CN215989088U

CN215989088U - Battery module

Info

Publication number: CN215989088U
Application number: CN202122547737.3U
Authority: CN
Inventors: 吴懋川; 赵金坤; 杜鸿浩; 马旭强; 李团伟; 汤建成; 方智
Original assignee: Jiangsu Tianhui Lithium Battery Co ltd
Current assignee: Jiangsu Tianhui Lithium Battery Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-03-08
Anticipated expiration: 2031-10-21

Abstract

The utility model provides a battery module, which relates to the technical field of batteries and comprises two end plates, a plurality of battery cores and a steel belt; a plurality of cells are arranged between the two end plates; the steel belt is sleeved outside the two end plates and used for enabling the two end plates to clamp the plurality of battery cells; at least one of the end plates is provided with an elastic piece, the elastic piece is arranged between the end plate and the steel belt, and the elastic piece is in a compression state. The elastic piece is arranged between the steel belt and the end plate of the battery module, the elastic piece is in a compression state, so that the whole battery module is in a binding state, and the elastic piece has a certain compression amount, so that when the thickness of a specific cell has a larger error, the size of the steel belt has a larger error, the compression amount of the elastic piece can be adjusted, the thickness slight difference of the cell is eliminated to achieve the binding effect, and the phenomenon that the steel belt is loosened due to the extreme of the tolerance of the sizes of the cell and the steel belt is avoided.

Description

Battery module

Technical Field

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

Background

The mode that uses always at present is with its size according to the preparation welding of specified size, reaches the dimensional requirement, presses the battery module again to be less than the steel band inner frame size through the extrusion form and overlaps in the module, then will loosen pressure, through the bounce-back tensioning steel band of electric core, reaches the tight module of tie, and its drawback is that the unanimous requirement of thickness to the electric core is higher, and the unanimous requirement height of size to the steel band.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery module to solve the technical problem that the requirements on the thickness of a battery cell and the size of a steel belt are high when a plurality of battery cells are tightly bound by the steel belt.

The utility model provides a battery module, which comprises two end plates, a plurality of battery cores and a steel belt, wherein the two end plates are arranged on the two sides of the battery module; a plurality of cells are arranged between the two end plates; the steel belt is sleeved outside the two end plates and used for enabling the two end plates to clamp the plurality of battery cells;

at least one of the end plates is provided with an elastic piece, the elastic piece is arranged between the end plate and the steel belt, and the elastic piece is in a compression state.

In an optional embodiment, an elastic member is arranged between each end plate and the steel belt, and the elastic direction of the elastic member is the same as the stacking direction of the plurality of battery cells.

In an alternative embodiment, two elastic members are provided between each of the end plates and the steel strip.

In an alternative embodiment, the resilient member is a spring.

In an optional embodiment, a protrusion is disposed on the end plate, and a end of the elastic member is sleeved on the protrusion.

In an alternative embodiment, an annular groove is provided at an end of the steel band facing the elastic member, and an end of the elastic member is located in the annular groove.

In an optional embodiment, two protrusions are disposed on the end plate, and the two protrusions are disposed along two ends of the end plate in the width direction.

In an alternative embodiment, the end plate is provided with mounting grooves at both ends thereof in the width direction thereof, and the steel strip is positioned in the mounting grooves.

In an optional embodiment, the battery module comprises two steel belts, and the two steel belts are sleeved outside the two end plates.

In an optional embodiment, the battery further includes an upper cover plate and a lower bottom plate, the lower bottom plate is wrapped at the lower ends of the plurality of battery cells, and the upper cover plate is disposed at the upper ends of the plurality of battery cells.

The elastic piece is arranged between the steel belt and the end plate of the battery module, the elastic piece is in a compression state, so that the whole battery module is in a binding state, and the elastic piece has a certain compression amount, so that when the thickness of a specific cell has a larger error, the size of the steel belt has a larger error, the compression amount of the elastic piece can be adjusted, the thickness slight difference of the cell is eliminated to achieve the binding effect, and the phenomenon that the steel belt is loosened due to the extreme of the tolerance of the sizes of the cell and the steel belt is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

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

fig. 2 is a partially enlarged view of a of the battery module shown in fig. 1;

fig. 3 is a schematic structural view of an end plate of the battery module shown in fig. 1;

fig. 4 is a partially enlarged view B of an end plate of the battery module shown in fig. 3.

Icon: 100-electric core; 200-an end plate; 300-a steel belt; 301-a metal strip; 302-an insulating tape; 400-an elastic member; 500-bump.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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.

Examples

Referring to fig. 1 to 4, the present invention provides a battery module including two end plates 200, a plurality of battery cells 100, and a steel strip 300; a plurality of battery cells 100 are disposed between the two end plates 200; the steel belt 300 is sleeved outside the two end plates 200 and used for enabling the two end plates 200 to clamp a plurality of the battery cells 100;

at least one of the end plates 200 is provided with an elastic member 400, the elastic member 400 is arranged between the end plate 200 and the steel strip 300, and the elastic member 400 is in a compressed state.

In some embodiments, the battery module includes a plurality of battery cells 100, after the plurality of battery cells 100 are stacked, in order to ensure that the plurality of battery cells 100 can ensure a stacked state, end plates 200 are disposed at two ends of the stacked direction of the plurality of battery cells 100, a steel belt 300 is sleeved on the end plates 200, and in order to clamp the battery cells 100 by the two end plates 200, the steel belt 300 is sleeved on the two end plates 200 after being pressed to a size smaller than an inner frame of the steel belt 300 in a general extrusion manner; and (3) removing the external force, and tensioning the steel belt 300 by the resilience of the plurality of battery cells 100 to achieve the purpose of tightly binding the battery module.

After the elastic member 400 is arranged between the steel plate and the end plate 200, when the size of the steel belt 300 is too large, the elastic member 400 can make up the problem that the steel belt 300 is too large, so that the steel belt 300 can tightly bind the battery module; when the size of the battery cell 100 has a large error, the elastic member 400 is extended and retracted to compensate, so that the thickness deviation of the battery cell 100 is eliminated to achieve a binding effect, and the extreme tolerance of the sizes of the battery cell 100 and the steel belt 300 is avoided, so that the steel belt 300 is loosened.

Referring to fig. 2, in an alternative embodiment, an elastic member 400 is disposed between each of the end plates 200 and the steel strip 300, and an elastic direction of the elastic member 400 is the same as a stacking direction of the plurality of battery cells 100.

In an alternative embodiment, two elastic members 400 are disposed between each of the end plates 200 and the steel strip 300.

In an alternative embodiment, the elastic member 400 is a spring.

The elastic member 400 is generally a spring, and the compressed direction of the spring is the same as the stacking direction of the plurality of battery cells 100; the elastic force of the spring can be used for tightly overlapping the plurality of battery cells 100; the elastic member 400 may serve as a buffer when the plurality of battery cells 100 are expanded during use.

In order to allow the elastic members 400 to give the battery cells 100 sufficient elastic force, two elastic members 400 are provided between the end plate 200 and the steel belt 300; and an elastic member 400 is provided between each end plate 200 and the steel band 300; and then, no matter which cell 100 is expanded, the expansion force of the cell 100 can be better transmitted to the nearest end plate 200, so that the elastic member 400 can play a role of buffering more quickly.

Referring to fig. 3 and 4, in an alternative embodiment, a protrusion 500 is disposed on the end plate 200, and an end of the elastic member 400 is sleeved on the protrusion 500.

In an alternative embodiment, an annular groove is provided at an end of the steel band 300 facing the elastic member 400, and an end of the elastic member 400 is located in the annular groove.

In order to enable the elastic member 400 to be fixed between the end plate 200 and the steel belt 300 in a higher manner, the end plate 200 may be provided with a protrusion 500, one end of the steel belt 300 is provided with an annular groove, and one end of the elastic member 400 is sleeved on the protrusion 500, so that the elastic force of the elastic member 400 can effectively act on the steel belt 300; an annular groove is formed in the steel band 300 so that one end of the elastic member 400 can be effectively coupled to the steel band 300, and the elastic member 400 is positioned between the steel band 300 and the end plate 200, thereby allowing the elastic force of the elastic member 400 to be more effectively applied to the steel band 300 and the end plate 200.

The elastic member 400 may further include an expansion member, the elastic member 400 is disposed on the expansion member, and both ends of the expansion member are connected to the steel band 300 and the end plate 200, respectively; when the elastic member 400 is compressed by the expansion member, the elastic force of the elastic member 400 is more applied to the steel band 300 and the end plate 200.

In an alternative embodiment, two protrusions 500 are disposed on the end plate 200, and the two protrusions 500 are disposed along two ends of the end plate 200 in the width direction.

In an alternative embodiment, mounting grooves are provided at both ends of the end plate 200 in the width direction of the end plate 200, and the steel strip 300 is positioned in the mounting grooves.

In an alternative embodiment, the battery module includes two steel belts 300, and both of the two steel belts 300 are sleeved outside the two end plates 200.

In order to maintain the plurality of battery cells 100 in a stacked state, two steel strips 300 are provided on the battery module; when two steel belts 300 are arranged on the battery module, four protrusions 500 are arranged on each end plate 200, two protrusions 500 on each end plate 200 correspond to one steel belt 300, in order to avoid the up-and-down movement of the steel belt 300 in the height direction of the end plate 200, a mounting groove is arranged on the end plate 200, after the steel belt 300 is sleeved on the end plate 200, the steel belt 300 is just positioned in the mounting groove, and further the steel belt 300 cannot move in the height direction of the end plate 200; thus, the elastic member 400 between the steel band 300 and the end plate 200 is not subjected to a force in the longitudinal direction of the end plate 200, so that the elastic member 400 is not easily displaced and the direction of the elastic force of the elastic member 400 is not affected.

In an optional embodiment, the battery further includes an upper cover plate and a lower base plate, the lower base plate is wrapped at the lower ends of the plurality of battery cells 100, and the upper cover plate is disposed at the upper ends of the plurality of battery cells 100.

The general battery module further comprises an upper cover plate, a lower bottom plate and the like, and a partition plate is generally arranged between the adjacent battery cores 100; an aluminum bar or the like for connecting the plurality of battery cells 100 in series or in parallel is also provided on the battery cell 100.

Steel strip 300 generally comprises metal strip 301 and insulating strip 302; the metal tape 301 is generally disposed to correspond to the end plate 200, and the insulating tape 302 is disposed to correspond to a portion of the battery cell 100.

The elastic member 400 is arranged between the steel belt 300 and the end plate 200 of the battery module provided by the utility model, the elastic member 400 is in a compression state, and further the whole battery module is in a binding state, and because the elastic member 400 has a certain compression amount, when a larger error occurs in the thickness of an individual battery core 100 and a larger error occurs in the size of the steel belt 300, the slight difference in the thickness of the battery core 100 can be eliminated through the adjustment of the compression amount of the elastic member 400 to achieve the binding effect, and the phenomenon that the steel belt 300 is loosened due to the extreme tolerance of the sizes of the battery core 100 and the steel belt 300 is avoided.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery module is characterized by comprising two end plates (200), a plurality of battery cores (100) and a steel belt (300); a plurality of cells (100) are arranged between the two end plates (200); the steel belt (300) is sleeved outside the two end plates (200) and used for enabling the two end plates (200) to clamp the plurality of battery cells (100);

an elastic piece (400) is arranged on at least one end plate (200), the elastic piece (400) is arranged between the end plate (200) and the steel belt (300), and the elastic piece (400) is in a compressed state.

2. The battery module according to claim 1, wherein an elastic member (400) is disposed between each of the end plates (200) and the steel belt (300), and an elastic direction of the elastic member (400) is the same as a stacking direction of the plurality of battery cells (100).

3. The battery module according to claim 2, wherein two elastic members (400) are disposed between each of the end plates (200) and the steel band (300).

4. The battery module according to claim 1, wherein the elastic member (400) is a spring.

5. The battery module according to claim 4, wherein a protrusion (500) is provided on the end plate (200), and an end of the elastic member (400) is fitted over the protrusion (500).

6. The battery module according to claim 4, wherein an end of the steel belt (300) facing the elastic member (400) is provided with an annular groove, and an end of the elastic member (400) is located in the annular groove.

7. The battery module according to claim 5, wherein two protrusions (500) are provided on the end plate (200), and the two protrusions (500) are provided along both ends in the width direction of the end plate (200).

8. The battery module according to claim 1, wherein mounting grooves are provided at both ends of the end plate (200) in the width direction of the end plate (200), and the steel strip (300) is positioned in the mounting grooves.

9. The battery module according to claim 1, wherein the battery module comprises two steel strips (300), and the two steel strips (300) are sleeved outside the two end plates (200).

10. The battery module according to claim 1, further comprising an upper cover plate and a lower base plate, wherein the lower base plate is wrapped around the lower ends of the plurality of battery cells (100), and the upper cover plate is disposed at the upper ends of the plurality of battery cells (100).