CN220290953U - Battery pack - Google Patents

Abstract

The embodiment of the application provides a battery pack, and relates to the technical field of batteries. The device comprises a plurality of single batteries and a thermal management component, wherein the plurality of single batteries are arranged into a plurality of single battery groups, and the plurality of single battery groups are arranged at intervals along a second direction; the heat management plate is provided with a heat exchange cavity, and a plurality of heat exchange walls are arranged in the heat exchange cavity; at least one of the heat exchange walls is provided with a buffer bulge, a first connecting end and a second connecting end of the buffer bulge are connected with the same heat exchange wall at intervals, and the heat exchange wall and the buffer bulge form a cavity. The buffer bulge is arranged to form a cavity with the heat exchange wall, when the single battery expands to extrude the heat management plate, the buffer bulge contacts with the opposite side heat exchange wall or deforms with the opposite side buffer bulge, and the cavity provides a certain buffer deformation space, so that the buffer bulge has a certain buffer supporting effect on the heat exchange wall, and the heat management plate is excessively extruded to be damaged when the single battery expands too much.

Description

Battery pack

Technical Field

The embodiment of the application relates to the technical field of batteries, in particular to a battery pack.

Background

The battery pack generally includes a thermal management member and a plurality of unit cells, and the thermal management member is connected with the unit cells to absorb heat generated during operation of the unit cells or to transfer heat to the battery pack when the battery pack is operated in a low temperature environment so that the battery pack operates in a proper temperature range. In the working process of the battery pack, the single battery can expand, and the expansion performance of the single battery can not be well regulated by the existing thermal management component.

Disclosure of Invention

The embodiment of the application provides a battery pack, and the expansion deformation of a single battery is well absorbed, so that the battery electrical property and the service life of the battery pack are improved.

In one aspect, an embodiment of the present application provides a battery pack, including a plurality of unit batteries arranged in a first direction and configured as a plurality of unit battery packs arranged at intervals along a second direction, and a thermal management unit including a thermal management plate and a buffer protrusion, wherein the thermal management plate is disposed between two adjacent unit battery packs and connected with the unit batteries; the heat management plate is provided with a heat exchange cavity, and a plurality of heat exchange walls are arranged in the heat exchange cavity; the buffer bulge is arranged on at least one of the heat exchange walls, the buffer bulge is provided with a first connecting end and a second connecting end which are opposite, the first connecting end and the second connecting end are connected with the same heat exchange wall at intervals, and the heat exchange wall and the buffer bulge enclose a cavity.

In some embodiments, the heat exchange walls include first and second heat exchange walls extending along a length direction of the thermal management plate, the first and second heat exchange walls being disposed opposite along a width direction of the thermal management plate, the buffer protrusion satisfying one of the following conditions:

i) When the buffer protrusion is provided on the first heat exchange wall, the buffer protrusion is configured to be capable of contacting the second heat exchange wall when the thermal management plate is subjected to pressure; the method comprises the steps of carrying out a first treatment on the surface of the

ii) when the buffer protrusion is provided on the second heat exchange wall, the buffer protrusion is configured to be able to contact the first heat exchange wall when the thermal management plate is subjected to pressure;

iii) When the first heat exchange wall and the second heat exchange wall are simultaneously provided with buffer protrusions, the buffer protrusions are configured to be capable of contacting the opposite first heat exchange wall or the second heat exchange wall when the thermal management plate is subjected to pressure;

iii) when the first and second heat exchange walls are simultaneously provided with buffer protrusions, the buffer protrusions of both sides are configured to be able to contact each other when the thermal management plate is subjected to pressure.

In some embodiments, the buffer projection comprises a first buffer projection disposed on a first heat exchange wall and a second buffer projection disposed on the second heat exchange wall, the orthographic projections of the first buffer projection and the second buffer projection on the first heat exchange wall at least partially overlapping.

In some embodiments, the first heat exchange wall is provided with a plurality of first buffer protrusions, a first gap is formed between two adjacent first buffer protrusions, the second heat exchange wall is provided with a plurality of second buffer protrusions arranged at intervals, and the orthographic projection of the second buffer protrusions on the first heat exchange wall at least partially overlaps with the first gap.

In some embodiments, when the thermal management plate is under pressure, one of the first buffer protrusions is simultaneously in contact with two of the second buffer protrusions adjacent thereto, and/or one of the second buffer protrusions is simultaneously in contact with two of the first buffer protrusions adjacent thereto.

In some embodiments, the first buffer protrusions and the second buffer protrusions are disposed opposite to each other in a thickness direction of the thermal management plate, and one of the first buffer protrusions contacts one of the second buffer protrusions opposite thereto when the thermal management plate is pressurized.

In some embodiments, the buffer protrusion includes an elastic wall and connecting walls connected to both ends of the elastic wall, the connecting walls are respectively connected to the first connecting end and the second connecting end, and the elastic wall is elastically deformed when being extruded.

In some embodiments, the elastic wall, the connecting wall, and the heat exchange wall enclose the cavity.

In some embodiments, the elastic wall is arc-shaped in a cross section perpendicular to the cavity direction.

In some embodiments, the connecting wall is perpendicular to the heat exchange wall and/or the connecting wall is tangential to the elastic wall at the junction.

In some embodiments, the thermal management plate comprises an inner plate and an outer plate sleeved outside the inner plate, and the buffer protrusions and the inner plate are integrally formed by elastic materials.

In another aspect, embodiments of the present application provide a battery pack including a plurality of unit cells and the thermal management component, where a thermal management plate of the thermal management component is connected to the unit cells.

The embodiment of the application provides a battery pack, which comprises a plurality of single batteries and a thermal management component, wherein the single batteries are arranged into a plurality of single battery packs, and the single battery packs are arranged at intervals along a second direction; the heat management plate is provided with a heat exchange cavity, and a plurality of heat exchange walls are arranged in the heat exchange cavity; at least one of the heat exchange walls is provided with a buffer bulge, a first connecting end and a second connecting end of the buffer bulge are connected with the same heat exchange wall at intervals, and the heat exchange wall and the buffer bulge form a cavity. The buffer bulge is arranged to form a cavity with the heat exchange wall, when the single battery expands to extrude the heat management plate, the buffer bulge contacts with the opposite side heat exchange wall or deforms with the opposite side buffer bulge, and the cavity provides a certain buffer deformation space, so that the buffer bulge has a certain buffer supporting effect on the heat exchange wall, and the heat management plate is excessively extruded to be damaged when the single battery expands too much.

Drawings

Fig. 1 schematically shows an exploded view of a battery pack;

fig. 2 to 4 schematically show cross-sectional views of the battery pack;

FIG. 5 schematically illustrates a cross-sectional view of a thermal management component;

FIG. 6 is a schematic illustration of the structure of FIG. 5 after deformation;

FIG. 7 schematically illustrates a cross-sectional view of another thermal management component;

FIG. 8 is a schematic illustration of the structure of FIG. 7 after deformation;

FIG. 9 schematically illustrates a cross-sectional view of yet another thermal management component;

FIG. 10 is a schematic illustration of the structure of FIG. 9 after deformation;

FIG. 11 schematically illustrates a cross-sectional view of yet another thermal management component;

FIG. 12 is a schematic view of the structure of FIG. 11 after deformation;

FIG. 13 schematically illustrates a cross-sectional view of yet another thermal management component;

FIG. 14 is a schematic view of the structure of FIG. 13 after deformation;

FIG. 15 schematically illustrates a cross-sectional view of yet another thermal management component;

FIG. 16 is a schematic illustration of the structure of FIG. 15 after deformation;

FIG. 17 schematically illustrates a cross-sectional view of yet another thermal management component;

FIG. 18 is a schematic illustration of the structure of FIG. 17 after deformation;

FIG. 19 schematically illustrates a cross-sectional view of another thermal management component.

Reference numerals:

11-heat exchange walls;

13-connecting ends;

100-thermal management components;

110-a thermal management plate;

110 a-a heat exchange chamber;

110 b-an inner panel;

111 c-outer plates;

111-a first heat exchange wall;

112-a second heat exchange wall;

130-buffer protrusions;

1301-a first buffer projection;

1302-a second buffer bump;

131-an elastic wall;

132-connecting walls;

130 a-a cavity;

200-single battery;

300-communicating pipe.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the embodiments of the present application, the meaning of "a plurality of" means two or more, and the meaning of "at least one" means one or more, unless specifically defined otherwise.

In the embodiments of the present application, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and are not indicative or implying that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.

The embodiment of the application provides a battery pack, which can be applied to a hydroelectric generation system, a thermal power generation system, a wind power generation system and a solar power generation system to store generated electric energy, can also be applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like to provide electric energy for a driving motor, and can also be applied to other scenes.

As shown in fig. 1 to 4, the battery pack includes a plurality of unit cells 200 and a thermal management part 100, and the thermal management part 100 is connected with the unit cells 200 to adjust the temperature of the unit cells 200.

Illustratively, the plurality of unit cells 200 may be arranged in an array, the plurality of unit cells 200 arranged in an array form a plurality of unit cell groups, each unit cell group includes a plurality of unit cells 200, the plurality of unit cells 200 are arranged in a plurality of unit cell groups along the first direction X, and the plurality of unit cell groups are arranged in a plurality of unit cell groups along the second direction Y at intervals. The thermal management assembly 100 is located between two adjacent cell stacks, and the thermal management assembly 100 includes opposite sides in the Y-direction, one of which is connected to a cell 200 in one cell stack and the opposite side is connected to a cell 200 in the other cell stack.

The connection between the thermal management component 100 and the unit cell 200 refers to any matching method in which heat generated by the unit cell 200 can be transferred to the thermal management component 100 through a heat transfer method, and may be direct contact or physical connection between the thermal management component 100 and the unit cell 200, or may be connection between the thermal management component 100 and the unit cell 200 through other heat conducting media, so as to realize heat transfer.

Illustratively, the thermal management component 100 and the single battery 200 are bonded by the heat conductive structural adhesive, so that the heat transfer between the thermal management component 100 and the single battery 200 is realized, and the overall structural strength of the battery pack is improved.

As shown in fig. 5, a heat exchange cavity 110a is provided in the thermal management component 100, and the heat exchange cavity 110a may be filled with a heat exchange medium, through which heat generated during the operation of the unit cell 200 is absorbed or through which heat is provided to the unit cell 200.

For example, with continued reference to fig. 1 to 4, the battery pack is further provided with a communication pipe 300 through which the heat exchange cavities 110a of the plurality of thermal management members 100 communicate such that the heat exchange medium in the heat exchange cavities 110a can flow between the different thermal management members 100 through the communication pipe 300. For example, the battery pack may be further provided with a circulation pump in communication with the communication pipe 300, by which the heat exchange medium is driven to circulate between the respective thermal management members 100. As shown in fig. 5 and 6, the thermal management component 100 includes a thermal management plate 110, the thermal management plate 110 is provided with a heat exchange cavity 110a, the heat exchange cavity 110a is used for introducing a heat exchange medium, the heat exchange cavity 110a is internally provided with a heat exchange wall 11, the heat exchange wall 11 is provided with a buffer protrusion 130, the buffer protrusion 130 is provided with opposite connection ends 13, the connection ends 13 are respectively connected with the heat exchange wall 11, and the heat exchange wall 11 and the buffer protrusion 130 enclose a cavity 130a. The buffer bulge 130 is arranged to form a cavity 130a with the heat exchange wall 11, when the single battery expands to extrude the heat management plate 110, the buffer bulge 130 contacts with the opposite side heat exchange wall 11 or deforms with the opposite side buffer bulge 130, the cavity 130a provides a certain buffer deformation space, has a certain buffer supporting function on the heat exchange wall 11, and reduces the risk of the heat management plate 110 being crushed.

The heat exchange wall 11 includes a first heat exchange wall 111 and a second heat exchange wall 112 disposed opposite to each other. The first heat exchange wall 111 and/or the second heat exchange wall 112 are used to connect with the unit cells 200 to achieve heat transfer between the thermal management plate 110 and the unit cells 200.

Illustratively, the thermal management plate 110 is generally elongated, and the length direction of the thermal management plate 110 is the X direction. When the thermal management plate 110 is not deformed by extrusion, the cross section of the thermal management plate along the direction perpendicular to the X direction is rectangular, and the first heat exchange wall 111 and the second heat exchange wall 112 are positioned on two long sides of the rectangle and extend along the X direction, so that the areas of the first heat exchange wall 111 and the second heat exchange wall 112 can be increased, and the heat exchange capacity of the thermal management plate 110 can be improved. And the first heat exchange wall 111 and the second heat exchange wall 112 are disposed opposite to each other in the width direction of the thermal management plate 110.

The single battery 200 is easy to expand in the working process, and the first heat exchange wall 111 and/or the second heat exchange wall 112 are extruded in the expansion process, so that the volume of the heat exchange cavity 110a is reduced, the flow of the heat exchange medium in the heat exchange cavity 110a is affected, and the heat exchange capability of the thermal management component 100 is reduced.

For example, when the unit cell 200 connected to the first heat exchange wall 111 expands, the first heat exchange wall 111 is pressed, so that the first heat exchange wall 111 is displaced toward the second heat exchange wall 112, and when the unit cell 200 connected to the second heat exchange wall 112 expands, the second heat exchange wall 112 is pressed, so that the second heat exchange wall 112 is displaced toward the first heat exchange wall 111, that is, the first heat exchange wall 111 and the second heat exchange wall 112 are moved toward each other. The smaller the distance between the first heat exchange wall 111 and the second heat exchange wall 112, the smaller the volume of the heat exchange chamber 110a, the smaller the heat exchange medium throughput, and the heat exchange efficiency decreases.

With continued reference to fig. 5 and 6, the thermal management plate 110 is provided with the buffer protrusion 130, and the buffer protrusion 130 is located within the heat exchange cavity 110a, i.e., the buffer protrusion 130 is located between the first heat exchange wall 111 and the second heat exchange wall 112. When the first heat exchange wall 111 and the second heat exchange wall 112 are pressed to move toward each other, the buffer protrusion 130 may prevent the first heat exchange wall 111 and the second heat exchange wall 112 from being attached, thereby preventing the heat exchange chamber 110a from being further reduced in volume.

As shown in fig. 5 and 6, a cavity 130a through which the heat exchange medium flows may be provided in the buffer protrusion 130. Illustratively, the buffer protrusion 130 extends along the X-direction such that it is generally elongated, and the cavity 130a also extends along the X-direction. The cavity 130a is provided in the buffer protrusion 130, so that the heat exchange medium can flow in the cavity 130a, and the influence on the fluidity of the heat exchange medium when the thermal management plate 110 is extruded is reduced.

The buffer protrusion 130 is located in the heat exchange cavity 110a, and when the cavity 130a is provided in the buffer protrusion 130, the cavity 130a is located in the heat exchange cavity 110a, and the heat exchange medium can flow in the cavity 130a. Since the buffer protrusion 130 occupies only a portion of the heat exchange chamber 110a, the heat exchange medium can flow in the space defined by the buffer protrusion 130, the first heat exchange wall 111, and the second heat exchange wall 112.

The buffer protrusion 130 itself may have elasticity. When the unit cell 200 expands and deforms and presses the thermal management plate 110, the buffer protrusion 130 may elastically deform and generate an elastic force, and when the unit cell 200 contracts and removes the pressing of the thermal management plate 110, the elastic force generated by the buffer protrusion 130 may drive the first heat exchange wall 111 and/or the second heat exchange wall 112 to rebound, thereby increasing the volume of the heat exchange cavity 110 a. In addition, when the thermal management plate 110 is pressed, the buffer protrusions 130 may support the first heat exchange wall 111 and the second heat exchange wall 112 to prevent the thermal management plate 110 from being damaged due to excessive deformation. With continued reference to fig. 5, a buffer protrusion 130 may be provided on the first heat exchange wall 111. When the heat management plate 110 is pressurized, the buffer protrusions 130 are in contact with the second heat exchange wall 112.

Illustratively, as shown in fig. 6, the second heat exchange wall 112 is pressed and bent to be deformed toward the first heat exchange wall 111, thereby bringing the second heat exchange wall 111 into contact with the buffer protrusion 130 provided at the first heat exchange wall 111.

As shown in fig. 7, a buffer protrusion 130 may also be provided on the second heat exchange wall 112. When the heat management plate 110 is pressurized, the buffer protrusions 130 are in contact with the first heat exchange wall 111.

Illustratively, as shown in fig. 8, the first heat exchange wall 111 is pressed and bent toward the second heat exchange wall 112, thereby bringing the first heat exchange wall 111 into contact with the buffer protrusion 130 provided at the second heat exchange wall 112.

As shown in fig. 9, the buffer protrusions 130 may also be provided on both the first heat exchange wall 111 and the second heat exchange wall 112. The buffer protrusions provided on the first heat exchange wall 111 are first buffer protrusions 1301, and the buffer protrusions 130 provided on the second heat exchange wall 112 are second buffer protrusions 1302. The first and second buffer protrusions 1301 and 1302 may have the same shape and size or may be different. For convenience of description, the first buffer bump 1301 and the second buffer bump 1302 are illustrated as having the same shape and size in the embodiment of the present application.

When the first heat exchange wall 111 is provided with the first buffer protrusion 1301 and the second heat exchange wall 112 is provided with the second buffer protrusion 1302, the heat management plate 110 may be in contact with the second heat exchange wall 112 and the second buffer protrusion 1302 is in contact with the first heat exchange wall 111 when being under pressure; the first buffer bump 1301 may be in contact with the second buffer bump 1302.

Illustratively, the first buffer protrusion 1301 is in contact with the second buffer protrusion 1302 when the thermal management plate 110 is pressurized when the orthographic projection of the second buffer protrusion 1302 on the first heat exchange wall 111 at least partially overlaps the first buffer protrusion 1301.

Wherein at least partially overlapping includes fully overlapping as well as partially overlapping.

When the orthographic projection of the first heat exchange wall 111 completely overlaps the first buffer projection 1301, the first buffer projection 1301 and the second buffer projection 1302 are disposed opposite to each other in a direction perpendicular to the first heat exchange wall 111 and the second heat exchange wall 112 (i.e., in a thickness direction of the thermal management plate 110).

When the orthographic projection of the first heat exchange wall 111 is partially overlapped with the first buffer protrusion 1301, the first buffer protrusion 1301 and the second buffer protrusion 1302 are arranged in a staggered manner along the direction perpendicular to the first heat exchange wall 111 and the second heat exchange wall 112.

Illustratively, when the orthographic projection of the second buffer protrusion 1302 on the first heat exchange wall 111 does not overlap with the first buffer protrusion 1301, the first buffer protrusion 1301 is in contact with the second heat exchange wall 112 and the second buffer protrusion 1302 is in contact with the first heat exchange wall 111 when the thermal management plate 110 is under pressure.

The case where the first heat exchange wall 111 is provided with the first buffer protrusion 1301 and the second heat exchange wall 112 is provided with the second buffer protrusion 1302 will be described in detail with reference to specific examples.

Example one

As shown in fig. 9, the orthographic projection of the second buffer projection 1302 on the first heat exchange wall 111 completely overlaps the first buffer projection 1301, that is, the first buffer projection 1301 and the second buffer projection 1302 are disposed opposite to each other in a direction perpendicular to the first heat exchange wall 111 and the second heat exchange wall 112.

Illustratively, as shown in fig. 10, the first heat exchange wall 111 is pressed and is bent and deformed toward the second heat exchange wall 112 such that the first buffer protrusion 1301 provided at the first heat exchange wall 111 is displaced toward the second heat exchange wall 112, and the second heat exchange wall 112 is pressed and is bent and deformed toward the first heat exchange wall 111 such that the second buffer protrusion 1302 provided at the second heat exchange wall 112 is displaced toward the first heat exchange wall 111. Since the first and second buffer protrusions 1301 and 1302 are disposed opposite to each other, the first and second buffer protrusions 1301 and 1302 are brought into contact.

The first buffer protrusions 1301 and the second buffer protrusions 1302 generate elastic force when they are in contact, and the elastic force acts on the first heat exchange wall 111 and the second heat exchange wall 112 to prevent the thermal management plate 110 from continuing to be bent and deformed, thereby preventing the thermal management plate 110 from being damaged due to excessive deformation.

Illustratively, the first buffer protrusion 1301 has a circular arc shape in cross section, two ends of the circular arc are connected to the first heat exchange wall 111, and an intermediate region between the two ends is used for contacting the second buffer protrusion 1302. The shape of the second buffer protrusions 1302 may be the same as the first buffer protrusions 1301.

When the cross sections of the first and second buffer protrusions 1301 and 1302 are arc-shaped, that is, the first and second buffer protrusions 1301 and 1302 are arch-bridge-shaped, the first and second buffer protrusions 1301 and 1302 have better resistance to deformation.

The first and second buffer protrusions 1301 and 1302 contact the opposite heat exchange walls, increasing the distance between the first and second heat exchange walls 111 and 112, i.e., increasing the volume of the heat exchange chamber 110a, and improving the heat exchange effect, relative to the buffer protrusions 130 contacting the opposite heat exchange walls.

Example two

As shown in fig. 11, the orthographic projection of the second buffer projection 1302 on the first heat exchange wall 111 completely overlaps the first buffer projection 1301, that is, the first buffer projection 1301 and the second buffer projection 1302 are disposed opposite to each other in a direction perpendicular to the first heat exchange wall 111 and the second heat exchange wall 112.

Illustratively, as shown in fig. 12, the first heat exchange wall 111 is pressed and is bent and deformed toward the second heat exchange wall 112 such that the first buffer protrusion 1301 provided at the first heat exchange wall 111 is displaced toward the second heat exchange wall 112, and the second heat exchange wall 112 is pressed and is bent and deformed toward the first heat exchange wall 111 such that the second buffer protrusion 1302 provided at the second heat exchange wall 112 is displaced toward the first heat exchange wall 111. Since the first and second buffer protrusions 1301 and 1302 are disposed opposite to each other, the first and second buffer protrusions 1301 and 1302 are brought into contact.

Unlike example one, the shapes of the first and second buffer protrusions 1301 and 1302 are different from example one. As shown in fig. 12, the first buffer protrusion 1301 includes an elastic wall 131 and connection walls 132 connected to both ends of the elastic wall 131, one end of the connection wall 132 away from the elastic wall 131 is connected to the first heat exchange wall 111, the elastic wall 131 is elastically deformed when being pressed, and an elastic force is generated by the elastic deformation of the elastic wall 131.

When the first buffer protrusion 1301 includes the elastic wall 131 and the connection wall 132, the elastic wall 131, the connection wall 132, and the first heat exchange wall 111 together enclose the cavity 130a.

Illustratively, the first buffer protrusion 1301 has a U-shaped cross section, two side walls of the U are connecting walls 132, and a bending region of the U is an elastic wall 131.

The cross section of the first buffer protrusion 1301 is in a U shape, so that the connecting wall 132 is perpendicular to the first heat exchange wall 111, when the first buffer protrusion 1301 contacts with the second buffer protrusion 1302, the first buffer protrusion 1301 receives an elastic force in a direction perpendicular to the first heat exchange wall 111, that is, the direction of the elastic force is parallel to the connecting wall 132, so that the connecting wall 132 is not easy to deform under the action of the elastic force, and the supporting effect of the first buffer protrusion 1301 is better. The second buffer projection 1302 is similar in function and will not be described again.

The section of the elastic wall 131 along the y direction may be arc-shaped, which increases the elastic force when the elastic wall 131 elastically deforms, and when the pressure of the heat management plate 110 is removed, the first heat exchange wall 111 and/or the second heat exchange wall 112 are more easily rebounded under the driving of the elastic force. The arc can be a standard arc or a smooth curved surface with a certain radian.

The connecting wall 132 and the elastic wall 131 can be tangent at the connecting position, that is, the connecting wall 132 and the elastic wall 131 smoothly transition at the connecting position, when the buffer bulge 130 is extruded, the connecting position of the connecting wall 132 and the elastic wall 131 is not easy to generate stress concentration, and the service life of the buffer bulge 130 is prolonged.

Example three

As shown in fig. 13, the first heat exchange wall 111 is provided with a plurality of first buffer protrusions 1301, the plurality of first buffer protrusions 1301 are arranged at intervals, and a first gap B is provided between two adjacent first buffer protrusions 1301. The second heat exchange wall 112 is provided with a plurality of second buffer protrusions 1302, and the plurality of second buffer protrusions 1302 are arranged at intervals. The orthographic projection of the second buffer projection 1302 on the first heat exchange wall 111 is located in the first gap B.

Illustratively, as shown in fig. 14, the second heat exchange wall 112 is pressed and bent to be deformed toward the first heat exchange wall 111 such that the second buffer protrusions 1302 provided at the second heat exchange wall 112 are displaced toward the first heat exchange wall 111. Since the orthographic projection of the second buffer projection 1302 on the first heat exchange wall 111 is located in the first gap B, the second buffer projection 1302 is in contact with the first heat exchange wall 111.

Illustratively, a gap is also provided between adjacent two of the second buffer protrusions 1302, the orthographic projection of the first buffer protrusion 1301 on the second heat exchange wall 112 being located in the gap between adjacent two of the second buffer protrusions 1302. The first heat exchange wall 111 is pressed and bent toward the second heat exchange wall 112 such that the first buffer protrusion 1301 provided at the first heat exchange wall 111 is displaced toward the second heat exchange wall 112 and such that the first buffer protrusion 1301 and the second heat exchange wall 112 are brought into contact.

Unlike the first and second examples, when the thermal management plate 110 is pressed, the second buffer protrusions 1302 are in contact with the first heat exchange wall 111, and the second buffer protrusions 1302 are located between adjacent two first buffer protrusions 1301, such that the first buffer protrusions 1301 and the second buffer protrusions 1302 define positions with each other in a direction parallel to the first heat exchange wall 111, thereby preventing the first heat exchange wall 111 and the second heat exchange wall 112 from being misaligned in a direction parallel to the first heat exchange wall 111.

Example four

As shown in fig. 15, the first heat exchange wall 111 is provided with a plurality of first buffer protrusions 1301, the plurality of first buffer protrusions 1301 are arranged at intervals, and a gap is provided between two adjacent first buffer protrusions 1301. The second heat exchange wall 112 is provided with a plurality of second buffer protrusions 1302, and a partial region of the second buffer protrusions 1302 in orthographic projection of the first heat exchange wall 111 is located in a gap between two adjacent first buffer protrusions 1301, and the partial region overlaps with the two adjacent first buffer protrusions 1301.

Illustratively, as shown in fig. 16, the second heat exchange wall 112 is pressed and bent to be deformed toward the first heat exchange wall 111 such that the second buffer protrusions 1302 provided at the second heat exchange wall 112 are displaced toward the first heat exchange wall 111. Since the partial region of the orthographic projection of the second buffer projection 1302 on the first heat exchange wall 111 is located in the gap between the adjacent two first buffer projections 1301, the partial region overlaps the adjacent two first buffer projections 1301 such that the second buffer projection 1302 is in contact with the adjacent two first buffer projections 1301.

The second buffer protrusions 1302 are in contact with the two adjacent first buffer protrusions 1301, so that the second buffer protrusions 1302, the two adjacent first buffer protrusions 1301 and the second heat exchange wall 112 together enclose a space, and the heat exchange medium can flow in the space, thereby increasing the flow space of the heat exchange medium and improving the heat exchange efficiency of the thermal management component 100.

Example five

As shown in fig. 17, the first heat exchange wall 111 is provided with a plurality of first buffer protrusions 1301, the plurality of first buffer protrusions 1301 are arranged at intervals, and a second gap C is provided between two adjacent first buffer protrusions 1301. The second heat exchange wall 112 is provided with a plurality of second buffer protrusions 1302, and the plurality of second buffer protrusions 1302 are arranged at intervals. The orthographic projection of the second buffer projection 1302 on the first heat exchange wall 111 is located in the second gap C.

Illustratively, as shown in fig. 18, the second heat exchange wall 112 is pressed and bent to be deformed toward the first heat exchange wall 111 such that the second buffer protrusions 1302 provided at the second heat exchange wall 112 are displaced toward the first heat exchange wall 111. Since the orthographic projection of the second buffer projection 1302 on the first heat exchange wall 111 is located in the second gap C, the second buffer projection 1302 is in contact with the first heat exchange wall 111.

Illustratively, as shown in fig. 18, the first heat exchange wall 111 is pressed and bent to be deformed toward the second heat exchange wall 112 such that the first buffer protrusion 1301 provided at the first heat exchange wall 111 is displaced toward the second heat exchange wall 112. Since the orthographic projection of the first buffer projection 1301 on the second heat exchange wall 112 is located in the second gap C, the first buffer projection 1302 is in contact with the second heat exchange wall 111.

Unlike example three, as shown in fig. 18, when the first buffer protrusion 1302 and the second heat exchange wall 111 are in contact and the second buffer protrusion 1302 and the first heat exchange wall 111 are in contact, a gap is formed between the adjacent first buffer protrusion 1301 and second buffer protrusion 1302, so that the heat exchange medium can flow in the gap, the flow path of the heat exchange medium is increased, and the heat exchange efficiency of the thermal management member 100 is improved.

As shown in fig. 19, the thermal management plate 110 may include an inner plate 110b and an outer plate 111c sleeved outside the inner plate 110b, and the buffer protrusions 130 and the inner plate 110b are integrally formed of an elastic material. The thermal management plate 110 includes an inner plate 110b and an outer plate 111c that are sleeved, reducing the difficulty of processing the buffer protrusions 130.

Illustratively, the buffer protrusion 130 and the inner plate 110b are made of rubber, and are integrally formed through an injection molding process. The outer plate 111c is made of metal and is formed by an extrusion process. After the preparation of the inner plate 110b and the outer plate 111c is completed, the inner plate 110b and the buffer protrusions 130 are sleeved inside the outer plate 111 c. In the embodiment of the present application, the materials of the inner plate 110b, the outer plate 111c and the buffer bump 130 are not limited, so long as the inner plate 110b and the outer plate 111c have better thermal conductivity, and the buffer bump 130 has elasticity.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (12)

1. A battery pack, characterized by comprising a plurality of single cells (200) and a thermal management component (100), wherein the plurality of single cells (200) are arranged in a first direction (X) to form a plurality of single cell groups, the plurality of single cell groups are arranged in a second direction (Y) at intervals, the thermal management component (100) comprises a thermal management plate (110) and a buffer protrusion (130), and the thermal management plate (110) is arranged between two adjacent single cell groups and is connected with the single cells (200);

the heat management plate (110) is provided with a heat exchange cavity (110 a), and a plurality of heat exchange walls (11) are arranged in the heat exchange cavity (110 a);

the buffer bulge (130) is arranged on at least one of the heat exchange walls (11), the buffer bulge (130) is provided with a first connecting end (133) and a second connecting end (134) which are opposite, the first connecting end (133) and the second connecting end (134) are connected with the same heat exchange wall (11) at intervals, and the heat exchange wall (11) and the buffer bulge (130) form a cavity (130 a) in a surrounding mode.

2. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,

the heat exchange wall (11) comprises a first heat exchange wall (111) and a second heat exchange wall (112) extending along the length direction of the heat management plate (110), the first heat exchange wall (111) and the second heat exchange wall (112) are oppositely arranged in the width direction of the heat management plate (110), and the buffer protrusion (130) meets one of the following conditions:

i) When the buffer protrusion (130) is provided on the first heat exchange wall (111), the buffer protrusion (130) is configured to be capable of contacting the second heat exchange wall (112) when the thermal management plate (110) is subjected to pressure;

ii) when the buffer protrusion (130) is provided on the second heat exchange wall (112), the buffer protrusion (130) is configured to be able to contact the first heat exchange wall (111) when the thermal management plate (110) is subjected to pressure;

iii) When the first heat exchange wall (111) and the second heat exchange wall (112) are simultaneously provided with a buffer protrusion (130), the buffer protrusion (130) is configured to be capable of contacting with the opposite first heat exchange wall (111) or the second heat exchange wall (112) when the thermal management plate (110) is subjected to pressure;

iii) when the first heat exchange wall (111) and the second heat exchange wall (112) are simultaneously provided with buffer protrusions (130), the buffer protrusions (130) of both sides are configured to be able to contact each other when the thermal management plate (110) is subjected to pressure.

3. The battery pack according to claim 2, wherein the buffer protrusion (130) comprises a first buffer protrusion (1301) provided on the first heat exchange wall (111) and a second buffer protrusion (1302) provided on the second heat exchange wall (112), the orthographic projections of the first buffer protrusion (1301) and the second buffer protrusion (1302) at the first heat exchange wall (111) at least partially overlap.

4. A battery pack according to claim 3, wherein the first heat exchange wall (111) is provided with a plurality of first buffer protrusions (1301), a first gap (B) is provided between two adjacent first buffer protrusions (1301), a plurality of second buffer protrusions (1302) are arranged on the second heat exchange wall (112) at intervals, and the orthographic projection of the second buffer protrusions (1302) on the first heat exchange wall (111) at least partially overlaps with the first gap (B).

5. The battery pack according to claim 4, wherein one of the first buffer protrusions (1301) is simultaneously contacted with two of the second buffer protrusions (1302) adjacent thereto and/or one of the second buffer protrusions (1302) is simultaneously contacted with two of the first buffer protrusions (1301) adjacent thereto when the thermal management plate (110) is subjected to pressure.

6. A battery pack according to claim 3, wherein first buffer protrusions (1301) and second buffer protrusions (1302) are provided opposite to each other in a thickness direction of the thermal management plate (110), and one of the first buffer protrusions (1301) is in contact with one of the second buffer protrusions (1302) opposite thereto when the thermal management plate (110) is subjected to pressure.

7. The battery pack according to claim 1, wherein the buffer protrusion (130) includes an elastic wall (131) and connection walls (132) connected to both ends of the elastic wall (131), the connection walls (132) being connected to the first connection end (133) and the second connection end (134), respectively, and the elastic wall (131) being elastically deformed when being pressed.

8. The battery pack according to claim 7, wherein the elastic wall (131), the connecting wall (132) and the heat exchanging wall (11) enclose the cavity (130 a).

9. The battery pack according to claim 8, wherein the elastic wall (131) has an arc shape in a cross section perpendicular to the cavity (130 a).

10. The battery pack according to claim 9, wherein the connecting wall (132) is perpendicular to the heat exchange wall (11) and/or the connecting wall (132) is tangential to the elastic wall (131) at the junction.

11. The battery pack according to claim 1, wherein the heat exchange chamber (110 a) is for the passage of a heat exchange medium.

12. The battery pack according to any one of claims 1 to 11, wherein the thermal management plate (110) includes an inner plate (110 b) and an outer plate (111 c) that is sleeved outside the inner plate (110 b), and the buffer protrusion (130) and the inner plate (110 b) are integrally formed of an elastic material.