CN219937284U - Battery pack and vehicle - Google Patents

Abstract

The utility model discloses a battery pack and a vehicle. The battery pack of the present utility model includes a case including: a first plate member; the grid assembly is provided with a first surface wall and a second surface wall which are arranged in a deviating manner along a first direction, and the first surface wall is connected with the first plate; the grid assembly is provided with a plurality of first accommodating cavities, and the first accommodating cavities are provided with openings deviating from the first plate; an electrode assembly disposed in the first receiving chamber; the top cover assembly covers the first accommodating cavity and is connected with the grid assembly, and the electrode assembly is electrically connected with the top cover assembly; and a cushioning assembly disposed around at least a portion of the grille assembly. The battery pack integrates the battery core shell and the box body, improves the reliability and stability of the battery pack, and reduces the damage of impact and extrusion to the battery core structure through the buffer layer structure.

Description

Battery pack and vehicle

Technical Field

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

Background

The assembly flow of the traditional power battery system is as follows: the electrode assembly is placed in the aluminum shell, the top cover assembly is welded to manufacture a battery core, the battery core and the battery core are combined to form a module, and the module is installed in the battery box body to form a battery pack, or the battery core is directly installed in the battery box body to form the battery pack. Such a plurality of levels need more structure to fix each electric core, are unfavorable for the energy density of battery package to, each structure that installs fixedly to electric core is under the effect of receiving the external force, has great inefficacy risk, and battery package reliability, security remain to promote.

Disclosure of Invention

The utility model aims to provide a battery pack and a vehicle. The battery pack integrates the electrode assembly with the box body, improves the reliability and stability of the battery pack, and reduces the damage of impact and extrusion to the battery cell structure through the buffer assembly.

The embodiment of the utility model provides a battery pack, which comprises a box body, wherein the box body comprises:

a first plate member;

a grid assembly having first and second facing walls disposed apart from each other along a first direction, the first facing wall being connected to the first plate; the grid assembly is provided with a plurality of first accommodating cavities, and the first accommodating cavities are provided with openings deviating from the first plate;

an electrode assembly disposed within the first receiving chamber;

the top cover assembly is used for covering the first accommodating cavity and is connected with the grid assembly, and the electrode assembly is electrically connected with the top cover assembly;

a cushioning assembly disposed about at least a portion of the grid assembly.

In some embodiments, the case further includes a frame assembly disposed on the first plate and surrounding the periphery of the grill assembly, and the buffer assembly is disposed between the grill assembly and the frame assembly.

In some embodiments, the frame assembly includes a body and a partition member, the body includes a first wall surface and a second wall surface that are disposed opposite to each other along a second direction, and a third wall surface and a fourth wall surface that are connected between the first wall surface and the second wall surface at intervals along a third direction, two ends of the partition member are respectively connected with the first wall surface and the second wall surface and are located between the third wall surface and the fourth wall surface, and define a second accommodating cavity and a third accommodating cavity that are distributed along the third direction, and the grille assembly is disposed in the third accommodating cavity, wherein the second direction and the third direction intersect.

In some embodiments, the cushioning component has a thickness of 5 to 100mm.

In some embodiments, the cushioning assembly includes a first cushioning layer and a second cushioning layer disposed at intervals along a third direction, the first cushioning layer being located between the partition and the grid assembly, the second cushioning layer being located between the third wall and the grid assembly.

In some embodiments, the buffer assembly includes a third buffer layer and a fourth buffer layer disposed at intervals along a second direction, the third buffer layer being located between the first wall and the grid assembly, the fourth buffer layer being located between the second wall and the grid assembly, wherein the third direction intersects the second direction and the first direction two by two.

In some embodiments, the first buffer layer has a thickness D ₁ mm，5＜D ₁ ＜20。

In some embodiments, the second buffer layer has a thickness D ₂ mm，5＜D ₂ ＜100。

In some embodiments, the third buffer layer has a thickness D ₃ mm，5＜D ₃ ＜50。

In some embodiments, the fourth buffer layer has a thickness D ₄ mm，5＜D ₄ ＜50。

In some embodiments, the thickness of the first buffer layer is less than the thickness of the second buffer layer or the thickness of the third buffer layer or the thickness of the fourth buffer layer.

In some embodiments, the thickness of the third buffer layer or the fourth buffer layer is less than the thickness of the second buffer layer.

In some embodiments, the thickness of the third buffer layer or the fourth buffer layer is greater than the thickness of the first buffer layer.

In some embodiments, the battery pack further includes an electrical component electrically connected with the top cap assembly, the electrical component disposed in the second receiving cavity.

In some embodiments, the cap assembly includes a cap sheet and a tab, the cap sheet and the grid assembly are connected, the tab and the electrode assembly are electrically connected, and the battery pack further includes a connection row electrically connected with the tab.

In some embodiments, the case further includes a second plate attached to a side of the frame assembly facing away from the first plate.

Correspondingly, the embodiment of the utility model also provides a vehicle which comprises the battery pack, wherein the first plate is a bottom plate of the vehicle.

The utility model has the beneficial effects that: the utility model provides a battery pack, which comprises a box body, wherein the box body comprises: a first plate member; the grid assembly is provided with a first surface wall and a second surface wall which are arranged in a deviating manner along a first direction, and the first surface wall is connected with the first plate; the grid component is provided with a plurality of first accommodating cavities, and the first accommodating cavities are provided with openings deviating from the first plate; an electrode assembly disposed in the first receiving chamber; the top cover assembly is used for covering the first accommodating cavity and is connected with the grid assembly, and the electrode assembly is electrically connected with the top cover assembly; and a cushioning assembly disposed at least partially around the grille assembly. The battery pack disclosed by the utility model contains the electrode assembly through the first plate and the grid assembly, the energy density of the system is further improved, the grid assembly is surrounded by the buffer structure, the electrode assembly in the grid assembly is effectively protected, the force applied to the battery pack from the outside is buffered, the damage of the electrode assembly caused by the external impact force and extrusion is reduced, the short circuit phenomenon caused by the damage of the electrode assembly is avoided, and the safety of the battery pack is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a mounting structure of an electrode assembly and an aluminum case in the prior art;

FIG. 2 is a schematic view of a first plate and grid assembly according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an exploded view of a first panel, a grill assembly and a frame assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic view of an assembled structure of a first plate, a grid assembly and a frame assembly according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of an electrode assembly and a cap assembly according to an embodiment of the present utility model;

FIG. 6 is a schematic view of an exploded view of a first plate, a grid assembly, a frame assembly and an electrode assembly according to an embodiment of the present utility model;

FIG. 7 is a schematic view showing an assembled structure of a first plate, a grid assembly, a frame assembly and an electrode assembly according to an embodiment of the present utility model;

FIG. 8 is a top view of an assembled structure of a first plate, a grid assembly, a buffer assembly, a frame assembly, and an electrode assembly according to an embodiment of the present utility model;

FIG. 9 is a top view of an assembled structure of a first plate, a grid assembly, a buffer assembly, a frame assembly, and an electrode assembly according to an embodiment of the present utility model;

fig. 10 is a schematic view illustrating an exploded structure of a battery pack according to an embodiment of the present utility model;

FIG. 11 is a schematic view of an assembled battery pack according to an embodiment of the present utility model;

fig. 12 is a schematic structural view of another embodiment of a battery pack according to an embodiment of the present utility model;

fig. 13 is a schematic structural view of another implementation of a battery pack according to an embodiment of the present utility model;

wherein, 1, aluminum case, 10-case, 100-first plate, 200-grid assembly, 201-first surface wall, 202-second surface wall, 203-first accommodation chamber, 204-first side, 205-second side, 206-third side, 207-fourth side, 300-electrode assembly, 400-top cover assembly, 401-top cover sheet, 402-post, 500-buffer assembly, 501-first buffer layer, 502-second buffer layer, 503-third buffer layer, 504-fourth buffer layer, 600-frame assembly, 610-body, 601-partition, 602-first wall, 603-second wall, 604-third wall, 605-fourth wall, 710-second accommodation chamber, 720-third accommodation chamber, 800-connection row, 900-second plate.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. 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 one or more features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1, which is a schematic connection diagram of an electrode assembly 300, a top cap assembly 400 and an aluminum case 1 in the prior art, after the top cap assembly 400 is welded to the prior electrode assembly 300, the top cap assembly 400 and the aluminum case 1 are welded to form a battery unit, the battery unit is mounted on a lower case of a battery system side by side in a manner of gluing, mechanical fixing and the like. In view of the above, embodiments of the present utility model provide a battery pack structure that solves at least one of the above-mentioned problems.

Fig. 2, fig. 3 and fig. 4 show a schematic perspective view of a first plate 100 and a grid assembly 200 according to an embodiment of the present utility model, fig. 3 shows an exploded view of a frame assembly 600 and the first plate 100 and the grid assembly 200 according to an embodiment of the present utility model, and fig. 4 shows an assembled view of the first plate 100, the grid assembly 200 and the frame assembly 600 according to an embodiment of the present utility model. In addition, the first direction described in the embodiment of the present utility model is a direction along which the Z axis extends, the second direction is a direction along which the X axis extends, and the third direction is a direction along which the Y axis extends, where the first direction, the second direction, and the third direction intersect in pairs, preferably, the first direction, the second direction, and the third direction are perpendicular to each other; the vertical described in this utility model is not absolute vertical and may be near vertical; the parallelism described in the present utility model is not absolutely parallel and may be nearly parallel.

As shown in fig. 2, the battery pack of the present utility model includes a case 10, where the case 10 includes a first plate 100, and in some embodiments, the first plate 100 has a flat plate structure, and the shape of the first plate 100 can be adjusted according to actual needs, and in some embodiments, the first plate 100 has a long plate or a square plate structure.

The present utility model provides a grill assembly 200 on a first panel 100, the grill assembly 200 having a first surface wall 201 and a second surface wall 202 disposed apart from each other along a first direction Z, the first surface wall 201 being connected to the first panel 100. In some embodiments, the grid assembly 200 is integrally connected with the first plate 100.

In some embodiments, the grid assembly 200 is provided with a plurality of first receiving cavities 203, the first receiving cavities 203 having openings facing away from the first plate 100, and the electrode assemblies 300 are received in the first receiving cavities 203. According to the utility model, the grid assembly 200 is arranged on the first plate 100, and the electrode assembly 300 is arranged in the grid assembly 200, so that the shell structure of the battery cell can be omitted, the energy density of the battery pack is improved, and the adhesive structure between the battery cell structure and the box body is reduced due to the integral structure of the grid assembly 200, and the stability and the reliability of the battery pack structure can be increased. The shape of the first accommodating cavity 203 can be adjusted according to practical needs, for example, the first accommodating cavity 203 is a hollow cylinder structure, for example, the first accommodating cavity 203 is a hollow square cylinder, a long cylinder structure or a cylinder structure. The present utility model adopts the top cover assembly 400 to cover the first receiving chamber 203 and connect with the grid assembly 200, and the shape of the top cover assembly 400 is adaptively adjusted according to the shape of the horizontal section (the plane parallel to the X-Y axis) of the first receiving chamber 203. In some specific embodiments, the first accommodating chamber 203 has a rectangular parallelepiped structure, and the top cover assembly 400 is a rectangular plate.

As shown in fig. 8, in some embodiments, a buffer assembly 500 is disposed between the grid assembly 200 and the frame assembly 600, and the buffer assembly 500 is disposed around at least a portion of the grid assembly 200, and the buffer assembly 500 disposed at the periphery of the grid assembly 200 can buffer the external force applied to the battery pack, thereby protecting the cell structure and avoiding the problem of thermal runaway caused by the short circuit of the electrode assembly 300 due to the compression of the force. In a specific application, the buffer component 500 may be a filling glue (structural glue), or may be a flexible material with a buffer effect, such as a sponge, foam, rubber, etc.

As shown in fig. 3 and 4, in order to further increase the structural stability of the battery pack, in some embodiments, the outer circumference of the grid assembly 200 is provided with a frame assembly 600, and the frame assembly 600 surrounding the grid assembly 200 may reinforce the protection of the grid assembly 200. In some embodiments, the frame assembly 600 is mounted on the first plate 100, and the frame assembly 600 is fixed to the first plate 100 to enhance the stability of the entire structure and to withstand the impact force of the outside of the battery pack. The present utility model further reduces the external impact of the grill assembly 200 by the frame assembly 600.

As shown in fig. 5, 6 and 7, fig. 5 is a schematic view of the electrode assembly 300 welded with the cap assembly 400, fig. 6 is a schematic view of the assembly process of the electrode assembly 300 and the grid assembly 200, fig. 7 is a schematic view of the assembly process of the electrode assembly 300 after installation, and as can be seen from fig. 7, the electrode assembly 300 is placed in the first receiving chamber 203, the cap assembly 400 seals the first receiving chamber 203 and is electrically connected to the electrode assembly 300, and in some application cases, the cap assembly 400 seals the first receiving chamber 203 by welding with the grid assembly 200.

To increase the strength of the frame assembly 600, in some embodiments, the frame assembly 600 of the present utility model includes a body 610 and a partition 601, wherein the body 610 includes a first wall 602 and a second wall 603 disposed opposite to each other along a second direction X, and a third wall 604 and a fourth wall 605 connected between the first wall 602 and the second wall 603 at intervals along a third direction. The first wall 602, the second wall 603, the third wall 604, and the fourth wall 605 enclose the frame assembly 600. In some embodiments, the frame assembly 600 is a square or rectangular frame that wraps around the perimeter of the grid assembly 200. Likewise, the grid assembly 200 has four sides, including oppositely disposed first 204 and second 205 sides, oppositely disposed third 206 and fourth 207 sides. Taking the structure shown in fig. 8 as an example, the first side 204 is a side of the grid assembly 200 adjacent to the first wall 602 and parallel to the first wall 602, the second side 205 is a side of the grid assembly 200 adjacent to the second wall 603 and parallel to the second wall 603, the third side 206 is a side of the grid assembly 200 adjacent to the third wall 604 and parallel to the third wall 604, and the fourth side 207 is a side of the grid assembly 200 adjacent to the fourth wall 605 and parallel to the fourth wall 605. In some embodiments, two ends of the partition member 601 are respectively connected to two adjacent wall surfaces of the frame assembly 600 and define a second accommodating cavity 710 and a third accommodating cavity 720 distributed along the third direction Y, and the grid assembly 200 is disposed in the third accommodating cavity 720, so that the second accommodating cavity 710 has a buffering effect, and further increases the safety of the battery pack; specifically, both ends of the partition 601 are connected to the first wall 602 and the third wall 604 or the fourth wall 605, respectively; or two ends of the partition 601 are respectively connected with two opposite wall surfaces of the frame assembly 600, for example, two ends of the partition 601 are respectively connected with the first wall surface 602 and the second wall surface 603, or two ends of the partition 601 are respectively connected with the third wall surface 604 and the fourth wall surface 605. Further, the partition 601 may be one or more, distributed between the grid assembly 200 and the frame assembly 600. One of the functions of the partition 601 of the present utility model is to function as a reinforcing rib, increasing the strength of the entire battery pack structure. Further, as can be seen from the above description, the extending direction of the partition 601 may be multiple directions, and only the partition 601 needs to be erected inside the frame assembly 600, and both ends of the partition 601 may abut against the inner wall of the frame assembly 600 or abut against the wall surface of the frame assembly 600 and the side surface of the grid assembly 200 respectively. In some specific embodiments, the partition 601 extends along the second direction X, and in other specific embodiments, the partition 601 extends along the third direction Y.

Further, as shown in fig. 8, the buffer assemblies 500 of the present utility model are distributed around the grid assembly 200, and the buffer assemblies 500 are used to protect the cell structure when the battery pack is impacted.In some embodiments, the cushioning assembly 500 includes a first cushioning layer 501, the first cushioning layer 501 being located between the partition 601 and the grid assembly 200, in particular, the first cushioning layer 501 may be disposed continuously, discontinuously or at intervals between the partition 601 and the fourth side 207, such as the first cushioning layer 501 being a plurality of dot-like structures formed by the filling glue; or the first buffer layer 501 is a plurality of strip structures formed by filling glue, each strip structure can be arranged in parallel or in non-parallel, and the strip structures can be arranged in equal length or non-equal length; or the first buffer layer 501 forms a planar structure, which may be a continuous planar or discontinuous planar structure, and may be a regular planar or irregular planar structure. In some specific embodiments, the first cushioning layer 501 is a planar structure that covers the partition 601 or the fourth side 207. In other specific embodiments, the first buffer layer 501 has a thickness D ₁ mm, where 5 < D ₁ < 20 (the thickness direction of the first buffer layer 501 is the third direction Y direction).

In some embodiments, the cushioning assembly 500 includes a second cushioning layer 502, the second cushioning layer 502 being located between the third wall 604 and the grid assembly 200, and in particular, the second cushioning layer 502 may be continuous, discontinuous, or spaced between the third wall 604 and the third side 206. Likewise, the structural form of the second buffer layer 502 may be selected from any of the structural forms of the first buffer layer 501 described above. In some specific embodiments, the first buffer layer 501 is a planar structure that covers the third wall 604 or the third side 206. In other specific embodiments, the second buffer layer 502 has a thickness D ₂ mm, satisfy: d is 5 < ₂ < 100 (the thickness direction of the second buffer layer 502 is the third direction Y direction).

In some embodiments, the second buffer layer 502 is present simultaneously with the first buffer layer 501 and is spaced apart along the third direction Y.

In some embodiments, the cushioning assembly 500 includes a third cushioning layer 503, the third cushioning layer 503 being located between the first wall 602 and the grid assembly 200, in particular, the third cushioning layer 503 may be continuous between the first wall 602 and the first side 204,Discontinuous or spaced apart. Likewise, the third buffer layer 503 may be configured as any one of the first buffer layers 501 described above. In some specific embodiments, the third buffer layer 503 covers the planar structure of the first wall 602 or the first side 204. In other specific embodiments, thickness D of third buffer layer 503 ₃ mm, satisfy: d is 5 < ₃ < 50 (the thickness direction of the third buffer layer 503 is the second direction X direction).

In some embodiments, the third buffer layer 503 is present and connected to the second buffer layer 502.

In other embodiments, the first buffer layer 501, the third buffer layer 503 and the second buffer layer 502 are present at the same time, and the third buffer layer 503 is connected between the second buffer layer 502 and the first buffer layer 501.

In some embodiments, the cushioning layer includes a fourth cushioning layer 504, the fourth cushioning layer 504 being located between the second wall 603 and the grid assembly 200, in particular, the fourth cushioning layer 504 may be continuous, discontinuous, or spaced between the second wall 603 and the second side 205. Likewise, the fourth buffer layer 504 may be configured in any of the configurations of the first buffer layer 501 described above. In some specific embodiments, the fourth buffer layer 504 is a planar structure covering the second wall 603 or the second side 205. In other specific embodiments, thickness D of fourth buffer layer 504 ₄ mm, satisfy: d is 5 < ₄ < 50 (the thickness direction of the fourth buffer layer 504 is the second direction X direction).

In some embodiments, the fourth buffer layer 504 and the third buffer layer 503 are present at the same time and are spaced apart along the second direction X.

In other embodiments, the first buffer layer 501, the third buffer layer 503, the second buffer layer 502, and the fourth buffer layer 504 are present simultaneously and are connected end-to-end in sequence.

To further optimize the structural space, in some embodiments, the thickness of the first buffer layer 501 is less than the thickness of the second buffer layer 502, and the thickness of the third buffer layer 503 and the fourth buffer layer 504 is between the thickness of the first buffer layer 501 and the thickness of the second buffer layer 502. In a specific application, the second buffer layer is positioned at the outer side of the battery pack structure and is subjected to higher impact force, so that the thickness of the second buffer layer is larger than that of the rest buffer layers; the third buffer layer 503 and the fourth buffer layer 504 are located at both sides of the battery pack structure and receive a larger impact force than the first buffer layer 501 located at the inner side of the battery pack structure, so that the thickness of the third buffer layer 503 and the fourth buffer layer 504 is smaller than that of the second buffer layer 502 but larger than that of the first buffer layer 501; the first buffer layer 501 is also of minimal thickness because it is positioned between the partition 601 and the grid assembly 200 and is subjected to relatively small impact forces. According to the utility model, the structure of the buffer layer is optimized, so that the space structure of the battery pack is optimized, the reliability is improved, and the space is saved.

As shown in fig. 8, the partition 601 of the present utility model encloses the first wall 602, the second wall 603, and the fourth wall 605 into a second accommodating cavity 710, and the second accommodating cavity 710 may be used as a space for installing other structures of a battery pack.

As shown in fig. 9, 10 and 11, the cap assembly 400 includes a cap plate 401 and a post 402, the cap plate 401 is connected to the grid assembly 200, and the post 402 is electrically connected to the electrode assembly 300; the battery pack also includes a connection row 800, and the connection row 800 is electrically connected with the electrode post 402 to conduct current of the electrode assembly 300.

As shown in fig. 10, the case further includes a second plate 900, where the second plate 900 is connected to a side of the frame assembly 600 facing away from the first plate 100, and the case 10 is sealed by the second plate 900, and in a specific application, the second plate 900 is a flat plate structure, and the shape of the second plate 900 is adapted to the shape of a horizontal section (a plane parallel to a plane formed by the X-axis and the Y-axis) of the case 10.

As shown in fig. 12 and 13, the embodiment of the present utility model further provides a vehicle including the above-described battery pack structure.

In some embodiments, the first panel 100 is a floor of a vehicle.

According to the embodiment of the utility model, the box body of the battery pack is integrated with the battery cell aluminum shell, aluminum shell removal is realized, space utilization rate and energy density are greatly improved, the distance between integrated battery cell structures is smaller, the electric connection path of the corresponding battery cell system level is shortened, the internal resistance and the materials of the series connection rows are reduced, and the cost is reduced. In addition, the battery cell system of the present utility model is provided with the buffer assembly in the gap of the frame assembly 600, which greatly reduces the impact and extrusion of the external force to the battery pack structure, thereby reducing the damage of the battery cell structure.

In one specific embodiment, the battery pack is installed by:

extruding a plurality of first receiving cavities 203 on the first plate 100 to form a grill assembly 200;

welding the frame assembly 600 and the first plate 100 to form the case 10;

welding the electrode assembly 300 with the cap assembly 400, specifically, welding the electrode post 402 with the electrode assembly 300;

placing the electrode assembly 300 (the welded top cap assembly 400) into the first receiving chamber 203 of the welded case 10;

welding the top cap assembly 400 to the top of the first receiving chamber 203 of the case 10, that is, welding the top cap sheet 401 to the second surface wall 202, sealing the first receiving chamber 203 and the electrode assembly 300 therein;

the connecting bar 800 is welded with the pole 402 to form electric connection, and the welded connecting bar 800 has shorter length, smaller resistance and can save materials due to the integration of the battery cell assembly;

the gap between the grid assembly 200 and the frame assembly 600 is filled with structural adhesive as the buffer assembly 500, and when the box 10 is impacted and extruded, the buffer assembly 500 plays a role in buffering, so that the damage of impact and extrusion to the cell structure is greatly reduced.

Likewise, the first plate 100 may be a chassis of a vehicle, and after being integrated with a frame of the vehicle, the first plate may be further integrated, so as to more effectively reduce the application of structural components and improve the energy density.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The foregoing has outlined a detailed description of a battery pack and vehicle in accordance with the embodiments of the present utility model, wherein specific examples are provided herein to illustrate the principles and embodiments of the present utility model, and the above examples are provided to assist in understanding the method and core concepts of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims (11)

1. A battery pack comprising a case (10), the case (10) comprising:

a first plate (100);

-a grid assembly (200), the grid assembly (200) having a first (201) and a second (202) facing away from each other along a first direction (Z), the first (201) being connected to the first plate (100); the grid assembly (200) is provided with a plurality of first accommodating cavities (203), and the first accommodating cavities (203) are provided with openings facing away from the first plate (100);

an electrode assembly (300), the electrode assembly (300) being disposed within the first receiving chamber (203);

a top cap assembly (400), the top cap assembly (400) covering the first receiving chamber (203) and being connected to the grid assembly (200), the electrode assembly (300) being electrically connected to the top cap assembly (400);

-a cushioning assembly (500), said cushioning assembly (500) being arranged around at least part of said grid assembly (200).

2. The battery pack according to claim 1, wherein the case (10) further includes a frame assembly (600), the frame assembly (600) being disposed on the first plate (100) and surrounding the periphery of the grid assembly (200), the buffer assembly (500) being disposed between the grid assembly (200) and the frame assembly (600).

3. The battery pack according to claim 2, wherein the frame assembly (600) comprises a body (610) and a partition member (601), the body (610) comprises a first wall surface (602) and a second wall surface (603) which are oppositely arranged along a second direction (X) and a third wall surface (604) and a fourth wall surface (605) which are connected between the first wall surface (602) and the second wall surface (603) at intervals along a third direction (Y), two ends of the partition member (601) are respectively connected with the first wall surface (602) and the second wall surface (603) and are positioned between the third wall surface (604) and the fourth wall surface (605), and a second accommodating cavity (710) and a third accommodating cavity (720) which are distributed along the third direction (Y) are defined, and the grid assembly (200) is arranged in the third accommodating cavity (720), wherein the second direction (X) and the third direction (Y) intersect.

4. The battery pack according to claim 1, wherein the thickness of the buffer member (500) is 5 to 100mm.

5. A battery pack according to claim 3, wherein the buffer assembly (500) comprises a first buffer layer (501) and a second buffer layer (502) arranged at intervals along a third direction (Y), the first buffer layer (501) being located between the partition (601) and the grid assembly (200), the second buffer layer (502) being located between the third wall (604) and the grid assembly (200); and/or the number of the groups of groups,

the buffer assembly (500) comprises a third buffer layer (503) and a fourth buffer layer (504) which are arranged at intervals along a second direction (X), wherein the third buffer layer (503) is positioned between the first wall surface (602) and the grid assembly (200); -the fourth cushioning layer (504) is located between the second wall (603) and the grid assembly (200); the third direction (Y) intersects with the second direction (X) and the first direction (Z) in pairs.

6. The battery pack of claim 5, wherein the battery pack satisfies at least one of the following conditions:

i) The thickness of the first buffer layer (501) is D ₁ mm，5＜D ₁ ＜20；

ii) the second buffer layer (502) has a thickness D ₂ mm，5＜D ₂ ＜100；

iii) The thickness of the third buffer layer (503) is D ₃ mm，5＜D ₃ ＜50；

iii) the fourth buffer layer (504) has a thickness D ₄ mm，5＜D ₄ ＜50。

7. The battery pack of claim 5, wherein the battery pack satisfies at least one of the following conditions:

i) The thickness of the first buffer layer (501) is smaller than the thickness of the second buffer layer (502) or the thickness of the third buffer layer (503) or the thickness of the fourth buffer layer (504);

ii) the thickness of the third buffer layer (503) or the fourth buffer layer (504) is smaller than the thickness of the second buffer layer (502);

iii) The thickness of the third buffer layer (503) or the fourth buffer layer (504) is greater than the thickness of the first buffer layer (501).

8. The battery pack of claim 3, further comprising an electrical component electrically connected to the top cap assembly (400), the electrical component disposed in the second receiving cavity (710).

9. The battery pack according to claim 1, wherein the top cap assembly (400) includes a top cap plate (401) and a post (402), the top cap plate (401) being connected to the grid assembly (200), the post (402) being electrically connected to the electrode assembly (300); the battery pack also includes a connection row (800), the connection row (800) being electrically connected with the pole (402).

10. The battery pack of claim 2, wherein the case (10) further comprises a second plate (900), the second plate (900) being connected to a side of the frame assembly (600) facing away from the first plate (100).

11. A vehicle comprising a battery pack according to any one of claims 1 to 10, the first panel (100) being a floor of the vehicle.