CN210136924U

CN210136924U - Battery module

Info

Publication number: CN210136924U
Application number: CN201921318332.9U
Authority: CN
Inventors: 游书兵; 姚己华
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-03-10
Anticipated expiration: 2029-08-14

Abstract

The utility model provides a battery module, it includes a plurality of batteries and ribbon. At least a portion of the plurality of cells are arranged side-by-side along a second direction. The ribbon includes main part and energy-absorbing portion, and energy-absorbing portion connects in the main part and extends along first direction, and the main part encircles a plurality of batteries set up, and energy-absorbing portion is located between two adjacent batteries on the second direction. The energy absorbing parts are arranged in pairs, and the two energy absorbing parts in the pairs are arranged at intervals in the first direction and form energy absorbing gaps with the corresponding batteries. In the battery module of this application, because the energy-absorbing clearance can directly absorb the expansion deformation that corresponds the battery and produce, not only avoided the inefficacy risk of ribbon from this, still greatly improved the life of battery. In addition, based on the setting of the energy-absorbing portion of ribbon for need not additionally to set up other buffer structure between two adjacent batteries on the second direction, thereby reduced the part in groups of battery module, improved efficiency in groups.

Description

Battery module

Technical Field

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

Background

A battery module generally includes a plurality of batteries and a band for grouping the plurality of batteries together. At present, along with the continuous promotion of battery module capacity, in the use of battery module, the bulging force that the battery produced is also constantly increasing, and this just leads to the ribbon to take place the displacement of warping easily, and then causes the ribbon to become invalid easily to the effect of cramping of battery (like the ribbon fracture etc.).

SUMMERY OF THE UTILITY MODEL

In view of the problem that exists among the background, the utility model aims to provide a battery module, the ribbon of battery module can directly absorb the expansion deformation that the battery produced, has not only avoided the inefficacy risk of ribbon, has still greatly improved the life of battery.

In order to achieve the above object, the present invention provides a battery module, which includes a plurality of batteries and a band. At least a portion of the plurality of cells are arranged side-by-side along a second direction. The ribbon includes main part and energy-absorbing portion, and energy-absorbing portion connects in the main part and extends along first direction, and the main part encircles a plurality of batteries set up, and energy-absorbing portion is located between two adjacent batteries on the second direction. The energy absorbing parts are arranged in pairs, and the two energy absorbing parts in the pairs are arranged at intervals in the first direction and form energy absorbing gaps with the corresponding batteries.

The energy absorbing portion includes a first extension, a second extension, and a connecting segment. The first extension section and the second extension section are connected to the main body part and extend along the first direction, and the first extension section and the second extension section are arranged at intervals in the second direction. The connecting section is located between and connected to the first extension section and the second extension section in the second direction.

The connecting sections are multiple, the connecting sections are arranged at intervals in the third direction, and at least part of each connecting section obliquely extends from the first extending section to the second extending section.

The at least part of each connecting section extends obliquely at an acute angle of not more than 45 ° to the third direction.

Each connecting section is formed into a wave-shaped structure.

All portions of each connecting section extend obliquely upward from the first extending section toward the second extending section. Alternatively, all portions of the respective connecting sections extend obliquely downward from the first extending section toward the second extending section.

Each connecting section is formed into a plate-like structure. Alternatively, each connecting section is formed in an arc-shaped structure.

The cable tie further comprises a connecting portion, the connecting portion is connected with the main body portion and the energy absorbing portion, and at least part of the connecting portion is formed into an arc-shaped structure.

The connecting part is integrally formed into a wavy structure.

The battery module further comprises end plates, and the end plates are arranged at two ends of the batteries along the second direction. The body portion of the tie surrounds the plurality of batteries and the end plate.

The utility model has the advantages as follows:

in the battery module of this application, because the energy-absorbing portion of ribbon sets up between two adjacent batteries on the second direction to make energy-absorbing portion and the battery that corresponds be formed with the energy-absorbing clearance, and the energy-absorbing clearance can directly absorb the bulging deformation that corresponds the battery production, not only avoided the failure risk of ribbon from this, still greatly improved the life of battery. In addition, based on the setting of the energy-absorbing portion of ribbon for need not additionally to set up other buffer structure between two adjacent batteries on the second direction, thereby reduced the part in groups of battery module, improved efficiency in groups.

Drawings

Fig. 1 is a perspective view of a battery module according to the present invention.

Fig. 2 is a perspective view of the cable tie of fig. 1.

Fig. 3 is an enlarged view of a circled portion in fig. 2.

Fig. 4 is a front view of fig. 3.

Fig. 5 is a top view of fig. 3.

Fig. 6 is a modification of fig. 3.

Wherein the reference numerals are as follows:

1 cell 22C connection segment

2 ribbon 23 connection

21 end plate of main body part 3

22 energy-absorbing part X first direction

22A first extension Y in a second direction

22B second extension Z third direction

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means more than two (including two); 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 application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, it should be understood that the terms "upper" and "lower" used in the description of the embodiments of the present application are used in a descriptive sense only and not for purposes of limitation. The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Referring to fig. 1, the battery module of the present application may include a plurality of batteries 1, a band 2, and an end plate 3.

At least part of the plurality of batteries 1 are arranged side by side in the second direction Y and are tightened by a tie 2. Specifically, the plurality of cells 1 may all be arranged side by side in the second direction Y (i.e., the plurality of cells 1 may be arranged in a row); or a part of the plurality of cells 1 may be arranged side by side in the second direction Y and a part in the first direction X (i.e., the plurality of cells 1 may be arranged in a plurality of rows).

The end plates 3 may be two in number, and the two end plates 3 are disposed at both ends of the plurality of batteries 1 along the second direction Y and are located inside the bands 2. Here, since the end plate 3 is in direct contact with the band 2, damage to the battery 1 due to stress concentration at the position of the band 2 is avoided. Further, to facilitate the positioning and mounting of the band 2, the end plate 3 may be provided with corresponding stop structures (e.g. grooves or snaps) to define the mounting position of the band 2.

The bands 2 are provided around the plurality of batteries 1 and the end plates 3 to tighten the plurality of batteries 1 and the end plates 3, thereby suppressing the expansion deformation of the plurality of batteries 1 during the use of the battery module. Wherein the band 2 can be one or more in number. When the bands 2 are plural in number, the plural bands 2 are provided at intervals in the third direction Z.

The material of the ribbon 2 can be steel, steel alloy or high-strength plastic.

Referring to fig. 2-6, the twist tie 2 may include a main body portion 21 and an energy absorbing portion 22. The band 2 may also comprise a connecting portion 23, depending on the actual situation.

Referring to fig. 2, the body portion 21 of the tie 2 is disposed around the plurality of batteries 1 and the end plate 3 to tighten the plurality of batteries 1 and the end plate 3.

The energy absorbing portion 22 is connected to the main body portion 21 and divides the main body portion 21 into a plurality of stages, and the energy absorbing portion 22 extends in the first direction X and is positioned between two cells 1 adjacent in the second direction Y. In other words, two batteries 1 adjacent in the second direction Y are spaced apart by the corresponding energy absorbing portions 22.

The energy absorbing parts 22 are arranged in pairs, and the two energy absorbing parts 22 in the pair are arranged at intervals in the first direction X and symmetrically distributed, and the two energy absorbing parts 22 in the pair and the corresponding battery 1 form an energy absorbing gap to directly absorb the expansion deformation generated by the corresponding battery 1.

In the battery module of this application, because energy-absorbing portion 22 of ribbon 2 sets up between two adjacent batteries 1 on second direction Y to make energy-absorbing portion 22 and the battery 1 that corresponds be formed with the energy-absorbing clearance, and the energy-absorbing clearance can directly absorb the expansion deformation that corresponds battery 1 and produce, not only avoided ribbon 2's inefficacy risk from this, still greatly improved battery 1's life. In addition, due to the arrangement of the energy absorbing part 22 of the ribbon 2, other buffer structures (such as buffer pads) do not need to be additionally arranged between two adjacent batteries 1 in the second direction Y, so that the grouping components of the battery modules are reduced, and the grouping efficiency is improved.

Referring to fig. 2, energy absorbing portions 22 of band 2 may be arranged in a plurality of pairs, with the pairs of energy absorbing portions 22 being spaced apart in second direction Y. Since each pair of energy absorbing parts 22 and the corresponding battery 1 form an energy absorbing gap, the plurality of energy absorbing gaps can absorb the expansion deformation of the plurality of batteries 1 to the maximum extent.

Referring to fig. 3-6, energy absorbing portion 22 of tie 2 can include a first extension 22A, a second extension 22B, and a connecting segment 22C.

First and

second extensions

22A and 22B of energy absorbing portion 22 are connected to main body portion 21 and extend in first direction X, and first and

second extensions

22A and 22B are provided at an interval in second direction Y. The extension length of the first extension section 22A and the second extension section 22B in the first direction X and the interval size of the first extension section 22A and the second extension section 22B in the second direction Y directly influence the size of the energy absorption gap, and the size of the energy absorption gap directly relates to the absorption capacity of the tie 2 on the expansion deformation of the battery 1, so the extension length of the first extension section 22A and the second extension section 22B in the first direction X and the interval size of the first extension section 22A and the second extension section 22B in the second direction Y can be reasonably set according to the requirement of the battery module on the expansion force.

The connecting section 22C of the energy-absorbing portion 22 is located between the first extension 22A and the second extension 22B in the second direction Y and is connected to the first extension 22A and the second extension 22B. The provision of the connecting section 22C here increases the strength of the energy-absorbing portion 22 and thus the overall strength of the band 2, whereby the risk of failure of the band 2 is further reduced.

The connecting segment 22C may be plural, the plural connecting segments 22C are spaced apart in the third direction Z, and at least a portion of each connecting segment 22C extends obliquely from the first extending segment 22A toward the second extending segment 22B (i.e., the at least a portion of the connecting segment 22C extends obliquely in both the second direction Y and the third direction Z).

Because the at least part of each connecting section 22C extending obliquely is more easily bent and deformed under the action of the expansion force of the battery 1, the connecting sections 22C and the energy absorption gaps can absorb the expansion deformation of the battery 2 together in time, thereby further reducing the failure risk of the cable tie 2 and prolonging the service life of the battery 1. In addition, the band 2 can also absorb assembly tolerances between the plurality of batteries 1 based on the deformable property of the connection segments 22C, thereby maximally securing the assembly dimensional accuracy of the entire battery module.

Since the angle formed by the at least partially inclined direction of each connecting section 22C and the third direction Z determines the amount of expansion force transmitted from the first extending section 22A and the second extending section 22B to the connecting section 22C, and if the connecting section 22C is subjected to an excessive expansion force, the connecting section 22C is broken, and therefore, preferably, the acute angle formed by the at least partially inclined direction of each connecting section 22C and the third direction Z is not more than 45 °.

The specific structure of each connecting section 22C of energy absorbing portion 22 will be described in detail below with reference to specific embodiments.

In a first embodiment, referring to FIG. 6, each connecting section 22C of energy absorber 22 may be formed as a wave-like structure (also referred to as a corrugated structure). In other words, each connecting section 22C extends alternately in a direction obliquely upward from the first extending section 22A toward the second extending section 22B and in a direction obliquely downward from the first extending section 22A toward the second extending section 22B.

Each of the connection segments 22C of this structure is formed with a projection, and each of the projections is formed in an arc-shaped structure. Based on the shape structure of each protrusion, each connecting section 22C has a sufficient bending deformation space, so that the energy absorbing part 22 can absorb the expansion deformation generated by the battery 1 in time, thereby greatly improving the service life of the battery 1.

In the second embodiment, all portions of each connecting section 22C extend obliquely upward from the first extending section 22A toward the second extending section 22B; alternatively, all portions of each connecting section 22C extend obliquely downward from the first extending section 22A toward the second extending section 22B. In the second embodiment, each connecting section 22C may be formed in a plate-like structure, or each connecting section 22C may be formed in an arc-shaped structure (as shown in fig. 4).

The energy absorbing portion 22 of the band 2 can be connected directly to the body portion 21. Of course, the energy absorbing portion 22 may be connected to the main body portion 21 by the connecting portion 23, referring to fig. 2 to 6.

Specifically, at least a portion of the connection portion 23 may be formed in an arc structure. During the use of the battery module, the at least part of the connecting part 23 can also absorb the expansion deformation generated by the plurality of batteries 1, so that the absorption capacity of the energy absorption part 22 for absorbing the expansion deformation of the batteries 1 is effectively compensated, and the service life of the batteries 1 is further prolonged.

Preferably, the connecting portion 23 may be formed in a wave-like structure as a whole.

Claims

1. A battery module is characterized by comprising a plurality of batteries (1) and a binding belt (2);

at least part of said plurality of cells (1) are arranged side by side along a second direction (Y);

the cable tie (2) comprises a main body portion (21) and an energy absorption portion (22), wherein the energy absorption portion (22) is connected to the main body portion (21) and extends along a first direction (X), the main body portion (21) is arranged around the plurality of batteries (1), and the energy absorption portion (22) is located between two adjacent batteries (1) in a second direction (Y);

the energy absorbing parts (22) are arranged in pairs, and the two energy absorbing parts (22) in the pairs are arranged at intervals in the first direction (X) and form energy absorbing gaps with the corresponding batteries (1).

2. The battery module according to claim 1,

the energy absorbing part (22) comprises a first extension section (22A), a second extension section (22B) and a connecting section (22C);

a first extension section (22A) and a second extension section (22B) are connected to the main body section (21) and extend along the first direction (X), and the first extension section (22A) and the second extension section (22B) are arranged at intervals in the second direction (Y);

the connecting section (22C) is located between the first extension section (22A) and the second extension section (22B) in the second direction (Y) and is connected to the first extension section (22A) and the second extension section (22B).

3. The battery module according to claim 2, wherein the connecting section (22C) is plural, the plural connecting sections (22C) are arranged at intervals in the third direction (Z), and at least a part of each connecting section (22C) extends obliquely from the first extending section (22A) toward the second extending section (22B).

4. A battery module according to claim 3, characterized in that the direction in which the at least part of each connecting section (22C) extends obliquely forms an acute angle of not more than 45 ° with the third direction (Z).

5. The battery module according to claim 3, wherein each connecting section (22C) is formed in a wave-like structure.

6. The battery module according to claim 3,

all parts of each connecting section (22C) extend obliquely upward from the first extension section (22A) toward the second extension section (22B); or

All portions of each connecting section (22C) extend obliquely downward from the first extension section (22A) toward the second extension section (22B).

7. The battery module according to claim 6,

each connecting section (22C) is formed into a plate-shaped structure; or

Each connecting section (22C) is formed in an arc-shaped configuration.

8. The battery module according to claim 1, wherein the tie (2) further comprises a connecting portion (23), the connecting portion (23) connects the main body portion (21) and the energy absorbing portion (22), and at least a portion of the connecting portion (23) is formed in an arc-shaped structure.

9. The battery module according to claim 8, wherein the connecting portion (23) is integrally formed in a wave-like structure.

10. The battery module according to claim 1,

the battery module further comprises end plates (3), and the end plates (3) are arranged at two ends of the plurality of batteries (1) along a second direction (Y);

a body portion (21) of the tie (2) surrounds the plurality of batteries (1) and the end plate (3).