CN220420794U

CN220420794U - Battery pack and electric equipment

Info

Publication number: CN220420794U
Application number: CN202322065896.9U
Authority: CN
Inventors: 孟金强; 廖正远; 王小龙; 万云发; 付伟壮
Original assignee: BYD Co Ltd; Shenzhen BYD Auto R&D Co Ltd
Current assignee: BYD Co Ltd; Shenzhen BYD Auto R&D Co Ltd
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2024-01-30
Anticipated expiration: 2033-08-02

Abstract

The embodiment of the utility model provides a battery pack and electric equipment, which comprises the following components: the battery cell assembly comprises a plurality of battery cells; the battery cell assembly is arranged in the tray, and a plurality of battery cells are sequentially arranged at intervals along the first direction; the backup pad is located between the inner wall of electric core subassembly and tray, and backup pad along first direction swing joint in the tray to adjust the backup pad and the electric core that is close to with it interval in first direction. The expansion capacity of the battery cell can be improved, the circulation capacity of the battery cell is reduced, and the life cycle length of the battery pack is further improved.

Description

Battery pack and electric equipment

Technical Field

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

Background

Currently, battery packs are typically composed of cells stacked in sequence from left to right, and the battery packs are typically secured in a limited area on a tray. In order to meet the requirement that the last battery cell on the right side is smoothly clamped into the limit area of the tray, the assembly gap between the last battery cell and the edge beam of the tray needs to be ensured to be large enough, however, under the condition that the assembly gap between the last battery cell and the edge beam of the tray is large, the last battery cell is caused to have a large circulation gap, the expansion capacity of the battery cell is easily influenced, the circulation capacity of the battery cell is reduced, and the life cycle length of the whole package of the battery pack is influenced.

Disclosure of Invention

In view of the foregoing, embodiments of the present utility model have been developed to provide a battery pack and powered device that overcome, or at least partially solve, the foregoing problems.

In order to solve the above problems, an embodiment of the present utility model discloses a battery pack including: the battery cell assembly comprises a plurality of battery cells; wherein,

the battery cell assembly is arranged in the tray, and a plurality of battery cells are sequentially arranged at intervals along a first direction;

the support plate is arranged between the battery cell assembly and the inner wall of the tray, and is movably connected to the tray along the first direction so as to adjust the distance between the support plate and the battery cell close to the support plate in the first direction.

Optionally, the supporting plate is provided with a first limiting piece, and the tray is provided with a second limiting piece;

the first limiting piece is in limiting connection with the second limiting piece.

Optionally, the tray includes a first side frame and a second side frame that are oppositely disposed at two sides of the battery cell assembly along the first direction, and the second limiting member is a connection hole disposed on the second side frame;

the supporting plate is arranged between the battery cell assembly and the second side frame;

the first limiting piece penetrates through the connecting hole and is movably connected with the second side frame along the first direction.

Optionally, the first limiting member is a first limiting column, a strip-shaped hole is formed in the first limiting column, and the battery pack further comprises a first connecting member;

the elongated hole extends along the first direction;

the first connecting piece is arranged in the elongated hole in a penetrating mode and is detachably connected with the first limiting column.

Optionally, a positioning piece is arranged on one side, far away from the supporting plate, of the second side frame, and a mounting hole opposite to the strip-shaped hole is formed in the positioning piece;

the locating piece with first locating piece butt, first connecting piece wears to locate in proper order rectangular shape hole with the mounting hole, first connecting piece with the locating piece can dismantle the connection.

Optionally, the first limiting member is a second limiting column, a plurality of penetrating holes are formed in the second limiting column at intervals along the first direction, and the battery pack further comprises a second connecting member;

the second connecting piece is arranged in one of the penetrating holes in a penetrating mode and is detachably connected with the second limiting column.

Optionally, the limiting piece comprises a first limiting rod and a second limiting rod;

the first limiting rod and the second limiting rod are connected in a telescopic manner along the first direction;

the first limiting rod penetrates through the connecting hole and is movably connected with the second side frame, and/or the second limiting rod penetrates through the connecting hole and is movably connected with the second side frame.

Optionally, the number of first limiting pieces includes at least two;

the second limiting parts are arranged in one-to-one correspondence with the first limiting parts;

at least two first limiting parts are arranged on the supporting plate at intervals along the second direction and/or the third direction, and the first direction, the second direction and the third direction are mutually perpendicular.

Optionally, the gaps between two adjacent battery cells along the first direction are a first distance, the gaps between the support plate and the adjacent battery cell assembly along the first direction are a second distance, and the first distance is greater than the second distance.

Optionally, the first distance is equal to twice the second distance.

Optionally, the electric cores arranged at two ends along the first direction are a first electric core and a second electric core;

in the first direction, a gap between the first cell and an inner wall of the tray is equal to a gap between the second cell and the support plate.

Optionally, the gap between the support plate and the cell adjacent to the support plate in the first direction is 0.1-1mm.

In a second aspect, the utility model also provides electric equipment, which comprises an electric equipment body and the battery pack;

the battery pack is arranged on the electricity utilization body and is used for supplying power to the electricity utilization body.

The embodiment of the utility model has the following advantages:

in the embodiment of the utility model, the battery cell assembly is arranged in the tray, and the plurality of battery cells are sequentially arranged at intervals along the first direction, and the support plate is arranged between the battery cell assembly and the inner wall of the tray and is movably connected with the tray along the first direction, so that the distance between the support plate and the battery cell close to the support plate in the first direction can be controlled, the circulation gap of the battery cell is reduced, the expansion capacity of the battery cell is improved, the circulation capacity of the battery cell is improved, and the life cycle length of the battery pack is further improved.

Drawings

Fig. 1 is a schematic view of a battery pack according to an embodiment of the present utility model;

fig. 2 is a schematic view of a structure of another battery pack in an embodiment of the present utility model;

FIG. 3 is a schematic view of a tray according to an embodiment of the present utility model;

fig. 4 is a partial schematic structure of a battery pack according to an embodiment of the present utility model;

fig. 5 is a partial schematic structure of another battery pack in an embodiment of the present utility model.

Reference numerals illustrate:

the novel solar cell module comprises a 1-tray, a 11-tray body, a 12-first side frame, a 13-second side frame, a 131-connecting hole, a 132-positioning piece, a 2-cell assembly, a 21-cell, a 3-supporting plate, a 31-first limiting piece, a 311-long strip-shaped hole and a 4-first connecting piece.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question 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.

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 or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

One of the core concepts of the embodiments of the present utility model is to disclose a battery pack, which, as shown in fig. 1 to 5, may include a tray 1, a cell assembly 2, and a support plate 3, and the cell assembly 2 may include a plurality of cells 21; the battery cell assembly 2 is arranged in the tray 1, and a plurality of battery cells 21 are sequentially arranged at intervals along the first direction; the backup pad 3 is located between the inner wall of electric core subassembly 2 and tray 1, and backup pad 3 is along first direction swing joint in tray 1 to adjust backup pad 3 and the interval of electric core 21 that is close to it in first direction.

In the embodiment of the utility model, the battery cell assembly 2 is arranged in the tray 1, and the plurality of battery cells 21 are sequentially arranged at intervals along the first direction, and the support plate 3 is arranged between the battery cell assembly 2 and the inner wall of the tray 1, and the support plate 3 is movably connected to the tray 1 along the first direction, so that the distance between the support plate 3 and the battery cell 21 close to the support plate in the first direction can be controlled, the circulation gap of the battery cell 21 is reduced, the expansion capacity of the battery cell 21 is improved, the circulation capacity of the battery cell 21 is improved, and the life cycle length of the battery pack is further improved.

Optionally, a groove may be provided on the tray 1, and the notch of the groove faces upwards, and both the cell assembly 2 and the support plate 3 may be placed in the groove.

Alternatively, the tray 1 may include a tray body 11, both ends of the tray 1 along the first direction may be provided with a first side frame 12 and a second side frame 13, respectively, and/or both ends of the tray 1 along a direction perpendicular to the first direction may be provided with a third side frame and a fourth side frame, respectively; the first side frame 12, the second side frame 13, the third side frame and the fourth side frame may be respectively disposed at four sides of the tray body 11. The first side frame 12, the second side frame 13, and/or the third side frame and the fourth side frame may enclose with the tray body 11 to form a containing space, where the containing space is used for placing the battery cell assembly 2 and the support plate 3.

Specifically, the support plate 3 may be fixedly coupled with any one of the first side frame 12, the second side frame 13, the third side frame, the fourth side frame, and the tray body 11 to lock the support plate 3 and the tray 1.

Specifically, the first direction is a length direction of the tray 1, and the corresponding second direction is a width direction of the tray 1; the first direction is the width direction of the tray 1, and the corresponding second direction is the length direction of the tray 1.

As an example, as shown in fig. 3, the first side frame 12 and the second side frame 13 are disposed opposite to each other along the first direction, so that the first side frame 12, the second side frame 13, and the tray body 11 may enclose to form a U-shaped space. Further, a U-shaped space may be used to accommodate the support plate 3 and the cell assembly 2.

Specifically, the tray body 11 may have a flat plate structure so as to support the cell assembly 2 and the support plate 3. The first side frame 12 may be a flat plate structure, or the first side frame 12 may be a frame formed by welding a plurality of cross beams and upright posts, or the first side frame 12 may be a side beam structure; the structures of the first side frame 12, the second side frame 13, the third side frame and the fourth side frame may be the same or different, and the second side frame 13, the third side frame and the fourth side frame may be set with reference to the first side frame 12, which is not described in detail in the embodiment of the present utility model.

Specifically, the cell assembly 2 may be formed by stacking a plurality of cells 21 sequentially along the first direction, and two adjacent cells 21 are disposed at intervals, in this embodiment of the present utility model, the tray 1 may include a first slot wall and a second slot wall along the first direction, the cell assembly 2 may be disposed between the first slot wall and the support plate 3, and the cells 21 at two ends of the cell assembly 2 along the first direction may be a first cell and a second cell respectively; the first cell may be arranged close to the first cell wall and the second cell may be arranged close to the support plate 3.

Further, since the support plate 3 is movably connected to the tray 1 along the first direction, the support plate 3 is disposed between the cell assembly 2 and the inner wall of the tray 1, i.e., the second slot wall, so that the distance between the support plate 3 and the second slot wall in the first direction is adjusted. Before the cell assembly 2 is installed, the supporting plate 3 can be adjusted to be clung to the second groove wall, and the distance between the supporting plate 3 and the first groove wall is increased; then, stacking the battery cells 21 can be started, after the battery cells 21 are completely stacked, the supporting plate 3 is pushed towards the battery cells 21 along the first direction, the distance between the second battery cells and the supporting plate 3 is adjusted, then the supporting plate 3 and the tray 1 are fixed, the expansion distance between the supporting plate 3 and the second battery cells is further ensured, the circulation gap of the second battery cells is reduced, the expansion capacity of the battery cells 21 is improved, the circulation capacity of the battery cells 21 is improved, and the life cycle length of the battery pack is further improved; and the assembly process is simple, the structure is simple, and the mass production and the use are easy.

Specifically, the cell assembly 2 may be first mounted in the tray 1, then, after confirming the expansion distance of the second cell, the support plate 3 may be mounted between the cell assembly 2 and the inner wall of the tray 1, and further, after adjusting the distance between the support plate 3 and the cell 21 adjacent thereto, that is, the second cell in the first direction, the support plate 3 and the tray 1 may be fixed.

Alternatively, the support plate 3 may be provided with a first stopper 31 and the tray 1 may be provided with a second stopper; the first limiting member 31 is in limiting connection with the second limiting member.

In the embodiment of the utility model, the support plate 3 and the tray 1 are conveniently fixed by the limit connection between the first limit piece 31 and the second limit piece so as to fix the spacing between the support plate 3 and the adjacent battery cell 21 in the first direction and ensure the expansion gap of the battery cell 21.

Specifically, the first limiting piece 31 and the second limiting piece are correspondingly arranged, and the first limiting piece 31 and the second limiting piece are detachably connected, so that when the first limiting piece 31 and the second limiting piece are detached, the position of the supporting plate 3 can be conveniently adjusted; the support plate 3 and the tray 1 are conveniently fixed when the first limiting member 31 and the second limiting member are in limiting connection.

Optionally, the support plate 3 may include a first side frame 12 and a second side frame 13 disposed opposite to each other on two sides of the cell assembly 2 along the first direction, and the second limiting member is a connection hole 131 disposed on the second side frame 13; the support plate 3 may be disposed between the cell assembly 2 and the second side frame 13; the first limiting part 31 may be disposed through the connection hole 131 and movably connected to the second side frame 13 along the first direction, so as to facilitate adjusting the position of the support plate 3 relative to the second side frame 13, and further, by adjusting the distance between the support plate 3 and the second side frame 13 in the first direction, the distance between the support plate 3 and the cell 21 close to the support plate 3 in the first direction is achieved.

Specifically, the connection hole 131 may be a threaded hole or a through hole, and may be specifically set according to actual requirements, which is not specifically limited in the embodiment of the present utility model.

In some alternative embodiments of the present utility model, as shown in fig. 4 and 5, the first limiting member 31 may be a first limiting post, and an elongated hole 311 may be disposed on the first limiting post, and the battery pack may further include a first connecting member 4; the elongated hole 311 may extend in a first direction; the first connecting piece 4 can be arranged in the strip-shaped hole 311 in a penetrating mode and is detachably connected with the first limiting column, so that limiting connection between the first limiting piece 31 and the second limiting piece is convenient to achieve when the first connecting piece 4 is connected with the first limiting column, and the relative position between the supporting plate 3 and the tray 1 is convenient to adjust when the first connecting piece 4 is detached from the first limiting column.

Specifically, the first connecting member 4 may be disposed at a side of the second side frame 13 away from the support plate 3, and the first connecting member 4 may be connected with the first limiting member 31 and the second limiting member, respectively, for fastening the first limiting member 31 and the second limiting member.

Specifically, the first connecting piece 4 may be a fastener, so that the first connecting piece 4 may be fastened and connected with the first limiting post, and the first connecting piece 4 may abut against a side of the second side frame 13 away from the support plate 3. Or, the first connecting piece 4 may include a bolt and a nut, the bolt may pass through the elongated hole 311 and be in threaded connection with the nut, and the nut may be in abutting connection with a side of the second side frame 13 away from the support plate 3, so as to realize limiting connection between the first limiting piece 31 and the second limiting piece through cooperation of the bolt and the nut, and the structure strength is good through bolt fixation.

Specifically, the elongated hole 311 may include a waist-shaped hole and a straight hole.

Optionally, a positioning member 132 is disposed on a side of the second side frame 13 away from the support plate 3, and the positioning member 132 is provided with a mounting hole opposite to the elongated hole 311; the positioning piece 132 is abutted with the first limiting piece 31, the first connecting piece 4 sequentially penetrates through the strip-shaped hole 311 and the mounting hole, and the first connecting piece 4 is detachably connected with the positioning piece 132.

In the embodiment of the utility model, the positioning piece 132 is disposed on the second side frame 13, so that the positioning piece 132 can perform the limitation in the first direction, and thus, the first connecting piece 4 sequentially penetrates through the elongated hole 311 and the mounting hole and is connected with the positioning piece 132, so that the distance between the support plate 3 and the second side frame 13 in the first direction can be reliably limited.

Specifically, the first connecting member 4 may be a bolt or a screw, the mounting hole may be a threaded hole, and the mounting hole may be opposite to the elongated hole 311.

Specifically, the positioning member 132 may be a structure such as a limiting rod, a limiting block, or a limiting plate.

In other alternative embodiments of the present utility model, the first limiting member 31 may be a second limiting post, the first limiting member 31 may be provided with a plurality of penetrating holes spaced apart along the first direction, and the battery pack may further include a second connecting member; the second connecting piece can be arranged in one of the penetrating holes in a penetrating mode and is detachably connected with the second limiting column.

In the embodiment of the present utility model, a plurality of through holes are disposed on the first limiting member 31 at intervals along the first direction, and by matching the second connecting member with different through holes, the support plate 3 can be movably connected to the tray 1 along the first direction, so as to adjust the distance between the support plate 3 and the adjacent battery cell 21 along the first direction.

Specifically, the number of the through holes may be set according to actual requirements, which is not particularly limited in the embodiment of the present utility model.

In still other alternative embodiments of the present utility model, the first stop 31 may include a first stop bar and a second stop bar; the first limiting rod and the second limiting rod can be connected in a telescopic manner along the first direction; the first limiting rod may be disposed through the connection hole 131 and movably connected with the second side frame 13, and/or the second limiting member 31 is disposed through the connection hole 131 and movably connected with the second side frame 13.

In the embodiment of the utility model, the first limiting rod and the second limiting rod are connected in a telescopic manner along the first direction, so that the adjustable range of the distance between the supporting plate 3 and the second side frame 13 in the first direction can be further enlarged.

Specifically, the first limiting rod can be sleeved on the second limiting rod, or the second limiting rod is sleeved on the first limiting rod, so that telescopic connection between the first limiting rod and the second limiting rod is realized.

Alternatively, the number of the first stoppers 31 may include at least two; the second limiting members may be disposed in one-to-one correspondence with the first limiting members 31; at least two first limiting members 31 may be disposed on the support plate 3 at intervals along the second direction and/or the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

In the embodiment of the present utility model, at least two first limiting members 31 are disposed on the support plate 3 at intervals along the second direction and/or the third direction, so that the fixing points between the support plate 3 and the tray 1 can be increased, and the reliability and stability of the relative fixing between the support plate 3 and the tray 1 can be further improved.

Specifically, as shown in fig. 2, only a case where three first stoppers 31 are disposed at intervals along the second direction is illustrated, and other cases may be referred to, which is not particularly limited in the embodiment of the present utility model.

Further, the two first limiting members 31 may be symmetrically disposed at two ends of the support plate 3 along the second direction, or the two first limiting members 31 may be symmetrically disposed at two ends of the support plate 3 along the third direction, or at least three first limiting members 31 may be disposed at uniform intervals along the second direction, or at least three first limiting members 31 may be disposed at uniform intervals along the third direction.

Alternatively, the gaps between two adjacent cells 21 along the first direction may be a first distance, and the gaps between the support plate 3 and the adjacent cells 21 along the first direction may be a second distance, where the first distance is greater than the second distance, so that the expansion gap between the adjacent cells 21 close to the support plate 3 may be reduced, and the safety of the cell assembly 2 is improved.

Further, the first distance may be equal to twice the second distance, so that the expansion distances of the cells 21 in the cell assembly 2 are the same, which is more advantageous for the safety of the cell assembly 2.

Specifically, the adjacent two electric cells 21 are disposed opposite and parallel, and the linear distance between the adjacent two electric cells 21 in the first direction is the first distance. The support plate 3 and the battery cell 21 are opposite and parallel, and the linear distance between the support plate 3 and the battery cell 21 adjacent to the support plate in the first direction is the second distance.

Alternatively, the battery cells 21 disposed at both ends in the first direction are a first battery cell and a second battery cell; in the first direction, the gap between the first cell and the inner wall of the tray 1 is equal to the gap between the second cell and the support plate 3, so that the expansion distances of the first cell and the second cell are the same.

Specifically, the first battery cell and the inner wall of the tray 1 are opposite and parallel, and the linear distance between the first battery cell and the inner wall of the tray 1 in the first direction is a gap between the first battery cell and the inner wall of the tray 1.

Specifically, the second cell and the support plate 3 are opposite and parallel, and the linear distance of the second cell and the support plate 3 in the first direction is the gap between the second cell and the support plate 3.

Alternatively, the support plate 3 and the cells 21 adjacent thereto have a gap of 0.1 to 1mm in the first direction, the expansion capacity of the cells 21 can be satisfied, and the circulation capacity of the cells 21 can be ensured.

The battery pack provided by the embodiment of the utility model at least comprises the following advantages:

In a second aspect, the embodiment of the utility model also discloses electric equipment, which specifically comprises an electric equipment body and the battery pack; the battery pack is arranged on the electricity utilization body and is used for supplying power to the electricity utilization body.

In an embodiment of the present utility model, the electric device includes an electric body and the battery pack provided in any of the above embodiments. The electric equipment comprises, but is not limited to, an energy storage system, an electric vehicle, an electric tool, an unmanned aerial vehicle and the like. The battery pack is used for providing electric energy for the power utilization body.

The electric equipment provided by the embodiment of the utility model at least comprises the following advantages:

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the utility model.

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 above description of the battery pack and the electric equipment provided by the utility model applies specific examples to illustrate the principle and the implementation of the utility model, and the above examples are only used for helping to understand the method and the core idea of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims

1. A battery pack, comprising: the battery cell assembly comprises a plurality of battery cells; wherein,

the support plate is arranged between the battery cell assembly and the inner wall of the tray, and is movably connected with the tray along the first direction so as to adjust the distance between the support plate and the battery cell close to the support plate in the first direction.

2. The battery pack according to claim 1, wherein the support plate is provided with a first stopper, and the tray is provided with a second stopper;

3. The battery pack of claim 2, wherein the tray includes a first side frame and a second side frame disposed opposite each other on both sides of the cell assembly along the first direction, and the second stopper is a connection hole disposed on the second side frame;

4. The battery pack according to claim 3, wherein the first limiting member is a first limiting post, an elongated hole is provided on the first limiting post, and the battery pack further comprises a first connecting member;

the elongated hole extends along the first direction;

5. The battery pack according to claim 4, wherein a positioning member is provided on a side of the second side frame away from the support plate, and a mounting hole opposite to the elongated hole is provided on the positioning member;

6. The battery pack according to claim 3, wherein the first limiting member is a second limiting post, a plurality of through holes are formed in the second limiting post at intervals along the first direction, and the battery pack further comprises a second connecting member;

7. The battery pack of claim 3, wherein the first stop comprises a first stop bar and a second stop bar;

8. The battery pack of claim 2, wherein the number of first restraints comprises at least two;

9. The battery pack according to claim 1, wherein a gap between two adjacent cells in the first direction is a first distance, a gap between the support plate and the adjacent cell in the first direction is a second distance, and the first distance is greater than the second distance.

10. The battery pack of claim 9, wherein the first distance is equal to twice the second distance.

11. The battery pack according to claim 1, wherein the cells disposed at both ends in the first direction are a first cell and a second cell;

12. The battery pack according to claim 1, wherein a gap between the support plate and the cell adjacent thereto in the first direction is 0.1-1mm.

13. A powered device comprising a powered body and the battery pack of any one of claims 1-12;