Heat exchange plate assembly, power battery and electric vehicle

Abstract

The utility model provides a heat exchange plate assembly, a power battery and an electric vehicle, and the heat exchange plate assembly comprises a substrate, a first heat exchange assembly and a second heat exchange assembly. The first heat exchange assembly comprises a first heat exchange plate, the first heat exchange plate is arranged on one side of the base plate, and a first heat exchange flow channel is formed between the first heat exchange plate and the base plate. The second heat exchange assembly comprises a second heat exchange plate, the second heat exchange plate is arranged on the other side of the base plate, and a second heat exchange runner is formed between the second heat exchange plate and the base plate. The first heat exchange plate and the second heat exchange plate are arranged on the two sides of the base plate correspondingly, the first heat exchange flow channel and the second heat exchange flow channel which are of a double-layer structure form are formed, and therefore the heat exchange efficiency is improved in the high-temperature or low-temperature environment. The heat exchange medium in the first heat exchange flow channel and the second heat exchange flow channel can enable the substrate, the first heat exchange plate and the second heat exchange plate to be quickly and uniformly cooled or heated, so that the power battery can be quickly and uniformly cooled or heated. Therefore, the higher-standard heat exchange requirement of the power battery can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle power batteries, in particular to a heat exchange plate assembly, a power battery and an electric vehicle. BACKGROUND

[0002] As a core component of an electric vehicle, the working temperature of a power battery directly affects the performance and service life of the battery. With the increase in size and capacity of the power battery, the heat exchange mode of setting a liquid cooling plate under the battery cell in the related art is difficult to meet the higher standard heat exchange requirements of the power battery. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a heat exchange plate assembly, a power battery and an electric vehicle, which can further improve the heat exchange efficiency of the power battery and effectively meet the higher standard heat exchange requirements of the power battery.

[0004] In a first aspect, the present application provides a heat exchange plate assembly, comprising:

[0005] a base plate;

[0006] a first heat exchange assembly comprising a first heat exchange plate, the first heat exchange plate being arranged on one side of the base plate and forming a first heat exchange flow channel with the base plate; and

[0007] a second heat exchange assembly comprising a second heat exchange plate, the second heat exchange plate being arranged on the other side of the base plate and forming a second heat exchange flow channel with the base plate.

[0008] The scheme provided by the embodiments of the present application forms the first heat exchange flow channel and the second heat exchange flow channel with a double-layer structure by arranging the first heat exchange plate and the second heat exchange plate on the two sides of the base plate. In this way, one layer of heat exchange structure is added compared with the single-layer liquid cooling plate in the prior art, and the heat exchange efficiency is higher. Meanwhile, in a high-temperature or low-temperature environment, different heat exchange efficiency mediums can flow in the first heat exchange flow channel and the second heat exchange flow channel, so that the base plate, the first heat exchange plate and the second heat exchange plate can be quickly and uniformly cooled or heated, and the power battery can be quickly and uniformly cooled or heated. Therefore, compared with the heat exchange mode of setting a liquid cooling plate under the battery cell in the related art, the scheme of the present application can meet the higher standard heat exchange requirements of the power battery.

[0009] In combination with the first aspect, in some possible implementation manners, the second heat exchange flow channel comprises:

[0010] a plurality of second sub-flow channels arranged in a linear array along a first direction, each of the second sub-flow channels extending along a second direction;

[0011] wherein the first direction and the second direction are arranged at an angle.

[0012] With reference to the first aspect and the above implementation manners, in some possible implementation manners, the second heat exchange flow channel comprises:

[0013] an inlet flow channel and an outlet flow channel, the inlet flow channel and the outlet flow channel being oppositely and spacedly arranged, and each of the inlet flow channel and the outlet flow channel comprising a plurality of second sub-flow channels arranged in parallel;

[0014] a first connecting flow channel located at one side of the inlet flow channel and the outlet flow channel and connecting the inlet flow channel and the outlet flow channel.

[0015] With reference to the first aspect and the above implementation manners, in some possible implementation manners, the second heat exchange assembly further comprises a first inlet joint and a first outlet joint;

[0016] the second heat exchange flow channel further comprises a second connecting flow channel and a third connecting flow channel;

[0017] the first inlet joint, the first outlet joint, the second connecting flow channel and the third connecting flow channel are arranged at the other side of the inlet flow channel and the outlet flow channel with respect to the first connecting flow channel; the first inlet joint is connected to the inlet flow channel through the second connecting flow channel, and the first outlet joint is connected to the outlet flow channel through the third connecting flow channel.

[0018] With reference to the first aspect and the above implementation manners, in some possible implementation manners, the first heat exchange flow channel comprises:

[0019] a plurality of first sub-flow channels arranged in a linear array along a second direction, and each of the first sub-flow channels being arranged along a first direction;

[0020] wherein the first direction is arranged at an angle with respect to the second direction.

[0021] With reference to the first aspect and the above implementation manners, in some possible implementation manners, the first heat exchange flow channel comprises:

[0022] a first flow channel;

[0023] a second flow channel symmetrically arranged with respect to the first flow channel about the second direction;

[0024] wherein the first flow channel and the second flow channel each comprise a plurality of first sub-flow channels, and at least two adjacent first sub-flow channels in the plurality of first sub-flow channels are connected end to end.

[0025] With reference to the first aspect and the above implementation manners, in some possible implementation manners, the first heat exchange assembly further includes a second liquid inlet joint, a third liquid inlet joint, and a second liquid outlet joint, the second liquid outlet joint is located between the second liquid inlet joint and the third liquid inlet joint;

[0026] Two ends of the first flow channel are connected with the second liquid inlet joint and the second liquid outlet joint respectively;

[0027] Two ends of the second flow channel are connected with the third liquid inlet joint and the second liquid outlet joint respectively.

[0028] With reference to the first aspect and the above implementation manners, in some possible implementation manners, the second heat exchange plate forms a first stamping groove on a side close to the base plate, and the first stamping groove and the base plate form the second heat exchange flow channel; and / or

[0029] The first heat exchange plate forms a second stamping groove on a side close to the base plate, and the second stamping groove and the base plate form the first heat exchange flow channel.

[0030] In a second aspect, the present application further provides a power battery, comprising:

[0031] The heat exchange plate assembly according to any one of the above first aspect, and

[0032] A plurality of battery cells, the battery cells are arranged in close contact with the heat exchange plate assembly.

[0033] In a third aspect, the present application further provides an electric vehicle, comprising:

[0034] The power battery according to the above second aspect;

[0035] A waste heat recovery unit connected with the first heat exchange flow channel and / or the second heat exchange flow channel, used for heating a heat exchange medium and making the heated heat exchange medium form a heating cycle in the first heat exchange flow channel and / or the second heat exchange flow channel.

[0036] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the application. The accompanying drawings are included to provide a description of embodiments and are not meant to limit the scope of the application. Furthermore, the drawings are not to scale and are included herewith to describe what is meant by the terminology used to describe various elements as used herein. In the drawings:

[0038] Figure 1Figure 1 is a structural schematic diagram of a power battery and a waste heat recovery unit connected in an electric vehicle provided by an embodiment of the present application;

[0039] Figure 2 Figure 2 is a sectional view along line A-A in Figure 1; Figure 1

[0040] Figure 3 Figure 3 is an enlarged structural schematic diagram of part I in Figure 2; Figure 2

[0041] Figure 4 Figure 4 is a structural schematic diagram of a power battery in Figure 2; Figure 1

[0042] Figure 5 Figure 5 is a bottom view of the power battery in Figure 2. Figure 4

[0043] The following is a description of the reference signs in the drawings:

[0044] 1—power battery;

[0045] 10—heat exchange plate assembly;

[0046] 100—base plate;

[0047] 200—first heat exchange assembly;

[0048] 210—first heat exchange plate; 211—first heat exchange flow channel; 212—first flow channel; 213—second flow channel; 214—first sub-flow channel;

[0049] 220—second liquid inlet joint;

[0050] 230—third liquid inlet joint;

[0051] 240—second liquid outlet joint;

[0052] 300—second heat exchange assembly;

[0053] 310—second heat exchange plate; 311—second heat exchange flow channel; 312—liquid inlet flow channel; 313—liquid outlet flow channel; 314—second sub-flow channel; 315—first connecting flow channel; 3150—connecting sub-flow channel; 316—second connecting flow channel; 317—third connecting flow channel;

[0054] 320—first liquid inlet joint;

[0055] 330—first liquid outlet joint;

[0056] 20—battery cell;

[0057] 2—waste heat recovery unit;

[0058] X—first direction; Y—second direction.​​​​ DETAILED DESCRIPTION

[0059] The embodiments of the present application will be described in detail with reference to the drawings. The following examples are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "including," "comprising," "having" and "with" and variations thereof herein are meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0061] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0062] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0063] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0064] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0065] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character "" in this paper generally represents that the associated objects before and after are in an "or" relationship.

[0066] The power battery is a core component of an electric vehicle, and its working temperature directly affects the battery performance and service life. With the increase of the size and capacity of the power battery, the heat exchange mode in the related art of setting a liquid cooling plate under the battery cell of the power battery is difficult to meet the higher standard heat exchange requirement of the power battery.

[0067] To solve the above technical problems, the embodiments of the present application provide a heat exchange plate assembly, a power battery and an electric vehicle. The heat exchange plate assembly, the power battery and the electric vehicle provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings of the specification.

[0068] Please refer to Figure 1 and Figure 2 The electric vehicle provided by the present application includes a power battery 1. The power battery 1 includes a heat exchange plate assembly 10 and a plurality of battery cells 20. The battery cell 20 includes a positive and negative electrode, a separator and an electrolyte, and is a basic unit for storing and releasing energy in the power battery 1. The battery cell 20 can be divided into cylindrical battery cells, square battery cells and soft package battery cells in shape, and lithium iron phosphate batteries, ternary lithium batteries, etc. in positive electrode material. Referring to Figure 3 、 Figure 4 and Figure 5The heat exchange plate assembly 10 comprises a base plate 100, a first heat exchange assembly 200, and a second heat exchange assembly 300. The base plate 100 is the basis for mounting the first heat exchange assembly 200 and the second heat exchange assembly 300, and can provide stable support for the first heat exchange assembly 200 and the second heat exchange assembly 300. The base plate 100 can generally adopt a flat plate. The first heat exchange assembly 200 comprises a first heat exchange plate 210 arranged on one side of the base plate 100 and forming a first heat exchange flow channel 211 with the base plate 100; the second heat exchange assembly 300 comprises a second heat exchange plate 310 arranged on the other side of the base plate 100 and forming a second heat exchange flow channel 311 with the base plate 100. The battery cell 20 is arranged in close contact with the heat exchange plate assembly 10.

[0069] The first heat exchange flow channel 211 and the second heat exchange flow channel 311 are used to flow a heat exchange medium for cooling or heating. The heat exchange medium can be water, refrigerant, ethylene glycol solution, oil, etc., and the heat exchange medium can absorb and release heat. The first heat exchange flow channel 211 and the second heat exchange flow channel 311 can flow the same heat exchange medium or different heat exchange media, and this is not limited.

[0070] The first heat exchange plate 210 and the second heat exchange plate 310 are arranged on both sides of the base plate 100 to form the first heat exchange flow channel 211 and the second heat exchange flow channel 311 with a double-layer structure. Compared with the single-layer liquid cooling plate of the prior art, one layer of heat exchange structure is added, and the heat exchange efficiency is higher. At the same time, in a high-temperature or low-temperature environment, different heat exchange efficiency media can flow in the first heat exchange flow channel 211 and the second heat exchange flow channel 311, so that the base plate 100, the first heat exchange plate 210, and the second heat exchange plate 310 can be quickly and uniformly cooled or heated, and the power battery can be quickly and uniformly cooled or heated. Therefore, compared with the related art, the heat exchange plate assembly 10 can meet the higher heat exchange requirements of the power battery.

[0071] Referring to Figure 1 and Figure 4 In some embodiments, the second heat exchange flow channel 311 comprises a plurality of second sub-flow channels 314, which are arranged in a linear array along the first direction X, and each second sub-flow channel 314 extends along the second direction Y. The first direction X and the second direction Y are arranged at an angle. Figure 1 and Figure 4 As shown in the drawings, the plurality of second sub-flow channels 314 extend along the second direction Y to form a strip shape, and the area of the plurality of second sub-flow channels 314 arranged in a linear array along the first direction X is equivalent to the surface area of the plurality of battery cells 20, so as to basically cover the battery cells 20, and the heat exchange medium in the second heat exchange flow channel 311 can be efficiently exchanged with the battery cells 20.

[0072] Referring to Figure 1 and Figure 4 In some embodiments, the second heat exchange channel 311 comprises an inlet flow channel 312, an outlet flow channel 313, and a first connecting flow channel 315. The inlet flow channel 312 and the outlet flow channel 313 are oppositely and spacedly arranged. The inlet flow channel 312 and the outlet flow channel 313 each comprise a plurality of second sub-flow channels 314 arranged in parallel. The first connecting flow channel 315 is located at one side of the inlet flow channel 312 and the outlet flow channel 313, and is connected to the inlet flow channel 312 and the outlet flow channel 313. In this way, the heat exchange medium can flow through the inlet flow channel 312, the first connecting flow channel 315, and the outlet flow channel 313 of the second heat exchange channel 311 in sequence. Moreover, since the inlet flow channel 312 and the outlet flow channel 313 each comprise a plurality of second sub-flow channels 314 arranged in parallel, the heat exchange medium can flow into the inlet flow channel 312 and flow out of the outlet flow channel 313 in multiple parallel paths, effectively reducing the temperature difference of the battery cells 20 at different positions and reducing the uneven distribution of temperature. Figure 4 In addition, referring to , the first connecting flow channel 315 can further comprise a plurality of connecting sub-flow channels 3150 arranged in a linear array along the second direction Y. Each connecting sub-flow channel 3150 extends along the first direction X. The plurality of connecting sub-flow channels 3150 can make the heat exchange medium flow into the outlet flow channel 313 from the inlet flow channel 312 in multiple paths. In this way, the flow rate of the heat exchange medium flowing through the first connecting flow channel 315 can be effectively increased, and the heat exchange efficiency can be improved.

[0073] To facilitate the transportation of the heat exchange medium, in some embodiments, a corresponding interface can be provided corresponding to the second heat exchange channel 311. For example, referring to Figure 4The second heat exchange assembly 300 can further include a first liquid inlet connector 320 and a first liquid outlet connector 330; the second heat exchange channel 311 can further include a second connecting channel 316 and a third connecting channel 317; the first liquid inlet connector 320, the first liquid outlet connector 330, the second connecting channel 316 and the third connecting channel 317 are arranged on the other side of the liquid inlet channel 312 and the liquid outlet channel 313 relative to the first connecting channel 315; the first liquid inlet connector 320 is connected to the liquid inlet channel 312 through the second connecting channel 316, and the first liquid outlet connector 330 is connected to the liquid outlet channel 313 through the third connecting channel 317. The heat exchange medium can flow into the second heat exchange channel 311 from the first liquid inlet connector 320, and then flow out of the second heat exchange channel 311 from the first liquid outlet connector 330. In this way, the pipeline of the refrigeration unit or the heating unit can be conveniently and quickly connected to the second heat exchange channel 311 through the first liquid inlet connector 320 and the first liquid outlet connector 330, so as to realize the cooling or heating of the power battery. The one end of the second connecting channel 316 is connected to the first liquid inlet connector 320, and the other end can be connected to the multiple parallel second sub-channels 314 of the liquid inlet channel 312 through multiple interfaces. Similarly, the one end of the third connecting channel 317 is connected to the first liquid outlet connector 330, and the other end can be connected to the multiple parallel second sub-channels 314 of the liquid outlet channel 313 through multiple interfaces.

[0074] Referring to Figure 5 In some embodiments, the first heat exchange channel 211 includes multiple first sub-channels 214, and the multiple first sub-channels 214 are arranged in a linear array along the second direction Y, and each first sub-channel 214 extends along the first direction X. The first direction X is arranged at an angle to the second direction Y. Figure 5As shown, the plurality of first sub-flow channels 214 extend in the first direction X to form a strip shape, and the area of the plurality of first sub-flow channels 214 arranged in a linear array in the second direction Y is equivalent to the surface area of the plurality of battery cells 20, so as to substantially cover the battery cells 20, and then effectively transfer the cold or heat of the heat exchange medium in the first heat exchange flow channel 211 to the battery cells 20. In addition, since the substrate 100 and the second heat exchange plate 310 are located between the first heat exchange plate 210 and the battery cells 20, the second heat exchange flow channel 311 is located between the first heat exchange flow channel 211 and the battery cells 20. By setting the extension direction of the first sub-flow channel 214 of the first heat exchange flow channel 211 and the extension direction of the second sub-flow channel 314 of the second heat exchange flow channel 311 as the first direction X and the second direction Y respectively, and setting the arrangement direction of the first sub-flow channel 214 of the first heat exchange flow channel 211 and the arrangement direction of the second sub-flow channel 314 of the second heat exchange flow channel 311 as the second direction Y and the first direction X respectively, and setting the first direction X and the second direction Y at an angle, that is, setting the first sub-flow channel 214 and the second sub-flow channel 314 at an angle, the heat exchange efficiency of the first heat exchange flow channel 211 and the second heat exchange flow channel 311 can be increased, and the cold or heat of the heat exchange medium in the first heat exchange flow channel 211 can be efficiently transferred to the battery cells 20 through the second heat exchange flow channel 311.

[0075] Referring to Figure 5 In some embodiments, the first heat exchange flow channel 211 includes a first flow channel 212 and a second flow channel 213, and the second flow channel 213 is symmetrically arranged with the first flow channel 212 about the second direction Y; wherein the first flow channel 212 and the second flow channel 213 each include a plurality of first sub-flow channels 214, and at least two adjacent first sub-flow channels 214 in the plurality of first sub-flow channels 214 are connected end to end. In this way, the heat exchange medium can flow through the first flow channel 212 and the second flow channel 213 at the same time, thereby simultaneously exchanging heat with the battery cells 20 corresponding to different parts of the first flow channel 212 and the second flow channel 213, effectively reducing the temperature difference between the plurality of battery cells 20 and reducing the uneven distribution of temperature. In addition, for the plurality of first sub-flow channels 214 of the first flow channel 212 or the second flow channel 213, in some embodiments, the adjacent two first sub-flow channels 214 can be connected end to end, so that the heat exchange medium flows through the first heat exchange flow channel 211 in one way. In other embodiments, in order to increase the flow of the heat exchange medium through the first flow channel 212 or the second flow channel 213, the adjacent plurality of first sub-flow channels 214 in the first flow channel 212 or the second flow channel 213 can also be connected end to end, so that the heat exchange medium flows through the first heat exchange flow channel 211 in multiple ways, for example, Figure 5 In some embodiments, the adjacent three first sub-flow channels 214 are connected end to end, so that the heat exchange medium flows through the first heat exchange flow channel 211 in three ways.

[0076] In order to facilitate the delivery of the heat exchange medium, in some embodiments, an interface can be provided corresponding to the first heat exchange flow channel 211. For example, referring to Figure 4 The first heat exchange assembly 200 can further include a second liquid inlet connector 220, a third liquid inlet connector 230, and a second liquid outlet connector 240, wherein the second liquid outlet connector 240 is located between the second liquid inlet connector 220 and the third liquid inlet connector 230; the two ends of the first flow channel 212 are connected to the second liquid inlet connector 220 and the second liquid outlet connector 240, respectively; and the two ends of the second flow channel 213 are connected to the third liquid inlet connector 230 and the second liquid outlet connector 240, respectively. In this way, the pipeline of the refrigeration unit or the heating unit can be conveniently and quickly connected to the first heat exchange flow channel 211 through the second liquid inlet connector 220, the third liquid inlet connector 230, and the second liquid outlet connector 240. It should be understood that the first flow channel 212 and the second flow channel 213 of the first heat exchange flow channel 211 are two independent first heat exchange flow channels 211, each connected to a second liquid inlet connector 220 and a third liquid inlet connector 230 to introduce the heat exchange medium, and the heat exchanged heat exchange medium can be returned to the refrigeration unit or the heating unit through a common second liquid outlet connector 240. For example, Figure 4 The heat exchange medium can flow into the first heat exchange flow channel 211 from the second liquid inlet connector 220 and the third liquid inlet connector 230 on the left and right sides, and then flow out of the first heat exchange flow channel 211 from the second liquid outlet connector 240 in the middle and return to the refrigeration unit or the heating unit.

[0077] It should be noted that the second heat exchange flow channel 311 and the first heat exchange flow channel 211 can be arranged in various ways. In one possible implementation, a groove can be formed in at least one of the base plate 100 or the second heat exchange plate 310, and the second heat exchange flow channel 311 can be formed by the cooperation of the base plate 100 and the second heat exchange plate 310. Similarly, a groove can also be formed in at least one of the base plate 100 or the first heat exchange plate 210, and the first heat exchange flow channel 211 can be formed by the cooperation of the base plate 100 and the first heat exchange plate 210. Considering factors such as production efficiency, operational convenience, machining precision, and cost, the groove can be machined by stamping. Of course, the groove can also be machined by removing material or other methods. When the stamping machining method is used, in one possible implementation, a first stamping groove can be formed on the side of the second heat exchange plate 310 close to the base plate 100, and the first stamping groove and the base plate 100 form the second heat exchange flow channel 311; or a second stamping groove can be formed on the side of the first heat exchange plate 210 close to the base plate 100, and the second stamping groove and the base plate 100 form the first heat exchange flow channel 211.

[0078] In addition, considering that the heating unit such as the heating film consumes the power of the power battery in the process of heating the power battery, thereby reducing the available mileage of the electric vehicle, the electric vehicle provided by the embodiment of the present application can further comprise a waste heat recovery unit 2, as shown in Figure 1 The power battery 1 is outside the dashed box, and the waste heat recovery unit 2 is inside the dashed box. The waste heat recovery unit 2 is connected with the first heat exchange flow channel 211 and / or the second heat exchange flow channel 311, so as to form a heating cycle of the heat exchange medium in the first heat exchange flow channel 211 and / or the second heat exchange flow channel 311.

[0079] It can be understood that the waste heat recovery unit 2 can be a waste heat recovery structure arranged on the heat generating components such as the motor and the engine, for example, a cooling water pipeline, and the waste heat recovery structure exchanges heat with the motor and / or the engine to obtain the waste heat of the motor and / or the engine, and then heats the battery cell 20 of the power battery 1 through the first heat exchange flow channel 211 and / or the second heat exchange flow channel 311.

[0080] The scheme provided by the present application can absorb the waste heat of the heat generating components of the electric vehicle by the waste heat recovery unit 2 and input the waste heat into the first heat exchange flow channel 211 and / or the second heat exchange flow channel 311 to heat the power battery 1, which can replace the heating unit such as the heating film in the related art, thereby reducing the power consumption of the power battery 1 due to the heating of the heating unit, and further reducing the power consumption of the power battery 1 in the heating process while ensuring the performance and service life of the power battery 1, thereby improving the mileage of the electric vehicle.

[0081] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the present application, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heat exchange plate package (10), characterized in that include: substrate(100); The first heat exchange assembly (200) includes a first heat exchange plate (210), the first heat exchange plate (210) being disposed on one side of the substrate (100) and forming a first heat exchange channel (211) between the first heat exchange plate (210) and the substrate (100); and The second heat exchange assembly (300) includes a second heat exchange plate (310), which is disposed on the other side of the substrate (100) and forms a second heat exchange channel (311) with the substrate (100).

2. The heat exchange plate assembly (10) according to claim 1, characterized in that The second heat exchange channel (311) includes: Multiple second sub-channels (314) are arranged in a linear array along the first direction (X), and each second sub-channel (314) extends along the second direction (Y); The first direction (X) and the second direction (Y) are set at an angle.

3. The heat exchange plate assembly (10) according to claim 2, characterized in that The second heat exchange channel (311) includes: The inlet channel (312) and the outlet channel (313) are arranged opposite to each other and spaced apart. Each inlet channel (312) and outlet channel (313) includes multiple parallel-connected second sub-channels (314). The first connecting channel (315) is located on one side of the inlet channel (312) and the outlet channel (313), and connects the inlet channel (312) and the outlet channel (313).

4. The heat exchange plate assembly (10) according to claim 3, characterized in that The second heat exchange assembly (300) also includes a first liquid inlet connector (320) and a first liquid outlet connector (330). The second heat exchange channel (311) also includes a second connecting channel (316) and a third connecting channel (317). The first inlet connector (320), the first outlet connector (330), the second connecting channel (316), and the third connecting channel (317) are disposed on the other side of the inlet channel (312) and the outlet channel (313) relative to the first connecting channel (315); the first inlet connector (320) is connected to the inlet channel (312) through the second connecting channel (316), and the first outlet connector (330) is connected to the outlet channel (313) through the third connecting channel (317).

5. The heat exchange plate assembly (10) according to any one of claims 2-4, characterized in that The first heat exchange channel (211) includes: Multiple first sub-channels (214) are arranged in a linear array along the second direction (Y), and each first sub-channel (214) extends along the first direction (X); The first direction (X) and the second direction (Y) are set at an angle.

6. The heat exchange plate assembly (10) according to claim 5, characterized in that The first heat exchange channel (211) includes: First flow channel (212); The second flow channel (213) is symmetrically arranged with respect to the first flow channel (212) about the second direction (Y); The first flow channel (212) and the second flow channel (213) each include a plurality of first sub-flow channels (214), and at least two adjacent first sub-flow channels (214) are connected end to end.

7. The heat exchange plate assembly (10) according to claim 6, characterized in that The first heat exchange component (200) further comprises a second liquid inlet joint (220), a third liquid inlet joint (230) and a second liquid outlet joint (240), wherein the second liquid outlet joint (240) is located between the second liquid inlet joint (220) and the third liquid inlet joint (230); Two ends of the first flow channel (212) are connected with the second liquid inlet joint (220) and the second liquid outlet joint (240) respectively; Two ends of the second flow channel (213) are connected with the third liquid inlet joint (230) and the second liquid outlet joint (240) respectively.

8. The heat exchange plate assembly (10) according to claim 1, characterized in that The second heat exchange plate (310) is formed with a first stamping groove on a side close to the base plate (100), and the first stamping groove forms the second heat exchange flow channel (311) with the base plate (100); and / or The first heat exchange plate (210) is formed with a second stamping groove on a side close to the base plate (100), and the second stamping groove forms the first heat exchange flow channel (211) with the base plate (100).

9. A power cell (1) characterized in that The heat exchange plate assembly (10) according to any one of claims 1-8, and A plurality of battery cells (20) are arranged in close contact with the heat exchange plate assembly (10). The power battery (1) according to claim 9; 10. An electric vehicle characterized by comprising: A waste heat recovery unit (2) is connected with the first heat exchange flow channel (211) and / or the second heat exchange flow channel (311) to heat a heat exchange medium and make the heated heat exchange medium form a heating cycle in the first heat exchange flow channel (211) and / or the second heat exchange flow channel (311). ​ ​

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