CN213601974U

CN213601974U - Battery module and battery pack

Info

Publication number: CN213601974U
Application number: CN202022755566.9U
Authority: CN
Inventors: 邓江南; 杜俊丰; 刘晨南; 钟君焐; 姜斌
Original assignee: Dongguan Tafel New Energy Technology Co Ltd; Jiangsu Tafel New Energy Technology Co Ltd; Jiangsu Tafel Power System Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-07-02
Anticipated expiration: 2030-11-25

Abstract

The utility model belongs to the technical field of lithium ion battery, concretely relates to battery module, including the casing with hold in a plurality of electricity core monomer of casing, the central point of casing both sides puts and is provided with the mounting, the mounting is in for dislocation set on the width direction of casing. Compared with the prior art, the fixing piece is arranged at the central positions of the two sides of the shell, so that the fixed stress points are added at the middle part of the shell, the influence of stress on the middle part of the battery module in the long-term use process is reduced, the deformation degree is reduced, the connection reliability of the battery module is greatly improved, and the safety performance of the battery pack is improved; in addition, because the mounting is dislocation set on the width direction of casing, consequently, battery module is at the in-process of assembly, and adjacent mounting can overlap, has reduced the occupation to the width space, has improved the utilization ratio in space. Furthermore, the utility model also provides a battery package.

Description

Battery module and battery pack

Technical Field

The utility model belongs to the technical field of lithium ion battery, concretely relates to battery module and battery package.

Background

The lithium ion battery has the advantages of high energy density, large working voltage, long cycle service life, no memory and the like, so that the lithium ion battery is widely applied to various industries, particularly the new energy automobile industry.

At present, the lithium ion battery cell is generally packaged into a battery module in a series/parallel connection mode in the industry, the battery module supplies power to an electric automobile through the battery pack, and along with the generation of a blade battery, the battery module at the present stage is also developed towards a larger and longer direction, so that the space of the battery pack can be saved, and the whole weight of the battery pack can be reduced. However, the long battery module in the prior art still has the following defects: because the length of battery module has obtained the increase by a wide margin, in long-term use moreover, the intermediate position of battery module receives the influence of stress and takes place the phenomenon of deformation easily, has brought certain potential safety hazard for the use of battery package.

In view of the above, there is a need for further improvements to the above prior art to meet practical production needs.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pair of battery module has solved the defect that exists among the above-mentioned prior art effectively.

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

the utility model provides a battery module, include the casing and hold in a plurality of electricity core monomer of casing, the central point of casing both sides puts and is provided with the mounting, the mounting is in for the dislocation set in the width direction of casing.

As right the utility model discloses in the improvement of battery module, the mounting is provided with connect the via hole, connect the via hole and be used for connecting fastener.

As right the utility model discloses in the improvement of battery module, the mounting is any one of rectangle, triangle-shaped, trapezoidal and arc structure.

As right the utility model discloses in the improvement of battery module, still include the support, the support laminating set up in the casing, the both ends of support respectively with the casing both sides the mounting locking.

As right the utility model discloses in the improvement of battery module, the casing includes both ends open-ended framework and is fixed in the end plate at framework both ends, be provided with the mounting hole on the end plate, the framework includes first connecting plate and second connecting plate, first connecting plate with the second connecting plate surrounds and forms the framework.

As right the utility model discloses in the improvement of battery module, two upper and lower surfaces of mounting respectively with two upper and lower surfaces of end plate set up on same horizontal plane.

As to the improvement of the battery module described in the present invention, the first connecting plate and the second connecting plate are L-shaped plates.

As right the utility model discloses in the improvement of battery module, the mounting with the framework is the integrated into one piece structure.

As to the improvement of the battery module described in the present invention, the length range of the housing is greater than or equal to 600 mm.

The beneficial effects of the utility model reside in that: compared with the prior art, the fixing piece is arranged at the central positions of the two sides of the shell, so that the fixed stress points are added at the middle part of the shell, the influence of stress on the middle part of the battery module in the long-term use process is reduced, the deformation degree is reduced, the connection reliability of the battery module is greatly improved, and the safety performance of the battery pack is improved; in addition, because the mounting is dislocation set on the width direction of casing, consequently, battery module is at the in-process of assembly, and adjacent mounting can overlap, has reduced the occupation to the width space, has improved the utilization ratio in space.

The utility model also provides a battery package, including two at least battery modules, battery module be in above-mentioned arbitrary one section battery module. Through inciting somebody to action the utility model discloses an use the battery module in the battery package, improved the security performance of battery module effectively, simultaneously, also saved the space, improved the energy density of battery package.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided to explain the invention and not to constitute an undue limitation on the invention. In the drawings:

fig. 1 is one of the schematic structural diagrams of the present invention;

fig. 2 is a second schematic structural diagram of the present invention;

FIG. 3 is an exploded view of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is an enlarged view at B in FIG. 3;

fig. 6 is a schematic structural view of a preferred embodiment of the fixing member of the present invention;

fig. 7 is an assembly view of the present invention;

wherein, 0-battery module; 1-a shell; 2-cell monomer; 3-a fixing piece; 4-a scaffold; 11-a frame body; 12-an end plate; 31-connecting vias; 111-a first connection plate; 112-a second connecting plate; 121-mounting holes.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.

Referring to fig. 1 to 5, the battery module shown in this embodiment includes a housing 1 and a plurality of battery cell units 2 accommodated in the housing 1, wherein fixing members 3 are disposed at the center positions of two sides of the housing 1, and the fixing members 3 are disposed in a staggered manner in the width direction W of the housing 1.

In the embodiment, mainly for the battery module with the length range of the shell 1 being more than or equal to 600mm, the fixing piece 3 is arranged at the central positions of the two sides of the shell 1, so that the fixed installation stress points are added at the middle part of the shell 1, the deformation degree of the middle part of the shell 1 is reduced, the connection reliability of the battery module is greatly improved, and the safety performance of the battery pack is improved; in addition, because the fixing pieces 3 are arranged in a staggered manner, when the battery module is assembled, the adjacent fixing pieces 3 can be overlapped in the width W direction, so that the occupied space is reduced, and the utilization rate of the space is improved.

It should be noted that the center positions of both sides of the casing 1 in the present embodiment are not the center of the casing 1, and may be in the vicinity of the center of the casing 1 which is far from both ends of the casing 1 in the longitudinal direction L of the casing 1, and of course, the center of the casing 1 is also within the scope of the present invention.

The fixing member 3 is provided with a coupling through-hole 31, and the coupling through-hole 31 is used for coupling a fastening member, for example: bolts, screws, rivets and the like pass through the connecting through holes 31 and are fixedly connected with structural members in the battery pack, so that the locking of the middle position of the battery module is realized, and the deformation phenomenon of the battery module is effectively prevented. It can be understood that the diameter of the connecting through hole 31 is larger than that of the screw-in end of the fastener to ensure that the screw-in end of the fastener can pass through the connecting through hole 31 to realize locking, and in addition, the diameter of the connecting through hole 31 is smaller than that of the head of the fastener to limit the fastener.

Fixing member 3 can set up to arbitrary shape, both can be regular symmetry shape, for example arc, regular triangle, rectangle, isosceles trapezoid etc. also can be anomalous shape, but under general condition, fixing member 3 prefers arc, rectangle, isosceles trapezoid for fixing member 3 can hold connect the through-hole 31 more fully on width direction W, has reduced the space that fixing member 3 took on width direction W, has further improved the space utilization of battery package.

Referring to fig. 6, as a more preferable solution of this embodiment, in the width direction W, the fixing members 3 on two sides of the housing 1 are disposed at positions corresponding to or abutting against each other, that is, when two battery modules are assembled together, two adjacent fixing members 3 can abut against or engage with each other, so that mutual spacing between two adjacent battery modules is achieved, the resistance of the battery modules in the length direction L is greatly enhanced, the deformation of the middle of the battery modules is reduced, and the reliability of the battery modules is improved.

The housing 1 includes a frame 11 with openings at two ends and end plates 12 fixed at two ends of the frame 11, wherein, in the embodiment, the frame 11 and the fixing member 3 can adopt an integrally formed structure, which greatly enhances the connection strength between the fixing member 3 and the frame 11.

The end plates 12 at the two ends are provided with mounting holes 121, and the mounting holes 121 can be used for fixedly connecting the battery module with structural members in the battery pack, so that the two ends of the battery module are fixed. In addition, the upper surface and the lower surface of the end plate 12 are respectively arranged on the same horizontal plane with the upper surface and the lower surface of the fixing piece 3, so that the length of the used fastening piece is ensured to be the same specification, the assembly difficulty is reduced, and the applicability of the fastening piece is improved.

More specifically, the frame 11 includes a first connecting plate 111 and a second connecting plate 112, and the first connecting plate 111 and the second connecting plate 112 are both L-shaped plates and can surround to form the frame 11. In this embodiment, the connection mode between the first connection plate 111 and the second connection plate 112 may be welding or bonding, and during assembly, a plurality of cell monomers 2 may be placed in the first connection plate 111 or the second connection plate 112 of the L-shaped structure, and then the second connection plate 112 or the first connection plate 111 is fastened, so that the cell monomers 2 are wrapped in the frame 11 formed, and finally the first connection plate 111 and the second connection plate 112 are cut, welded or bonded into a whole. For the convenience of assembly, the end plate 12 may be connected to the frame 11 by welding or bonding, similar to the connection of the first connection plate 111 and the second connection plate 112.

The battery module shown in the embodiment further comprises a support 4, the support 4 is attached to the shell 1, and two ends of the support 4 are respectively locked with the fixing parts 3 on two sides, so that downward pressing force can be applied to the battery module, and the firmness of the battery module is further improved.

Referring to fig. 7, the utility model also provides a battery pack, including at least two battery module 0, battery module 0 does the utility model provides a battery module. Through inciting somebody to action the utility model discloses an use the battery module in the battery package, improved the security performance of battery module effectively, simultaneously, also saved the space, improved the energy density of battery package.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed above, or as otherwise known in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a battery module, includes casing (1) and holds in a plurality of electricity core monomer (2) of casing (1), its characterized in that: the central point of casing (1) both sides puts and is provided with mounting (3), mounting (3) are in for dislocation set in the width direction (W) of casing (1).

2. The battery module according to claim 1, wherein: the fixing piece (3) is provided with a connecting through hole (31), and the connecting through hole (31) is used for connecting a fastening piece.

3. The battery module according to claim 1, wherein: the fixing piece (3) is in any one of a rectangular structure, a triangular structure, a trapezoidal structure and an arc-shaped structure.

4. The battery module according to claim 1, wherein: still include support (4), support (4) laminating set up in casing (1), the both ends of support (4) respectively with casing (1) both sides mounting (3) locking.

5. The battery module according to claim 1, wherein: casing (1) include both ends open-ended framework (11) and be fixed in end plate (12) at framework (11) both ends, be provided with mounting hole (121) on end plate (12), framework (11) include first connecting plate (111) and second connecting plate (112), first connecting plate (111) with second connecting plate (112) surround and form framework (11).

6. The battery module according to claim 5, wherein: the upper surface and the lower surface of the fixing piece (3) are respectively arranged on the same horizontal plane with the upper surface and the lower surface of the end plate (12).

7. The battery module according to claim 5, wherein: the first connecting plate (111) and the second connecting plate (112) are both L-shaped plates.

8. The battery module according to claim 5, wherein: the fixing piece (3) and the frame body (11) are of an integrally formed structure.

9. The battery module according to claim 1, wherein: the length range of the shell (1) is more than or equal to 600 mm.

10. A battery pack, comprising: the battery pack (0) comprises at least two battery modules (0), wherein the battery modules (0) are as defined in any one of claims 1 to 9.