KR20230097415A - Terminal Cover Housing Integrated Type Battery Module - Google Patents

Abstract

The terminal cover integrated battery module (1) of the present invention has housing terminals in the cover space (10) formed in the externally exposed terminal connection portion (7a) of the battery housing (6) surrounding the cell unit (3) having the cell output terminal (4). By combining the cover (1-1) in a detachable/mountable manner, the battery housing (6) and the integrated terminal cover structure allow easy external recognition of the terminal part, which is a risk factor, along with operator attention and additional personnel/time required when applying a disposable terminal cover It is possible to secure product price competitiveness by reducing input / facility / cost, and in particular, simplification of the shape of the counterpart used for electrical connection between battery modules (1) through the terminal cover structure increases workability and housing terminal cover (1-1) By being elastically supported by the spring 30, it has a feature that secures quality competitiveness by maintaining torque/strengthening stability of hardware assembly.

Description

Terminal Cover Housing Integrated Type Battery Module {Terminal Cover Housing Integrated Type Battery Module}

The present invention relates to a battery module, and more particularly, to a battery module integrated with a terminal cover housing, in which a terminal short circuit is prevented by using a structure in which a battery housing covers terminals, thereby eliminating all disadvantages associated with the application of a disposable terminal cover.

In recent years, as the market for electric vehicles has grown, it is essential to verify batteries with different levels of verification according to UN laws and different means of transportation, unlike existing automobile parts.

In particular, the battery is required to prevent product damage that may occur during transportation. This is because the small battery module has a structure in which terminal parts are exposed to the outside to simplify the assembly process.

For example, the battery is transported by box packaging with a separate cover or an individual module.

In this way, the battery is transported by covering terminals exposed to the outside by box packaging, thereby preventing short circuit risk that may occur due to a closed circuit configuration due to unexpected circumstances (eg, tools, keys, careless handling) when terminals are exposed.

In addition, the covering of the terminal part prevents the risk of fire caused by sparks in surrounding materials, including damage to the product after a short circuit of the terminal part occurs.

Domestic Patent Publication KR 10-2021-0135786 A

The cover covering the terminal part has several problems because it is separately manufactured as a disposable terminal cover, which is a separate part from the battery, and assembled to the battery.

For example, from the manufacturer side, the disposable terminal cover must be manufactured/supplyed at all times, and personnel/time/facility/cost are unavoidable in order to assemble the cover to the battery module. Workers' attention is also required.

Moreover, since the disposable terminal cover is detached and discarded after transportation, the manufacturer inevitably loses costs.

On the other hand, when the disposable terminal cover is not used, the battery module has a disadvantage in that it is not applicable because individual packaging of each battery module is required for transportation.

Therefore, in view of the above, the present invention provides a structure for covering terminals to prevent terminal shorting during transportation or work by using a battery housing, thereby facilitating external recognition of terminals, which are a risk factor, and requiring operator attention when applying disposable terminal covers. And it is possible to secure product price competitiveness by reducing additional personnel/time/facility/cost input, and in particular, it is possible to increase workability and maintain torque of hardware assembly by simplifying the shape of the counterpart used for electrical connection between battery modules through the shielding structure of the terminal part. The purpose is to provide a terminal cover housing integrated battery module that can secure quality competitiveness by enhancing stability.

The battery module of the present invention for achieving the above object includes a housing terminal cover that is detachable/attached to the externally exposed terminal connection part of the battery housing surrounding the cell unit, and the housing terminal cover is in the cover space of the terminal connection part. A spring forming a spaced distance, a lifter coupled to the assembly groove of the terminal connection part to cover the cover space, and elastically supported by the spring, and a lifter coupled to the lifter space of the lifter, and a cell output end of the cell unit and a current structure It is characterized in that it is composed of an inter bus bar forming a.

As a preferred embodiment, the cover space is formed in a “c” shape in which the assembly groove is formed, the spring is fixed to the inner wall surface of the “c” shape, and the covering body of the lifter covers the cover space In , the fixed flange of the lifter is positioned as the “c”-shaped one-side opening.

As a preferred embodiment, the spring is composed of a plurality.

As a preferred embodiment, the assembly groove is composed of a side fixing groove and a vertical positioning groove, and the side fixing groove and the vertical positioning groove are formed as straight slots.

As a preferred embodiment, in the lifter, the covering body is positionally constrained to the vertical positioning groove of the assembly groove, and the fixing flange is inserted into and fixed to the side fixing groove of the assembly groove.

As a preferred embodiment, the fixing flange is formed of a bending structure of a deformable part and a fixing part, and the deformable part extends from the side of the covering body to cover the “c”-shaped one-side opening, and the fixing part At the end, it is fitted into the side fixing groove of the assembly groove.

As a preferred embodiment, the deformable part forms a bending groove, and the bending groove acts to fold the deformable part to which an external force is applied.

As a preferred embodiment, the lifter forms the lifter space in the covering body, the inter bus bar is made of a bus bar body coupled to the lifter space, and a hole and a stopper are formed in the bus bar body, The stopper is formed by having a stepped structure on one side of the bus bar body.

In a preferred embodiment, the battery housing includes an upper battery housing enclosing an upper portion of the cell unit and a lower battery housing enclosing a lower portion of the cell unit, the upper battery housing forming the terminal connection part, and the terminal connection part It protrudes from the upper battery housing.

The battery module of the present invention implements the following actions and effects in terms of assembly.

First, the battery housing is utilized as a terminal cover housing integrated structure, so it is possible to protect the battery terminals required during transportation or work without using a disposable terminal cover. can perceive Second, the battery module itself by the housing-integrated terminal cover does not require the development and assembly of a separate cover to prevent a short circuit, so it is possible to secure the price competitiveness of the battery module, unlike the existing method that required cover development/manufacturing cost, work man-hours, and facility setting. In particular, since there is no separate cover applied to the housing, the workability of the counterpart is also secured, so excessive operator attention is not required.

In addition, the battery module of the present invention implements the following actions and effects in terms of use.

First, by additionally applying a spring and a bending guide structure capable of securing/maintaining a simple separation distance and generating thrust by restoring force to the housing-integrated terminal cover, the torque holding power when fastening hardware is improved, and in particular, short circuit prevention when removing the housing-integrated terminal cover after transportation It is possible to secure price competitiveness by restoring the structure and maintaining the effect after A/S. Second, an assembly for series/parallel connection between battery modules is unnecessary due to the electrical connection structure of the common busbars tailored to the system specifications. Third, it is possible to use only one type of serial/parallel bus bar regardless of the number of connected battery modules, so there is no need for customizing to develop a customized cover for each specification, and in particular, customer requirements for each system specification are satisfied with a simple configuration. It can be.

1 is a configuration diagram of a terminal cover housing integrated battery module according to the present invention, FIG. 2 is an assembly and disassembly configuration diagram of a housing terminal cover according to the present invention, and FIG. 3 is a state in which the housing terminal cover according to the present invention covers the terminals This is an example of switching from to the terminal use state.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying exemplary drawings, and since these embodiments can be implemented in various different forms by those skilled in the art as an example, the description herein It is not limited to the example of

1 and 2 illustrate a battery module 1 to which a housing terminal cover 1-1 is applied.

Referring to FIG. 1 , the battery module 1 includes a housing terminal cover 1 - 1 externally exposed to the battery housing 6 surrounding the cell unit 3 .

For example, the battery housing 6 is composed of an upper battery housing 7 surrounding the upper part of the cell unit 3 and a lower battery housing 8 surrounding the lower part, and the cell unit 3 ) is composed of a structure that encloses the

In particular, in the cell unit 3, the cell output terminal 4, which is the output unit of the battery cells, is attached/welded with a copper and aluminum bus bar (BUSBAR) to transmit power, and the upper battery housing of the battery housing 6 ( 7) includes hardware 9 to be assembled in a later process while exposing the cell output terminal 4 of the cell unit 3 connected in series/parallel.

For example, the housing terminal cover 1-1 covers the terminal portion connected to the cell output terminal 4 of the cell unit 3 without affecting the clamping force of the terminal portion, thereby preventing a short circuit and having a recognizable appearance. Even if it is not, it works so that it is easy to know that the corresponding part is the terminal part, which is a risk factor.

Therefore, the battery module (1) is a terminal cover integrated battery module that conceals the terminals of the battery module unit, recovers the short circuit prevention structure after disconnecting the battery, minimizes parts and secures workability in the connection process between modules based on the battery system, and does not affect the terminal fastening force characterized

Referring to FIG. 2 , the housing terminal cover 1-1 is composed of housing terminal parts 10 and 20, springs 30 and terminal covers 40 and 50.

Specifically, the housing terminal parts 10 and 20 are composed of a cover space 10 and an assembly groove 20 .

For example, the cover space 10 is made of a quadrangular shape with a “c” shape at the terminal connection portion 7a of the upper battery housing 7 of the battery housing 6, and the assembly groove 20 of the groove structure form And the assembly groove 20 is made of a groove structure formed on the upper/lower and side parts of the cover space 10, and the groove structure is a side fixing groove 21 dug into one of the side parts of the cover space 10. and vertical positioning grooves 23 dug in the upper and lower portions of the cover space 10, respectively.

In particular, the square shape of the “c” shape of the cover space 10 is made of a front open cross-section structure, and the side fixing groove 21 and the vertical positioning groove 23 of the assembly groove 20 are straight slots ( Slot) is formed. In this case, the "c" shape of the cover space 10 may form a stepped structure (see FIG. 3) at the inside of the vertical positioning groove 23.

Specifically, the spring 30 protrudes into the “c” shape of the front open end surface in a fixed state with the inner wall surface of the cover space 10, and elastically supports the lifters 40 of the terminal covers 40 and 50 to lift the lifters. It provides elastic restoring force when the lifter 40 is restored (ie, removed) after being compressed by pressing (ie, assembly) of the (40).

In particular, the spring 30 consists of three springs, two of which are spaced apart from each other on the upper inner wall surface, while one spring is located on the lower inner wall surface in the side fixing groove 21 of the assembly groove 20 is located on the opposite side of This is because the lifter 40 has a structure in which one part is fixed to the side fixing groove 21.

Therefore, the spring 30 acts to maintain the separation distance T of the terminal covers 40 and 50 with respect to the lifter 40 and impart torque stability when fastening the counterpart.

Specifically, the terminal covers 40 and 50 are composed of a lifter 40 and an inter busbar 50 that form a short circuit prevention structure when viewed from the outside. In this case, the lifter 40 is a part in which the inter bus bar 50 is assembled, and the inter bus bar 50 is exposed by assembling a copper part for electrical conduction into a soft rubber and plastic injection material having good elasticity. It is a structure.

For example, the lifter 40 has a rectangular shape that matches the shape of the cover space 10, and extends to one side of the cover body 41 elastically supported by the spring 30 and the cover body 41 to form an assembly groove ( 20) is composed of a fixed flange 45 fixed to the side fixing groove 21.

In particular, the covering body 41 perforates the lifter space 43, and the lifter space 43 functions as a space for inserting the inter bus bar 50, and the stopper 53 of the inter bus bar 50 inserted into the space By being fixed with the inter bus bar 50, it is possible to maintain the assembled state. In this case, the lifter space 43 is exemplified in a cross shape, but may be formed in a quadrangular shape.

In addition, the fixing flange 45 is composed of a “b”-shaped deformable portion 46 and a fixing portion 47, and the deformable portion 46 is bent at one side of the cover body 41 so that the cover body 41 ) and a 90-degree bending structure, and the fixing part 47 is bent at one end (ie, free end) of the deformable part 46 to form a 90-degree bent structure with the deformable part 46.

Furthermore, the deformable part 46 forms a bending groove 46a, and the bending groove 46a is formed in plural at intervals on the front and rear surfaces of the deformable part 46, thereby reducing the pressure of the lifter 40 (i.e., The deformation of the deformable portion 46 (see FIG. 3) that is compressed by assembly) acts to facilitate the deformation. In this case, the bending groove 46a is formed in a “<” clamp structure.

Therefore, the lifter 40 serves to secure the separation distance T, assists the movement of the inter bus bar 50, covers the side terminals, and enables deformation of the support structure when pressurized.

For example, the inter bus bar 50 is made of a rectangular bus bar body fitted into the lifter space 43 of the lifter 40, and a hole 51 and a stopper 53 are formed.

In particular, the hole 51 is punched in the center of the square-shaped bus bar body, and the connection hardware 9 electrically connected to the cell output terminal 4 of the cell unit 3 is coupled, and the stopper 53 is It is fixed to the lifter space 43 in a state of being inserted into the lifter space 43 of the lifter 40 by being made of a stepped structure at the top and bottom of the shaped bus bar body. In this case, the upper/lower stepped structure of the stopper 53 is located on one side of the square body toward the fixing flange 45 of the lifter 40.

Therefore, the inter bus bar 50 serves to form a conducting structure (eg, the bus bar of the cell output terminal 4) when assembling the counterpart.

Meanwhile, FIG. 3 shows an example in which the housing terminal cover 1-1 of the battery module 1 is coupled to the battery housing 6 surrounding the cell unit 3 in an exposed state.

As shown, the assembly process of the housing terminal cover 1-1 consists of lifter coupling (A) -> inter busbar coupling (B) -> lifter deformation (C). In this case, “->” is the order of the assembly process.

For example, the lifter coupling (A) is the “c”-shaped front surface of the cover space 10 in which the lifter 40 of the housing terminal cover 1-1 is formed at the terminal connection portion 7a of the upper battery housing 7. It is inserted into the open section.

Then, in the inner space of the “c” shape of the lifter 40, the upper and lower parts of the cover body 41 are positioned toward the vertical position groove 23 of the assembly groove 20, while the fixing flange 45 The deformable part 46 forms a fixed state by being inserted into the side fixing groove 21 of the assembly groove 20 while the fixing part 47 covers the “c” shaped one side opening. In this case, the spring 30 maintains the length of the initial state without being compressed to the separation distance T (see FIG. 2).

For example, in the inter bus bar coupling (B), the inter bus bar 50 of the housing terminal cover 1-1 is inserted into the lifter space 43 formed in the covering body 41 of the lifter 40. In this case, the stopper 53 of the inter bus bar 50 is press-fitted or brought into close contact with the lifter space 43 of the lifter 40 in a stepped structure on one side of the square-shaped body, thereby maintaining a fixed state by the combination of the stopper coupling (X) it forms

For example, the lifter deformation (C) is the pressing force (ie, pressing force ), the deformable portion 46 of the fixing flange 45 of the lifter 40 is folded, thereby switching to the lifter deformed state (K). In this case, the deformable part 46 is folded at intervals of the bending grooves 46a of the “<” clamp structure, and the folding length reduction is smaller than the separation distance T of the spring 30 (see FIG. 2).

Therefore, the lifter deformation C is the vertical position of the assembly groove 20 as the spring 30 is compressed and deformed by the length of the lifter deformation K, so that the separation distance T (see FIG. 2) of the spring 30 is removed. The assembly of the lifter 40 and the inter bus bar 50 is converted into a deeply positioned state in the space inside the cover space 10 of the step structure with respect to the groove 23.

From this, the housing terminal cover 1-1 is protected by the terminal connection portion 7a of the upper battery housing 7, so that the lifter 40 moves toward the terminal by the clamping force (ie, pressing force) when assembling the counterpart in the process line. At the time of final connection, the electrical connection between the cell output end 4 of the cell unit 3, which is the main body bus bar, and the inter bus bar 50 is completed, and short circuits can be prevented during the assembly process.

On the other hand, after the battery module 10 is transported, the housing terminal cover 1-1 releases the fastening force (ie, separation of the assembled state) according to the disassembly operation in the reverse order of the assembly operation at the site, and in this disassembly operation, the spring 30 ) returns to the initial position, and the spring restoring force pushes the inter bus bar 50 to maintain the separation distance T (see FIG. 2), so that the short circuit prevention structure can be restored to the cell output terminal 4. In this case, the removal operation is performed after pulling the assembly of the lifter 40 and the inter bus bar 50 or removing the fixing part 47 of the lifter 40 from the side fixing groove 21 of the assembly groove 20. It can be.

In this way, the housing terminal cover 1-1 secures short-circuit prevention and torque stability while the assembly method is the same as that of the battery housing 6 (ie, the upper battery housing 7) of a general battery module, and furthermore, The assembly of the lifter 40 and the inter bus bar 50 in the upper battery housing 7 maintains the separation distance T by applying the spring 30, thereby preventing electrical connection with the terminal during transportation and handling. short circuit can be prevented.

As described above, the terminal cover integrated battery module 1 according to the present embodiment is a cover formed on the externally exposed terminal connection portion 7a of the battery housing 6 surrounding the cell unit 3 having the cell output terminal 4. By combining the housing terminal cover (1-1) in the space (10) in a detachable/mountable manner, the battery housing (6) and the integrated terminal cover structure enable easy external recognition of the terminal part, which is a risk factor, and when applying a disposable terminal cover, which is required It is possible to secure product price competitiveness by reducing worker attention and additional personnel/time/facility/cost input, and in particular, workability is increased and housing is simplified by simplifying the shape of the counterpart used for electrical connection between battery modules (1) through the terminal cover structure Since the terminal cover 1-1 is elastically supported by the spring 30, it is possible to secure quality competitiveness by maintaining torque/strengthening stability of hardware assembly.

1: Battery module
1-1: housing terminal cover
3: cell unit 4: cell output terminal
6: battery housing 7: upper battery housing
7a: terminal connection part 8: lower battery housing
9: connection hardware
10: cover space 20: assembly groove
21: side fixing groove 23: vertical positioning groove
30: spring 40: lifter
41: cover body 43: lifter space
45: fixed flange 46: deformable part
46a: bending groove 47: fixing part
50: Inter Busbar
51: Hall 53: Stopper

Claims (12)

A housing terminal cover that is detachable/attached to the externally exposed terminal connection part of the battery housing surrounding the cell unit is included,
The housing terminal cover includes a spring forming a separation distance in the cover space of the terminal connection part;
A lifter that covers the cover space by combining with the assembly groove of the terminal connection part and is elastically supported by the spring, and
An inter busbar coupled to the lifter space of the lifter and forming a current structure with the cell output end of the cell unit
Battery module, characterized in that consisting of.
The method according to claim 1, wherein the cover space is made of a “c” shape in which the assembly groove is formed,
The spring is fixed to the inner wall surface of the “c” shape,
The battery module, characterized in that the fixing flange of the lifter is positioned as the “c”-shaped one-side opening in a state where the cover body of the lifter covers the cover space.
The battery module according to claim 2, characterized in that the spring is composed of a plurality.
The battery module according to claim 2, wherein the assembly groove comprises a side fixing groove and a vertical positioning groove.
The battery module according to claim 3, wherein the side fixing groove and the vertical positioning groove are formed as straight slots.
The method according to claim 4, wherein the lifter
The covering body is positionally constrained to the vertical position groove of the assembly groove,
The battery module, characterized in that the fixing flange is inserted into the side fixing groove of the assembly groove and fixed.
The method according to claim 6, wherein the fixing flange is formed of a bending structure of a deformable part and a fixing part,
The deformable part extends from the side of the covering body to cover the “c”-shaped one-side opening,
The battery module, characterized in that the fixing portion is fitted into the side fixing groove of the assembly groove at the end of the deformable portion.
The method according to claim 7, wherein the deformable portion forms a bending groove,
The battery module, characterized in that the bending groove serves to fold the deformable portion to which an external force is applied.
The method according to claim 2, wherein the lifter forms the lifter space in the covering body,
The battery module, characterized in that the inter bus bar is made of a bus bar body coupled to the lifter space.
The method according to claim 9, wherein the inter bus bar forms a hole and a stopper in the bus bar body,
The battery module, characterized in that the stopper is formed by forming one side of the bus bar body in a stepped structure.
The method according to claim 1, wherein the battery housing
an upper battery housing enclosing an upper portion of the cell unit and a lower battery housing enclosing a lower portion of the cell unit;
The battery module, characterized in that the upper battery housing forms the terminal connection portion.
The battery module according to claim 11, wherein the terminal connecting portion protrudes from the upper battery housing.

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