CN216488330U

CN216488330U - Battery module

Info

Publication number: CN216488330U
Application number: CN202122452044.6U
Authority: CN
Inventors: 吴深琼; 赖增岩; 赵成明
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-05-10
Anticipated expiration: 2031-10-12

Abstract

The utility model provides a battery module which comprises a plurality of electric core groups, a module frame and a plurality of insulating sheets, wherein a plurality of electric core frames are arranged in the module frame, end plates are arranged at the upper end and the lower end of each electric core frame, a middle side plate is arranged between the electric core frames, and an outer side plate is arranged on the outer side surface of each outer electric core frame. The upper and lower both ends of electric core group are passed through the insulating piece and are connected with the end plate, the both sides of electric core group are connected or the outer panel is connected with middle curb plate through the fixed glue, guarantee the rigidity of connection between each electric core group under the condition that does not increase the part size, reduce battery module in use electric core and appear not hard up risk. The both ends of middle curb plate and outer panel respectively with end plate welded connection guarantees the intensity and the rigidity of whole module for whole battery module provides certain pretightning force, effectively resists the bulging force of electric core, guarantees that battery module is complete in the life cycle.

Description

Battery module

Technical Field

The utility model relates to the field of structures of battery modules, in particular to a battery module.

Background

In new energy car power battery package, because reasons such as battery package space limitation, energy demand, the battery module in the battery package need carry out integrated design, contains the battery module of multiseriate electricity core and is one of them more effectual integrated mode. How to guarantee that the battery module that contains multiseriate electricity core is not hard up at the vibration under the operating mode such as impact to and battery module structure still keeps the integrality under the effect of electricity core inflation power, finally guarantees the normal use of battery module, has become the problem that must solve. At present common multiseriate battery module connects through beating the mode of gluing between each row of electric core, makes to exist between each row of electric core and connects rigidity not enough, leads to battery module in use to have the not hard up risk of electric core. Use multiseriate electric core to arrange simultaneously and increased module end plate length size, lead to end plate rigidity weak, further need increase the rigidity that end plate thickness size strengthens the end plate, the increase of end plate thickness size occupies the dimensional space that a large amount of electric cores piled up the direction again for the space of battery package does not obtain make full use of.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a battery module, which includes an end plate, a cell group, a middle side plate, an outer side plate, and an insulating sheet. End plate and insulating piece are fixed respectively the both ends of electric core group, middle curb plate passes through the fixed glue to be fixed between the electric core group, and the outer panel passes through the fixed glue to be fixed on the lateral surface of electric core group in the outside, and the both ends of middle curb plate and outer panel are connected with the end plate respectively, for whole battery module provides certain pretightning force, guarantee the intensity and the rigidity of whole module, guarantee that the battery module is complete in construction in life cycle.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a battery module comprises a plurality of battery core groups and a module frame; the upper end and the lower end of the module frame are provided with end plates, and the module frame is divided into a plurality of cell frames by a plurality of middle side plates; two ends of the middle side plate are respectively provided with a folded edge; the folded edge is fixed on the end plate; the electric core group is fixed in the electric core frame.

Furthermore, two middle side plates are arranged between two adjacent electric core frames; two ends of the middle side plate are respectively provided with a folded edge; the middle side plates are connected through fixing glue.

Furthermore, the upper end and the lower end of each electric core frame are respectively and independently provided with one end plate; and two ends of the end plate are respectively connected with the adjacent middle side plates.

Furthermore, the same ends of a plurality of electric core frames share one end plate; a through groove for the middle side plate to pass through is formed in the position, corresponding to the middle side plate, on the end plate; a plurality of first through holes are formed in the end plate.

Further, one middle side plate is arranged between two adjacent electric core frames; two folding edges in opposite directions are respectively arranged at two ends of the middle side plate.

Furthermore, the module frame also comprises outer side plates which are respectively arranged at two sides of the end plate; the two ends of the outer side plate are respectively connected with the end plates; and a plurality of second through holes are formed in the middle of the end plate.

Further, the battery cell group comprises a plurality of battery cells; the maximum outer side surfaces of the electric cores at the upper end and the lower end of the electric core group are respectively connected with the end plates; the side surfaces of the two sides of the battery cell are connected with the middle side plate through fixing glue.

Furthermore, the battery module also comprises a plurality of insulation sheets; the insulation sheet is located between the battery cell and the end plate and connected with the battery cell and the end plate through fixing glue.

Further, a heat insulation pad is arranged between the electric cores.

The utility model provides a battery module, which comprises a plurality of electric core groups, a module frame and a plurality of insulating sheets, wherein a plurality of electric core frames are arranged in the module frame, end plates are arranged at the upper end and the lower end of each electric core frame, a middle side plate is arranged between the electric core frames, and an outer side plate is arranged on the outer side surface of each outer electric core frame. The upper and lower both ends of electric core group are passed through the insulating piece and are connected with the end plate, the both sides of electric core group are passed through the fixed glue and are connected or the outer panel is connected with middle curb plate, guarantee the rigidity of connection between each electric core group under the condition that does not increase the part size, reduce battery module in use electricity core and appear not hard up risk. The both ends of middle curb plate and outer panel respectively with end plate welded connection guarantees the intensity and the rigidity of whole module for whole battery module provides certain pretightning force, effectively resists the bulging force of electric core, guarantees that battery module is complete in life cycle structure.

Drawings

Fig. 1 is an exploded view illustrating the structure of a battery module according to the first embodiment;

fig. 2 is a schematic structural view of an end plate of the first embodiment;

FIG. 3 is a schematic view of a middle side plate structure of the first embodiment;

fig. 4 is a front view of the assembled battery module according to the first embodiment;

fig. 5 is an exploded view illustrating the structure of the battery module according to the second embodiment;

FIG. 6 is a schematic structural diagram of an end plate of the second embodiment;

FIG. 7 is a schematic view of a middle side plate structure of the second embodiment;

FIG. 8 is a front view of the assembled battery module of the second embodiment;

fig. 9 is an exploded view illustrating the structure of the battery module according to the third embodiment;

FIG. 10 is a schematic structural view of an end plate of a third embodiment;

FIG. 11 is a schematic structural view of a middle side plate of a third embodiment;

fig. 12 is a front view of the assembled battery module according to the third embodiment;

fig. 13 is an exploded view illustrating the structure of the battery module according to the fourth embodiment;

FIG. 14 is a schematic structural view of an end plate of the fourth embodiment;

FIG. 15 is a schematic view of a middle side plate structure of the fourth embodiment;

fig. 16 is a front view of the battery module according to the fourth embodiment after assembly.

Description of reference numerals: 1-end plate, 11-first through hole, 12-second through hole, 13-through groove, 2-battery cell, 3-middle side plate, 31-folded edge, 4-outer side plate, 5-insulating sheet and 6-fixing glue.

Detailed Description

The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

Example one

As shown in fig. 1, which is a schematic diagram of a battery module according to the first embodiment, the battery module includes two electric core groups, a module frame and four insulating sheets 5, and two electric core frames are disposed in the module frame; the electric core group is fixed in the electric core frame through fixing glue 6. Every both ends are equipped with an end plate 1 respectively about the electric core frame, are equipped with two intermediate side boards 3 between two electric core frames, connect through fixed glue 6 between two intermediate side boards 3 to increase the fixed strength between two electric core groups. The outside of every electric core frame is equipped with an outer panel 4, and every end plate 1 passes through welding mode with adjacent middle curb plate 3 and outer panel 4 and is connected, for the battery module provides certain pretightning force, guarantees the intensity and the rigidity of whole module, effectively resists the bulging force of electric core group, guarantees that the battery module is complete in the life cycle. The electric core group includes a plurality of electric cores 2 of arranging, and the 2 biggest lateral surfaces of electric core at both ends are connected with end plate 1 respectively about every electric core group, insulating piece 5 is fixed between electric core 2 and end plate 1 through solid fixed glue 6. The both sides side of electricity core 2 is connected through fixed glue 6 with middle curb plate 3 and outer panel 4 respectively to increase electric core 2 and the joint strength between middle curb plate 3 and the outer panel 4.

In a specific implementation, as shown in fig. 2, the end plate 1 is made of an extruded aluminum alloy, and two ends of the end plate 1 are respectively provided with a first through hole 11 penetrating from the top surface to the bottom surface for installing and fixing a battery module; meanwhile, a plurality of second through holes 12 penetrating from the top surface to the bottom surface are uniformly distributed, and the second through holes 12 are triangular, so that the strength of the end plate 1 is ensured, the weight is reduced, and the material is saved.

In specific implementation, the insulating sheet 5 is made of PP or PC material and is connected with the electric core 2 and the end plate 1 through the fixing glue 6, so as to increase the connection strength between the insulating sheet 5 and the electric core 2 and the end plate 1.

In the concrete implementation, as shown in fig. 3, middle curb plate 3 adopts the aluminium alloy punching press or the shaping of bending, is equipped with hem 31 at the both ends of middle curb plate 3 to in with hem 31 paste carry out welded fastening on the lateral surface of end plate 1, have the increase face of weld when making things convenient for welding operation, make the effect that the welding is more firm, for battery module provides certain pretightning force, guarantee the intensity and the rigidity of whole module, effectively resist the bulging force of electric core group, guarantee that battery module is complete in structure in life cycle. Insulating paint is sprayed on the inner surface of the middle side plate 3, or an insulating film or a hot-pressing insulating film is pasted on the inner surface of the middle side plate, so that the insulating property between the battery cell 2 and the middle side plate 3 is ensured.

In a specific implementation, the outer side plate 4 and the middle side plate 3 are made of the same material and have the same structure.

In specific implementation, the middle side plate 3, the outer side plate 4 and the end plate 1 are welded by laser, and fig. 4 is a front view of the assembled battery module.

In the concrete implementation, in every electric core group, still be equipped with the heat insulating mattress between electric core 2 and the electric core 2, the heat insulating mattress can adopt thermal-insulated buffer material such as silica gel bubble cotton, aerogel, is connected with electric core 2 through double faced adhesive tape etc. and plays thermal-insulated, cushioning effect.

In specific implementation, the fixing glue 6 can be structural glue or heat-conducting structural glue.

Example two

As shown in fig. 5, which is a schematic view illustrating an exploded structure of a battery module according to a second embodiment, the battery module includes two electric core groups, a module frame and four insulating sheets 5, and two electric core frames are disposed in the module frame; the electric core group is fixed in the electric core frame through fixing glue 6. Two the upper and lower both ends of electricity core frame are equipped with the end plate 1 of a sharing respectively, are equipped with a middle curb plate 3 between two electricity core frames, and the outside of every electricity core frame is equipped with an outer panel 4, the both ends of middle curb plate 3 and outer panel 4 respectively through the welding mode with end plate 1 is connected, for the battery module provides certain pretightning force, guarantees the intensity and the rigidity of whole module, effectively resists the bulging force of electricity core group, guarantees that the battery module is complete in the life cycle. The electric core group includes a plurality of electric cores 2 of arranging, and the 2 biggest lateral surfaces of electric core at both ends are connected with end plate 1 respectively about every electric core group, insulating piece 5 is fixed between electric core 2 and end plate 1 through solid fixed glue 6. The both sides side of electricity core 2 is connected through fixed glue 6 with middle curb plate 3 and outer panel 4 respectively to increase electric core 2 and the joint strength between middle curb plate 3 and the outer panel 4.

In specific implementation, as shown in fig. 6, the end plate 1 is made of an extruded aluminum alloy, and an upper vertical through groove 13 and a lower vertical through groove 13 are further formed in the middle of the end plate 1 and are used for passing through and being connected with the middle side plate 3; the upper surfaces of the two ends of the end plate 1 and the two sides of the through groove 13 are respectively provided with a first through hole 11 which penetrates from the top surface to the bottom surface and is used for installing and fixing a battery module; meanwhile, a plurality of second through holes 12 penetrating from the top surface to the bottom surface are uniformly distributed in the upper surface, the second through holes 12 are triangular, the strength of the end plate 1 is guaranteed, and meanwhile, the weight is reduced and the material is saved.

In the concrete implementation, as shown in fig. 7, middle curb plate 3 adopts the aluminium alloy punching press or the shaping of bending, is equipped with two opposite direction's hem 31 respectively at the both ends of middle curb plate 3 to in with hem 31 paste carry out welded fastening on the lateral surface of end plate 1, have the increase face of weld when making things convenient for welding operation, make the effect that the welding is more firm, provide certain pretightning force for battery module, guarantee the intensity and the rigidity of whole module, effectively resist the bulging force of electric core group, guarantee that battery module is complete in structure in the life cycle. Insulating paint is sprayed on the inner surface of the middle side plate 3, or an insulating film or a hot-pressing insulating film is pasted on the inner surface of the middle side plate, so that the insulating property between the battery cell 2 and the middle side plate 3 is ensured.

In specific implementation, insulating paint is sprayed on the inner surface of the outer side plate 4, or an insulating film is pasted on the inner surface of the outer side plate or a hot-pressing insulating film is pasted on the inner surface of the outer side plate, so that the insulating property between the battery cell 2 and the outer side plate 4 is ensured.

In specific implementation, the middle side plate 3, the outer side plate 4 and the end plate 1 are welded by laser welding, and fig. 8 is a front view of the battery module assembled by welding according to the second embodiment.

EXAMPLE III

Fig. 9 is an exploded schematic view of a battery module according to a third embodiment, where the battery module includes two electric core groups, a module frame and four insulating sheets 5, and two electric core frames are disposed in the module frame; the electric core group is fixed in the electric core frame through fixing glue 6. Two the upper and lower both ends of electricity core frame are equipped with the end plate 1 of a sharing respectively, are equipped with a middle curb plate 3 between two electricity core frames, and the outside of every electricity core frame is equipped with an outer panel 4, the both ends of middle curb plate 3 and outer panel 4 respectively through the welding mode with end plate 1 is connected, for the battery module provides certain pretightning force, guarantees the intensity and the rigidity of whole module, effectively resists the bulging force of electricity core group, guarantees that the battery module is complete in the life cycle. The electric core group includes a plurality of electric cores 2 of arranging, and the 2 biggest lateral surfaces of electric core at both ends are connected with end plate 1 respectively about every electric core group, insulating piece 5 is fixed between electric core 2 and end plate 1 through solid fixed glue 6. The two side surfaces of the electric core 2 are respectively connected with the middle side plate 3 and the outer side plate 4 through fixing glue 6, so that the connection strength between the electric core 2 and the middle side plate 3 and the outer side plate 4 is increased.

In a specific implementation, as shown in fig. 10, the end plate 1 is made of an extruded aluminum alloy, a vertical through groove 13 penetrating through the end plate 1 is formed in the middle of the end plate 1, and the through groove 13 extends from the top surface of the end plate 1 to the lower portion of the end plate 1 and is used for passing through and being connected with the middle side plate 3; the top surfaces of the two ends of the end plate 1 and the two sides of the through groove 13 are respectively provided with a first through hole 11 which penetrates from the top surface to the bottom surface and is used for installing and fixing a battery module; meanwhile, a plurality of second through holes 12 penetrating from the top surface to the bottom surface are uniformly distributed in the upper surface, the second through holes 12 are triangular, the strength of the end plate 1 is guaranteed, and meanwhile, the weight is reduced and the material is saved.

In specific implementation, as shown in fig. 11, the middle side plate 3 is formed by stamping or bending an aluminum alloy, two opposite-direction folded edges 31 are respectively arranged at two ends of the middle side plate 3, so that the folded edges 31 are attached to the outer side surface of the end plate 1 for welding and fixing, the welding operation is facilitated, the welding surface is increased, the welding is more stable, a certain pretightening force is provided for the battery module, the strength and the rigidity of the whole module are ensured, the expansive force of the battery pack is effectively resisted, and the structural integrity of the battery module in the life cycle is ensured; a gap is arranged between the folded edge 31 and the lower edge of the middle side plate 3 at the lower side so as to avoid the non-grooved part at the lower part of the end plate 1. Insulating paint is sprayed on the inner surface of the middle side plate 3, or an insulating film or a hot-pressing insulating film is pasted on the inner surface of the middle side plate, so that the insulating property between the battery cell 2 and the middle side plate 3 is ensured.

In a specific implementation, the middle side plate 3, the outer side plate 4 and the end plate 1 are welded by laser, and fig. 12 is a front view of the battery module assembled by welding according to the second embodiment.

Example four

Fig. 13 is an exploded schematic view of a battery module according to the fourth embodiment, where the battery module includes two electric core groups, a module frame and four insulating sheets 5, and two electric core frames are disposed in the module frame; the electric core group is fixed in the electric core frame through fixing glue 6. The upper end and the lower end of each of the two electric core frames are respectively provided with a common end plate 1, two symmetrically-arranged middle side plates 3 are arranged between the two electric core frames, and the two middle side plates 3 are connected through fixing glue 6; the outside of every electric core frame is equipped with an outer panel 4, the both ends of middle curb plate 3 and outer panel 4 respectively through the welding mode with end plate 1 is connected, for the battery module provides certain pretightning force, guarantees the intensity and the rigidity of whole module, effectively resists the bulging force of electric core group, guarantees that the battery module is complete in the life cycle structure. The electric core group includes a plurality of electric cores 2 of arranging, and the 2 biggest lateral surfaces of electric core at both ends are connected with end plate 1 respectively about every electric core group, insulating piece 5 is fixed between electric core 2 and end plate 1 through solid fixed glue 6. The both sides side of electricity core 2 is connected through fixed glue 6 with middle curb plate 3 and outer panel 4 respectively to increase electric core 2 and the joint strength between middle curb plate 3 and the outer panel 4.

In specific implementation, as shown in fig. 14, the end plate 1 is made of an extruded aluminum alloy, a vertical through groove 13 penetrating through the end plate 1 is formed in the middle of the end plate 1, and the through groove 13 extends from the top surface of the end plate 1 to the lower portion of the end plate 1 and is used for passing through and connecting with the middle side plate 3; the top surfaces of the two ends of the end plate 1 and the two sides of the through groove 13 are respectively provided with a first through hole 11 which penetrates from the top surface to the bottom surface and is used for installing and fixing a battery module; meanwhile, a plurality of second through holes 12 penetrating from the top surface to the bottom surface are uniformly distributed in the upper surface, the second through holes 12 are triangular, the strength of the end plate 1 is guaranteed, and meanwhile, the weight is reduced and the material is saved.

In specific implementation, as shown in fig. 15, the middle side plate 3 is formed by stamping or bending an aluminum alloy, and two ends of the middle side plate 3 are respectively provided with a folded edge 31, so that the folded edges 31 are attached to the outer side surface of the end plate 1 for welding and fixing, the welding operation is facilitated, and meanwhile, the welding surface is increased, so that the welding is more stable, a certain pre-tightening force is provided for the battery module, the strength and the rigidity of the whole module are ensured, the expansion force of the electric core group is effectively resisted, and the structural integrity of the battery module in the life cycle is ensured; a gap is arranged between the folded edge 31 and the lower edge of the middle side plate 3 to avoid the non-grooved part at the lower part of the end plate 1. The inner surface of the middle side plate 3 is sprayed with insulating paint or is pasted with an insulating film or is hot-pressed with the insulating film, so that the insulating property between the battery core 2 and the middle side plate 3 is ensured; the two middle side plates 3 are symmetrically arranged, and one side of each middle side plate is provided with a folded edge 31 which faces to each electric core group.

In a specific implementation, the middle side plate 3, the outer side plate 4 and the end plate 1 are welded by laser, and fig. 16 is a front view of the battery module assembled by welding according to the second embodiment.

The utility model provides a battery module, which comprises a plurality of electric core groups, a module frame and a plurality of insulating sheets, wherein a plurality of electric core frames are arranged in the module frame, end plates are arranged at the upper end and the lower end of each electric core frame, a middle side plate is arranged between the electric core frames, and an outer side plate is arranged on the outer side surface of each outer electric core frame. The upper and lower both ends of electric core group are passed through the insulating piece and are connected with the end plate, the both sides of electric core group are passed through the fixed glue and are connected or the outer panel is connected with middle curb plate, guarantee the rigidity of connection between each electric core group under the condition that does not increase the part size, reduce battery module in use electricity core and appear not hard up risk. The both ends of middle curb plate and outer panel respectively with end plate welded connection guarantees the intensity and the rigidity of whole module for whole battery module provides certain pretightning force, effectively resists the bulging force of electric core, guarantees that battery module is complete in the life cycle.

In the description of the present invention, it is to be understood that the terms "intermediate", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", and the like are used in an orientation or positional relationship indicated on the basis of the orientation or positional relationship shown in the drawings, which is for convenience of description and simplicity of description only, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the first feature may be "on" the second feature in direct contact with the second feature, or the first and second features may be in indirect contact via an intermediate. "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The above description is for the purpose of illustrating embodiments of the utility model and is not intended to limit the utility model, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the utility model shall fall within the protection scope of the utility model.

Claims

1. A battery module is characterized by comprising a plurality of battery core groups and a module frame; the upper end and the lower end of the module frame are provided with end plates (1), and the module frame is divided into a plurality of electric core frames by a plurality of middle side plates (3); two ends of the middle side plate (3) are respectively provided with a folded edge (31); the folded edge (31) is fixed on the end plate (1); the electric core group is fixed in the electric core frame.

2. The battery module according to claim 1, wherein there are two intermediate side plates (3) between adjacent two of the core frames; two ends of the middle side plate (3) are respectively provided with a folded edge (31); the middle side plates (3) are connected through fixing glue (6).

3. The battery module according to claim 2, wherein each of the upper and lower ends of the core frame is provided with one of the end plates (1) separately; and two ends of the end plate (1) are respectively connected with the adjacent middle side plate (3).

4. The battery module according to claim 2, wherein the same end of a plurality of the core frames shares one end plate (1); a through groove (13) for the middle side plate (3) to pass through is arranged at the position, corresponding to the middle side plate (3), on the end plate (1); a plurality of first through holes (11) are formed in the end plate (1).

5. The battery module according to claim 1, wherein one of the intermediate side plates (3) between adjacent two of the core frames; two folding edges (31) with opposite directions are respectively arranged at two ends of the middle side plate (3).

6. The battery module according to claim 5, wherein the same end of a plurality of the core frames shares one end plate (1); a through groove (13) for the middle side plate (3) to pass through is arranged at the position, corresponding to the middle side plate (3), on the end plate (1); a plurality of first through holes (11) are formed in the end plate (1).

7. The battery module according to any one of claims 1 to 6, wherein the module frame further comprises outer side plates (4) provided on both sides of the end plates, respectively; the two ends of the outer side plate (4) are respectively connected with the end plate (1); a plurality of second through holes (12) are formed in the middle of the end plate (1).

8. The battery module according to any one of claims 1 to 6, characterized in that the battery pack comprises a plurality of battery cells (2); the maximum outer side surfaces of the electric cores (2) at the upper end and the lower end of the electric core group are respectively connected with the end plate (1); the side surfaces of two sides of the battery cell (2) are connected with the middle side plate (3) through fixing glue (6).

9. The battery module according to claim 8, further comprising a plurality of insulating sheets (5); the insulation sheet (5) is located between the battery cell (2) and the end plate (1) and connected with the battery cell through a fixing glue (6).

10. The battery module according to claim 8, characterized in that a heat insulation pad is further arranged between the electric cores (2).