CN218731531U - Battery module and battery pack - Google Patents

Abstract

The utility model discloses a battery module and battery package. The battery module includes: an end plate; the side plate is connected with the end plate and forms an accommodating space with the end plate in an enclosing mode, the side plate comprises a body and a fixed side lug which is integrally formed with the body, the fixed side lug is formed by bending part of the body towards one side far away from the battery, and the fixed side lug is used for being connected with the battery box body; and the single batteries are accommodated in the accommodating space. The utility model provides a curb plate among the battery module bends the shaping with the body of part curb plate and goes out fixed side ear to fixed side ear and body integrated into one piece form simple process, the shaping of being convenient for, and fixed side ear can increase the intensity of body itself.

Description

Battery module and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery module and battery package.

Background

Along with the development of economy, the attention degree to the environmental problem is constantly promoted, and the electric automobile that adopts the battery package as energy supply's popularization is also higher and higher, and battery module is as the core spare part in the battery package, and its safety characteristic is vital.

The battery module includes battery cell, end plate and curb plate, and end plate and curb plate enclose to close the accommodating space who forms battery cell, and a plurality of battery modules are installed in the battery box in order to constitute the battery package again.

In the related art, when the battery module holder is placed in the battery box, the connection structure with the battery box is lacked, resulting in insufficient stability of the entire battery pack.

SUMMERY OF THE UTILITY MODEL

For solving at least one problem that exists among the above-mentioned prior art, according to the utility model discloses a first aspect provides a battery module, includes: an end plate; the side plate is connected with the end plate and forms an accommodating space with the end plate in an enclosing mode, the side plate comprises a body and a fixed side lug which is integrally formed with the body, the fixed side lug is formed by bending part of the body towards one side far away from the battery, and the fixed side lug is used for being connected with a battery box body; and the single batteries are accommodated in the accommodating space.

Like this, set up the curb plate into the mode that includes the body and with body integrated into one piece's fixed side ear, the shaping that bends out fixed side ear is divided into to fixed side ear and body integrated into one piece form simple process, the shaping of being convenient for, and fixed side ear can increase the intensity of body itself, fixed side ear is used for being connected with the box of battery package, thereby has increased the stability behind the shaping of whole battery package.

According to a second aspect of the present invention, there is provided a battery pack, comprising: a box body; in the battery module, the fixed side lug on the side plate is connected with the box body.

Like this, have fixed side ear through integrated into one piece on the curb plate at battery module, fixed side ear overlap joint is connected with the battery box on the box to guarantee the installation stability of whole battery package.

Drawings

Fig. 1 is a schematic structural view of a battery module according to a first embodiment of the present invention;

FIG. 2 is a schematic structural view of the side panel of FIG. 1;

FIG. 3 is a front view of the side plate of FIG. 2;

FIG. 4 is a right side view of the side plate of FIG. 2;

FIG. 5 is a top view of the side plate of FIG. 2;

FIG. 6 is an enlarged schematic view at I of FIG. 1;

FIG. 7 is a schematic structural view of the side plate of FIG. 1 without the fixed side ears formed thereon;

fig. 8 is a schematic structural view of a side plate according to another embodiment of the present invention;

fig. 9 is a schematic structural view of a side plate according to yet another embodiment of the present invention;

fig. 10 is a schematic structural view of a battery pack according to a second embodiment of the present invention;

fig. 11 is an enlarged schematic view at II in fig. 10.

Wherein the reference numerals have the following meanings:

100-side plate, 10-body, 11-through hole, 111-upper sub-through hole, 112-lower sub-through hole, 1121-first portion, 1122-second portion, 12-hem, 20-fixed side tab, 21-upper lip, 211-first arc transition portion, 212-first vertical portion, 213-first horizontal attachment portion, 214-third arc transition portion, 215-second vertical portion, 216-third horizontal attachment portion, 22-lower lip, 221-buckle tab, 222-second arc transition portion, 223-second horizontal attachment portion, 224-fourth arc transition portion, 225-third vertical portion, 226-fourth horizontal attachment portion, 23-mounting hole, 30-upper to-be-bent structure, 40-lower to-be-bent structure, 200-battery module, 220-end plate, 230-insulating film, 300-battery pack, 310-box, 320-beam.

Detailed Description

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

In the description of the present invention, 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 orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 9, a battery module 200 according to an embodiment of the present invention includes a single battery, an end plate 220 and a side plate 100.

Referring to fig. 1 and 2, the side plate 100 is connected to the end plate 220 and encloses with the end plate 220 to form an accommodating space 240, the side plate 100 includes a body 10 and a fixed side lug 20 integrally formed with the body, the fixed side lug 20 is formed by bending a part of the body 10 towards a side away from the battery, and the fixed side lug 20 is used for connecting with a cross beam 320 in a box body 310 of the battery pack 300; the plurality of unit batteries are accommodated in the accommodating space 240.

Thus, in the above battery module 200, the side plate 100 is configured to include the body 10 and the fixed side lug 20 integrally formed with the body 10, that is, a part of the side plate 100 is bent to form the fixed side lug 20, so that the fixed side lug 20 and the body 10 are integrally formed, the forming process is simple, the forming is convenient, the fixed side lug 20 can increase the strength of the body 10, the fixed side lug 20 is used for being connected with the box body 310 of the battery pack 300, and the stability of the whole battery pack 300 after being formed is increased.

Referring to fig. 2 to 4 and 6, in an embodiment of the present invention, in order to ensure the strength of the fixed side lug 20 when being mounted on the cross beam 320 of the box 310, the fixed side lug 20 includes an upper lip 21 and a lower lip 22 which are attached to each other, so that the fixed side lug 20 is configured to be composed of two parts in a manner of the upper lip 21 and the lower lip 22 which are attached to each other, and are attached to each other to ensure the mounting strength of the whole fixed side lug 20, thereby ensuring the structural strength when being mounted on the cross beam 320 to ensure the mounting stability of the battery pack 300. It can be understood that, in order to ensure the structural strength of the whole fixed side ear 20, after the upper lip 21 and the lower lip 22 are in the attached state, they can be integrated by welding, so as to further ensure the installation strength of the fixed side ear 20.

Wherein, in order to further guarantee the structural strength of whole fixed side ear 20, go up lip 21 and lower lip 22 and connect through the joint for both become an organic whole, regard as an organic whole after with both joints and install with crossbeam 320, in order to increase the joint strength with crossbeam 320.

Specifically, referring to fig. 2 and 5, the fixing side ear 20 of the present embodiment is provided with a mounting hole 23, that is, the upper lip 21 and the lower lip 22 are provided with a communicating mounting hole 23, and the mounting hole 23 is used for connecting with the cross beam 320 through a fastener, for example, through a bolt.

Specifically, referring to fig. 2 to 6, in order to facilitate the snap connection between the upper lip 21 and the lower lip 22, in the embodiment, the lower lip 22 is integrally formed with a fastening tab 221 toward the upper lip 21, the fastening tab 221 is used to be fastened to the surface of the upper lip 21, so that the upper lip 21 and the lower lip 22 are conveniently connected into a whole by integrally forming the fastening tab 221 on the lower lip 22, the structure forming process of the whole fixed side tab 20 is simple, the forming is convenient, after the upper lip 21 and the lower lip 22 are formed, the fastening tab 221 is formed on the lower lip 22, so that the fastening tab 221 is fastened to the surface of the upper lip 21, and the upper lip 21 and the lower lip 22 are formed into a whole; meanwhile, because the whole fixed side lug 20 needs to be lapped on the cross beam 320, enough contact area needs to be reserved between the fixed side lug and the cross beam 320, the flatness of the joint of the lower lip 22 and the cross beam 320 is ensured in a mode that the buckling lug 221 is formed on the lower lip 22 in the direction of the upper lip 21, namely, the lower lip 22 can be ensured to have enough contact area with the cross beam 320, so that the installation stability of the lower lip and the cross beam 320 is ensured, and the fixation firmness of the lower lip and the cross beam is improved.

Referring to fig. 2 and 3 and fig. 5 and 6, in order to facilitate the bending formation of the fastening lug 221, the width of the fastening lug 221 in the length direction of the body 10 is smaller than the width of the lower lip 22 in the length direction of the body 10, so that the fastening lug 221 with a smaller width can be formed by pressing; or in other embodiments, in order to ensure the stability of the engagement between the upper lip 21 and the lower lip 22, the width of the tab 221 along the length direction of the body 10 may be equal to the width of the lower lip 22 along the length direction of the body 10, so as to increase the contact area of the tab 221 and the upper lip 21, thereby increasing the connection stability between the upper lip 21 and the lower lip 22.

Specifically, in order to facilitate heat dissipation of the battery after the side plate 100 is used to mount the battery, the body 10 in this embodiment is formed with the through hole 11 at the bent position, so that the battery in use can be dissipated through the through hole 11 by forming the through hole 11 at the position of the bent portion on the body 10, thereby ensuring the safety of the battery module 200 in use.

Specifically, before bending the body 10, the position to be bent is firstly cut into the body 10 so as to form a gap between the cut part to be bent and the body 10, then the cut part to be bent is bent, and a hollowed-out part formed on the body 10 after bending is a through hole 11, so that the battery module 200 is cooled through the through hole 11, meanwhile, the hollowed-out part can avoid the problem that the heat is mutually transferred by contacting with the adjacent battery modules 200, thermal runaway can be inhibited, and the safety performance of the battery pack 300 is improved; meanwhile, in the embodiment, the bending forming mode is adopted, so that the side plate 100 does not need to be additionally perforated, the working procedures are reduced, and the efficiency is improved.

Specifically, in this embodiment, a stamping process is adopted to the to-be-bent part to be cut out to form the upper lip 21 and the lower lip 22 respectively, so that a die and stamping equipment are adopted to apply pressure to the to-be-bent part, and the to-be-bent part is subjected to plastic deformation, so that the formed upper lip 21 and the formed lower lip 22 are obtained, and therefore, the bending mode in this embodiment is simple in forming process and convenient to operate.

Specifically, referring to fig. 2, 3 and 6, corresponding to the separation structure of the upper lip 21 and the lower lip 22, the through hole 11 formed in the present embodiment includes an upper sub through hole 111 and a lower sub through hole 112 which are separately arranged, the upper lip 21 is arranged on the side of the body 10 close to the upper sub through hole 111, and the lower lip 22 is arranged on the side of the body 10 close to the lower sub through hole 112. Specifically, the upper sub through hole 111 is formed after the upper lip 21 is formed by bending, and the lower sub through hole 112 is formed after the lower lip 22 is formed by bending, that is, the upper sub through hole 111 and the lower sub through hole 112 correspond to the shapes of the upper lip 21 and the lower lip 22 before bending, respectively, so that heat of the battery module 200 can be dissipated through the upper sub through hole 111 and the lower sub through hole 112.

Specifically, referring to fig. 7, because the fixed side lug 20 in the present embodiment includes the upper lip 21 and the lower lip 22, the upper structure to be bent 30 and the lower structure to be bent 40 are cut from the body 10 before bending, the upper structure to be bent 30 is square, and the upper lip 21 is formed after stamping, bending and forming; since the lower structure to be bent 40 needs to form the fastening lug 221, the lower structure to be bent 40 in this embodiment has an inverted convex shape, so that the protruding portion of the lower structure to be bent 40 can be stamped to form the fastening lug 221.

When the upper structure to be bent 30 and the lower structure to be bent 40 are bent to form the upper lip 21 and the lower lip 22, two embodiments are included:

specifically, referring to fig. 6, in a first bending embodiment, the upper lip 21 is formed by bending a part of the body downward, and has a first vertical portion 212 and a first horizontal attaching portion 213; lower lip 22 is formed by bending part body 10 towards the horizontal side of keeping away from the battery, and treat that bending structure 30 part has bent down and has carried out horizontal bending again on the same time, treats that bending structure 40 has only carried out horizontal bending towards the one side of keeping away from the battery down to with treat that the shape after bending of bending structure 30 is laminated mutually on, thereby make under this time treat that bending structure 40 forms lower lip 22 and have with the bigger area of contact of crossbeam.

In order to ensure the structural strength of the upper lip 21, the first vertical portion 212 in this embodiment is attached to the surface of the body 10, that is, when the portion of the upper structure 30 to be bent is bent downward, the upper structure is bent vertically and then horizontally along the surface of the body 10.

Specifically, the upper lip 21 formed by the bending mode includes a first arc transition portion 211, a first vertical portion 212 and a first horizontal attaching portion 213 which are connected in sequence, the first arc transition portion 211 is connected to the body 10, the first vertical portion 212 is formed by the first arc transition portion 211 towards the direction towards the lower lip 22, and the first horizontal attaching portion 213 is formed by the extension of one end of the first vertical portion 212 far away from the body 10 towards the horizontal direction.

Specifically, the lower lip 22 formed by the bending method includes a second arc-shaped transition portion 222 and a second horizontal attaching portion 223, the second horizontal attaching portion 223 is formed by horizontally extending the second arc-shaped transition portion 222 in a direction away from the body 10, and the fastening lug 221 is bent in a direction toward the body 10; the upper surface of the second horizontal attaching portion 223 is attached to the lower surface of the first horizontal attaching portion 213, and the fastening lug 221 is fastened to the upper surface of the first horizontal attaching portion 213, so as to ensure the stability of the upper structure to be bent 30 and the lower structure to be bent 40 after bending.

Specifically, after being molded in this manner, the lower surface of the second horizontal attaching portion 223 is adapted to be lapped on the surface of the cross member 320, so as to have a sufficient contact area with the cross member 320.

Referring to fig. 8, in a second bending manner, the upper lip 21 is formed by bending a part of the body downward, and includes a second vertical portion 215 and a third horizontal attaching portion 216; the lower lip 22 is formed by bending part of the body upwards, the third vertical part 225 and the fourth horizontal attaching part 226 are attached to the third horizontal attaching part 216 and the fourth horizontal attaching part 226, the fourth horizontal attaching part 226 is attached to the surface of the cross beam 320, and the third horizontal attaching part 216 and the fourth horizontal attaching part 226 are connected with the cross beam 320 through fasteners, so that the connection strength of the lower lip and the cross beam 320 is increased.

Specifically, when the upper lip 21 is formed by bending, the upper structure 30 to be bent is bent downward, and then a part of the upper structure is bent in the horizontal direction; when the lower lip 22 is formed by bending, the lower structure 40 to be bent is bent upward and then bent in the horizontal direction.

In addition, in order to ensure the structural strength of the upper lip 21 and the lower lip 22, when bending, the upper to-be-bent structure 30 is partially bent downward and attached to the surface of the body 10, that is, the second vertical portion 215 is attached to the surface of the body 10; the lower structure 40 is bent upward to fit the surface of the body 10, that is, the third vertical portion 225 fits the surface of the body 10, so that the body 10 supports the second vertical portion 215 and the third vertical portion 225.

Specifically, the upper lip 21 formed by the present method includes a third arc-shaped transition portion 214, a second vertical portion 215 and a third horizontal fitting portion 216, the third arc-shaped transition portion 214 is connected to the body 10, the second vertical portion 215 is formed by the third arc-shaped transition portion 214 extending downward, and the third horizontal fitting portion 216 is formed by extending one end of the second vertical portion 215 far away from the third arc-shaped transition portion 214 in the horizontal direction.

Specifically, the lower lip 22 formed by the present method includes a fourth arc-shaped transition portion 224, a third vertical portion 225 and a fourth horizontal attaching portion 226, the fourth arc-shaped transition portion 224 is connected to the body 10, the third vertical portion 225 is formed by extending the fourth arc-shaped transition portion 224 upwards, and the fourth horizontal attaching portion 226 is formed by extending one end of the third vertical portion 225 far away from the fourth arc-shaped transition portion 224 towards the horizontal direction. Specifically, after being molded in this manner, the lower surface of the fourth horizontal attaching portion 226 is adapted to overlap the surface of the cross member 320, so as to have a sufficient contact area with the cross member 320.

Referring to fig. 9, a third bending manner is shown, which is opposite to the first embodiment, the upper structure to be bent 30 is bent to form a horizontal joint portion, and the lower structure to be bent 40 is bent in the direction of the upper structure to be bent 30 to be jointed with the horizontal joint portion formed by the upper structure to be bent 30, and a vertical portion is formed. Therefore, in the specific application of the three bending modes, the bending mode can be adjusted according to the height of the cross beam 320, so that the height of the side ear can be adjusted.

Since the lower lip 22 needs to overlap the cross member 320 to be connected with the cross member 320, and therefore needs to have a sufficient contact area with the cross member 320, it is preferable in this embodiment that the first bending is performed to form the upper lip 21 and the lower lip 22, and only the lower structure 40 to be bent is bent away from the body 10 to form the horizontal lower lip 22. In addition, under the condition that the height of the side plate 100 does not need to be adjusted, after the first mode is bent to form the upper lip 21 and the lower lip 22, the first vertical portion 212 has a larger shielding surface corresponding to the position of the body 10, when the upper lip 21, the lower lip 22 and the cross beam 320 are installed through bolts, the bolts are arranged from top to bottom, the corresponding shielding surfaces can shield the screwing tool, the screwing tool is prevented from scratching the insulating film 230 on the inner side of the side plate 100 during operation to cause insulation failure, and screws can be prevented from falling into the through holes 11 to a certain extent in the process of screwing the bolts.

Referring to fig. 3, in the embodiment, a width of the upper to-be-bent structure 30 along the length direction of the body 10 is L2, correspondingly, a width of the upper sub through hole 111 along the length direction of the body 10 is L2, a height of the upper sub through hole 111 along the height direction of the body 10 is H2, a width of the lower to-be-bent structure 40 along the length direction of the body 10 is L3, correspondingly, a width of the lower sub through hole 112 along the length direction of the body 10 is L3, and a distance between the upper sub through hole 111 and the lower sub through hole 112 is H1, where L2= L3.

Referring to fig. 4, in an embodiment of the present invention, the height of the body 10 is H, and the range of the H1 is set as follows: 8%H ≦ H1 ≦ 12 ≦ H, so that the connection strength of the upper lip 21 and the lower lip 22 at the connection point on the body 10 is sufficient by this setting of H1, ensuring the mounting strength of the entire fixed side ear 20. Meanwhile, 8%H ≦ H1 ≦ 12H, specifically, H1 may be 8H, 9H, 10H, 11H, 12H, such that the size of H1 is within a proper range, and it is avoided that when the range of H1 is too small, for example, when the H1 width is less than 8%H, the root stress is too large and the supporting force of the attachment surface of the fixing side lug 20 is not sufficient, for example, when H1 is greater than 12%, the remaining height of the body 10 in the H1 direction is reduced, the attachable area of the side plate 100 at the position is reduced after the fixing side lug 20 is punched out, and the strength requirement for attaching and fixing the cell to the fixing side lug 20 of the side plate 100 cannot be ensured.

Referring to fig. 3, in the present embodiment, the widths of the upper lip 21 and the lower lip 22 in the length direction of the body 10 are both L1, the widths of the upper sub through hole 111 and the lower sub through hole 112 in the length direction of the body 10 are both L2, and the thicknesses of the upper lip 21 and the lower lip 22 are both D, that is, the thickness of the body 10 is D, wherein L1= L2-1.5D, so that the thickness of the body 10 is limited, so that the thickness of the side plate 100 is within an appropriate range, and when the thickness of the body 10 is large, bending is not facilitated due to too small distance between the upper structure 30 to be bent and the lower structure 40 to be bent relative to the body 10, and meanwhile, when the thickness of the side plate 100 is within an appropriate range, the distance between the upper structure 30 to be bent and the lower structure 40 to be bent relative to the body 10 is small, bending can be performed, so that the setting manners of L1, L2, and D are convenient for the bending of the upper lip 21 and the lower lip 22, and ensure the strength of the upper lip and the bending of the lower lip 22.

Referring to fig. 3 and 4, in an embodiment of the present invention, the height of the body 10 is H, the distance between the upper sub through hole 111 and the lower sub through hole 112 is H1, the height of the upper sub through hole 111 is H2, the lower sub through hole 112 includes a first portion 1121 and a second portion 1122, the first portion 1121 is formed by bending a part of the body to form the lower lip 22, the second portion 1122 is formed by bending a part of the body to form the tab 221, and the height of the first portion 1121 is H3, wherein H1+ H2+ H3 is not more than 0.7H, that is, the height of the corresponding upper structure 30 to be bent is H2, and the height of the main body of the lower structure 40 to be bent is H3, so that the body 10 at the non-bent position can have a sufficient bonding area with the battery cell after the obtained fixing side tab 20 is bent by setting the value, so as to ensure the bonding stability of the non-bent body 10 and the battery cell.

Wherein, H3 ≈ H1+ H2, thereby facilitating the processing and forming of the upper lip 21 and the lower lip 22, and ensuring the connection strength between the two at the body 10 with the H1 height.

In addition, referring to fig. 4, the distance between the lower surface of the lower lip 22 and the bottom of the main body 10 is H4, H4 is greater than or equal to 0.4H and less than or equal to 0.68H, specifically, H4 can be 0.4h,0.45h,0.5h,0.55h,0.6h,0.68h, and by this arrangement, the position of the fixed side lug 20 is close to the middle position of the main body 10, so as to avoid increasing the height of the fixed cross beam 320 of the box 310 when the position of the fixed side lug 20 is set higher, thereby increasing the weight of the box 310; it is also avoided that the lower position of the fixing side lug 20 reduces the height of the cross beam 320, which affects the bending and torsional rigidity of the cross beam 320, and further reduces the natural frequency of the whole battery pack 300, and increases the risk of structural failure of the battery pack 300.

Referring to fig. 5, the diameter of the mounting hole 23 in this embodiment is d, and the width of the upper lip 21 and the lower lip 22 in the direction away from the body 10 is w1, that is, the width of the first horizontal attaching portion 213 and the second horizontal attaching portion 223 in this embodiment in the direction away from the body 10 is w1, wherein w1 is greater than or equal to 2d +4mm and less than or equal to 3d, so that the mounting stability of the upper lip 21, the lower lip 22 and the cross beam 320 is ensured by the diameter of the mounting hole 23.

In addition, in one embodiment, w1 is more than or equal to 2d +4mm and less than or equal to H2, and L1 is more than or equal to 2d +4mm and less than or equal to L2-9mm, so that the connection strength of the body 10 and the fixing side lug 20 after the body 10 is bent out of the fixing side lug 20 is ensured.

Referring to fig. 1 to 3 and fig. 8 and 9, in an embodiment of the present invention, in order to ensure the installation stability of the side plate 100 and the cross beam 320, a plurality of fixing side lugs 20 are formed on the body 10, and the fixing side lugs 20 are spaced apart along the length direction of the body 10, so that a plurality of fixing points can be provided with the cross beam 320 by providing the fixing side lugs 20, and the installation stability of the side plate 100 and the cross beam 320 can be ensured.

Specifically, in the present embodiment, the distance L between every two adjacent fixed side ears 20 is between 80-100mm, so that the distance between the fixed side ears 20 is within a proper range, and the problem of poor fixation caused by uneven force distribution between the fixed side ears 20 when the distance between the fixed side ears 20 is too far is avoided; the problem that when the distance between the fixed side ears 20 is too close, more fixed points need to be arranged, so that the assembly is not facilitated is solved, and meanwhile, the problem of material waste is also solved.

Referring to fig. 2 to 5 and 7 to 9, in an embodiment of the present invention, in order to facilitate the installation of the side plate 100 and the end plate 220, the body 10 is provided with the folded edges 12 at both sides along the length direction, and the folded edges 12 are used for being connected with the end plate 220, so that the end plate 220 is installed, for example, the end plate 220 is attached and welded to facilitate the formation of the frame body of the whole battery module 200 by providing the folded edges 12 at both ends of the body 10 in the length direction.

In summary, in the battery module 200, the fixing side tab 20 is formed by bending the side plate 100, and the fixing side tab 20 and the body 10 are integrally formed, so that the fixing side tab 20 is simple in forming process and convenient to form, and the fixing side tab 20 is provided with the upper lip 21 and the lower lip 22 to ensure the connection strength of the fixing side tab 20; after the upper lip 21 and the lower lip 22 are molded relative to the body 10, the body 10 forms an upper sub through hole 111 and a lower sub through hole 112 at corresponding positions, and the battery can be cooled through the upper sub through hole 111 and the lower sub through hole 112, so that the use safety of the battery module 200 is ensured. In addition, the fixed side lug 20 in the embodiment is formed by bending the side plate 100 itself, so as to avoid the problem that the flanging and the fixed side lug 20 interfere with each other when the flanging of the fixed side lug 20 and the end of the body 10 is formed by an extrusion process.

Referring to fig. 10 and 11, in a second embodiment of the present invention, a battery pack 300 is further provided, which includes a box 310, a beam 320 and the battery module 200.

Wherein the fixed side lug 20 of the side plate 100 is connected with the box body 310. Specifically, the case 310 is provided therein with a cross member 320, and the fixed side lug 20 of the battery module 200 is coupled to the cross member 320 while being lapped on the cross member 320.

Therefore, the fixed side lug 20 is integrally formed on the side plate 100 of the battery module 200, and the fixed side lug 20 is lapped on the cross beam 320 to be connected with the cross beam 320, so as to ensure the installation stability of the whole battery pack 300.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims (19)

1. A battery module, comprising:

an end plate;

the side plate is connected with the end plate and forms an accommodating space with the end plate in an enclosing mode, the side plate comprises a body and a fixed side lug which is integrally formed with the body, the fixed side lug is formed by bending part of the body towards one side far away from the battery, and the fixed side lug is used for being connected with a battery box body;

and the single batteries are accommodated in the accommodating space.

2. The battery module according to claim 1, wherein the fixing side tab comprises an upper lip and a lower lip attached to each other.

3. The battery module according to claim 2, wherein the upper lip and the lower lip are coupled by a snap-fit.

4. The battery module as set forth in claim 3, wherein the lower lip is integrally formed with a tab toward the upper lip, and the tab is adapted to be engaged with the surface of the upper lip.

5. The battery module as set forth in claim 4, wherein the width of the tab in the lengthwise direction of the body is smaller than the width of the lower lip in the lengthwise direction of the body.

6. The battery module according to claim 2, wherein the upper lip is formed by bending part of the body downwards and is provided with a first vertical part and a first horizontal attaching part; the lower lip is formed by horizontally bending part of the body towards one side far away from the single battery, and the first horizontal attaching part is attached to the lower lip.

7. The battery module according to claim 2, wherein the upper lip is formed by bending part of the body downwards and comprises a second vertical part and a third horizontal attaching part; the lower lip is formed by bending the body upwards and comprises a third vertical part and a fourth horizontal attaching part, and the third horizontal attaching part is attached to the fourth horizontal attaching part.

8. The battery module according to claim 1, wherein the body is formed with a through-hole at a bent position.

9. The battery module as recited in claim 8, wherein the through-holes include an upper sub-through-hole and a lower sub-through-hole that are spaced apart from each other, the fixing lugs include an upper lip and a lower lip that are attached to each other, the upper lip is disposed on the body on a side close to the upper sub-through-hole, and the lower lip is disposed on the body on a side close to the lower sub-through-hole.

10. The battery module according to claim 9, wherein the height of the body is H, and the spacing between the upper sub-through holes and the lower sub-through holes is H1, wherein 8%H ≦ H1 ≦ 12%H.

11. The battery module as recited in claim 10, wherein the upper sub through hole has a height H2, the lower sub through hole comprises a first portion and a second portion from top to bottom, the lower lip is disposed adjacent to the first portion, the first portion has a height H3, and H1+ H2+ H3 is less than or equal to 0.7H.

12. The battery module according to claim 10, wherein the distance between the lower surface of the lower lip and the bottom of the body is H4, and 0.4H ≦ H4 ≦ 0.68H.

13. The battery module according to claim 9, wherein the upper lip and the lower lip have a width of L1 in the length direction of the body, the upper sub through hole and the lower sub through hole have a width of L2 in the length direction of the body, and the upper lip and the lower lip have a thickness of D, wherein L1= L2-1.5D.

14. The battery module according to claim 1, wherein the fixing side lug is formed with a mounting hole for coupling with the battery case by a fastener.

15. The battery module according to claim 1, wherein the body is provided with folded edges at both sides in the length direction, and the folded edges are used for connecting with end plates.

16. The battery module as set forth in claim 1, wherein the body is integrally formed with a plurality of the fixing lugs, and the fixing lugs are spaced apart from each other along the length direction of the body.

17. The battery module according to claim 16, wherein the spacing L between every two adjacent fixing side ears is between 80-100 mm.

18. The battery module according to claim 1, wherein the fixing side lug is formed using a stamping process.

19. A battery pack, comprising:

a box body;

the battery module of any of claims 1-18, wherein the fixed side lugs on the side plates are coupled to the housing.

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