End plate for battery module

Abstract

The present invention relates to an end plate for a battery module, the end plate comprising: a first plate and a second plate that are coupled to each other; and bushing members that are arranged lengthwise vertically between both sides of the first plate and both sides of the second plate, have vertical insert holes formed therein, and are coupled and fixed to the first plate or the second plate. A mounting cover protruding forward is formed bent on both sides of the second plate, a mounting groove is formed behind the mounting cover, a coupling member integrally formed by injection is formed, protruding forward, on both sides of the first plate, the bushing members are coupled and fixed to the inside of the coupling member by insert injection, the coupling member having the bushing members inserted therein is inserted into the mounting groove, and a plurality of ring-shaped concave grooves are formed along a circumferential direction in the outer circumferential surface of the bushing members. When coupling and fixing the bushing members to the inside of the coupling member by insert injection, the bushing members are fixed to the coupling member by filling the concave grooves with an injection molding material.

Description

Endplate for battery module

[0001] The present invention relates to an end plate for a battery module, and more particularly, to an end plate for a battery module that is joined to both ends of a hollow battery case.

[0002] Recently, due to the development of alternative energy sources to address air pollution and energy depletion caused by the use of fossil fuels, demand for secondary batteries that can store generated electric energy is increasing.

[0003] Secondary batteries that can be recharged are used in everyday life, such as in mobile devices, electric vehicles, and hybrid electric vehicles.

[0004] Secondary batteries, which are used as an energy source for various electronic devices that are indispensable in modern society, are seeing an increase in the capacity required due to the increase in the use and complexity of mobile devices and the development of electric vehicles.

[0005] To meet user demands, small devices are equipped with multiple battery cells, but automobiles and the like use battery modules that electrically connect multiple battery cells, or battery packs equipped with multiple such battery modules.

[0006] In general, a battery module is composed of a case, battery cells arranged inside the case, and end plates connected to both ends of the case.

[0007] The above end plate is made of metal or synthetic resin material.

[0008] Recently, end plates with a structure in which synthetic resin and metal are mutually bonded are also being developed.

[0009] The end plate is equipped with a bushing member for inserting a separate device, jig, etc., but there was also a problem that this bushing member was separated or moved due to external force.

[0010] The present invention is intended to solve the problem, and the purpose is to provide an end plate for a battery module that can prevent the bushing member from being separated or moved due to external force by firmly fixing and connecting the bushing member to the end plate, and improve the convenience of assembly, etc.

[0011] In order to achieve the above object, the end plate for a battery module of the present invention is an end plate for a battery module that is coupled to both sides of a hollow rectangular battery case, comprising: a first plate made of an insulating synthetic resin material and formed by injection; a second plate made of a metal material and formed by bending by pressing, coupled to the front of the first plate, and welded to both sides of the battery case; A bushing member is formed by vertically extending between both sides of the first plate and both sides of the second plate, and having vertically insertion holes formed therein, and is fixedly connected to the first plate or the second plate; wherein a mounting cover protruding forward is formed by bending on both sides of the second plate, a mounting groove is formed at the rear of the mounting cover, and a connecting member integrally formed by injection is formed by protruding forward on both sides of the first plate, and the bushing member is fixedly connected inside the connecting member by insert injection, and the connecting member, in which the bushing member is insertedly disposed inside, is insertedly disposed inside the mounting groove, and a plurality of ring-shaped concave grooves are formed along the circumferential direction on the outer surface of the bushing member, and when the bushing member is fixedly connected inside the connecting member by insert injection, the injection-molded material is filled in the concave grooves to fix the bushing member to the connecting member.

[0012] A movement prevention cover is formed by bending at least one of the upper or lower portions of the above-mentioned mounting cover to cover the upper or lower portion of the bushing member mounted in the above-mentioned mounting groove, and a through hole communicating with the fitting hole is formed in the above-mentioned movement prevention cover.

[0013] The above flow prevention cover is composed of a first flow prevention cover formed on the upper part of the settling cover and a second flow prevention cover formed on the lower part of the settling cover, wherein the bushing member is arranged on the inside of the settling cover, the first flow prevention cover, and the second flow prevention cover.

[0014] The above-mentioned flow prevention cover is formed to be larger than the diameter of the above-mentioned bushing member.

[0015] A fixing hole is formed through the above-mentioned fixing cover, and a fixing projection is formed protrudingly in the above-mentioned connecting member and inserted into the fixing hole, and when the first plate and connecting member are injected, the second plate and the bushing member are fixedly connected by insert injection, and when the connecting member is formed inside the above-mentioned fixing groove, the fixing projection is formed inside the above-mentioned fixing hole and fixed, thereby fixing and connecting the first plate and the second plate.

[0016] According to the end plate for the battery module of the present invention as described above, the following effects are provided.

[0017] In the present invention, the bushing member inserted into the mounting groove can be prevented from moving in the vertical direction by the movement prevention cover, and can be prevented from being separated and detached in the horizontal direction by the mounting cover.

[0018] In addition, since the above bushing member is welded to the movement prevention cover or press-fitted into the mounting groove of the mounting cover, the above bushing member can be firmly fixed.

[0019] In addition, it can increase the convenience of assembly and manufacturing of end plates.

[0020] In addition, the bushing member can be more firmly fixed to the connecting member of the first plate made of an injection-molded material by the concave groove formed on the outer surface of the bushing member.

[0021] FIG. 1 is a perspective view of an end plate for a battery module according to a first embodiment of the present invention;

[0022] Figure 2 is a one-way exploded perspective view of an end plate for a battery module according to the first embodiment of the present invention;

[0023] Figure 3 is an exploded perspective view of an end plate for a battery module according to the first embodiment of the present invention, in another direction.

[0024] Figure 4 is a one-way exploded perspective view of an end plate for a battery module according to a second embodiment of the present invention.

[0025] Figure 5 is a one-way exploded perspective view of an end plate for a battery module according to a third embodiment of the present invention.

[0026]

[0027] First embodiment

[0028] FIG. 1 is a perspective view of an end plate for a battery module according to a first embodiment of the present invention, FIG. 2 is a one-way exploded perspective view of an end plate for a battery module according to a first embodiment of the present invention, and FIG. 3 is a different-way exploded perspective view of an end plate for a battery module according to a first embodiment of the present invention.

[0029] The end plate for the battery module of the present invention is coupled to both sides of a hollow rectangular battery case, and comprises a first plate (10), a second plate (20), and a bushing member (30), as shown in FIGS. 1 to 3.

[0030] The above first plate (10) is made of a synthetic resin material having insulating properties and is formed by injection molding.

[0031] The above second plate (20) is made of metal and is formed by bending using a press.

[0032] The above second plate (20) is coupled to the front of the above first plate (10).

[0033] That is, one side of the first plate (10) is placed facing each other on both sides of the battery case, and one side of the second plate (20) is placed on the other side of the first plate (10), so that the second plate (20) is combined in a state where it is placed in front of the first plate (10).

[0034] The joining method and joining structure of the first plate (10) and the second plate (20) can be formed in various ways and structures, such as a hook structure, heat fusion, and TOX-clinching.

[0035] The second plate (20) coupled to the first plate (10) is fixedly coupled to both sides of the battery case by welding.

[0036] The above bushing member (30) has a fitting hole formed in the upper and lower direction inside and is fixedly connected to both sides of the first plate (10) or the second plate (20).

[0037] The above fitting is equipped with a separate tool, jig, etc. to support the battery case.

[0038] In this embodiment, the bushing member (30) is arranged lengthwise in the vertical direction between both sides of the first plate (10) and both sides of the second plate (20).

[0039] On both sides of the second plate (20), a fixing cover (21) protruding forward is formed by bending.

[0040] A mounting groove (22) into which the bushing member (30) is inserted is formed at the rear of the mounting cover (21).

[0041] And, a movement prevention cover (23, 24) that covers the upper or lower part of the bushing member (30) seated in the seat groove (22) is formed by bending at least one of the upper or lower parts of the seat cover (21).

[0042] The above flow prevention cover (23, 24) has a through hole (26) formed to communicate with the fitting hole.

[0043] In this embodiment, the flow prevention cover (23, 24) is composed of a first flow prevention cover (23) formed on the upper part of the settling cover (21) and a second flow prevention cover (24) formed on the lower part of the settling cover (21).

[0044] The above bushing member (30) is placed inside the above mounting cover (21), the first flow prevention cover (23), and the second flow prevention cover (24).

[0045] The above-mentioned flow prevention cover (23, 24) is formed to be larger than the diameter of the above-mentioned bushing member (30).

[0046] The upper or lower part of the above bushing member (30) is fixed by welding to the above movement prevention cover (23, 24).

[0047] Alternatively, the bushing member (30) is pressed into the mounting groove (22) of the mounting cover (21) and fixedly connected.

[0048] The bushing member (30) inserted and placed in the above-mentioned mounting groove (22) by the above-mentioned structure can be prevented from moving in the vertical direction by the movement prevention cover (23, 24) and can be prevented from being separated and detached in the horizontal direction by the mounting cover (21).

[0049] In addition, since the bushing member (30) is welded to the movement prevention cover (23, 24) or press-fitted into the mounting groove (22) of the mounting cover (21), the bushing member (30) can be firmly fixed.

[0050]

[0051] Second embodiment

[0052] Figure 4 is a one-way exploded perspective view of an end plate for a battery module according to a second embodiment of the present invention.

[0053] The second embodiment differs from the first embodiment in that a connecting member (11) is further formed on both sides of the first plate (10).

[0054] On both sides of the first plate (10), a connecting member (11) formed integrally by injection is formed to protrude forward.

[0055] Inside the above-mentioned connecting member (11), the above-mentioned bushing member (30) is fixedly connected by insert injection.

[0056] And, the connecting member (11) with the bushing member (30) inserted and placed inside is inserted and placed inside the mounting groove (22).

[0057] In addition, a number of ring-shaped concave grooves (31) are formed along the circumferential direction on the outer surface of the bushing member (30).

[0058] When the bushing member (30) is fixedly connected to the inside of the above-mentioned connecting member (11) by insert injection, the injection-molded material is filled into the concave groove (31) to more firmly fix the bushing member (30) to the connecting member (11).

[0059] In the second embodiment, the bushing member (30) is first fixedly connected to the inside of the connecting member (11) by insert injection, and then the first plate (10) and the second plate (20) are connected using a conventionally known method and structure.

[0060] At this time, the connecting member (11) with the bushing member (30) inserted inside is inserted and placed inside the mounting groove (22).

[0061] If necessary, the bushing member (30) arranged inside the above-mentioned connecting member (11) may be additionally fixed to the movement prevention cover (23, 24) through welding or the like, as in the first embodiment.

[0062] Since other details are similar to those of the first embodiment, a detailed description thereof is omitted.

[0063]

[0064] Third embodiment

[0065] FIG. 5 is a one-way perspective view of an end plate for a battery module according to a third embodiment of the present invention.

[0066] The third embodiment is different from the first embodiment in that a connecting member (11) is further formed on both sides of the first plate (10).

[0067] On both sides of the first plate (10), a connecting member (11) formed integrally by injection is formed to protrude forward.

[0068] Inside the above-mentioned connecting member (11), the above-mentioned bushing member (30) is fixedly connected by insert injection.

[0069] And, the connecting member (11) with the bushing member (30) inserted and placed inside is inserted and placed inside the mounting groove (22).

[0070] A fixing hole (25) is formed through the above-mentioned fixing cover (21).

[0071] The above-mentioned connecting member (11) has a fixed projection (12) protruding and fixed by being inserted into the above-mentioned fixing hole (25).

[0072] When the first plate (10) and the connecting member (11) are injected, the second plate (20) and the bushing member (30) are fixedly connected together by insert injection.

[0073] At this time, the above bushing member (30) is placed in a pre-arranged state in the above mounting groove (22).

[0074] The bushing member (30) pre-positioned in the above-mentioned settling groove (22) may be fixed to the movement prevention cover (23, 24) by welding, or may be fixed to the settling cover (21) by press-fitting.

[0075] When insert injection is performed, the connecting member (11) is formed inside the fixing groove (22), and the fixing projection (12) is formed inside the fixing hole (25) and fixed, thereby fixing and connecting the first plate (10) and the second plate (20).

[0076] In addition, a number of ring-shaped concave grooves (31) are formed along the circumferential direction on the outer surface of the bushing member (30).

[0077] When the bushing member (30) is fixedly connected to the inside of the above-mentioned connecting member (11) by insert injection, the injection-molded material is filled into the concave groove (31) to more firmly fix the bushing member (30) to the connecting member (11).

[0078] Of course, as in the first embodiment, a structure that combines the first plate (10) and the second plate (20) may also be formed by injection molding, such as a conventionally known hook-joining structure.

[0079] Since other details are similar to those of the first embodiment, a detailed description thereof is omitted.

[0080]

[0081] The end plate for the battery module of the present invention is not limited to the above-described embodiment, and can be implemented by making various modifications within the scope permitted by the technical concept of the present invention.

[0082] The present invention can be applied to an end plate for a battery module and thus has industrial applicability.

Claims

1. In an end plate for a battery module that is joined to both sides of a hollow rectangular battery case, A first plate made of a synthetic resin material having insulating properties and formed by injection; A second plate made of metal, formed by bending through a press, joined to the front of the first plate, and welded to both sides of the battery case; It comprises a bushing member which is arranged vertically between both sides of the first plate and both sides of the second plate, has a vertical insertion hole formed inside, and is fixedly connected to the first plate or the second plate; On both sides of the second plate, a fixing cover protruding forward is formed by bending, A mounting groove is formed on the rear of the above mounting cover. On both sides of the first plate, a connecting member formed integrally by injection is formed to protrude forward, Inside the above-mentioned joining member, the above-mentioned bushing member is fixedly joined by insert injection. The above connecting member, in which the above bushing member is inserted and placed inside, is inserted and placed inside the above fixing groove, On the outer surface of the above bushing member, a number of ring-shaped concave grooves are formed along the circumferential direction. An end plate for a battery module, characterized in that when the bushing member is fixedly joined to the inside of the above-mentioned joining member by insert injection, the injection-molded material is filled into the concave groove to fix the bushing member to the above-mentioned joining member.

2. In claim 1, At least one of the upper or lower portions of the above-mentioned fixing cover is formed by bending a movement prevention cover that covers the upper or lower portion of the bushing member fixed in the above-mentioned fixing groove. An end plate for a battery module, characterized in that the above-mentioned flow-preventing cover has a through-hole formed therein that communicates with the fitting hole.

3. In claim 2, The above-mentioned flow-prevention cover is composed of a first flow-prevention cover formed on the upper part of the above-mentioned settling cover and a second flow-prevention cover formed on the lower part of the above-mentioned settling cover, An end plate for a battery module, characterized in that the above bushing member is arranged inside the above mounting cover, the first flow prevention cover, and the second flow prevention cover.

4. In claim 2, An end plate for a battery module, characterized in that the above-mentioned flow-preventing cover is formed to be larger than the diameter of the above-mentioned bushing member.

5. In claim 1, A fixing hole is formed through the above-mentioned fixing cover, The above-mentioned connecting member has a fixed projection formed protruding and inserted into the above-mentioned fixing hole. An end plate for a battery module, characterized in that when the first plate and the connecting member are injected, the second plate and the bushing member are fixedly connected by insert injection, and the connecting member is formed inside the fixing groove, and the fixing protrusion is formed and fixed inside the fixing hole, thereby fixing the first plate and the second plate.

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