CN220492018U

CN220492018U - Battery component

Info

Publication number: CN220492018U
Application number: CN202321706120.4U
Authority: CN
Inventors: 陈智锋; 兰祥金; 魏礼贵
Original assignee: Xiamen Kehua Digital Energy Tech Co Ltd
Current assignee: Xiamen Kehua Digital Energy Tech Co Ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2024-02-13
Anticipated expiration: 2033-06-30

Abstract

The utility model discloses a battery assembly, which comprises: a housing; and a plurality of battery modules which are suitable for being arranged and accommodated in the shell; the battery module includes: the battery cell group comprises a plurality of battery cells which are arranged along a first direction; the end plates are two in number and respectively attached to two ends of the battery cell group in the first direction; the fixing piece is connected with the two end plates so that the two end plates clamp and fix the battery cell group; and a plurality of spacers are inserted between each adjacent battery cells, and the thickness of each spacer in each battery module is suitable for keeping the length of the battery module where the spacer is positioned consistent with the lengths of other battery modules. The battery module in the battery assembly can ensure the consistency with the lengths of other battery modules under the condition of adopting different types of electric cores.

Description

Battery component

Technical Field

The utility model relates to the technical field of battery modules, in particular to a battery assembly.

Background

In the fields of photovoltaic energy storage, new energy electric automobiles and other fields, lithium ion batteries are being widely used because of the advantages of high energy density, long cycle life, high charging speed and the like. The lithium ion battery anode material comprises lithium iron phosphate, lithium cobaltate, ternary lithium and the like, wherein the lithium ion battery taking the ternary lithium as the battery anode material has high energy density and high grouping efficiency and is used in a large amount. In practical applications, a lithium ion battery is generally assembled from a plurality of battery cells to form a battery module, and then assembled from a plurality of battery modules to form a battery assembly for use.

Generally, in the same type of battery module, the types and brands of the adopted battery cells are the same, which can bring about better battery performance and dimensional consistency, however, in some cases, for example, battery cell purchasing is problematic, etc., different types of battery cells may be adopted between each battery module in one battery assembly, that is, there is a case that one battery module adopts an a type battery cell and the other battery module adopts a B type battery cell; or, the battery modules in one battery assembly all adopt the A type battery cells, and the battery modules in the other battery assembly all adopt the B type battery cells. However, for the battery assembly of the same specification, the length of the battery module which can be adapted is fixed, and when the battery modules adopt different types of electric cores, the difference in the sizes, particularly the thicknesses, of the electric cores of different types can cause the too large difference in the lengths between the battery modules adopting the electric cores of different types, so that the battery module cannot be well adapted to the housing of the battery assembly.

Disclosure of Invention

The utility model aims to overcome the defects or problems in the prior art and provide a battery assembly, wherein the length of a battery module in the battery assembly can be ensured to be consistent with that of other battery modules under the condition of adopting different types of electric cores.

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

a battery assembly, comprising: a housing; and a plurality of battery modules which are suitable for being arranged and accommodated in the shell; the battery module includes: the battery cell group comprises a plurality of battery cells which are arranged along a first direction; the end plates are two in number and respectively attached to two ends of the battery cell group in the first direction; the fixing piece is connected with the two end plates so that the two end plates clamp and fix the battery cell group; and a plurality of spacers; the spacer is inserted between each two adjacent battery cells, and the thickness of the spacer in each battery module is suitable for keeping the length of the battery module where the spacer is positioned consistent with the lengths of other battery modules.

Further, at least one battery module is provided with a battery cell, and the thickness dimension of the battery cell in the first direction is different from that of the battery cell in other battery modules.

Further, the spacer is a mica sheet or a composite sheet formed by overlapping the mica sheet and aerogel.

Further, the fixing piece is a fixing strap which tightly winds the two end plates to bind and fix the plurality of battery cells.

Further, the fixing piece is a metal strap.

Furthermore, a protective sleeve is attached to the surface of the fixing piece, and the protective sleeve is made of rubber or silica gel.

Further, the battery module also comprises two protection sheets, wherein the two protection sheets are respectively positioned between the end plates at the two ends of the battery module in the first direction and the adjacent battery cells.

Furthermore, the protection sheet is made of rubber or silica gel.

As can be seen from the above description of the present utility model, the present utility model has the following advantages over the prior art:

the battery assembly provided by the utility model comprises the shell and a plurality of battery modules arranged in the shell, when the battery modules adopt different types of battery cores, the length of the battery modules is greatly different, so that the length of each battery module needs to be adjusted, and the length of each battery module can be kept consistent so as to be convenient for being matched with the shell of the battery assembly; in the battery module in the battery assembly, the spacers are arranged between the battery cells, different battery modules can adopt the spacers with different thicknesses, the spacers play a role in adjusting the length of the battery cell group, and when the lengths of the battery cell groups of different battery modules are consistent, the battery cell groups are fixed by using the end plates and the fixing pieces; through setting up the spacer, can make the length of each battery module in the battery pack keep unanimous.

The spacer adopts mica sheets or composite sheets formed by overlapping the mica sheets and aerogel, so that the length of the battery module can be adjusted, and meanwhile, the effects of heat insulation, insulation and the like can be achieved.

The mounting is fixed bandage, tightens up fixed electric core and spacer behind two end plates through bypassing, can make things convenient for battery module's equipment, reduces assembly cost.

The mounting is the metal bandage, and structural strength is higher, can avoid causing the battery module to damage because of the mounting fracture.

The protective sleeve is attached to the surface of the fixing piece, so that the damage to the battery core and the leakage of the battery core caused by the scratch of the fixing piece and the side surface of the battery core are avoided, and the insulating function can be realized.

The protective sheet is arranged between the end plate and the adjacent battery cell, so that the damage to the battery cell and the leakage of liquid caused by scratch between the end plate and the surface of the battery cell can be avoided.

The protective sheet is made of rubber or silica gel, and can play a role in protection and insulation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the description of the embodiments below are briefly introduced, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a structural exploded view of a battery module in an embodiment of a battery pack according to the present utility model;

fig. 2 is a schematic structural view of a plurality of battery modules according to an embodiment of the present utility model.

The main reference numerals illustrate:

a cell group 10; a cell 11; an end plate 20; a fixing member 30; a spacer 40; a protective sheath 50; and a protective sheet 60.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is to be understood that the described embodiments are preferred embodiments of the utility model and should not be taken as excluding other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without creative efforts, are within the protection scope of the present utility model.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the utility model.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present utility model, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

The embodiment of the utility model provides a battery assembly, which mainly comprises a shell and a battery module, in the embodiment, the shell is not shown, a conventional battery assembly packaging shell can be adopted, and a positioning structure for mounting and fixing the battery module is arranged inside the shell.

Referring to fig. 1 and 2, the battery modules are adapted to be arranged and accommodated in the above-mentioned case, and in this embodiment, each battery module mainly includes a battery cell 11 set 10, an end plate 20, a fixing member 30, a spacer 40, a protection sleeve 50 and a protection sheet 60.

Generally, each of the battery cells 11 in the battery module 10 includes a plurality of battery cells 11 arranged along a first direction, where the first direction may be regarded as a length direction of the battery module. Different types of battery cells 11 produced by different manufacturers may differ in power specification and external dimensions.

In this embodiment, the same type of battery cells 11 are used in the same battery module, so as to ensure the stability of outputting and storing electric energy in the same battery module. However, for a plurality of battery modules in the same battery assembly, there are cases that different battery modules adopt different types of battery cells 11, and differences in thickness dimensions of the different types of battery cells 11 can cause that after a plurality of battery cells 11 are stacked and arranged, the dimension differences of the battery cell 11 set 10 in the first direction are too large, and then the dimension differences of the battery modules in the length direction are too large. For the housing of the battery assembly, the length dimensions of the battery modules adapted to the positioning structure for mounting the battery modules therein are the same, so that the length dimensions of each battery module need to be adjusted, and the length dimensions of each battery module are ensured to be consistent and adapted to the housing of the corresponding battery assembly.

It should be noted that the case of using battery modules having different cell types in the same battery module is exemplified in this embodiment, and in other embodiments, battery modules having the same type may be used in the same battery module, but battery modules having different types from the battery module may be used in other battery modules, and in this case, the length and the size of the battery modules still need to be adjusted because the specifications of the battery module case are the same.

Referring to fig. 1, a plurality of battery cells 11 are stacked in a first direction, which is a length direction of the battery module and is also a thickness direction of the battery cells 11.

Referring to fig. 1, the number of the end plates 20 is two, and the end plates 20 are respectively attached to two ends of the plurality of battery cells 11 in the first direction, and the end plates 20 may be made of metal plates.

The fixing member 30 connects the two end plates 20 so that the two end plates 20 clamp and fix the plurality of battery cells 11. Specifically, the fixing member 30 is a fixing strap, which is wound around the two end plates 20 in a tightening manner to bind the plurality of electric cells 11, and the fixing strap may be made of metal, such as a steel belt. The fixing piece 30 made of metal can have better structural strength, and avoid the fracture of the binding belt.

The number of the spacers 40 is plural, one spacer 40 is inserted between two adjacent cells 11 in one battery module, and the thickness of the spacer 40 in each battery module is suitable for keeping the length of the battery module where it is located consistent with the length of other battery modules.

Specifically, during assembly, the cells 11 and the spacers 40 may be sequentially stacked and arranged, the spacers 40 and the adjacent two cells 11 are fixed by bonding, the thickness of each spacer 40 is predetermined, the length of the combination formed by the cells 11 and the spacers 40 is determined by adjusting the thicknesses of the spacers 40, then the upper end plates 20 are placed at two ends, and the fixing members 30 are wound around the two end plates 20 and tensioned to enable the fixing members 30 to apply force to the cells 11 and the spacers 40 inwards in the first direction through the end plates 20, so that the cells 11 can be clamped and fixed by the end plates 20. The assembled battery module is referred to in the drawings.

The thickness of the spacer 40 between the cells 11 in the battery module can be adjusted by replacing the spacer 40 with a different thickness, or the thickness of the spacer 40 can be adjusted by grinding or the like. In this embodiment, the spacer 40 is a mica sheet, or a composite sheet formed by overlapping a mica sheet and aerogel, which can perform the functions of heat insulation and insulation at the same time, so as to improve the protection performance of the battery module.

For example, for the case of the battery pack, the length dimension of the battery module to which the positioning structure is adapted may be predetermined, and when the thickness of the battery cell 11 employed by a certain battery module is thin, the thickness of the spacer 40 employed by the battery module may be appropriately increased, with the predetermined length dimension being the standard, so that the battery module can eventually reach the length dimension. Correspondingly, when the thickness of the battery cell 11 employed by a certain battery module is thicker, the thickness of the separator 40 employed by the battery module can be appropriately reduced.

In addition, a protecting sleeve 50 is attached to the surface of the fixing member 30, and the protecting sleeve 50 is made of rubber or silica gel. Specifically, referring to fig. 1, the fixing member 30 is a long metal strap, the protecting sleeve 50 is a hollow strip-shaped rubber member, and the fixing member 30 can pass through the protecting sleeve 50, so that the protecting sleeve 50 is attached to the surface of the fixing member 30. It should be noted that the protecting sleeve 50 is mainly located at a position where the fixing member 30 contacts with the side surface of the battery cell 11, and the protecting sleeve 50 is disposed on both the side of the fixing member 30 facing the battery cell 11 and the side facing away from the battery cell 11, where the protecting sleeve 50 plays a role in preventing the fixing member 30 from scratching the battery cell 11 and also plays a role in preventing the battery module from being damaged due to external rubbing.

Referring to fig. 1, the battery modules further include protection sheets 60, and each battery module includes two protection sheets 60 respectively positioned between the end plates 20 at both ends of the battery module in the first direction and the adjacent battery cells 11. The protection sheet 60 is made of rubber or silica gel, and can prevent the metal end plate 20 from damaging the battery cell 11.

The battery assembly provided by the utility model comprises a shell and a plurality of battery modules arranged in the shell, when the battery modules adopt different types of battery cores 11, great difference occurs in length, so that the length of each battery module needs to be adjusted, and the length of each battery module can be kept consistent so as to be convenient for being matched with the shell of the battery assembly; in the battery module in the battery assembly, the spacers 40 are arranged between the battery cells 11, different battery modules can adopt the spacers 40 with different thicknesses, the spacers 40 play a role in adjusting the lengths of the battery cell 11 groups 10, and when the lengths of the battery cell 11 groups 10 of different battery modules are consistent, the end plates 20 and the fixing pieces 30 are used for fixing the battery cell 11 groups 10; by providing the spacer 40, the length of the battery pack internal brother battery module can be kept uniform.

The foregoing description of the embodiments and description is presented to illustrate the scope of the utility model, but is not to be construed as limiting the scope of the utility model. Modifications, equivalents, and other improvements to the embodiments of the utility model or portions of the features disclosed herein, as may occur to persons skilled in the art upon use of the utility model or the teachings of the embodiments, are intended to be included within the scope of the utility model, as may be desired by persons skilled in the art from a logical analysis, reasoning, or limited testing, in combination with the common general knowledge and/or knowledge of the prior art.

Claims

1. A battery assembly, comprising:

a housing; and

a plurality of battery modules which are suitable for being arranged and accommodated in the shell;

the battery module includes:

a cell group (10) comprising a plurality of cells (11) arranged along a first direction;

end plates (20) which are two in number and respectively abutted against two ends of the cell group (10) in the first direction;

a fixing member (30) connecting the two end plates (20) so that the two end plates (20) clamp and fix the cell group (10); and

a plurality of spacers (40);

wherein, a spacer is inserted between each adjacent battery cells (11), and the thickness of the spacer (40) in each battery module is suitable for keeping the length of the battery module where the spacer is positioned consistent with the lengths of other battery modules.

2. A battery pack according to claim 1, wherein at least one battery module has a cell (11) having a different thickness dimension in the first direction than the cells (11) of the other battery modules.

3. A battery assembly according to claim 1, wherein the separator (40) is a mica sheet, or a composite sheet of mica sheets and aerogel.

4. A battery pack according to claim 1, wherein the fixing member (30) is a fixing band which tightens around both of the end plates (20) to bind and fix the plurality of cells (11).

5. A battery pack according to claim 3, wherein the fixing member (30) is a metal strap.

6. The battery pack according to claim 4, wherein a protective sleeve (50) is attached to the surface of the fixing member (30), and the protective sleeve (50) is made of rubber or silica gel.

7. A battery pack according to claim 1, further comprising a protection sheet (60) which is provided in two in number and is located between the end plate (20) and the adjacent cell (11) at both ends of the battery module in the first direction, respectively.

8. A battery pack according to claim 7, wherein the protective sheet (60) is made of rubber or silicone.