CN209374538U - Battery module housings, battery modules, battery packs, and automobiles - Google Patents

Abstract

The utility model relates to technical field of new energy, a kind of battery modules shell, battery modules, battery pack and automobile are provided.The battery modules shell includes the first fin (10), the second fin (20) and two side plates (30) being oppositely arranged, first fin (10) and second fin (20) are separately positioned on the different side plates (30) and extend along the length direction of the side plate (30), it is provided with corresponding through-hole on first fin (10) and second fin (20), first fin (10) and second fin (20) are parallel to each other and be staggered in the width direction of two side plates (30).Battery modules shell provided by the present application improves battery pack and battery modules resist the ability for squeezing and colliding, and makes the arrangement between battery modules more compact, has saved the inner space of battery pack.

Description

Battery module housings, battery modules, battery packs, and automobiles

technical field

The utility model relates to the technical field of new energy vehicles, in particular to a battery module housing, a battery module, a battery pack and an automobile.

Background technique

New energy vehicles, especially electric vehicles, are the development direction of future vehicles. The power battery pack is an important part of the electric vehicle, and the module is the core component of the power battery pack. The collision safety of battery modules has always been one of the important concerns of new energy vehicles. The existing battery pack protection structure will cause a large deformation of the battery pack when an abnormal accident occurs in the vehicle, resulting in a fire that threatens the safety of the members. In addition, the side-fixed module developed based on the whole package will form a gap between the end plate and the side plate due to the existence of assembly tolerances, resulting in the laser welding of the end and side plates. to the internal cells of the battery module, which may cause the failure of the cell insulation film.

Therefore, it is necessary to improve the current battery modules to overcome these problems or at least reduce the probability of these problems.

Utility model content

In view of this, the present invention aims to provide a battery module casing to improve the ability of the battery module to resist extrusion and collision.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

A battery module case, the battery module case includes a first rib, a second rib and two opposite side plates, the first rib and the second rib are respectively arranged on On the different side plates and extending along the length direction of the side plates, corresponding through holes are provided on the first and second ridges, and the first and second ridges are provided with corresponding through holes. The ridges are parallel to each other and staggered in the width direction of the two side plates.

Further, the first protruding edge and the second protruding edge are perpendicular to the side plate.

Further, the through holes on the first rib are evenly arranged along the length direction of the side plate.

Further, the battery module housing includes two oppositely arranged end plates, and the end plates are welded and connected to the side plates.

Further, a stop rib extending along the width direction of the side plate is formed on the inner side of the side plate, and a groove capable of accommodating the stop rib is formed on the end surface of the end plate. The end face of the side plate is welded to the inner side of the side plate, so that the stop rib is accommodated in the groove, and/or; The end surface of the end plate is welded to the concave portion.

Further, the first rib and the side plate and the second rib and the side plate are integrally formed parts.

Further, the first rib and the side plate and the second rib and the side plate are extruded parts.

Compared with the prior art, in the battery module housing of the present invention, since the first protruding edge and the second protruding edge are arranged on different side plates of the battery module housing, the first protruding edge and the second protruding edge are Corresponding through holes are provided on the edges, and the first protruding edge and the second protruding edge are parallel to each other and staggered along the width direction of the side plate, so that in the battery pack with a plurality of battery modules, the The battery modules of the battery module housing can be arranged in the form of two adjacent battery modules facing opposite sides, so that the first protruding edge of one of the two battery modules and the second protruding edge of the other can be along the The side plates are aligned in the width direction, so that the first rib of one and the through holes on the second rib of the other are aligned, and the two batteries can be connected by using the fasteners to penetrate the through holes on the two. The module is connected to the lower casing of the battery pack, thereby improving the ability of the battery pack and the battery module to resist extrusion and collision, making the arrangement between the battery modules more compact, and saving the internal space of the battery pack.

Another object of the present invention is to provide a battery module, the battery module includes a battery cell and the battery module casing as described above, and the battery core is arranged in the battery module casing.

A third aspect of the present invention provides a battery pack, the battery pack includes a fastener, a lower casing and the above-mentioned battery module, and an upwardly protruding inter-module mounting beam is formed on the lower casing , a mounting hole is formed on the mounting beam between the modules, and a plurality of the battery modules are arranged side by side so that the mounting hole on the mounting beam between the same modules and the first rib of one battery module The through hole of the battery module is aligned with the through hole on the second rib of another adjacent battery module, and the fastener penetrates the through hole of the first rib and the through hole of the second rib. holes and eventually connect into the mounting holes.

A final aspect of the present application also provides an automobile, which includes the above-mentioned battery pack.

The advantages of the battery module, the battery pack and the automobile and the above-mentioned battery module housing are the same as compared to the prior art, which will not be repeated here.

Other features and advantages of the present invention will be described in detail in the detailed description section that follows.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the schematic embodiments of the present invention and descriptions thereof are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic diagram of a battery module according to an embodiment of the present invention;

2 is a schematic diagram of the connection of two battery modules according to an embodiment of the present invention;

3 is a schematic diagram of a side plate of the battery module of FIG. 1;

4 is a schematic diagram of an end plate of the battery module of FIG. 1;

5 is a schematic diagram of the connection between the end plate and the side plate of the battery module according to the embodiment of the present invention;

6 is a schematic diagram of the connection between the end plate and the side plate of the battery module according to another embodiment of the present invention;

7 is a schematic diagram showing the connection between the end plate and the side plate of the battery module according to another embodiment of the present invention.

Description of reference numbers:

10-First convex edge 20-Second convex edge 30-Side plate 31-Stopping edge 32-Concave part

40-end plate 41-groove 42-weight reduction structure 50-installation beam between modules

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is conflict.

The present invention provides a battery module case. As shown in FIG. 1 , the battery module case includes a first rib 10 , a second rib 20 and two opposite side plates 30 . A rib 10 and the second rib 20 are respectively disposed on different side panels 30 and extend along the length direction of the side panel 30 , the first rib 10 and the second rib 20 Corresponding through-holes are provided on the top, the first rib 10 and the second rib 20 are parallel to each other and staggered in the width direction of the two side plates 30 .

Compared with the prior art, in the battery module case of the present invention, since the first rib 10 and the second rib 20 are arranged on different side plates 30 of the battery module case, the first rib and the Corresponding through holes are provided on the second protruding edges, and the first protruding edges and the second protruding edges are parallel to each other and staggered along the width direction of the side plate 30 . As shown in FIG. 2 , in a battery pack with a plurality of battery modules, the battery module with the battery module housing provided by the present application can be arranged in the form of two adjacent battery modules facing each other, so that the two adjacent battery modules The first rib of one of the battery modules and the second rib of the other can be aligned along the width direction of the side plate, so that the first rib of one and the second rib of the other The through holes are aligned, and the two battery modules can be connected to the lower shell of the battery pack by using the through holes of the fasteners through the two, thereby improving the resistance of the battery pack and the battery module to extrusion and collision. capacity, and makes the arrangement between the battery modules more compact, saving the internal space of the battery pack.

In the embodiments shown in FIGS. 1 and 2 of the present application, the battery module casing is a common cuboid casing, the end plate and the side plate of the battery module casing are perpendicular, the two side plates are parallel to each other, and the two end plates Also parallel to each other, the first rib and the second rib are vertically arranged on the two side plates, respectively. However, the present application is not limited to this. The first protruding rib and the second protruding rib do not necessarily have to be perpendicular to the side plate, and other shapes of battery module housings are also within the protection scope of the present application.

In addition, the first rib and the side plate on which the first rib is installed, and the second rib and the side plate on which the second rib is installed are integrally formed parts, preferably extruded parts, for example, a hot extrusion forming process is used, The hot extrusion process has the advantage of better molding. However, the present invention is not limited to this, and other common integral forming methods, such as stamping forming, can also be used.

A second aspect of the present application provides a battery module, the battery module includes a battery cell and the battery module housing as described above, and the battery cell is disposed in the battery module housing; in addition, the present application also provides A battery pack, the battery pack includes fasteners, a lower casing and a plurality of battery modules as described above, as shown in FIG. 2 , an upwardly protruding inter-module mounting beam is formed on the lower casing 50. Mounting holes are formed on the inter-module mounting beam 50, and a plurality of the battery modules are arranged side by side so that the mounting holes on the same inter-module mounting beam 50 and the first battery module The through hole of one rib 10 is aligned with the through hole on the second rib 10 of another adjacent battery module, and the fastener penetrates the through hole of the first rib and the second rib. The two rib through holes are finally connected to the mounting holes. Wherein, the inter-module mounting beam 50 and the lower casing of the battery pack can be configured as an integral molded part, so that the battery module and the lower casing of the battery pack can form a stable connection.

The fasteners can be bolts or screws, and a plurality of through holes are uniformly arranged along the length direction of the first rib 10 and the second rib 20, so the first rib 10 of one of the two adjacent battery modules The connection with the second rib 20 of the other is performed by a plurality of fasteners, which ensures the reliability of the connection. More preferably, the inter-module mounting beam 50 can abut against the lower one of the first rib 10 and the second rib 20, so as to provide better support for the battery module.

FIG. 1 shows that the battery module housing includes an end plate 40 and a side plate 30. The end plate 40 and the side plate 30 can be connected by laser welding, that is, the end face of the end plate is connected to the inner side of the side plate by laser welding. In the process of laser welding the end plate 40 to the side plate 30 , if the operation is not standardized, the laser may irradiate the cells inside the battery module through the welding seam between the end plate 40 and the side plate 30 .

To avoid this from happening. Referring to the structure shown in FIG. 3 , a stopper rib 31 is formed on the inner side of the side plate 30 , the stopper rib 31 is respectively disposed at both ends of the side plate 30 along the length direction, and the stopper edge 31 is along the width direction of the side plate The length of the stop rib 31 is slightly smaller than the width of the side plate 30 in order to avoid affecting the rounded corners provided on both ends of the side plate along the width direction; on the other hand, the end surface of the end plate 40 is formed with a stop The groove 41 of the groove 31, Fig. 5 shows the groove 41 opened on the end surface of the end plate, wherein the end plate is formed with a weight reduction structure 42 perpendicular to the end surface of the end plate, of course, the weight reduction structure 42 of the end plate is formed It can also be arranged parallel to the end face of the end plate.

Fig. 5 shows an embodiment of the connection between the end plate and the side plate, that is, the inner side of the side plate is provided with a stop rib 31, and the end surface of the end plate is provided with a groove 41, which is connected to the end plate by laser welding. The inner side of the side plate, so that the stop rib 31 is accommodated in the groove 41 of the end plate, so that the laser during laser welding will be stopped by the stop rib 31 after passing through the welding seam, so as to prevent the laser from irradiating the battery module. 's battery.

Fig. 6 shows another embodiment of the connection between the end plate and the side plate, that is, concave parts 32 are formed on both ends of the inner side of the side plate along the length direction, the end surface of the end plate is in contact with the concave parts 32, and the side plate is in the The thickness of the concave portion 32 is smaller than that of other parts, and the laser beam passing through the welding seam during laser welding will be blocked by the sidewall of the concave portion 32, thereby preventing the laser from irradiating the cells of the battery module.

Fig. 7 shows another embodiment of the connection between the end plate and the side plate, which can be regarded as a combination of the above two embodiments, so that the laser is double-blocked, which greatly avoids the laser irradiating the battery module. Batteries.

The last aspect of the present invention also provides an automobile, which includes the above-mentioned battery pack.

The above descriptions are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the within the scope of protection of the present invention.

Claims (10)

1. a kind of battery modules shell, which is characterized in that the battery modules shell includes the first fin (10), the second fin (20) and two side plates (30) being oppositely arranged, first fin (10) and second fin (20) are separately positioned on difference The side plate (30) on and extend along the length direction of the side plate (30), first fin (10) and second fin (20) it is provided with corresponding through-hole on, first fin (10) and second fin (20) are parallel to each other and described in two It is staggered in the width direction of side plate (30).

2. battery modules shell according to claim 1, which is characterized in that first fin (10) and described second convex Rib (20) is perpendicular to the side plate (30).

3. battery modules shell according to claim 1, which is characterized in that through-hole on first fin (10) along The length direction of the side plate (30) is evenly distributed.

4. battery modules shell according to claim 1, which is characterized in that the battery modules shell includes two opposite The end plate (40) of setting, the end plate (40) are welded to connect the side plate (30).

5. battery modules shell according to claim 4, which is characterized in that be formed on the medial surface of the side plate (30) The backstop rib (31) extended along the width direction of the side plate (30), the end face of the end plate (40) be formed with can accommodate it is described The end face of the groove (41) of backstop rib (31), the end plate (40) is welded in the medial surface of the side plate (30), so that described stop Gear rib (31) is contained in the groove (41), and/or；The both ends along its length of the medial surface of the side plate (30) are formed Have recess portion (32), the end face of the end plate (40) is welded in the recess portion (32).

6. battery modules shell described in any one of -5 according to claim 1, which is characterized in that first fin (10) It is integrally formed part with the side plate (30) and second fin (20) and the side plate (30).

7. battery modules shell according to claim 6, which is characterized in that first fin (10) and the side plate (30) and second fin (20) and the side plate (30) are extruded profile.

8. a kind of battery modules, which is characterized in that the battery modules include described in any one of battery core and claim 1-7 Battery modules shell, the battery core is arranged in the battery modules shell.

9. a kind of battery pack, which is characterized in that the battery pack includes described in fastener, lower case and multiple claims 8 Battery modules, be formed with mounting rail (50) between the mould group to raise upward, mounting rail (50) between the mould group in the lower case On be formed with mounting hole, the installation so that between the same mould group on mounting rail (50) is arranged side by side in multiple battery modules Described the second of the through-hole of first fin (10) of hole and a battery modules and another adjacent battery modules is convex Through-hole alignment on rib (20), the fastener is through the through-hole and the through-hole of second fin of first fin and final It is connected in the mounting hole.

10. a kind of automobile, which is characterized in that the automobile includes battery pack as claimed in claim 9.