CN216529114U

CN216529114U - Battery end plate and battery module

Info

Publication number: CN216529114U
Application number: CN202122826168.6U
Authority: CN
Inventors: 唐泳聪; 徐博豪; 陈淑娴; 汤杰
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-05-13
Anticipated expiration: 2031-11-18

Abstract

The utility model relates to the technical field of new energy batteries, and particularly discloses a battery end plate and a battery module. The battery end plate includes buffer board, reinforcing plate and locating part, and the both ends of reinforcing plate are connected and are formed the cushion chamber with the both ends of buffer board, and the locating part sets up between buffer board and reinforcing plate. The buffer plate is in contact with the single batteries, and when the single batteries swell, the buffer plate can be extruded to deform towards one side of the reinforcing plate, so that the buffer effect is achieved, the force transmitted to the battery side plate is reduced, the use safety of the battery module is improved, the battery end plate cannot deform, the overall size of the battery module is not affected, and adjacent parts can be prevented from being extruded; the arrangement of the reinforcing plate improves the structural strength of the battery end plate and avoids the rupture of the battery end plate; the setting of locating part can restrict the deformation degree of buffer board, avoids warping too big and extrudeing the reinforcing plate to the size of locating part can be adjusted according to the in-service use demand, and the use flexibility is strong.

Description

Battery end plate and battery module

Technical Field

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

Background

A plurality of battery cells form a battery assembly side by side, two battery end plates and two battery side plates which are fixedly connected together enclose a frame for accommodating and fixing the battery assembly, and the battery assembly is placed in the frame to form a battery module. The battery module is at the during operation circulation charge-discharge, along with electrochemical reaction, the monomer battery can take place to swell, receives the space restriction extrusion this moment, will produce the bulging force. The pressure that current battery end plate can not fine absorption battery cell inflation produced, especially when battery module reaches the end of life, its bulging force can change greatly, can make the battery end plate bear bigger power, arouses that the battery end plate takes place to warp or damage to extrude adjacent part, more serious still probably conducts the bulging force to the battery curb plate, leads to the curb plate fracture, thereby causes the power consumption safety problem.

Therefore, it is desirable to provide a battery end plate to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery end plate and a battery module, which enable the battery end plate to have the anti-expansion performance and improve the use safety of the battery module.

In order to achieve the purpose, the utility model adopts the following technical scheme:

provided is a battery end plate including:

buffer plate for contacting the unit cell

The two ends of the reinforcing plate are connected with the two ends of the buffer plate, and a buffer cavity is formed between the reinforcing plate and the buffer plate;

the limiting piece is arranged in the buffer cavity and used for limiting the deformation of the buffer plate.

As a preferable technical solution of the above battery end plate, the limiting member is disposed on the reinforcing plate and spaced from the buffer plate.

As a preferable aspect of the above battery end plate, the stopper includes a rib extending in a direction perpendicular to the buffer plate.

As a preferable aspect of the above battery end plate, the reinforcing plate includes:

a first laminate;

the second laminate is arranged at intervals with the first laminate, and a plurality of reinforcing ribs are arranged at intervals between the second laminate and the first laminate.

As a preferred technical scheme of the battery end plate, arc-shaped grooves which are inwards concavely arranged are formed in the two sides of each reinforcing rib.

As a preferable technical solution of the above battery end plate, both side walls of the buffer cavity are both provided with the buffer plate inclined toward the end of the reinforcing plate.

As a preferable technical solution of the above battery end plate, corners of the buffer cavity are all in smooth transition.

As a preferable technical solution of the above battery end plate, hollow cavities penetrating through the reinforcing plate are formed at both ends of the reinforcing plate along the height direction of the reinforcing plate.

As a preferable technical solution of the above battery end plate, the buffer plate, the reinforcing plate, and the limiting member are of an integrally formed structure.

Still provide a battery module, including a plurality of battery cells, two battery curb plates and two as above any battery end plate, two battery curb plates and two battery end plate enclose into the frame, battery cell installs in the frame.

The utility model has the beneficial effects that:

the battery end plate provided by the utility model has a two-layer structure, the buffer plate is in contact with the single batteries, and the buffer plate can be extruded to deform towards one side of the reinforcing plate when the single batteries swell, so that the buffering effect is achieved, the force transmitted to the battery side plate is reduced, the use safety of a battery module is improved, the battery end plate cannot deform, the overall size of the battery module is not influenced, and adjacent parts can be prevented from being extruded; the arrangement of the reinforcing plate improves the structural strength of the battery end plate and avoids the rupture of the battery end plate; the setting of locating part can restrict the deformation degree of buffer board, avoids warping too big and extrudeing the reinforcing plate to the size of locating part can be adjusted according to the in-service use demand, and the use flexibility is strong.

The battery end plate of the battery module provided by the utility model can absorb the pressure generated by the expansion of the battery, reduces the force transmitted to the battery side plate, and improves the use safety of the battery module.

Drawings

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

fig. 2 is a top view of an assembly structure of a battery module according to an embodiment of the present invention;

fig. 3 is a top view of a battery end plate provided by an embodiment of the present invention.

In the figure:

1. battery end plates, 2, battery side plates, 3 and single batteries;

11. a buffer plate; 12. a reinforcing plate; 13. a buffer chamber; 14. a limiting member;

121. a first laminate; 122. a second laminate; 123. reinforcing ribs; 124. a hollow-out cavity.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

To among the prior art, the pressure that the battery end plate can not be fine absorption battery cell inflation produced, arouses that the battery end plate takes place to warp or damage to extrude adjacent part, more serious still probably conduct the bulging force to the battery curb plate, lead to the curb plate fracture, thereby cause the problem with the electrical safety, this embodiment provides a battery module in order to solve technical problem.

As shown in fig. 1 and 2, in the present embodiment, the battery module includes a plurality of single batteries 3, two battery side plates 2, and two battery end plates 1, wherein the two battery side plates 2 and the two battery end plates 1 enclose a frame, and the single batteries 3 are mounted in the frame. The battery side plate 2 and the battery end plate 1 protect the single batteries 3. The specific installation structure of the single battery 3 in the frame and the connection structure between the multiple single batteries 3 are the prior art, and are not described in detail herein.

The both ends of battery curb plate 2 all are equipped with to the bent plate of same one side bending, and when battery end plate 1 and battery curb plate 2 concatenation were together, the medial surface of bent plate and the laminating of the lateral surface of battery end plate 1 to realize the concatenation of battery end plate 1 and battery curb plate 2, simple structure easily assembles.

As shown in fig. 3, the battery end plate 1 provided in this embodiment includes a buffer plate 11 and a reinforcing plate 12, two ends of the reinforcing plate 12 are connected to two ends of the buffer plate 11, a buffer cavity 13 is formed between the reinforcing plate 12 and the buffer plate 11, and the buffer plate 11 is in contact with the single battery 3. When the single battery 3 swells, the buffer plate 11 is extruded to deform towards one side of the reinforcing plate 12, the buffer cavity 13 plays a role in buffering, the force transmitted to the battery side plate 2 is reduced, the use safety of the battery module is improved, the battery end plate 1 cannot deform, the overall size of the battery module is not affected, and adjacent parts can be prevented from being extruded; the reinforcing plate 12 improves the structural strength of the battery end plate 1, and prevents the battery end plate 1 from cracking.

In this embodiment, both side walls of the buffer chamber 13 are disposed by inclining the buffer plate 11 toward the end of the reinforcing plate 12, that is, the cross section of the buffer chamber 13 is trapezoidal, so as to improve the deformation resistance of the buffer plate 11.

The equal rounding off in corner of cushion chamber 13 avoids the stress concentration in the corner of cushion chamber 13, and when buffer board 11 produced deformation, the difficult fracture that produces of buffer board 11 and reinforcing plate 12's junction.

The reinforcing plate 12 provided by the embodiment includes a first layer plate 121 and a second layer plate 122, the second layer plate 122 is spaced from the first layer plate 121, and a plurality of reinforcing ribs 123 are spaced between the second layer plate 122 and the first layer plate 121. The structure of the reinforcing plate 12 can not only improve the structural strength of the battery end plate 1, but also realize the lightweight design of the battery end plate 1. In addition, when the single battery 3 expands to generate pressure, the cavities formed between the adjacent reinforcing ribs 123 can also absorb certain pressure, so that the pressure is uniformly dispersed into each cavity, and the battery end plate 1 can further absorb the pressure generated by the expansion of the single battery 3.

Further, the both sides of strengthening rib 123 all are equipped with the arc wall that the indent was established to the cross-section that makes every cavity all is approximate oval shape, avoids the corner stress concentration of cavity, improves reinforcing plate 12's structural strength.

In this embodiment, the two ends of the reinforcing plate 12 are both provided with the hollow cavities 124 penetrating through the reinforcing plate 12 along the height direction of the reinforcing plate 12, and when the single battery 3 expands to generate pressure, the arrangement of the hollow cavities 124 enables the battery end plate 1 to further absorb the pressure generated by the expansion of the single battery 3, so as to improve the safety of the battery module in use. In addition, the provision of the hollow-out cavity 124 also enables the battery end plate 1 to be lightweight.

In this embodiment, the cross section of the hollow cavity 124 is a triangle, preferably a right triangle, and the hypotenuse of the right triangle is disposed toward the side where the reinforcing rib 123 is disposed, so as to adapt to the arrangement of the cavities on the reinforcing plate 12. The shape of the hollow cavity 124 may also be circular or elliptical, and the like, and is not limited specifically herein, and the shape of the hollow cavity 124 may be set according to the arrangement manner of the cavities on the reinforcing plate 12, so as to improve the performance of absorbing the pressure generated by the battery expansion and improve the structural strength of the reinforcing plate 12.

The buffer plate 11 and the reinforcing plate 12 are preferably integrally formed to improve the structural strength of the battery end plate 1 and facilitate the processing.

In this embodiment, a limiting member 14 is further disposed between the buffer plate 11 and the reinforcing plate 12, that is, the limiting member 14 is disposed in the buffer cavity 13. Preferably, the limiting member 14 is disposed on the reinforcing plate 12, and the limiting member 14 is connected to the reinforcing plate 12 and disposed at a distance from the buffer plate 11, that is, the limiting member 14 is kept at a certain distance from the buffer plate 11. The setting of locating part 14 can restrict the deformation degree of buffer board 11, avoids warping too big and extrudeing reinforcing plate 12 to the distance of locating part 14 and buffer board 11 interval can be adjusted according to the in-service use demand, and the flexibility of use is strong. In another embodiment, the limiting member 14 may also be disposed on the buffer plate 11 and spaced apart from the reinforcing plate 12, which is not limited herein.

In order to improve the performance of the stoppers 14 in restricting the deformation of the cushion plate 11, a plurality of stoppers 14 are provided at intervals along the longitudinal direction of the reinforcing plate 12. The position-limiting member 14 is preferably integrally formed with the reinforcing plate 12, and the position-limiting member 14 can be formed by an injection molding process, which is convenient for production and processing.

Optionally, the limiting member 14 includes a rib extending in a direction perpendicular to the buffer plate 11, and the extending length of the rib may be set according to the requirement of actual deformation of the buffer plate 11. The cross section of the rib is rectangular, and can also be semicircular or triangular. Of course, the limiting member 14 may have other structures, and is not limited herein.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery end plate, comprising:

a buffer plate (11) for contacting the battery cells (3);

the two ends of the reinforcing plate (12) are connected with the two ends of the buffer plate (11), and a buffer cavity (13) is formed between the reinforcing plate (12) and the buffer plate (11);

the limiting piece (14) is arranged in the buffer cavity (13), and the limiting piece (14) is used for limiting the deformation of the buffer plate (11).

2. The battery end plate according to claim 1, wherein the stopper (14) is provided on the reinforcing plate (12) at a distance from the buffer plate (11).

3. The battery end plate according to claim 2, wherein the retaining member (14) comprises a rib extending in a direction perpendicular to the buffer plate (11).

4. The battery end plate of claim 1, wherein the reinforcement plate (12) comprises:

a first laminate (121);

the second laminate (122) and the first laminate (121) are arranged at intervals, and a plurality of reinforcing ribs (123) are arranged between the second laminate (122) and the first laminate (121) at intervals.

5. The battery end plate according to claim 4, wherein the reinforcing ribs (123) are provided with arc-shaped grooves which are concave inwards on both sides.

6. The battery end plate according to claim 1, wherein both side walls of the buffer chamber (13) are provided obliquely from the buffer plate (11) toward the end of the reinforcing plate (12).

7. The battery end plate according to claim 1, characterized in that the corners of the buffer chamber (13) are rounded off.

8. The battery end plate according to claim 1, wherein both ends of the reinforcing plate (12) are provided with a hollow-out cavity (124) penetrating through the reinforcing plate (12) in the height direction of the reinforcing plate (12).

9. The battery end plate according to claim 1, wherein the buffer plate (11), the reinforcement plate (12) and the stopper (14) are of an integrally formed structure.

10. A battery module, characterized by comprising a plurality of single batteries (3), two battery side plates (2) and two battery end plates (1) according to any one of claims 1-9, wherein the two battery side plates (2) and the two battery end plates (1) enclose a frame, and the single batteries (3) are mounted in the frame.