KR100836381B1 - Grommet for connecting battery module - Google Patents

Abstract

A grommet for connecting battery modules is provided to prevent a deviation of battery modules effectively, and to connect the battery modules more firmly while increasing fixability between connection parts. A grommet(100) for connecting battery modules includes: two connection parts(110,120) which are combined, form two receiving parts(111) to connect two parallel battery modules, and are integrally united by a hinge at one end parts of the two connection parts; an intermediate part of the two connection parts which is interposed between the two battery modules; and a fixation hook and a hook fastener of which each is formed on the other end parts of the both connection parts opposite to the hinge part so as to fix the connection parts in a hook coupling structure.

Description

Grommet for connecting battery module

1 is a perspective view of a conventional grommet,

Figure 2 is a perspective view of another conventional grommet,

3 and 4 are perspective views showing a state in which two battery modules are fastened by a grommet according to the present invention;

5 is a cross-sectional view of the battery modules fastened by the grommet according to the present invention loaded on the battery holder,

6 is a perspective view of a grommet according to the present invention;

7 to 10 is a detailed view showing the structure of the hinge portion between the two binding portion in the grommet according to the present invention,

11 to 13 is a detailed view showing the hook coupling structure between the middle of the two binding portion in the grommet according to the present invention,

14 to 17 is a detailed view showing the hook coupling structure between the ends of the two binding portions in the grommet according to the present invention.

<Explanation of symbols for the main parts of the drawings>

11: battery module 100: grommet

110, 120: binding portion 121: hinge portion

The present invention relates to a battery module fastening grommet, and more particularly, to a battery module fastening grommet for supporting the two battery modules constituting the battery unit so as to maintain the interval.

As is well known, an electric vehicle such as a hybrid vehicle or a fuel cell vehicle which operates an engine and an electric motor to drive a vehicle is essentially equipped with a battery unit that provides driving power of the electric motor.

The battery unit is composed of a plurality of battery modules to supply the necessary power while repeatedly charging / discharging while driving the vehicle.

In addition, in the battery unit, a grommet is used to support a plurality of battery modules while maintaining a gap therebetween. FIG. 1 is a grommet disclosed in Japanese Patent Laid-Open No. 2006-351363, which includes two cylindrical battery modules. The grommet used to bind to each other.

Referring to Fig. 1, the conventional grommet has a structure divided into two parts, and each divided holder has a structure having coupling means for engaging the divided portion (coupling portion).

Since the conventional grommet is composed of two parts separated from each other with a slight difference in structure, the number of parts and parts cost, the number of parts assembling work, assembly time and assembly cost, cost and time required for parts management, inconvenience, etc. are increased. There is a problem.

In addition, there is a disadvantage in that the fixing of the two parts coupled to each other is inferior, in particular, because the coupling between the parts only by the projection-groove coupling structure at both ends, there is a fear that grommet escape due to insufficient overall fixation.

2 is a perspective view showing another form of grommet, which is a structure in which the fixing hook 81 protrudes outwardly in the middle portion, which may adversely affect the battery module cooling air flow path, and the fixing portion after injection molding. It has the disadvantage of inferior rigidity.

In order to solve the problems described above, the present invention is directed to a hinge structure in which two binding parts which form two accommodating parts to bind two battery modules side by side in a combined state are connected to each other at a hinge structure. It is connected to each other is composed of a single part, by the hook coupling structure having excellent fastening force in each of the middle and the end of the two binding portion is configured to be fixed between the two binding portions, the separation is effectively prevented compared to the conventional, The purpose of the present invention is to provide a battery module fastening grommet that can more firmly bind the battery module as the fastening force (fastening force) between the binding parts is increased.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In order to achieve the above object, the present invention, the two binding parts to form two housing parts to bind two battery modules side by side in combination with each other is integrally connected by a hinge portion bent at one end and A fixing hook is attached to one side of the binding portion so that the middle portion of the two binding portions inserted between the two battery modules and the other ends of the two binding portions opposite to the hinge portion can be coupled by a hook coupling structure between the two binding portions. Provides a battery module fastening grommet, characterized in that the hook engaging jaw is formed in each of the binding portion.

In a preferred embodiment, the hinge portion at one end of the two binding portions is longitudinally along both lateral lines of the hinge portions at the end portions of each binding portion, so that a predetermined portion of both ends in the longitudinal direction thereof is separated from the end portions of the respective binding portions. It is characterized in that the cut is formed by the structure.

In addition, the hinge portion is characterized in that both ends of the longitudinal direction integrally connected to each binding portion is relatively thick and gradually thinner as the thickness goes toward the center of the longitudinal direction.

Also, in the middle of the two binding portions, two fixing hooks protrude inwardly from one binding portion, and each of the fixing hooks may be fastened in a state where the fixing hooks are inserted into each hole formed in the other binding portion. Hook hooking jaw is formed on the portion corresponding to the fixed hook, characterized in that the two fixed hook is fastened while being caught by the hook hooking jaw of the side inside each hole.

In addition, the hook reinforcing ribs are formed on the inner surface of each of the fixing hook protrudes.

In addition, the other end of the two binding portion, the fixed hook is formed to protrude long in the inner center of the one side binding portion, characterized in that the hook engaging jaw is formed on the corresponding portion of the fixed hook of the other binding portion.

In addition, the locking surface and the locking surface of the hook engaging jaw of the fixed hook to the mutual action is characterized in that formed in the inclined surface of the reverse tapered structure.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to a battery module fastening grommet, and more particularly, to a battery module fastening grommet for supporting the two battery modules constituting the battery unit so as to maintain the interval.

The grommet for fastening the battery module of the present invention has a structure that is fastened to each other while surrounding the outer peripheral surface of the two battery modules, as in the prior art is not one but two parts, in particular two battery modules side by side, respectively, the upper side and the lower side The hinge type is applied to one end to connect the two binding parts to one part so that the two binding parts can be rotated with each other during assembly / disassembly, so that the two binding parts to be bound by each other are maintained as one part. (Part put in the middle between two side by side battery module) and the other end is configured by applying a hook fixing method.

3 and 4 are perspective views illustrating a state in which two battery modules are fastened by the grommet according to the present invention, and FIG. 5 is a state in which the battery modules fastened by the grommet according to the present invention are mounted in the battery holder. It is a cross section.

As shown in Figure 3 and 4, the grommet 100 according to the present invention is the front end, the middle and the rear end of the battery module 11 so that the interval is maintained while binding the two battery modules 11 mutually Each of the three grommet 100 is installed to fasten the two battery modules (11).

As shown in FIG. 5, the grommet 100 which binds the two battery modules 11 with each other in the state in which the battery modules 11 are loaded in the battery holder 12 includes all the loaded in the battery holder 12. The battery module 11 serves to support and maintain the gap.

6 is a perspective view of the grommet according to the present invention, (a) shows a state before assembling between the binding parts 110 and 120, and (b) shows a state after assembling between the binding parts 110 and 120.

As shown, the grommet 100 of the present invention is composed of two binding parts (110, 120) connected to one part by a hinge portion (not shown in Figure 6) formed at one end, the entire grommet 100 In the state in which the two binding parts 110 and 120 are divided, the two circular accommodating parts 111 are formed to bind the two battery modules side by side.

In this case, the two binding parts 110 and 120 are in a form in which two ring-shaped structures are integrally connected in an assembled state as shown in (b), and the two ring-shaped structures can accommodate two battery modules side by side. The two housing parts 111 are formed.

In the present invention, the two binding parts 110 and 120 are integrally connected to each other by a hinge part formed at one end thereof, and the hinge parts are integrally connected to each other of the binding parts 110 and 120 at both sides, and are coupled to each other at the time of assembly / separation. ) Can be rotated to each other.

7 to 10 are detailed views showing the structure of the hinge portion between the two binding portions in the grommet according to the present invention, wherein the hinge portion 121, which is the connection portion between the two binding portions 110 and 120, is each binding portion 110 and 120. In one end of the coupling) is formed integrally to each of the binding unit (110, 120) to connect the binding unit (110, 120) of both sides, in particular, the hinge portion 121 is integrally connected to each of the binding unit (110, 120) as shown in FIG. Both ends in the longitudinal direction are relatively thick and gradually thinner as they go toward the center of the longitudinal direction.

This is because when the grommet 100 is opened or closed, the two binding parts 110 and 120 rotate about the hinge part 121, so that the part where the bending occurs at the hinge part 121, that is, the maximum bending occurs The central portion of the branch 121 is to ensure maximum flexibility.

For example, when the thickness of the thickest portion of the hinge portion 121 is 0.7 mm, the thickness of the thinnest portion of the central portion is 0.3 mm.

And, as shown, in both sides except the hinge portion 121 has a structure in which the two binding parts (110, 120) are separated from each other, the end sections 112, 122 separated between the two binding parts (110, 120) is a binding part ( When the 110 and 120 are opened, they are inclined to facilitate rotation, and at the same time, a minute gap (eg, 0.2 mm) exists between the end surfaces 112 and 122 of both binding portions.

In addition, the hinge portion 121 in the longitudinal direction along both side lines of the hinge portion at the end of each of the binding portion (110, 120) so as to be separated from the end of each of the binding portion (110,120) in a predetermined section at both ends of the longitudinal direction. The cutouts 113 and 123 are formed, so that the length of the hinge portion 121 sufficient for bending and hinge operation can be ensured.

On the other hand, Figures 11 to 13 attached are hooks between the middle portion (part of the middle between the two side-by-side battery modules coupled to each other between the two binding portions in the grommet 100 according to the present invention) As a detailed view showing the coupling structure, as shown in the drawing, two insertion type fixing hooks 114 protrude inwardly of one side binding portion 110, and the other side fixing portion 120 is fixed to the corresponding fixing hook portion Hook 114 is caught hook hooking jaw 125 is formed that can be fixed.

The fixing hook 114 is formed so as to protrude from the one side binding portion 110 to the inside of the middle portion is approximately parallel to each other, is inserted into each hole 124 formed in the middle portion of the other side binding portion 120 It has an insertion type hook structure that is hooked on the hook engaging jaw 125 on the inner side.

That is, when the two binding parts 110 and 120 are assembled to be in a closed state, the fixing hook 114 of the one binding part 110 is inserted into and coupled into the hole 124 of the other binding part 120. By fixing between the fixing hook 114 and the hook engaging jaw 125 is to maintain a state in which both side binding portions (110, 120) are integrally coupled.

When the two fixing hooks 114 are inserted into the corresponding holes 124 at the time of assembly, both fixing surfaces 114a and 125a, which are mutually corresponding surfaces of the fixing hooks 114 and the openings of the holes 124, come into contact with each other. The hook 114 is momentarily gathered in the middle, and when the fixed hook 114 is caught by the hook catching jaw 125, the two fixing hooks 114 are opened in their original form by elasticity, and each hook catching jaw ( 125).

As described above, in the grommet 100 according to the present invention, in the hook fixing method of the middle portion, the hook fixing jaw of the two fixing hooks 114 in the center is located on the side of the hole 124 inside the middle portion. (125), and the fixed hook 114 is inserted into the hole 124 in this way is adopted by the hook engaging jaw 125 on the side, so that the fixed and hook functionality without protruding to the outside This can be improved, which in turn has the advantage of preventing grommet deviation and improving battery module fixability.

Preferably, the two fixing hooks 114 to protrude the hook reinforcing ribs 115 on the inner side so that the fixing hook 114 is more securely fixed to the hook hooking jaw 125, the fixing property and the tightening force is lowered Should be prevented.

On the other hand, Figure 14 to 17 is a detailed view showing the hook coupling structure between the ends of the two binding portions (opposite end of the hinge portion formed in the binding portion) in the grommet according to the present invention, as shown, one side binding The hook hooking jaw which protrudes and forms the fixed hook 126 in the center of the part 120, and the fixed hook 126 is caught in the corresponding part of the said fixed hook 126 by the other side binding part 110, 116 is formed.

Here, as shown in Figure 14, at the intermediate position of the grommet end where the ends of the two binding parts (110, 120) face each other, because the thickness of the binding parts (110, 120) is thin, the hook fastening position is raised to the upper side in the drawing.

To this end, the fixed hook 126 of the lower binding unit 120 in the drawing of FIG. 15 protrudes upwards long, and hook hooking jaw at an upper position where the fixing hook 126 may be caught in the upper binding unit 110. 116 is formed so that the fixed hook 126 and the hook engaging jaw 116 can be mutually fastened at a position raised from the middle of the grommet end to the upper side in the drawing.

As a result, the position where the fixed hook 126 and the hook engaging jaw 116 are fastened to each other becomes the upper position on the drawing with a thick thickness of the one side binding portion (upper binding portion on the drawing) 110. To be done.

In addition, the unnecessary thin portion of the upper binding portion 110 in the drawing overlaps the inside of the fixing hook 126 for assembly convenience is removed.

And, preferably, the engaging surface 126a of the fixed hook 126 and the engaging surface 116a of the hook engaging jaw 116 which are coupled to each other in an opposite state are inverse to each other in order to increase the fastening force and prevent the hook detachment. Apply taper.

That is, as shown in the figure, the two locking surfaces 116a and 126a of the fixed hook 126 and the hook locking jaw 116 which engage with each other are given an inverse taper angle (about 5 °) at a predetermined angle to each other, Both sides of the locking surface (116a, 126a) is to be firmly caught on each other.

As such, when the locking surfaces 116a and 126a of the fixed hook 126 and the hook locking jaw 116 are formed as inclined surfaces to which the reverse taper structure is applied, the hook detachment can be more effectively prevented, and the fixed hook 126 and By the solid fastening between the hook engaging jaw 116 there is an effect that the grommet detachment prevention and battery module fixedness is improved.

In this way, the grommet for fastening the battery module according to the present invention is that the two binding parts are connected in a hinge structure, which is made of one part, and is fixed between the two binding parts by an improved hook coupling structure of the middle part and the end ( Fastening force) is increased as compared to the prior art it is possible to more firmly bind the battery module.

As described above, according to the grommet for fastening the battery module according to the present invention, the two binding parts which form two accommodating parts to bind two battery modules side by side in a combined state to each other at one end hinge structure. It is connected to each other is composed of a single part, by the hook coupling structure having excellent fastening force in each of the middle and the end of the two binding portion is configured to be fixed between the two binding portions, the separation is effectively prevented compared to the conventional, As the fixing (fastening force) between the binding parts is increased, there is an effect that the battery module can be more firmly bound.

In addition, by reducing the number of parts and deleting undercuts, manufacturing costs and costs such as mold costs can be reduced.

Claims (7)

In the combined state, the two binding parts which form two accommodating parts for binding two battery modules side by side are integrally connected by a hinge part bent at one end, and the middle of the two binding parts inserted between the two battery modules. On the other end of the two binding portions opposite to the hinge portion and the hinge portion, a fixed hook is formed at one binding portion and a hook engaging jaw is formed at the other binding portion so as to be coupled by a hook coupling structure between both binding portions. Battery module fastening grommet. The method according to claim 1, At one end of the two binding portions, the hinge portion is formed by longitudinal cuts formed along both side lines of the hinge portion at the end portions of the respective binding portions so that a predetermined section of both ends in the longitudinal direction thereof is separated from the end portions of the respective binding portions. Battery module fastening grommet, characterized in that the structure. The method according to claim 1 or 2, The hinge portion is a grommet for fastening the battery module, characterized in that the both ends of the longitudinal direction is integrally connected to each of the binding portion is relatively thick and gradually thinner as the thickness goes toward the center of the longitudinal direction. The method according to claim 1, In the middle portion of the two binding portions, two fixing hooks protruding inwardly formed on one side coupling portion, and fixing the inner side of each hole so that each fixing hook can be inserted into the inside of each hole formed in the other binding portion. The hook engaging jaw is formed in the hook corresponding portion, the grommet for fastening the battery module, characterized in that the two fixing hook is fastened while being caught by the hook engaging jaw on the side inside each hole. The method according to claim 4, Battery module fastening grommet, characterized in that the hook reinforcing rib protrudes on the inner surface of each of the fixed hook. The method according to claim 1, A battery module fastening grommet, characterized in that at the other end of the two binding portions, a fixed hook is formed to protrude long in the inner center of one binding portion, and a hook locking jaw is formed at the corresponding portion of the fixing hook of the other binding portion. The method according to claim 6, The locking surface of the fixing hook and the locking surface of the hook locking jaw to mutually engage the grommet for fastening the battery module, characterized in that formed in the inclined surface of the reverse tapered structure.

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