CN220731630U - Heat exchange plate and battery pack comprising same - Google Patents

Abstract

The utility model provides a heat exchange plate and a battery pack comprising the same. The heat exchange plate includes: the liquid inlet and the liquid outlet are arranged at the same end of the heat exchange plate, and the heat exchange medium flows from the liquid inlet to the liquid outlet; the heat exchange plate comprises a plurality of heat exchange areas which are sequentially arranged and are in fluid communication along the flow direction of the heat exchange medium, and each heat exchange area comprises a plurality of flow channels which are arranged in parallel; wherein, along the flow direction, the total sectional area of the flow channels in different heat exchange areas is reduced in turn. The heat exchange plate can uniformly exchange heat in each area of the battery pack, and effectively reduce the temperature difference between different areas of the battery pack so as to ensure the battery performance.

Description

Heat exchange plate and battery pack comprising same

Technical Field

The utility model belongs to the technical field of battery thermal management, and particularly provides a heat exchange plate and a battery pack comprising the heat exchange plate.

Background

At present, new energy industry is rising, but pure electric vehicles are more vigorous, and one of key parts of the pure electric vehicles is a battery. The battery emits a large amount of heat along with long-time operation, and the heat of the battery can have a certain negative effect on the whole vehicle performance, and the abnormal change of the temperature of the battery can reduce the performance of the battery. For example, a high temperature for a long period of time may cause thermal runaway, thereby causing an accident. In order to ensure that the battery works in a reasonable temperature range, heat exchange and temperature rise or temperature reduction are generally required by a heat exchange device, and the commonly used heat exchange device is a heat exchange plate.

The existing heat exchange plate comprises a plurality of heat exchange areas connected in series so as to exchange heat with the electric cores at different positions, when a heat exchange medium flows through the rear heat exchange area, the heat exchange medium is subjected to heat exchange in the front heat exchange area, so that the heat exchange efficiency of the rear heat exchange area is reduced, the heat dissipation capacity of the different heat exchange areas is easily caused to be different, and the temperature difference of the electric cores at different areas in the battery pack is increased.

Therefore, there is a need in the art for a new solution to the above technical problems.

Disclosure of Invention

The utility model aims to solve the technical problems, namely the problem that the large temperature difference exists between the electric cores in different areas in the battery pack when the traditional heat exchange plate exchanges heat with the battery pack.

In a first aspect, the present utility model provides a heat exchanger plate comprising: the liquid inlet and the liquid outlet are arranged at the same end of the heat exchange plate, and the heat exchange medium flows from the liquid inlet to the liquid outlet; the heat exchange plate comprises a plurality of heat exchange areas which are sequentially arranged and are in fluid communication along the flow direction of the heat exchange medium, and each heat exchange area comprises a plurality of flow channels which are arranged in parallel; wherein, along the flow direction, the total sectional area of the flow channels in different heat exchange areas is reduced in sequence.

In the above-mentioned alternative solution of the heat exchange plate, the number of the flow channels in different heat exchange areas decreases in sequence along the flow direction.

In the above-mentioned alternative technical solutions of the heat exchange plate, the lengths of the heat exchange areas in the first direction are equal; and/or, the sectional area of each flow passage is equal, and the number of the flow passages in different heat exchange areas is sequentially decreased by one along the flow direction.

In the above-mentioned alternative technical solution of the heat exchange plate, in each of the heat exchange areas, two adjacent flow channels are communicated.

In an alternative technical scheme of the heat exchange plate, the heat exchange plate comprises a first plate body and a second plate body which are stacked, the first plate body comprises a connecting part and a protruding part, the connecting part is connected with the second plate body, and the flow channel is formed between the protruding part and the second plate body.

In an alternative technical scheme of the heat exchange plate, the protruding part is formed through a stamping process; and/or the connecting part is welded with the second plate body.

In an optional technical scheme of the heat exchange plate, the connecting part comprises a first connecting part and a plurality of second connecting parts, the first connecting part is in a ladder shape, the first connecting part divides the heat exchange plate into a first area and a second area, and the first area and the second area both comprise a plurality of heat exchange areas; the second connecting part is positioned in the heat exchange area and divides the heat exchange area into a plurality of parallel runners.

In an optional technical scheme of the heat exchange plate, the first connecting part comprises an extension section and a connecting section which are sequentially connected, the extension section is provided with a plurality of extension sections and extends along a first direction, and the connecting section is connected with the adjacent extension sections; in the second direction, the plurality of extension sections are arranged in a staggered manner, so that the number of the flow channels in different heat exchange areas is sequentially decreased along the flowing direction, wherein the second direction is perpendicular to the first direction.

In the above-mentioned alternative technical solution of the heat exchange plate, the number of the first areas is two, the two first areas are symmetrically arranged, and the liquid inlet ends of the two first areas are all communicated with the liquid inlet; the number of the second areas is two, the two second areas are symmetrically arranged, and the liquid outlet ends of the two second areas are communicated with the liquid outlet.

In the optional technical scheme of the heat exchange plate, the width of the first connecting part is 2 mm-8 mm; and/or the width of each second connecting part is equal, and the width of each second connecting part is 2-8 mm; and/or the sectional area of each flow channel is equal, and the sectional area of the flow channel is 20mm ² ～120mm ² 。

In a second aspect, the utility model provides a battery pack comprising a battery and the heat exchange plate, wherein the heat exchange plate exchanges heat with the battery.

Under the condition that the technical scheme is adopted, the heat exchange plate comprises the liquid inlet, the liquid outlet and a plurality of heat exchange areas which are sequentially communicated, wherein the liquid inlet and the liquid outlet are arranged at the same end of the heat exchange plate, the liquid inlet and the liquid outlet are communicated by the plurality of heat exchange areas, each heat exchange area comprises a plurality of flow channels which are arranged in parallel, and the total sectional area of the flow channels in different heat exchange areas is sequentially reduced along the flow direction of a heat exchange medium. By the arrangement mode, the total sectional area of the flow channel is gradually reduced along the flow direction of the heat exchange medium, so that the flow speed of the heat exchange medium in the flow channel can be gradually increased, the heat exchange capacity is improved, and the temperature difference between the electric cores in different areas of the battery pack is reduced, and the overall performance of the battery pack is ensured; in addition, the liquid inlet and the liquid outlet are arranged on the same side of the heat exchange plate, so that the liquid inlet and outlet pipelines of the heat exchange medium are conveniently arranged, the space occupied by the liquid inlet and outlet pipelines is reduced, and the energy density of the battery pack is improved.

In addition, the battery pack has the beneficial effects that the heat exchange plate is included, so that when the battery pack is used, the temperature difference of each area of the battery pack is small, the performance of the battery pack is guaranteed, and the service life of the battery pack is prolonged.

Drawings

Alternative embodiments of the utility model are described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic flow diagram of a heat exchange medium of a first embodiment of a heat exchange plate according to the utility model.

Fig. 2 is an exploded view of a first embodiment of the heat exchange plate of the present utility model.

Fig. 3 is a top view of an embodiment of a heat exchanger plate according to the present utility model.

Fig. 4 is a cross-sectional view taken along the direction A-A in fig. 3.

Fig. 5 is an enlarged schematic view of the structure at a in fig. 4.

Fig. 6 is a schematic perspective view of a second plate body according to a first embodiment of the heat exchange plate of the present utility model.

Fig. 7 is an enlarged schematic view of the structure at B in fig. 6.

Fig. 8 is an enlarged schematic view of the structure at C in fig. 7.

Fig. 9 is a schematic flow diagram of a heat exchange medium of a second embodiment of a heat exchange plate according to the utility model.

Fig. 10 is a schematic view of a heat exchange medium flow of a third embodiment of a heat exchange plate of the present utility model.

List of reference numerals：

1. A first plate body; 11. a connection part; 111. a first connection portion; 1111. an extension section; 1112. a connection section; 112. a second connecting portion; 12. a protruding portion;

2. a second plate body;

3. a flow passage; 4. a connecting runner;

5. a liquid inlet; 6. a liquid outlet;

7. a first region; 8. a second region; 9. and a heat exchange area.

Detailed Description

Alternative embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "inner", "outer", and the like refer to directions or positional relationships based on directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "configured" and "arranged" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through other members. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Referring to fig. 1 to 10, the heat exchange plate of the present utility model includes a liquid inlet 5, a liquid outlet 6, and a plurality of heat exchange areas 9.

The liquid inlet 5 and the liquid outlet 6 are arranged at the same end of the heat exchange plate. The liquid inlet 5 and the liquid outlet 6 are arranged at the same end of the heat exchange plate, so that the occupied area and the occupied volume of the liquid inlet 5 and the liquid outlet 6 can be reduced, the area and the occupied volume of the heat exchange plate are reduced, pipelines for heat exchange media are conveniently arranged, the complexity of the pipeline arrangement is reduced, the occupied space of the pipelines can be reduced, and the energy density of a battery pack is improved.

The plurality of heat exchange areas 9 are sequentially arranged and are in fluid communication, the liquid inlet 5 is communicated with the liquid outlet 6 through the plurality of communicated heat exchange areas 9, and a heat exchange medium flows from the liquid inlet 5 towards the liquid outlet 6 and sequentially flows through the plurality of heat exchange areas 9 in the flowing process, so that the plurality of heat exchange areas 9 can exchange heat with the electric core of the battery pack.

Each heat exchange zone 9 comprises a plurality of flow channels 3 arranged in parallel, wherein the total cross-sectional area of the flow channels 3 in the different heat exchange zones 9 decreases in sequence in the flow direction of the heat exchange medium (as indicated by the arrow in fig. 1, 9, 10). The plurality of flow channels 3 in the heat exchange region 9 are in communication with the plurality of flow channels 3 in the adjacent heat exchange region 9, so that the adjacent two heat exchange regions 9 are in fluid communication. Each heat exchange area 9 comprises a plurality of flow channels 3, namely, each heat exchange area 9 at least comprises two flow channels 3, when one flow channel 3 is blocked, heat exchange medium can continue to circulate and exchange heat through the other flow channel 3, so that the work of the whole heat exchange plate is prevented from being influenced due to unexpected situations, and the safety is higher.

According to the heat exchange plate disclosed by the utility model, the total sectional areas of the flow channels 3 in different heat exchange areas 9 are sequentially reduced along the flow direction of a heat exchange medium, and the flow velocity of the heat exchange medium can be improved along with the reduction of the total sectional area of the flow channels 3, so that the surface convection heat exchange coefficient of the heat exchange plate is increased, and the heat exchange capacity is further improved, so that the problem that the heat exchange capacity of the heat exchange medium of the heat exchange area 9 at the rear section is reduced, and therefore, each heat exchange area 9 has basically the same heat exchange capacity, the temperature difference between electric cores in different areas in a battery pack is reduced, and particularly the temperature difference between the electric cores corresponding to the heat exchange area 9 close to the liquid inlet 5 and the heat exchange area 9 close to the liquid outlet 6 is reduced, so that the heat exchange plate can uniformly exchange heat (cool or heat) to the electric cores, and the performance of the battery pack is improved while the heat exchange effect is improved.

When the heat exchange plate is used for exchanging heat with the electric core in the battery pack, the temperature of the electric core is uniform, the heat exchange effect is good, larger temperature difference of the electric core in different areas in the battery pack can be avoided, the battery pack can maintain good performance, and the heat exchange plate is more convenient to apply.

Alternatively, with continued reference to fig. 1 to 10, the number of flow channels 3 in different heat exchange areas 9 decreases in sequence in the flow direction of the heat exchange medium.

The number of the flow channels 3 in different heat exchange areas 9 is sequentially decreased along the flow direction of the heat exchange medium, so that the total sectional area of the flow channels 3 is reduced, the number and the positions of the heat exchange areas 9 and the flow channels 3 are conveniently distributed, and the heat exchange plate is conveniently manufactured.

Alternatively, the lengths of the respective heat exchange areas 9 in the first direction are equal. The heat exchange areas 9 are arranged in equal length, so that the positions of the heat exchange areas 9 are conveniently positioned, and the positions of the flow channels 3 in different heat exchange areas 9 are conveniently distributed, so that the heat exchange plates are conveniently produced and manufactured. Illustratively, the first direction is a length direction of the heat exchange plate.

Alternatively, the sectional area of each flow channel 3 is equal; the number of flow channels 3 in different heat exchange areas 9 decreases one after the other in the flow direction of the heat exchange medium. Therefore, through the design and the combination of the equal lengths of the heat exchange areas 9 in the first direction, the uniform reduced flow passage sectional area is formed, the flow velocity of the heat exchange medium is also relatively uniformly improved, and the heat exchange capability of the heat exchange areas 9 is further ensured to be basically consistent; meanwhile, the distribution of the distribution flow channels 3 is convenient, and the production and the manufacture are convenient.

Optionally, in each heat exchange region 9, two adjacent flow channels 3 communicate. Illustratively, two adjacent flow channels 3 communicate through a connecting flow channel 4. Therefore, after one flow channel 3 is blocked, heat exchange medium can enter the adjacent flow channels of the flow channel through the connecting flow channel 4 to flow, heat exchange is continuously carried out on the battery pack, the whole heat exchange capacity of the heat exchange plate can be ensured, meanwhile, each flow channel 3 can enter and exit the heat exchange medium in multiple directions, the flow effect of the heat exchange medium can be improved, the flowing heat exchange medium is fully filled in the flow channel 3, and the heat exchange performance of the heat exchange plate is ensured.

The heat exchanger plate of the present utility model will be described in detail by means of a specific example.

Referring to fig. 1 to 8, the heat exchange plate of the present embodiment includes a liquid inlet 5, a liquid outlet 6, a plurality of heat exchange areas 9, and a first plate body 1 and a second plate body 2 stacked together.

The liquid inlet 5 and the liquid outlet 6 are both arranged on the second plate body 2 and are positioned at the same end of the second plate body 2, the plurality of heat exchange areas 9 are sequentially arranged and are in fluid communication, the liquid inlet 5 and the liquid outlet 6 are communicated by the plurality of communicated heat exchange areas 9, a heat exchange medium flows from the liquid inlet 5 towards the liquid outlet 6 and sequentially flows through the plurality of heat exchange areas 9 in the flowing process, so that heat exchange can be performed on the electric cores corresponding to the plurality of heat exchange areas 9.

Each heat exchange area 9 comprises a plurality of flow channels 3 which are arranged in parallel, and the flow channels 3 in two adjacent heat exchange areas 9 are communicated, wherein the total sectional areas of the flow channels 3 in different heat exchange areas 9 are sequentially reduced along the flow direction of the heat exchange medium.

Referring to fig. 4 to 6, the first plate 1 includes a connecting portion 11 and a protruding portion 12, the connecting portion 11 is connected to the second plate 2, and a flow channel 3 is formed between the protruding portion 12 and the second plate 2. The connection portion 11 is connected to the second plate body 2, so that the first plate body 1 and the second plate body 2 can be stably connected, and the flow passage 3 is formed between the protruding portion 12 and the second plate body 2.

In an alternative implementation of this embodiment, referring to fig. 7 and 8, in each heat exchange area 9, two adjacent flow channels 3 are communicated through a connecting flow channel 4. Through setting up connecting runner 4 with two adjacent runners 3 intercommunication, after a runner 3 is stopped up, heat transfer medium also can enter into the runner 3 adjacent runner through connecting runner 4 and flow, continues to exchange heat to the battery package, can guarantee the wholeness ability of heat exchange plate, and every runner 3 all can the multi-azimuth business turn over heat transfer medium simultaneously, can improve the flow effect of heat transfer medium, guarantees that runner 3 is filled with the heat transfer medium of flow to guarantee the performance of heat exchange plate.

Illustratively, two adjacent flow channels 3 communicate through one connecting flow channel 4.

Illustratively, two adjacent flow channels 3 are communicated by a plurality of connecting flow channels 4, the plurality of connecting flow channels 4 being spaced apart along the length of the flow channels 3.

In an alternative implementation of the present embodiment, the protrusions 12 are formed by a stamping process. The protruding portion 12 is manufactured by pressing, and the manufacturing process is simple and low in cost.

In other embodiments of the present example, the protruding portion 12 may be prepared simultaneously with the connecting portion 11 by casting.

It should be noted that, in the present embodiment, the specific connection manner of the protruding portion 12 and the connecting portion 11 is not limited, and in practical application, a person skilled in the art can set the specific connection manner of the protruding portion 12 and the connecting portion 11 according to actual needs. For example, the protruding portion 12 and the connecting portion 11 may be provided as an integral structure, manufactured using the above-described pressing process or casting process, or the protruding portion 12 and the connecting portion 11 may be provided as a separate structure, and the protruding portion 12 may be welded to the connecting portion 11, or the like. Such adjustment and modification of the specific connection manner of the protruding portion 12 and the connecting portion 11 do not deviate from the basic principle of the present utility model, and should be limited within the protection scope of the present utility model.

In an alternative implementation of the present embodiment, the connection portion 11 is welded with the second plate body 2. The connecting part 11 is welded with the second plate body 2, so that the connection is stable and high, and the connection strength of the connecting part 11 and the second plate body 2 can be effectively ensured.

In a further alternative of the present embodiment, the connection portion 11 is brazed to the second plate body 2. The brazing connection enables welding of a plurality of positions of the connection portion 11 to the second plate body 2 at the same time, improving welding efficiency.

Although the connection portion 11 is welded to the second plate body 2 in the above embodiment, this should not limit the scope of the present utility model, and in practical application, the connection portion 11 may be bonded to the second plate body 2. Such adjustment and modification of the specific connection manner of the connection portion 11 and the second plate body 2 do not deviate from the basic principle of the present utility model, and should be limited within the protection scope of the present utility model.

In an alternative implementation of the present embodiment, referring to fig. 7 and 8, the connection portion 11 includes a first connection portion 111 and a plurality of second connection portions 112.

The first connecting part 111 is in a step shape, the first connecting part 111 divides the heat exchange plate into a first area 7 and a second area 8, the liquid inlet end of the first area 7 is communicated with the liquid inlet 5, the liquid outlet end of the second area 8 is communicated with the liquid outlet 6, the liquid outlet end of the first area 7 is communicated with the liquid inlet end of the second area 8, and the first area 7 and the second area 8 both comprise a plurality of heat exchange areas 9; the second connection 112 is located in the heat exchange area 9, and the second connection 112 divides the heat exchange area 9 into a plurality of parallel flow channels 3.

The connecting portion 11 comprises a first connecting portion 111 and a second connecting portion 112, the first connecting portion 111 divides the heat exchange plate into a first area 7 and a second area 8 which are communicated with each other, so that a plurality of heat exchange areas 9 of the heat exchange plate are distributed in a U shape, the large area of the heat exchange plate can be effectively utilized, the heat exchange area of the heat exchange plate is increased, and the heat exchange efficiency is improved.

In an alternative implementation of the present embodiment, referring to fig. 7 and 8, the first connection portion 111 includes an extension section 1111 and a connection section 1112 that are sequentially connected, the extension section 1111 has a plurality of extension sections 1111, and the plurality of extension sections 1111 extend along a first direction, and the connection section 1112 connects adjacent extension sections 1111; in the second direction, the plurality of extension sections 1111 are offset such that the number of flow channels 3 in different heat exchange areas 9 in the flow direction decreases in sequence, wherein the second direction is perpendicular to the first direction. Illustratively, the second direction is a width direction of the heat exchange plate.

The plurality of extension sections 1111 are arranged in a staggered manner in the second direction, so that the number of the flow channels 3 in different heat exchange areas 9 decreases in sequence along the flow direction of the heat exchange medium, wherein the number of the flow channels 3 decreasing each time is not limited, and the number of the flow channels 3 decreasing each time may be one flow channel 3 decreasing each time or two flow channels 3 decreasing each time. The arrangement mode is convenient for manufacturing the heat exchange plate.

Illustratively, the cross-sectional area of each flow channel 3 is equal and the number of flow channels 3 in different heat exchange areas 9 decreases one after the other in the flow direction of the heat exchange medium. In this case, the projection length of the connection section 1112 in the second direction is equal to the width of the second connection portion 112 plus the width of the flow channel 3, wherein the width of the flow channel 3 is the interval between the adjacent two second connection portions 112.

Illustratively, in this embodiment, there are six heat exchange areas 9 from the liquid inlet 5 to the liquid outlet 6, and the number of flow channels 3 in different heat exchange areas 9 decreases from 10 to 5 in sequence along the flow direction of the heat exchange medium.

In an alternative implementation manner of this embodiment, referring to fig. 1 and 3, the number of the first areas 7 is two, the two first areas 7 are symmetrically arranged, and the liquid inlet ends of the two first areas 7 are all communicated with the liquid inlet 5; the number of the second areas 8 is two, the two second areas 8 are symmetrically arranged, the liquid outlet ends of the two second areas 8 are communicated with the liquid outlet 6, and the liquid outlet ends of the two first areas 7 are correspondingly communicated with the liquid inlet ends of the two second areas 8 respectively.

The number of the first areas 7 and the number of the second areas 8 are two, so that the heat exchange plate is divided into two symmetrical parts, two heat exchange routes are formed for respectively exchanging heat between the two parts, and the heat exchange effect and the heat exchange efficiency can be improved.

Although the number of the first areas 7 and the second areas 8 is set to two in the above-mentioned alternative embodiment, this should not limit the scope of the present utility model, and in practical applications, a person skilled in the art may set the number of the first areas 7 and the second areas 8 according to actual needs. For example, in another embodiment of the present application, as shown in fig. 9, the first region 7 and the second region 8 are each provided with one. Such adjustments and changes concerning the number of first areas 7 and second areas 8 do not deviate from the basic principle of the utility model and should be limited within the scope of the utility model.

In a further alternative implementation of the present embodiment, referring to fig. 1 and 3, two first areas 7 are distributed at intervals along the width direction of the heat exchange plate, two second areas 8 are distributed at intervals along the width direction of the heat exchange plate, and the two first areas 7 are located outside the two second areas 8, respectively.

Through such setting mode, the heat transfer medium carries out the heat transfer to the marginal region of battery package earlier at the in-process of carrying out the heat transfer to the battery package, later carries out the heat transfer to the central region of battery package, can reduce the difference in temperature between the different regions of battery package better, improves the heat transfer effect.

In yet another embodiment, referring to fig. 10, two first areas 7 are spaced apart along the width direction of the heat exchange plate, two second areas 8 are spaced apart along the width direction of the heat exchange plate, and the two first areas 7 are located inside the two second areas 8, respectively. The heat exchange is performed on the central area of the battery pack, and then the heat exchange is performed on the edge area of the battery pack.

It should be noted that, the present utility model does not limit the corresponding positional relationship between the first area 7 and the second area 8, and in practical application, a person skilled in the art may set the relative positions of the first area 7 and the second area 8 according to the actual needs. The specific implementation forms of the embodiments described above should not be construed as limiting the scope of the utility model.

In an alternative implementation of the present embodiment, the width of the first connection portion 111 is 2mm to 8mm. The width of the first connecting portion 111 is set to be 2mm to 8mm, so that the first connecting portion 111 and the second plate body 2 are conveniently welded, enough welding area is ensured, and connection stability is improved.

In an alternative implementation of this embodiment, the width of the second connection portion 112 is 2mm to 8mm. The width of the second connecting portion 112 is set to be 2mm to 8mm, so that the second connecting portion 112 and the second plate body 2 are conveniently welded, enough welding area is ensured, and connection stability is improved.

In an alternative implementation of the present embodiment, the cross-sectional area of each flow channel 3 is equal, and the cross-sectional area of the flow channel 3 is 20mm ² ～120mm ² . The sectional area of the flow channel 3 is set to be 20-120 mm ² The flow resistance of the heat exchange medium can be reduced, the heat exchange medium can flow smoothly, the risk of unexpected blockage of the flow channel 3 can be reduced, the heat exchange plate can be kept in a stable shape, and the safety and the heat exchange performance are considered.

Finally, it should be noted that although the heat exchange plates are provided as the first plate body 1 and the second plate body 2 in the alternative embodiment of the present utility model, the different heat exchange areas 9 and the flow passages 3 are formed by making the first plate body 1 include the connection portions 11 and the protruding portions 12, which should not limit the scope of the present utility model. In practice, other configurations may be used by those skilled in the art to form the flow channels 3 and the plurality of heat exchange areas 9 in the heat exchange plate.

As long as the interior of the heat exchange plate has a plurality of communicated heat exchange areas 9 between the liquid inlet 5 and the liquid outlet 6, each heat exchange area 9 comprises a plurality of parallel flow channels 3, and the total cross-sectional areas of the flow channels 3 in different heat exchange areas 9 are sequentially reduced along the flow direction of the heat exchange medium.

For example, the heat exchange plate may also include a first plate, a second plate, a first spacer and a second spacer, where the first plate has a heat exchange cavity therein, and one side of the heat exchange cavity has an opening, and the second plate is connected to the first plate and seals the opening, and both the liquid inlet and the liquid outlet are communicated with the heat exchange cavity; the first spacer is located the heat exchange cavity to separate the heat exchange cavity into first region and the second region of intercommunication, the second spacer is located the heat exchange cavity, and first region and second region all are separated into a plurality of parallelly connected runners by the second spacer, along the flow direction of heat transfer medium, all include a plurality of heat transfer regions that communicate in proper order in first region and the second region, and all include a plurality of runners in every heat transfer region, along the flow direction of heat transfer medium, the total cross-sectional area of the runner in the different heat transfer regions reduces in proper order.

The above-mentioned modifications and changes with respect to the specific implementation of the heat exchange area 9 and the flow channel 3 do not deviate from the basic principle of the present utility model and should be limited within the scope of the present utility model.

Of course, the heat exchange plate described in the embodiment of the utility model is composed of the first plate body 1 and the second plate body 2, and has simple structure, more convenient production and manufacture and low cost.

In addition, the utility model also provides a battery pack, which comprises a battery and the heat exchange plate, wherein the heat exchange plate exchanges heat with the battery.

Thus far, the technical solution of the present utility model has been described in connection with the alternative embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims (11)

1. A heat exchange plate for a heat exchange medium to flow within the heat exchange plate, the heat exchange plate comprising:

the liquid inlet and the liquid outlet are arranged at the same end of the heat exchange plate, and the heat exchange medium flows from the liquid inlet to the liquid outlet;

the heat exchange plate comprises a plurality of heat exchange areas which are sequentially arranged and are in fluid communication along the flow direction of the heat exchange medium, and each heat exchange area comprises a plurality of flow channels which are arranged in parallel;

wherein, along the flow direction, the total sectional area of the flow channels in different heat exchange areas is reduced in sequence.

2. A heat exchanger plate according to claim 1, wherein the number of flow channels in different heat exchanger areas decreases in sequence in the flow direction.

3. A heat exchanger plate according to claim 2, wherein the length of each of the heat exchange areas in the first direction is equal;

and/or, the sectional area of each flow passage is equal, and the number of the flow passages in different heat exchange areas is sequentially decreased by one along the flow direction.

4. A heat exchanger plate according to any one of claims 1 to 3, wherein in each heat exchange area, two adjacent flow channels communicate.

5. A heat exchanger plate according to any one of claims 1-3, wherein the heat exchanger plate comprises a first plate body and a second plate body stacked, the first plate body comprising a connection portion and a protrusion portion, the connection portion being connected to the second plate body, the protrusion portion and the second plate body forming the flow channel therebetween.

6. A heat exchanger plate according to claim 5, wherein the protrusions are formed by a stamping process;

and/or the connecting part is welded with the second plate body.

7. A heat exchange plate according to claim 5, wherein the connection comprises a first connection and a plurality of second connections, the first connection being stepped, the first connection dividing the heat exchange plate into a first region and a second region, the first region and the second region each comprising a plurality of the heat exchange regions;

the second connecting part is positioned in the heat exchange area and divides the heat exchange area into a plurality of parallel runners.

8. A heat exchanger plate according to claim 7, wherein the first connection portion comprises an extension section and a connection section connected in sequence, the extension section having a plurality of and each extending in a first direction, the connection section connecting adjacent extension sections;

in the second direction, the plurality of extension sections are arranged in a staggered manner, so that the number of the flow channels in different heat exchange areas is sequentially decreased along the flowing direction, wherein the second direction is perpendicular to the first direction.

9. A heat exchange plate according to claim 7, wherein the number of the first areas is two, the two first areas are symmetrically arranged, and liquid inlet ends of the two first areas are communicated with the liquid inlet;

the number of the second areas is two, the two second areas are symmetrically arranged, and the liquid outlet ends of the two second areas are communicated with the liquid outlet.

10. A heat exchanger plate according to claim 7, wherein the first connection portion has a width of 2-8 mm;

and/or the width of each second connecting part is equal, and the width of each second connecting part is 2-8 mm;

and/or the sectional area of each flow channel is equal, and the sectional area of the flow channel is 20mm ² ～120mm ² 。

11. A battery pack comprising a battery and a heat exchange plate according to any one of claims 1 to 10, the heat exchange plate exchanging heat with the battery.