CN215771342U

CN215771342U - Battery pack

Info

Publication number: CN215771342U
Application number: CN202122219196.1U
Authority: CN
Inventors: 曲凡多
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-02-08
Anticipated expiration: 2031-09-14

Abstract

The utility model relates to the technical field of power batteries, and discloses a battery pack. The battery pack includes a case, a carrier plate, a battery assembly and a frame. The carrier plate is placed in the box; the battery assembly is placed on the carrier plate, and the battery assembly includes a plurality of battery modules arranged along the first direction, and each battery module includes a mounting frame and a plurality of battery cells fixed on the mounting frame The frame is placed on the carrier board and connected with the carrier board, the frame includes a connector and an end plate, the connector extends along the first direction, and the battery assembly is provided with connectors on both sides of the second direction, and the first direction is perpendicular to the second direction. The first direction and the second direction are both parallel to the carrying plate, both ends of the battery assembly along the first direction are provided with end plates, and the two sides of the end plates are connected to two connecting pieces respectively. The utility model can replace the box body of the battery pack independently, which improves the maintenance efficiency of the battery pack and reduces the maintenance cost.

Description

Battery pack

Technical Field

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

Background

Power batteries are widely used in various fields. The battery pack arranged inside the electric vehicle comprises a box body and a plurality of battery modules, and the battery modules are fixed inside the box body respectively. The vehicle is at the in-process of marcing, and the battery package box receives vibrations fragile, when changing the box, need pull down battery module one by one, just can change the box, and the maintenance duration is longer, and is inefficiency.

Based on this, a battery pack is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery pack, which can realize the separation of the whole battery assembly from a box body, improve the maintenance efficiency of the battery pack and reduce the maintenance cost.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a battery pack, comprising:

a box body;

the bearing plate is arranged in the box body;

the battery assembly is arranged on the bearing plate and comprises a plurality of battery modules which are arranged along a first direction, and each battery module comprises a mounting rack and a plurality of battery cells fixed on the mounting rack;

the frame is arranged on the bearing plate and is connected with the bearing plate, the frame comprises a connecting piece and an end plate, the connecting piece is extended along the first direction, the battery pack is arranged on the two sides of the second direction, the connecting piece is arranged on the two sides of the battery pack along the second direction, the first direction is perpendicular to the second direction, the first direction is parallel to the second direction, the battery pack is arranged on the two ends of the first direction, the end plate is arranged on the two ends of the end plate, and the two ends of the end plate are connected with the connecting piece respectively.

Optionally, the connecting piece includes along pole portion that first direction extends and set up the spacing portion at pole portion both ends, spacing portion is followed second direction protrusion in pole portion orientation one side of end plate, the bulge of spacing portion connect in the end plate.

Optionally, the protruding portion of the limiting portion is attached to one side of the end plate, which is opposite to the battery module, and is connected with the end plate.

Optionally, the protruding portion of the limiting portion is connected to the end portion of the end plate facing the connecting member, and the limiting portion and the end plate are integrally disposed.

Optionally, the connecting piece further comprises a connecting protrusion, the connecting protrusion is arranged on one side of the limiting portion opposite to the rod portion, and a box body connecting hole is formed in the connecting protrusion.

Optionally, a plurality of battery assemblies are arranged along the second direction, and the battery assemblies and the connecting pieces are alternately arranged; and on the connecting piece between two adjacent battery components, the limiting part is connected with the two end plates.

Optionally, the box body comprises a side frame and a box bottom plate, and the side frame and the box bottom plate define an accommodating cavity for accommodating the battery assembly, the bearing plate and the frame.

Optionally, the outer side wall of the side frame is convexly provided with a connecting edge.

Optionally, the box further includes a frame connector, the frame connector is disposed in the accommodating cavity, the frame connector is connected to the box bottom plate and/or the side frame, and the frame connector is detachably connected to the frame.

Optionally, the bearing plate is a liquid cooling plate, and a heat conduction layer is arranged between the liquid cooling plate and the battery module.

The utility model has the beneficial effects that:

the battery pack provided by the utility model comprises the box body, the frame, the bearing plate and the battery component, wherein the frame is connected with the bearing plate, the battery component is arranged in the frame, and the bearing plate plays a role of bearing the battery component, so that the battery component can be separated from the box body by lifting the frame when the box body of the battery pack is damaged, the maintenance efficiency of the battery pack is improved, and the maintenance cost is reduced. And including a plurality of battery module in the battery pack for a plurality of battery modules are constituteed earlier to electric core, constitute battery pack again, and the electric core quantity of battery module is less, and the size is less, and the production and processing and the maintenance of being convenient for, when electric core in one of them battery module became invalid moreover, only need change the battery module at electric core place can, avoided changing whole battery pack, reduced the maintenance cost.

Drawings

Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery module according to an embodiment of the utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is an exploded view of a battery pack according to an embodiment of the present invention;

FIG. 6 is a partial enlarged view at B in FIG. 5;

fig. 7 is an exploded view of a battery pack according to a second embodiment of the present invention;

fig. 8 is a partial enlarged view at C in fig. 7.

In the figure:

1. a battery module; 11. a connecting arm; 111. connecting lugs; 112. a connecting edge; 113. folding edges; 12. an electric core;

2. an end plate;

3. a connecting member; 31. a rod portion; 32. a limiting part; 321. an end plate connection hole; 322. the rod part is connected with the hole; 33. a connecting projection; 331. a box body connecting hole;

4. a carrier plate; 41. a liquid inlet; 42. a liquid outlet;

5. a box body; 51. a side frame; 511. connecting the convex edge; 52. a box bottom plate; 53. a frame connector.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

Example one

The present embodiment provides a battery pack. As shown in fig. 1 to 2, the battery pack specifically includes: the battery pack comprises a box body 5, a bearing plate 4, a battery pack and a frame. The bearing plate 4 is arranged in the box body 5; the battery assembly is arranged on the bearing plate 4 and comprises a plurality of battery modules 1 arranged along a first direction, each battery module 1 comprises a mounting frame and an electric core assembly fixed on the mounting frame, and the electric core assembly comprises a plurality of electric cores 12 arranged along the first direction; the frame is arranged in on loading board 4 and is connected with loading board 4, and the frame includes connecting piece 3 and end plate 2, and connecting piece 3 extends along the first direction, and battery pack all sets up connecting piece 3 along the both sides of second direction, first direction perpendicular to second direction, and first direction and second direction all are on a parallel with loading board 4, and battery pack all sets up end plate 2 along the both ends of first direction, and the both ends of end plate 2 are connected in two connecting pieces 3 respectively. That is, the two end plates 2 and the two connecting members 3 can enclose a frame-like structure in which the battery assembly is placed. In this embodiment, the first direction and the second direction are both horizontal directions. And the battery assembly includes three battery modules 1.

The battery pack that this embodiment provided, including box 5, frame, loading board 4 and battery pack, the frame is connected with loading board 4, and battery pack arranges in the frame, and loading board 4 plays the effect of bearing battery pack for box 5 of battery pack can realize that battery pack breaks away from box 5 through mentioning the frame when damaging, has improved the maintenance efficiency of battery pack, has reduced the maintenance cost. And including a plurality of battery module 1 in the battery pack for a plurality of battery module 1 are constituteed earlier to electric core 12, constitute battery pack again, and electric core 12 quantity of battery module 1 is less, and the size is less, and the production and maintenance of being convenient for, when electric core 12 in one of them battery module 1 became invalid, only need change electric core 12 place battery module 1 can, avoided changing whole battery pack, reduced the maintenance cost.

For ease of understanding, the first direction and the second direction are identified in fig. 1. In fig. 1, the positive direction or the negative direction of the a direction is the first direction, and the positive direction or the negative direction of the b direction is the second direction.

In this embodiment, as shown in fig. 3-4, the mounting bracket includes two linking arms 11 that set up along the second direction interval, linking arm 11 extends along the first direction, at least one side of every electric core 12 along the second direction is connected with linking arm 11, and the length of linking arm 11 is the same with the length of electric core subassembly, the tip of linking arm 11 is the same with the tip parallel and level of electric core subassembly promptly, when making the terminal surface laminating of two adjacent battery module 1, laminate each other between electric core 12 of two battery module 1, the volume of battery subassembly has been reduced, energy density has been improved. The end of the battery module 1 is also bonded to the end plate 2. The connecting arm 11 is connected with the connecting piece 3, so that the stability of the battery pack structure is improved.

In other embodiments, a supporting connecting arm can be further connected between the two connecting arms 11, the supporting connecting arm can connect the two connecting arms 11 and can support the cell assembly, the mounting rack is in a U shape, the opening of the mounting rack penetrates through the two ends of the mounting rack along the first direction, and the cell assembly is arranged in the opening. The connecting arms 11 are provided with connecting lugs 111 at the opposite sides, and the connecting lugs 111 are connected with the connecting pieces 3.

Each connecting arm 11 is provided with a plurality of connecting lugs 111, in this embodiment, a connecting edge 112 is convexly arranged on one side of each connecting arm 11, the side of each connecting arm is opposite to each other, the connecting edge 112 extends along the first direction, and three connecting lugs 111 are convexly arranged on the connecting edge 112.

Specifically, the top cover of the battery cell 12 is disposed toward the upper side, and two poles of the battery cell 12 are disposed on the top cover. As shown in fig. 4, a hem 113 is provided on one side of the connecting arm 11 facing the battery cell 12, and a bottom surface of the hem 113 is attached to a top cover of the battery cell 12, so as to limit the position of the battery cell 12.

In this embodiment, two sets of cell assemblies are disposed inside one battery module 1, the two sets of cell assemblies are arranged along the second direction, each cell assembly includes eight or ten cells 12 arranged along the first direction, and a partition board is disposed between the two cell assemblies. In other embodiments, the number of the core assemblies in each battery module 1 and the number of the battery cells 12 in the core assemblies may be adaptively adjusted, and are not limited herein.

Specifically, as shown in fig. 1 and 5, the box body 5 includes a side frame 51 and a bottom plate 52, the side frame 51 is quadrilateral, and the side frame 51 and the bottom plate 52 enclose an accommodating cavity for accommodating the battery assembly, the loading plate 4 and the frame. The outer side wall of the side frame 51 is convexly provided with a connecting convex edge 511. The connecting convex edge 511 is arranged, so that the battery pack can be conveniently connected with a chassis or other external structures of a vehicle, and the connection convenience is improved. Specifically, the connecting flange 511 is provided with a through hole for facilitating connection with a vehicle using a bolt.

Preferably, the box body 5 further comprises a box cover, and the box cover is plugged on one side of the side frame 51 far away from the box bottom plate 52, so that the protection effect of the box body 5 is further improved, and the practicability is improved. In this embodiment, the side frame 51 is welded to the bottom plate 52 or detachably connected thereto by bolts, and the side frame 51 is detachably connected to the box cover by bolts or snaps.

Optionally, as shown in fig. 5, the box 5 further includes a frame connector 53, the frame connector 53 is disposed in the accommodating cavity, the frame connector 53 is connected to the box bottom plate 52 and/or the side frame 51, and the frame connector 53 is detachably connected to the frame.

In this embodiment, the frame connecting member 53 is disposed at the connection position between the bottom plate 52 and the side frame 51, and the frame connecting member 53 is connected to the bottom plate 52 and the side frame 51, so that the position of the frame connecting member 53 in the box body 5 is stable, and the displacement of the frame connecting member 53 caused by the vibration of the battery pack is avoided, thereby ensuring the position stability of the battery assembly. In other embodiments, the frame connecting member 53 may be connected to the bottom plate 52 or the side frame 51, and the position of the frame connecting member 53 may be adaptively adjusted, which is not limited herein.

Further, the bearing plate 4 is a liquid cooling plate and used for dissipating heat of the battery assembly, and safety of the battery pack is improved. In addition, the mounting frame is provided as two unconnected connecting arms 11 in this embodiment, so that the heat transfer efficiency between the battery cell 12 and the bearing plate 4 is improved. Be provided with the heat-conducting layer between liquid cooling board and the battery module 1, improved the heat transfer efficiency between liquid cooling board and the battery module 1 to improve the radiating efficiency of electric core 12, guaranteed the security of battery module, do not have the bonding function moreover, the battery module 1 of being convenient for breaks away from battery pack, does benefit to the maintenance. The structure of the carrier plate 4 is prior art and will not be described herein. In this embodiment, the liquid-cooled plate is connected to the connecting piece 3, in particular fastened by means of a fastening piece.

In other embodiments, an adhesive layer is disposed between the carrier plate 4 and the battery module 1, so as to further improve the structural stability and structural strength of the battery assembly. Preferably, be provided with heat conduction silica gel layer between loading board 4 and the battery module 1, compromise the function of heat conduction and bonding simultaneously.

Specifically, as shown in fig. 1 and 5, the liquid cooling plate is further provided with a liquid inlet 41 and a liquid outlet 42, so that the cooling liquid inside the liquid cooling plate can flow, and the heat dissipation effect on the battery module 1 is further improved.

Preferably, as shown in fig. 5 and 6, the connecting member 3 includes a rod portion 31 extending along the first direction and limiting portions 32 disposed at two ends of the rod portion 31, the rod portion 31 is disposed at two sides of the battery assembly along the second direction, the limiting portions 32 protrude from one side of the rod portion 31 facing the end plate 2 along the second direction, and protruding portions of the limiting portions 32 are connected to the end plate 2. Above-mentioned structure sets up, and when electric core 12 expansion deformation, spacing portion 32 can restrict the deformation of end plate 2, has guaranteed the stability of above-mentioned frame column structure to restricted electric core 12's deformation, reduced other electric core 12 and received the extrusion and the possibility of inefficacy, improved durability and life. In this embodiment, the limiting portion 32 is separated from the end plate 2, and the protruding portion of the limiting portion 32 is attached to the end plate 2 opposite to the battery module 1 and connected to the end plate 2.

In the present embodiment, the mounting bracket is connected to the rod portion 31, and in particular, the engaging lug 111 is connected to the rod portion 31. More specifically, the engaging lug 111 is provided with a through hole along the vertical direction, and the engaging lug 111 is disposed above the rod portion 31 and connected to the rod portion 31 by a bolt.

In the present embodiment, the stopper portion 32 is a vertically disposed plate shape and is perpendicularly connected to the rod portion 31. The limiting portion 32 is provided with an end plate connection hole 321 along the first direction, so that the limiting portion 32 can be connected with the end plate 2 through a bolt. The limiting parts 32 of the connecting pieces 3 on the two sides of the same battery component are arranged in a protruding mode, namely the two sides of the end plate 2 are connected with the limiting parts 32 of the two connecting pieces 3 respectively, and the stability of the frame-shaped structure is further guaranteed.

Preferably, as shown in fig. 6, the connecting member 3 further includes a connecting protrusion 33, the connecting protrusion 33 is disposed on a side of the limiting portion 32 opposite to the rod portion 31, and a case connecting hole 331 is formed on the connecting protrusion 33. The case connection hole 331 is provided so that the connection member 3 can be connected to the case 5 through a bolt, specifically to the frame connection member 53, and the practicability is improved. In this embodiment, the connecting protrusion 33 is block-shaped and protrudes from the limiting portion 32, and the case connecting hole 331 is a through hole and is opened along the vertical direction. In other embodiments, the shape of the coupling protrusion 33 and the position of the case coupling hole 331 may be adaptively adjusted, and are not limited herein.

Preferably, the rod portion 31, the limiting portion 32 and the connecting protrusion 33 of the connecting member 3 are made of metal, and are arranged in an integrated structure, so that the production and the processing are convenient. In other embodiments, the rod portion 31, the limiting portion 32 and the connecting protrusion 33 may be connected by welding, which is not limited herein.

In the present embodiment, a plurality of battery modules are provided along the second direction, and the battery modules and the connecting members 3 are alternately arranged; on the connecting piece 3 between two adjacent battery packs, the limiting part 32 is connected with two end plates 2. Specifically, two ends of the limiting portion 32 along the second direction respectively protrude from two sides of the rod portion 31, and are connected to the two end plates 2. Due to the structural arrangement, the same connecting piece 3 can be respectively connected with the two end plates 2, so that the two frame-shaped structures can be conveniently connected, two battery assemblies can be conveniently connected, the number of the battery cores 12 in the battery pack is increased, and the practicability of the battery pack is improved; the number of the connecting pieces 3 between the two battery components is also reduced, so that the number of the connecting structures in the battery pack is reduced, and the cost is reduced; the weight of the battery pack is reduced, the energy density is improved, and the practicability of the battery pack is improved. Specifically, on connecting piece 3 between two battery pack, the both ends of spacing portion 32 along the second direction all bulge in pole portion 31 setting for the tip of connecting piece 3 is "T" type, and the both ends of spacing portion 32 are connected respectively in two end plates 2, have reduced the quantity of connecting piece 3, have also reduced the interval between two adjacent battery pack, have further improved the energy density of battery package.

In some embodiments, the limiting portions 32 protrude from the rod portion 31 only on one side facing the end plate 2 on two connecting members 3 on two sides of the plurality of battery packs, i.e., on two connecting members 3 on two sides of the frame, so that the end portions of the connecting members 3 are in an "L" shape, thereby further reducing the size of the frame and thus reducing the volume of the box 5.

Preferably, the end plate 2 extends along the second direction, the thickness of the end plate 2 is gradually increased from the middle to the two sides along the second direction, when the electric core 12 generates expansion deformation, the rigidity of the middle of the end plate 2 is lower, the deformation is larger, the thicker parts at the two sides of the end plate 2 are connected to the limiting part 32, the rigidity is higher, the deformation is smaller, the reliability of the connection between the end plate 2 and the connecting piece 3 is further ensured, and the stability of the frame-shaped structure is further ensured. In this embodiment, one side of the end plate 2 opposite to the electric core 12 is an arc-shaped surface, which is convenient for processing.

Example two

The present embodiment provides a battery pack, and the structure of the battery pack provided in the present embodiment is basically the same as that of the first embodiment, and only the structural configuration of the frame is different, and the structure that is the same as that of the first embodiment is not described again in the present embodiment.

Preferably, as shown in fig. 7 to 8, the end of the protruding portion of the stopper portion 32 is connected to the end of the end plate 2 facing the connector 3, that is, the end of the protruding portion facing the end plate 2 is connected to the end of the end plate 2 facing the corresponding connector 3 in the second direction, and the stopper portion 32 is provided integrally with the end plate 2. The structure is convenient for processing, the rod part 31 is formed into a longitudinal beam of the frame, and the limiting part 32 and the end plate 2 are formed into a transverse beam of the frame. Furthermore, the limiting portion 32 is provided with a rod connection hole 322, which is detachably connected with the rod portion 31 through a bolt. Still further, the limiting part 32 and the end plate 2 are made of section bars.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery pack, comprising:

a box body (5);

the bearing plate (4) is arranged in the box body (5);

the battery assembly is arranged on the bearing plate (4), the battery assembly comprises a plurality of battery modules (1) which are arranged along a first direction, and each battery module (1) comprises a mounting rack and a plurality of battery cores (12) fixed on the mounting rack;

the frame is arranged on the bearing plate (4) and is connected with the bearing plate (4), the frame comprises a connecting piece (3) and an end plate (2), the connecting piece (3) is extended along a first direction, the battery pack is arranged on two sides of a second direction, the connecting piece (3) is perpendicular to the second direction, the first direction is parallel to the bearing plate (4) and the second direction, the battery pack is arranged on two ends of the first direction, the end plate (2) is arranged on two ends of the end plate (2), and the two ends of the end plate (2) are connected with the connecting piece (3) respectively.

2. The battery pack according to claim 1, wherein the connecting member (3) includes a rod portion (31) extending in the first direction and stopper portions (32) provided at both ends of the rod portion (31), the stopper portions (32) protruding from the rod portion (31) toward the end plate (2) in the second direction, and protruding portions of the stopper portions (32) are connected to the end plate (2).

3. The battery pack according to claim 2, wherein the protruding portion of the stopper portion (32) is attached to the end plate (2) on the side opposite to the battery module (1) and connected to the end plate (2).

4. The battery pack according to claim 2, wherein the protruding portion of the stopper portion (32) is connected to an end portion of the end plate (2) facing the connecting member (3), and the stopper portion (32) is provided integrally with the end plate (2).

5. The battery pack according to claim 2, wherein the connecting member (3) further comprises a connecting protrusion (33), the connecting protrusion (33) is disposed on a side of the limiting portion (32) opposite to the rod portion (31), and a case connecting hole (331) is formed in the connecting protrusion (33).

6. The battery pack according to claim 2, wherein the battery modules are provided in plurality in the second direction, the battery modules being arranged alternately with the connecting members (3); on the connecting piece (3) between two adjacent battery pack, spacing portion (32) with two end plate (2) are connected.

7. Battery pack according to any of claims 1 to 6, characterized in that the casing (5) comprises side frames (51) and a bottom plate (52), the side frames (51) and the bottom plate (52) enclosing a receiving cavity for receiving the battery assembly, the carrier plate (4) and the frame.

8. The battery pack according to claim 7, wherein the outer side wall of the side frame (51) is protrusively provided with a coupling flange (511).

9. The battery pack according to claim 7, wherein the case (5) further comprises a frame connector (53), the frame connector (53) is disposed in the receiving cavity, the frame connector (53) is connected to the bottom plate (52) and/or the side frame (51), and the frame connector (53) is detachably connected to the frame.

10. The battery pack according to any one of claims 1 to 6, wherein the carrier plate (4) is a liquid-cooled plate, and a heat conducting layer is provided between the liquid-cooled plate and the battery module (1).