CN220753656U

CN220753656U - Battery module and battery pack thereof

Info

Publication number: CN220753656U
Application number: CN202322270845.XU
Authority: CN
Inventors: 彭翔; 庄文举
Original assignee: Xinwangda Power Technology Co ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2023-08-23
Filing date: 2023-08-23
Publication date: 2024-04-09
Anticipated expiration: 2033-08-23

Abstract

The utility model relates to the technical field of batteries and discloses a battery module and a battery pack, wherein the battery module comprises a battery core assembly, the battery core assembly comprises a plurality of arranged battery core monomers, and a gap is formed between at least part of adjacent battery core monomers; the side plate assembly comprises side plates and air plate assemblies, the side plates are arranged on two sides of the cell assembly, the air plate assemblies are integrally formed on one side of the side plates facing the cell assembly, and at least part of the air plate assemblies are positioned in the gaps; the air plate assembly is internally provided with a channel communicated with the gap, the side plate is also provided with a vent communicated with the channel, and the vent, the channel and the gap are communicated to form a cooling channel. This application separates electric core monomer through the curb plate subassembly and forms cooling channel, need not to additionally set up the wind channel support, has reduced manufacturing cost, has improved space utilization to spacing electric core monomer through the curb plate subassembly, improve battery module's stability.

Description

Battery module and battery pack thereof

Technical Field

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

Background

In order to ensure the stable operation of the battery module, the battery module needs to be cooled, and the operation stability, the endurance and the service life of the battery module are directly affected by the heat dissipation performance of the battery module. The existing cooling modes comprise air cooling, liquid cooling and direct cooling, wherein the air cooling is common, and the air cooling mode mainly carries out heat exchange cooling by cold air flowing through the surface of the battery.

But in the existing battery module, a bracket is generally arranged between adjacent battery cells, an air cooling channel is formed by the bracket, and independent parts increase the quantity and cost of materials and reduce the space utilization rate.

Disclosure of Invention

The purpose of the utility model is that: provided are a battery module and a battery pack with simple structures.

In order to achieve the above object, the present utility model provides a battery module comprising

The battery module is provided with a first direction and a second direction which are intersected, the battery module comprises a plurality of battery cell units arranged along the first direction, and gaps are formed between at least part of adjacent battery cell units;

the side plate assembly comprises side plates and air plate assemblies, the side plates are arranged on two sides of the battery cell assembly along the second direction, the air plate assemblies are integrally formed on one side of the side plates, which faces the battery cell assembly, and at least part of the air plate assemblies are positioned in the gaps; the air plate assembly is internally provided with a channel communicated with the gap, the side plate is also provided with a vent communicated with the channel, and the vent, the channel and the gap are communicated to form a cooling channel.

Optionally, the air plate assembly includes a plate body at least enclosing two sides of the vent along the first direction, the plate body encloses the channel, and one end of the plate body, which is away from the side plate, is located in the gap.

Optionally, the end face of the side plate facing the battery cell assembly is provided with a plurality of first glue grooves which are distributed at intervals along the first direction, each first glue groove is at least corresponding to one battery cell monomer, and the battery cell monomers are adhered in the first glue grooves.

Optionally, the side plate assembly further includes an end plate, the end plate is located at two opposite sides of the electric core assembly along the first direction and is connected to the side plate, a first glue groove is formed between two adjacent air plate assemblies and/or between the air plate assemblies and the end plate in a surrounding mode, and each electric core monomer is correspondingly adhered to each first glue groove.

Optionally, the battery module further has a third direction intersecting with both the first direction and the second direction, and the third direction is a height direction of the battery cell unit;

the battery module is characterized by further comprising an upper cover connected to the side plate, the upper cover is arranged on one side of the battery cell assembly along a third direction, a third glue groove is formed in the upper cover and/or the side plate, the third glue groove is formed in the joint of the upper cover and the side plate, an adhesive is arranged in the third glue groove, and the side plate and the upper cover are connected through the adhesive in the third glue groove in an adhesive bonding mode.

Optionally, the battery module still including connect in the bottom plate of curb plate, the bottom plate is located the electricity core subassembly deviates from one side of upper cover, the bottom plate and/or the curb plate is equipped with the second and glues the groove, the second glues the groove and is located the bottom plate with the junction of curb plate, be equipped with the adhesive in the second glues the inslot, the curb plate with the bottom plate passes through the adhesive bonding in the second glues the inslot links to each other.

Optionally, a plurality of limiting grooves arranged along the first direction are formed in one end, facing the battery cell assembly, of the bottom plate and/or the upper cover, and each limiting groove is at least arranged corresponding to one battery cell unit.

Optionally, the end plate and the side plate are integrally formed.

Optionally, the upper cover, the end plate and the bottom plate are respectively provided with a connecting hole, and the battery module further comprises a fixing piece, wherein the fixing piece is inserted into the connecting holes of the upper cover, the end plate and the bottom plate, so that the upper cover, the end plate and the bottom plate are fixed.

The utility model also provides a battery pack, which comprises a shell, wherein a containing cavity is formed in the shell, and at least one battery module of any one of the above embodiments is arranged in the containing cavity.

Compared with the prior art, the beneficial effects of the method are as follows: according to the air plate assembly, the air plate assembly 22 is integrated on the side plate 21, an air duct support is not required to be additionally arranged, the installation steps are reduced, the production cost is reduced, the weight of the battery module is reduced, and meanwhile, the space utilization rate is improved. And this application stretches into in the clearance between the electric core monomer 41 through air plate assembly 22 to carry out spacing fixed to electric core monomer 41, guaranteed the unobstructed of cooling channel 42, and can ensure battery module's stability.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

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

fig. 2 is a schematic structural view of an upper cover (viewed from an obliquely upper side) according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a top cover (viewed from obliquely below) according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a side plate assembly according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a side plate assembly according to a second embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of a base plate according to an embodiment of the present utility model;

fig. 7 is a schematic view of the overall structure of a battery module (with an upper cover removed) according to an embodiment of the present utility model;

fig. 8 is a top view of fig. 7.

In the figure:

1. an upper cover; 13. a second connection hole; 14. a post hole;

2. a side panel assembly; 21. a side plate; 211. a vent; 212. a first glue groove; 213. a third glue groove;

22. an air plate assembly; 221. a plate body; 222. a channel; 23. an end plate; 231. a first connection hole;

3. a bottom plate; 31. a second glue groove; 33. a limit groove; 34. a third connection hole;

4. a cell assembly; 41. a cell unit; 42. and a cooling channel.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

As shown in fig. 1 to 8, a battery module according to a preferred embodiment of the present utility model includes a battery cell assembly 4 and a side plate assembly 2, wherein the battery module has a first direction, a second direction and a third direction intersecting each other, the first direction is a length direction of the battery module, the second direction is a width direction of the battery module, and the third direction is a height direction of the battery module; preferably, the first direction, the second direction and the third direction are disposed perpendicular to each other. The battery cell assembly 4 comprises a plurality of battery cell units 41 arranged along the first direction, the battery cell units 41 are arranged in a square shape, the end faces of the square battery cell units 41 needing ventilation and cooling are arranged in a pair of opposite directions, and preferably, the battery cell units 41 are arranged in parallel. At least part of the adjacent two battery cells 41 are provided with gaps, in particular, a gap for cooling gas to pass through is reserved between part of the battery cells 41 needing cooling, or any two adjacent battery cells 41 are provided with gaps.

The side plate assembly 2 includes a side plate 21 and a wind plate assembly 22, the side plate 21 has at least two pieces and is respectively arranged at two sides of the cell assembly 4 along the second direction, the wind plate assembly 22 is integrally formed at one side of the side plate 21 facing the cell assembly 4, the wind plate assembly 22 extends towards the cell assembly 4 along the second direction, and at least part of the wind plate assembly 22 is located in the gap, it is understood that the wind plate assembly 22 can completely enter the gap or can enter the gap near a part of the cell assembly 4, and the limitation is not specifically limited herein; the air plate assembly 22 is internally provided with a channel 222 extending along the second direction, the channel 222 penetrates through the air plate assembly 22 and is communicated with the gap, the end face, facing away from the air plate assembly 22, of the side plate 21 along the second direction is provided with a vent 211, the vent 211 is communicated with the channel 222, the vent 211, the channel 222 and the gap are communicated to form a cooling channel 42, and the cooling channel 42 is ventilated by natural wind, a fan or a refrigerating unit and other devices to realize cooling of the battery cell 41.

According to the air plate assembly, the air plate assembly 22 is integrated on the side plate 21, an air duct support is not required to be additionally arranged, the installation steps are reduced, the production cost is reduced, the weight of the battery module is reduced, and meanwhile, the space utilization rate is improved. And this application stretches into in the clearance between the electric core monomer 41 through air plate assembly 22 to carry out spacing fixed to electric core monomer 41, guaranteed the unobstructed of cooling channel 42, and can ensure battery module's stability.

In some embodiments of the present utility model, the air foil assembly 22 includes plate bodies 221 that are at least surrounded on two opposite sides of the air vent 211 in the first direction, it is understood that the plate bodies 221 may be separate plate bodies 221, the plate bodies 221 may be surrounded to form channels 222, or may be annular plate bodies 221 that extend along the periphery of the air vent 211, and the channels 222 are formed inside the annular plate bodies 221; one end of the plate body 221, which is away from the side plate 21, is located in the gap, so that the channel 222 is communicated with the gap between the two single batteries, two ends of the channel 222 defined by the plate body 221 are respectively communicated with the ventilation opening 211 and the gap, and a cooling channel 42 is formed, so that refrigerating gas or air can smoothly enter the gap to cool the battery cell 41.

In some embodiments of the present utility model, a plurality of first adhesive grooves 212 are disposed on an end surface of the side plate 21 facing the battery cell assembly 4, the first adhesive grooves 212 are distributed at intervals along the first direction and extend along the third direction, and each first adhesive groove 212 is disposed corresponding to at least one battery cell 41. It can be understood that in the present embodiment, one first glue groove 212 may be disposed corresponding to one cell 41, or one first glue groove 212 may be disposed corresponding to a plurality of cell 41, and the first glue groove 212 has an adhesive therein to bond the cell 41 in the first glue groove 212. The electric core monomers 41 are fixed on the side plates 21 through the adhesive in the first adhesive groove 212, so that the electric core monomers 41 are fixed more firmly, the cooling channels 42 between the electric core monomers 41 are also fixed more firmly, and the cooling effect of the electric core monomers 41 is ensured.

In some embodiments of the present utility model, the side plate assembly 2 further includes end plates 23, the end plates 23 are located at two opposite sides of the cell assembly 4 along the first direction and are connected to the side plates 21, first glue grooves 212 are formed between two adjacent air plate assemblies 22 and/or between the air plate assemblies 22 and the end plates 23 in a surrounding manner, and each cell unit 41 is correspondingly adhered in each first glue groove 212. Specifically, in the present embodiment, the first glue groove 212 is defined by the air plate assemblies 22, the number of the air plate assemblies 22 is plural, the air plate assemblies 22 are arranged at intervals along the first direction, each air plate assembly 22 is arranged corresponding to each gap, two adjacent air plate assemblies 22 are defined to form the first glue groove 212, and two electric core monomers 41 located at two ends of the electric core assembly 4 along the first direction are respectively defined to form the first glue groove 212 with the end plates 23, and the positions and the sizes of the first glue groove 212 are defined by the outer side walls of the air plate assemblies 22 without additional processing of glue guiding grooves. Each cell unit 41 is correspondingly adhered in each first adhesive groove 212, so that the fixing of the cell units 41 is more firm, and the cooling channels 42 between the cell units 41 are also more firm.

In some embodiments of the present utility model, the battery module further includes a cover 1 connected to the side plate 21, the cover 1 being disposed at one side of the battery cell assembly 4 in the third direction, the cover 1 defining the cooling channel 42 at one side of the battery cell assembly 4 in the third direction, preventing the cooling gas or air from escaping the cooling channel 42 from the third direction. The third glue groove is formed at the connection position of the upper cover 1 and the side plate 21, it can be understood that the third glue groove can be formed on the end surface of the upper cover 1 facing the side plate 21, or can be formed on the end surface of the side plate 21 facing the upper cover 1, or the upper cover 1 and the side plate 21 are both provided with the second glue groove 31, so long as the effect of bonding the upper cover 1 and the side plate 21 can be achieved; the upper cover 1 is used for sealing the battery cell assembly 4 in the third direction of the battery cell assembly 4, an adhesive is arranged in the third adhesive groove, the side plate 21 and the upper cover 1 are connected through the adhesive in the third adhesive groove, and the upper cover 1 and the side plate 21 are firmly fixed, are not easy to fall off and are well sealed through the adhesive.

Further, the upper cover 1 is further provided with a pole hole 14, and the pole hole 14 is arranged corresponding to a pole of the battery cell unit 41, so that the unit battery cell can flow to the outside through the pole hole 14.

In some embodiments of the present utility model, the battery module further includes a bottom plate 3 connected to the side plate 21, the bottom plate 3 is disposed on a side of the battery cell assembly 4 facing away from the upper cover 1, the bottom plate 3 is used for defining the cooling channel 42 on a side facing away from the upper cover 1 in a third direction, so as to prevent cooling gas or air from escaping from the cooling channel 42 from the other side of the battery cell assembly 4, and the upper cover 1, the bottom plate 3, the side plate 21 and the battery cell 41 define the cooling channel 42 in multiple directions, so that the cooling gas or air always passes through the cooling channel 42 to cool the battery cell 41. The bottom plate 3 and/or the side plate 21 are/is provided with a second glue groove 31, and the second glue groove 31 is located at the joint of the bottom plate 3 and the side plate 21, it is understood that the second glue groove 31 may be disposed on the end surface of the bottom plate 3 facing the side plate 21, or may be disposed on the end surface of the side plate 21 facing the bottom plate 3, or the bottom plate 3 and the side plate 21 are provided with the second glue groove 31, so long as the effect of bonding the bottom plate 3 and the side plate 21 can be achieved. The second glue groove 31 is internally provided with an adhesive, and the side plate 21 and the bottom plate 3 are bonded and connected through the adhesive in the second glue groove 31.

In some embodiments of the present utility model, the end of the bottom plate 3 and/or the upper cover 1 facing the cell assembly 4 is provided with a plurality of limiting grooves 33 arranged along the first direction, it is understood that the limiting grooves 33 may be separately provided on the bottom plate 3 or the upper cover 1, or may be provided at both the bottom plate 3 and the upper cover 1. Each of the limiting grooves 33 is at least corresponding to one of the battery cell units 41, that is, one of the limiting grooves 33 can accommodate one battery cell unit 41, and also can accommodate a plurality of battery cell units 41. Further, the plurality of limiting grooves 33 are arranged along the first direction to adapt to the arrangement of the electrical core assembly 4, so as to improve the space utilization.

In some embodiments of the utility model, the end plate 23 is integrally formed with the side plate 21. In this embodiment, the end plate 23 and the side plate 21 are all plastic parts, and are integrally formed by injection molding, so that welding cost is saved, structural strength is improved, and meanwhile, the step of installing the end plate 23 is saved.

In some embodiments of the present utility model, the upper cover 1, the end plate 23 and the bottom plate 3 are respectively provided with a connecting hole, and the battery module further includes a fixing member inserted into the connecting holes of the upper cover 1, the end plate 23 and the bottom plate 3 to fix the upper cover 1, the end plate 23 and the bottom plate 3. Specifically, the end plate 23 has two end faces respectively facing the upper cover 1 and the bottom plate 3 along the third direction, and the two end faces are provided with first connecting holes 231, or the first connecting holes 231 penetrate through the two end faces of the end plate 23 along the third direction, the upper cover 1 is provided with second connecting holes 13, the bottom plate 3 is provided with third connecting holes 34, and the first connecting holes 231, the second connecting holes 13 and the third connecting holes 34 are all relatively arranged, and further, the apertures of the first connecting holes 231, the second connecting holes 13 and the third connecting holes 34 are the same and the number of the apertures is the same. The outer diameter of the fixing member matches the apertures of the first, second and third connection holes 231, 13 and 34, and the fixing member may be a bolt, a stud, or the like. The fixing piece is arranged to firmly fix the bottom plate 3, the upper cover 1 and the side plate assembly 2, so that the overall strength of the battery module is improved, and the assembly process is simple and the cost is low.

In summary, the embodiment of the utility model provides a battery module and a battery pack thereof, wherein a cooling channel 42 is formed by separating a battery cell 41 through a side plate assembly 2, an air duct bracket is not required to be additionally arranged, the production cost is reduced, and the space utilization rate is improved. And through the spacing electric core monomer 41 of air plate assembly 22 integrated on curb plate 21 to through bonding fixed electric core monomer 41 and upper cover 1 and bottom plate 3, improve the holistic structural strength of battery module, reduced welding process, the assembly is simple.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims

1. A battery module, comprising:

the battery module is provided with a first direction and a second direction which are intersected, the battery module (4) comprises a plurality of battery cells (41) arranged along the first direction, and a gap is formed between at least part of adjacent battery cells (41);

the side plate assembly (2), the side plate assembly (2) comprises a side plate (21) and a wind plate assembly (22), the side plate (21) is arranged on two sides of the battery cell assembly (4) along the second direction, the wind plate assembly (22) is integrally formed on one side of the side plate (21) facing the battery cell assembly (4), and at least part of the wind plate assembly (22) is positioned in the gap; the air plate assembly (22) is internally provided with a channel (222) communicated with the gap, the side plate (21) is also provided with a vent (211) communicated with the channel (222), and the vent (211), the channel (222) and the gap are communicated to form a cooling channel (42).

2. The battery module according to claim 1, wherein the air plate assembly (22) includes plate bodies (221) that are provided around at least both sides of the vent (211) opposite in the first direction, the plate bodies (221) are provided around to form the channel (222), and one ends of the plate bodies (221) that face away from the side plates (21) are located in the gap.

3. The battery module according to claim 1, wherein a plurality of first glue grooves (212) which are distributed at intervals along the first direction are formed in an end face of the side plate (21) facing the battery cell assembly (4), each first glue groove (212) is at least corresponding to one battery cell unit (41), and the battery cell units (41) are adhered in the first glue grooves (212).

4. The battery module according to claim 1, wherein the side plate assembly (2) further comprises end plates (23), the end plates (23) are located at two opposite sides of the cell assembly (4) along the first direction and are connected to the side plates (21), a first glue groove (212) is formed between two adjacent air plate assemblies (22) and/or between the air plate assemblies (22) and the end plates (23) in a surrounding mode, and each cell unit (41) is correspondingly adhered in each first glue groove (212).

5. The battery module according to claim 4, further having a third direction intersecting both the first direction and the second direction, the third direction being a height direction of the battery cell (41);

the battery module is further characterized by comprising an upper cover (1) connected to the side plate (21), wherein the upper cover (1) is arranged on one side of the battery cell assembly (4) along a third direction, the upper cover (1) and/or the side plate (21) is/are provided with a third glue groove (213), the third glue groove (213) is located at the joint of the upper cover (1) and the side plate (21), an adhesive is arranged in the third glue groove (213), and the side plate (21) and the upper cover (1) are connected through the adhesive in the third glue groove (213) in an adhesive bonding mode.

6. The battery module according to claim 5, further comprising a bottom plate (3) connected to the side plate (21), wherein the bottom plate (3) is arranged on one side of the cell assembly (4) away from the upper cover (1), the bottom plate (3) and/or the side plate (21) is provided with a second glue groove (31), the second glue groove (31) is positioned at the joint of the bottom plate (3) and the side plate (21), an adhesive is arranged in the second glue groove (31), and the side plate (21) and the bottom plate (3) are connected through the adhesive in the second glue groove (31).

7. The battery module according to claim 6, wherein a plurality of limiting grooves (33) arranged along the first direction are formed in one end of the bottom plate (3) and/or the upper cover (1) facing the battery cell assembly (4), and each limiting groove (33) is at least corresponding to one battery cell (41).

8. The battery module according to claim 6, wherein the end plate (23) is integrally formed with the side plate (21).

9. The battery module according to claim 8, wherein the upper cover (1), the end plate (23) and the bottom plate (3) are respectively provided with a connecting hole, and the battery module further comprises a fixing member inserted into the connecting holes of the upper cover (1), the end plate (23) and the bottom plate (3) to fix the upper cover (1), the end plate (23) and the bottom plate (3).

10. A battery pack comprising a housing having a receiving chamber formed therein, wherein at least one battery module according to any one of claims 1 to 9 is disposed in the receiving chamber.