CN219494981U - Heat exchanger and thermal management system - Google Patents

Abstract

The heat exchanger is provided with a heat inlet flow collecting channel, a plurality of heat flow channel layers and a heat outlet flow collecting channel which are communicated in sequence, and is also provided with a cold inlet flow collecting channel, a plurality of cold flow channel layers and a cold outlet flow collecting channel which are communicated in sequence, wherein the heat flow channel layers and the cold flow channel layers are alternately stacked; the cold flow channel layer is close to one end of the cold flow channel and is provided with a plurality of spoilers, adjacent spoilers are arranged at intervals and are surrounded to form spoiled flow channels, one end opening of the spoiled flow channel, which is communicated with the cold flow channel, faces the direction deviating from the starting end of the cold flow channel, and the cold flow channel is communicated with the corresponding cold flow channel layer through each spoiled flow channel. The heat exchanger and the heat management system provided by the application solve the problem of uneven refrigerant distribution in the heat exchanger.

Description

Heat exchanger and thermal management system

Technical Field

The application relates to the technical field of refrigerant heat exchange devices, in particular to a heat exchanger and a heat management system.

Background

When the heat exchanger is applied to a battery thermal management system, heat exchange is generally performed between a refrigerant (also called refrigerant) and a coolant (also called antifreeze), the coolant is cooled by a circuit, and at the same time, the temperature of the coolant is increased, and then the coolant exchanges heat with the refrigerant in the heat exchanger, so that the temperature of the coolant is reduced, and the coolant is cooled in the next process.

Further, in the prior art, after the refrigerant enters the collecting channel of the heat exchanger, the refrigerant is easy to directly enter the cold flow channel layer close to the starting end of the collecting channel, so that less refrigerant enters the cold flow channel layer far from the starting end of the collecting channel, and uneven distribution of the refrigerant in the heat exchanger is caused.

Disclosure of Invention

Based on this, it is necessary to provide a heat exchanger and a thermal management system to solve the problem of uneven distribution of refrigerant in the heat exchanger.

The heat exchanger is provided with a heat inlet flow collecting channel, a plurality of heat flow channel layers and a heat outlet flow collecting channel which are communicated in sequence, and is also provided with a cold inlet flow collecting channel, a plurality of cold flow channel layers and a cold outlet flow collecting channel which are communicated in sequence, wherein the heat flow channel layers and the cold flow channel layers are alternately stacked; the cold flow channel layer is close to one end of the cold flow channel and is provided with a plurality of spoilers, adjacent spoilers are arranged at intervals and are surrounded to form spoiled flow channels, one end opening of the spoiled flow channel, which is communicated with the cold flow channel, faces the direction deviating from the starting end of the cold flow channel, and the cold flow channel is communicated with the corresponding cold flow channel layer through each spoiled flow channel.

In one embodiment, the cross-sectional area of the opening of the choke passage communicated with one end of the cold collecting passage decreases from the direction approaching the beginning of the cold collecting passage to the direction separating from the beginning of the cold collecting passage.

In one embodiment, the choke flow channel is in a contracted shape along the direction from the direction close to the beginning of the cold-inlet collecting channel to the direction far from the beginning of the cold-inlet collecting channel.

In one embodiment, a plurality of spoilers are respectively surrounded to form a plurality of spoilers, and adjacent spoilers are communicated end to end and form a serpentine channel structure.

In one embodiment, the choke passage extends axially along the intake and cold header passage.

In one embodiment, the heat exchanger comprises a first partition plate and a second partition plate which are arranged in a stacked manner, wherein the first partition plate and the second partition plate are arranged in a surrounding manner to form a cold flow channel layer, the first partition plate is positioned on one side of the cold flow channel layer, which is far away from the starting end of the cold inlet and collecting channel, and the second partition plate is positioned on one side of the cold flow channel layer, which is close to the starting end of the cold inlet and collecting channel; the spoiler comprises a first baffle plate and a second baffle plate, wherein a flow blocking channel is formed by surrounding the first baffle plate and the second baffle plate, one end of the first baffle plate is connected with the first partition plate, the other end of the first baffle plate extends towards the direction close to the starting end of the cold-inlet flow collecting channel, one end of the second baffle plate is connected with the second partition plate, the other end of the second baffle plate extends towards the direction far away from the starting end of the cold-inlet flow collecting channel, and the first baffle plate is arranged on one side of the second baffle plate, which is far away from the central shaft of the cold-inlet flow collecting channel.

In one embodiment, the first baffle and the second baffle are both annular.

In one embodiment, the first baffle and the first divider are integrally formed, and the second baffle and the second divider are integrally formed.

In one embodiment, the edge portion of the first partition plate near the cold collecting channel extends towards the direction near the starting end of the cold collecting channel to form a first baffle.

In one embodiment, the edge portion of the second partition plate, which is close to the cold collecting channel, extends towards the direction away from the starting end of the cold collecting channel to form a second baffle plate.

The present application also provides a thermal management system comprising the heat exchanger of any one of the above embodiments.

Compared with the prior art, the heat exchanger and the thermal management system provided by the application generally have the advantages that the refrigerant flows in the cold inlet and collector channel along the axial direction of the cold inlet and collector channel towards the direction far away from the starting end of the cold inlet and collector channel. By arranging the flow blocking channel, the opening of one end of the flow blocking channel communicated with the cold inflow and collecting channel faces away from the starting end of the cold inflow and collecting channel, namely, the opening of one end of the flow blocking channel communicated with the cold inflow and collecting channel faces the same direction as the flowing direction of the refrigerant in the cold inflow and collecting channel. And because the refrigerant can only enter the flow blocking channel when flowing towards the opening of the flow blocking channel, the flowing direction of the refrigerant entering the opening of the flow blocking channel is opposite to the flowing direction of the refrigerant in the cold and current collecting channel. Therefore, the refrigerant in the cold-inlet collecting channel cannot directly impact the flow-blocking channel in the process of axially advancing along the cold-inlet collecting channel, namely, the refrigerant in the cold-inlet collecting channel can enter the flow-blocking channel after the flow direction of the refrigerant is changed. Therefore, the refrigerant can enter the flow blocking channel and finally enter the corresponding cold flow channel layer only when reaching the position of the cold inlet and flow collecting channel farthest from the starting end and flowing back to the starting end, so that the refrigerant can enter the cold flow channel layer farther from the starting end of the cold inlet and flow collecting channel first and then enter the cold flow channel layer nearer to the starting end of the cold inlet and flow collecting channel. In addition, the speed of the refrigerant flowing back in the cold-inlet and current-collecting channel is far less than the normal flow speed of the refrigerant in the cold-inlet and current-collecting channel, so that the refrigerant is difficult to completely enter the cold-flow channel layer far from the starting end of the cold-inlet and current-collecting channel at one time, and the refrigerant can be uniformly distributed in a plurality of cold-flow channel layers. Therefore, the arrangement effectively solves the problem that the refrigerant in the cold flow channel layer far away from the starting end of the collecting channel is less, and the refrigerant in the heat exchanger is unevenly distributed.

Drawings

In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings that are required to be used in the description of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic view of a heat exchanger according to an embodiment of the present disclosure;

FIG. 2 is a top view of a heat exchanger according to an embodiment provided herein;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

fig. 4 is an enlarged view at a shown in fig. 3.

Reference numerals: 100. a heat flow channel layer; 210. a cold inlet and collecting channel; 220. a cold flow channel layer; 230. a cold-discharging and current-collecting channel; 300. a spoiler; 310. a choke passage; 320. a first baffle; 330. a second baffle; 410. a first partition plate; 420. a second partition plate; 510. a refrigerant liquid inlet pipe; 520. a refrigerant liquid outlet pipe; 610. a cooling liquid inlet pipe; 620. a cooling liquid outlet pipe; 700. and a heat exchange core.

Detailed Description

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

When the heat exchanger is applied to a battery thermal management system, heat exchange is generally performed between a refrigerant (also called refrigerant) and a coolant (also called antifreeze), the coolant is cooled by a circuit, and at the same time, the temperature of the coolant is increased, and then the coolant exchanges heat with the refrigerant in the heat exchanger, so that the temperature of the coolant is reduced, and the coolant is cooled in the next process.

Further, in the prior art, after the refrigerant enters the collecting channel of the heat exchanger, the refrigerant is easy to directly enter the cold flow channel layer close to the starting end of the collecting channel, so that less refrigerant enters the cold flow channel layer far from the starting end of the collecting channel, and uneven distribution of the refrigerant in the heat exchanger is caused.

Referring to fig. 1-4, in order to solve the problem of uneven distribution of the refrigerant in the heat exchanger, the present application provides a heat exchanger, which includes a refrigerant liquid inlet pipe 510, a refrigerant liquid outlet pipe 520, a cooling liquid inlet pipe 610, a cooling liquid outlet pipe 620 and a heat exchange core 700, wherein the refrigerant enters the heat exchange core 700 from the refrigerant liquid inlet pipe 510 and leaves the heat exchange core 700 from the refrigerant liquid outlet pipe 520, the cooling liquid enters the heat exchange core 700 from the cooling liquid inlet pipe 610 and leaves the heat exchange core 700 from the cooling liquid outlet pipe 620, and the refrigerant and the cooling liquid exchange heat in the heat exchange core 700. The heat exchanger is provided with a heat inlet and collecting channel (not shown), a plurality of heat flow channel layers 100 and a heat outlet and collecting channel (not shown) which are communicated in sequence, and is also provided with a cold inlet and collecting channel 210, a plurality of cold flow channel layers 220 and a cold outlet and collecting channel 230 which are communicated in sequence, wherein the heat flow channel layers 100 and the cold flow channel layers 220 are alternately stacked. In addition, the refrigerant liquid inlet pipe 510 is communicated with the cold current collecting channel 210, the refrigerant liquid outlet pipe 520 is communicated with the cold current collecting channel 230, the cooling liquid inlet pipe 610 is communicated with the hot current collecting channel, the cooling liquid outlet pipe 620 is communicated with the hot current collecting channel, and the cold current channel layer 220 and the hot current channel layer 100 are both arranged in the heat exchange core 700. The cold flow channel layer 220 is provided with a plurality of spoilers 300 at one end close to the cold flow collecting channel 210, adjacent spoilers 300 are arranged at intervals and are surrounded to form flow blocking channels 310, one end opening of the flow blocking channels 310 communicated with the cold flow collecting channel 210 faces to the direction deviating from the starting end of the cold flow collecting channel 210, and the cold flow collecting channel 210 is communicated with the corresponding cold flow channel layer 220 through each flow blocking channel 310.

In general, the refrigerant flows in the cold header passage 210 in a direction away from the start end of the cold header passage 210 along the axial direction of the cold header passage 210. By providing the flow blocking passage 310, the opening of the end of the flow blocking passage 310, which communicates with the cold header passage 210, faces away from the start end of the cold header passage 210, i.e., the opening of the end of the flow blocking passage 310, which communicates with the cold header passage 210, faces the same direction as the flow direction of the refrigerant in the cold header passage 210. Because the refrigerant can only flow into the choke flow channel 310 towards the opening of the choke flow channel 310, the flow direction of the refrigerant entering the opening of the choke flow channel 310 is opposite to the flow direction of the refrigerant in the cold and current collecting channel 210. Thus, the refrigerant in the cold-collecting channel 210 cannot directly impact the flow-blocking channel 310 during the axial travel along the cold-collecting channel 210, i.e. the refrigerant in the cold-collecting channel 210 needs to change the flow direction before entering the flow-blocking channel 310. Thus, the refrigerant can only enter the choke flow channel 310 and finally enter the corresponding cold flow channel layer 220 when reaching the position of the cold inflow and collecting channel 210 farthest from the starting end and flowing back to the starting end, so that the refrigerant can enter the cold flow channel layer 220 farther from the starting end of the cold inflow and collecting channel 210 first and then enter the cold flow channel layer 220 nearer to the starting end of the cold inflow and collecting channel 210. In addition, the speed of the refrigerant flowing back in the cold-inflow and-collecting channel 210 is far less than the normal speed of the refrigerant flowing in the cold-inflow and-collecting channel 210, so that the refrigerant is difficult to completely enter the cold-flow channel layer 220 far from the starting end of the cold-inflow and-collecting channel 210 at one time, and the refrigerant can be uniformly distributed in the cold-flow channel layers 220. As can be seen from the above, the arrangement effectively solves the problem that the refrigerant in the cold flow channel layer 220 far from the start end of the collecting channel is less, and thus the refrigerant in the heat exchanger is unevenly distributed.

It should be noted that, the start end of the cold-intake collecting channel 210 refers to the inlet end of the cold-intake collecting channel 210 into which the refrigerant flows.

In one embodiment, as shown in FIG. 4, the choke passage 310 extends axially along the intake manifold passage 210.

By the arrangement, the refrigerant can quickly enter the cold flow channel layer 220 through the flow blocking channel 310 after entering the flow blocking channel 310, and the speed of the refrigerant in the heat exchanger is effectively improved.

However, in other embodiments, the choke passage 310 may be curved or stepped.

Specifically, in one embodiment, as shown in fig. 4, the heat exchanger includes a first partition plate 410 and a second partition plate 420 that are stacked, where the first partition plate 410 and the second partition plate 420 are enclosed to form a cold flow channel layer 220, and the first partition plate 410 is located on a side of the cold flow channel layer 220 away from a start end of the cold flow collecting channel 210, and the second partition plate 420 is located on a side of the cold flow channel layer 220 near the start end of the cold flow collecting channel 210. The flow blocking plate 300 comprises a first baffle 320 and a second baffle 330, the first baffle 320 and the second baffle 330 are surrounded to form a flow blocking channel 310, one end of the first baffle 320 is connected with a first separation plate 410, the other end extends towards the direction close to the starting end of the cold-collecting channel 210, one end of the second baffle 330 is connected with a second separation plate 420, the other end extends towards the direction far away from the starting end of the cold-collecting channel 210, and the first baffle 320 is arranged on one side of the second baffle 330 away from the central shaft of the cold-collecting channel 210.

By the arrangement, the difficulty in arranging the flow blocking plate 300 in the heat exchanger is greatly reduced.

Specifically, in one embodiment, the first baffle 320 is disposed at a distance from the second partition plate 420 toward an end extending in a direction toward the start of the cold collecting channel 210, and the second baffle 330 is disposed at a distance from the first partition plate 410 toward an end extending in a direction away from the start of the cold collecting channel 210.

In one embodiment, the first baffle 320 and the second baffle 330 are each annular.

Thus, the processing difficulty of the first baffle 320 and the second baffle 330 is reduced.

But is not limited thereto, in other embodiments, the first and second baffles 320 and 330 may also be annular in other shapes.

Further, in an embodiment, the first baffle 320 and the first partition plate 410 are integrally formed.

In this way, the coupling strength of the first barrier 320 and the first partition plate 410 is greatly improved.

Specifically, in one embodiment, as shown in fig. 4, an edge portion of the first partition plate 410 near the cold collecting channel 210 extends toward a direction near the start of the cold collecting channel 210 to form the first baffle 320.

In this way, the difficulty of processing the first baffle 320 is greatly reduced.

More specifically, in an embodiment, the first partition plate 410 and the first baffle 320 may be machined by press forming. However, the present utility model is not limited thereto, and in other embodiments, the first partition plate 410 and the first baffle plate 320 may be processed by casting molding, or the first baffle plate 320 and the first partition plate 410 may be processed by 3D printing molding.

Further, in an embodiment, the second baffle 330 and the second partition 420 are integrally formed.

In this way, the coupling strength of the second barrier 330 and the second partition 420 is greatly improved.

Specifically, in one embodiment, as shown in fig. 4, the edge portion of the second partition plate 420 near the cold collecting channel 210 extends toward a direction away from the start end of the cold collecting channel 210 to form the second baffle 330.

In this way, the difficulty of processing the second baffle 330 is greatly reduced.

More specifically, in an embodiment, the second partition 420 and the second baffle 330 may be machined by stamping. However, the present utility model is not limited thereto, and in other embodiments, the second partition 420 and the second barrier 330 may be formed by casting molding, or the second barrier 330 and the second partition 420 may be formed by 3D printing molding.

As can be seen from the above, after the flow blocking channel 310 is provided, the refrigerant can first enter the cold flow channel layer 220 far from the start end of the cold flow collecting channel 210, and then enter the cold flow channel layer 220 near to the start end of the cold flow collecting channel 210. Even though the distribution of the refrigerant in the plurality of cold flow channel layers 220 is relatively more uniform, the amount of refrigerant entering the cold flow channel layer 220 farther from the beginning of the cold flow collecting channel 210 is still greater than the amount of refrigerant entering the cold flow channel layer 220 nearer to the beginning of the cold flow collecting channel 210.

To achieve a more uniform distribution of the refrigerant in the cold flow channel layer 220, in one embodiment, the cross-sectional area of the opening of the choke flow channel 310 at one end of the cold flow collecting channel 210 decreases from the direction near the start of the cold flow collecting channel 210 to the direction far from the start of the cold flow collecting channel 210.

By the arrangement, the quantity of the refrigerant entering the cold flow channel layer 220 far from the starting end of the cold flow collecting channel 210 and the quantity of the refrigerant entering the cold flow channel layer 220 near to the starting end of the cold flow collecting channel 210 are effectively balanced, and the refrigerant in the whole heat exchanger is more uniformly distributed.

In one embodiment, the choke flow channel 310 is convergent in a direction from a direction toward the beginning of the cold-collecting channel 210 to a direction away from the beginning of the cold-collecting channel 210.

In this way, the flow area of the refrigerant after entering the flow blocking channel 310 is enlarged, so that the flow velocity of the refrigerant after entering the flow blocking channel 310 is reduced, and the whistle generated when the refrigerant flows in the flow blocking channel 310 is reduced.

In one embodiment, the plurality of spoilers 300 are respectively surrounded to form a plurality of spoilers 310, and adjacent spoilers 310 are connected end to end and form a serpentine channel structure.

By the arrangement, the speed of the refrigerant entering the flow blocking channels 310 is effectively slowed down, and the refrigerant is uniformly distributed among the flow blocking channels 310.

The present application also provides a thermal management system comprising a heat exchanger as described in any one of the embodiments above.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of the present application is to be determined by the following claims.

Claims (10)

1. The heat exchanger is characterized by comprising a heat inlet flow collecting channel, a plurality of heat flow channel layers (100) and a heat outlet flow collecting channel which are sequentially communicated, wherein the heat exchanger is further provided with a cold inlet flow collecting channel (210), a plurality of cold flow channel layers (220) and a cold outlet flow collecting channel (230) which are sequentially communicated, and the heat flow channel layers (100) and the cold flow channel layers (220) are alternately stacked; the cold flow channel layer (220) is close to one end of the cold inlet and flow collecting channel (210) and is provided with a plurality of flow blocking plates (300), the adjacent flow blocking plates (300) are arranged at intervals and are surrounded to form a flow blocking channel (310), the flow blocking channel (310) is communicated with one end opening of the cold inlet and flow collecting channel (210) faces the direction deviating from the starting end of the cold inlet and flow collecting channel (210), and the cold inlet and flow collecting channel (210) is communicated with the corresponding cold flow channel layer (220) through each flow blocking channel (310).

2. The heat exchanger according to claim 1, wherein the cross-sectional area of the opening of the choke passage (310) communicating with the one end of the cold header passage (210) decreases in a direction from a direction approaching the beginning of the cold header passage (210) to a direction separating from the beginning of the cold header passage (210).

3. The heat exchanger according to claim 1, wherein the flow blocking channel (310) is convergent in a direction from a direction approaching the start of the cold header channel (210) to a direction separating from the start of the cold header channel (210).

4. The heat exchanger according to claim 1, wherein a plurality of the spoilers (300) are respectively surrounded to form a plurality of the spoilers (310), and adjacent spoilers (310) are connected end to end and form a serpentine channel structure.

5. The heat exchanger according to claim 1, wherein the flow blocking passage (310) extends axially along the cold inlet header passage (210).

6. The heat exchanger according to claim 1, comprising a first separator plate (410) and a second separator plate (420) which are stacked, wherein the first separator plate (410) and the second separator plate (420) are surrounded to form the cold flow channel layer (220), the first separator plate (410) is positioned at a side of the cold flow channel layer (220) away from the start end of the cold inlet and collector channel (210), and the second separator plate (420) is positioned at a side of the cold flow channel layer (220) close to the start end of the cold inlet and collector channel (210); the air blocking plate (300) comprises a first baffle plate (320) and a second baffle plate (330), the first baffle plate (320) and the second baffle plate (330) are surrounded to form the air blocking channel (310), one end of the first baffle plate (320) is connected with the first separation plate (410), the other end of the first baffle plate extends towards the direction close to the starting end of the air inlet and cooling collecting channel (210), one end of the second baffle plate (330) is connected with the second separation plate (420), the other end of the second baffle plate extends towards the direction away from the starting end of the air inlet and cooling collecting channel (210), and the first baffle plate (320) is arranged on one side, deviating from the central shaft of the air inlet and cooling collecting channel (210), of the second baffle plate (330).

7. The heat exchanger of claim 6, wherein the first baffle (320) and the second baffle (330) are each annular.

8. The heat exchanger according to claim 6, wherein the first baffle (320) and the first partition plate (410) are of an integrally formed structure;

the second baffle (330) and the second partition plate (420) are of an integrally formed structure.

9. The heat exchanger according to claim 8, wherein an edge portion of the first partition plate (410) adjacent to the cold header channel (210) extends toward a direction adjacent to a start end of the cold header channel (210) to form the first baffle (320);

and/or, the edge part of the second partition plate (420) close to the cold inlet and collecting channel (210) extends towards the direction away from the starting end of the cold inlet and collecting channel (210) to form the second baffle plate (330).

10. A thermal management system comprising the heat exchanger of any one of claims 1-9.