WO2025026142A1 - Cooling device, heat exchanger, battery pack, and vehicle - Google Patents

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

CROSS-REFERENCE TO RELATED APPLICATIONS

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

Technical Field

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

With the technological advancement of new energy vehicles, higher requirements are placed on the power, safety and durability of power batteries. Good thermal management design can quickly adjust the battery to an appropriate range and reduce the temperature difference between 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 in the air conditioning circuit is directly introduced into the battery pack to complete the heat exchange with the battery cell, which is the direct cooling technology of the battery. Direct cooling batteries use refrigerant as the heat exchange medium, and phase change will occur during the heat exchange process. Compared with liquid-cooled batteries, it is more likely to have uneven flow distribution. Therefore, it is necessary to shunt the cooling battery. After shunting, due to the large number of flow channels, flow channel interference is likely to occur.

Summary of the invention

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

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

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 manifold is formed with a manifold 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.

Compared with the prior art, the technical solutions provided by some embodiments of the present application have the following advantages:

The cooling device provided in some embodiments of the present application includes a flow channel plate, a heat exchange plate and a confluence plate; the flow channel plate and the confluence plate are respectively located on both sides of the heat exchange plate, and a cooling flow channel is formed between the flow channel plate and the heat exchange plate; the confluence plate is formed with a confluence flow channel; the inlet joint is connected to the cooling flow channel, and the outlet joint is connected to the confluence flow channel. In some embodiments of the present application, a confluence flow channel is formed by adding a confluence plate, and the confluence flow channel and the cooling flow channel are respectively located on both sides of the heat exchange plate, and are respectively connected to the cooling flow channel and the confluence flow channel through the inlet joint and the outlet joint, so as to avoid interference between the inlet and outlet flow channels and make the flow distribution of the working medium in the cooling device more uniform.

In some embodiments, the busbar includes a first connection surface facing the heat exchange plate, a recess is formed on the first connection surface, and the first connection surface is connected to the heat exchange plate so that the recess forms a busbar flow channel.

In some embodiments, the flow channel plate includes 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 a 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 collector plate, the projections of the first groove, the second groove and the first through hole have an overlapping area.

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

An avoidance hole is provided in the area of the manifold without the recessed portion, the avoidance hole penetrates 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 connector is arranged on the third connection surface and connected to the manifold.

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

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 part.

In some embodiments, the cooling channel includes a flow-dividing channel, a heat-exchanging channel, and a flow-collecting channel;

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

The collecting flow channel is connected with the converging flow channel;

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 flow channel plates, the heat exchange plates and the collector plates are located at the extension portion.

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

The sub-flow channels are respectively connected with 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 to communicate with the collecting channel.

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;

The heat exchange flow 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;

Two ends of the first heat exchange channel are respectively connected to the first flow dividing channel and the first flow collecting channel;

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

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 flow channel plate;

And/or, the number of the first flow collecting channels is two, and the two first flow collecting channels are symmetrical about the midline in the width direction of the channel plate;

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.

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

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 a 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.

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 connects all the first through holes, and the second flow channel connects 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 set on the plate body, combined with the design of the joint, which 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 cooling flow channels in the plate body to form the direct cooling flow channels, there are fewer other flow paths in the plate body required for converging the direct cooling flow channels, 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.

In some embodiments, 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 a cooling flow channel, and the heat exchange plate is provided with a first through hole and a third through hole.

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

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.

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.

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.

In some embodiments, the joint further has 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 hole and the total liquid inlet hole are consistent, and the axial direction of the first opening is perpendicular to the axial direction of the total liquid outlet hole.

In some embodiments, 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 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.

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.

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 channel is connected to all primary diversion flow 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 multiple primary flow diversion channels are symmetrically distributed on both sides of the multi-stage flow diversion channel in the second direction.

In some embodiments, the cooling confluence flow channel includes a primary cooling confluence flow channel and a multi-stage cooling confluence flow channel, there are at least two primary cooling confluence flow channels, each primary cooling confluence flow channel is connected to at least two third flow paths; the multi-stage cooling confluence flow channel The flow channel is connected to all the first-level cooling confluence flow channels. The multi-level cooling confluence flow channel with the highest number of levels is located in the middle of the plate body in the second direction and is connected to the third through hole. Multiple first-level cooling confluence flow channels are symmetrically distributed on both sides of the multi-level cooling confluence flow channel in the second direction.

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.

Some embodiments of the present application provide a heat exchanger, comprising the cooling device of some of the above embodiments.

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

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

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.

In order to more clearly illustrate some embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

FIG1 is a schematic diagram of the structure of a battery pack.

FIG. 2 is a schematic diagram of the structure of a cooling device according to some embodiments of the present application.

FIG. 3 is a schematic diagram of a partial structure of a cooling device according to some embodiments of the present application.

FIG. 4 is a cross-sectional view of a center joint installation structure of a cooling device according to some embodiments of the present application.

FIG. 5 is a schematic diagram of the structure of a heat exchange plate in a cooling device according to some embodiments of the present application.

FIG. 6 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.

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

FIG. 8 is a schematic diagram of a flow channel plate in a cooling device according to some embodiments of the present application.

FIG. 9 is a partial enlarged view of a flow channel plate in a cooling device according to some embodiments of the present application.

FIG. 10 is an exploded view of a plate in a cooling device according to some embodiments of the present application.

FIG. 11 is a schematic diagram of a busbar in a cooling device according to some embodiments of the present application.

FIG. 12 is another schematic diagram of a busbar in a cooling device according to some embodiments of the present application.

FIG. 13 is a schematic diagram of a joint in a cooling device according to some embodiments of the present application.

Reference numerals: 1, cooling device; 2, box structure; 3 (31, 32, 33), battery 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, joint; 141, inlet joint; 142, Outlet connector; 143, first flow channel; 1431, total liquid outlet; 144, second flow channel; 1441, total liquid inlet; 15-plate body; 151, first flow channel; 152, second flow channel; 153, third flow channel; 154, primary flow channel; 155, secondary flow channel; 156, primary cooling converging flow channel; 157, secondary cooling converging flow channel; 158, direct flow area; 159, flow channel; 110, cooling flow channel; 111, first flow channel; 1111, the first sub-channel of the first branch channel; 1112, the second sub-channel of the first branch channel; 1113, the third sub-channel of the first branch channel; 112, the second branch channel; 1121, the first sub-channel of the second branch channel; 1122, the second sub-channel of the second branch channel; 1123, the third sub-channel of the second branch 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

In order to more clearly understand the above-mentioned purposes, 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.

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

With the technological advancement of new energy vehicles, higher requirements are placed on the power, safety, and durability of power batteries. Good thermal management design can quickly adjust the battery to an appropriate range and reduce the temperature difference between the cells, so that the battery can 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 in the air-conditioning circuit is directly introduced into the battery pack to complete the heat exchange with the battery cell, which is the battery direct cooling technology. Direct-cooled batteries use refrigerant as a heat exchange medium, and phase changes 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.

As the battery direct cooling technology solution gradually matures, more and more power battery assembly products have adopted direct cooling technology. The performance requirements of direct cooling plates are much higher than those of traditional liquid cooling plates, especially for normal working compressive strength, which is 10 times the compressive strength 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 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.

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 joint 141 in the joint 14 is connected to the cooling flow channel 110, and the outlet joint 142 in the joint 14 is connected to the convergence channel 133.

The cooling device 1 provided in the embodiment of the present application is provided with a confluence plate 13, wherein the confluence plate 13 is provided with a confluence channel 133, wherein 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 respectively connected to the cooling channel 110 and the confluence channel 133 through an inlet joint and an outlet joint, so as to avoid interference between the inlet and outlet channels and make the flow distribution of the working fluid in the cooling device more uniform.

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.

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, 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. In some embodiments of the present application, a confluence plate 13 is added to form a confluence channel between the recessed portion of the confluence plate 13 and the heat exchange plate 12, 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 respectively connected to the cooling channel 110 and the confluence channel 133 through an inlet joint and an outlet joint, so as to avoid interference between the inlet and outlet channels and make the diversion of the working fluid in the cooling device more uniform.

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, the second connection 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 first through hole 121, and 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 groove and the second groove 131 and the first through hole 121 have an overlapping area. The cooling flow channel 110 and the confluence flow channel 133 are respectively located on the upper and lower sides of the heat exchange plate 12, and are connected to the cooling flow channel 110 and the confluence flow channel 133 through the inlet joint 141 and the outlet joint 142, respectively, to avoid interference between the inlet and outlet flow channels, so that the flow distribution of the working medium in the cooling device is more uniform.

In some specific embodiments, the manifold 13 includes a third connection surface away from the heat exchange plate 12; a avoidance hole is provided in the region of the manifold 13 where no recess is provided, the avoidance hole passes through the third connection surface and the first connection surface, an inlet joint 141 is provided in the avoidance hole and connected to the heat exchange plate 12; an outlet joint 142 is provided in the third connection surface and connected to the manifold 13. By connecting the inlet joint 141 and the outlet joint 142 with the cooling flow channel 110 and the converging flow channel 133 respectively, interference between the inlet and outlet flow channels can be avoided, so that the flow distribution of the working medium in the cooling device is more uniform.

The application of the cooling device described in some embodiments of the present application in the 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 battery cells are square shell cells, which are arranged in 6 rows along the y direction as shown in Figure 1. The battery pack is defined to be 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.

The exploded diagram 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 include 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.

Detailed features of the inlet connector 141 and the outlet connector 142 in the cooling device are shown in FIG3 . 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 a plurality of 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 channel plate 11. As shown in Figure 4. The refrigerant entering the cooling channel 110 passes through the cooling channel 110, exchanges heat with the battery cells in the battery pack, and then enters the first through hole 121 into the converging channel 133 formed by the converging plate 13 and the heat exchange plate 12. The converging plate 13 includes a second groove 131 with a stamping feature, which is π-shaped, and can gather the refrigerant in the converging channel 133 to the outlet connector 142 to reach the outside of the battery pack.

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.

By connecting the inlet joint 141 with the shunt flow channel and the outlet joint 142 with the converging flow channel 133, it is possible to avoid flow channel interference and make the diversion of the working fluid in the cooling device more uniform. Specifically, the working fluid enters the shunt flow channel from the inlet joint 141, and enters the heat exchange flow channel after being diverted from the shunt flow channel, then flows into the collecting flow channel along the heat exchange flow channel, and then flows from the collecting flow channel into the converging flow channel 133, and finally is discharged from the outlet joint 142. By designing the converging plate 13, the battery inlet joint 141 and the outlet joint 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 joint 141, which can divert the refrigerant at a low dryness and improve the flow uniformity.

In some specific embodiments, the heat exchange channel includes at least two sub-channels; the sub-channels are respectively connected to the flow-dividing channel and the flow-collecting channel. Through the multiple sub-channels, there is a C-shaped sub-channel under each column of battery cell group, which can make the temperature between the battery cells in the battery cell group more uniform.

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.

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.

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

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

The cooling channel 110 enters the first sub-channel 1111 of the first sub-channel 1112 of the first sub-channel 1 ... 1113, 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 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, and the third sub-channel 1133 of the first collecting channel, and finally enters the converging channel 133 through the second collecting channel 114 and the first collecting channel 113, and is finally discharged from the outlet joint 142 of the converging channel 133.

Specifically, as shown in FIG5 , the refrigerant flows from the inlet joint 141 to 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; 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 is finally discharged from the outlet joint 142 of the confluent channel 133.

The same applies to the symmetrical flow channel of the second diversion flow channel 112. Each sub-flow 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-flow channel 1141 of the second collecting flow channel, the second sub-flow channel 1142 of the second collecting flow channel, and the third sub-flow channel 1143 of the second collecting flow channel converge to the second collecting flow channel 114 and the first sub-flow channel 1131 of the first collecting flow channel; the second sub-flow channel 1132 of the first collecting flow channel and the third sub-flow channel 1133 of the first collecting flow channel converge to the first collecting flow channel 113, and then converge to the outlet through the converging flow channel 133.

Thus, the first sub-channel 1111 of the first shunt channel, the second sub-channel 1112 of the first shunt channel, and the third sub-channel 1113 of the first shunt channel correspond to the battery cell group 31, the first sub-channel 1121 of the second shunt channel, the second sub-channel 1122 of the second shunt channel, and the third sub-channel 1123 of the second shunt channel correspond to the battery 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 the battery cell group 33. Taking the cooling condition as an example, in the battery cell group 31, the battery cell bottom channel at the leftmost position in FIG. 5 has a total of 6 sub-channels, of which the working fluid in 3 channels is closest to the shunt channel, corresponding to the lowest working fluid temperature, and the working fluid in 3 channels is farthest from the inlet, corresponding to the highest working fluid temperature. This method can make the average temperature of the refrigerant under each battery cell in the battery cell group 31 close to each other, which is beneficial to the uniform temperature between the battery cells. The same is true for the battery cell groups 32 and 33.

Preferably, the characteristic position of the first shunt flow channel 111 and the second shunt flow channel 112 to each sub-flow channel is close to the inlet joint 141, and no battery cell is arranged above it. In this way, the refrigerant does not undergo heat exchange with the battery cell before shunting, thereby maintaining a low dryness, which is conducive to the uniformity of shunting.

In some specific embodiments, the sub-channel extends along the length direction of the channel plate 11 to the end of the channel plate 11 and then folds back once to connect with the collector channel. The design of the collector plate 13 realizes the uniform flow distribution of the refrigerant, and adopts a C-shaped bending channel design for each column of battery cells to achieve uniform temperature between each row and column of battery cells. This design moves the inlet and outlet connectors 142 out of the battery pack, saving space inside the battery pack and avoiding the complex design and weight cost of the pipeline.

In some specific implementations, the cooling channel 110 is symmetrical about a midline in the width direction of the channel plate 11 .

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.

In some specific embodiments, at least some of the sub-channels have different cross-sectional areas. The cross-sectional areas of the first flow-dividing channel 111, the second flow-dividing channel 112, the first flow-collecting channel 113, and the second flow-collecting channel 114 are non-uniform, which can be achieved by changing the channel width or the stamping depth of the first groove. This is to achieve uniformity of flow in each sub-channel and improve temperature uniformity between battery cells.

In some specific embodiments, the flow channel plate 11 is formed with an extension, and the second connection surface is arranged at the extension; 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. The inlet connector 141 and the outlet connector 142 are both arranged at the extension. This design moves the inlet and outlet connectors 142 out of the battery pack, saving the internal space of the battery pack and avoiding the complex design and weight cost of the pipeline.

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

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.

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.

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.

In some embodiments of the present application, two plates in the confluence plate 13 enclose a confluence channel. Detailed description of some embodiments of the present application is as follows.

The cooling device provided according to some embodiments of the present application is described below in conjunction with Figures 7 to 13.

According to some embodiments of the present application, the cooling device includes a plate body 15 and a joint 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 are connected to 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 joint 14. The joint 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.

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

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 more the number of first through holes 121 and third through holes 122, the lower the requirement for the confluence of the direct cooling channel in the plate body 15, the number of channels for confluence can be designed to be smaller, and the distribution area is correspondingly smaller.

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 in the busbar 13. 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.

That is, when there are multiple first through holes 121, the flow dividing holes 137 of the manifold 13 are arranged to correspond to and communicate with the first through holes 121 one by one, so that the manifold 13 can realize the confluence of multiple first through holes 121. At this time, the first flow channel 143 of the joint 14 is connected with the collecting hole 135 to achieve communication with all the first through holes 121. At this time, the joint 14 only needs to design an opening connecting the first flow channel 143 and the collecting hole 135, and the joint 14 has a simple structure and is easy to install.

Specifically, as shown in FIG. 7 and FIG. 10 , 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.

It should be noted that the number of the third through holes 122 may be multiple, and the conduit 13 then converges all the third through holes 122 so that the second flow channel 144 of the connector 14 can be connected to all the third through holes 122 through only one opening.

In some embodiments, as shown in FIG. 10 , the heat exchange plate 12 and the flow channel plate 11 are fixedly connected to form a cooling flow channel 110 , and the heat exchange plate 12 is provided with a first through hole 121 and a third through hole 122 .

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 the connection 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 the connection 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.

Specifically, the heat exchange plate 12 is a plain plate, and the flow channel plate 11 is formed by stamping or inflation to form a flow channel groove with an upper opening. The heat exchange plate 12 is buckled on the upper side of the flow channel plate 11 to close the upper opening of the flow channel groove, thereby forming a cooling flow channel 110 in the space of the flow channel groove. The outer contour dimensions of the heat exchange plate 12 and the flow channel plate 11 are consistent for easy docking and positioning, and the heat exchange plate 12 and the flow channel plate 11 are connected by brazing.

It should be noted that the connector 14 may be integrally formed, or may 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.

In some embodiments, as shown in FIG. 11 and FIG. 12 , the busbar 13 includes a first plate 136 and a second plate 134 that are opposite 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 enclosed to form a busbar flow channel. The first plate 136 is provided with a flow distribution hole 137 , the second plate 134 is provided with a flow 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 .

That is, the busbar 13 is generally a flat plate-shaped structure. On the basis of ensuring the flow 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.

Specifically, the second plate 134 is buckled on the first plate 136 and connected to the first plate 136 by brazing. In addition, the first plate 136 is in contact with the heat exchange plate 12 of the plate body 15 and connected by brazing, and the second plate 134 is in contact with the joint 14 and connected by brazing. One of the first plate 136 and the second plate 134 is formed into a header groove by stamping or inflation, and the other is a bare plate. When the heat exchange plate 12 is buckled on the top of the flow channel plate 11, the space of the header groove forms a converging flow channel.

In some embodiments, as shown in FIG. 10 , 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 the positioning sleeves 138 are plugged into the corresponding first through holes 121 .

When installing the manifold 13 on the plate body 15, the plurality of 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 is high after the brazing connection is completed.

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 .

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 .

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, and the difficulty of pipeline installation is low, which effectively reduces the installation process requirements of the cooling system.

Specifically, as shown in Figures 7 and 13, the joint 14 also has a first opening connected to the first flow channel 143 and a third opening connected to the second flow channel 144. The first opening is connected to the first through hole 121, and the third opening is connected to the third through hole 122. The axial directions of the first opening and the third opening are consistent, the axial directions of the total liquid outlet hole 1431 and the total liquid inlet hole 1441 are consistent, and the axial direction of the first opening is perpendicular to the axial direction of the total liquid outlet hole 1431.

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.

In some embodiments, the cooling channel 110 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 to the first through hole 121, the diverter channel is connected to at least two direct cooling channels, the cooling converging channel corresponds one-to-one to and is connected to the third through hole 122, and the cooling converging channel is connected to at least two direct cooling channels.

By setting a plurality of direct cooling channels, it is ensured that the plate 15 has a larger area with uniform cooling effect. The diversion channel and the cooling converging channel preliminarily converge the direct cooling channel, so as to form a smaller number or a smaller distribution area of the first through hole 121 and the third through hole 122 on the plate 15, further reducing the external converging plate 13 and the joint 14 and the plate 15. Difficulty of connection.

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, the second flow path 152 extends in a second direction, and the first direction is at an angle to the second direction. The flow splitter channel includes at least one primary flow splitter channel 154, each primary flow splitter channel 154 is connected to a plurality of first flow paths 151, and the cooling converging channel is connected to a plurality of third flow paths 153.

The plurality of first flow paths 151 and the plurality of second flow paths 152 arranged at intervals along the second direction form a DC zone 158, which is the main heat dissipation area. Combined with the characteristics of the direct cooling cooling medium (R434a, tetrafluoroethane), after the cooling medium undergoes heat exchange inside the flow channel through phase change, the cooling medium is in an uncertain state (gaseous or gas-liquid mixed state). If a shunt design is performed, the shunt situation of the cooling medium cannot be determined, resulting in uneven heat dissipation of each battery cell. The cooling medium does not shunt when passing through the DC zone 158, effectively ensuring uniform heat dissipation of each battery cell in the battery cell module.

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 a smaller distribution area of liquid inlets and outlets on the plate body 15.

Specifically, the plate body 15 has a shunt area 159 and a direct current area 158 arranged along a first direction. The primary shunt flow channel 154 is distributed in the shunt area 159, there are multiple direct cooling channels and they are distributed in the direct current area 158, the battery cell module placed on the plate body 15 corresponds to the direct current area 158 on the plate body 15, the first direction is the length direction of the plate body 15, and the second direction is the width direction of the plate body 15. Multiple first flow paths 151 and multiple second flow paths 152 are arranged at equal intervals along the second direction, and all flow paths in the direct current area 158 are arranged in a mirror-symmetrical manner relative to the center line of the plate body 15 along the first direction.

In some embodiments, there are multiple primary diverter channels 154, and the diverter channels further include at least one multi-stage diverter channel, and the multi-stage diverter channels are 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, and the multiple primary diverter channels 154 are symmetrically distributed on both sides of the multi-stage diverter channel in the second direction.

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 a suitable 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 allowing the area of the first plate 136 of the conduit 13 to be designed to be smaller, that is, the volume of the conduit 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.

Specifically, the multi-stage flow diversion channel includes a secondary flow diversion channel 155, and there are at least four primary flow diversion channels 154. Each secondary flow diversion channel 155 corresponds to at least two primary flow diversion channels 154. The multiple secondary flow diversion 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 flow diversion channel may also include a tertiary flow diversion channel or a quaternary flow diversion channel, such as multiple secondary flow diversion channels 155 are connected to the first through hole 121 through a tertiary flow diversion channel, or multiple tertiary flow diversion channels are connected to the first through hole 121 through a quaternary flow diversion channel.

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 corresponding to each other and arranged at intervals along the second direction.

It should be noted that the flow rate of each flow path can be flexibly distributed by designing the cross-sectional size of each first through hole 121 .

In some embodiments, as shown in FIG8 and FIG9, 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, and 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.

In the case where there are a large number of third flow paths 153, a larger number of third flow paths 153 can be connected simultaneously through a primary cooling confluence channel 156, and a larger number of primary cooling confluence channels 156 can be connected simultaneously through a multi-stage cooling confluence channel to form an appropriate number of third through holes 122. At the same time, the design of the multi-stage cooling confluence channel with the highest number of stages being located in the middle of the plate body 15 in the second direction allows multiple third through holes 122 to be gathered in a smaller area, thereby allowing the area of the first plate 136 of the confluence plate 13 to be designed to be 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 primary cooling confluence channels 156 being symmetrically distributed on both sides of the multi-stage cooling confluence channel in the second direction reduces the difficulty of manufacturing the primary cooling confluence channel 156.

Specifically, the primary cooling confluence flow channels 156 all extend along the second direction, the multi-stage cooling confluence flow channels include a secondary cooling confluence flow channel 157 extending along the first direction, and the third through hole 122 is located at the center of the secondary cooling confluence flow channel 157 along its length direction. 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 flow channels may also include a tertiary cooling confluence flow channel or a quaternary cooling confluence flow channel, such as multiple secondary cooling confluence flow channels 157 are connected to the third through hole 122 through a tertiary cooling confluence flow channel, or multiple tertiary cooling confluence flow channels are connected to the third through hole 122 through a quaternary cooling confluence flow channel.

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.

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 bending sections for avoiding the mounting holes 115 .

The cooling device is connected to the battery box of the battery pack through a threaded member passing through the mounting hole 115, so that the cooling device can be easily assembled and disassembled from the battery box, and the connection strength between the cooling device and the battery box is high. The cooling channel 110 is designed with a bent section to avoid the mounting hole 115, ensuring that the design of the mounting hole 115 does not affect the distribution density of other parts of the cooling channel 110, so as to ensure that the cooling device has better cooling efficiency.

8 , the 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 in the length direction of the plate body 15, and the three mounting holes 115 are arranged at intervals along the width direction of the plate body 15.

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

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, the first connecting surface is formed with a recessed portion, the first connecting surface and the heat exchange plate 12 are connected 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 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 busbar 13, the projections of the first groove and the second groove 131 and the through hole 121 have an overlapping area.

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 on the third connecting surface and connected to the busbar 13.

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

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.

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.

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.

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.

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

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 the first through hole 121 and/or the third through hole 122 are at least two; a joint 14, a first channel 143 and a second channel 144 are provided in the joint 14, and the joint 14 has a first channel 143 and a second channel 144 connected to the first channel 143 and the ... The flow channel 143 is connected to the total liquid outlet hole 1431 and the total liquid inlet hole 1441 which is 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 .

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 the heat exchange plate 12 is provided with a first through hole 121 and a third through hole 122.

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 inside the busbar 13. 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.

In some specific embodiments, the confluence plate 13 includes a first plate 136 and a second plate 134 that are opposite 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 enclosed to form a confluence flow channel, the first plate 136 is provided with a diversion hole 137, 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.

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 to the diversion holes 137 one by one. The positioning sleeves 138 are arranged around the corresponding diversion holes 137 and are plugged into the corresponding first through holes 121 .

In some specific implementations, 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 .

In some specific embodiments, the connector 14 further has a first opening connected to the first flow channel 143 and a third opening connected to the second flow channel 144, the first opening is connected to the first through hole 121, and the third opening is connected to the third through hole 122. The axial directions of the first opening and the third opening are consistent, the axial directions of the total liquid outlet hole 1431 and the total liquid inlet hole 1441 are consistent, and the axial direction of the first opening is perpendicular to the axial direction of the total liquid outlet hole 1431.

In some specific embodiments, the cooling channel 110 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 121, the diverter 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.

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 extend in a first direction, the second flow path 152 extends in a second direction, and the first direction is at an angle to the second direction. The flow splitting channel includes at least one primary flow splitting channel 154, each primary flow splitting channel 154 is connected to a plurality of first flow paths 151, and the cooling converging channel is connected to a plurality of third flow paths 153.

In some specific embodiments, there are multiple primary diverter channels 154, and the diverter channels further include at least one multi-stage diverter channel, and the multi-stage diverter channels are 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, and the multiple primary diverter channels 154 are symmetrically distributed on both sides of the multi-stage diverter channel in the second direction.

In some specific embodiments, the cooling conduit includes a primary cooling conduit 156 and a multi-stage cooling conduit. There are at least two primary cooling confluence channels 156, and each primary cooling confluence channel 156 is connected to at least two third flow paths 153. The multi-stage cooling confluence channel is connected to all primary cooling confluence channels 156, and the multi-stage cooling confluence 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 channels 156 are symmetrically distributed on both sides of the multi-stage cooling confluence channel in the second direction.

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 bending sections for avoiding the mounting holes 115 .

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.

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

The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (25)

A cooling device, characterized in that it comprises a flow channel plate, a heat exchange plate and a manifold; 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. The cooling device according to claim 1 is characterized in that the busbar plate comprises a first connecting surface facing the heat exchange plate, the first connecting surface is formed with a recessed portion, and the first connecting surface and the heat exchange plate are connected so that the recessed portion forms the busbar channel. The cooling device according to claim 2, characterized in that the flow channel plate comprises 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 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. The cooling device according to claim 2, characterized in that the busbar comprises a third connecting 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. 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. The cooling device according to claim 5, characterized in that the cooling channel includes a flow distribution channel, a heat exchange channel and a flow collection 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 manifold plates are located on the extending portion. 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 with 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. The cooling device according to claim 7, characterized in that the flow-dividing channel comprises a first flow-dividing channel and a second flow-dividing channel, and the flow-collecting channel comprises 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. 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. The cooling device according to claim 7, characterized in that at least some of the sub-channels have different cross-sectional areas. 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. The cooling device according to claim 11 is 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 first through hole and the third through hole are provided on the heat exchange plate. The cooling device according to claim 11 is characterized in that the busbar is connected between the plate body and the joint, the busbar has a collecting hole and a diverting hole connected to the converging 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. The cooling device according to claim 13 is characterized in that the busbar plate comprises 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 diversion hole is provided on the first plate, the 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. The cooling device according to claim 14 is characterized in that a surface of the first plate facing away from the second plate is provided with a positioning sleeve corresponding to the diversion holes one by one, the positioning sleeve is arranged around the corresponding diversion hole, and the positioning sleeve is plugged into the corresponding first through hole. The cooling device according to claim 13 is 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. The cooling device according to claim 16, characterized in that the joint further has 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. The cooling device according to claim 11 is 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. 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 branch flow channel includes at least one primary branch flow channel, each of the primary branch flow 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. The cooling device according to claim 19, characterized in that there are a plurality of the first-level flow diversion channels, and the flow diversion channels further include at least one multi-level flow diversion channel, and the multi-level flow diversion channel is connected to all the first-level 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. 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. The cooling device according to any one of claims 11 to 21 is characterized in that a plurality of mounting holes are provided on the plate body, 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 mounting holes in the width direction of the plate body, and the cooling channels include bending sections for avoiding the mounting holes. A heat exchanger, characterized by comprising the cooling device according to any one of claims 1 to 22. A battery pack, characterized by comprising the heat exchange device according to claim 23. A vehicle, characterized by comprising the battery pack according to claim 24.