CN220753649U - Battery module and battery pack - Google Patents

Abstract

The utility model discloses a battery module and a battery pack. Since a first hoisting hole penetrates the side plate along the thickness direction of the side plate and extends from a small side surface of an intermediate plate connected to the side plate into the intermediate plate, contact with the battery can be avoided when hoisting through the first hoisting hole, thereby avoiding scratches on the battery during hoisting. In addition, since the first hoisting hole penetrates the side plate and extends into the intermediate plate, the first hoisting hole has a certain depth, which increases the hoisting strength, thereby avoiding deformation of the hoisting position during hoisting, thereby improving the safety and reliability of the assembly process.

Description

A battery module and a battery pack

Technical Field

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

Background technique

In order to meet the demand for energy density, current battery modules are getting longer and longer. In related designs, an intermediate plate is provided in the middle of the long module to connect adjacent battery packs to improve the overall structural strength of the long module. When the battery module is placed in a box to assemble into a battery pack, the battery module needs to be hoisted into the box. In order to achieve hoisting, hoisting holes can be provided in the battery module. How to provide hoisting holes, especially the design of hoisting holes at the intermediate plate, has become a technical problem that needs to be solved urgently by those skilled in the art.

Utility Model Content

The embodiments of the utility model provide a battery module and a battery pack, which are used to realize the setting of hoisting holes, avoid scratching the battery during hoisting, improve the hoisting strength, and avoid deformation of the hoisting position.

In the first aspect, an embodiment of the utility model provides a battery module, comprising: two battery groups and a frame for fixing the battery groups, each of the battery groups comprising at least two batteries, the frame comprising a middle plate and a side plate, the middle plate being arranged between two adjacent battery groups, the middle plate comprising: a small side surface, a large side surface, a top surface and a bottom surface, the small side surface and the large side surface are both connected to the top surface and the bottom surface, the large side surface faces the battery group, the side plate is connected to the small side surface, and the frame has a first lifting hole, the first lifting hole penetrates the side plate along the thickness direction of the side plate, and extends from the small side surface connected to the side plate to the middle plate.

In a second aspect, an embodiment of the utility model provides a battery pack, comprising: a box body and a battery module as described in the first aspect, wherein the battery module is disposed in the box body.

The beneficial effects of the utility model are as follows:

A battery module and a battery pack provided by the embodiments of the utility model have a first lifting hole that penetrates the side plate along the thickness direction of the side plate and extends from the small side surface connected to the side plate to the middle plate. Therefore, when lifting through the first lifting hole, contact with the battery can be avoided, thereby avoiding scratches on the battery during lifting. Moreover, since the first lifting hole penetrates the side plate and extends to the middle plate, the first lifting hole has a certain depth, which increases the lifting strength, thereby avoiding deformation of the lifting position during lifting, thereby improving the safety and reliability of the assembly process, and the side plate does not need to be additionally designed to avoid the first lifting hole, that is, there is no need to additionally cut off the side plate body part, thereby ensuring the structural strength of the side plate.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a battery module provided in an embodiment of the present utility model;

FIG2 is an exploded schematic diagram of the middle plate and the side plate provided in an embodiment of the present utility model;

FIG3 is a partial enlarged schematic diagram shown in the dotted circle in FIG1;

FIG4 is a schematic diagram of the structure of the intermediate plate provided in an embodiment of the present utility model;

FIG5 is a schematic diagram of a middle plate and a side plate provided in an embodiment of the present utility model;

FIG6 is a schematic diagram of the structure of another battery module provided in an embodiment of the present utility model;

FIG. 7 is a schematic diagram of the structure of a battery pack provided in an embodiment of the present utility model.

Reference numerals:

10-battery pack, 20-frame, 21-middle plate, 21a-connecting side wall, 22-side plate, 23-outer end plate, 31-first lifting hole, 32-second lifting hole, 40-fastener, 50-protective plate, 110-box, 120-battery module, k1-groove, a1-small side, a2-large side, a3-top surface, a4-upper surface.

Detailed ways

The following will be combined with the accompanying drawings to describe in detail the specific implementation of a battery module and a battery pack provided by the embodiment of the utility model. It should be noted that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

The embodiment of the utility model provides a battery module, as shown in FIG1, which may include: at least two battery packs 10 and a frame 20 for fixing each battery pack 10, each battery pack 10 includes at least two batteries (not shown in FIG1), and the number of batteries included in each battery pack 10 may be the same or different, wherein the number of batteries included in each battery pack 10 may be set according to actual needs. It should be understood that FIG1 only shows an embodiment by way of example, but in actual situations, the number of battery packs 10 is not limited to the two shown in FIG1.

The frame 20 includes an intermediate plate 21 and a side plate 22, and the intermediate plate 21 and the side plate 22 can be fixedly connected by welding, clamping or bonding. Two side plates 22 can be provided, and the two side plates 22 are arranged at both ends of the battery module along the width direction (i.e., the x direction) of the battery module. The intermediate plate 21 is arranged between two adjacent battery packs 10, and at least one intermediate plate 21 can be provided; for example, when there are two battery packs 10, one intermediate plate 21 can be provided, and the intermediate plate 21 is arranged between the two battery packs 10, as shown in FIG1; when there are more than two battery packs 10, an intermediate plate 21 is provided between any two adjacent battery packs 10, and at this time, two or more intermediate plates 21 can be provided, which are not shown in the figure, and the number of intermediate plates 21 is the number of battery packs 10 minus one. In this way, each battery pack 10 can be separated by the intermediate plate 21, and each battery pack 10 can be fixed by each intermediate plate 21 and the side plate 22.

Furthermore, as shown in FIG2 , the middle plate 21 includes: a small side surface a1, a large side surface a2, a top surface a3 and a bottom surface. Due to viewing angle issues, the bottom surface is not shown in FIG2 , but the bottom surface can be considered as a surface that is arranged along the z direction in FIG2 corresponding to the top surface a3 and is located at the bottom of the middle plate 21. The small side surface a1 and the large side surface a2 are both connected to the top surface a3 and the bottom surface. The large side surface a2 can face the battery pack, and the side plate 22 is connected to the small side surface a1.

As shown in FIG. 1 and FIG. 2 , the frame 20 has a first hanging hole 31, which penetrates the side plate 22 along the thickness direction of the side plate 22 (i.e., the x direction shown in FIG. 1 ), and extends from the small side a1 connected to the side plate 22 to the middle plate 21. It should be understood that when there are two side plates 22, each side plate 22 is provided with a first hanging hole 31 at a position corresponding to the small side a1 of the middle plate 21. However, due to the problem of viewing angle, FIG. 1 only shows the first hanging hole 31 corresponding to one side plate 22, but this does not mean that the other side plate 22 is not provided with the first hanging hole 31. In this way, since the first hanging hole 31 extends into the middle plate 21, the first hanging hole 31 can have a certain depth, increase the hanging strength, and thus avoid deformation of the hanging position during hanging. On the other hand, the hanging device will not contact the battery when entering the first hanging hole 31, which can avoid scratching the battery during hanging, thereby improving the safety and reliability of the assembly process.

In some embodiments, the depth of the first lifting hole 31 in the middle plate 21 (i.e., the length of the first lifting hole 31 in the middle plate 21 along the x-direction in FIG. 1 ) can be set larger, or the first lifting hole 31 in the middle plate 21 can be made into a special shape, such as a corresponding shape designed according to the lifting device, so that the lifting device can be effectively inserted into the first lifting hole 31, thereby improving the lifting strength.

Of course, as shown in Figure 3, when a groove k1 is provided on the top surface a3 of the middle plate 21, the first lifting hole 31 can also be connected to the groove k1. This not only reduces the difficulty of making the first lifting hole 31, but also allows the lifting device to pass through the first lifting hole 31 and extend into the groove k1, thereby increasing the insertion depth of the lifting device and improving the stability of the lifting process.

The groove k1 can be used to accommodate the fastener 40, and the battery module can be fixed on other structures through the fastener 40. The arrangement of the groove k1 can prevent the fastener 40 from being higher than the top surface a3 of the middle plate 21, thereby reducing the height and volume of the battery module.

Furthermore, as shown in FIG4 , the side wall in the groove k1 that is connected to the first hanging hole is a connecting side wall 21a, and a notch is provided on the surface of the connecting side wall 21a facing the groove k1 (as shown in the dotted circle k2 in FIG4 ), and the notch can be used to avoid the fastener 40, improve the convenience of installing the fastener 40, and reduce the interference with the fastener 40. The specific shape of the notch is not limited here, and can be set according to the shape and type of the fastener 40, as well as factors such as structural strength. For example, the orthographic projection shape of the notch on the plane parallel to the top surface of the middle plate 21 can be set to a V-shape (as shown in FIG4 ), a semicircle or a semi-ellipse, so that the thickness of the connecting side wall 21a can present the characteristics of being thin in the middle and thick on both sides, so that not only can the fastener 40 be avoided, but also the strength reduction of the connecting side wall 21a can be avoided.

In some embodiments, as shown in FIG5 , the side panel 22 completely covers the corresponding small side surface a1, so as to provide more fixing space for fixing the middle panel and the side panel 22. For example, when the small side surface a1 is bonded to the side panel 22, the side panel 22 completely covers the small side surface a1, so that the entire small side surface a1 can be bonded to the side panel 22, thereby improving the fixing strength between the middle panel and the side panel 22. Further, the ratio of the area of the small side surface a1 to the reference area can be set to 50% to 85%, where the reference area is: the product of the maximum height d1 of the side panel 22 and the thickness d2 of the middle panel. The reason for this setting is: if the ratio of the area of the small side a1 to the reference area is too small, such as less than 50%, it means that the area used to fix the small side a1 and the side panel 22 is small. When the side panel 22 is longer, the side panel 22 may be broken due to the small fixing area; if the ratio of the area of the small side a1 to the reference area is too large, such as greater than 85%, it means that the area of the small side a1 is large and close to the reference area, which provides less space for the assembly of the middle panel and other structures, increasing the difficulty of assembly; therefore, setting the ratio of the area of the small side a1 to the reference area within an appropriate range can not only avoid the breakage of the side panel 22 and increase the reliability of the side panel 22, but also provide more space for assembly and reduce the difficulty of assembly.

Furthermore, as shown in FIG5 , the side plate 22 may be provided with assembly notches at positions corresponding to the middle plate, as shown in the dotted frame x1 and the dotted frame x2, and these assembly notches may provide assembly space for the installation of the battery module and other structures, thereby reducing the difficulty of assembly. The arrangement form of the assembly notches may be arranged according to the assembly method, and is not limited here.

In some embodiments, referring to FIG3 , the surface of the side panel 22 facing the top of the battery module can be considered as the upper surface a4 of the side panel 22 , and the minimum distance d3 between the first lifting hole 31 and the upper surface a4 of the side panel 22 can be set to 8 mm to 40 mm. This can avoid the upper part of the first lifting hole 31 (as shown in the dotted box x3 in FIG3 ) being insufficient in strength when d3 is too small, resulting in insufficient lifting strength. It can also avoid deformation of the lifting position during lifting, thereby improving the safety and reliability of the assembly process.

In some embodiments, as shown in FIG6 , in addition to the middle plate 21 and the side plate 22, the frame may also include an outer end plate 23 connected to the side plate 22. The outer end plate 23 may be arranged at the end of the battery module along the arrangement direction of each battery pack 10 (such as the y direction in FIG6 ); two outer end plates 23 may be provided and arranged at both ends of the battery module along the y direction, and each battery pack 10 is surrounded in the middle by two side plates 22 and two outer end plates 23 to achieve the fixation of the battery pack 10. Among them, the side plate 22 may extend from the side of one of the outer end plates facing the side plate 22, through the correspondingly connected small side surface, to the side of the other outer end plate facing the side plate 22, that is, the side plate 22 may be set as an integrated side plate 22, and two outer end plates and the middle plate 21 may be connected respectively through one side plate 22. In the case of simplifying the structure of the battery module, the steps of assembling the battery module may also be simplified, and the assembly efficiency of the battery module may be improved.

Furthermore, a first hoisting hole 31 may also be provided at the connection between the outer end plate 23 and the side plate 22 to provide multiple hoisting locations, thereby improving the stability of the hoisting process.

Further, as shown in FIG6 , the surface of the outer end plate 23 perpendicular to the arrangement direction (such as the y direction) of each battery pack 10 and the surface away from the battery pack 10 may be provided with a second hoisting hole 32, and the second hoisting hole 32 may be a blind hole, or of course a through hole. In this case, a protective plate 50 may be provided between the outer end plate 23 and the battery pack 10 to block the battery pack 10 and the hoisting device, thereby avoiding scratching the battery pack 10 when the hoisting device extends into the second hoisting hole 32. And through the provision of the second hoisting hole 32, the battery module has multiple hoisting holes, further increasing the hoisting sites, so that the hoisting device can hoist the battery module from multiple angles and multiple positions to improve the hoisting stability.

It should be understood that the shapes of the first hoisting hole 31 and the second hoisting hole 32 are not limited to those shown in FIG. 6 , and can be set according to factors such as the shape of the hoisting device, and are not limited here.

Based on the same utility model concept, an embodiment of the utility model provides a battery pack, as shown in FIG. 7 , which may include a box body 110 and a battery module 120 as described above, and the battery module 120 may be disposed in the box body 110 .

The box body may include a bottom plate and a beam, and the battery module may be fixed on the bottom plate or on the beam. The battery module and the bottom plate or the battery module and the beam may be fixed by fasteners provided in the groove of the middle plate. Of course, the end plate and/or the side plate may also be fixed to the bottom plate or the beam by fasteners, thereby increasing the fixing points of the battery module and the box body and improving the stability of the battery module fixed in the box body.

In some embodiments, in addition to the box and battery module, the battery pack may also include other structures for realizing the functions of the battery pack, such as but not limited to a battery management system and a high-voltage distribution box, etc. The specific configuration can be based on actual needs and is not limited here.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A battery module, characterized in that it comprises: at least two battery packs and a frame for fixing the battery packs, each of the battery packs comprises at least two batteries, the frame comprises a middle plate and a side plate, the middle plate is arranged between two adjacent battery packs, the middle plate comprises: a small side surface, a large side surface, a top surface and a bottom surface, the small side surface and the large side surface are both connected to the top surface and the bottom surface, the large side surface faces the battery pack, the side plate is connected to the small side surface, and the frame has a first hanging hole, the first hanging hole penetrates the side plate along the thickness direction of the side plate, and extends from the small side surface connected to the side plate to the inside of the middle plate. 2. The battery module according to claim 1, characterized in that the side panel completely covers the correspondingly connected small side surface. 3. The battery module according to claim 2, characterized in that the ratio of the area of the small side surface to the reference area is 50% to 85%, and the reference area is: the product of the maximum height of the side plate and the thickness of the middle plate. 4. The battery module according to claim 1, characterized in that a minimum distance between the first hanging hole and a surface of the side plate facing the top of the battery module is 8 mm to 40 mm. 5. The battery module according to claim 1, characterized in that the top surface of the intermediate plate has a groove, and the groove is used to set a fastener; the first lifting hole is connected to the groove. 6. The battery module according to claim 5, characterized in that the side wall in the groove connected to the first lifting hole is a connecting side wall, and a notch is provided on the surface of the connecting side wall facing the groove, and the notch is used to avoid the fastener. 7 . The battery module according to claim 6 , wherein the orthographic projection shape of the notch on a plane parallel to the top surface is V-shaped, semicircular or semi-elliptical. 8. The battery module according to any one of claims 1 to 7, characterized in that the frame further comprises outer end plates, the outer end plates are arranged at the ends of the battery modules along the arrangement direction of each of the battery packs, and the side plates are also connected to the outer end plates. 9. The battery module according to claim 8, characterized in that two outer end plates are provided and are respectively arranged at two ends of each battery group along the arrangement direction; The side plate extends from a side surface of one of the outer end plates facing the side plate, through the correspondingly connected small side surfaces, to a side surface of the other outer end plate facing the side plate. 10. A battery pack, comprising: a box and a battery module according to any one of claims 1 to 9, wherein the battery module is arranged in the box.