CN219286508U - Battery pack, battery pack, and vehicle - Google Patents

Abstract

The disclosure relates to a battery assembly, a battery pack and a vehicle, wherein the battery assembly comprises a battery cell, a cooling plate and a heat pipe, the battery cell comprises a first radiating surface and a second radiating surface, and the first radiating surface is intersected with the second radiating surface; the cooling plate comprises a first cooling surface, and the first cooling surface is in contact with the first cooling surface; the heat pipe comprises a second cooling surface, the second cooling surface is intersected with the first cooling surface, and the second cooling surface is in contact with the second cooling surface; at least one part of the second cooling surface is arranged at the evaporation section of the heat pipe, and the condensation section of the heat pipe is connected with the cooling plate. The battery assembly of the embodiment of the disclosure has the advantages of long service life of the battery core and the like.

Description

Battery pack, battery pack, and vehicle

Technical Field

The disclosure relates to the technical field of power batteries, and in particular relates to a battery assembly, a battery pack and a vehicle.

Background

The power source of the electric automobile is a power battery, when the automobile discharges at different multiplying powers, the battery core can generate a large amount of heat at different rates, and uneven heat accumulation can be generated in the battery pack due to time accumulation and space influence, so that the temperature of the battery core in the battery pack is uneven. In addition, in battery charging scenarios, such as fast and slow battery charging scenarios, the battery cells also generate a large amount of heat.

In the related art, a cooling plate is generally arranged on one side of the battery cell, and the heat dissipation efficiency of one side of the battery cell, which is far away from the cooling plate, is lower, so that the problem of poor temperature uniformity still exists in the battery cell. For example, a cooling plate is arranged at the bottom of the battery cell, the top heat dissipation effect of the battery cell is low, and the temperature uniformity of the battery cell is still poor in the direction from the top to the bottom of the battery cell, so that the service life of the battery cell is short.

Disclosure of Invention

The present disclosure aims to solve, at least to some extent, one of the technical problems in the related art.

To this end, embodiments of the present disclosure provide a battery assembly to extend the service life of the battery cells

The battery assembly comprises a battery cell, a cooling plate and a heat pipe, wherein the battery cell comprises a first radiating surface and a second radiating surface, and the first radiating surface is intersected with the second radiating surface; the cooling plate comprises a first cooling surface, and the first cooling surface is in contact with the first cooling surface; the heat pipe comprises a second cooling surface, the second cooling surface is intersected with the first cooling surface, and the second cooling surface is in contact with the second cooling surface; at least one part of the second cooling surface is arranged at the evaporation section of the heat pipe, and the condensation section of the heat pipe is connected with the cooling plate.

In some embodiments, the cooling plate includes a media inlet, a media outlet, and a media flow passage, both in communication with the media flow passage; at least a part of the condensing section is arranged in the medium flow passage.

In some embodiments, the heat pipe is a plate-shaped heat pipe, the heat pipe includes a plurality of heat conduction channels, the extending direction of the heat conduction channels is parallel to the second cooling surface, and the extending direction of the heat conduction channels intersects the first cooling surface.

In some embodiments, the battery assembly further comprises a first thermally conductive layer sandwiched between the first cooling surface and the first cooling surface; the second heat conduction layer is clamped between the second heat dissipation surface and the second cooling surface.

In some embodiments, the first heat conductive layer is a first heat conductive rubber pad, and the first heat dissipating surface and the first cooling surface are bonded to the first heat conductive rubber pad; and/or the second heat conduction layer is a second heat conduction rubber pad, and the second radiating surface and the second cooling surface are bonded with the second heat conduction rubber pad.

In some embodiments, the number of the electric cores is a plurality, and the first heat dissipation surfaces of at least two electric cores are in contact with the same first cooling surface.

In some embodiments, the number of the electric cores is a plurality, and at least one heat pipe is clamped between the second radiating surfaces of at least two electric cores. The plurality of battery cells form a plurality of battery packs, and each battery pack comprises at least two battery cells; the number of the heat pipes is multiple, the heat pipes are in one-to-one correspondence with the battery packs, and each heat pipe is clamped between the corresponding battery cells of the battery pack.

The embodiment of the disclosure also provides a battery pack with the battery assembly.

The battery pack of the embodiment of the disclosure comprises a box body and a battery assembly, wherein the battery assembly is the battery assembly of any one of the embodiments, and the battery assembly is arranged in the box body.

The embodiment of the disclosure also provides a vehicle with the battery pack

The vehicle of the embodiment of the disclosure comprises a vehicle body and a battery pack, wherein the battery pack is arranged on the vehicle body, and the battery pack is any one of the battery packs described in the embodiment.

The battery component of the embodiment of the disclosure utilizes the first radiating surface to be in contact with the first cooling surface, so that heat exchange can be carried out between the first radiating surface and the first cooling surface, and the cooling plate is utilized to take away the heat of the battery core, so that the cooling and heat dissipation of the battery core are realized; the second cooling surface is in contact with the second cooling surface, so that heat exchange can be performed between the second cooling surface and the second cooling surface, and the heat of the battery cell is taken away by the heat pipe, so that the battery cell is cooled and radiated. Because the first cooling surface is intersected with the second cooling surface, the second cooling surface is intersected with the first cooling surface, and the battery cell can radiate heat through the intersected first cooling surface and the second cooling surface, compared with the prior art, which only radiates heat through one side of the battery cell, the heat radiation efficiency of the battery cell can be improved, the temperature uniformity of the battery cell can be improved, and the service life of the battery cell can be effectively prolonged.

Drawings

Fig. 1 is a front view of a battery assembly according to one embodiment of the present disclosure.

Fig. 2 is a top view of a battery assembly according to one embodiment of the present disclosure.

Reference numerals:

a battery assembly 100;

a battery cell 1; a first heat radiation surface 11; a second radiating surface 12;

a cooling plate 2; a first cooling surface 21; a medium flow passage 22;

a heat pipe 3; a second cooling surface 31; a heat conduction path 32;

a first heat conductive layer 4;

a second heat conductive layer 5.

Detailed Description

Embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, are described in detail below. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present disclosure and are not to be construed as limiting the present disclosure.

As shown in fig. 1 and 2, a battery assembly 100 of an embodiment of the present disclosure includes a battery cell 1, a cooling plate 2, and a heat pipe 3, the battery cell 1 including a first heat radiating surface 11 and a second heat radiating surface 12, the first heat radiating surface 11 intersecting the second heat radiating surface 12. The cooling plate 2 comprises a first cooling surface 21 and the heat pipe 3 comprises a second cooling surface 31, the second cooling surface 31 intersecting the first cooling surface 21. Wherein the first heat radiating surface 11 is in contact with the first cooling surface 21, and the second heat radiating surface 12 is in contact with the second cooling surface 31. At least a part of the second cooling surface 31 is provided at an evaporation section of the heat pipe 3, and a condensation section of the heat pipe 3 is connected to the cooling plate 2.

The first heat radiating surface 11 intersects the second heat radiating surface 12, which can be understood as: the included angle between the first radiating surface 11 and the second radiating surface 12 is an acute angle, an obtuse angle or a right angle. The intersection of the second cooling surface 31 with the first cooling surface 21 can be understood as: the second cooling surface 31 forms an acute, obtuse or right angle with the first cooling surface 21. At least a part of the second cooling surface 31 is arranged at the evaporation section of the heat pipe 3, so that the evaporation section of the heat pipe 3 can absorb heat through the second cooling surface 31, the working medium in the heat pipe 3 is evaporated and gasified, the evaporated and gasified working medium flows to the condensation section connected with the cooling plate 2, and is condensed and liquefied under the cooling action of the cooling plate 2, and the condensed and liquefied working medium flows back into the evaporation section.

According to the battery assembly 100 disclosed by the embodiment of the utility model, the first cooling surface 11 is in contact with the first cooling surface 21, so that heat exchange can be performed between the first cooling surface 11 and the first cooling surface 21, and the cooling plate 2 is used for taking away the heat of the battery core 1, so that the cooling and heat dissipation of the battery core 1 are realized; the second cooling surface 12 is in contact with the second cooling surface 31, so that heat exchange can be performed between the second cooling surface 12 and the second cooling surface 31, and the heat of the battery cell 1 is carried away by the heat pipe 3, so that cooling and heat dissipation of the battery cell 1 are realized.

Because the first cooling surface 11 is intersected with the second cooling surface 12, the second cooling surface 31 is intersected with the first cooling surface 21, so that the battery cell 1 can radiate heat through the intersected first cooling surface 11 and the second cooling surface 12, compared with the prior art that only one side of the battery cell radiates heat, the heat radiation efficiency of the battery cell 1 can be improved, the temperature uniformity of the battery cell 1 can be improved, and the service life of the battery cell can be effectively prolonged.

In addition, due to the physical properties of the working medium in the heat pipe 3, the overall temperature uniformity of the second cooling surface 31 of the heat pipe 3 is better, which is beneficial to further improving the temperature uniformity of the battery cell 1 and prolonging the service life of the battery cell 1.

In order to make the technical solution of the present application easier to understand, the technical solution of the present application will be further described below by taking the first heat dissipating surface 11 and the second heat dissipating surface 12 as an example, where the first heat dissipating surface 11 is perpendicular to the up-down direction and the second heat dissipating surface 12 is parallel to the up-down direction.

For example, as shown in fig. 1 and 2, the bottom surface of the battery cell 1 is a first heat radiation surface 11, and the upper surface of the cooling plate 2 is a first cooling surface 21. The left side surface or the right side surface of the battery core 1 is a second radiating surface 12, and the left side surface and the right side surface of the heat pipe 3 are second cooling surfaces 31. The battery cell 1 contacts with the cooling plate 2 through the bottom surface, so that heat dissipation of the bottom of the battery cell 1 can be effectively realized; the battery cell 1 contacts with the heat pipe 3 through the left side surface or the right side surface, so that not only can the heat dissipation of the battery cell 1 be realized in the up-down direction, but also the temperature uniformity of the battery cell 1 in the up-down direction can be improved.

In some embodiments, the cooling plate 2 includes a medium inlet (not shown), a medium outlet (not shown), and a medium flow passage 22, both of which are in communication with the medium flow passage 22, and at least a portion of the condensing section is disposed inside the medium flow passage 22.

At least a portion of the condensing section is disposed within the media flow path 22, which can be understood as: the condensing section is integrally arranged in the medium flow passage 22; alternatively, a part of the condensing section is provided inside the medium flow path 22, and another part of the condensing section is provided outside the medium flow path 22.

When the battery cell cooling device is particularly used, a cooling medium can be introduced into the medium flow channel 22 through the medium inlet, and the heat of the battery cell 1 is absorbed in the process that the cooling medium flows along the medium flow channel 22; then, the cooling medium flows out from the medium outlet to take away the heat of the battery cell 1, so as to realize cooling and heat dissipation of the battery cell 1. The cooling medium may be cooling water, refrigerant, cooling gas, or the like.

Through locating the inside of medium runner 22 with at least a portion of condensation segment, can utilize the coolant in the medium runner 22, take away the heat of working medium in the condensation segment fast, be favorable to improving cooling radiating efficiency and the temperature homogeneity of electric core 1.

Alternatively, the number of the medium flow passages 22 is plural, and the arrangement direction and the extending direction of the plural medium passages 22 are parallel to the first cooling surface 21.

For example, the plurality of medium flow passages 22 each extend in the front-rear direction, and the plurality of medium flow passages 22 are arranged at intervals in the left-right direction. Of course, the medium flow path 22 may extend in the left-right direction, and the plurality of medium channels 22 may be arranged at intervals in the front-rear direction.

Optionally, a plurality of medium flow channels 22 are uniformly spaced.

For example, the plurality of medium flow passages 22 are uniformly arranged at intervals in the left-right direction.

Alternatively, the heat pipe 3 is a plate-shaped heat pipe, and the heat pipe 3 includes a plurality of heat conducting channels 32, the extending direction of the heat conducting channels 32 is parallel to the second cooling surface 31, and the extending direction of the heat conducting channels 32 intersects the first cooling surface 21.

For example, as shown in fig. 1 and 2, the second cooling surface 31 is perpendicular to the left-right direction, the heat conduction channels 32 extend in the up-down direction, and the plurality of heat conduction channels 32 are arranged at intervals in the front-rear direction.

By setting the heat pipe 3 as a plate-shaped heat pipe, the heat exchange area between the battery cell 1 and the heat pipe 3 is favorably improved, and the heat dissipation efficiency and the temperature uniformity of the battery cell 1 are favorably further improved.

Optionally, a plurality of heat conducting channels 32 are uniformly spaced.

For example, the plurality of heat conduction channels 32 are uniformly arranged at intervals in the front-rear direction.

Optionally, the media flow path 22 and the thermally conductive path 32 are each elongated.

In some embodiments, the number of the battery cells 1 is plural, and the first heat dissipation surfaces 11 of at least two battery cells 1 are in contact with the same first cooling surface 21.

For example, as shown in fig. 2, the number of the battery cells 1 is twelve, and the first heat dissipation surfaces 11 of the twelve battery cells 1 are all in contact with the same first cooling surface 21.

Therefore, the same cooling plate 2 can simultaneously realize cooling and heat dissipation of a plurality of battery cells 1, which is beneficial to simplifying the structure of the battery assembly 100 and reducing the cost of the battery assembly 100.

Optionally, at least one heat pipe 3 is clamped between at least two cells 1.

For example, as shown in fig. 1 and 2, each heat pipe 3 is sandwiched between two cells 1 in the left-right direction.

Therefore, the same heat pipe 3 can simultaneously realize cooling and heat dissipation of a plurality of battery cells 1, which is beneficial to further simplifying the structure of the battery assembly 100 and reducing the cost of the battery assembly 100. In addition, it is advantageous to improve the compactness of the arrangement of the battery cells 1 and to improve the volumetric energy density of the battery assembly 100.

Optionally, the plurality of battery cells 1 form a plurality of battery packs, each battery pack including at least two battery cells 1, the plurality of battery packs being arranged at intervals. The number of the heat pipes 3 is multiple, the heat pipes 3 are in one-to-one correspondence with the battery packs, and each heat pipe 3 is clamped among the battery cells 1 of the corresponding battery pack.

For example, as shown in fig. 2, twelve cells 1 are grouped in pairs, and six battery packs are formed. The number of the heat pipes 3 is six, the six battery packs are in one-to-one correspondence with the six heat pipes 3, and each heat pipe 3 is clamped between the corresponding two battery cells 1 in the left-right direction.

Alternatively, a plurality of battery packs are arranged at intervals in a matrix form.

For example, as shown in fig. 2, a plurality of battery packs are arranged in a matrix form of three rows and two columns.

Thus, the plurality of battery packs are orderly arranged, which is advantageous in improving the integration and assembly efficiency of the battery assembly 100.

Optionally, adjacent battery packs are arranged at intervals. The interval between adjacent battery packs is set up, can be understood as: and a space is arranged between the adjacent battery packs. Therefore, when the battery cell 1 expands due to higher temperature, the interval between the battery packs can reserve enough accommodation space for the expansion of the battery cell 1, so that the battery cell 1 is prevented from being crushed.

In some embodiments, as shown in fig. 1 and 2, the battery assembly 100 further includes a first heat conductive layer 4 and a second heat conductive layer, the first heat conductive layer 4 being sandwiched between the first heat dissipation surface 11 and the first cooling surface 21, and the second heat conductive layer 5 being sandwiched between the second heat dissipation surface 12 and the second cooling surface 31.

Through setting up first heat conduction layer 4 between first cooling surface 11 and first cooling surface 21 for electric core 1 can exchange heat through first heat conduction layer 4 and cooling plate 2, is favorable to not only improving the heat transfer area between electric core 1 and the cooling plate 2, is favorable to reducing the thermal conductivity between electric core 1 and the cooling plate 2 in addition, thereby is favorable to further improving the radiating efficiency of electric core 1. Through setting up second heat conduction layer 5 between second cooling surface 12 and second cooling surface 31 for electric core 1 can exchange heat through second heat conduction layer 5 and heat pipe 3, is favorable to not only improving the heat transfer area between electric core 1 and the heat pipe 3, is favorable to reducing the heat conduction thermal resistance between electric core 1 and the heat pipe 3, thereby is favorable to further improving the radiating efficiency and the temperature homogeneity of electric core 1.

Optionally, the first heat conducting layer 4 is a first heat conducting rubber pad, and the first heat dissipating surface 11 and the first cooling surface 21 are bonded to the first heat conducting rubber pad.

Through establishing first heat conduction layer 4 as first heat conduction cushion, be favorable to further reducing the thermal resistance that conducts between electric core 1 and the cooling plate 2, with electric core 1's heat conduction to cooling plate 2 fast, improve electric core 1's radiating efficiency, improved electric core 1's work efficiency, prolonged electric core 1's life. In addition, the first heat-conducting rubber pad also plays a role in buffering and insulation, and the stability of the battery cell 1 is improved.

Optionally, the second heat conducting layer 5 is a second heat conducting rubber pad, and the second heat dissipating surface 12 and the second cooling surface 31 are both bonded to the second heat conducting rubber pad.

Through establishing second heat conduction layer 5 as the second heat conduction cushion, be favorable to further reducing the thermal resistance that conducts between electric core 1 and the heat pipe 3, with electric core 1's heat conduction to heat pipe 3 fast, improve electric core 1's radiating efficiency, improved electric core 1's work efficiency, prolonged electric core 1's life. In addition, the second heat-conducting rubber pad also plays a role in buffering and insulation, and the stability of the battery cell 1 is improved.

Optionally, the battery cell 1 is a square-shell battery cell, and the first heat dissipation surface 11, the second heat dissipation surface 12, the first cooling surface 21 and the second cooling surface 31 are all plane surfaces.

The shape of the battery cell 1 can increase the heat exchange area between the battery cell 1 and the cooling plate 2 and the heat pipe 3, and further improve the heat dissipation efficiency of the battery cell 1.

Optionally, the thickness of the cooling plate 2 is less than or equal to 2mm, the thickness of the heat pipe 3 is less than or equal to 2mm, the thickness of the first heat conducting layer is less than or equal to 2mm, and the thickness of the second heat conducting layer is less than or equal to 2mm.

Thereby, the structural compactness of the battery assembly 100 is further improved, and the volumetric energy density of the battery assembly 100 is improved.

According to the battery assembly 100 disclosed by the embodiment of the disclosure, the heat pipe 3 is added on the basis of the cooling plate 2, and the battery core 1 can be cooled more rapidly by utilizing the phase-change refrigeration of the heat pipe 3; because the temperature of the working medium is unchanged when the heat pipe 3 is used for phase-change refrigeration, the temperature uniformity of the battery cell 1 can be effectively improved by using the heat pipe 3.

The battery pack according to the embodiments of the present disclosure includes a case and a battery assembly 100, where the battery assembly 100 is the battery assembly 100 according to any one of the embodiments described above, and the battery assembly 100 is disposed in the case.

Since the battery pack 100 has advantages such as long service life, the battery pack of the embodiment of the present disclosure has advantages such as long service life.

The vehicle of the embodiment of the disclosure includes a vehicle body and a battery pack, wherein the battery pack is the battery pack according to any one of the embodiments, and the battery pack is arranged on the vehicle body.

The vehicle can be a pure electric vehicle or an oil-electricity hybrid electric vehicle.

Because the battery pack has advantages such as long service life, therefore, the vehicle of this disclosed embodiment has advantages such as good reliability.

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

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

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

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

In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present disclosure have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present disclosure.

Claims (10)

1. A battery assembly, comprising:

the battery cell comprises a first radiating surface and a second radiating surface, and the first radiating surface is intersected with the second radiating surface;

a cooling plate including a first cooling surface, the first cooling surface being in contact with the first cooling surface; and

a heat pipe including a second cooling surface intersecting the first cooling surface, the second cooling surface being in contact with the second cooling surface;

at least one part of the second cooling surface is arranged at the evaporation section of the heat pipe, and the condensation section of the heat pipe is connected with the cooling plate.

2. The battery assembly of claim 1, wherein the cooling plate includes a media inlet, a media outlet, and a media flow passage, the media inlet and the media outlet each in communication with the media flow passage;

at least a part of the condensing section is arranged in the medium flow passage.

3. The battery module of claim 1, wherein the heat pipe is a plate-shaped heat pipe, the heat pipe includes a plurality of heat conduction channels, an extending direction of the heat conduction channels is parallel to the second cooling surface, and an extending direction of the heat conduction channels intersects the first cooling surface.

4. The battery assembly of claim 1, wherein the battery assembly further comprises:

the first heat conduction layer is clamped between the first radiating surface and the first cooling surface; and

and the second heat conduction layer is clamped between the second radiating surface and the second cooling surface.

5. The battery assembly of claim 4, wherein the first thermally conductive layer is a first thermally conductive pad, the first cooling surface and the first cooling surface both being bonded to the first thermally conductive pad; and/or

The second heat conduction layer is a second heat conduction rubber pad, and the second radiating surface and the second cooling surface are bonded with the second heat conduction rubber pad.

6. The battery assembly of any one of claims 1-5, wherein the number of cells is a plurality, the first cooling surface of at least two of the cells being in contact with the same first cooling surface.

7. The battery assembly of any one of claims 1-5, wherein the number of cells is a plurality, at least one of the heat pipes being sandwiched between the second heat dissipation surfaces of at least two of the cells.

8. The battery assembly of claim 7, wherein a plurality of said cells form a plurality of battery packs, each said battery pack comprising at least two of said cells;

the number of the heat pipes is multiple, the heat pipes are in one-to-one correspondence with the battery packs, and each heat pipe is clamped between the corresponding battery cells of the battery pack.

9. A battery pack, comprising:

a case; and

a battery assembly according to any one of claims 1 to 8, the battery assembly being provided in the case.

10. A vehicle, characterized by comprising:

a vehicle body; and

a battery pack provided to the vehicle body, the battery pack being the battery pack according to claim 9.

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