CN211700397U

CN211700397U - Battery module frame and battery module

Info

Publication number: CN211700397U
Application number: CN202020736988.9U
Authority: CN
Inventors: 关俊山; 王进军; 郭其鑫; 曹勇
Original assignee: China Aviation Lithium Battery Co Ltd; China Aviation Lithium Battery Research Institute Co Ltd
Current assignee: Avic Innovation Technology Research Institute Jiangsu Co ltd; China Aviation Lithium Battery Co Ltd; CALB Technology Co Ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-10-16
Anticipated expiration: 2030-05-07

Abstract

Disclosed are a battery module frame and a battery module including the same. The battery module frame includes end plates, side plates, and separators; the end plates and the side plates are connected to form an outer frame; the baffle includes with the curb plate is located the plane parallel riser, and is roughly perpendicular to the riser, set up respectively the riser first direction both ends and with end plate vertically first diaphragm and second diaphragm, the baffle second direction both ends with the end plate is connected. The utility model discloses a battery module frame wherein the frame that end plate and curb plate formed carries out X and Y to spacingly respectively to the battery, the baffle is to carrying on spacingly and fixed to battery Z to can fix at six degrees of freedom, improved the fixed strength and the reliability of battery, avoided the short and not enough problem of reliability of fatigue life that the fixed battery of adhesive brought. Meanwhile, the number of parts can be reduced, thereby improving the energy density of the battery module.

Description

Battery module frame and battery module

Technical Field

The utility model belongs to the power field, concretely relates to battery module frame and battery module.

Background

In the prior art, the fixing strength and rigidity of the battery in the battery module are insufficient. Receive the vibration at battery module and influence, perhaps along with battery charge-discharge's continuous cyclic utilization, the bulging force of battery constantly changes, leads to unable effective fixation battery, can arouse battery tab or the fracture of leading electrical drainage, leads to the electrical connection to become invalid, and battery module can't export power, and in the time of serious, can produce the safety problem.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defect, the utility model provides a battery module frame and contain battery module of this frame.

One aspect of the present invention provides a battery module frame, which includes end plates, side plates, and partition plates; the end plates and the side plates are connected to form an outer frame; the baffle include with the curb plate is located the parallel riser in plane, and generally perpendicular to the riser, set up respectively the riser first direction both ends and with end plate vertically first diaphragm and second diaphragm, the baffle second direction both ends with the end plate is connected.

Another aspect of the present invention provides a battery module including the above battery module frame.

The utility model discloses a battery module frame wherein the frame that end plate and curb plate formed carries out X and Y respectively to spacingly to the battery, "the baffle is to carrying on spacingly and fixed to battery Z to can fix at six degrees of freedom, improved the fixed strength and the reliability of battery.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

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

Fig. 2 is an assembly view of a battery module according to an embodiment of the present invention.

Fig. 3 is a schematic view illustrating the assembly of the end plates and the separators of the battery module according to the embodiment of the present invention.

Fig. 4 is a front view of a battery module frame side plate according to an embodiment of the present invention.

Fig. 5 is a left side view of a battery module frame end plate according to an embodiment of the present invention

Fig. 6 is a plan view of a battery module according to an embodiment of the present invention.

Fig. 7 is a bottom view of a battery module according to an embodiment of the present invention.

Fig. 8 is a plan view of a battery module according to another embodiment of the present invention.

Wherein the reference numerals are as follows:

1-side plate; 10-first folding; 11-second folding; 12 — excess of insulating layer; 13 an insulating layer; 14-an aluminum plate; 2-end plate; 20-mounting holes; 21-a groove; 22-hoisting holes; 23-R corner edge; 24-bevel angle; 25-opening; 26-positioning holes; 27-a mould cavity; 3-a separator; 30-a first transverse plate; 31-a riser; 32-a second transverse plate; 33-a plug-in part; 34-an insulating layer; 4-cell

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers are exaggerated for clarity. The same reference numerals denote the same or similar structures in the drawings, and thus detailed descriptions thereof will be omitted.

The present invention will be described in detail with reference to the following embodiments.

The terms "inner", "outer", "medial" and "lateral" in this patent refer to the frame, i.e., toward the inside of the frame, as "inner", "medial" or "medial", and toward the outside of the frame, as "outer", "lateral" or "lateral".

An embodiment of the utility model provides a battery module frame and battery module including this frame. As shown in fig. 1, the battery module frame includes end plates 2, side plates 1, and separators 3. The end plate 2 comprises a first end plate and a second end plate arranged oppositely. The side plate 1 comprises a first side plate and a second side plate which are oppositely arranged, and is respectively connected with a first end plate and a second end plate to form an outer frame.

In this embodiment, the separator 3 is substantially "i" shaped. Optionally, the first transverse plate 30 and the second transverse plate 32 are substantially perpendicular to the vertical plate 31 at two ends of the vertical plate 31 in the first direction (X direction), and the angle formed by the

transverse plates

30,32 and the vertical plate 31 may range from 88 ° to 92 °. The vertical plate 31 may be connected to the first transverse plate 30 or the second transverse plate 32 at a midpoint of the first transverse plate 30 or the second transverse plate 32, or may be connected to the first transverse plate 30 or the second transverse plate 32 at a near end of the first transverse plate 30 or the second transverse plate 32. The lengths of the first transverse plate 30 and the second transverse plate 32 may be the same or different; the first horizontal plate 30 and the second horizontal plate 32 may be symmetrically disposed, asymmetrically disposed, and the like, which is not limited in the present application. Both ends of the vertical plate 31 of the partition 3 in the second direction (Z direction) are connected to both end plates 2. Referring to fig. 2, when the battery module is assembled, a plurality of batteries 4 are disposed in a space surrounded by the end plate 2, the side plate 1, and the separator 3 to form the battery module. As shown in fig. 1 and 2, the first direction is the X direction and the second direction is the Z direction. Battery 4 is injectd at first direction (X to) to first end plate and second end plate, and battery 4 is injectd to Y to first curb plate and second curb plate, and battery 4 is injectd at second direction (Z to) to first diaphragm 30 and second diaphragm 32 to the realization is fixed to the battery in three directions, has improved the fixed strength and the reliability of battery, has avoided the problem that the fatigue life that the fixed battery of adhesive brought is short and the reliability is not enough. And simultaneously, the utility model discloses an among the battery module frame, the first diaphragm 31 and the second diaphragm 32 of baffle 3 carry on spacingly to (module direction of height) in Z to the battery 4 of assembly in baffle 3 both sides, can reduce the use of current battery module middle bottom plate and apron, can be in order to reduce spare part quantity to promote the energy density of battery unit weight.

In an alternative embodiment, shown in fig. 3, the separator 3 may be formed from an "i" shaped extruded section of aluminum alloy, or may be formed in any other suitable manner. The partition 3 includes a first cross plate 30, a vertical plate 31, and a second cross plate 32. The surfaces of the two sides of the vertical plate 31, the inner sides of the first transverse plate 30 and the second transverse plate 32, which are in contact with the battery 4, are coated with insulating layers 34, and the insulating layers 31 extend out of the first transverse plate 30 and the second transverse plate 32, so that the electric creepage distance is increased, and the safety of the battery module is improved.

In alternative embodiments, the connection manner between the side plate 1, the partition plate 3 and the end plate 2 may be any suitable connection manner, such as welding, riveting, inserting or being an integral structure, and the application is not limited thereto. Wherein the welding may be laser welding, CMT (Cold Metal Transfer) welding, or the like. In an alternative embodiment, as shown in fig. 3, the inner side of the end plate 2 is provided with a groove 21, and the plug-in part 33 of the separator 3 fits into the groove 21 in the middle of the end plate 2 and is fixed to the end plate 2 by laser welding or CMT welding. Furthermore, a bevel 24 may be provided at the edge of the recess 21, the fitting spacer 3 serving a guiding function.

In an alternative embodiment, as shown in fig. 2, the side plate 1 may further be provided with a first folded edge 10 and a second folded edge 11 at two ends in the first direction (X direction), and the first folded edge 10 and the second folded edge 20 extend inward into the frame. The included angle between the first folding edge 10 and the side plate 1 is 88-90 degrees optionally, namely the first folding edge 10 faces upwards when the battery module is assembled to be used normally, and the first folding edge 10 and the side plate 1 form an acute angle to fix the battery 4. The included angle between the second folded edge 20 and the side plate 1 is preferably 90-92 degrees, that is, the second folded edge 20 is at the bottom when the battery module is assembled, and the second folded edge and the side plate form an obtuse angle for the convenience of assembling the battery 4. As shown in fig. 2 and 7, when the batteries 4 are assembled to form a module, the first folded edge 10 and the second folded edge 11 at the two ends of the side plate 1 limit the Z direction (the module height direction) of the batteries 4, so that the overall rigidity of the side plate 1 is increased, and the bottom flatness of the batteries 4 is ensured. As shown in fig. 4, the side plate 1 and the folded

edges

10 and 11 may be an integral structure, and may be formed by bending an aluminum plate 14 (or other plate materials) and an insulating layer 13 coated on the surface of the aluminum plate 14. Optionally, the insulating layer 13 extends to the outside of the

flaps

10, 11. That is, the insulating layer 13 is coated on the inner side surfaces of the side plate 1 and the

beads

10,11 contacting the battery 4, and the insulating layer 13 extends to the outside of the frame beyond the excess portion 12 of the insulating layer of the aluminum plate 14, increasing the electrical creepage distance and improving the safety of the battery module. Optionally, the joint between the second flange 20 of the outer surface of the frame and the side plate 1 is rounded to avoid damaging the battery module.

As shown in fig. 2 and 5, the end plate 2 is provided with 4 mounting holes 20 fixed to the battery pack case, and compared with the prior art, 2 mounting holes 20 are added in the middle of the end plate 2, so that the fixing strength of the whole battery module is improved. It will be understood by those skilled in the art that the number of the mounting holes 20 is not limited to 4, but may be more to increase the strength of the fixing. The end plate 2 may also be provided with lifting holes 22 for lifting the battery modules.

In an alternative embodiment, shown in fig. 1, 3 and 5, the inner facing edge of end plate 2 at Y is an R-corner edge 23, avoiding the edge of end plate 2 from crushing cells 4. Wherein, the R angle refers to a fillet or a circular arc angle. Alternatively, the R-angle is provided on the inner side surface of the upper end of the end plate 2. The end plate 2 may also be provided with openings 25 to accommodate the modular liquid cooling assembly. The opening 25 may be a recess in the bottom of the end plate 2 as shown in fig. 3, or may be an opening in any suitable location in the end plate 2 to accommodate the liquid cooling assembly. As shown in fig. 6, the end plate 2 is provided with a positioning hole 26, optionally an oblong hole, for facilitating recognition by an automatic production line vision photographing system to position the battery module. The end plate 2 can be an aluminum alloy extruded section, and the end plate 2 is provided with a cavity 27, so that the weight of the end plate 2 can be reduced.

As shown in fig. 8, the battery module may further include 3 rows of batteries, but is not limited to 3 rows, i.e., the number of separators in the battery module may be 1, 2, 3 or more. The number of the partition plates can be selected according to actual needs, for example, 4, 5, 6 or more can be selected when the energy requirement is large; if the energy demand is small, 1, 2 and 3 can be set. The above are merely examples, and the specific number of partitions is not limited. The number of the batteries in series and parallel can be adjusted according to actual requirements, and is not limited to the number of the batteries in the embodiment

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A battery module frame, characterized in that:

comprises an end plate, a side plate and a clapboard;

the end plates and the side plates are connected to form an outer frame;

the baffle include with the curb plate is located the parallel riser in plane, and generally perpendicular to the riser, set up respectively the riser first direction both ends and with end plate vertically first diaphragm and second diaphragm, the baffle second direction both ends with the end plate is connected.

2. The battery module frame of claim 1, wherein both sides of the risers of the partition are provided with insulating layers, the inner sides of the first and second transverse plates are provided with insulating layers, and the insulating layers of the inner sides of the first and second transverse plates extend to the first and second transverse plate outer sides, respectively.

3. The battery module frame according to claim 1, wherein a first folded edge and a second folded edge are respectively disposed at two ends of the side plate in the first direction, the first folded edge extends into the outer frame and forms an angle of 88-90 ° with the side plate, and the second folded edge extends into the outer frame and forms an angle of 90-92 ° with the side plate.

4. The battery module frame of claim 3, wherein inner sides of the side plates, the first and second flanges are provided with an insulating layer that extends outside of the first and second flanges.

5. The battery module frame of claim 1, wherein the inner side edge of the end plate is an R-corner edge.

6. The battery module frame according to claim 1, wherein the end plates are provided with grooves for connecting the separators, and wherein the groove edges are provided with bevels for guiding.

7. The battery module frame of claim 1, wherein the end plates are further provided with openings to accommodate liquid cooled components.

8. The battery module frame of claim 1, wherein the end plates are further provided with positioning holes.

9. The battery module frame of claim 1, wherein the end plates, the side plates, and the separator plates are connected by one or more of welding, riveting, plugging, or an integral structure.

10. A battery module comprising the battery module frame according to any one of claims 1 to 9.