KR102030119B1 - Battery Pressurizing Device And Battery Module Comprising The Same - Google Patents

Abstract

The present invention discloses a battery pressurizing device and a battery module including the same, which is adapted to pressurize the battery stack together with the lower plate and the upper plate in a battery assembly structure in a simple structure to continuously maintain the initial shape of the battery assembly structure. According to the present invention, there is provided a battery pressurizing device comprising: a pressurizing portion on a lower surface and both sides of a battery assembly structure; And fastening portions formed integrally with the pressing portion, the fastening portions facing on the upper surface of the battery assembly structure, the pressing portion bent at both edges below the lower surface, and the fastening portions are coupling portions of the battery assembly structure on the upper surface. It is characterized by being bound to each clip (clip) type.

Description

Battery pressurizing device and battery module including the same {Battery Pressurizing Device And Battery Module Comprising The Same}

The present invention relates to a battery pressurizing device and a battery module including the same, which are adapted to pressurize components stacked sequentially to maintain the initial shape of the components and to align the components with each other.

Recently, in order to reduce air pollution due to exhaust gas of a vehicle, a vehicle has been manufactured based on a study to secure driving force using an internal combustion engine and / or an electric motor. Accordingly, the vehicle has evolved in the order of a hybrid vehicle, a plug-in hybrid vehicle, and an electric vehicle. In this case, the hybrid vehicle and the plug-in hybrid vehicle have an internal combustion engine, an electric motor and a battery pack, and the electric vehicle has an electric motor and a battery pack without an internal combustion engine.

In addition, the battery pack has also evolved with hybrid vehicles, plug-in hybrid vehicles and electric vehicles. The battery pack is configured to be chargeable outside of the electric vehicle. The battery pack has a battery module, and the battery module has a lower plate, a battery cell structure, and an upper plate that are sequentially stacked. The lower plate and the upper plate are made of a metal member. The battery cell structure consists of battery cells that are sequentially stacked and cartridges for accommodating the battery cells.

The battery cell causes a swelling phenomenon due to the generation of gas due to the chemical reaction of the electrolyte inside during repeated charging and discharging. The swelling phenomenon increases the volume of the battery cell when viewed externally. Thus, each of the battery cells repeats an increase in volume through a swelling phenomenon in response to charging and discharging. The battery cells deform the initial shape of the cartridges. Here, the lower plate and the upper plate are screwed with the battery cell structure to impart mechanical structural rigidity to the battery cell structure, thereby suppressing expansion of the battery cell structure.

However, since the lower plate and the upper plate pressurize the battery cell structure through the corners, the lower plate and the upper plate do not sufficiently suppress the expansion of the central region in the battery cell structure. Therefore, many studies have been conducted on the coupling relationship between the lower plate, the battery cell structure and the upper plate to sufficiently suppress the expansion of the battery cell structure in consideration of the shape of the battery cell structure during repeated charging and discharging of the battery cells. It is becoming.

An example of the above studies has been disclosed in the 'cell module including a pressure bracket' of Korean Patent Laid-Open Publication No. 10-2015-0000090 (published date; January 02, 2015). The battery module has a lower plate, a battery cell structure, an upper plate, and a pressure bracket. The pressure bracket surrounds the lower plate, the battery cell structure and the upper plate which are sequentially stacked. The pressure bracket has a bracket body and a connecting body. The bracket body has free ends extending to the top plate surrounding the bottom plate and the battery cell structure.

The connecting member is screwed with the free ends of the bracket body on the top plate. In this case, the pressurizing bracket is composed of two components that require the operator's attention to the loss of the components when assembling, reducing the number of work associated with the assembly and the number of components to reduce the number of components of the operator To continue to require consideration.

The present invention was devised under the background of the prior art as described above, which presses a battery stack together with a lower plate and an upper plate in a simple structure, thereby swelling the battery cells during charging and discharging of at least one battery cell of the battery stack. The present invention provides a battery pressurizing device suitable for sufficiently suppressing expansion of a battery stack due to a phenomenon and a battery module including the same.

According to an aspect of the present invention, there is provided a battery pressurizing apparatus comprising: a pressurizing portion positioned on a lower surface and both sides of the battery assembly structure to surround an outer circumferential surface of the battery assembly structure; And fastening portions formed integrally with the pressing portion and facing each other on an upper surface of the battery assembly structure, wherein the pressing portion is curved in a concave shape to form a step with a central region at both edges below the lower surface. The convex shape is curved in the central region, and the fastening portions are each bound to the coupling portions of the battery assembly structure in a clip type on the upper surface.

Here, the pressing portion may be formed in a band shape, and may include a pulling stand and a support stand on the lower surface, and a pressing stand on each of the two side surfaces.

Preferably, the tow bar may have the concave shape.

In one aspect, the pedestal may have the convex shape.

In another aspect, the tow bar may have a length smaller than the support bar in the longitudinal direction of the pressing portion.

In another aspect, the tow bar may have a smaller width than the support bar in a direction perpendicular to the longitudinal direction of the pressing portion.

In another aspect, the pressing stand is flat, and may have the same width as the towing stand and a smaller width than the support stand in a direction perpendicular to the longitudinal direction of the pressing portion.

On the other hand, each of the fastening portions has a substantially inverted 'MA' shape, and includes a seating stand, a contacting stand and a pressing stand which are sequentially positioned on the upper surface, wherein the seating stand and the contacting stand are located below the coupling part. It can be compressed by the coupling portion.

Preferably, the seating stand may protrude from the pressing portion toward the upper surface in parallel with the upper surface.

In one aspect, the contacting stand may be bent from an end of the seating stand on the opposite side of the pressing portion and inclined obliquely with respect to the seating stand.

In another aspect, the contact table includes a binding hole in the central region and a binding member that partially covers the binding hole, wherein the binding member is raised obliquely from the edge of the binding hole toward the central region and inserted into the through hole of the coupling portion. And can be clipped.

In another aspect, the presser stand may be bent from the end of the contacting stand near the pressing portion and positioned at right angles to the seating post.

According to an aspect of the present invention, there is provided a battery module including a lower plate, a battery stack, and an upper plate stacked sequentially; And a battery pressurizing device surrounding the lower plate, the battery stack, and the upper plate and having opposite ends on the upper plate, wherein each of the lower plate and the upper plate has the battery at both edges. Convexly curved toward the opposite side of the stack, the cell pressurizing device mates to convex bends of the bottom plate and the top plate on a binding lane of the bottom plate, the cell stack and the top plate. And are clipped to the engaging portions of the upper plate through the ends, respectively.

Here, the lower plate is defined by lower ridge ends respectively positioned at both edges and a lower surface opposite the battery stack along the binding lane to intersect the lower ridge ends. It may have a lower groove.

Preferably, the lower ridge end has a lower step in the lower groove than the lower groove periphery and may protrude convexly toward the cell pressurizing device.

According to the invention, the battery stack comprises a housing, battery cells sequentially stacked on the housing and cartridges for accommodating the battery cells, each groove being located at both sides along the binding lane in the housing. You can have

According to the invention, the top plate is located at both edges, respectively, and protrudes from the both edges toward the central region along the binding lane at the upper surface opposite the cell stack, the binding lane It may have upper ridge ends that respectively define the upper grooves corresponding to.

Preferably, the upper ridge end has a lower step in the upper groove than the upper groove periphery and may protrude convexly toward the cell pressurizing device.

According to the invention, the engagement portion may comprise a crimping stand fixed on the upper ridge end, and a stopper formed integrally with the crimping stand and positioned perpendicular to the crimping stand.

Preferably, the crimping band may have a through hole positioned on the upper groove and compressing an end portion of the battery pressing device inserted into the upper groove and inserting and clipping a portion of the end portion.

In one aspect, the crimping stand and the stopper define a clip release hole in the bent portion, the stopper pushes the end of the cell pressing device into the upper groove or through the clip release hole the cell from the upper groove. It may be a buffer that sufficiently transfers an external force to the cell pressurizing device to separate the end of the pressurizing device.

In another aspect, the lower plate has lower ridge ends respectively positioned at both edges on the binding lane, and the upper plate has upper ridge ends respectively positioned at both edges on the binding lane, The lower ridge end may have a smaller extension length along the binding lane than the upper ridge end.

In the present invention, the battery pressing device is a pressing portion surrounding the lower plate, the battery stack and the upper plate in a 'U' shape, and integrally formed with the pressing portion to the coupling portions of the upper plate, respectively It may include fastening portions to be clipped.

Preferably, the pressing portion may have both edges at a lower level than the central region in the lower plate.

In one aspect, the fastening portion includes a stabilizer, a contact and a pusher that are sequentially stacked to form an approximately inverted 'MA' shape, by placing the stabilizer and the contactor under the compression of the coupling portion to The engaging member of the contact stage can be inserted into the through hole of the compression zone of the engaging portion.

The battery pressurizing device according to the present invention can be made in a single structure to reduce the manufacturing cost of the battery module without requiring the operator's attention to parts loss during assembly of the lower plate, the battery stack and the upper plate to constitute the battery module. have.

The battery pressurizing device according to the present invention is clip-coupled with the coupling structure of the upper plate to pressurize the battery stack through the lower plate and the upper plate, so that the battery stacks during repeated charging and discharging of at least one battery cell of the battery stack. The expansion of the sieve can be sufficiently suppressed.

The battery module according to the present invention is provided by easily assembling the lower plate, the battery stack and the upper plate when viewed externally using a battery pressurizing device having a single structure and sufficiently suppresses the expansion of the battery stack when viewed internally. The electrical characteristics can be kept constant during the service life of the battery stack.

The following drawings appended hereto illustrate one embodiment of the present invention, and together with the following description serve to further understand the spirit of the present invention, the present invention is limited only to those described in such drawings. It should not be interpreted.
1 is an exploded perspective view partially showing a battery module according to an embodiment of the present invention.
FIG. 2 is an enlarged perspective view showing in detail an enlarged battery pressurizing device of FIG. 1. FIG.
3 is an enlarged perspective view of the fastening part of FIG. 2 in detail.
4 is a perspective view partially showing an enlarged side of the battery assembly structure of FIG.
FIG. 5 is a perspective view showing in detail an enlarged coupling part of the upper plate of FIG. 1. FIG.
FIG. 6 is a side view illustrating the battery module after combining the battery assembly structure and the battery pressurizing apparatus of FIG. 1.
7 is a cross-sectional perspective view showing in detail the coupling relationship between the fastening portion and the coupling portion of FIG.
8 to 11 are schematic diagrams illustrating a method of manufacturing a battery module along the cutting line I ′ I ′ of FIG. 1.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own applications. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one embodiment of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them in the present invention point of view. It should be understood that there may be variations and examples.

In the embodiments described below, the battery cell refers to a lithium secondary battery. Here, the lithium secondary battery is a generic term for a secondary battery in which lithium ions act as operating ions during charging and discharging to induce an electrochemical reaction in the positive electrode and the negative electrode. However, it is apparent that the present invention is not limited to the type of battery.

1 is an exploded perspective view partially showing a battery module according to an embodiment of the present invention.

Referring to FIG. 1, a battery module 100 according to the present invention includes a battery pressurizing device 30 and a battery assembly structure 95. The battery pressurizing device 30 may be aligned with the outer circumferential surface of the battery assembly structure 95. Preferably, the battery pressurizing device 30 may be aligned with the binding lane 55 of the battery assembly structure 95. In one aspect, the battery press device 30 is made of a metal member of the approximately 'U' shape.

The battery assembly structure 95 includes a lower plate 40, a battery stack 60, and an upper plate 90. The lower plate 40 has lower raised ends 40b respectively positioned at both edges of the lower surface 40a. Preferably, the lower raised ends 40b face away from the lower face 40a. In one aspect, the lower plate 40 is made of a metal member.

The battery stack 60 is positioned between the lower plate 40 and the upper plate 90. Preferably, as illustrated in FIG. 8, the battery stack 60 includes a housing 51, battery cells 52 sequentially stacked on the housing 51, and a cartridge accommodating the battery cells 52. (53). The upper plate 90 has upper ridge ends 78 respectively positioned at both edges of the upper surface 74. Preferably, the upper ridge ends 78 face in the upper plate 90.

In one aspect, the upper plate 90 is made of a metal member. The upper plate 90 has coupling portions 89 on the upper ridge ends 78. Preferably, the coupling portions 89 may be clipped to the free ends of the battery pressing device 30. On the other hand, the lower plate 40 and the upper plate 90 surrounds the battery stack 60 in a sand position structure to impart mechanical structural rigidity to the battery stack 60.

Here, the binding lane 55 is defined as a groove shape in the lower plate 40, the battery stack 60, and the upper plate 90. The binding lane 55 intersects the lower raised ends 40b of the lower plate 40 and is surrounded by the upper raised ends 78 of the upper plate 90.

FIG. 2 is an enlarged perspective view showing in detail an enlarged battery pressurizing device of FIG. 1. FIG.

Referring to FIG. 2, in the battery module 100, the battery pressurizing device 30 may include a pressurizing part 10 and a fastening part 20 that are integrally formed. The pressing unit 10 may be formed in a band shape and may be positioned on the lower surface 40a and both side surfaces 60a of the battery assembly structure 95 of FIG. 1. Preferably, the pressing portion 10 is bent in a concave shape under the lower surface 40a of the battery assembly structure 95 so as to form a step with the central region at both edges and convex in the central region. Lose.

In more detail, the pressurizing portion 10 includes a support base 4 and a pull base 6 positioned on the lower surface 40a of the battery assembly structure 95, and a battery assembly structure ( 95 and press bars 8, respectively, located on both sides 60a. Here, the support base 4 is located in the central region on the lower side of the pressing portion 10 has a convex shape. The tow bars 6 are respectively located at both edges at the lower side of the pressing portion 10 and have a concave shape.

Preferably, the pull bar 6 has a smaller length than the support bar 4 in the longitudinal direction of the pressing section 10. In one aspect, the towing base 6 has a smaller width than the backing base 4 in a direction perpendicular to the longitudinal direction of the pressing portion 10. Thus, the pressing portion 10 can be obtained from the support base 4 to the elastic restoring force against the deformation of the pull base 4 through the difference in size and shape of the support base 4 and the towing base (6). .

The pressing stand 8 protrudes flat from the pull stand 6 and is elastically supported from the support stand 4 and the pull stand 6. Preferably. The pressing stand 8 has a width smaller than the supporting stand 4 and the same width as the towing stand 6 in a direction perpendicular to the longitudinal direction of the pressing section 10. Meanwhile, the fastening portions 20 may be positioned to face each other on the battery assembly structure 95 in FIG. 1, for example, the upper surface 74 of the upper plate 90 of FIG. 1.

Here, the fastening portions 20 may be respectively bound to the coupling portions 89 of FIG. 1 in a clip type on the upper surface 74 of the upper plate 90.

3 is an enlarged perspective view of the fastening part of FIG. 2 in detail.

Referring to FIG. 3, in the battery pressurizing device 30, each of the fastening portions 20 has an approximately 'MA' shape in Japanese, and the upper surface of the upper plate 90 of FIG. 1 ( 74 includes a seating stand 11, a contacting stand 13 and a pressing stand 19, which are sequentially positioned on 74. Preferably, the seating base 11 protrudes from the pressing portion 10 in parallel with the upper surface 74 toward the upper surface 74 of the upper plate 90.

The contact stand 13 is bent from the end of the seating stand 11 on the opposite side of the pressing section 10, for example the presser stand 8, at an angle with respect to the seating stand 11 at an angle θ. Incline The contact table 13 includes a binding member 15 in the central region that partially covers the binding hole 15 and the binding hole 15.

Preferably, the binding member 17 is inclined upwardly from the edge of the binding hole 15 toward the central region to the through hole 81 of FIG. 5 or 7 at the engaging portion 89 of the upper plate 90. Can be inserted and clipped Here, as shown in FIG. 7, the seating stand 11 and the contacting stand 13 may be compressed by the joining portion 89 under the joining portion 89 of the upper plate 90.

The pressing stand 19 is bent from the end of the contacting stand 13 near the pressing portion 10, for example the pressing stand 8, and is positioned at right angles to the seating stand 11. Preferably, the pressing stand 19 is adapted to directly move an external force to move the pressing stand 8, the seating stand 11 and the contacting stand 13 from the edge of the upper plate 90 toward the central region. Can be.

4 is a perspective view partially showing an enlarged side of the battery assembly structure of FIG.

Referring to FIG. 4, in the battery assembly structure 95, the lower plate 40, the battery stack 60, and the upper plate 90 define a binding lane 55. The bottom plate 40 is convexly curved toward the opposite side of the cell stack 60 through the lower ridge ends 40b at both edges, as shown in FIG. 1.

Preferably, the lower plate 40 is defined by a lower surface (40a of FIG. 1) opposite the battery stack 60 along the binding lane 55 and intersects the lower raised ends 40b. It has a groove 55a. The lower groove 55a is located on the binding lane 55. In one aspect, the lower raised end 40b has a lower step in the lower groove 55a than around the lower groove 55a.

The battery stack 60 has a central groove 55b located on the side surface 60a along the binding lane 55 in the housing 51. Here, the housing 51 accommodates the battery cells 52 and the cartridges 53, as shown in FIG. The top plate 90 is convexly curved toward the opposite side of the cell stack 60 through the upper ridge ends 78 at both edges, as shown in FIG. 1.

Preferably, the upper ridge end 78 defines an upper groove 55c corresponding to the binding lane 55 at the upper surface (74 in FIG. 1) opposite the battery stack 60. In one aspect, the upper ridge end 78 has a lower step in the upper groove 55c than around the upper groove 55c.

FIG. 5 is a perspective view showing in detail an enlarged coupling part of the upper plate of FIG. 1. FIG.

Referring to FIG. 5, the upper plate 90 includes an upper ridge end 78 and an engaging portion 89 on the upper surface 74. The upper face 74 is located opposite the cell stack 60 of FIG. 4. The upper ridge end 78 is positioned along the edge of the upper face 74 and protrudes from the upper face 74 and is centered from the edge along the binding lane 55, for example the upper groove 55c. Protrudes toward you.

The engaging portion 89 is a crimping stand 83 fixed on the upper ridge end 78 and a stopper 87 formed integrally with the crimping stand 83 and positioned perpendicular to the crimping stand 83. It includes. The crimp stand 83 is positioned on the upper groove 55c and surrounds the upper groove 55c with the upper ridge end 78. Preferably, the crimp zone 83 is located at a higher level just above the upper groove 55c than around the upper groove 55c.

The pressing stand 83 has a through hole 81 on the upper groove 55c. The stop band 97 is located on the compression stand 83. Here, the pressing stand 83 and the stop stand 87 define a clip release hole 85 at the bent portion on the upper groove 55c.

FIG. 6 is a side view illustrating the battery module after combining the battery assembly structure and the battery pressurizing apparatus of FIG. 1.

Referring to FIG. 6, the battery pressing device 30 is located on the outer circumferential surface of the battery assembly structure 95. More specifically, the battery pressurizing device 30 is located on the binding lane 55 of the lower plate 40, the battery stack 60 and the upper plate 90. Preferably, the battery pressurizing device 30 is located in the lower groove 55a of the lower plate 40, the middle groove 55b of the battery stack 60 and the upper groove 55c of the upper plate 90. .

The battery pressurizing device 30 is matched to the convex curves of the lower plate 40 and the upper plate 90. That is, the battery pressurizing device 30 accommodates the lower ridge end 40b of the lower plate 40 through the towing table 6 of the pressurizing portion 10 along the binding lane 55 and pressurizes the pressurizing portion. It is in close contact with the housing 51 of the battery stack 60 through the pressure zone 8 of the 10, and pressed to the engaging portion 89 of the upper plate 90 through the fastening portion 20 to the upper plate ( In contact with the upper ridge end 78 of 90).

7 is a cross-sectional perspective view showing in detail the coupling relationship between the fastening portion and the coupling portion of FIG.

Referring to FIG. 7, the battery pressing device 30 is clipped to the coupling portions 89 of the upper plate 90 through the coupling portion 20. More specifically, the crimping stand 83 of the engaging portion 89 is a seating stand 11 and a contacting stand 11 of the fastening portion 20 inserted into the upper groove 55c on the upper groove 55c. Is pressed and the binding member 17 of the contact base 13 is inserted and clipped through the through hole 81.

Here, the seating stand 11 is in close contact with the bottom of the upper groove 55c, for example, the upper ridge end 78. The seating stand 11 and the contacting stand 13 may have a first elasticity in the upper groove 55c. The binding member 17 hangs at the edge of the binding hole 15 of the contact table 13 and partially covers the binding hole 15 and is raised from the contact table 13 so that it is second to the contact table 13. It may have elasticity.

Thus, the contacting stand 13 fits the pressing stand 83 into the step between the binding member 17 and the pressing stand 19 via the first and second elastics, and the pressing stand through the binding member 17. It is inserted and clipped into the through hole 81 of 83. The pressing stand 19 is inserted into the clip release hole 85 between the pressing stand 83 and the support 87 through the clip of the binding member 17 in the through hole 81 of the pressing stand 83.

8 to 11 are schematic diagrams illustrating a method of manufacturing a battery module along the cutting line I ′ I ′ of FIG. 1.

Referring to FIG. 8, the lower plate 40 may be prepared. The lower play 40 has lower raised ends 40b positioned respectively at both edges and defines a lower groove 55a. Subsequently, the battery stack 60 may be disposed on the lower plate 40. The battery stack 60 includes a housing 51, battery cells 52 sequentially stacked on the housing 51, and cartridges 53 accommodating the battery cells 52.

Here, the housing 51 surrounds the battery cells 52 and the cartridge 53. The housing 51 may impart mechanical structural rigidity to the battery cells 52 and / or cartridges 53. The battery stack 60 also defines a middle groove 55b. Next, an upper plate 90 may be disposed on the battery stack 60. The upper plate 90 has upper ridge ends 78 positioned respectively at both edges and defines an upper groove 55c through the upper ridge ends 78.

The top plate 90 has coupling portions 89 respectively positioned on the upper ridge ends 78. Preferably, the lower raised end 40b has a smaller extension length along the binding lane 55 than the upper raised end 78. Here, the lower plate 40, the battery stack 60 and the upper plate 90 may constitute a battery assembly structure (95).

Referring to FIG. 9, after the top plate 90 is disposed on the battery stack 60, the battery press device 30 may be prepared. The battery pressurizing device 30 has a pressurizing part 10 and fastening parts 20 as shown in FIGS. 2 and 3. The battery pressing device 30 may be fitted to the battery assembly structure 95 of FIG. 8 through the pressing portion 10 and the fastening portions 20.

While the battery pressurizing device 30 is fitted to the battery assembly structure 95, the pressurizing unit 10 takes an initial shape in consideration of the shape of the battery pressurizing device 30 and the battery assembly structure 95 (FIG. 1 or FIG. 1). 2). Subsequently, the pressing units 8 of the pressing unit 10 are applied to the restoring force through the supporting base 4 and the towing stage 6 to move toward the middle groove 55b of the battery assembly structure 95 to bind. May be in contact with lane 55.

Next, the fastening part 20 may be moved along a predetermined direction D as shown in the drawing by receiving an external force F through the pressing bar 19. Preferably, the fastening portion 20 can move through the external force F between the upper ridge end 78 of the upper plate 90 and the crimp 83, for example toward the upper groove 55c. .

Referring to FIG. 10, while the fastening portion 20 is continuously applied with an external force F, the seating base 11 and the contacting base 13 of the fastening portion 20 are connected to the upper plate 90. It may be inserted between the upper ridge end 78 and the compaction stand 83 and compressed by the compaction stand 83.

The contact table 13 is inserted into the through hole 81 of the pressing table 83 using the binding member 17, and the pressing table 83 is attached to the binding member 17 around the through hole 81. Is inserted between and the presser base 19. Here, the pressing stand 19 is inserted into the clip release hole 85 between the pressing stand 83 and the stop stand 87. Through this, the fastening part 20 may be seated in the upper groove 55c through the mounting stand 11.

Meanwhile, the stopper 87 pushes the fastening portion 20 of the battery pressing device 30 into the upper groove 55c or the battery pressing device 30 from the upper groove 55c through the clip release hole 85. It may be a buffer for sufficiently transmitting the external force (F) to the battery press device 30 to separate the fastening portion 20 of the).

Referring to FIG. 11, after the battery pressurizing device 30 is clipped to the engaging portion 89 of the upper plate 90, the lower raised ends 40b and the upper plate 90 of the lower plate 40. The upper ridge ends 78 of can be matched to the battery press device 30. More specifically, the lower raised ends 40b may be convexly projected toward the towing bases 6 of the battery press device 30 and accommodated in the towing bases 6, respectively.

In addition, the upper ridge ends 78 may protrude convexly toward the seating base 11 of the battery pressing device 30 and may be in close contact with the seating base 11. Through this, the battery press device 30 may configure the battery module 100 together with the lower plate 40, the battery stack 60 and the upper plate 90.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

30; A battery pressurizing device, 40; Bottom plate
40a; bottom face, 40b; bottom ridge stage
55; Binding lane, 60; Battery stack
60a; Side, 74; Upper side
78; Upper ridge stage, 89; Combine wealth
90; Top plate, 95; Battery assembly structure
100; Battery module.

Claims (25)

A battery surrounding the outer circumferential surface of the cell assembly structure, the battery having a lower plate, a battery stack and an upper plate sequentially stacked, and end portions facing the lower plate, the battery stack and the upper plate and facing on the upper plate; In the pressurization device,
A pressing unit positioned on both bottom surfaces and side surfaces of the battery assembly structure; And
It is made integral with the pressing portion, and includes fastening portions facing on the upper surface of the battery assembly structure,
The pressing portion is bent in a concave shape to form a step with the central region at both edges below the lower surface and bent in a convex shape in the central region,
The cell pressurizing device is matched to the convex bends of the lower plate and the upper plate on a binding lane of the lower plate, the battery stack and the upper plate, and joins the upper plate through the ends. Clipped to each of the parts,
The fastening portions are respectively bound to the coupling portions of the battery assembly structure in a clip type on the upper surface,
The fastening parts,
A seating table bent to protrude parallel to the upper surface from the pressing portion toward the upper surface;
A contact table that is bent from an end of the seating stand and is inclined at an angle with respect to the seating stand and extends opposite to the seating stand; And
Including a push stand that is bent from an end of the contact stand and positioned at a right angle to the seating stand.
Bent at least three times from the pressing portion,
The fastening portions are elastically bound to the coupling portions, the elastic bias portion of the fastening portions is contacted on the upper surface,
The upper surface portion adjacent to the pressing stand of the contact stand,
Are exposed out of the coupling portions to enable downward pressurization from the outside to the coupling portions for detachment of the coupling portions,
The coupling part includes a crimping stand fixed on the upper ridge end of the upper plate, and a stopper formed integrally with the crimping stand and positioned perpendicular to the crimping stand,
The pressing table is located on the upper groove corresponding to the binding lane and pressurizing the battery characterized in that it has a through hole for pressing the end of the battery pressing device inserted into the upper groove and inserting and clipping a portion of the end Device. The method of claim 1,
The pressurizing portion is formed in a band shape, the battery pressing device, characterized in that it comprises a puller and the supporter on the lower surface, and the presser on each of the two sides. The method of claim 2,
And the towing table has the concave shape. The method of claim 2,
The support base is a battery pressing device, characterized in that the convex shape. The method of claim 2,
The towing table is a battery pressing device, characterized in that having a length smaller than the base in the longitudinal direction of the pressing portion. The method of claim 2,
And the towing table has a smaller width than the support table in a direction perpendicular to the longitudinal direction of the pressing section. The method of claim 2,
The pressing device is flat, the battery pressing device characterized in that it has the same width as the towing and the smaller width than the support in the direction perpendicular to the longitudinal direction of the pressing portion. The method of claim 1,
Each of the fastening portions has an inverted 'マ' shape,
And the seating zone and the contacting zone are pressed by the coupling portion under the coupling portion. delete delete The method of claim 1,
The contact stage includes a binding hole and a binding member partially covering the binding hole in a central region,
And the binding member is inclined upwardly from the edge of the binding hole toward the center region to be inserted and clipped into the through hole of the coupling portion. delete A lower plate, a battery stack and an upper plate which are sequentially stacked; And
A battery pressurizing device surrounding said lower plate, said battery stack and said upper plate and having opposite ends on said upper plate,
Each of the lower plate and the upper plate is convexly curved at opposite edges of the cell stack,
The cell pressurizing device is matched to the convex bends of the lower plate and the upper plate on a binding lane of the lower plate, the battery stack and the upper plate, and joins the upper plate through the ends. Clipped to each of the parts,
The battery pressurizing device,
A pressing part surrounding the lower plate, the battery stack, and the upper plate; And
It is made integral with the pressing portion, and includes fastening portions facing on the upper surface of the upper plate,
The fastening parts,
A seating table bent to protrude parallel to the upper surface from the pressing portion toward the upper surface;
A contact table that is bent from an end of the seating stand and is inclined at an angle with respect to the seating stand and extends opposite to the seating stand; And
Including a push stand that is bent from an end of the contact stand and positioned at a right angle to the seating stand.
Bent at least three times from the pressing portion,
The fastening portions are elastically fastened to the engaging portions, and the elastic bias portion of the fastening portions is contacted on the upper surface of the upper plate,
The upper surface portion adjacent to the pressing stand of the contact stand,
Are exposed out of the coupling portions to enable downward pressurization from the outside to the coupling portions for detachment of the coupling portions,
The engaging portion includes a crimping stand fixed on the upper ridge end of the upper plate, and a stopper formed integrally with the crimping stand and positioned perpendicular to the crimping stand,
The crimping stand is positioned on an upper groove corresponding to the binding lane and has a through hole for pressing an end of the battery pressing device inserted into the upper groove and inserting and clipping a portion of the end. . The method of claim 13,
The lower plate is defined by lower ridge ends respectively positioned at both edges and a lower groove defined by a lower surface opposite the battery stack along the binding lane and intersecting the lower ridge ends. Battery module characterized in that it has a. The method of claim 14,
The lower raised end has a lower step in the lower groove than the lower groove periphery and protrudes convexly toward the battery pressurizing device. The method of claim 13,
The battery stack includes a housing, battery cells sequentially stacked on the housing, and cartridges for accommodating the battery cells, wherein the battery stack has central grooves positioned on both sides of the housing along the binding lane. Battery module. The method of claim 13,
The top plate is positioned at both edges, respectively, and protrudes from the both edges toward the central region along the binding lane at the upper surface opposite the cell stack, the upper groove corresponding to the binding lane. And the upper ridge ends defining respective ones. The method of claim 17,
And wherein the upper ridge end has a lower step in the upper groove than the upper groove periphery and protrudes convexly toward the battery pressurizing device. delete delete The method of claim 13,
The crimping band and the stopping band define a clip release hole at the bent portion,
The stopper is a buffer that sufficiently transfers an external force to the battery pressurizing device to push the end of the battery pressurizing device into the upper groove or to separate the end of the battery pressurizing device from the upper groove through the clip release hole. Battery module characterized in that. The method of claim 13,
The lower plate has lower ridge ends respectively positioned at both edges of the binding lane,
The upper plate has upper ridge ends respectively positioned at both edges on the binding lane,
And wherein the lower ridge end has a smaller extension length along the binding lane than the upper ridge end. delete The method of claim 13,
And the pressing portion has both edges at a level lower than a central region in the lower plate. The method of claim 13,
The fastening part has an inverted 'MA' shape, and the seating table and the contact table are positioned below the compression section of the coupling section to insert the coupling member of the contact section into the through hole of the compression section of the coupling section. Battery module.

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