CN220172217U - Battery pack heat insulating plate, battery pack and vehicle - Google Patents

Abstract

The present disclosure relates to a battery pack heat insulating plate, a battery pack, and a vehicle, wherein the battery pack heat insulating plate includes a plate body having a first region and a second region and formed with a first chamber, the second region being located outside the first region, the first chamber being formed in the second region and configured as a vacuum chamber. Through the technical scheme, the heat preservation capability of the battery pack can be improved, and the performance of the vehicle in a low-temperature environment is improved.

Description

Battery pack heat insulating plate, battery pack and vehicle

Technical Field

The present disclosure relates to the field of battery pack insulation, and in particular, to a battery pack insulation board, a battery pack, and a vehicle.

Background

After the vehicle is parked for a long time in a low-temperature environment, the temperature of the battery pack can be reduced to be close to the ambient temperature, and before the vehicle is started by a driver, the temperature of the battery pack needs to be raised to a proper working temperature, but the electric quantity of the battery pack can be consumed by the temperature rise, the heat preservation capacity of the battery pack is poor, the battery pack temperature is reduced to enable the endurance to be attenuated in the low-temperature environment, and meanwhile, the charging power is reduced and the charging time is increased.

Disclosure of Invention

The utility model aims at providing a battery package heat insulating board, battery package and vehicle, can improve the heat preservation ability of battery package, promote the performance of vehicle in low temperature environment.

In order to achieve the above object, the present disclosure provides a battery pack heat insulating plate including a plate body having a first region and a second region and formed with a first chamber, the second region being located outside the first region, the first chamber being formed at the second region and configured as a vacuum chamber.

Optionally, the second region is disposed around the first region; alternatively, two second areas are provided and are arranged side by side with the first area, and the two second areas are located on two sides of the first area.

Optionally, the first chamber includes a plurality of first subchambers, the plate body is provided with an opening for evacuating the first chamber, the plurality of first subchambers are communicated with each other, and the opening is communicated with one of the plurality of first subchambers; or the first subchambers are separated from each other, and the number of the openings is a plurality of and is respectively in one-to-one correspondence with and communicated with the first subchambers.

Optionally, a plurality of the first sub-chambers are in communication with each other, and the plurality of first sub-chambers form a tortuous path.

Optionally, the plate body is formed with a second chamber formed in the first region and isolated from the first chamber.

Optionally, the projected area of the second chamber on the plate body is smaller than the projected area of the first chamber on the plate body.

Optionally, the second chamber includes a plurality of second sub-chambers, and the plurality of second sub-chambers are isolated from each other or are communicated with each other.

Optionally, the second chamber is configured as a vacuum chamber, and the second chamber has a vacuum level that is less than the vacuum level of the first chamber.

Optionally, the plate body comprises a first plate layer and a second plate layer, at least one of the first plate layer and the second plate layer being provided with a second groove in the first region, the first plate layer and the second plate layer being arranged in a stack and fixedly connected to form the second chamber.

Optionally, the plate body comprises a first plate layer and a second plate layer, at least one of the first plate layer and the second plate layer being provided with a first groove in the second region, the first plate layer and the second plate layer being arranged in a stack and fixedly connected to form the first chamber.

Optionally, the second region surrounds the first region, the number of the first grooves is plural, and the plural first grooves are connected to form a tortuous groove structure.

Optionally, the battery pack insulating panel further comprises a reinforcing structure.

Optionally, the reinforcing structure includes a plurality of reinforcing plates, and a plurality of reinforcing plates are fixedly connected to the plate main body through fasteners, or the reinforcing structure includes a plurality of reinforcing ribs, and a plurality of reinforcing ribs and the plate main body are integrally formed.

On the basis of the scheme, the battery pack comprises a tray and a battery cell group, wherein the battery cell group is fixedly installed in the tray, the battery pack further comprises the battery pack heat insulation plate, and the battery pack heat insulation plate is fixedly connected with the tray and used for restraining the battery cell group.

Optionally, the battery cell group includes a plurality of battery cells, the battery pack thermal insulation board further includes a reinforcing structure, the reinforcing structure is fixedly connected to the board main body and is configured as a reinforcing plate or a reinforcing rib, and the reinforcing plate or the reinforcing rib extends along a direction perpendicular to a length direction of the battery cells.

On the basis of the scheme, the disclosure also provides a vehicle which comprises the battery pack.

Through the technical scheme, the heat dissipation conditions of the electric core in different areas in the battery pack are different, wherein the heat dissipation of the part of the electric core, which is close to the edge side beam of the tray, is faster, and the heat dissipation of the part of the electric core, which is close to the center of the battery pack, is slower, so that the temperature difference of the different areas in the battery pack is larger, and an area (the area, which is close to the edge side beam of the tray, in the battery pack) with the faster heat dissipation of the electric core and an area (the area, which is around the center inside the battery pack) with the slower heat dissipation of the electric core are formed in the battery pack. The battery pack heat insulation plate is arranged on the tray and is tightly attached to the battery cell, the second area of the plate main body is located on the outer side of the first area, namely, the second area coincides with the area of the battery pack, in which the heat dissipation of the battery cell is fast, and the first cavity formed in the second area is configured into a vacuum cavity.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is an exemplary structural schematic of a panel body of a battery pack insulating panel according to an embodiment of the present disclosure;

FIG. 2 is a schematic distribution diagram of a first region and a second region of an embodiment of the present disclosure;

FIG. 3 is an exploded view of a panel body of an embodiment of the present disclosure;

FIG. 4 is an exploded view of another plate body of an embodiment of the present disclosure;

FIG. 5 is an exploded view of a battery pack insulating panel according to an embodiment of the present disclosure;

fig. 6 is an exploded view of a battery pack of an embodiment of the present disclosure.

Description of the reference numerals

1-a plate body; 11-a first chamber; 111-a first subchamber; 12-perforating; 13-a second chamber; 131-a second subchamber; 14-a first ply; 15-a second ply; 16-a first groove; 17-a second groove; 2-a first region; 3-a second region; 4-reinforcing structure; 5-a tray; 6-cell group; 61-cell.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise stated, the use of the azimuth term "up and down" refers to the "up and down" of the corresponding parts in opposition to each other in the direction of gravity in the use state. The "inner and outer" are "inner and outer" with respect to the outline of the corresponding component itself. Furthermore, terms such as "first," "second," and the like, as used in this disclosure, are used for distinguishing one element from another and not necessarily for order or importance. In the following description, when referring to the drawings, the same reference numerals in different drawings denote the same or similar elements unless otherwise explained. The foregoing definitions are provided for the purpose of illustrating and explaining the present disclosure and should not be construed as limiting the present disclosure.

According to an embodiment provided by the present disclosure, referring to fig. 1 to 4, the present disclosure provides a battery pack heat insulation board, which includes a board body 1, the board body 1 being formed with a first chamber 11 and having a first region 2 and a second region 3, the second region 3 being located outside the first region 2, the first chamber 11 being formed at the second region 3 and configured as a vacuum chamber.

Through the above technical scheme, the heat dissipation conditions of the battery cells 61 in different areas in the battery pack are different, wherein the heat dissipation of the part of the battery cells 61 close to the edge side beams of the tray 5 (the side beams around the tray 5) is faster, and the heat dissipation of the part of the battery cells 61 close to the center of the battery pack is slower, so that the temperature difference of the different areas in the battery pack is larger, and an area with the faster heat dissipation of the battery cells 61 (the area close to the edge side beams of the tray 5 in the battery pack) and an area with the slower heat dissipation of the battery cells 61 (the area around the center of the inside of the battery pack) are formed in the battery pack. The battery core 61 pulling plate disclosed by the utility model is arranged on the tray 5 and is tightly attached to the battery core 61, the second area 3 of the plate main body 1 is positioned at the outer side of the first area, namely, the second area 3 is overlapped with the area of the battery core 61 in the battery pack, which is faster in heat dissipation, and the first cavity 11 formed in the second area 3 is constructed as a vacuum cavity, so that the heat dissipation of the battery core 61 close to the side beam part of the tray 5 can be reduced through the vacuum of the first cavity 11 due to weak vacuum heat transfer capability, the edge area in the battery pack is subjected to targeted heat preservation while the battery core 61 is restrained, the heat preservation capability of the battery pack is improved, the performance of a vehicle in a low-temperature environment is improved, meanwhile, the temperature difference range of different areas of the battery core 61 in the battery pack is reduced, and the usable power and the service life of the battery core 61 are improved.

It will be appreciated that the area of the heat-insulating plate of the battery pack of the present disclosure is adapted to the arrangement area of the cells 61 in the battery pack, that is, the edge area of the plate body 1 coincides with the edge area of the arrangement area (area composed of the plurality of cell groups 6) of the cells 61 in the battery pack, and the central area of the heat-insulating plate of the battery pack coincides with the central area of the arrangement area of the cells 61 in the battery pack. The central area of the battery pack heat insulation plate refers to an area which diverges outwards from the center of the battery pack heat insulation plate by a certain distance, and the area outside the central area is an edge area, wherein the central area of the battery pack heat insulation plate is correspondingly arranged above the area with slower heat dissipation of the battery cell 61 in the battery pack, and the edge area of the battery pack heat insulation plate is correspondingly arranged above the area with faster heat dissipation of the battery cell 61 in the battery pack.

It should be noted that the second area 3 may be located outside the first area 2, where the first area 2 coincides with a central area of the board main body 1 (an area with slow heat dissipation in the battery pack), and the second area 3 coincides with at least a part of an edge area of the board main body 1 (an area with fast heat dissipation in the battery pack), where the second area 3 completely coincides with an edge area of the board main body 1, or the second area 3 only coincides with a part of an edge area of the board main body 1, and it is understood that the second area 3 located outside the first area 2 only coincides with a part of an edge area of the board main body 1, so that the first chamber 11 configured as a vacuum chamber can reduce heat dissipation of a part of the battery cells 61 near the edge area, so that the effect of targeted heat preservation of the disclosure can be achieved.

There are many different situations in which the distribution of the first region 2 and the second region 3 is possible, and the disclosure herein provides two exemplary embodiments.

In one embodiment provided by the present disclosure, referring to fig. 2, the second region 3 may surround the first region 2. That is, the second region 3 completely coincides with the edge region of the plate body 1, and when the battery pack heat insulating plate of the present disclosure is disposed on the battery cell 61, the second region 3 completely coincides with the edge region of the battery pack where heat dissipation is faster. In order to make the heat preservation effect better, the whole area of the second area 3 can be provided with the first chamber 11, namely, the heat preservation is performed on all edge areas in the battery pack through the first chamber 11 in vacuum, so that the heat dissipation of the edge areas of the arrangement area of the battery core 61 is reduced. Of course, the first chamber 11 may be disposed in a specific manner at a local position of the second region 3 according to a specific heat dissipation condition of the region where the battery cell 61 is disposed in the battery pack.

In another embodiment provided by the present disclosure, referring to fig. 4, the second areas 3 are provided with two and are arranged side by side with the first areas 2, the two second areas 3 being located at both sides of the first areas 2. That is, the first region 2 is a central region of the plate body and includes a central region of the plate body 1, two sides of the first region 2 are respectively provided with a second region 3, and the second regions 3 located at two sides are overlapped with at least a part of edge regions of the plate body 1. Similarly, the whole second area 3 may be provided with the first chamber 11, or the first chamber 11 may be provided in the second area 3 in a targeted manner according to the heat dissipation condition.

With respect to the structure of the first chamber 11, in other embodiments, the entire area of the second region 3 may be provided with the first chamber 11, and in embodiments provided by the present disclosure, the first chamber 11 may include a plurality of first sub-chambers 111 as shown with reference to fig. 3 and 4. In order to vacuumize the first chamber 11, the plate main body 1 may be provided with an opening 12, vacuumize the first chamber 11 or the plurality of first subchambers 111 through the opening 12, and after vacuuming is completed, plug the opening 12 (may be a mechanical plug or an adhesive foreign object plug). The openings 12 may be disposed corresponding to the distribution of the first chamber 11 or the first sub-chamber 111.

Wherein when the second region 3 is arranged around the first region 2, the plurality of first sub-chambers 111 may communicate with each other, and referring to fig. 3, the opening 12 communicates with one of the plurality of first sub-chambers 111, in this embodiment, only one opening 12 is needed to evacuate the entire first chamber 11, since the plurality of first sub-chambers 111 communicate with each other. In other embodiments, the plurality of first sub-chambers 111 may not be in communication, in which case, the plurality of openings 12 need to be provided corresponding to different first sub-chambers 111, respectively, so as to evacuate the plurality of first sub-chambers 111, respectively.

When the second area 3 is provided with two first sub-chambers 111 and located at two sides of the first area 2, the plurality of first sub-chambers 111 may be isolated from each other, and referring to fig. 4, the number of the openings 12 is plural and corresponds to and communicates with the plurality of first sub-chambers 111 one by one. That is, one opening 12 corresponds to one first sub-chamber 111, the plurality of openings 12 are used for vacuumizing the plurality of first sub-chambers 111 respectively, and after vacuumizing is finished, the plurality of openings 12 are plugged uniformly or one by one. In other embodiments, the first sub-chambers 111 of each side of the second area 3 may also be mutually communicated, and only one opening 12 is required to be arranged on each side of the plate main body 1, so that vacuum can be pumped to the first chambers 11 on each side.

In order to reduce the possibility that the plate body 1 is partially crushed in the case where the first sub-chambers 111 communicate with each other, in the embodiment provided in the present disclosure, referring to fig. 3, a plurality of first sub-chambers 111 communicate with each other, and the plurality of first sub-chambers 111 form a tortuous path. In this embodiment, the area of the second area 3 where the first subchamber 111 is not disposed can play a role of supporting, so as to enhance the supporting property of the two side surfaces of the plate body 1 and reduce the possibility of sagging and deforming the two side surfaces of the plate body 1. The first sub-chambers 111 may be connected and communicated end to form a partial or complete "S" shape, a serpentine shape, or other tortuous shape. In the embodiment shown in fig. 3, a plurality of first sub-chambers 111 form a tortuous path which is arranged around the first region 2.

Regarding the first region 2, when the battery pack insulating board of the present disclosure is mounted on the tray 5, the first region 2 of the board body 1 is a portion that coincides with at least the central region of the region where the battery cells 61 are disposed, and the central region of the region where the battery cells 61 are disposed has a slower heat dissipation speed, so that the heat retaining ability required for the structure of the first region 2 is not high (or the heat retaining ability required for the first region 2 is not high as compared to the second region 3), and in order to make the temperature difference of different regions within the battery pack small, the structure of the board body 1 at the first region 2 cannot have even a higher heat retaining ability in some cases.

In other embodiments, the first region 2 may be of solid construction, i.e. the plate body 1 may be of plate construction in the first region 2. In the specific embodiment provided in the present disclosure, referring to fig. 3, the plate body 1 is formed with a second chamber 13, and the second chamber 13 is formed in the first region 2 and is isolated from the first chamber 11. The second chamber 13 may be configured as an air chamber, or the second chamber 13 may be filled with the material of the plate body 1.

Since the insulation board of the battery pack of the present disclosure is mainly used for targeted insulation of the battery cells 61 in the battery pack, and the area of the battery pack with faster heat dissipation is more, in the embodiment provided by the present disclosure, as shown in fig. 3, the projected area of the second chamber 13 on the board body 1 is smaller than the projected area of the first chamber 11 on the board body 1. Through above-mentioned design, can be better carry out effectual heat preservation to the region that battery package heat insulating board heat dissipation is fast. It should be noted that, the projection area on the plate body 1 refers to an area projected on a plate surface on one side of the plate body 1, that is, the second chamber 13 and the first chamber 11 are projected on the same plate surface of the plate body 1, so as to determine the size of the projected areas, where the projection direction may be a direction perpendicular to the drawing plane of fig. 2.

Also, in the embodiment provided in the present disclosure, referring to fig. 3, the second chamber 13 may include a plurality of second sub-chambers 131, the plurality of second sub-chambers 131 may be isolated from each other, and the plurality of second sub-chambers 131 may be communicated with each other. Wherein the area of the second chamber 13 is smaller than the area of the first chamber 11, i.e. the sum of the areas of the plurality of second sub-chambers 131 is smaller than the sum of the areas of the plurality of first sub-chambers 111. The second chamber 13 is divided into a plurality of second sub-chambers 131 such that a support structure (e.g., a support rib shown in fig. 3) is formed between any adjacent two of the second sub-chambers 131, and by the provision of the support structure, the support of the plate body 1 at the first region 2 can be improved, and the possibility of sagging of the first region 2 of the plate body 1 can be reduced.

In some embodiments, the second chamber 13 may also be configured as a vacuum chamber, and the second chamber 13 has a vacuum degree smaller than that of the first chamber 11. For example, the vacuum degree of the first chamber 11 may be required to be greater than 90Kpa, and the vacuum degree of the second chamber 13 may be set according to actual requirements. Since the heat dissipation speed of the area where the battery core 61 is disposed is gradually increased from inside to outside, in other embodiments, the vacuum level of the first sub-chamber 111 near the outside may be increased, the vacuum level of the first sub-chamber 111 near the inside may be decreased, and similarly, the vacuum level of the second sub-chamber 131 near the outside may be close to the vacuum level of the first sub-chamber 111 near the inside, and the vacuum level of the second sub-chamber 131 near the inside may be lower than the vacuum level of the second sub-chamber 131 near the outside, that is, the vacuum level may be gradually decreased from outside to inside.

In other embodiments, the plate body 1 may be integrally molded or integrally extruded, and the plate body 1 may be made of a plastic material with a low thermal conductivity (< 0.2W/(m ℃). In the specific embodiment provided in the present disclosure, referring to fig. 1 to 3, the plate body 1 may include a first plate layer 14 and a second plate layer 15, at least one of the first plate layer 14 and the second plate layer 15 being provided with a second groove 17 in the first region 2, the first plate layer 14 and the second plate layer 15 being stacked and fixedly connected to form the second chamber 13.

In the above embodiment, the panel body 1 may be a composite panel sandwich of upper and lower layers, and the materials of the first and second panel layers 14 and 15 may be composite materials, such as: fiber resin, PP glass fiber and the like, wherein the first plate layer 14 and the second plate layer 15 can be bonded together through structural adhesive, or bonded together through hot pressing, SMC, PCM, RTM and other technological modes, and meanwhile, the tensile shear strength after bonding is required to be more than or equal to 3.0Mpa. When the second chamber 13 includes a plurality of second sub-chambers 131, the number of the second grooves 17 is correspondingly set to be plural, so as to correspondingly form a plurality of second sub-chambers 131.

Also, in the specific embodiment provided in the present disclosure, as shown in fig. 1 to 3, when the plate body 1 includes the first plate layer 14 and the second plate layer 15, at least one of the first plate layer 14 and the second plate layer 15 is provided with the first groove 16 in the second region 3, and the first plate layer 14 and the second plate layer 15 are stacked and fixedly connected to form the first chamber 11. The second area 3 may be disposed around the first area 2, and the number of the first grooves 16 may be plural, so as to form plural first sub-chambers 111 correspondingly, and the plural first grooves 16 are connected to form a tortuous groove structure, so as to form a tortuous first chamber 11 correspondingly, where the tortuous groove structure formed by connecting plural first grooves 16 end to end may be disposed around all the second sub-chambers 131.

It will be appreciated that the first grooves 16 and the second grooves 17 may be provided on either the first ply 14 or the second ply 15, or both the first grooves 16 and the second grooves 17 may be provided on both the first ply 14 and the second ply 15, although it is also possible that one of the first ply 14 and the second ply 15 is provided with the first grooves 16 and the other is provided with the second grooves 17. Wherein, the part between the grooves (including the first groove 16 and the second groove 17) which is not provided with the grooves forms a supporting structure to support the inside of the plate main body 1, thereby reducing the possibility of the two side plate surfaces of the plate main body 1 sinking.

In addition, in the embodiment provided in the present disclosure, referring to fig. 5, the battery pack insulating plate further includes a reinforcing structure 4. The reinforcing structure 4 is used for reinforcing the plate main body 1, and reduces the possibility of bending the plate main body 1 when restraining the battery cell group 6. In some embodiments, the reinforcing structure 4 may be an integrally formed structure with the plate body 1, or may be a structure that is fixed with the plate body 1 after post-production to perform a reinforcing function, and in two exemplary embodiments, the disclosure is provided herein.

In one embodiment provided by the present disclosure, referring to fig. 5, the reinforcing structure 4 may include a plurality of reinforcing plates fixedly coupled to the plate body 1 by fasteners. It should be noted that the reinforcing plate may be a metal strip, or a structural plate, and the fastener may include structural glue, bolts, and the like. Wherein, a plurality of reinforcing plates may be arranged in a direction perpendicular to the length direction of the plate body 1 and fixed on one side plate surface of the plate body 1, that is, may be fixed on the first plate layer 14 or the second plate layer 15.

In another embodiment provided by the present disclosure, referring to fig. 5, the reinforcing structure 4 may also include a plurality of reinforcing ribs integrally formed with the plate body 1. It will be appreciated that if the plate body 1 includes the first plate layer 14 and the second plate layer 15, the first plate layer 14 may be integrally formed with the reinforcing ribs, the second plate layer 15 may be integrally formed with the reinforcing ribs, or the first plate layer 14 and the second plate layer 15 may be integrally formed with the reinforcing ribs. If the plate body 1 is an integrally molded part, the reinforcing ribs may be molded on both side plate surfaces or one side plate surface of the plate body 1.

On the basis of the scheme, the disclosure further provides a battery pack, and referring to fig. 6, the battery pack comprises a tray 5 and a battery cell group 6, the battery cell group 6 is fixedly installed in the tray 5, the battery pack further comprises the battery pack heat insulation plate, and the battery pack heat insulation plate is fixedly connected with the tray 5 and used for restraining the battery cell group 6. The battery pack heat insulation plate has a specific heat insulation function on the battery cells 61 in the battery pack while restraining the battery pack 6, so that the temperature difference amplitude of different areas in the battery pack is reduced.

In installing the battery pack heat insulating plate, in the embodiment provided in the present disclosure, referring to fig. 6, the battery cell group 6 includes a plurality of battery cells 61, and the battery pack heat insulating plate further includes a reinforcing structure 4, the reinforcing structure 4 being fixedly installed to the plate body 1 and configured as a reinforcing plate or a reinforcing rib extending in a direction perpendicular to the length direction of the battery cells 61. The extending direction of the reinforcing structure 4 can better restrict the battery core 61, so as to reduce the degree of extrusion deformation of the plate main body 1 in the expansion or contraction process of the battery core 61.

Taking the reinforcing structure 4 as an example, the reinforcing plates can be bonded on the plate main body 1 one by one, and then the whole battery pack heat insulation plate is fixed on the tray 5 in a screw connection or riveting mode, and the plurality of battery cell groups 6 are located below the battery pack heat insulation plate, wherein fig. 6 is an exploded view of the battery cell groups 6, the plate main body 1 and the reinforcing structure 4. In addition, through holes may be formed in the plate main body 1 and the reinforcing structure 4 so that screws or rivets may pass through, for example, through holes may be formed in both ends of each reinforcing plate, and the through holes in both ends of the reinforcing plate correspond to the through holes in the plate main body 1, and the screws or rivets pass through the through holes in the reinforcing plate and then pass through holes in the plate main body 1, and then are fixedly connected with the tray 5, so that the connection between the reinforcing structure 4 and the plate main body 1 is fastened while the fixing of the battery pack insulating plate is achieved.

On the basis of the scheme, the disclosure also provides a vehicle which comprises the battery pack. The battery pack heat insulation plate is arranged in the battery pack, so that the heat insulation capacity of the battery pack is improved, and the performance of a vehicle in a low-temperature environment is improved.

The specific implementation principle of the embodiment of the disclosure is that the battery pack heat insulation board is arranged above the battery cell groups 6 and is used for restraining the battery cell groups 6, the second area 3 of the battery pack heat insulation board is provided with the first chamber 11 which is constructed as a vacuum chamber, the edge area with the fast heat dissipation in the battery pack is insulated through the vacuum of the first chamber 11, and the first area 2 with the low heat insulation capability is arranged above the central area with the slow heat dissipation in the battery pack, so that the battery cell 61 in the battery pack is subjected to targeted heat insulation, the heat insulation capability of the battery pack is improved, the performance of a vehicle in a low-temperature environment is improved, meanwhile, the temperature difference range of different areas in the battery pack is reduced, and the usable electric quantity and the service life of the battery cell 61 are improved.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure. In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (16)

1. A battery pack heat insulating plate, characterized in that the battery pack heat insulating plate comprises a plate body having a first region and a second region and formed with a first chamber, the second region being located outside the first region, the first chamber being formed in the second region and configured as a vacuum chamber.

2. The battery pack insulating panel of claim 1, wherein the second region is disposed about the first region; or,

the second areas are arranged in parallel with the first areas, and the two second areas are positioned on two sides of the first area.

3. The battery pack insulating panel of claim 2, wherein the first chamber comprises a plurality of first subchambers, the panel body is provided with openings for evacuating the first chamber,

a plurality of said first subchambers communicating with each other, said aperture communicating with one of said plurality of first subchambers; or the first subchambers are separated from each other, and the number of the openings is a plurality of and is respectively in one-to-one correspondence with and communicated with the first subchambers.

4. A battery pack insulating panel as claimed in claim 3 wherein a plurality of said first subchambers are in communication with each other and form a tortuous path.

5. The battery pack insulating panel of any one of claims 1-4, wherein the panel body is formed with a second cavity formed in the first region and isolated from the first cavity.

6. The battery pack insulating panel of claim 5, wherein the projected area of the second cavity on the panel body is smaller than the projected area of the first cavity on the panel body.

7. The battery pack insulating panel of claim 5, wherein the second chamber comprises a plurality of second subchambers, the plurality of second subchambers being isolated from or in communication with each other.

8. The battery pack insulating panel of claim 5, wherein the second chamber is configured as a vacuum chamber and the second chamber has a vacuum level less than the vacuum level of the first chamber.

9. The battery pack insulating panel of claim 5, wherein the panel body comprises a first panel layer and a second panel layer, at least one of the first panel layer and the second panel layer being provided with a second groove in the first region, the first panel layer and the second panel layer being stacked and fixedly connected to form the second chamber.

10. The battery pack insulating panel of any one of claims 1-4, wherein the panel body comprises a first panel layer and a second panel layer, at least one of the first panel layer and the second panel layer being provided with a first groove in the second region, the first panel layer and the second panel layer being stacked and fixedly connected to form the first chamber.

11. The battery pack insulating panel of claim 10, wherein the second region surrounds the first region, the number of first grooves being plural, the plural first grooves being connected to form a serpentine groove structure.

12. The battery pack insulating panel of claim 1, further comprising a reinforcing structure.

13. The battery pack insulating panel of claim 12, wherein the reinforcing structure comprises a plurality of reinforcing plates fixedly attached to the panel body by fasteners, or,

the reinforcing structure comprises a plurality of reinforcing ribs, and the reinforcing ribs and the plate main body are integrally formed.

14. A battery pack comprising a tray and a battery cell pack fixedly mounted in the tray, characterized in that the battery pack further comprises a battery pack heat insulating plate according to any one of claims 1-13, the battery pack heat insulating plate being fixedly connected to the tray and being used for restraining the battery cell pack.

15. The battery pack of claim 14, wherein the cell stack comprises a plurality of cells, and wherein the battery pack thermal insulation panel further comprises a reinforcing structure fixedly attached to the panel body and configured as a reinforcing plate or rib extending in a direction perpendicular to the cell length direction.

16. A vehicle comprising the battery pack according to claim 14 or 15.