CN112117508B - Power battery pack and vehicle with the same - Google Patents

Abstract

The invention discloses a power battery pack and a vehicle having the same, comprising: a first-layer single battery pack and a second-layer single-battery pack, the second-layer single-battery pack and the first-layer single-battery pack The battery packs are arranged in layers; a thermal management assembly is arranged between the first layer of single battery packs and the second layer of single battery packs, and has a structure close to the first layer of single battery packs The first heat exchange cavity and the second heat exchange cavity close to the second layer of single battery pack, the first heat exchange cavity and the second heat exchange cavity are communicated. According to the power battery pack of the present invention, by arranging a thermal management component between the first layer of single battery packs and the second layer of single battery packs, and the thermal management component is provided with a first heat exchange cavity and a second heat exchange cavity, The thermal management assembly can simultaneously exchange heat for the first-layer single battery pack and the second single battery pack, and the thermal management assembly has a simple and compact structure, thereby facilitating the arrangement of the thermal management assembly in the battery pack.

Description

Power battery pack and vehicle with the same

technical field

The invention belongs to the technical field of vehicle manufacturing, and in particular, relates to a power battery pack and a vehicle having the same.

Background technique

In the related art, the thermal management system of the power battery uses a single thermal management system to dissipate heat from the single-layer battery pack. When the power battery is arranged in two layers, it is necessary to set up a thermal management system for each layer of the battery pack, which is complicated in structure. , the design and process are difficult, and the space is large, which is not conducive to the compact requirements of the battery pack of the vehicle.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a power battery pack with compact space and simple structure.

The power battery pack according to the embodiment of the present invention includes: a first layer of single battery packs and a second layer of single battery packs, the second layer of single battery packs and the first layer of single battery packs are stacked on top of each other; a thermal management assembly, the thermal management assembly is arranged between the first layer of single battery packs and the second layer of single battery packs, and has a first heat exchange close to the first layer of single battery packs a cavity and a second heat exchange cavity close to the second layer of single battery packs, and the first heat exchange cavity communicates with the second heat exchange cavity.

According to the power battery pack of the present invention, by arranging a thermal management component between the first layer of single battery pack and the second layer of single battery pack, and the thermal management component is provided with a first heat exchange cavity and a second heat exchange cavity, The thermal management assembly can simultaneously exchange heat for the first-layer single battery pack and the second single battery pack, and the thermal management assembly has a simple and compact structure, thereby facilitating the arrangement of the thermal management assembly in the battery pack.

According to the power battery pack of an embodiment of the present invention, the thermal management assembly has a middle partition plate, and the first heat exchange cavity and the second heat exchange cavity are located on two sides of the middle partition plate, respectively.

According to a power battery pack according to an embodiment of the present invention, the thermal management component includes a hollow casing, the middle partition is arranged in the casing, and the hollow cavity of the casing is divided into the first heat exchange cavity and the second heat exchange cavity.

According to the power battery pack according to an embodiment of the present invention, the first heat exchange cavity is communicated with the second heat exchange cavity, one end of the middle partition plate is spaced apart from the inner wall of the casing to form a gap, and the The first heat exchange cavity and the second heat exchange cavity are communicated through the gap.

According to a power battery pack according to an embodiment of the present invention, the first heat exchange cavity includes at least two separated first sub-heat exchange chambers, and the second heat exchange cavity includes a plurality of separated second sub-cavities A heat exchange cavity, two adjacent second sub heat exchange cavities communicate with each other, and both the outermost two second sub heat exchange cavities communicate with the two first sub heat exchange cavities through the gap , the thermal management assembly has a water inlet and a water outlet respectively connected with the two first sub-heat exchange chambers, and the water inlet and the water outlet are arranged at one end of the thermal management assembly away from the gap . (Supplementary related drawings)

According to the power battery pack according to an embodiment of the present invention, both the first heat exchange cavity and the second heat exchange cavity are provided with a turbulent flow structure.

According to a power battery pack according to an embodiment of the present invention, the spoiler structure includes a plurality of spoiler columns.

According to the power battery pack of an embodiment of the present invention, the first heat exchange cavity and the second heat exchange cavity are each provided with a plurality of the spoiler columns spaced apart and distributed.

The power battery pack according to an embodiment of the present invention further includes: a tray and an upper cover, the tray includes a bottom plate and a side frame; the upper cover and the bottom plate are respectively connected with the upper and lower ends of the side frame to define out of the battery accommodating cavity; the first layer of single battery packs and the second layer of single battery packs each include a plurality of single cells, and the single cells are installed in the battery accommodating cavity,

According to the power battery pack of an embodiment of the present invention, a thermally conductive insulating layer is provided between the single battery and the upper cover.

According to the power battery pack of an embodiment of the present invention, a thermally conductive insulating layer is provided between the single battery and the bottom plate.

According to the power battery pack of an embodiment of the present invention, the upper cover and the bottom plate are both made of aluminum alloy material;

The present invention also provides a vehicle having the power battery pack according to any one of the embodiments of the present invention.

The vehicle and the above-mentioned power battery pack have the same advantages over the prior art, which will not be repeated here.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

1 is a schematic structural diagram of a power battery pack according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a thermal management assembly according to an embodiment of the present invention;

Fig. 3 is a partial enlarged view of Fig. 2 at A;

4 and 5 are schematic structural diagrams of a first-layer single battery pack or a second-layer single battery pack according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a thermal management assembly according to an embodiment of the present invention (part of the casing of the second heat exchange chamber is omitted);

Figure 7 is a cross-sectional view of Figure 6 at A-A;

Fig. 8 is a partial enlarged view of Fig. 7 at B;

FIG. 9 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.

Reference number:

vehicle 1000;

Power battery pack 100;

single battery 10;

The first layer of single battery pack 1;

The second layer of single battery pack 2;

Thermal management assembly 3; first heat exchange cavity 31; first sub heat exchange cavity 311; second heat exchange cavity 32; second sub heat exchange cavity 321; shell 33; Water outlet 36; Water outlet 37; Gap 38;

Tray 41; Upper cover 42; End plate 43;

Thermally conductive insulating layer 5 .

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

The following describes a power battery pack 100 according to an embodiment of the present invention with reference to FIGS. 1-9 .

The power battery pack 100 according to the embodiment of the present invention includes: a first layer of single battery packs 1 and a second layer of single battery packs 2 , and the second layer of single battery packs 2 and the first layer of single battery packs 1 are stacked on top of each other ; Thermal management assembly 3, the thermal management assembly 3 is provided between the first layer of single battery pack 1 and the second layer of single battery pack 2, and has a first heat exchange cavity 31 close to the first layer of single battery pack 1 The first heat exchange cavity 31 and the second heat exchange cavity 32 communicate with the second heat exchange cavity 32 close to the second layer of the single battery pack 2 .

For example, as shown in FIG. 1 , the first layer of single battery packs 1 is arranged below the thermal management component 3 , and the second layer of single battery packs 2 is arranged above the thermal management component 3 .

Therefore, when the battery is in operation, the heat exchange medium in the thermal management assembly 3 will circulate in the first heat exchange cavity 31 and the second heat exchange cavity 32, and the first heat exchange cavity 31 may be the first layer of single layer adjacent to it. The second heat exchange cavity 32 can exchange heat for the second layer of the single battery pack 2 close to it, and the first heat exchange cavity 31 and the second heat exchange cavity 32 of the thermal management assembly 3 are integrated. Between the first single battery pack and the second battery pack, the structure of the thermal management assembly 3 can be made more compact, and the arrangement of the thermal management assembly 3 in the power battery pack 100 is facilitated.

According to the power battery pack 100 of the present invention, the thermal management assembly 3 is provided between the first layer of single battery pack 1 and the second layer of single battery pack 2, and the thermal management assembly 3 is provided with the first heat exchange cavity 31 and The second heat exchange chamber 32 enables the thermal management assembly 3 to exchange heat with the first-layer single battery pack 1 and the second single battery pack at the same time, and the thermal management assembly 3 has a simple and compact structure, thereby facilitating the thermal management assembly 3 Arrangement in the battery pack.

Some embodiments of the power battery pack 100 according to the present invention will be described below with reference to FIGS. 1-9 .

As shown in FIG. 3 , according to the power battery pack 100 according to an embodiment of the present invention, the thermal management assembly 3 has a middle partition plate 34 , and the first heat exchange cavity 31 and the second heat exchange cavity 32 are respectively located on both sides of the middle partition plate 34 Therefore, the first heat exchange cavity 31 and the second heat exchange cavity 32 are separated by the middle partition plate 34, and the arrangement structure of the middle partition plate 34 is simple and convenient for arrangement.

As shown in FIG. 3 , according to the power battery pack 100 according to an embodiment of the present invention, the thermal management assembly 3 includes a hollow casing 33 , a middle partition 34 is arranged in the casing 33 , and the hollow cavity of the casing 33 is divided into a third A heat exchange cavity 31 and a second heat exchange cavity 32 .

A heat exchange cavity for the circulation of the heat dissipation medium is formed in the shell 33, and a middle partition plate 34 is arranged in the shell 33 to form the first heat exchange cavity 31 and the second heat exchange cavity 32, so that the heat exchange medium can be in the first heat exchange cavity 31. Flow in the heat exchange cavity 31 and the second heat exchange cavity 32 facilitates heat exchange for the first layer of single battery packs 1 and the second layer of single battery packs 2 .

As shown in FIGS. 6-8 , in the power battery pack 100 according to an embodiment of the present invention, the first heat exchange cavity 31 and the second heat exchange cavity 32 are in communication, for example, the first heat exchange cavity 31 and the second heat exchange cavity 32 It can be connected in series, one end of the middle partition plate 34 is spaced apart from the inner wall of the shell 33 to form a gap 38, and the first heat exchange cavity 31 and the second heat exchange cavity 32 are communicated through the gap 38, so that the first heat exchange cavity 31 and the second heat exchange cavity 32 communicate with each other through the gap 38. The two heat exchange cavities 32 are connected in series, whereby the first heat exchange cavity 31 and the second heat exchange cavity 32 can be communicated. For example, the heat exchange medium can flow into the first heat exchange cavity 31 from the inlet of the first heat exchange cavity 31 . , and flows into the second heat exchange cavity 32 at the gap 38 and flows out from the second heat exchange cavity 32, so that the heat exchange medium can flow through the first heat exchange cavity 31 and the second heat exchange cavity 32, so that the first heat exchange cavity 31 and the second heat exchange cavity 32 can flow through the The layer single battery and the second layer single battery exchange heat.

According to the power battery pack 100 according to an embodiment of the present invention, as shown in FIGS. 6-8 , the first heat exchange cavity 31 includes at least two separated first sub-heat exchange cavity 311 , and the second heat exchange cavity 32 includes A plurality of separated second sub-heat exchange cavities 321, two adjacent second sub-heat-exchange cavities 321 communicate with each other, and the outermost two second sub-heat-exchange cavities 321 are connected to the two first sub-heat-exchange cavities 321 through the gap 38. The sub-heat exchange chambers 311 communicate with each other, and the thermal management assembly 3 has a water inlet 36 and a water outlet 37 respectively connected to the two first sub-heat exchange chambers 311 , and the water inlet 36 and the water outlet 37 are provided in the away gap 38 of the thermal management assembly 3 One end of the first sub-heat exchange cavity 311 is provided with a water inlet 36, and the water inlet 36 is set at the end of the first sub-heat exchange cavity 311 away from the gap 38, and the other word heat exchange cavity is provided with a water outlet 37 , and the water outlet 37 is disposed at one end of the first sub-heat exchange cavity 311 away from the notch 38 .

For example, in the embodiment shown in FIG. 6 , the first sub-heat exchange cavity 311 located on the first side is connected to the water inlet 36 , the first sub-heat exchange cavity 311 located on the second side is connected to the water outlet 37 , and is located on the first side. The first sub-heat exchange cavity 311 on the side is connected with the second sub-heat exchange cavity 321 on the first side, and the first sub-heat exchange cavity 311 on the second side is connected with the second sub-heat exchange cavity 321 on the first side .

Thus, the heat exchange medium can flow from the water inlet 36 into the first sub heat exchange cavity 311 connected to the water inlet 36, and flow into the second sub heat exchange cavity 321 on the first side through the gap 38, and the heat exchange medium passes through the gap respectively. 38 flows through each sub-heat exchange cavity from the first side to the second side in turn, and flows from the second sub-heat-exchange cavity 321 on the second side into the first sub-heat-exchange cavity 311 connected to the water outlet 37 through the gap 38, and flow out from the water outlet 37 , thereby completing the circulation of the cooling medium in the first heat exchange chamber 31 and the second heat exchange chamber 32 .

Through the arrangement of the first sub-heat exchange cavity 311 and the second sub-heat exchange cavity 321, the heat exchange medium can be circulated in the first sub-heat exchange cavity 311 and the second sub-heat exchange cavity 311 through only one water inlet 36 and the first water outlet 37. In the two sub-heat exchange chambers 321, the circulation of the cooling medium is realized, and then the heat exchange for the first layer of single battery pack 1 and the second layer of single battery pack 2 can be realized.

According to the power battery pack 100 according to an embodiment of the present invention, both the first heat exchange cavity 31 and the second heat exchange cavity 32 are provided with a turbulent flow structure. The second heat exchange cavity 32 is respectively fully heat exchanged with the first layer of single battery pack 1 and the second layer of single battery pack 2 , which can enhance the heat exchange efficiency of the power battery pack 100 .

As shown in FIG. 3 , according to the power battery pack 100 according to an embodiment of the present invention, the turbulence structure includes a plurality of turbulence columns 35 . In some examples, the first heat exchange cavity 31 and the second heat exchange cavity 32 are respectively provided with There are a plurality of turbulent columns 35 distributed at intervals, the arrangement of the plurality of turbulence columns 35 can improve the turbulence effect, and the turbulence columns 35 can extend along the spacing direction of the first heat exchange cavity 31 and the second heat exchange cavity 32 , the structure of the spoiler column 35 is simple, easy to arrange, and can achieve a good spoiler effect, thereby reducing the manufacturing cost of the power battery pack 100 and improving the heat exchange efficiency of the power battery pack 100 .

The power battery pack 100 according to an embodiment of the present invention further includes: a battery pack casing, which is made of a metal material; the first layer of single battery packs 1 and the second layer of single battery packs 2 each include a plurality of single battery packs Each single battery has a battery casing, a battery cell arranged in the battery casing, and a lead terminal connected to the battery core and extending out of the battery casing, and the single battery is installed in the battery pack casing; the first layer of single cells The battery pack 1 and the second layer of single battery packs 2 are both disposed in the battery pack casing, and the battery pack casing is filled with a thermally conductive insulating layer wrapping the first layer of single battery packs 1 and the second layer of single battery packs 2 . In the power battery pack 100 of the present invention, the first layer of single battery pack 1 includes multiple single cells, the second layer of single battery pack 2 includes multiple single cells, and the first layer of single battery pack 1 includes multiple single cells The bulk battery can be laid on one side of the battery pack shell, the plurality of single cells of the second layer of single battery pack 2 can be laid on the other side of the battery pack shell, and the thermal management component 3 is arranged on the first single battery pack The distance between the first heat exchange cavity 31 and the second heat exchange cavity 32 is the same as the distance between the first layer of single battery group 1 and the second layer of single battery group 2 .

In this way, the thermally conductive insulating layer can conduct the heat of the plurality of first-layer single battery packs 1 or the plurality of single cells of the second-layer single battery pack 2 to the thermal management assembly 3 , and conduct heat with the thermal management assembly 3 . heat exchange, so as to achieve heat exchange for the power battery pack 100, and the thermal insulation layer wraps the first layer of single battery pack 1 and the second layer of single battery pack 2, the first layer of single battery pack 1 and the second layer of single battery pack 2 can be The heat from all parts of the layered battery pack 2 (for example, the heat of the single cell of the first layer of single battery pack 1 or the surface of the single cell of the second layer of single battery pack 2 in contact with the thermally conductive insulating layer) is transferred to The thermally conductive insulating layer is transferred from the thermally conductive insulating layer to the thermal management assembly 3 , thereby improving the heat exchange efficiency of the power battery pack 100 .

In the power battery pack 100 proposed by an embodiment of the present application, a plurality of single cells are directly installed in the battery pack casing, which reduces the use of the module frame. Therefore, the utilization of the installation space in the battery pack casing is improved. The number of installed single cells is increased, the battery capacity of the power battery pack 100 is improved, the battery life is improved, the number of components and the assembly process are reduced, and the cost is reduced.

In some embodiments, as shown in FIGS. 4 and 5 , the first layer of single battery packs 11 and the second layer of single battery packs 22 each include a plurality of single cells 10 , and the power battery pack 100 further includes: a tray 41 and the upper cover 42, the tray 41 includes a bottom plate and a side frame; the upper cover 42 and the bottom plate are respectively connected to the upper and lower ends of the side frame to define a battery accommodating cavity, the first layer of single battery pack 1 and the second layer of single battery cells Each of the groups 2 includes a plurality of single cells 10, and the single cells 10 are installed in a battery accommodating cavity provided in the battery pack casing.

For example, a part (multiple) of single cells 10 of the power battery pack 100 are installed in the above-mentioned battery accommodating cavity and below the thermal management assembly 3 to form the first layer of single battery pack 1 , another part of the power battery pack 100 The unit cell(s) 10 are installed in the above-mentioned battery accommodating cavity and above the thermal management assembly 3 to constitute the second-layer unit battery pack 2 .

In some examples, the tray 41 includes a side frame and a bottom plate. In actual implementation, the side frame is a four-frame frame, and the bottom plate is fixedly connected to the bottom surface of the side frame. In some embodiments, the bottom plate and the bottom surface of the side frame are fixedly connected by welding. . A thermally conductive insulating layer 5 may be disposed between the single cell 10 and the bottom plate, and the thermally conductive insulating layer 5 is disposed on the surface of one side of the single cell 10 close to the bottom plate. In this way, the actual heat conduction area between the lower surface of the single cell 10 and the bottom plate can be increased, and the bottom plate can also have a heat dissipation effect.

Both the upper cover 42 and the bottom plate may be made of aluminum alloy material. Aluminum alloy material has good thermal conductivity, low density, light weight, and low price.

In actual implementation, the single cell 10 can be supported on the side frame of the tray 41, and the lower surface of the single cell 10 is spaced apart from the bottom plate of the tray 41, so that the side frame of the base plate, which is far more rigid and stronger than the bottom plate, can be fully utilized. , and the thermally conductive insulating layer 5 can be sandwiched between the single battery 10 and the bottom plate.

In some embodiments, as shown in FIG. 4 and FIG. 5 , a thermally conductive insulating layer 5 is disposed between the single cell 10 and the upper cover 42 . In some examples, the thermally conductive insulating layer 5 is coated on the top of the single cell 10 near the One side surface of the cover 42 .

In some embodiments, as shown in FIG. 4 and FIG. 5 , a thermally conductive insulating layer 5 is disposed between the single battery 10 and the bottom plate. In some examples, the thermally conductive insulating layer 5 is coated on a portion of the single battery 10 close to the bottom plate. side surface.

The thermally conductive insulating layer 5 can conduct the heat of the plurality of single cells 10 to the tray 4111 and/or the upper cover 4212, and exchange heat with the thermal management layer assembly, thereby realizing the heat exchange of the single cells 10, in some examples , the thermally conductive insulating layer 54 can be filled in the battery accommodating cavity, wrapping the plurality of single cells 10 of the first layer of single battery pack 1 and/or wrapping the plurality of single cells 10 of the second layer of single battery pack 2, Thereby, the heat of the unit cell 10 (for example, the heat of the surface of the unit cell 10 in contact with the thermally conductive insulating layer 5) can be transferred to the thermally conductive insulating layer 5, and from the thermally conductive insulating layer 5 to the tray 4111 and/or or the upper cover 4212, and finally transferred to the thermal management assembly 3 for heat exchange, thereby improving the heat exchange efficiency of the power battery pack 100.

For example, as shown in FIG. 1 , the first-layer single battery pack 1 is installed at the lower part of the thermal management assembly 3 , the plurality of single cells 10 of the first-layer single battery pack 1 and the first-layer single battery pack 1 The upper cover 42 is coated with a thermally conductive insulating layer 5; the second layer of the single battery pack 2 is installed on the upper part of the thermal management assembly 3, and the plurality of single cells 10 of the second layer of single battery pack 2 and the second layer of single cells A thermally conductive insulating layer 5 is coated between the bottom plates of the battery pack 2 .

Thus, the first layer of the single battery pack 1 installed under the thermal management assembly 3 can pass through the contact between the plurality of single cells 10 coated on the first layer of the single battery pack 1 and the first layer of the single battery pack 1 . The thermally conductive insulating layer 5 between the upper cover 42 transfers the heat of the plurality of single cells 10 of the first layer of single battery pack 1 to the thermal management assembly 3 through the upper cover 42 of the first layer of single battery pack 1, and is installed The second layer of the single battery pack 2 above the thermal management component 3 can be thermally conducted between the plurality of single cells 10 coated on the second layer of the single battery pack 2 and the bottom plate of the second layer of the single battery pack 2 The insulating layer 5 transfers the heat of the plurality of single cells 10 of the second-layer single battery pack 2 to the thermal management assembly 3 through the bottom plate of the second-layer single battery pack 2 .

As shown in FIG. 4 and FIG. 5 , the single cell 10 is a rectangular cell with a rectangular parallelepiped structure, and has a length L, a thickness D, and a height H between the length L and the thickness D, and the plurality of single cells 10 along the single cell The cells 10 are arranged in the thickness D direction. In this way, a high-density arrangement of the single cells 10 can be realized in the accommodating cavity of the single cells 10 , and each single cell 10 has a surface for heat dissipation with the upper cover 42 .

As shown in FIG. 4 , end plates 43 may be installed on the outer sides of the two outermost single cells 10 along the thickness D direction of the single cells 10 , and the single cells 10 may be connected to the tray 41 through the end plates 43 .

Of course, in other embodiments, both the first layer of single battery pack 1 and the second layer of single battery pack 2 may include a plurality of battery modules, each battery module includes a plurality of single cells, and each battery module includes a plurality of single cells. Each battery module is provided with a module frame, and the module frame is used for positioning the single cells. As shown in FIG. 9 , a vehicle 1000 according to the present invention includes a power battery pack 100 according to any embodiment of the present invention.

The vehicle 1000 according to the present invention has corresponding advantages by providing the power battery pack 100 according to the embodiment of the present invention, which will not be repeated here.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. A power battery pack (100), comprising:

the battery pack comprises a first layer of single battery pack (1) and a second layer of single battery pack (2), wherein the second layer of single battery pack (2) and the first layer of single battery pack (1) are stacked up and down;

the heat management assembly (3) is arranged between the first layer of single battery pack (1) and the second layer of single battery pack (2), and is provided with a first heat exchange cavity (31) close to the first layer of single battery pack (1) and a second heat exchange cavity (32) close to the second layer of single battery pack (2), and the first heat exchange cavity (31) is communicated with the second heat exchange cavity (32);

the heat management assembly (3) is provided with a middle partition plate (34), and the first heat exchange cavity (31) and the second heat exchange cavity (32) are respectively positioned on two sides of the middle partition plate (34); the heat management assembly (3) comprises a hollow shell (33), the middle partition plate (34) is arranged in the shell (33), and the hollow cavity of the shell (33) is divided into the first heat exchange cavity (31) and the second heat exchange cavity (32); the first heat exchange cavity (31) is communicated with the second heat exchange cavity (32), one end of the middle partition plate (34) is spaced from the inner wall of the shell (33) to form a gap (38), and the first heat exchange cavity (31) is communicated with the second heat exchange cavity (32) through the gap (38).

2. The power battery pack (100) according to claim 1, wherein the first heat exchange cavity (31) comprises at least two first sub-heat exchange cavities (311) which are separated, the second heat exchange cavity (32) comprises a plurality of second sub-heat exchange cavities (321) which are separated, two adjacent sub-heat exchange cavities (321) are communicated, and the two outermost sub-heat exchange cavities (321) are communicated with the two first sub-heat exchange cavities (311) through the notch (38), the heat management assembly (3) is provided with a water inlet (36) and a water outlet (37) which are respectively connected with the two first sub-heat exchange cavities (311), and the water inlet (36) and the water outlet (37) are arranged at one end of the heat management assembly (3) which is far away from the notch (38).

3. The power battery pack (100) according to claim 1, wherein a flow disturbing structure is arranged in each of the first heat exchange cavity (31) and the second heat exchange cavity (32).

4. A power pack (100) according to claim 3, wherein the flow perturbation structure comprises a plurality of flow perturbation columns (35).

5. The power battery pack (100) according to claim 4, wherein a plurality of the turbulence columns (35) are distributed at intervals in the first heat exchange cavity (31) and the second heat exchange cavity (32).

6. The power battery pack (100) according to any one of claims 1-5, further comprising:

a tray (41) and an upper cover (42), the tray (41) comprising a bottom plate and side frames; the upper cover (42) and the bottom plate are respectively connected with the upper end and the lower end of the side frame to limit a battery accommodating cavity;

first layer battery cell group (1) with second layer battery cell group (2) all include a plurality of battery cell (10), battery cell (10) install in the battery holds the intracavity.

7. The power battery pack (100) according to claim 6, wherein a heat conducting and insulating layer (5) is arranged between the single batteries (10) and the upper cover (42).

8. The power battery pack (100) according to claim 6, wherein a heat conducting and insulating layer (5) is arranged between the single batteries (10) and the bottom plate.

9. The power battery pack (100) of claim 6, wherein the upper cover (42) and the bottom plate are both made of aluminum alloy material.

10. A vehicle (1000) characterized by having a power battery pack (100) according to any one of claims 1-6.

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