CN215816196U - Battery module end plate, battery module and battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery module end plate, a battery module and a battery pack. The battery module end plate is used for setting up relatively with the big surface of battery, and the battery module end plate includes: the battery comprises a body, a battery cover and a battery cover, wherein the body comprises two opposite large surfaces, and one large surface is used for being arranged opposite to the large surface of the battery; and at least one of the two large faces is provided with a protrusion, and the protrusion extends along the length direction of the large face for resisting the expansion of the battery. Because the big face of body sets up with the big surperficial relatively of battery, and the battery bears great bulging force in the use on the big surface, consequently can make the body bear great bulging force, and the intensity of battery module end plate can be strengthened to bellied setting to this has improved the ability that battery module end plate resisted the battery inflation.

Description

Battery module end plate, battery module and battery pack

Technical Field

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

Background

The battery module in the related art includes a plurality of batteries and end plates for fixing the plurality of batteries, and most of the existing end plates have a hollow structure, and in order to reduce weight, the thickness of the end plates is relatively small, and the end plates are difficult to resist large volume expansion generated by the batteries.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery module end plate, a battery module and a battery pack, which are used for improving the service performance of the battery module end plate.

According to a first aspect of the present invention, there is provided a battery module end plate for being disposed opposite to a large surface of a battery, the battery module end plate comprising:

the battery comprises a body, a battery cover and a battery cover, wherein the body comprises two opposite large surfaces, and one large surface is used for being arranged opposite to the large surface of the battery;

and at least one of the two large faces is provided with a protrusion, and the protrusion extends along the length direction of the large face for resisting the expansion of the battery.

The battery module end plate comprises a body and the bulges, wherein the bulges are arranged on the body, the large surface of the body is opposite to the large surface of the battery, and the large surface of the battery bears larger expansion force in the use process, so that the body bears larger expansion force, and the bulges can enhance the strength of the battery module end plate, so that the capacity of the battery module end plate for resisting the expansion of the battery is improved.

According to a second aspect of the present invention, a battery module is provided, which comprises the battery module end plate.

The battery module end plate of the battery module comprises a body and the bulge, wherein the bulge is arranged on the body, the large surface of the body is opposite to the large surface of the battery, and the large surface of the battery bears larger expansion force in the use process, so that the body bears larger expansion force, and the bulge can enhance the strength of the battery module end plate, so that the capacity of the battery module end plate for resisting the expansion of the battery is improved.

According to a third aspect of the present invention, there is provided a battery pack including the above battery module.

The battery pack comprises the battery module, the battery module end plate of the battery module comprises a body and the bulge, the bulge is arranged on the body, the large surface of the body is arranged opposite to the large surface of the battery, and the large surface of the battery bears large expansion force in the use process, so that the body bears large expansion force, and the bulge can enhance the strength of the battery module end plate, so that the capacity of the battery module end plate for resisting the expansion of the battery is improved.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

fig. 1 is a schematic structural view illustrating an end plate of a battery module according to an exemplary embodiment;

fig. 2 is a partially exploded view illustrating a perspective view of a battery module according to an exemplary embodiment;

fig. 3 is a partially exploded view illustrating another perspective of a battery module according to an exemplary embodiment;

fig. 4 is a partial structural view illustrating a battery pack according to an exemplary embodiment.

The reference numerals are explained below:

1. a battery; 2. a box body; 3. a large surface; 10. a body; 11. large surface; 12. a cavity; 13. facets; 20. a protrusion; 21. a through hole; 22. a fixing hole; 23. a fastener; 24. reinforcing ribs; 30. side plates.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery module end plate, referring to fig. 1 to 4, the battery module end plate being configured to be disposed opposite to a large surface 3 of a battery 1, the battery module end plate including: a body 10, the body 10 comprising two opposite large faces 11, one large face 11 being intended to be arranged opposite the large face 3 of the battery 1; and a protrusion 20, at least one of the two large faces 11 being provided with the protrusion 20, and the protrusion 20 extending in a length direction of the large face 11 for resisting expansion of the battery 1.

The battery module end plate comprises a body 10 and the protrusion 20, wherein the protrusion 20 is arranged on the body 10, the large surface 11 of the body 10 is arranged opposite to the large surface 3 of the battery 1, and the large surface 3 of the battery 1 bears large expansion force in the use process, so that the body 10 bears large expansion force, and the protrusion 20 can enhance the strength of the battery module end plate, so that the capacity of the battery module end plate for resisting the expansion of the battery is improved.

It should be noted that, the battery 1 will swell during use, and therefore will expand on each surface of the battery 1, and the large surface 3 of the battery 1 will bear a larger expansion force, and at this time, the expansion force will be transmitted to the battery module end plate because the large surface 11 of the body 10 is opposite to the large surface 3 of the battery 1. In the related art, in order to reduce the weight of the end plate, the overall thickness of the end plate is reduced, thereby affecting the load-bearing capacity of the end plate. In the embodiment, the large surface 11 of the body 10 is provided with the protrusion 20 extending along the length direction of the large surface 11, so that the bearing capacity of the battery module end plate can be effectively improved, and the capacity of the battery module end plate for resisting the expansion of the battery is improved.

It is noted that the protrusions 20 extend in the length direction of the large face 11, i.e., it can be understood that the dimension of the protrusions 20 in the length direction of the large face 11 is not smaller than the dimension of the protrusions 20 in the width direction of the large face 11, so that the protrusions 20 can increase the resistance of the battery module end plate to cell expansion. It should be noted that the longitudinal direction of the large surface 11 may be considered to be parallel to the extending direction of the side of the large surface 11 parallel to the horizontal ground surface, and the width direction of the large surface 11 may be considered to be parallel to the extending direction of the side of the large surface 11 perpendicular to the horizontal ground surface when the battery module is horizontally placed on the horizontal ground surface. In the present embodiment, the length dimension of the large face 11 is not necessarily larger than the width dimension of the large face 11.

The body 10 includes two opposite large faces 11 and four small faces 13 surrounding the two large faces 11, the small faces 13 having an area not larger than that of the large faces 11. In the present embodiment, as shown in fig. 1, the area of the large face 11 of the body 10 is larger than the area of the small face 13.

The battery 1 comprises two opposite large surfaces 3 and four small surfaces surrounding the two large surfaces 3, the area of the small surfaces being no greater than the area of the large surfaces 3. The large surfaces 3 of the respective cells 1 of the battery module are arranged opposite to each other.

Alternatively, one of the two large faces 11 of the body 10 is provided with a projection 20, as shown in fig. 2 and 3, and one large face 11 of the body 10 facing away from the large face of the battery 1 is provided with a projection 20. Optionally, the other large face 11 of the body 10 close to the large face of the battery 1 is provided with a protrusion 20. Optionally, the protrusions 20 may be disposed on both large faces 11 of the body 10, so as to further improve the resistance of the battery module end plate against the expansion of the battery.

In one embodiment, at least two protrusions 20 may be disposed on one large surface 11, and the at least two protrusions 20 are disposed along the width direction of the large surface 11. In this embodiment, a projection 20 is provided on one large face 11.

In one embodiment, at least a portion of the protrusion 20 is located in the middle of the large surface 11, i.e. the protrusion 20 is located away from the top end and the bottom end of the large surface 11, so that the reinforcing effect of the protrusion 20 on the body 10 can be improved, and the problem of local deformation of the body 10 can be avoided.

In one embodiment, the protrusions 20 are located on a center line of the large surface 11 parallel to the length direction of the body 10, so that the protrusions 20 are close to the center of gravity of the body 10, enhancing the strength effect of the end plate of the battery module, thereby improving the resistance of the end plate of the battery module against the expansion of the battery. The longitudinal direction of the body 10 is parallel to the longitudinal direction of the battery 1.

Alternatively, the protrusion 20 may extend from one end to the other end in the length direction of the large face 11, i.e., the length dimension of the protrusion 20 may be equal to the length dimension of the large face 11. Alternatively, both ends of the protrusion 20 are spaced apart from both ends of the large surface 11 in the length direction, as shown in fig. 1. Further, both ends of the protrusion 20 are equally spaced from both ends of the large surface 11 in the longitudinal direction, so that the protrusion 20 can be located at the center of the large surface 11.

In one embodiment, the protrusions 20 are strip-shaped structures, which not only facilitate molding, but also provide sufficient support to the body 10, thereby increasing the resistance of the cell module end plate to cell expansion. The protrusion 20 may have a substantially rectangular body structure. Accordingly, the body 10 may have a substantially rectangular body structure.

In one embodiment, the length of the protrusions 20 is not less than half the length of the large face 11, thereby ensuring that the protrusions 20 can increase the strength of the end plates of the battery module.

Optionally, the length of the protrusion 20 is not less than two-thirds of the length of the large face 11.

In one embodiment, the protrusions 20 are hollow, so that the weight of the protrusions 20 is reduced, and the weight of the battery module end plate is prevented from being too large.

In one embodiment, the protrusion 20 may be provided with a weight-reducing groove, and the groove may extend along the length direction of the protrusion 20, or the groove may extend along the width direction of the protrusion 20.

In one embodiment, as shown in fig. 1, the protrusion 20 is provided with a through hole 21, and an extending direction of the through hole 21 is parallel to a length direction of the large surface 11, that is, the through hole 21 extends along the length direction of the protrusion 20, so that the reinforcing effect of the protrusion 20 on the body 10 is not reduced too much on the premise of ensuring that the weight of the protrusion 20 is reduced to the maximum extent.

Optionally, the protrusion 20 is provided with a through hole 21, and an extending direction of the through hole 21 is perpendicular to the length direction of the large surface 11, that is, the through hole 21 extends along the width direction of the protrusion 20.

In one embodiment, at least two through holes 21 are provided on the protrusion 20. In some embodiments, the protrusion 20 is provided with a through hole 21, which can reduce the processing difficulty and increase the forming efficiency, as shown in fig. 1.

It should be noted that the through hole 21 may be a rectangular hole, a circular hole, or other structures, and is not limited herein.

In one embodiment, as shown in fig. 1 to 3, a cavity 12 is provided on the body 10, and the cavity 12 penetrates the body 10 along the length direction of the large surface 11. The cavity 12 can reduce the weight of the body 10, the extending direction of the cavity 12 is consistent with the extending direction of the through hole 21, the body 10 and the protrusion 20 can be conveniently molded, the cavity 12 penetrating through the body 10 along the length direction of the large surface 11 can better resist the expansion inside the battery, and the weight reduction effect is better. In some embodiments, it is not excluded that the cavity 12 penetrates the body 10 in the width direction of the large face 11.

In one embodiment, the number of the cavities 12 is multiple, and the multiple cavities 12 are arranged at intervals along the width direction of the body 10, so that the strength of the body 10 can be ensured on the premise of reducing the weight.

In one embodiment, the body 10 and the protrusions 20 are integrally formed, thereby reducing the number of processes and ensuring the molding quality and the strength of the end plates of the battery module.

The body 10 is provided with a cavity 12 penetrating the body 10 in the longitudinal direction of the large surface 11, and the protrusion 20 is provided with a through hole 21 extending in the longitudinal direction of the large surface 11. After the battery inflation, the inside inflation of resisting the battery that horizontal die cavity 12 can be better, and transversely extrude die cavity 12 subtract heavy effect better, compare in vertical die cavity simultaneously, along the battery to the expanded thickness increase of battery module end plate direction, the ability reinforcing of deformation is resisted to the battery module end plate, when the battery cell inflation, can provide better intensity and rigidity.

Simultaneously, the setting of arch 20 has weakened the deformation of battery module end plate simultaneously, protruding 20 and the integrative extrusion moulding of body 10, protruding 20 inside through-hole 21 of 20 is the same with the die cavity 12 direction of body 10, consequently can integrative extrusion moulding, protruding 20 is owing to run through on length direction, can play the effect of strengthening, guarantee that battery module end plate better resists battery expansion deformation, guarantee that the frame of battery module is complete, reduce the deflection of battery module end plate, and intensity is better, avoid its fracture inefficacy. The frame of the battery module may include battery module end plates and side plates 30.

An embodiment of the present invention also provides a battery module, as shown in fig. 2 and 3, including the above-described battery module end plate.

The battery module end plate of the battery module comprises a body 10 and the bulge 20, wherein the bulge 20 is arranged on the body 10, the large surface 11 of the body 10 is arranged opposite to the large surface 3 of the battery 1, and the large surface 3 of the battery 1 bears large expansion force in the use process, so that the body 10 bears large expansion force, and the bulge 20 can enhance the strength of the battery module end plate, so that the capacity of the battery module end plate for resisting the expansion of the battery is improved.

Alternatively, the battery module includes a plurality of batteries, and the plurality of batteries are sandwiched between two opposite battery module end plates, and both of the two battery module end plates may be the above-described battery module end plates, and of course, one of the two battery module end plates may be an end plate in the related art. Correspondingly, the battery module can further comprise side plates 30, the side plates 30 are connected with the end plates of the battery module, so that effective clamping of the plurality of batteries is realized, and correspondingly, the side plates 30 are also oppositely arranged. The curb plate 30 can adopt the welding mode of borduring, and the tip cladding end plate of curb plate 30 promptly to this realizes the welding, and the bottom of battery module end plate can with battery bottom parallel and level, increased the area of contact of battery with the battery module end plate, increased end plate and curb plate welding length, guaranteed the reliability of battery module design.

The battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged. The battery core is arranged in the battery shell

An embodiment of the utility model also provides a battery pack, which comprises the battery module.

The battery pack comprises the battery module, the battery module end plate of the battery module comprises a body 10 and a protrusion 20, the protrusion 20 is arranged on the body 10, the large surface 11 of the body 10 is arranged opposite to the large surface 3 of the battery 1, and the large surface 3 of the battery 1 bears large expansion force in the use process, so that the body 10 bears large expansion force, and the strength of the battery module end plate can be enhanced through the protrusion 20, so that the capacity of the battery module end plate for resisting the expansion of the battery is improved.

In one embodiment, the battery pack further comprises a case 2, and the protrusion 20 is fixedly connected with the case 2, so that the battery module is connected with the case 2 through the battery module end plate, wherein the protrusion 20 is connected with the beam of the case 2 as shown in fig. 4.

The battery module sets up in box 2, can be provided with a plurality of battery modules in the box 2.

Further, as shown in fig. 1 and 4, the protrusion 20 is provided with a plurality of fixing holes 22, an extending direction of the fixing holes 22 is perpendicular to an extending direction of the through holes 21, and the fastening member 23 is connected to the case 2 after passing through the fixing holes 22. The fixing holes 22 may be bolt holes, and the fasteners 23 may be bolts.

Optionally, as shown in fig. 1, a reinforcing rib 24 is arranged inside the protrusion 20 opposite to the fixing hole 22, and the reinforcing rib 24 ensures that the protrusion 20 is not pressed to deform when the fastener 23 is locked, provides effective supporting force, and improves the fixing strength of the protrusion 20 and the box body 2.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (12)

1. A battery module end plate for arranging opposite a large surface (3) of a battery (1), characterized in that the battery module end plate comprises:

-a body (10), said body (10) comprising two opposite large faces (11), one of said large faces (11) being intended to be arranged opposite a large face (3) of said battery (1);

a protrusion (20), wherein at least one of the two large faces (11) is provided with the protrusion (20), and the protrusion (20) extends along the length direction of the large face (11) for resisting the expansion of the battery (1).

2. The battery module end plate according to claim 1, wherein at least part of the protrusion (20) is located in the middle of the large face (11).

3. The battery module end plate according to claim 2, wherein the protrusion (20) is located on a center line of the large face (11) parallel to the length direction of the body (10).

4. The battery module end plate according to any one of claims 1 to 3, wherein the protrusions (20) are of a strip-like structure.

5. The battery module end plate according to claim 4, wherein the length of the protrusion (20) is not less than half the length of the large face (11).

6. The battery module end plate according to any one of claims 1 to 3, wherein the protrusions (20) are hollow structures.

7. The battery module end plate according to claim 6, wherein the protrusions (20) are provided with through holes (21), and the through holes (21) extend in a direction parallel to the length direction of the large face (11).

8. The battery module end plate according to claim 7, wherein the body (10) is provided with a cavity (12), and the cavity (12) penetrates through the body (10) along the length direction of the large surface (11).

9. The battery module end plate of claim 8, wherein the body (10) and the protrusion (20) are integrally formed.

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

11. A battery pack comprising the battery module according to claim 10.

12. The battery pack according to claim 11, further comprising a case (2), wherein the protrusion (20) is fixedly connected with the case (2).

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