CN220042152U - End plate device, battery module and battery pack - Google Patents

Abstract

The embodiment of the utility model provides an end plate device, a battery module and a battery pack, and belongs to the technical field of batteries. The end plate device comprises an end plate body and a fixing piece. The end plate body is provided with the fixed orifices along the direction of height of end plate, and the activity is provided with the card and holds the piece in the end plate body. The mounting is assembled in the fixed orifices, and the mounting is used for being fixed in the box of battery package with the battery module, is provided with the cooperation portion on the mounting, after the mounting is fixed with the box of battery package, the card holds the piece and can with cooperation portion joint. The fixing device can better fix the battery module in the battery pack.

Description

End plate device, battery module and battery pack

Technical Field

The utility model relates to the technical field of power batteries, in particular to an end plate device, a battery module and a battery pack.

Background

At present, a battery module structure in a battery pack box body is generally that a plurality of single batteries are combined with an end plate together, and then the single batteries and the end plate are bound together through a plastic steel belt. And the battery module is fixed through the threaded connection of the fixing rod and the box body.

The threaded connection is easy to loosen in the long-term use of the battery pack, so that the installation stability of the battery module is reduced, and the service life of the battery pack is influenced.

Disclosure of Invention

The utility model aims to provide an end plate device, a battery module and a battery pack, which can better fix the battery module in the battery pack.

Embodiments of the present utility model are implemented as follows:

in a first aspect, the present utility model provides an end plate device, applied to fixing a battery module, including an end plate body and a fixing member;

the end plate body is provided with a fixing hole along the height direction of the end plate, and a clamping piece is movably arranged in the end plate body;

the fixing piece is assembled in the fixing hole, the fixing piece is used for fixing the battery module to the box body of the battery pack, the fixing piece is provided with a matching part, and after the fixing piece is fixed with the box body of the battery pack, the clamping piece can be clamped with the matching part.

In an alternative embodiment, the end plate body includes an upper end plate portion and a lower end plate portion, and the fixing hole includes a first fixing hole provided at the upper end plate portion and a second fixing hole provided at the lower end plate portion;

a chute is arranged at the top of the lower end plate part, and one end of the chute is communicated with the second fixing hole;

the clamping piece is movably arranged on the chute;

the upper end plate part is arranged at the top of the lower end plate part, and the first fixing hole corresponds to the second fixing hole;

the matching part is a clamping groove arranged on the fixing piece;

the fixing piece sequentially penetrates through the first fixing hole and the second fixing hole, and the clamping piece can be clamped in the clamping groove after moving.

In an alternative embodiment, the end plate device further includes an elastic member, an abutment block is disposed on a side of the chute away from the second fixing hole, and the elastic member is disposed between the clamping member and the abutment block.

In an alternative embodiment, the clamping member includes a clamping portion and an operating portion that are connected to each other, a side wall of the lower end plate portion is provided with an extending groove that communicates with the sliding groove, the clamping portion is disposed in the sliding groove, and the operating portion extends to an outer side of the lower end plate portion through the extending groove.

In an alternative embodiment, the fixing piece comprises a fixing portion and a head portion arranged at the end of the fixing portion, the head portion is prismatic, the fixing portion is cylindrical, a thread is arranged at one end, away from the head portion, of the fixing portion, the thread is used for being connected with a box body of the battery pack, and the clamping groove is annularly arranged.

In a second aspect, the present utility model provides a battery module comprising a single cell, a strap, and two end plate devices according to any one of the foregoing embodiments, the end plate devices being disposed on both sides of the single cell and being fixed by the strap.

In a third aspect, the present utility model provides a battery pack, including a case and the battery module according to the foregoing embodiment, where the battery module is disposed in the case, and the fixing member is connected with the case.

In an alternative embodiment, the box body comprises a box body and a cross beam arranged in the box body;

the fixing piece is fixedly connected with the cross beam.

In an alternative embodiment, the cross beam is provided with a fixing post, the fixing post extends into the fixing hole, and the fixing piece is connected with the fixing piece.

In an alternative embodiment, a threaded hole is formed in the end of the fixing column, and the fixing piece is connected with the fixing column through the threaded hole; and/or the number of the groups of groups,

the fixed column and the cross beam are integrally formed.

The end plate package, the battery module and the battery pack provided by the embodiment of the utility model have the beneficial effects that:

according to the utility model, the clamping piece is movably arranged on the end plate body, and the matching part is arranged on the fixing piece, so that when the battery module and the box body are assembled, the fixing piece can be used for penetrating the fixing hole to be connected with the box body, and then the clamping piece is clamped with the matching part, so that the fixing failure between the fixing piece and the box body can be avoided, and the fixing stability of the battery module in the box body 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 embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic structural diagram of an end plate device according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of an end plate body in the end plate device according to the embodiment of the present utility model;

fig. 4 is a schematic structural view of a fixing member in an end plate device according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of an assembly structure of a clamping member in an end plate device according to an embodiment of the present utility model;

fig. 6 is an enlarged schematic view at a in fig. 5.

Icon 100-end plate device; 110-fixing piece; 111-mating part; 113-a clamping groove; 115-a fixing part; 117-head; 130-an end plate body; 131-fixing holes; 132-an upper endplate portion; 133-a lower end plate portion; 135-a first fixing hole; 137-a second fixing hole; 139-sliding grooves; 141-an abutment block; 143-an extension groove; 150-a clamping piece; 151-a clamping part; 153-an operation section; 155-bayonet; 170-an elastic member; 300-battery module; 310-single battery; 330-strap; 500-battery pack; 510-a box body; 511-a box body; 513-a cross beam; 515-fixing columns; 517-threaded holes.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected 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 be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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.

Referring to fig. 1, the present embodiment provides a battery pack 500, and the battery pack 500 includes a case 510 and a battery module 300. The battery module 300 includes a unit cell 310, a strap 330, and two end plate devices 100, and the end plate devices 100 are disposed at both sides of the unit cell 310 and fixed by the strap 330. The case 510 includes a case body 511 fixedly mounted to a cross member 513 within the case body 511. The interval between the cross members 513 corresponds to the interval between the end plate devices 100 at both ends of the battery module 300. The end plate arrangement 100 is connected to a cross beam 513.

Referring to fig. 2 to 4, in the present embodiment, the end plate device 100 includes an end plate body 130 and a fixing member 110. The end plate body 130 is provided with a fixing hole 131 along the height direction of the end plate, and the end plate body 130 is movably provided with a clamping member 150. The fixing member 110 is assembled in the fixing hole 131, the fixing member 110 is connected to the cross beam 513, the fixing member 110 is provided with the fitting portion 111, and the holding member 150 is engaged with the fitting portion 111.

In this embodiment, the clamping member 150 is movably disposed on the end plate body 130, and the mating portion 111 is disposed on the fixing member 110, so that when the battery module 300 and the case 510 are assembled, the fixing member 110 can be used to penetrate through the fixing hole 131 and connect with the case 510, and the fixing member 150 is clamped with the mating portion 111, so that a failure in fixing between the fixing member 110 and the case 510 can be avoided, and the stability of the battery module 300 in the case 510 of the battery pack 500 is improved.

In this embodiment, the fixing member 110 includes a fixing portion 115 and a head portion 117 disposed at an end of the fixing portion 115, the head portion 117 is prismatic, the fixing portion 115 is cylindrical, one end of the fixing portion 115 away from the head portion 117 is provided with threads for connecting with a case 510 of the battery pack 500, and the clamping groove 113 is disposed in a ring shape.

In other embodiments of the present utility model, a plurality of slots may be spaced along the height of the fixing member to meet different requirements.

The present embodiment provides the head 117 of the fixing member 110 in a prismatic shape, so that the fixing member 110 can be easily fastened by a tool. The optical axis is located above the clamping groove 113, and the screw thread structure is located below the clamping groove 113.

With continued reference to fig. 1, in this embodiment, the cross beam 513 is provided with a fixing post 515, the fixing post 515 extends into the fixing hole 131, and the fixing member 110 is connected to the fixing member 110. The fixing post 515 is integrally welded to the cross beam 513. The end of the fixed post 515 is provided with a threaded hole 517, and the stator is connected with the fixed post 515 through the threaded hole 517.

The present embodiment realizes the fixation of the battery module 300 by the cooperation of the fixing member 110 and the screw hole 517, so that the depth of the screw hole 517 of the fixing post 515 can be ensured to be deeper. The fixing member 110 is clamped by the clamping member 150, so that the fixing member 110 cannot move relative to the end plate device 100, and loosening of the threaded connection can be prevented.

In this embodiment, the height of the fixing post 515 is greater than one third of the height of the end plate assembly, so that the fixing member 110 can be more firmly assembled.

Of course, in other embodiments of the present utility model, external threads may be provided on the exterior of the mount 110, with the threaded bore 517 provided on the mount 110. However, this may damage external threads when the battery module 300 is mounted, thereby affecting the assembly therebetween.

Referring to fig. 3, 5 and 6, in the present embodiment, the end plate body 130 includes an upper end plate 132 and a lower end plate 133, and the fixing hole 131 includes a first fixing hole 135 provided in the upper end plate 132 and a second fixing hole 137 provided in the lower end plate 133. A chute 139 is provided at the top of the lower end plate portion 133, and one end of the chute 139 communicates with the second fixing hole 137. The retaining member 150 is movably disposed in the chute 139. The upper end plate portion is disposed on top of the lower end plate portion 133, and the first fixing hole 135 corresponds to the second fixing hole 137. The engaging portion 111 is a locking groove 113 provided in the fixing member 110. The fixing member 110 sequentially passes through the first fixing hole 135 and the second fixing hole 137, and the clamping member 150 can be clamped in the clamping groove 113 after moving.

The present embodiment provides the upper and lower end plate portions 132 and 133 with the end plate body 130 and the slide groove 139 provided on top of the lower end plate portion 133, such that the upper end plate portion 132 defines the upper portion of the catching portion 151 in the mounted case, thereby allowing the catching portion 151 to slide between the end plate portion and the lower end plate portion 133. The top of the lower end plate 133 is provided with a sliding slot 139 communicating with the second fixing hole 137, so that the clamping member 150 is disposed in the sliding slot 139, and when the fixing member 110 is in place, the clamping member 150 can be clamped in the clamping slot 113, so as to limit the movement of the fixing member 110 relative to the end plate body 130.

In this embodiment, the end plate device 100 further includes an elastic member 170, an abutment block 141 is disposed on a side of the sliding groove 139 away from the second fixing hole 137, and the elastic member 170 is disposed between the clamping member 150 and the abutment block 141.

The elastic member 170 is provided in this embodiment, so that the clamping member 150 can be continuously clamped in the clamping groove 113 by using the elastic force of the elastic member 170.

Referring to fig. 3, 5 and 6, in the present embodiment, the elastic member 170 is a spring. One end of the clamping piece 150 is connected with the spring unit, a blind hole is formed in the clamping piece 150, a supporting rod is arranged on the abutting block 141, the spring is sleeved on the supporting rod, and one end of the supporting rod is inserted in the blind hole and can slide along the blind hole. The end of the clamping piece 150 far away from the spring is provided with a bayonet 155, and the inner diameter of the bayonet 155 is the same as the diameter of the position where the clamping groove 113 is fixedly arranged.

In the present embodiment, the holding member 150 includes a holding portion 151 and an operating portion 153 connected to each other, the side wall of the lower end plate portion 133 is provided with an extending groove 143 communicating with the slide groove 139, the holding portion 151 is provided to the slide groove 139, and the operating portion 153 extends to the outside of the lower end plate portion 133 through the extending groove 143. The bayonet 155 is provided on the holding portion 151, and the spring abuts against the holding portion 151.

In the present embodiment, the upper end plate 132 and the lower end plate 133 are integrally formed by welding, but in other embodiments of the present utility model, the upper end plate and the lower end plate may be connected by a snap-fit or the like.

Referring to fig. 3, 5 and 6, in the present embodiment, two fixing holes 131 are provided on the end plate body 130, and the number of the fixing members 110 and the clamping members 150 is two, which are installed on the end plate body 130 in a one-to-one correspondence.

Specifically, when the battery pack 500 is assembled, the single battery cells and the end plate device 100 are bound by the binding bands 330 to form the battery module 300. The assembled battery module 300 is then disposed in the case 510, and the bottom of the fixing post 515 having the end plate body 130 is inserted into the fixing hole 131. Then, the fixing member 110 is inserted into the fixing hole 131 from above the end plate body 130, and the operation portion 153 is shifted to retract the clamping member 150, so that the fixing member 110 can pass over the clamping member 150. The fixing piece 110 is screwed by a tool, and the clamping groove 113 corresponds to the clamping piece 150, so that the clamping piece 150 can be inserted into the clamping groove 113 under the action of a spring, and the limiting of the fixing piece 110 is realized, so that the loosening of the fixing piece 110 is avoided.

In summary, the working principles and beneficial effects of the end plate device 100, the battery module 300 and the battery pack 500 provided in the embodiment of the present utility model include:

according to the utility model, the clamping member 150 is movably arranged on the end plate body 130, and the matching part 111 is arranged on the fixing member 110, so that when the battery module 300 and the box 510 are assembled, the fixing member 110 can be used for penetrating the fixing hole 131 to be connected with the box 510, and then the clamping member 150 is clamped with the matching part 111, so that the fixing failure between the fixing member 110 and the box 510 can be avoided, and the stability of the battery module 300 in the box 510 of the battery pack 500 is improved.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An end plate device is applied to fixing of a battery module and is characterized by comprising an end plate body and a fixing piece;

the end plate body is provided with a fixing hole along the height direction of the end plate, and a clamping piece is movably arranged in the end plate body;

the fixing piece is assembled in the fixing hole, the fixing piece is used for fixing the battery module to the box body of the battery pack, the fixing piece is provided with a matching part, and after the fixing piece is fixed with the box body of the battery pack, the clamping piece can be clamped with the matching part.

2. The endplate apparatus of claim 1, wherein the endplate body includes an upper endplate portion and a lower endplate portion, the securing holes including a first securing hole provided in the upper endplate portion and a second securing hole provided in the lower endplate portion;

a chute is arranged at the top of the lower end plate part, and one end of the chute is communicated with the second fixing hole;

the clamping piece is movably arranged on the chute;

the upper end plate part is arranged at the top of the lower end plate part, and the first fixing hole corresponds to the second fixing hole;

the matching part is a clamping groove arranged on the fixing piece;

the fixing piece sequentially penetrates through the first fixing hole and the second fixing hole, and the clamping piece can be clamped in the clamping groove after moving.

3. The end plate device according to claim 2, further comprising an elastic member, wherein an abutment block is provided on a side of the chute away from the second fixing hole, and the elastic member is provided between the retaining member and the abutment block.

4. The end plate device according to claim 2, wherein the holding member includes a holding portion and an operating portion connected to each other, a side wall of the lower end plate portion is provided with an extending groove communicating with the slide groove, the holding portion is provided in the slide groove, and the operating portion extends to an outside of the lower end plate portion through the extending groove.

5. The end plate device according to claim 2, wherein the fixing member includes a fixing portion and a head portion disposed at an end portion of the fixing portion, the head portion is prismatic, the fixing portion is cylindrical, one end of the fixing portion, which is away from the head portion, is provided with threads for connection with a case of the battery pack, and the clamping groove is disposed in a ring shape.

6. A battery module comprising a single cell, a strap, and two end plate devices according to any one of claims 1-5, said end plate devices being disposed on either side of said single cell and secured by said strap.

7. A battery pack, characterized by comprising a case and the battery module of claim 6, wherein the battery module is disposed in the case, and the fixing member is connected with the case.

8. The battery pack of claim 7, wherein the case includes a case body and a cross member disposed within the case body;

the fixing piece is fixedly connected with the cross beam.

9. The battery pack of claim 8, wherein the cross member is provided with a fixing post, the fixing post extends into the fixing hole, and the fixing member is connected with the fixing member.

10. The battery pack according to claim 9, wherein the fixing post is provided with a screw hole at an end thereof, and the fixing member is connected with the fixing post through the screw hole; and/or the number of the groups of groups,

the fixed column and the cross beam are integrally formed.