CN214505677U

CN214505677U - Combined end plate, battery cell module and battery pack

Info

Publication number: CN214505677U
Application number: CN202120525257.4U
Authority: CN
Inventors: 吴浩民
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-10-26
Anticipated expiration: 2031-03-12

Abstract

The utility model relates to a battery technology field specifically discloses a combination end plate, electric core module and battery package. The composite end plate comprises an outer end plate, an inner end plate and a reinforcing beam. The outer end plate is provided with a mounting hole, and the mounting hole is used for mounting a functional component of the battery cell module. The inner end plate and the outer end plate are arranged oppositely. The two ends of the stiffening beam are respectively connected with the outer end plate and the inner end plate, so that the outer end plate and the inner end plate are connected into a whole through the stiffening beam. The outer end plate and the inner end plate are connected into a whole through the stiffening beam, the structural strength of the combined end plate is improved, the cell group is stably and fixedly limited, and therefore the structural strength of the cell module is improved. Simultaneously, can install the functional unit of electric core module on the mounting hole of outer terminal plate, realize the multi-functional use of combination end plate for the structure of electric core module is compacter, is favorable to improving the inside space utilization of battery package.

Description

Combined end plate, battery cell module and battery pack

Technical Field

The utility model belongs to the technical field of the battery, especially, relate to a combination end plate, electric core module and battery package.

Background

The battery module in the current battery package adopts single aluminum alloy end plate usually, and two end plates are installed respectively in the both ends of electric core group, play spacing fixed action. When the battery cell module is in the use, the end plate can also resist the expansion deformation of battery cell.

Along with the higher and higher requirement on the energy storage of the battery pack, the size of the electric core group is gradually increased. At present, the battery pack is generally assembled and produced in a large module mode. Traditional end plate is difficult to carry out effective fixed to the electricity core group of great size, leads to the structural strength of electricity core module lower, and stability is relatively poor.

In addition, the effect of traditional end plate is comparatively single, can not install the partial functional unit of electric core module, like high-pressure connector, explosion-proof valve etc. is unfavorable for improving the inside space utilization of battery package.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a combination end plate to improve the structural strength of electric core module, provide mounting platform for the functional unit of electric core module simultaneously.

To achieve the purpose, the technical proposal adopted by the utility model is that:

a composite endplate, comprising:

the outer end plate is provided with a mounting hole, and the mounting hole is used for mounting a functional component of the battery cell module;

an inner end plate disposed opposite the outer end plate;

and two ends of the stiffening beam are respectively connected with the outer end plate and the inner end plate, so that the outer end plate and the inner end plate are connected into a whole through the stiffening beam.

Furthermore, the number of the reinforcing beams is two, and the two reinforcing beams, the outer end plate and the inner end plate are sequentially connected to form a rectangular frame body.

Further, the height of the inner end plate is smaller than or equal to that of the outer end plate, and the height of the reinforcing beam is smaller than that of the inner end plate.

Further, the inner end plate is provided with a through hole, and the through hole is configured to allow at least part of the functional assembly to pass through the through hole and be mounted on the mounting hole.

Further, the outer end plate, the reinforcing beam and the inner end plate are all aluminum section plates.

Further, the longitudinal section of the aluminum section bar plate is in a harmonica tube structure.

Further, the outer end plate and the reinforcing beam are fixedly connected through welding, and the reinforcing beam and the inner end plate are fixedly connected through welding.

Another object of the utility model is to provide an electricity core module to improve the structural strength of electricity core module, provide mounting platform for the functional unit of electricity core module simultaneously.

the utility model provides an electricity core module, includes electric core group and foretell combination end plate, the both sides of electric core group are provided with respectively combination end plate.

Further, the battery core module further comprises a lower shell, wherein the lower shell is a U-shaped shell, and the two combined end plates are respectively connected with the open ends of the two sides of the lower shell in a welding manner so as to enclose a module frame for accommodating the battery core group.

Another object of the utility model is to provide a battery pack to improve the structural strength of electric core module, provide mounting platform for the functional unit of electric core module simultaneously.

a battery pack comprises the battery cell module.

The utility model has the advantages that:

the utility model provides a pair of combination end plate, electric core module and battery package, outer end plate passes through the stiffening beam with interior end plate and is connected as an organic wholely, has improved the structural strength of combination end plate, is convenient for carry out spacing fixed steadily to electric core group to improve the structural strength of electric core module.

Simultaneously, can install the functional unit of electric core module on the mounting hole of outer terminal plate, realize the multi-functional use of combination end plate for the structure of electric core module is compacter, is favorable to improving the inside space utilization of battery package.

Drawings

Fig. 1 is a schematic structural diagram of a lower shell and a combined end plate according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a combined end plate according to an embodiment of the present invention.

The component names and designations in the drawings are as follows:

10. a lower housing; 1. an outer end plate; 11. mounting holes; 2. an inner end plate; 3. and reinforcing the beam.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

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, detachably 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The embodiment discloses a battery pack, and this battery pack includes electric core module, and electric core module includes electric core group, and the both sides of electric core group are provided with the end plate respectively.

Because the energy storage of electricity core module is higher and higher, lead to the size of electricity core group also to increase thereupon. Traditional end plate is not only the function singleness, and structural strength is low moreover, is difficult to carry out effective fixed to the great electric core group of size.

In order to solve the above problem, as shown in fig. 1 and 2, the present embodiment also discloses a combined end plate, which includes an outer end plate 1, an inner end plate 2 and a reinforcing beam 3. The inner end plate 2 is arranged opposite to the outer end plate 1. The two ends of the reinforcing beam 3 are respectively connected with the outer end plate 1 and the inner end plate 2, so that the outer end plate 1 and the inner end plate 2 are connected into a whole through the reinforcing beam 3 to form a combined end plate.

For traditional end plate, the combination end plate structural strength of this embodiment is higher, can carry out spacing fixed steadily to electric core group to the structural strength of electric core module has been improved.

Mounting hole 11 has been seted up to outer end plate 1 of this embodiment, and mounting hole 11 is used for installing the functional unit of electric core module. Outer end plate 1 provides mounting platform for functional component, has realized the multi-functional use of combination end plate for the structure compacter of electric core module is favorable to improving the inside space utilization of battery package.

It should be noted that the functional components refer to a high-voltage connector, an explosion-proof valve, and the like of the cell module. The present embodiment will be described by taking a high-voltage connector as an example.

As shown in fig. 1 and 2, mounting holes 11 in the outer end plate 1 penetrate through both sides of the outer end plate 1 in the thickness direction. The high voltage connector is installed in the lateral wall of outer terminal plate 1, and the transmission cable of electricity core module passes through mounting hole 11 to be connected with the high voltage connector electricity to link to each other electricity core module and external circuit.

Specifically, the mounting hole 11 of this embodiment is a circular hole, four fixing holes are opened in the circumferential direction of the mounting hole 11, and the fastening bolt is in threaded connection with the fixing holes to fixedly mount the high-voltage connector in the mounting hole 11. It will be appreciated that the number, size and distribution of the mounting holes 11 can be adapted according to the mounting requirements of the functional assembly.

The outer end plate 1, the stiffening beam 3 and the inner end plate 2 of the embodiment are aluminum section plates, so that the combined end plate has higher structural strength, and the stability of the battery cell module is improved. Of course, the outer end plate 1, the reinforcing beam 3 and the inner end plate 2 can also be structural members made of other metal materials, and only the combined end plate needs to have enough structural strength so as to effectively limit and fix the electric core pack.

As shown in fig. 2, the longitudinal section of the aluminum section bar plate is in a harmonica tube structure, so that the weight of the combined end plate is reduced, and the energy density of the cell module is improved.

In other alternative embodiments, lightening holes with other structures can be formed in the aluminum section plates so as to realize lightening of the combined end plate.

The number of the stiffening beams 3 of this embodiment is two, and two stiffening beams 3, outer end plate 1 and inner end plate 2 link to each other in proper order and form the rectangle framework for the intensity of combination end plate is higher, and the structure is more stable.

Simultaneously, the rectangle framework can hold structural components such as connecting wire, the connecting plate of functional unit, has improved the utilization ratio in the inside space of electric core module, is favorable to improving the energy density of battery package. Of course, the number of the reinforcing beams 3 may be one, three, or four or more.

Specifically, the outer end plate 1 and the reinforcing beam 3, and the reinforcing beam 3 and the inner end plate 2 are fixedly connected by welding. The reinforcing beam 3 is positioned between the outer end plate 1 and the inner end plate 2, and the outer surfaces of the outer end plate 1 and the inner end plate 2 on the same side in the length direction are flush with the outer side surface of the corresponding reinforcing beam 3, so that the structural strength of the combined end plate is improved.

In alternative embodiments, the outer end plate 1 and the reinforcing beam 3, and the reinforcing beam 3 and the inner end plate 2 may be fixedly connected by bolts, bonding, riveting, or the like.

As shown in fig. 1, the battery cell module further includes a lower casing 10, and the lower casing 10 is a U-shaped casing. Two combination end plates respectively with the open end welded connection in casing 10 both sides down to enclose and establish into the module frame that holds electric core group, make electric core module have good structural strength and sealing performance.

The stiffening beam 3 of this embodiment is less than the height of outer end plate 1 and is less than the height of inner end plate 2, has reduced the weight of combination end plate, is favorable to improving the energy density of electric core module.

The height of the inner end plate 2 of the present embodiment is equal to or less than the height of the outer end plate 1, and the inner end plate 2 is provided with a through hole (not shown in the figure) which is communicated with the inside of the rectangular frame of the combined end plate, so that at least part of the functional components pass through the through hole and are mounted on the mounting hole 11. The size and number of the through holes are not particularly limited.

In other alternative embodiments, the height of the inner end plate 2 is smaller than the height of the outer end plate 1, facilitating the passage of structural members such as connecting wires, connecting plates, etc. of functional components over the inner end plate 2 into the rectangular frame of the composite end plate. Meanwhile, the weight of the combined end plate can be reduced, and the lightweight of the combined end plate is realized.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A composite end plate, comprising:

the battery cell module comprises an outer end plate (1), wherein the outer end plate (1) is provided with a mounting hole (11), and the mounting hole (11) is used for mounting a functional component of the battery cell module;

the inner end plate (2), the inner end plate (2) and the outer end plate (1) are arranged oppositely;

and two ends of the reinforcing beam (3) are respectively connected with the outer end plate (1) and the inner end plate (2), so that the outer end plate (1) and the inner end plate (2) are connected into a whole through the reinforcing beam (3).

2. The composite end plate according to claim 1, wherein the number of the reinforcing beams (3) is two, and the two reinforcing beams (3), the outer end plate (1) and the inner end plate (2) are sequentially connected to form a rectangular frame.

3. A composite end plate according to claim 1, characterised in that the height of the inner end plate (2) is less than or equal to the height of the outer end plate (1), and the height of the reinforcement beam (3) is less than the height of the inner end plate (2).

4. A composite end plate according to claim 1 or 3, characterised in that the inner end plate (2) is provided with a through hole, which is configured to pass at least part of the functional component through and to be mounted on the mounting hole (11).

5. The composite end plate according to claim 1, wherein the outer end plate (1), the reinforcement beam (3) and the inner end plate (2) are all aluminium profile plates.

6. The composite end plate of claim 5, wherein the aluminum profile plate has a longitudinal cross-section of a harmonica tubular structure.

7. The composite end plate according to claim 1, wherein the outer end plate (1) and the reinforcing beam (3), and the reinforcing beam (3) and the inner end plate (2) are fixedly connected by welding.

8. A battery cell module, which is characterized by comprising a battery cell group and the combined end plate of any one of claims 1 to 7, wherein the combined end plate is respectively arranged on two sides of the battery cell group.

9. The battery cell module of claim 8, further comprising a lower casing (10), wherein the lower casing (10) is a U-shaped shell, and the two combined end plates are welded to the open ends of the two sides of the lower casing (10) respectively, so as to enclose a module frame configured to accommodate the battery cell pack.

10. A battery pack comprising the cell module of claim 9.