KR101478701B1 - Coupling Member Including Welding Connecting Portion and Coupling Recess Portion and Battery Module Assembly Employed with the Same - Google Patents

Abstract

The present invention relates to a plate-like binding member for connecting and fixing a base plate and an upper cover plate of a battery module assembly, the plate-like binding member comprising: at least one welded portion mounted on the base plate and welded thereto; At least one fastening recess corresponding to the fastening protrusion of the upper cover plate; A fastener positioned on the fastening indentation portion and fastened and fixed to the upper cover plate by the fastening member; And a plate-shaped body having the welded portion formed at a lower portion thereof and the fastening recessed portion formed at an upper portion thereof; And a battery module assembly including the same.

Description

[0001] The present invention relates to a binding member including a welding portion and a fastening portion, and a battery module assembly including the fastening member.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binding member having a novel structure and a battery module assembly including the binding member. More particularly, the present invention relates to a plate-like binding member for connecting and fixing a base plate and an upper cover plate of a battery module assembly, One or more welded joints mounted and welded; At least one fastening recess corresponding to the fastening protrusion of the upper cover plate; A fastener positioned on the fastening indentation portion and fastened and fixed to the upper cover plate by the fastening member; And a plate-like main body having the welded portion formed at the lower portion and the fastening portion formed at the upper portion thereof.

Due to the development of technology and demand for mobile devices, the demand for secondary batteries is also rapidly increasing. Among them, lithium secondary batteries, which have high energy density and high operating voltage and excellent storage and life characteristics, It is widely used as an energy source.

The secondary battery is roughly classified into a cylindrical battery, a prismatic battery and a pouch-shaped battery according to the structural characteristics of the outside and the inside. Among them, the secondary battery can be stacked with a high degree of integration, and prismatic batteries and pouch- .

In addition, the secondary battery is attracting attention as an energy source for electric vehicles, hybrid electric vehicles, and the like, which is proposed as a solution for air pollution in existing gasoline vehicles and diesel vehicles using fossil fuels. Therefore, the application type of the secondary battery is diversifying due to the advantages of the secondary battery, and it is expected that the secondary battery will be applied to more fields and products than now.

As the application fields and products of the secondary battery are diversified, the type of the battery is also diversified to provide an appropriate output and capacity. In addition, there is a strong demand for miniaturization and weight reduction of cells applied to the field and products.

For example, a small mobile device such as a mobile phone, a PDA, a digital camera, a notebook computer, etc., has one or a few small and light-weight battery cells per device corresponding to the tendency to miniaturize the products. On the other hand, a middle- or large-sized device such as an electric vehicle or a hybrid electric vehicle uses a battery module (also referred to as a "middle- or large-sized battery pack") in which a large number of battery cells are electrically connected, The size and weight of the battery are directly related to the accommodation space and the output of the mid- to large-sized devices, manufacturers are trying to manufacture a battery module as small and light as possible.

Conventionally, in assembling the battery modules, a method of stacking a plurality of battery modules, fixing the upper and lower fixing plates to each other to complete fixing between the battery modules, and fixing them separately inside the frame has been used. Method is causing the overall volume of the battery module assembly to increase. Also, this battery module assembly is mounted on an upper cover composed of a single plate. This type of battery module assembly is composed of a cover covering plate when the side surfaces of the upper and lower covers are in surface contact with each other, Or interference due to product tolerances may occur, resulting in complete coverage. Or it is too loose so that it is difficult to determine the fastening position. Further, since it is difficult to determine the upper and lower covers and the fastening position of a single plate, there is a risk that the assembling worker may be injured. In other words, during the fastening process for a cover composed of a single plate, an operator's wound due to the sharp plate edge can be generated.

Further, when a separate assembly auxiliary structure is used for the assembly process, an additional process by the auxiliary structure is separately required. Moreover, the additional process for these auxiliary structures significantly reduces the efficiency of the entire production process, leading to the disadvantage that the assembled worker must have a skilled working skill in this regard.

Therefore, there is a high need for a technology that can fundamentally solve these problems.

The present invention aims to solve the problems of the prior art and the technical problems that have been requested from the past.

The inventors of the present application have conducted intensive research and various experiments to construct the structure of the fastening portion, the fastening portion, and the welded portion corresponding to the fastening protrusion of the upper cover plate on the plate- In the structure, it is necessary to develop a binding member of a novel structure which minimizes the interference when vertically tightening only with a general level tolerance management, and has a self-positioning structure so that it can be positively assembled without a separate auxiliary structure Respectively.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an apparatus and a method for assembling an upper cover plate and an upper cover plate so that the upper and lower covering structures can be easily achieved without constituting additional parts, And an object of the present invention is to provide a binding member of a novel structure and a battery module assembly including the binding member capable of achieving an effect of preventing an injury of an assembly worker as well as an efficiency of a production process.

According to an aspect of the present invention,

A plate-like binding member for interconnecting and fixing a base plate and an upper cover plate of a battery module assembly,

At least one welded portion mounted on the base plate and welded thereto;

At least one fastening recess corresponding to the fastening protrusion of the upper cover plate;

A fastener positioned on the fastening indentation portion and fastened and fixed to the upper cover plate by the fastening member; And

A plate-like body having the welded portion formed at the lower portion thereof and the fastening portion formed at the upper portion thereof;

As shown in FIG.

Therefore, since the bundling member according to the present invention includes the welded portion, the fastening portion, the fastener and the plate-shaped body having a specific structure, in the vertical covering structure of the battery module assembly, It is possible to positively assemble without a separate assembly auxiliary structure in order to have a self-positioning structure.

In addition, the binding member according to the present invention can achieve the effect of increasing the efficiency of the production process by allowing the upper and lower covering structures to be easily achieved without constituting additional parts, and the upper cover plate can be stably mounted and fixed to the base plate Thus, the efficiency of the production process can be increased and the prevention effect of the assembly worker can be achieved at the same time.

In one preferred example, the binding member is made of a metal plate material having predetermined elasticity, which can be produced by a press molding method. Also, the upper cover plate may be made of a metal plate including a predetermined elasticity.

Therefore, when the fastening protrusion of the upper cover plate is engaged with the indent of the corresponding fastening member, it can be stably and easily fastened by deformation and restoration by self-elasticity.

As previously defined, the binding member includes a weld joint, which can be secured to the base plate weld. The fixing method is not particularly limited as long as it can firmly fix the welded portion from the base plate in response to external vibration and impact, but can be fixed by spot welding, for example.

The base plate welded portion may preferably be a structure having a herming shape bent in the inward direction.

Since the humming shape of the base plate has a stiffness twice as high as that of the other portion made of a single plate, the welded binding member can be more firmly fixed. In addition, since the humming shape includes rounded corners, it is possible to provide a worker in the assembling process with an effect of preventing a safety accident such as a wound on a sharp edge.

The fastening indentation may be formed, for example, at a depth of 1.5 to 20 times the thickness of the upper cover plate, preferably at a depth of 2 to 10 times the thickness of the upper cover plate.

In addition, the fastening depressions may be structured such that protrusions of the upper cover plate can be vertically slidably mounted, and preferably extended in the height direction in the plate-like body portion.

In one preferred example, the projecting portion of the upper cover plate may have a hemispherical shape corresponding to the depth of the fastening recess so that the projecting portion of the upper cover plate can be stably stuck or detached on the fastening recess of the fastening member. have.

Therefore, the depressed portion forms a width corresponding to the width of the protruded portion so that the protruded portion of the upper cover plate can only move in the vertical direction, and the seating portion corresponding to the depth of the clamped depressed portion is formed, And in addition, a fast and safe assembly process can be performed.

In addition, the protrusion of the upper cover plate may have a humming shape, which is preferably bent in the inward direction.

Such a humming structure has a stiffness twice as high as that of the other portion made of a single plate, as described above. Therefore, the upper cover plate, which is fixed to the base plate by the binding member, can be more firmly fixed. In addition, since the humming shape includes rounded corners, it is possible to provide a worker in the assembling process with an effect of preventing a safety accident such as a wound on a sharp edge.

The plate-like body may preferably have a structure including at least one groove formed in the longitudinal direction so as to secure its own rigidity.

The groove may be formed at a depth of 1.5 to 20 times the thickness of the plate-like body, for example.

Specifically, the groove can be formed by press forming or bending. The coupling member in which such a groove is formed can effectively withstand external vibration and shock applied in a direction perpendicular to the groove direction. Further, when the coupling member including such a groove is welded to the base plate, the rigidity of the product itself is further increased, so that a more stable and robust product can be produced in constructing the entire battery module assembly.

In one preferred embodiment, the plate-like body may have at least one fastening hole at each end thereof so as to be fastened to the base plate.

Specifically, the plate-like body may be fixed to the welded portion through a fastener formed at both ends after being coupled to the base plate. Such a fastener can be a means that can be engaged with another internal part, so that it is possible to further increase its own rigidity without any additional member and to perform the fastening and binding with other internal parts.

The size of such a plate-like body may be a structure having a length of 30% to 120% of the length of the base plate so as to achieve easiness in the binding process with the upper cover plate and at the same time to have a firm fixing effect, And may have a length of 90% to 100%.

In another preferred embodiment, the binding member according to the present invention comprises:

A plate-like binding member for interconnecting and fixing a base plate and an upper cover plate of a battery module assembly,

At least one welded portion mounted on the base plate and welded thereto;

At least one fastening recess corresponding to the fastening protrusion of the upper cover plate;

A fastener positioned on the fastening indentation portion and fastened and fixed to the upper cover plate by the fastening member; And

A plate-like body having the welded portion formed at the lower portion thereof and the fastening portion formed at the upper portion thereof;

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Since such a coupling member can easily achieve the vertical covering structure without any additional components, the efficiency of the production process can be increased, and the upper cover plate can be stably mounted and fixed to the base plate. It is possible to provide an effect of preventing an injury of an assembly worker as well as an efficiency increase effect.

The present invention also provides a battery module assembly including at least one binding member, and a device including the battery module assembly as a power source, the device including at least one of an emergency power source device, a computer room power source device, , Medical equipment power supply, fire extinguishing equipment power supply, alarm equipment power supply, or evacuation facility power supply, but is not limited thereto.

The structure and manufacturing method of such a device are well known in the art, so a detailed description thereof will be omitted herein.

As described above, the binding member according to the present invention has the structure of the fastening indentation portion, the fastening portion, and the welded portion corresponding to the fastening projection of the upper cover plate to the plate-shaped body, , It is possible to minimize the interference when vertically tightening with only general level tolerance management, and to assemble itself positively without a separate auxiliary structure to have its own positioning structure. In addition, it is possible to easily achieve the upper and lower covering structure without the configuration of additional parts, thereby achieving an effect of increasing the efficiency of the production process and enabling the upper cover plate to be stably mounted and fixed to the base plate, It is possible to provide an effect of preventing an assembly worker from being injured.

1 is a perspective view of a binding member according to one embodiment of the present invention;
FIG. 2 is a perspective view showing a state where the binding member of FIG. 1 is mounted on the base plate;
3 is a perspective view showing a state where the battery module is seated on the base plate of FIG. 2;
4 is a perspective view showing a state in which an assembly cover is mounted on the upper surface of the battery module of FIG. 3;
5 is a perspective view showing a state where a cable is mounted on the top of the assembly cover of FIG. 4;
FIG. 6 is a perspective view of the base plate of FIG. 2 with the upper cover plate mounted;
7 is a vertical sectional view showing a state in which the binding member and the base plate according to the present invention are joined together.

Hereinafter, the present invention will be described in detail with reference to the drawings, but the scope of the present invention is not limited thereto.

FIG. 1 is a perspective view of a binding member 400 according to an embodiment of the present invention, and FIG. 2 shows a binding member 400 mounted on a base plate 300 according to an embodiment of the present invention A perspective view showing a state in which a user is present.

Referring to these drawings, the binding member 400 includes a welded portion 420 welded to the side wall 330 of the base plate 300, indents (not shown) coupled in a fastening manner to the upper cover plate And fasteners 411, 412, and 413 formed in the respective indentations 401, 402, and 403 and the indentations 401, 402, and 403, respectively.

The base plate 300 is formed with receiving portions 301, 302, 303 and 304 on which battery modules (not shown) can be mounted. The binding member 400 is welded to the sidewall 330 having the upwardly bent structure on the outer peripheral surface of the base plate 300.

3 is a perspective view showing a state in which the battery modules 101, 102, 103 and 104 are seated on the base plate 300 of FIG. 2, and FIG. 4 is a perspective view of the battery modules 101, 102, And 104 are mounted on the upper surface of the assembly cover 500. As shown in FIG.

2, the battery modules 101, 102, 103, and 104 are respectively seated in the module receiving portions 301, 302, 303, and 304 of the base plate 300, respectively. The mounted battery modules 101, 102, 103, and 104 are mounted and fixed by the assembly cover 500.

FIG. 5 is a perspective view showing a state where cables 610, 620, 630, and 640 are mounted on the upper end of the assembly cover 500 of FIG.

Referring to FIG. 5, power cables 610 and 620, a voltage detecting cable 640, and a communication cable 630 are mounted and fixed to the top of the assembly cover 500.

A BMS (not shown) is mounted on the rear central portion 340 of the base plate 300 and a connection terminal 642 of the voltage detecting cable 640 and a communication cable (not shown) 630 are connected to each other.

A plug-in connector 700 of a housing structure in which the power cable 610 and the end portion of the communication cable 630 are assembled is mounted at the center of the front surface of the base plate 300.

6 is a perspective view showing a state in which the upper cover plate 800 is attached to the base plate 300 of FIG. 2, and FIG. 7 is a perspective view of the coupling plate 400 and the base plate 300 according to the present invention. A vertical cross-sectional view showing the state of the semiconductor device is shown.

1 and 2, the upper cover plate 800 includes a downwardly curved side wall 810 and is coupled by a binding member 400 mounted on the base plate 300. As shown in FIG.

Specifically, the upper cover plate 800 includes indentations 401, 402, and 403 formed on the binding member 400 and corresponding protrusions 811, 812, and 813. These protrusions 811, 812 and 813 are formed by fasteners 411, 412 and 413 which can be fastened to the fasteners 411, 412 and 413 of the indentations 401, 402 and 403 respectively by bolts .

The upper cover plate 800 and the binding member 400 are fastened by using the elastic deformation 816 of the upper cover plate 800 so that the upper cover plate 800 is fastened to the binding member 400 So that the fastening and assembling process can be further facilitated through the fastening method.

The welded portion 335 of the sidewall 330 of the base plate 300 is formed into a humming shape 335 bent in the inward direction and the end portion 815 of the sidewall 810 of the upper cover plate 800 is also inwardly And is formed into a humming shape 815 that is bent in the direction of the arrow.

Therefore, the upper cover plate 800 can be more easily fastened to the binding member 400, and a safety accident of the assembling worker can be prevented by the humming shapes 335 and 815 having the rounded end portions.

On the other hand, the upper cover plate 800 has reinforcing beads 820 formed on the outer surface thereof to improve its rigidity, and a plurality of ventilation holes 830 are formed along corners of the outer periphery.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Claims (17)

A plate-like binding member for interconnecting and fixing a base plate and an upper cover plate of a battery module assembly,
At least one welded portion mounted on the base plate and welded thereto;
At least one fastening recess corresponding to the fastening protrusion of the upper cover plate;
A fastener positioned on the fastening indentation portion and fastened and fixed to the upper cover plate by the fastening member; And
A plate-like body having the welded portion formed at the lower portion thereof and the fastening portion formed at the upper portion thereof;
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Wherein the fastening indentation portion is formed to extend in the height direction in the plate-like main body portion so that the projecting portion of the upper cover plate can be seated while sliding in the vertical direction. The binding member according to claim 1, wherein the binding member is made of a metal plate having elasticity. The binding member according to claim 1, wherein the binding member is manufactured by a press forming method. The binding member according to claim 1, wherein the welded portion is mounted and fixed to the base plate by spot welding. [2] The apparatus of claim 1, wherein the base plate includes a base plate welded portion welded to the welded portion of the binding member, and the base plate welded portion has a herming shape bent in the inward direction Lt; / RTI > The binding member according to claim 1, wherein the fastening indent is formed at a depth of 1.5 to 20 times the thickness of the upper cover plate. delete The binding member according to claim 1, wherein the projecting portion of the upper cover plate has a humming shape bent inward. The coupling cover as claimed in claim 1, wherein the projecting portion of the upper cover plate is formed in a hemispherical shape corresponding to the depth of the engagement recess portion so that the projecting portion of the upper cover plate can be seated on the fastening recess portion of the fastening member, absence. The binding member according to claim 1, wherein the plate-like body includes at least one groove formed in the longitudinal direction so as to secure its own rigidity. The binding member according to claim 10, wherein the groove is formed at a depth of 1.5 to 20 times the thickness of the plate-like body. The binding member according to claim 1, wherein the plate-like body includes at least one fastening hole at each of both end portions so as to be fastened and fixed to the base plate. The binding member according to claim 1, wherein the plate-like body has a length corresponding to the length of the base plate. A plate-like binding member for interconnecting and fixing a base plate and an upper cover plate of a battery module assembly,
At least one welded portion mounted on the base plate and welded thereto;
At least one fastening recess corresponding to the fastening protrusion of the upper cover plate;
A hook groove located on the fastening indentation and capable of being hooked to the upper cover plate; And
A plate-like body having the welded portion formed at the lower portion thereof and the fastening portion formed at the upper portion thereof;
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Wherein the fastening indentation portion is formed to extend in the height direction in the plate-like main body portion so that the projecting portion of the upper cover plate can be seated while sliding in the vertical direction. A battery module assembly comprising a binding member according to any one of claims 1 to 14. A device as claimed in claim 15, comprising the battery module assembly as a power source. 17. The device of claim 16, wherein the device is an emergency power supply, a computer room power supply, a portable power supply, a medical equipment power supply, a fire extinguishing equipment power supply, an alarm facility power supply, or an evacuation facility power supply.

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