 11, a heat exchange plate 12 and a convergence plate 13; the flow channel plate 11 and the convergence plate 13 are respectively arranged on both sides of the heat exchange plate 12; a cooling flow channel 110 is formed between the flow channel plate 11 and the heat exchange plate 12; the convergence plate 13 includes a first connecting surface facing the heat exchange plate 12, and a recessed portion is formed on the first connecting surface. The first connecting surface is connected to the heat exchange plate 12 so that the recessed portion forms a convergence flow channel 133; the inlet joint 141 is connected to the cooling flow channel 110, and the outlet joint 142 is connected to the convergence flow channel 133. In some embodiments of the present application, a convergent plate 13 is added to form a convergent channel between the recessed portion of the convergent plate 13 and the heat exchange plate 12, the convergent channel 133 forms a cavity, and the cooling channel 110 forms a cavity. The convergent channel 133 and the cooling channel 110 are respectively located on both sides of the heat exchange plate 12, and are connected to the cooling channel 110 and the convergent channel 133 through the inlet joint and the outlet joint respectively, avoiding interference between the inlet and outlet channels, so that the working medium is more evenly distributed in the cooling device.

[0081] In some specific embodiments, the flow channel plate 11 includes a second connection surface facing the heat exchange plate 12. The second connection surface is provided with a first groove, which connects to the heat exchange plate 12, forming a cooling channel 110 between the heat exchange plate 12 and the first groove. The recessed portion includes a second groove 131. The heat exchange plate 12 is provided with a first through-hole 121. Along the stacking direction of the flow channel plate 11, the heat exchange plate 12, and the confluence plate 13, the projections of the first and second grooves 131 and the first through-hole 121 overlap. The cooling channel 110 and the confluence channel 133 are located on the upper and lower sides of the heat exchange plate 12, respectively. They are connected to the cooling channel 110 and the confluence channel 133 through an inlet connector 141 and an outlet connector 142, respectively. This prevents interference between the inlet and outlet channels and ensures more uniform flow distribution of the working fluid within the cooling device.

[0082] In some specific embodiments, the manifold 13 includes a third connection surface facing away from the heat exchange plate 12. A relief hole is provided in the area of ​​the manifold 13 without the recessed portion. The relief hole extends through the third connection surface and the first connection surface. An inlet connector 141 is disposed in the relief hole and connected to the heat exchange plate 12. An outlet connector 142 is disposed on the third connection surface and connected to the manifold 13. The inlet connector 141 and the outlet connector 142 are connected to the cooling channel 110 and the converging channel 133, respectively, to avoid interference between the inlet and outlet channels and to achieve more uniform flow distribution of the working medium within the cooling device.

[0083] The application of the cooling device described in some embodiments of the present application in a power battery pack is shown in Figure 1. The battery pack includes a cooling device 1, a box structure 2, and a cell group 3. Among them, the cells are square shell cells, arranged in 6 rows along the y direction shown in Figure 1. The battery pack is defined as symmetrical about the middle plane parallel to the xz plane, so cell group 31, cell group 32, and cell group 33 all have symmetrical cell groups about the symmetry plane of the battery pack. The following mainly describes the features on one side of the symmetry plane.

[0084] The exploded view of the cooling device is shown in Figure 2, which mainly includes a flow channel plate 11, a heat exchange plate 12, a manifold 13, and a joint 14. The flow channel plate 11 is a stamping and brazing process to form a first groove, which is the main flow channel feature of the cooling device, and its main function is to organize the flow of the refrigerant inside the battery pack. The heat exchange plate 12 is a flat plate, which is connected to the flow channel plate 11 by brazing to form a flow channel cavity. The flow channel plate 11 and the heat exchange plate 12 both contain multiple punching features to complete the connection with the battery case. The manifold 13 is a brazing process and is connected to the heat exchange plate 12 by brazing. In addition, the cooling device includes an inlet joint 141 and an outlet joint 142, which can be connected to the flow channel plate 11 and the manifold 13 respectively by brazing or laser welding. The inlet joint 141 and the outlet joint 142 can both be water nozzles.

[0085] Detailed features near the inlet connector 141 and outlet connector 142 of the cooling device are shown in Figure 3. The inlet connector 141 passes through the second through-hole 132 on the manifold 13 and is welded to the heat exchange plate 12. The heat exchange plate 12 includes multiple first through-holes 121. The refrigerant passes through the inlet connector 141 and enters the cavity of the cooling channel 110 formed by the heat exchange plate 12 and the manifold plate 11, as shown in Figure 4. The refrigerant enters the cooling channel 110, exchanges heat with the battery cells within the battery pack, and then enters the converging channel 133 formed by the manifold 13 and the heat exchange plate 12 through the first through-hole 121. The manifold 13 includes a second, π-shaped, stamped groove 131, which allows the refrigerant in the converging channel 133 to converge at the outlet connector 142 and exit the battery pack.

[0086] In some specific embodiments, the cooling channel 110 includes a diverter channel, a heat exchange channel and a collecting channel; the diverter channel, the heat exchange channel and the collecting channel are connected in sequence; the collecting channel is connected to the converging channel 133; at least part of the diverter channel and at least part of the collecting channel are projected along the stacking direction of the channel plate 11, the heat exchange plate 12 and the converging plate 13 in the extension part.

[0087] By connecting the inlet connector 141 to the shunt channel and the outlet connector 142 to the converging channel 133, interference of the channels can be avoided, making the diversion of the working fluid in the cooling device more uniform. Specifically, the working fluid enters the shunt channel from the inlet connector 141, and enters the heat exchange channel after being diverted from the shunt channel. Then, it flows along the heat exchange channel into the collecting channel, and then flows from the collecting channel into the converging channel 133, and finally is discharged from the outlet connector 142. By designing the converging plate 13, the battery inlet connector 141 and the outlet connector 142 are moved to the outside of the battery pack, which saves the internal layout space of the battery pack and avoids the complex design and weight cost of the direct cooling pipeline. The diversion characteristics of the flow channel are concentrated near the inlet connector 141, which can divert the refrigerant at low dryness and improve the flow uniformity.

[0088] In some specific embodiments, the heat exchange channel includes at least two sub-channels, each of which is connected to the flow-dividing channel and the flow-collecting channel. By using multiple sub-channels, a C-shaped sub-channel is formed below each row of battery cells, thereby achieving more uniform temperature among the cells within the battery cell group.

[0089] In some specific embodiments, the diverter channel includes a first diverter channel 111 and a second diverter channel 112, and the collecting channel includes a first collecting channel 113 and a second collecting channel 114; the heat exchange channel includes a plurality of C-shaped first heat exchange channels and a plurality of C-shaped second heat exchange channels, the plurality of first heat exchange channels are arranged at intervals, and the plurality of second heat exchange channels are arranged at intervals; the two ends of the first heat exchange channel are respectively connected to the first diverter channel 111 and the first collecting channel 113; the two ends of the second heat exchange channel are respectively connected to the second diverter channel 112 and the second collecting channel 114.

[0090] As shown in FIG5 , the flow-dividing channel includes a first flow-dividing channel 111 and a second flow-dividing channel 112. The flow-collecting channel includes a first flow-collecting channel 113 and a second flow-collecting channel 114.

[0091] The first heat exchange channel includes: the first sub-channel 1111 of the first diverging channel and the first sub-channel 1141 of the second collecting channel connected to each other; the second sub-channel 1112 of the first diverging channel and the second sub-channel 1142 of the second collecting channel connected to each other; the third sub-channel 1113 of the first diverging channel and the third sub-channel 1143 of the second collecting channel connected to each other, etc.

[0092] The second heat exchange channel includes: the first sub-channel 1121 of the second branch channel and the first sub-channel 1131 of the first collecting channel connected to each other; the second sub-channel 1122 of the second branch channel and the second sub-channel 1132 of the first collecting channel connected to each other; the third sub-channel 1123 of the second branch channel and the third sub-channel 1133 of the first collecting channel connected to each other, etc.

[0093] The cooling channel 110 passes through the first branch channel 111 and the second branch channel 112 from the left side of the figure and enters the first sub-channel 1111 of the first branch channel, the second sub-channel 1112 of the first branch channel, the third sub-channel 1113 of the first branch channel, the first sub-channel 1121 of the second branch channel, the second sub-channel 1122 of the second branch channel, and the third sub-channel 1123 of the second branch channel; after reaching the right side of the cold plate along the x direction, it turns back and then goes along the x direction. It returns to the first sub-channel 1141 of the second collecting channel, the second sub-channel 1142 of the second collecting channel, the third sub-channel 1143 of the second collecting channel, the first sub-channel 1131 of the first collecting channel, the second sub-channel 1132 of the first collecting channel, the third sub-channel 1133 of the first collecting channel, and finally enters the confluent channel 133 through the second collecting channel 114 and the first collecting channel 113, and finally is discharged from the outlet joint 142 of the confluent channel 133.

[0094] Specifically, as shown in FIG5 , the refrigerant flows from the inlet joint 141 into the first branch channel 111, the second branch channel 112, and the symmetrical channel of the second branch channel 112. The first branch channel 111 is divided into the first sub-channel 1111 of the first branch channel, the second sub-channel 1112 of the first branch channel, the third sub-channel 1113 of the first branch channel, and the symmetrical channel thereof; the second branch channel 112 is divided into the first sub-channel 1121 of the second branch channel, the second sub-channel 1122 of the second branch channel, and the third sub-channel 1123 of the second branch channel; after reaching the right side of the cold plate along the x direction, it turns back and then returns along the x direction. It returns to the first sub-channel 1141 of the second collecting channel, the second sub-channel 1142 of the second collecting channel, the third sub-channel 1143 of the second collecting channel, the first sub-channel 1131 of the first collecting channel, the second sub-channel 1132 of the first collecting channel, the third sub-channel 1133 of the first collecting channel, and finally enters the confluent channel 133 through the second collecting channel 114 and the first collecting channel 113, and finally is discharged from the outlet joint 142 of the confluent channel 133.

[0095] The same applies to the symmetrical flow channels of the second diversion channel 112. Each sub-channel flows from the left side to the right side in the figure, avoiding the mounting hole 115 in the middle, and bends in a C shape on the right side and returns to the left side. The first sub-channel 1141 of the second collecting channel, the second sub-channel 1142 of the second collecting channel, and the third sub-channel 1143 of the second collecting channel converge into the second collecting channel 114 and the first sub-channel 1131 of the first collecting channel; the second sub-channel 1132 of the first collecting channel and the third sub-channel 1133 of the first collecting channel converge into the first collecting channel 113, and then converge to the outlet through the converging channel 133.

[0096] Thus, the first sub-channel 1111 of the first diverter channel, the second sub-channel 1112 of the first diverter channel, and the third sub-channel 1113 of the first diverter channel correspond to cell group 31; the first sub-channel 1121 of the second diverter channel, the second sub-channel 1122 of the second diverter channel, and the third sub-channel 1123 of the second diverter channel correspond to cell group 32; and the first sub-channel 1131 of the first collecting channel, the second sub-channel 1132 of the first collecting channel, and the third sub-channel 1133 of the first collecting channel correspond to cell group 33. Taking the cooling condition as an example, in cell group 31, the bottom channel of the cell at the far left in FIG. 5 has a total of six sub-channels. The working fluid in three of these channels is closest to the diverter channel, corresponding to the lowest working fluid temperature, and the working fluid in three of these channels is farthest from the inlet, corresponding to the highest working fluid temperature. This approach allows the average temperature of the refrigerant beneath each cell in cell group 31 to be close, which is beneficial for temperature uniformity among the cells. The same applies to cell groups 32 and 33.

[0097] Preferably, the first and second diversion channels 111 and 112 are diverted to the characteristic locations of the sub-channels close to the inlet connector 141, with no battery cells arranged above them. This way, the refrigerant does not undergo heat exchange with the battery cells before diversion, thereby maintaining a low dryness and facilitating uniform diversion.

[0098] In some specific embodiments, the sub-channels extend along the length of the channel plate 11 to the end of the channel plate 11, then fold back once before connecting to the manifold. The design of the manifold 13 achieves uniform refrigerant flow distribution, and a C-shaped curved channel design for each column of cells ensures temperature uniformity across each row and column of cells. This design removes the inlet and outlet connectors 142 from the battery pack, saving internal space and avoiding the complex design and weight penalty of piping.

[0099] In some specific embodiments, the cooling channel 110 is symmetrical about a center line of the channel plate 11 in the width direction.

[0100] In some specific embodiments, the number of the second diversion channels 112 is two, and the two second diversion channels 112 are symmetrical about the center line of the width direction of the channel plate 11; and / or, the number of the first collecting channels 113 is two, and the two first collecting channels 113 are symmetrical about the center line of the width direction of the channel plate 11; and / or, the number of the second collecting channels 114 is two, and the two second collecting channels 114 are symmetrical about the center line of the width direction of the channel plate 11.

[0101] In some specific embodiments, at least some of the sub-flow channels have different cross-sectional areas. The non-uniform cross-sectional areas of the first diverter channel 111, the second diverter channel 112, the first collecting channel 113, and the second collecting channel 114 can be achieved by varying the channel width or the stamping depth of the first groove. This allows for uniform flow within each sub-flow channel, thereby improving temperature uniformity across the battery cells.

[0102] In some specific embodiments, the manifold plate 11 is formed with an extension, and the second connection surface is located in the extension. The projection of the manifold plate 13 along the stacking direction of the manifold plate 11, heat exchange plate 12, and manifold 13 is located in the extension. The inlet connector 141 and the outlet connector 142 are both located in the extension. This design removes the inlet and outlet connectors 142 from the battery pack, saving internal space and avoiding the complex design and weight penalty of the piping.

[0103] Optionally, the C-shaped features of the first sub-channel 1111 of the first diversion channel, the second sub-channel 1112 of the first diversion channel, and the third sub-channel 1113 of the first diversion channel are moved rightward to the edge of the cold plate to provide cooling for the electrical connection assembly in the battery.

[0104] Optionally, the number of flow channels under each battery cell group is not limited to 6, and the width, height and number of the flow channels can be adjusted according to the y-direction size of the battery cell, the pressure resistance and flow resistance requirements of the direct cooling plate.

[0105] Optionally, the axes of the inlet connector 141 and the outlet connector 142 may deviate from the center line to accommodate different external water pipe connection requirements.

[0106] Optionally, the axes of the inlet connector 141 and the outlet connector 142 are in the same yz plane to save space occupied by the battery in the x direction.

[0107] In some embodiments of the present application, two plates in the busbar 13 enclose a busbar flow channel. Detailed descriptions of some embodiments of the present application are as follows.

[0108] The cooling device provided according to some embodiments of the present application is described below with reference to Figures 7 to 13.

[0109] According to some embodiments of the present application, a cooling device includes a plate body 15 and a connector 14. The plate body 15 includes a heat exchange plate 12 and a flow channel plate 11. A cooling flow channel 110 is provided in the plate body 15. The plate body 15 has a first through hole 121 and a third through hole 122 that communicate with the cooling flow channel 110. There are at least two first through holes 121 and / or third through holes 122. A first flow channel 143 and a second flow channel 144 are provided in the connector 14. The connector 14 has a total liquid outlet 1431 that communicates with the first flow channel 143 and a total liquid inlet 1441 that communicates with the second flow channel 144. The first flow channel 143 communicates with all of the first through holes 121, and the second flow channel 144 communicates with all of the third through holes 122.

[0110] According to some embodiments of the present application, the cooling device is formed with at least two third through holes 122 on the plate body 15, and / or at least two first through holes 121 on the plate body 15, the first flow channel 143 of the connector 14 connects all the first through holes 121, and the second flow channel 144 connects all the third through holes 122, so that the cooling device can form a total liquid outlet 1431 and a total liquid inlet 1441, ensuring that the cooling device of this embodiment is compatible with the existing cooling system. Among them, at least two third through holes 122 and / or first through holes 121 are provided on the plate body 15, and combined with the design of the connector 14, it is equivalent to integrating part of the flow path for converging the direct cooling flow channels in the plate body 15 on the connector 14, thereby when designing the direct cooling flow channels 110 in the plate body 15, there are fewer other flow paths required for converging the direct cooling flow channels in the plate body 15, and thus the design of the cooling flow channels 110 in the plate body 15 is more flexible, and a direct cooling flow channel with a larger distribution area can be designed.

[0111] It should be noted that the plate body 15 may be provided with one first through hole 121 and multiple third through holes 122, multiple first through holes 121 and one third through hole 122, or multiple first through holes 121 and multiple third through holes 122. The greater the number of first through holes 121 and third through holes 122, the lower the requirements for the confluence of the direct cooling flow channels within the plate body 15, and the number of flow channels for confluence can be designed to be smaller, and the distribution area is correspondingly smaller.

[0112] In some embodiments, as shown in Figures 7, 11 and 12, the cooling device also includes a busbar 13, which is connected between the plate body 15 and the joint 14. A busbar 13 is provided with a busbar flow channel. The busbar 13 has a collecting hole 135 and a diverter hole 137 connected to the busbar flow channel. The collecting hole 135 is connected to the first flow channel 143. There are at least two first through holes 121, and the diverter holes 137 are connected to the first through holes 121 one by one.

[0113] Specifically, when there are multiple first through-holes 121, the manifold 13 can be configured such that the diverter holes 137 correspond to and communicate with the first through-holes 121 one by one, thereby enabling the manifold 13 to converge the multiple first through-holes 121. In this case, the first flow channel 143 of the connector 14 is connected to the collecting hole 135 to achieve communication with all the first through-holes 121. In this case, the connector 14 only needs to have one opening connecting the first flow channel 143 and the collecting hole 135, resulting in a simple structure and easy installation.

[0114] Specifically, as shown in FIG7 and FIG10 , the number of the first through holes 121 is three, the number of the third through hole 122 is one, and the plate body 15 , the busbar 13 and the joint 14 are connected to each other in pairs.

[0115] It should be noted that the number of third through holes 122 can also be set to multiple. In this case, the conduit plate 13 converges all the third through holes 122, so that the second flow channel 144 of the connector 14 only needs to communicate with all the third through holes 122 through one opening.

[0116] In some embodiments, as shown in FIG10 , the heat exchange plate 12 and the flow channel plate 11 are fixedly connected to form a cooling channel 110 . The heat exchange plate 12 is provided with a first through hole 121 and a third through hole 122 .

[0117] The first through hole 121 and the third through hole 122 are formed simply and conveniently on the heat exchange plate 12. At this time, the manifold 13 is connected to the heat exchange plate 12 to achieve communication between the diversion hole 137 and the first through hole 121, and the joint 14 is connected to the heat exchange plate 12 to achieve communication between the third opening and the third through hole 122. The installation difficulty of the manifold 13 and the joint 14 on the plate body 15 is low.

[0118] Specifically, the heat exchange plate 12 is a plain plate, while the flow plate 11 is formed by stamping or blow molding with a flow channel opening at the top. The heat exchange plate 12 is snapped onto the top of the flow plate 11 to close the upper opening of the flow channel, thereby forming the space in the flow channel 110. The outer dimensions of the heat exchange plate 12 and the flow plate 11 are consistent to facilitate docking and positioning. The heat exchange plate 12 and the flow plate 11 are connected by brazing.

[0119] It should be noted that the connector 14 can be integrally formed, or can include a first adapter portion and a second adapter portion that are detachable or in a separated state, and the first flow channel 143 and the second flow channel 144 are respectively formed on the first adapter portion and the second adapter portion.

[0120] In some embodiments, as shown in Figures 11 and 12, the manifold 13 includes a first plate 136 and a second plate 134 that are opposed to each other along the thickness direction of the plate body 15. The first plate 136 and the second plate 134 are fixedly connected and enclose a converging flow channel. The first plate 136 is provided with a diverter hole 137, and the second plate 134 is provided with a collecting hole 135. The first plate 136 is connected to the plate body 15, and the second plate 134 is connected to the joint 14.

[0121] That is, the busbar 13 is generally a flat plate structure. On the basis of ensuring the flow rate in the busbar 13, the size of the busbar 13 along the third direction can be designed to be smaller, so that the maximum thickness of the cooling device is lower, thereby effectively saving space in the height direction of the vehicle and effectively improving the integration of the battery pack.

[0122] Specifically, the second plate 134 is fastened to the first plate 136 and brazed to the first plate 136. Furthermore, the first plate 136 is in contact with the heat exchange plate 12 of the plate body 15 and brazed to it, while the second plate 134 is in contact with the joint 14 and brazed to it. One of the first plate 136 and the second plate 134 is formed with a manifold by stamping or inflation molding, while the other is a bare plate. When the heat exchange plate 12 is fastened to the flow channel plate 11, the space between the manifolds forms a converging flow channel.

[0123] In some embodiments, as shown in Figure 10, the surface of the first plate 136 facing away from the second plate 134 is provided with positioning sleeves 138 corresponding one-to-one with the diversion holes 137. The positioning sleeves 138 are arranged around the corresponding diversion holes 137, and the positioning sleeves 138 are inserted into the corresponding first through holes 121.

[0124] When installing the manifold 13 onto the plate body 15, multiple positioning sleeves 138 are respectively fitted into the corresponding first through holes 121 until the first plate 136 and the heat exchange plate 12 are in contact with each other, which means that the docking and positioning of the two are completed, and the installation accuracy after brazing is high.

[0125] Specifically, the axial dimension of the positioning sleeve 138 is preferably less than or equal to the thickness of the heat exchange plate 12 to prevent at least a portion of the positioning sleeve 138 from extending into the cooling channel 110 and affecting the flow of the cooling medium in the cooling channel 110 .

[0126] In some embodiments, the axial direction of the total liquid outlet hole 1431 forms an angle with the axial direction of the first through hole 121 , and the axial direction of the total liquid inlet hole 1441 forms an angle with the axial direction of the third through hole 122 .

[0127] At this time, when the connector 14 is connected to the pipeline of the external cooling system through the total liquid outlet hole 1431 and the total liquid inlet hole 1441, the pipeline does not need to be directly above the connector 14. Based on the high integration of the battery pack, the pipeline is less restricted by space during installation, the difficulty of pipeline installation is low, and the installation process requirements of the cooling system are effectively reduced.

[0128] Specifically, as shown in Figures 7 and 13, connector 14 further has a first opening communicating with first flow channel 143 and a third opening communicating with second flow channel 144. The first opening communicates with first through-hole 121, and the third opening communicates with third through-hole 122. The first and third openings are axially aligned, while the main liquid outlet hole 1431 and the main liquid inlet hole 1441 are axially aligned. The first opening is axially perpendicular to the main liquid outlet hole 1431.

[0129] On the basis that the axial directions of the first through hole 121, the third through hole 122 and the collecting hole 135 are vertical, the axial directions of the total liquid outlet hole 1431 and the total liquid inlet hole 1441 are horizontal, thereby greatly reducing the difficulty of connecting the connector 14 with the pipeline of the external cooling system, and effectively improving the integration of the battery pack.

[0130] In some embodiments, the cooling channel 110 includes a diversion channel, a cooling converging channel and a plurality of direct cooling channels. The diversion channel corresponds one-to-one to and is connected with the first through hole 121, the diversion channel is connected with at least two direct cooling channels, the cooling converging channel corresponds one-to-one to and is connected with the third through hole 122, and the cooling converging channel is connected with at least two direct cooling channels.

[0131] By providing multiple direct cooling channels, a uniform cooling effect is ensured over a larger area of ​​the plate 15. The diversion channels and cooling converging channels initially converge the direct cooling channels, facilitating the formation of a smaller number or distribution of first and third through-holes 121 and 122 on the plate 15, further simplifying the connection between the external manifold plate 13 and connector 14 and the plate 15.

[0132] In some embodiments, as shown in Figures 8 and 9, each direct cooling channel includes a first flow path 151, a second flow path 152, and a third flow path 153 connected in sequence. The first flow path 151 and the third flow path 153 both extend in a first direction, and the second flow path 152 extends in a second direction. The first direction and the second direction are angled. The diverter channel includes at least one primary diverter channel 154. Each primary diverter channel 154 is connected to multiple first flow paths 151, and the cooling converging channel is connected to multiple third flow paths 153.

[0133] Multiple first flow paths 151 and multiple second flow paths 152 spaced apart along the second direction form a DC region 158, the primary heat dissipation area. Due to the characteristics of the direct cooling medium (R434a, tetrafluoroethane), the cooling medium undergoes phase change and heat exchange within the flow path, leaving it in an uncertain state (gas or gas-liquid mixture). A shunt design would make it impossible to determine the cooling medium's flow, resulting in uneven heat dissipation across the battery cells. However, the cooling medium is not shunted when passing through DC region 158, effectively ensuring uniform heat dissipation across the battery cell module.

[0134] At the same time, each first-level branch flow channel 154 is connected to multiple first flow paths 151, and the cooling converging flow channel is connected to multiple third flow paths 153, thereby realizing the confluence of multiple direct cooling flow channels, so as to facilitate the formation of a smaller number or smaller distribution area of ​​liquid inlets and outlets on the plate body 15.

[0135] Specifically, the plate 15 has a diversion region 159 and a direct current region 158 arranged along a first direction. The primary diversion flow channel 154 is distributed in the diversion region 159, and there are multiple direct cooling flow channels distributed in the direct current region 158. The battery cell modules placed on the plate 15 correspond to the direct current region 158 on the plate 15. The first direction is the length of the plate 15, and the second direction is the width of the plate 15. Multiple first flow paths 151 and multiple second flow paths 152 are arranged at equal intervals along the second direction. All flow paths in the direct current region 158 are arranged in a mirror-symmetrical manner relative to the centerline of the plate 15 along the first direction.

[0136] In some embodiments, there are multiple primary diverter channels 154, each of which further includes at least one multi-stage diverter channel, which is connected to all primary diverter channels 154. The multi-stage diverter channel with the highest number of stages is located in the middle of the plate body 15 in the second direction and is connected to the first through hole 121. The multiple primary diverter channels 154 are symmetrically distributed on both sides of the multi-stage diverter channel in the second direction.

[0137] In the case where there are a large number of first flow paths 151, a larger number of first flow paths 151 can be connected simultaneously through a first-level diversion channel 154, and a larger number of first-level diversion channels 154 can be connected simultaneously through a multi-level diversion channel to form an appropriate number of first through holes 121. At the same time, the design of the multi-level diversion channel with the highest number of levels being located in the middle of the plate body 15 in the second direction allows multiple first through holes 121 to be gathered in a smaller area, thereby making the area of ​​the first plate 136 of the busbar 13 smaller, that is, the volume of the busbar 13 can be designed to be smaller, effectively reducing the manufacturing cost of the cooling device. At the same time, the design of multiple first-level diversion channels 154 symmetrically distributed on both sides of the multi-level diversion channel in the second direction reduces the difficulty of manufacturing the first-level diversion channel 154.

[0138] Specifically, the multi-stage diversion flow channel includes a secondary diversion flow channel 155, and there are at least four primary diversion flow channels 154. Each secondary diversion flow channel 155 corresponds to at least two primary diversion flow channels 154. The multiple secondary diversion flow channels 155 extend along the first direction and are located in the middle of the plate body 15 in the second direction. Alternatively, the multi-stage diversion flow channel can also include a tertiary diversion flow channel or a quaternary diversion flow channel. For example, multiple secondary diversion flow channels 155 are connected to the first through hole 121 through a tertiary diversion flow channel, or multiple tertiary diversion flow channels are connected to the first through hole 121 through a quaternary diversion flow channel.

[0139] For example, as shown in Figures 8-10, the width of each position in the cooling channel 110 is the same, one first-level diversion channel 154 corresponds to three first flow paths 151, one second-level diversion channel 155 corresponds to two first-level diversion channels 154, there are three second-level diversion channels 155, and there are three first through holes 121 correspondingly and arranged at intervals along the second direction.

[0140] It should be noted that the flow rates of the various flow paths can be flexibly distributed by designing the cross-sectional dimensions of the first through holes 121 .

[0141] In some embodiments, as shown in Figures 8 and 9, the cooling confluence flow channel includes a primary cooling confluence flow channel 156 and a multi-stage cooling confluence flow channel. There are at least two primary cooling confluence flow channels 156, and each primary cooling confluence flow channel 156 is connected to at least two third flow paths 153. The multi-stage cooling confluence flow channel is connected to all primary cooling confluence flow channels 156. The multi-stage cooling confluence flow channel with the highest number of stages is located in the middle of the plate body 15 in the second direction and is connected to the third through hole 122. Multiple primary cooling confluence flow channels 156 are symmetrically distributed on both sides of the multi-stage cooling confluence flow channel in the second direction.

[0142] When there are a large number of third flow paths 153, a larger number of third flow paths 153 can be connected simultaneously through a first-level cooling confluence channel 156, and a larger number of first-level cooling confluence channels 156 can be connected simultaneously through a multi-level cooling confluence channel to form an appropriate number of third through holes 122. At the same time, the design of the multi-level cooling confluence channel with the highest number of levels being located in the middle of the plate body 15 in the second direction allows the multiple third through holes 122 to be concentrated in a smaller area, thereby making the area of ​​the first plate 136 of the confluence plate 13 smaller, that is, the volume of the confluence plate 13 can be designed to be smaller, effectively reducing the manufacturing cost of the cooling device. At the same time, the design of multiple first-level cooling confluence channels 156 symmetrically distributed on both sides of the multi-level cooling confluence channel in the second direction reduces the difficulty of manufacturing the first-level cooling confluence channel 156.

[0143] Specifically, the primary cooling confluence channels 156 all extend along the second direction, and the multi-stage cooling confluence channels include a secondary cooling confluence channel 157 extending along the first direction. The third through-hole 122 is located at the center of the secondary cooling confluence channel 157 along its length. Preferably, the third through-hole 122 is located at the center of the heat exchange plate 12 in the second direction and adjacent to the first through-hole 121. Alternatively, the multi-stage cooling confluence channels may include a tertiary cooling confluence channel or a quaternary cooling confluence channel, such as multiple secondary cooling confluence channels 157 communicating with the third through-hole 122 via a tertiary cooling confluence channel, or multiple tertiary cooling confluence channels communicating with the third through-hole 122 via a single quaternary cooling confluence channel.

[0144] For example, the secondary cooling converging flow channel 157 has one U-shaped flow channel, the U-shaped opening direction is consistent with the first direction, and the third through hole 122 is located at the center position of the secondary cooling converging flow channel 157 along its length direction.

[0145] In some embodiments, a plurality of mounting holes 115 are provided on the plate body 15 , and the mounting holes 115 penetrate the plate body 15 along the thickness direction of the plate body 15 . Cooling channels 110 are provided on both sides of the mounting holes 115 in the width direction of the plate body 15 , and the cooling channels 110 include a bending section for avoiding the mounting holes 115 .

[0146] The cooling device is connected to the battery pack's battery case via a threaded member passing through mounting hole 115. This allows for easy assembly and disassembly of the cooling device from the battery case, and provides a strong connection between the two. Cooling channel 110 is designed with a curved section to avoid mounting hole 115, ensuring that the mounting hole 115's design does not affect the distribution density of other parts of cooling channel 110, thereby ensuring better cooling efficiency for the cooling device.

[0147] 8 , mounting holes 115 penetrate the heat exchange plate 12 and the flow channel plate 11 of the plate body 15. There are three mounting holes 115 located in the middle of the plate body 15 along its length and spaced apart along its width.

[0148] The heat exchanger provided in some embodiments of the present application includes the cooling device provided in some embodiments of the present application.

[0149] In some embodiments, the cooling device includes a flow channel plate 11, a heat exchange plate 12 and a convergence plate 13; the flow channel plate 11 and the convergence plate 13 are respectively arranged on both sides of the heat exchange plate 12; a cooling flow channel 110 is formed between the flow channel plate 11 and the heat exchange plate 12; the convergence plate 13 includes a first connecting surface facing the heat exchange plate 12, and the first connecting surface is formed with a recessed portion. The first connecting surface is connected to the heat exchange plate 12 so that the recessed portion forms a convergence flow channel 133; the inlet joint 141 is connected to the cooling flow channel 110, and the outlet joint 142 is connected to the convergence flow channel 133.

[0150] In some specific embodiments, the flow channel plate 11 includes a second connecting surface facing the heat exchange plate 12, the second connecting surface is provided with a first groove, the second connecting surface is connected to the heat exchange plate 12, and a cooling flow channel 110 is formed between the heat exchange plate 12 and the first groove; the recessed portion includes a second groove 131; the heat exchange plate 12 is provided with a through hole 121, and along the stacking direction of the flow channel plate 11, the heat exchange plate 12 and the manifold 13, the projections of the first groove and the second groove 131 and the through hole 121 have an overlapping area.

[0151] In some specific embodiments, the busbar 13 includes a third connecting surface facing away from the heat exchange plate 12; an avoidance hole is provided in the area of ​​the busbar 13 where no recess is provided, the avoidance hole passes through the third connecting surface and the first connecting surface, the inlet joint 141 is provided in the avoidance hole and connected to the heat exchange plate 12; the outlet joint 142 is provided in the third connecting surface and connected to the busbar 13.

[0152] In some specific embodiments, the flow channel plate 11 is formed with an extension portion, and the second connection surface is provided at the extension portion; the projection of the manifold 13 along the stacking direction of the flow channel plate 11, the heat exchange plate 12 and the manifold 13 is located at the extension portion.

[0153] In some specific embodiments, the cooling channel 110 includes a diverter channel, a heat exchange channel and a collecting channel; the diverter channel, the heat exchange channel and the collecting channel are connected in sequence; the collecting channel is connected to the converging channel 133; at least part of the diverter channel and at least part of the collecting channel are projected along the stacking direction of the channel plate 11, the heat exchange plate 12 and the converging plate 13 in the extension part.

[0154] In some specific embodiments, the heat exchange channel includes at least two sub-channels; the sub-channels are respectively connected to the branch channel and the collecting channel; the sub-channels extend along the length direction of the channel plate to the end of the channel plate and then fold back once to be connected to the collecting channel.

[0155] In some specific embodiments, the diverter channel includes a first diverter channel 111 and a second diverter channel 112, and the collecting channel includes a first collecting channel 113 and a second collecting channel 114; the heat exchange channel includes a plurality of C-shaped first heat exchange channels and a plurality of C-shaped second heat exchange channels, the plurality of first heat exchange channels are arranged at intervals, and the plurality of second heat exchange channels are arranged at intervals; the two ends of the first heat exchange channel are respectively connected to the first diverter channel 111 and the first collecting channel 113; the two ends of the second heat exchange channel are respectively connected to the second diverter channel 112 and the second collecting channel 114.

[0156] In some specific embodiments, the number of the second diversion channels 112 is two, and the two second diversion channels 112 are symmetrical about the center line of the width direction of the channel plate 11; and / or, the number of the first collecting channels 113 is two, and the two first collecting channels 113 are symmetrical about the center line of the width direction of the channel plate 11; and / or, the number of the second collecting channels 114 is two, and the two second collecting channels 114 are symmetrical about the center line of the width direction of the channel plate 11.

[0157] In some specific embodiments, at least some of the sub-channels have different cross-sectional areas.

[0158] In some embodiments, the cooling device includes: a plate body 15, a cooling channel 110 is provided in the plate body 15, the plate body 15 has a first through hole 121 and a third through hole 122 connected to the cooling channel 110, and there are at least two first through holes 121 and / or third through holes 122; a connector 14, a first flow channel 143 and a second flow channel 144 are provided in the connector 14, the connector 14 has a total liquid outlet 1431 connected to the first flow channel 143 and a total liquid inlet 1441 connected to the second flow channel 144, the first flow channel 143 is connected to all the first through holes 121, and the second flow channel 144 is connected to all the third through holes 122.

[0159] In some specific embodiments, the plate body 15 includes a heat exchange plate 12 and a flow channel plate 11, the heat exchange plate 12 and the flow channel plate 11 are fixedly connected, the heat exchange plate 12 and the flow channel plate 11 enclose a cooling channel 110, and a first through hole 121 and a third through hole 122 are provided on the heat exchange plate 12.

[0160] In some specific embodiments, the cooling device also includes a busbar 13, which is connected between the plate body 15 and the joint 14. A busbar 13 is provided with a busbar flow channel. The busbar 13 has a collecting hole 135 and a diverter hole 137 connected to the busbar flow channel. The collecting hole 135 is connected to the first flow channel 143. There are at least two first through holes 121, and the diverter holes 137 are connected to the first through holes 121 one by one.

[0161] In some specific embodiments, the manifold 13 includes a first plate 136 and a second plate 134 that are opposed to each other along the thickness direction of the plate body 15. The first plate 136 and the second plate 134 are fixedly connected and enclose a converging flow channel. The first plate 136 is provided with a diversion hole 137, and the second plate 134 is provided with a collecting hole 135. The first plate 136 is connected to the plate body 15, and the second plate 134 is connected to the joint 14.

[0162] In some specific embodiments, a surface of the first plate 136 facing away from the second plate 134 is provided with positioning sleeves 138 corresponding one to one with the diversion holes 137 . The positioning sleeves 138 are arranged around the corresponding diversion holes 137 and are plugged into the corresponding first through holes 121 .

[0163] In some specific embodiments, the axial direction of the total liquid outlet hole 1431 forms an angle with the axial direction of the first through hole 121 , and the axial direction of the total liquid inlet hole 1441 forms an angle with the axial direction of the third through hole 122 .

[0164] In some specific embodiments, the connector 14 further has a first opening communicating with the first flow channel 143 and a third opening communicating with the second flow channel 144. The first opening communicates with the first through hole 121, and the third opening communicates with the third through hole 122. The first and third openings are axially aligned, the main liquid outlet 1431 and the main liquid inlet 1441 are axially aligned, and the first opening is axially perpendicular to the main liquid outlet 1431.

[0165] In some specific embodiments, the cooling channel 110 includes a diversion channel, a cooling converging channel and a plurality of direct cooling channels. The diversion channel corresponds one-to-one to and is connected with the first through hole 121, the diversion channel is connected with at least two direct cooling channels, the cooling converging channel corresponds one-to-one to and is connected with the third through hole 122, and the cooling converging channel is connected with at least two direct cooling channels.

[0166] In some specific embodiments, each direct cooling channel includes a first flow path 151, a second flow path 152, and a third flow path 153 connected in sequence. The first flow path 151 and the third flow path 153 both extend in a first direction, and the second flow path 152 extends in a second direction. The first direction and the second direction are angled. The diverter channel includes at least one primary diverter channel 154. Each primary diverter channel 154 is connected to multiple first flow paths 151. The cooling converging channel is connected to multiple third flow paths 153.

[0167] In some specific embodiments, there are multiple primary diverter channels 154, and the diverter channels further include at least one multi-stage diverter channel, which is connected to all primary diverter channels 154. The multi-stage diverter channel with the highest number of stages is located in the middle of the plate body 15 in the second direction and is connected to the first through hole 121. The multiple primary diverter channels 154 are symmetrically distributed on both sides of the multi-stage diverter channel in the second direction.

[0168] In some specific embodiments, the cooling confluence flow channel includes a primary cooling confluence flow channel 156 and a multi-stage cooling confluence flow channel. There are at least two primary cooling confluence flow channels 156, and each primary cooling confluence flow channel 156 is connected to at least two third flow paths 153. The multi-stage cooling confluence flow channel is connected to all primary cooling confluence flow channels 156. The multi-stage cooling confluence flow channel with the highest number of stages is located in the middle of the plate body 15 in the second direction and is connected to the third through hole 122. Multiple primary cooling confluence flow channels 156 are symmetrically distributed on both sides of the multi-stage cooling confluence flow channel in the second direction.

[0169] In some specific embodiments, a plurality of mounting holes 115 are provided on the plate body 15 , and the mounting holes 115 penetrate the plate body 15 along the thickness direction of the plate body 15 . Cooling channels 110 are provided on both sides of the mounting holes 115 in the width direction of the plate body 15 , and the cooling channels 110 include a bending section for avoiding the mounting holes 115 .

[0170] The battery pack provided in some embodiments of the present application includes the heat exchange device provided in some embodiments. The vehicle provided in some embodiments of the present application includes the battery pack provided in some embodiments.

[0171] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or device. In the absence of further limitations, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0172] The above are merely specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to these embodiments herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A cooling device, characterized in that: Including flow channel plate, heat exchange plate and manifold plate; The flow channel plate and the manifold plate are respectively arranged on both sides of the heat exchange plate; A cooling channel is formed between the channel plate and the heat exchange plate; The busbar is formed with a bus channel; The inlet joint in the joint is communicated with the cooling flow channel, and the outlet joint in the joint is communicated with the converging flow channel.

2. The cooling device according to claim 1, characterized in that: The confluence plate includes a first connection surface facing the heat exchange plate, a recessed portion is formed on the first connection surface, and the first connection surface is connected to the heat exchange plate so that the recessed portion forms the confluence channel.

3. The cooling device according to claim 2, characterized in that: The flow channel plate comprises a second connection surface facing the heat exchange plate, the second connection surface is provided with a first groove, the second connection surface is connected to the heat exchange plate, and the cooling flow channel is formed between the heat exchange plate and the first groove; The recessed portion includes a second groove; The heat exchange plate is provided with a first through hole, and along the stacking direction of the flow channel plate, the heat exchange plate and the manifold plate, the projections of the first groove, the second groove and the first through hole have an overlapping area.

4. The cooling device according to claim 2, characterized in that: The busbar includes a third connection surface facing away from the heat exchange plate; The region of the manifold without the recessed portion is provided with an avoidance hole, the avoidance hole passes through the third connection surface and the first connection surface, and the inlet joint is provided in the avoidance hole and connected to the heat exchange plate; The outlet joint is arranged on the third connection surface and connected to the manifold.

5. The cooling device according to claim 3, characterized in that: The flow channel plate is formed with an extension portion, and the second connecting surface is arranged on the extension portion; A projection of the busbar along a stacking direction of the flow channel plate, the heat exchange plate, and the busbar is located at the extending portion.

6. The cooling device according to claim 5, characterized in that: The cooling channel includes a flow-dividing channel, a heat-exchanging channel and a flow-collecting channel; The flow-dividing channel, the heat-exchanging channel and the flow-collecting channel are connected in sequence; The collecting flow channel is in communication with the converging flow channel; Projections of at least a portion of the flow-dividing channels and at least a portion of the flow-collecting channels along the stacking direction of the flow channel plates, the heat exchange plates, and the collector plates are located on the extending portion.

7. The cooling device according to claim 6, characterized in that: The heat exchange flow channel includes at least two sub-flow channels; The sub-flow channels are respectively connected to the flow-dividing flow channel and the flow-collecting flow channel; The sub-channels extend along the length direction of the channel plate to the end of the channel plate and then fold back once before being communicated with the collecting channel.

8. The cooling device according to claim 7, characterized in that: The flow-dividing channel includes a first flow-dividing channel and a second flow-dividing channel, and the flow-collecting channel includes a first flow-collecting channel and a second flow-collecting channel; The heat exchange flow channel comprises a plurality of C-shaped first heat exchange channels and a plurality of C-shaped second heat exchange channels, the plurality of the first heat exchange channels are arranged at intervals, and the plurality of the second heat exchange channels are arranged at intervals; Two ends of the first heat exchange channel are respectively connected to the first flow dividing channel and the first flow collecting channel; Two ends of the second heat exchange channel are respectively communicated with the second flow-dividing channel and the second flow-collecting channel.

9. The cooling device according to claim 8, characterized in that: The number of the second flow diversion channels is two, and the two second flow diversion channels are symmetrical about the center line of the flow channel plate in the width direction; And / or, the number of the first flow collecting channels is two, and the two first flow collecting channels are symmetrical about the midline of the flow channel plate in the width direction; And / or, the number of the second flow collecting channels is two, and the two second flow collecting channels are symmetrical about a center line in the width direction of the flow channel plate.

10. The cooling device according to claim 7, characterized in that: At least some of the sub-channels have different cross-sectional areas.

11. The cooling device according to claim 1, characterized in that: The heat exchange plate and the flow channel plate form a plate body, a cooling flow channel is arranged in the plate body, the plate body has a first through hole and a third through hole communicating with the cooling flow channel, and there are at least two first through holes and / or third through holes; The joint is provided with a first flow channel and a second flow channel, and the joint has a total liquid outlet hole connected to the first flow channel and a total liquid inlet hole connected to the second flow channel, the first flow channel is connected to all the first through holes, and the second flow channel is connected to all the third through holes.

12. The cooling device according to claim 11, characterized in that The heat exchange plate and the flow channel plate are fixedly connected, the heat exchange plate and the flow channel plate are enclosed to form the cooling flow channel, and the heat exchange plate is provided with the first through hole and the third through hole.

13. The cooling device according to claim 11, characterized in that: The busbar is connected between the plate body and the joint, and has a collecting hole and a diverting hole connected to the busbar flow channel. The collecting hole is connected to the first flow channel. There are at least two first through holes, and the diverting holes are connected to the first through holes in a one-to-one correspondence.

14. The cooling device according to claim 13, characterized in that The busbar plate includes a first plate and a second plate opposite to each other along the thickness direction of the plate body, the first plate and the second plate are fixedly connected and enclosed to form the busbar flow channel, the first plate is provided with the diversion hole, the second plate is provided with the collecting hole, the first plate is connected to the plate body, and the second plate is connected to the joint.

15. The cooling device according to claim 14, characterized in that A surface of the first plate facing away from the second plate is provided with positioning sleeves corresponding to the diversion holes one by one, the positioning sleeves are arranged around the corresponding diversion holes, and the positioning sleeves are plugged and fitted in the corresponding first through holes.

16. The cooling device according to claim 13, characterized in that: The axial direction of the total liquid outlet hole forms an angle with the axial direction of the first through hole, and the axial direction of the total liquid inlet hole forms an angle with the axial direction of the third through hole.

17. The cooling device according to claim 16, characterized in that The joint further comprises a first opening communicating with the first flow channel and a third opening communicating with the second flow channel, the first opening communicating with the first through hole, and the third opening communicating with the third through hole; The axial directions of the first opening and the third opening are consistent, the axial directions of the total liquid outlet and the total liquid inlet are consistent, and the axial direction of the first opening is perpendicular to the axial direction of the total liquid outlet.

18. The cooling device according to claim 11, characterized in that The cooling channel includes a diverter channel, a cooling converging channel and a plurality of direct cooling channels. The diverter channel corresponds one-to-one to and is connected with the first through hole, the diverter channel is connected with at least two of the direct cooling channels, the cooling converging channel corresponds one-to-one to and is connected with the third through hole, and the cooling converging channel is connected with at least two of the direct cooling channels.

19. The cooling device according to claim 18, characterized in that Each of the direct cooling channels comprises a first flow path, a second flow path and a third flow path connected in sequence, the first flow path and the third flow path both extend along a first direction, the second flow path extends along a second direction, and the first direction forms an angle with the second direction; The flow branching channel includes at least one primary flow branching channel, each of the primary flow branching channel is communicated with a plurality of the first flow paths, and the cooling converging flow channel is communicated with a plurality of the third flow paths.

20. The cooling device according to claim 19, characterized in that There are a plurality of primary flow diversion channels, and the flow diversion channels further include at least one multi-stage flow diversion channel, and the multi-stage flow diversion channel is connected with all the primary flow diversion channels; The multi-stage flow diversion channel with the highest number of stages is located in the middle of the plate body in the second direction and is connected to the first through hole, and the plurality of primary flow diversion channels are symmetrically distributed on both sides of the multi-stage flow diversion channel in the second direction.

21. The cooling device according to claim 19, characterized in that The cooling confluence flow channel comprises: a primary cooling converging flow channel, wherein there are at least two primary cooling converging flow channels, and each of the primary cooling converging flow channels is connected to at least two of the third flow paths; and A multi-stage cooling confluence flow channel, wherein the multi-stage cooling confluence flow channel is connected to all the first-stage cooling confluence flow channels, the multi-stage cooling confluence flow channel with the highest number of stages is located in the middle of the plate body in the second direction and is connected to the third through hole, and multiple first-stage cooling confluence flow channels are symmetrically distributed on both sides of the multi-stage cooling confluence flow channel in the second direction.

22. The cooling device according to any one of claims 11 to 21, characterized in that: The plate body is provided with a plurality of mounting holes, the mounting holes penetrate the plate body along the thickness direction of the plate body, the mounting holes are provided with the cooling channels on both sides of the plate body in the width direction, and the cooling channels include bending sections for avoiding the mounting holes.

23. A heat exchanger, characterized in that: A cooling device comprising the cooling device according to any one of claims 1 to 22.

24. A battery pack, characterized in that: Includes the heat exchange device as claimed in claim 23.

25. A vehicle, characterized in that: A battery pack comprising the battery pack of claim 24.

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