CN220604888U - Battery module shell and battery module - Google Patents

Abstract

The utility model discloses a battery module housing and a battery module. The battery module case includes: the battery cell comprises a bottom plate, end plates and insulating partition plates, wherein the end plates are respectively connected to the opposite sides of the bottom plate, the insulating partition plates are integrally formed on the bottom plate, the insulating partition plates are located between the two end plates to form at least two mounting cavities, the mounting cavities are used for accommodating battery cells, first radiating holes are formed in the insulating partition plates and used for communicating the two adjacent mounting cavities. So, reduced spare part and production frock's quantity and kind, simplified the equipment process, reduced manufacturing cost, the factor that influences battery module's product quality is reduced to manage and control more easily and promote battery module's product quality, first louvre is seted up in insulating division board, is favorable to the heat dissipation of electric core, also is favorable to guaranteeing whole production efficiency, more importantly, two adjacent installation chambeies are through first louvre intercommunication, are favorable to improving the temperature uniformity of each electric core.

Description

Battery module shell and battery module

Technical Field

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

Background

The current battery module generally includes end plate and the electric core group that is formed by a plurality of electric core stacks, and the end plate sets up in the both ends of electric core group respectively, and wherein, the assembled mode of battery module is usually: structural adhesive and insulating sheet sticking are arranged between the battery cells, structural adhesive and insulating sheet sticking are arranged between the battery cells and the end plates, then the end plates and the stacked battery cell groups are bound together through steel belts, and the following defects exist in the assembly mode of the battery module:

1. the binding and fixing effects are influenced by the thickness of the insulating sheets, the thickness of the electric core, the thickness of the end plates, the size of the steel belt and other factors, and the total thickness of the insulating sheets, the electric cores and the two end plates after being stacked together relates to a size chain, so that the tolerance zone is difficult to control and the product quality of the battery module is difficult to ensure;

2. the work of beating the structural adhesive and then pasting the insulating sheet needs more manpower, and in order to sleeve the steel belt on the stacked cell groups, a special clamp is needed to squeeze the cell groups, and then the steel belt is sleeved, so that the production cost is high, and the assembly is complex;

3. the heat dissipation of electric core is not good, and the uneven and too high problem of temperature appears in each electric core easily.

Disclosure of Invention

In order to overcome at least one of the defects described in the prior art, the utility model provides a battery module housing and a battery module, which aim to ensure and improve the product quality of the battery module, simplify the assembly process to reduce the production cost, and improve the heat dissipation of a battery cell.

The utility model adopts the technical proposal for solving the problems that:

a battery module housing, the battery module housing comprising: the battery pack comprises a bottom plate, end plates and insulating spacing plates, wherein the end plates are respectively connected to the opposite sides of the bottom plate, the insulating spacing plates are integrally formed on the bottom plate, the insulating spacing plates are located between the two end plates to form at least two mounting cavities, the mounting cavities are used for accommodating battery cells, first radiating holes are formed in the insulating spacing plates, and the first radiating holes are used for communicating two adjacent mounting cavities.

According to some embodiments of the utility model, the insulating spacer has an open area of 10% -15%.

According to some embodiments of the utility model, at least one of the end plates is integrally formed with the base plate.

According to some embodiments of the utility model, the battery module case further comprises a side plate connected between the two end plates, the bottom plate, the end plates and the side plate enclose a case body, and the bottom plate, the end plates and the side plate are in an integrally formed structure.

According to some embodiments of the utility model, the side plate is provided with a second heat dissipation hole, and the second heat dissipation hole is communicated with the mounting cavity.

According to some embodiments of the utility model, the second heat dissipating holes are S-shaped holes.

According to some embodiments of the utility model, the second heat dissipation holes are provided in plurality, and the second heat dissipation holes are arranged in plurality to form a grid structure.

According to some embodiments of the utility model, the end plate is provided with a third heat dissipation hole, the third heat dissipation hole is communicated with the mounting cavity, and/or the bottom plate is provided with a fourth heat dissipation hole, and the fourth heat dissipation hole is communicated with the mounting cavity.

According to some embodiments of the utility model, the battery module case further includes a limit bar, the limit bar is connected between the two end plates, and the limit bar is used for propping against the outer side surface of the battery cell.

In addition, the utility model also provides a battery module, which comprises the battery module shell and at least two electric cores, wherein the at least two electric cores are arranged in the at least two mounting cavities in a one-to-one correspondence manner, each electric core forms an electric core group, and the end plate is abutted with the end part of the electric core group.

In summary, the battery module housing and the battery module provided by the utility model have at least the following technical effects:

1) The bottom plate and the insulating spacer plate are integrally formed, the insulating spacer plate divides the inner space of the battery module shell 100 into at least two mounting cavities for accommodating the battery cells, the number and the variety of parts and production tools are reduced, the assembly process is simplified, and the production cost is reduced;

2) The structure glue and the insulating sheet can be prevented from being arranged between the two battery cores, and the structure glue and the insulating sheet can be prevented from being arranged between the battery cores and the end plate, so that factors affecting the product quality of the battery module are reduced, and the product quality of the battery module is easier to control and improve;

3) The first radiating holes are formed in the insulating partition plate, so that the heat dissipation of the battery cells is facilitated, the overall production efficiency is guaranteed and improved, and the material cost is reduced;

4) The two adjacent installation cavities are communicated through the first radiating holes, so that the temperature consistency of each battery cell is guaranteed and improved.

Drawings

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

fig. 2 is a schematic top view of a battery module housing according to an embodiment of the present utility model;

fig. 3 is a schematic side view of a battery module case according to an embodiment of the present utility model.

Wherein the reference numerals have the following meanings:

1000-battery module, 100-battery module shell, 11-bottom plate, 12-end plate, 13-side plate, 14-insulating partition plate, 15-first heat dissipation hole, 16-second heat dissipation hole, 17-third heat dissipation hole, 18-fourth heat dissipation hole, 19-limit bar, 20-screw, 21-cell, 22-busbar, 23-module data acquisition line.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The utility model is described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 to 3, the utility model discloses a battery module housing 100 and a battery module 1000, wherein the battery module 1000 comprises the battery module housing 100 and a plurality of battery cells 21.

As shown in fig. 1 and 2, further, in this embodiment, the battery module housing 100 includes a bottom plate 11, end plates 12 and insulating spacer plates 14, the opposite sides of the bottom plate 11 are respectively connected with the end plates 12, the insulating spacer plates 14 are integrally formed on the bottom plate 11, the insulating spacer plates 14 are located between the two end plates 12 to form a plurality of mounting cavities for the electric cores 21, specifically, the electric cores 21 are disposed in the plurality of mounting cavities in a one-to-one correspondence manner, each electric core 21 forms an electric core group, the end plates 12 are abutted against the end portions of the electric core group to inhibit expansion force generated when the electric core group works, and the insulating spacer plates 14 are provided with first heat dissipation holes 15, and the first heat dissipation holes 15 are used for communicating the adjacent two mounting cavities.

Thus, by adopting the above scheme, the bottom plate 11 and the insulating spacer plate 14 are integrally formed, the insulating spacer plate 14 divides the inner space of the battery module housing 100 into a plurality of mounting cavities for accommodating the battery cells 21, on one hand, the overall structural strength is improved, structural glue and insulating sheet sticking between the two battery cells 21 can be avoided, structural glue and insulating sheet sticking between the battery cells 21 and the end plate 12 can be avoided, and a steel belt and a clamp for extruding a battery cell group are not required, so that the number and variety of parts and production tools are reduced, the assembly procedure is simplified, the production cost is reduced, and importantly, the factors influencing the product quality of the battery module 1000 are reduced, thereby the product quality of the battery module 1000 is easier to manage and control; on the other hand, the first heat dissipation holes 15 are formed in the insulating partition plate 14, so that heat dissipation of the battery cells 21 is facilitated, overall production efficiency is guaranteed and improved, material cost is reduced, and more importantly, two adjacent installation cavities are communicated through the first heat dissipation holes 15, so that temperature consistency of each battery cell 21 is guaranteed and improved.

It can be understood that if the aperture ratio of the insulating spacer plate 14 is too small, there is a problem that heat dissipation is not good, and if the aperture ratio of the insulating spacer plate 14 is too large, structural strength and molding efficiency of the insulating spacer plate 14 are easily affected, specifically, the aperture ratio of the insulating spacer plate 14 refers to a ratio of the total area of the first heat dissipation holes 15 to the area of the insulating spacer plate 14; therefore, in the present embodiment, the opening ratio of the insulating spacer 14 is preferably 10% -15%, so that on the one hand, the heat dissipation efficiency of the first heat dissipation holes 15 to the battery cells 21 can be ensured, and on the other hand, the structural strength and the molding efficiency of the insulating spacer 14 can be kept as low as possible even when the insulating spacer 14 is integrally molded.

As shown in fig. 1 and 3, in particular, in the present embodiment, the battery module case 100 further includes a side plate 13, the side plate 13 is connected between two end plates 12, and the bottom plate 11, the end plates 12 and the side plate 13 are enclosed into a case body, more preferably, in the present embodiment, the bottom plate 11, the end plates 12, the side plate 13 and the insulating spacer 14 are integrally formed, i.e., the battery module case 100 is integrally formed as a whole, to further improve structural strength and reduce the number of parts, simplify assembly processes, improve production efficiency and reduce production costs. More preferably, in the present embodiment, the bottom plate 11, the end plate 12, the side plates 13 and the insulating spacer plates 14 are integrally injection-molded from an insulating material, i.e., the battery module case 100 is integrally injection-molded as a whole, which is easy and convenient to manufacture, and convenient for mass production.

Preferably, in the present embodiment, the second heat dissipation holes 16 are formed in the side plate 13, and the second heat dissipation holes 16 are communicated with the mounting cavity, so that the heat dissipation efficiency of the battery cell 21 can be further improved while the production efficiency and the structural strength of the battery module housing 100 are not affected as much as possible. Preferably, in the present embodiment, the second heat dissipation holes 16 are S-shaped holes, and compared with the conventional heat dissipation hole structures with rectangular shapes, the S-shaped second heat dissipation holes 16 have much smaller weakening of structural strength, so that the S-shaped second heat dissipation holes 16 can play a role in heat dissipation that is not weaker than that of the rectangular heat dissipation hole structures while ensuring structural strength of the side plates 13, and the S-shaped second heat dissipation holes 16 have a certain ornamental value compared with the conventional heat dissipation hole structures, so that a bright spot can be added to the overall structural appearance of the battery module 1000. More preferably, a plurality of second heat dissipation holes 16 are provided, and the plurality of second heat dissipation holes 16 are arranged to form a grid structure, so as to further improve the heat dissipation efficiency of the battery cell 21.

As shown in fig. 1 and 2, in the present embodiment, preferably, the end plate 12 is provided with the third heat dissipation hole 17, the bottom plate 11 is provided with the fourth heat dissipation hole 18, the third heat dissipation hole 17 and the fourth heat dissipation hole 18 are all communicated with the mounting cavity, so that the first heat dissipation hole 15, the second heat dissipation hole 16, the third heat dissipation hole 17 and the fourth heat dissipation hole 18 are all communicated with the mounting cavity, and the first heat dissipation hole 15 can also be communicated with two adjacent mounting cavities, and the first heat dissipation hole 15, the second heat dissipation hole 16, the third heat dissipation hole 17 and the fourth heat dissipation hole 18 together form a good ventilation heat dissipation system, so that reliable support can be provided for efficient cooling of the battery module 1000, and the temperature consistency of each cell 21 of the battery module 1000 can also be ensured and improved.

It will be appreciated that in some other embodiments, fans may be used to deliver cooling air to the first 15, second 16, third 17 and fourth 18 heat sinks to create air-cooled heat sinks, as may be desired.

It should be noted that, in some other embodiments, the end plate 12 and the bottom plate 11 may not be integrally formed, specifically, the end plate 12 and the bottom plate 11 may be fixed by welding or screwing, which is selected according to practical needs.

It should be noted that, in some other embodiments, the side plate 13 and the bottom plate 11 may not be integrally formed, and specifically, the side plate 13 and the bottom plate 11 may be fixed by welding or screwing, which is selected according to practical needs.

As shown in fig. 1, further, in the present embodiment, the battery module housing 100 further includes a limiting bar 19, where the limiting bar 19 is connected between the two end plates 12, specifically, one end of the limiting bar 19 is fixed to one end plate 12 thereof by a screw 20, the other end of the limiting bar 19 is fixed to the other end plate 12 by the screw 20, and the limiting bar 19 is used to abut against an outer side surface of the battery cell 21 to prevent the battery cell 21 from being separated from the mounting cavity. Thus, compared with the conventional box cover type fixing, the fixing of the battery cell 21 by the limit bar 19 has the following advantages: 1. the structure is simple, the cost is low, the size is easy to control, the production is simple and convenient, and the mass production is convenient; 2. each cell 21 can be well fixed, and the product quality of the battery module 1000 is ensured; 3. the limiting strips 19 are strip-shaped, and do not seal the openings formed between the two end plates 12, so that on one hand, the limiting strips can be combined with the first heat dissipation holes 15, the second heat dissipation holes 16, the third heat dissipation holes 17 and the fourth heat dissipation holes 18 to form an excellent ventilation and heat dissipation system, and further reduce the risk of thermal runaway, and on the other hand, the battery module 1000 can be provided with universality, and the battery module housing 100 can be used as a carrier for the low-capacity battery cells 21 and the high-capacity battery cells 21.

More specifically, in the present embodiment, the battery module 1000 is designed and manufactured as follows:

1. determining the size specification of each mounting cavity in the battery module housing 100 according to the type of the battery cell 21 used in the battery module 1000, and opening an injection mold according to the size specification;

2. each of the battery cells 21 is mounted in a designated direction into the mounting cavity of the battery module case 100;

3. the busbar 22 is arranged at the opening between the two end plates 12, the busbar 22 and the battery cells 21 are welded to connect the positive and negative poles of each battery cell 21 in series and parallel, and finally, a module data acquisition line 23 is installed (fixed by gluing or welded) on the busbar 22 to form the complete battery module 1000.

Preferably, in the present embodiment, the battery module case 100 is integrally injection-molded of the POM material, the strength of which is close to that of the steel, and thus reliable use of the battery module 1000 can be effectively ensured. Of course, in some other embodiments, the battery module case 100 may be injection molded, but not limited to, of PBT material or PPS material, as long as the insulation performance requirement and the structural strength requirement of the battery module case 100 are satisfied, which is not limited only herein.

In summary, the battery module housing 100 and the battery module 1000 disclosed in the utility model can at least bring the following beneficial technical effects:

1) The insulating spacer plates 14 are integrally formed on the bottom plate 11, and the insulating spacer plates 14 are positioned between the two end plates 12 to form a plurality of mounting cavities for the battery cells 21, so that the number and types of parts and production tools are reduced, the assembly process is simplified, the production cost is reduced, and the factors affecting the product quality of the battery module 1000 are reduced, thereby being easier to manage and control and improve the product quality of the battery module 1000;

2) The first heat dissipation holes 15 are formed in the insulating partition plate 14, so that heat dissipation of the battery cells 21 is facilitated, overall production efficiency is guaranteed and improved, material cost is reduced, and more importantly, two adjacent installation cavities are communicated through the first heat dissipation holes 15, so that temperature consistency of each battery cell 21 is guaranteed and improved;

3) The heat dissipation efficiency of the first heat dissipation holes 15 to the battery cells 21 can be ensured, and the structural strength and the molding efficiency of the insulating spacer plates 14 can be not reduced as much as possible when the insulating spacer plates 14 are integrally molded;

4) The bottom plate 11, the end plate 12, the side plate 13 and the insulating partition plate 14 are integrally injection molded by insulating materials, so that the production is simple and convenient, and the mass and rapid production is convenient;

5) The stop strip 19, the first heat dissipation hole 15, the second heat dissipation hole 16, the third heat dissipation hole 17 and the fourth heat dissipation hole 18 together constitute an excellent ventilation heat dissipation system to further reduce the risk of thermal runaway.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. Battery module case (100), characterized by comprising: the battery pack comprises a bottom plate (11), end plates (12) and insulating spacing plates (14), wherein one end plate (12) is connected to two opposite sides of the bottom plate (11), the insulating spacing plates (14) are integrally formed on the bottom plate (11), the insulating spacing plates (14) are located between the two end plates (12) to form at least two mounting cavities, the mounting cavities are used for accommodating battery cells (21), first radiating holes (15) are formed in the insulating spacing plates (14), and the first radiating holes (15) are used for communicating two adjacent mounting cavities.

2. The battery module case (100) according to claim 1, wherein the opening ratio of the insulating spacer plates (14) is 10% -15%.

3. The battery module housing (100) according to claim 1, wherein at least one of the end plates (12) is integrally formed with the bottom plate (11).

4. The battery module case (100) according to claim 3, wherein the battery module case (100) further comprises a side plate (13), the side plate (13) is connected between the two end plates (12), the bottom plate (11), the end plates (12) and the side plate (13) enclose a case body, and the bottom plate (11), the end plates (12) and the side plate (13) are integrally formed.

5. The battery module case (100) according to claim 4, wherein the side plate (13) is provided with a second heat radiation hole (16), and the second heat radiation hole (16) communicates with the mounting cavity.

6. The battery module case (100) according to claim 5, wherein the second heat dissipation hole (16) is an S-shaped hole.

7. The battery module case (100) according to claim 6, wherein a plurality of the second heat dissipation holes (16) are provided, and a plurality of the second heat dissipation holes (16) are arranged to constitute a grid structure.

8. The battery module case (100) according to any one of claims 1 to 7, wherein a third heat dissipation hole (17) is formed in the end plate (12), the third heat dissipation hole (17) is in communication with the mounting cavity, and/or a fourth heat dissipation hole (18) is formed in the bottom plate (11), and the fourth heat dissipation hole (18) is in communication with the mounting cavity.

9. The battery module housing (100) according to any one of claims 1 to 7, wherein the battery module housing (100) further comprises a limit bar (19), the limit bar (19) is connected between the two end plates (12), and the limit bar (19) is used for abutting against an outer side surface of the battery cell (21).

10. Battery module (1000), characterized by comprising a battery module housing (100) according to any one of claims 1-9, and further comprising at least two electric cells (21), wherein at least two electric cells (21) are arranged in at least two mounting cavities in a one-to-one correspondence, each electric cell (21) forms an electric cell group, and an end plate (12) is abutted against an end of the electric cell group.