CN215184260U

CN215184260U - Fixing structure of battery module

Info

Publication number: CN215184260U
Application number: CN202121029551.2U
Authority: CN
Inventors: 杨丹; 徐超; 刘浩
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2021-12-14
Anticipated expiration: 2031-05-13

Abstract

The utility model provides a fixed knot of battery module constructs, include: a battery module; the end plates are positioned at two ends of the battery module and used for clamping the battery module; the fixed band is established in the periphery of battery module and end plate to tie battery module and end plate and become an organic whole. The utility model provides a fixed band can adjust according to the actual length of battery module, width, ties up battery module and the end plate that is located battery module both ends through the ribbon machine, plays the fixed action to battery module. Compared with the existing side plate and end plate combination, the cost is saved, and the adaptability is improved. In addition, the firmness of the fixing structure is improved, and meanwhile, the danger of scattering of the battery module due to the fact that the fixing belt is damaged due to expansion of the battery core is avoided.

Description

Fixing structure of battery module

Technical Field

The utility model belongs to the technical field of lithium ion battery, concretely relates to fixed knot of battery module constructs.

Background

With the continuous popularization of new energy automobiles, the use requirements of power batteries in the new energy automobiles become higher and higher, and particularly, the requirements of users on the continuous mileage of the new energy automobiles are continuously improved. In order to meet the power requirement of an automobile, a plurality of lithium batteries need to be connected in series and parallel to form a battery module, then the plurality of battery modules are connected in series and parallel to form a large module, and the length or the width of a lithium battery pack finally used on the automobile generally exceeds 1 m.

Each battery module needs an independent fixing structure, so that the assembly is complex, and the fixing structure occupies space, thereby reducing the overall capacity and increasing the weight. Fixed knot constructs including end plate and the curb plate around battery module periphery setting, and end plate and curb plate pass through welding mode fixed mounting, and its size of a dimension is fixed, and the suitability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fixed knot of battery module that suitability is strong constructs, its adaptable various sizes's battery module is fixed, improves its suitability greatly.

The utility model discloses a concrete technical scheme as follows:

a fixing structure of a battery module, comprising:

a battery module;

the end plates are positioned at two ends of the battery module and used for clamping the battery module;

the fixed band is established in the periphery of battery module and end plate to tie battery module and end plate and become an organic whole.

Further scheme, the fixed band includes parallel arrangement's steel ribbon and plastics ribbon.

According to the scheme, the end plate comprises an end plate body and an insulating cover located on the inner side wall of the end plate body, one side of the insulating cover is connected with the end plate body, and the other side of the insulating cover is abutted to the battery module.

Further scheme, offering of the lateral wall of end plate body is used for carrying out spacing ribbon spacing groove to the fixed band.

Further, the end plate body is made of metal, and the end plate body and the insulating cover are of an integrated structure formed by die casting or injection molding.

The end plate is contacted with the battery cell through an insulating cover made of insulating materials, so that the insulativity of the battery module is improved; the outer side of the end plate body is made of metal materials (such as aluminum), so that the overall strength is improved. Offer at the lateral wall of end plate body and be used for carrying on spacing ribbon spacing groove to the fixed band, the operation is tied up to the fixed band of being convenient for to it produces the skew to have avoided it.

Further scheme, the battery module includes two at least electric core subassemblies, electric core subassembly superposes at its width direction, bonds through insulating separator between two liang of adjacent electric core subassemblies and becomes integrative.

In a further scheme, the electric core assembly comprises at least two electric cores, the electric cores are overlapped in the thickness direction of the electric cores, and every two adjacent electric cores are connected into a whole through a gum insulating spacer.

Preferably, the insulating partition plate comprises a heat insulation plate body, and two side faces of the heat insulation plate body are covered with double-sided adhesive tapes or structural adhesive layers; the thickness of the back adhesive insulation spacer is 0.2-2mm, the back adhesive insulation spacer comprises a foam body, and two side faces of the foam body are covered with double-faced adhesive tapes or adhesive layers of coating structures.

The insulating partition board is covered with the double faced adhesive tape or the coating structure adhesive layer through two side faces to connect two adjacent electric core components, and the heat insulation board body also plays the roles of insulation and heat insulation, so that the electric conduction and the heat diffusion between the electric core components are avoided, and the safety of the whole device is improved. Every two adjacent electric cores are connected through a back adhesive insulation spacer, namely the back adhesive insulation spacer bonds the two adjacent electric cores through a double-faced adhesive tape or a coating structure adhesive layer covered on the side surface of the back adhesive insulation spacer, so that the effect of bonding the electric cores is achieved; simultaneously because the cotton body of bubble possesses the compressibility, consequently can improve the fixed pretightning force of module at the initial stage of uniting, and then can absorb the bulging force of electric core at module circulation end.

In a further scheme, the positive pole column and the negative pole column of the battery cell are positioned on the same end face of the battery cell, and the positive pole column and the negative pole column of all the battery cells in the battery cell assembly are arranged in the same direction.

In a further scheme, the battery module further comprises an integrated acquisition board and an upper cover which are positioned at the top end of the battery module, wherein the integrated acquisition board is used for respectively connecting the positive pole and the negative pole of the battery cell in series; the two ends of the integrated acquisition board are connected with the end plates through buckles or bolts, and the upper cover is fixedly connected with the integrated acquisition board through bolts or screws.

The utility model discloses the quantity of well electric core and electric core subassembly can design according to actual electric quantity needs and installation space size, and size, the shape of battery module can be designed along with installation space promptly, have improved its suitability. Additionally, the utility model provides a fixed band can adjust according to the actual length of battery module, width, ties up battery module and the end plate that is located battery module both ends through the ribbon machine, plays the fixed action to battery module. Compared with the existing side plate and end plate combination, the cost is saved, and the adaptability is improved.

In addition, this application adopts steel ribbon and plastics ribbon to fix respectively at the upper and lower end of battery module, has improved the fastness of fixed band, has also avoided damaging the fixed band because of electric core inflation simultaneously, and leads to battery module to scatter danger.

Drawings

FIG. 1 is a view showing the use state of the fixing structure of the present invention,

figure 2 is a disassembled view of the fixation structure of figure 1,

in the figure: 1-battery module, 11-battery core assembly, 12-battery core, 13-insulating partition board and 14-gum insulating spacer;

2-fixing band, 21-steel band, 22-plastic band;

3-end plate, 31-end plate body, 32-insulating cover, 33-ribbon limiting groove;

4-integrated collecting plate, 5-upper cover.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention.

As shown in fig. 1-2, a fixing structure of a battery module includes:

the battery pack comprises a battery module 1, end plates 3 and fixing bands 2, wherein the end plates 3 are positioned at two ends of the battery module 1 and clamp the battery module 1 (the right end plate is not shown in fig. 2); the fixed band 2 is sleeved on the peripheries of the battery module 1 and the end plate 3, and the battery module 1 and the end plate 3 are bound into a whole.

Further, the fixing band 2 comprises a steel band 21 and a plastic band 22 which are arranged in parallel. Referring to fig. 1-2, in the embodiment, the steel bands are located above the battery modules, and the plastic bands (e.g., PVC bands) are located below the battery modules, thereby providing a strong fixing effect to the battery modules. The firmness of the fixing belt is improved, and meanwhile, the fixing belt is prevented from being damaged due to expansion of the battery cell, so that the battery module is prevented from being scattered.

Further, the end plate 3 includes an end plate body 31 and an insulation cover 32 located on the inner side wall of the end plate body 31, one side of the insulation cover 32 is connected with the end plate body 31, and the other side of the insulation cover is abutted to the battery module 1. The end plate body 31 is made of metal, and the end plate body 31 and the insulating cover 32 are of an integral structure formed by die casting or injection molding. Namely, the end plate is contacted with the battery cell through an insulating cover made of insulating materials, so that the insulativity of the battery module is improved; the outer side of the end plate body is made of metal materials (such as aluminum), so that the overall strength is improved.

Further, the outer side wall of the end plate body 31 is provided with a binding belt limiting groove 33 for limiting the fixing belt. Offer at the lateral wall of end plate body and be used for carrying on spacing ribbon spacing groove to the fixed band, the operation is tied up to the fixed band of being convenient for to it produces the skew to have avoided it.

Further, in this embodiment, the battery module 1 includes two electric core assemblies 11, the electric core assemblies 11 are overlapped in the width direction thereof, and two adjacent electric core assemblies 11 are bonded into a whole through the insulating partition plate 13.

In a further scheme, the battery core assembly 11 includes 40 battery cells 12, the battery cells 12 are stacked in the thickness direction thereof, and every two adjacent battery cells 12 are connected into a whole through a gum insulating spacer 14.

Preferably, the insulating partition 13 comprises a heat insulation board body, and two side faces of the heat insulation board body are covered with double-sided adhesive tapes or structural adhesive layers; the thickness of the back adhesive insulation spacer 14 is 0.2-2mm, the back adhesive insulation spacer 14 comprises a foam body, and two side faces of the foam body are covered with double-sided adhesive or a coating structure adhesive layer.

In a further scheme, the positive pole column and the negative pole column of the electric core 12 are located on the same end face of the electric core, and the positive pole column and the negative pole column of all the electric cores 12 in the electric core assembly 11 are arranged in the same direction.

In a further scheme, as shown in fig. 1, the battery module further comprises an integrated collecting plate 4 and an upper cover 5, which are located at the top end of the battery module 1, wherein the integrated collecting plate 4 connects the positive and negative poles of the battery cell 12 in series respectively; the two ends of the integrated acquisition board 4 are connected with the end plate 3 through buckles or bolts, and the upper cover 5 is fixedly connected with the integrated acquisition board 4 through bolts or screws.

During assembly, the electric core assembly 11 is assembled according to the size of an installation space, namely, a plurality of electric cores 12 are selected according to the size, the positive and negative poles of all the electric cores 12 are arranged in the same direction, and every two adjacent electric cores 12 are bonded into a whole through the gum insulating spacers 14, so that the electric core assembly 11 is formed. Then, several cell modules 11 are selected according to the size and are stacked in the width direction, and every two adjacent cell modules 11 are bonded into a whole through an insulating partition plate 13, so that the battery module 1 is formed. Then connecting the positive and negative poles of all the battery cells with the integrated acquisition plate 4, and connecting the two ends of the integrated acquisition plate 4 with the end plate 3 through bolts; then an upper cover 5 is arranged above the collecting plate 3 and fixed through bolts; finally, the end plates 3 at the two ends are installed, and the end plates and the battery module 1 are fastened and fixed together at the upper end and the lower end of the battery module 1 along the length direction of the battery module 1 by using steel ties 21 and plastic ties 22.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a fixed knot of battery module constructs which characterized in that: the method comprises the following steps:

a battery module (1);

end plates (3) which are positioned at both ends of the battery module (1) and clamp the battery module;

and the fixing belt (2) is sleeved on the peripheries of the battery module (1) and the end plate (3) and is used for binding the battery module (1) and the end plate (3) into a whole.

2. The fixing structure of a battery module according to claim 1, wherein: the fixing band (2) comprises a steel binding band (21) and a plastic binding band (22) which are arranged in parallel.

3. The fixing structure of a battery module according to claim 1, wherein: the end plate (3) comprises an end plate body (31) and an insulating cover (32) located on the inner side wall of the end plate body (31), one side of the insulating cover (32) is connected with the end plate body (31), and the other side of the insulating cover is abutted to the battery module (1).

4. The fixing structure of a battery module according to claim 3, wherein: the outer side wall of the end plate body (31) is provided with a binding belt limiting groove (33) used for limiting the fixing belt.

5. The fixing structure of a battery module according to claim 3, wherein: the end plate body (31) is made of metal, and the end plate body (31) and the insulating cover (32) are of an integral structure through die casting or injection molding.

6. The fixing structure of a battery module according to claim 1, wherein: the battery module (1) comprises at least two electric core assemblies (11), the electric core assemblies (11) are overlapped in the width direction of the electric core assemblies, and every two adjacent electric core assemblies (11) are bonded into a whole through an insulating partition plate (13).

7. The structure of claim 6, wherein: the battery core assembly (11) comprises at least two battery cores (12), the battery cores (12) are overlapped in the thickness direction of the battery cores, and every two adjacent battery cores (12) are connected into a whole through a gum insulating spacer (14).

8. The structure of claim 7, wherein: the insulating partition plate (13) comprises a heat insulation plate body, and two side faces of the heat insulation plate body are covered with double-sided adhesive tapes or structural adhesive layers; the thickness of the back adhesive insulation spacer (14) is 0.2-2mm, the back adhesive insulation spacer (14) comprises a foam body, and two side faces of the foam body are covered with double-sided adhesive or a coating structure adhesive layer.

9. The structure of claim 7, wherein: the positive pole column and the negative pole column of the battery cell (12) are located on the same end face of the battery cell, and the positive pole column and the negative pole column of all the battery cells (12) in the battery cell assembly (11) are arranged in the same direction.

10. The structure of claim 7, wherein: the battery module is characterized by further comprising an integrated acquisition board (4) and an upper cover (5), wherein the integrated acquisition board (4) is positioned at the top end of the battery module (1), and positive and negative poles of the battery cell (12) are respectively connected in series through the integrated acquisition board (4); the two ends of the integrated acquisition board (4) are connected with the end plate (3) through buckles or bolts, and the upper cover (5) is fixedly connected with the integrated acquisition board (4) through bolts or screws.