KR20230063031A - Electric vehicle battery housing manufacturing method and jig device therefor - Google Patents

Abstract

The present invention relates to a method of manufacturing a battery housing for an electric vehicle and a jig device for performing the method. The method of manufacturing a battery housing for an electric vehicle of the present invention comprises: a material preparation step of preparing materials for a battery housing panel and a cooling pad which are bonded together to form a battery housing for an electric vehicle; an adhesive application step of applying adhesive to a plurality of joint grooves formed on the plate surface of the cooling pad; a material temporary bonding step of temporarily bonding the battery housing panel and the cooling pad while directing the applied adhesive toward the battery housing panel; a material fixing step using rivets to fasten a plurality of rivets to the battery housing panel and the cooling pad, which are temporarily bonded to form one body; a material loading step of loading the battery housing panel and the cooling pad, which are fixed with the rivets to form one body, into a jig device; and a material welding step of joining the battery housing panel and the cooling pad by welding the material loaded into the jig device. Accordingly, the present invention can manufacture a battery housing for an electric vehicle by joining a battery housing panel and a cooling pad in an improved manner compared to the prior art, thereby contributing to improving product quality.

Description

Electric vehicle battery housing manufacturing method and jig device therefor}

The present invention relates to a method for manufacturing a battery housing of an electric vehicle and a jig device for performing the method, and more particularly, by bonding a battery housing panel and a cooling pad in an improved manner compared to the prior art. It relates to a method for manufacturing a battery housing for an electric vehicle, which can manufacture a battery housing for an electric vehicle, thereby contributing to product quality improvement, and a jig device for performing the method.

As environmental pollution problems caused by internal combustion engines have been highlighted, electric vehicles (EVs) and hybrid electric vehicles (HEVs) have replaced existing internal combustion engine vehicles as a way to solve the environmental pollution problems. It is attracting attention as an eco-friendly means of transportation.

Accordingly, interest in high-performance and high-capacity batteries, which are power sources of electric vehicles, is also increasing, and research and development on battery packs are actively being conducted in various schools, companies, and research institutes.

In order to operate an electric vehicle, since a tremendous amount of power thousands of times that of a general smartphone is required, an electric vehicle is equipped with at least tens to as many as thousands of battery cells.

In order to safely and efficiently manage a large number of battery cells, a battery management system that puts several battery cells into one frame to make a battery module, and collects these battery modules to manage the temperature or voltage of the battery. (BMS, Battery Management System) and a cooling device are added to finally form a battery pack.

The performance of the battery pack is mainly determined by the operating temperature of the battery cells, and it is important to properly maintain the average temperature of the cells in the battery pack and reduce the temperature deviation between the cells. It is known that an appropriate operating temperature of a battery cell is in the range of 20°C to 50°C.

When this temperature range is exceeded during charging and discharging or driving, the performance of the battery cell may be deteriorated, as well as fire and further explosion may occur. In addition, it adversely affects the electrochemical reaction, charge-discharge efficiency, charge acceptance, etc., and eventually reduces battery life.

In addition, when an internal resistance imbalance occurs between cells due to a temperature deviation, a problem of replacing the battery module occurs even though there are many usable battery cells remaining. Therefore, there is a need for a battery cooling system capable of maintaining a battery at an appropriate temperature and reducing a temperature deviation between cells.

Cooling of the battery uses a cooling fluid, and is generally performed in units of battery modules. Cooling methods can be divided into air cooling and water cooling.

The air-cooling method is a method in which a cooling fan is mainly attached to the battery tray, air is sucked in from the outside, the air is cooled from the inlet side of the battery tray, and then the air is exhausted through the rear outlet of the battery tray. The water cooling method is used when the heat generation is relatively large, and the battery pack is cooled by introducing cooling water into the water cooling plate.

On the other hand, when manufacturing such a battery pack, a bonding process between a battery housing panel and a cooling pad, which are the unit components of the battery pack, is involved. In the past, since it has relied on a simple bonding process, efficiency is reduced as well as However, considering that the product quality is inevitably degraded, it is necessary to develop technology to compensate for this.

Korean Intellectual Property Office Application No. 10-2009-0126408

An object of the present invention is to manufacture a battery housing of an electric vehicle by bonding a battery housing panel and a cooling pad in an improved manner than before, thereby contributing to product quality improvement , To provide a method for manufacturing a battery housing of an electric vehicle and a jig device for performing the method.

The above object is to prepare materials for a battery housing panel and a cooling pad that are mutually bonded to form a battery housing of an electric vehicle; an adhesive application step of applying adhesive to a plurality of joint grooves formed on the surface of the cooling pad; a material temporary bonding step of temporarily bonding the battery housing panel and the cooling pad while directing the coated contact body toward the battery housing panel; A material fixing step by means of rivets fastening and fixing a plurality of rivets to the battery housing panel and the cooling pad, which are temporarily bonded to form one body; a material loading step of loading the battery housing panel and the cooling pad, which are fixed with the rivets and form one body, to a jig device; and a material welding step of bonding the battery housing panel and the cooling pad by welding the material loaded into the jig device.

The jig device includes: a plurality of U-shaped clamp units disposed inside the battery housing panel and the cooling pad for in-line welding of the battery housing panel and the cooling pad; A plurality of parts disposed on outer sides of the battery housing panel and the cooling pad to clamp and fix side areas of the battery housing panel and the cooling pad for out-line welding of the battery housing panel and the cooling pad. side clamp; and a plurality of pins disposed inside the battery housing panel and the cooling pad and fixing the battery housing panel and the cooling pad at corresponding positions.

In the material welding step, the material in-line welding step of performing in-line welding of the battery housing panel and the cooling pad by welding along a circumferential line of the U-shaped clamp unit through the U-shaped clamp unit. ; A U-shaped clamp unit removal step of removing the U-shaped clamp unit; and a material outline welding step of performing out-line welding of the battery housing panel clamped by the side clamps and the cooling pad.

The object is an apparatus for performing the battery housing manufacturing method of an electric vehicle according to any one of claims 1 to 3, wherein the battery housing panel is welded in-line between the battery housing panel and the cooling pad. and a plurality of U-shaped clamp units disposed inside the cooling pad. A plurality of parts disposed on outer sides of the battery housing panel and the cooling pad to clamp and fix side areas of the battery housing panel and the cooling pad for out-line welding of the battery housing panel and the cooling pad. side clamp; and a plurality of pins disposed inside the battery housing panel and the cooling pad and fixing the battery housing panel and the cooling pad at corresponding positions. is also achieved by

According to the present invention, a battery housing of an electric vehicle can be manufactured by bonding a battery housing panel and a cooling pad in an improved manner compared to the prior art, thereby contributing to product quality improvement. there is

1 is an exploded structural diagram of a battery housing of an electric vehicle.
2 is an enlarged structural view of the battery housing panel shown in FIG. 1;
3 is an enlarged structural diagram of a cooling pad.
4 is a flowchart of a method for manufacturing a battery housing of an electric vehicle according to an embodiment of the present invention.
5 to 8 are some process images according to a method for manufacturing a battery housing of an electric vehicle according to an embodiment of the present invention.
9 is a structural diagram of a jig device for performing a method of manufacturing a battery housing of an electric vehicle according to another embodiment of the present invention.
10 is a control block diagram of the jig device of FIG. 9 .

Advantages and features of the present invention, and methods for achieving them will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms.

In this specification, this embodiment is provided to complete the disclosure of the present invention, and to completely inform those skilled in the art of the scope of the invention to which the present invention belongs. And the invention is only defined by the scope of the claims.

Thus, in some embodiments, well-known components, well-known operations and well-known techniques have not been described in detail to avoid obscuring the interpretation of the present invention.

Like reference numbers designate like elements throughout the specification. And the terms used (mentioned) in this specification are for describing the embodiments and are not intended to limit the present invention.

In this specification, the singular form also includes the plural form unless otherwise specified in written phrases. Also, components and operations (operations) referred to as 'include (or include)' do not exclude the presence or addition of one or more other components and operations.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning that can be commonly understood by those of ordinary skill in the art to which the present invention belongs.

In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless they are defined.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is an exploded structure diagram of a battery housing of an electric vehicle, FIG. 2 is an enlarged structure diagram of a battery housing panel shown in FIG. 1, FIG. 3 is an enlarged structure diagram of a cooling pad, and FIG. 4 is an electric vehicle according to an embodiment of the present invention. 5 to 8 are some process images according to the method for manufacturing a battery housing for an electric vehicle according to an embodiment of the present invention.

Referring to these drawings, the present invention can manufacture the battery housing 100 of an electric vehicle by bonding a battery housing panel 110 and a cooling pad 120 in an improved manner compared to the prior art. A method for manufacturing a battery housing of an electric vehicle, which can contribute to product quality improvement, and a jig device for performing the method

The present invention, which can provide such an effect, can be applied to the jig device shown in FIGS. 7 and 8 in addition to the manufacturing method of the battery housing of the electric vehicle shown in FIG. 4, the scope of its rights.

Looking first at the method for manufacturing a battery housing for an electric vehicle according to an embodiment of the present invention, in this embodiment, the method for manufacturing a battery housing for an electric vehicle according to an embodiment of the present invention includes a material preparation step (S10) and an adhesive application step (S20). ), material temporary bonding step (S30), material fixing step (S40), material loading step (S50) and material welding step (S60) may be included.

The material preparation step (S10) is a process of preparing materials for a battery housing panel (110) and a cooling pad (120), which will be bonded together to form the battery housing 100 of the electric vehicle.

The battery housing panel 110 and the cooling pad 120 may be formed of thin plate-like members as shown in FIGS. 1 to 3 . In particular, a plurality of junction grooves 121 are formed in the cooling pad 120 . An adhesive 131 is applied to the plurality of bonding grooves 121 .

The adhesive application step ( S20 ) is a process of applying the adhesive 131 to the plurality of joint grooves 121 formed on the plate surface of the cooling pad 120 as shown in FIG. 5 . The adhesive 131 is a means for temporarily bonding the battery housing panel 110 and the cooling pad 120 together.

The material provisional bonding step (S30) is a process of temporarily bonding the battery housing panel 110 and the cooling pad 120 while directing the coated adhesive body toward the battery housing panel 110 as shown in FIG. 6 . Since the adhesive 131 is applied, the battery housing panel 110 and the cooling pad 120 are adhered to form one body, but are not completely fixed.

The material fixing step (S40) is a process of fastening and fixing a plurality of rivets 133 to the battery housing panel 110 and the cooling pad 120 that are temporarily bonded to form one body. Since the material is fixed by fastening the rivet 133, the battery housing panel 110 and the cooling pad 120 are fixed as one body only after performing this process.

The material loading step (S50) is a process of loading the battery housing panel 110 and the cooling pad 120, which are fixed with rivets 133 and form one body, to the jig device 140.

The jig device 140 includes a plurality of U-shaped clamps disposed inside the battery housing panel 110 and the cooling pad 120 for in-line welding of the battery housing panel 110 and the cooling pad 120. Disposed on the outer side of the unit 150, the battery housing panel 110, and the cooling pad 120, the battery housing panel is for out-line welding of the battery housing panel 110 and the cooling pad 120. A plurality of side clamps 161 clamping and fixing the side areas of the cooling pad 120 and the battery housing panel 110, disposed inside the battery housing panel 110 and the cooling pad 120, and holding the battery housing panel 110 at the corresponding positions. ) and a plurality of pins 163 fixing the cooling pad 120 .

Here, the meaning of loading the battery housing panel 110 and the cooling pad 120 into the jig device 140 means that the U-shaped clamp unit 150, the side clamp 161 and the pin forming the jig device 140 as shown in FIG. It means that 163 is disposed on the battery housing panel 110 and the cooling pad 120 that are bonded to each other. The U-shaped clamp unit 150, the side clamp 161, and the pin 163 may be individually placed, that is, loaded, or after loading the battery housing panel 110 and the cooling pad 120 on a separate loading table. , the U-shaped clamp unit 150, the side clamp 161, and the pin 163 may be automatically disposed at corresponding positions. This is described later.

The material welding step (S60) is a process of bonding the battery housing panel 110 and the cooling pad 120 by welding the material loaded in the jig device 140.

In this material welding step (S60), the battery housing panel 110 and the cooling pad 120 are welded along the circumferential line of the U-shaped clamp unit 150 via the U-shaped clamp unit 150 as shown in FIGS. 7 and 8. ) material in-line welding step (S61) to proceed with in-line welding, a U-shaped clamp unit removal step (S62) to remove the U-shaped clamp unit 150, and side clamps 161 A material outline welding step ( S63 ) of performing outline welding of the clamped battery housing panel 110 and the cooling pad 120 may be included.

Hereinafter, a process of manufacturing the battery housing 100 will be described.

First, as shown in FIGS. 1 to 3 , materials for the battery housing panel 110 and the cooling pad 120 to be bonded together to form the battery housing 100 of the electric vehicle are prepared.

Next, as shown in FIG. 5 , an adhesive 131 is applied to the plurality of bonding grooves 121 formed on the surface of the cooling pad 120 . The adhesive 131 is a means for temporarily bonding the battery housing panel 110 and the cooling pad 120 together.

Next, as shown in FIG. 6 , the battery housing panel 110 and the cooling pad 120 are temporarily bonded while the applied adhesive faces the battery housing panel 110 .

Then, as shown in FIG. 7 , the battery housing panel 110 and the cooling pad 120 , which are fixed with rivets 133 and form one body, are loaded into the jig device 140 . At this time, the U-shaped clamp unit 150, the side clamp 161, and the pin 163 may be individually disposed, that is, loaded, or the battery housing panel 110 and the cooling pad 120 may be loaded on a separate loading table. After that, the U-shaped clamp unit 150, the side clamp 161, and the pin 163 may be automatically disposed at corresponding positions.

Next, the battery housing panel 110 and the cooling pad 120 are bonded by welding the materials loaded in the jig device 140 . That is, as shown in FIGS. 7 and 8 , by welding along the circumferential line of the U-shaped clamp unit 150 through the U-shaped clamp unit 150, the in-line (In-Line) of the battery housing panel 110 and the cooling pad 120 is performed. ) After welding, the U-shaped clamp unit 150 is removed, and then the outer-line welding of the battery housing panel 110 and the cooling pad 120 clamped by the side clamps 161 is performed. It can be completed by progressing.

According to the present embodiment, which operates based on the structure described above, the battery housing 100 of an electric vehicle can be manufactured by bonding the battery housing panel 110 and the cooling pad 120 in an improved manner compared to the prior art. , thereby contributing to product quality improvement.

9 is a structural diagram of a jig device for performing a method for manufacturing a battery housing of an electric vehicle according to another embodiment of the present invention, and FIG. 10 is a control block diagram of the jig device of FIG. 9 .

Referring to these drawings, the jig device 240 according to the present embodiment includes a battery housing panel 210 formed into one body, a loading table 241 on which a cooling pad 220 is loaded, and a battery housing panel 210. A plurality of U-shaped clamp units 242 disposed inside the battery housing panel 210 and the cooling pad 220 for in-line welding of the cooling pad 220, and a U-shaped clamp unit 242 The battery housing panel 210 and the cooling pad 220 on the loading table 241 are disposed on the outer side of the battery housing panel 210 and the cooling pad 220. A plurality of side clamps 244 clamping and fixing the side areas of the battery housing panel 210 and the cooling pad 220 for out-line welding of the housing panel 210 and the cooling pad 220; The second driving device 245 for disposing the side clamp 244 to the battery housing panel 210 and the cooling pad 220 on the loading table 241, and the inside of the battery housing panel 210 and the cooling pad 220. A plurality of pins 246 disposed on and fixing the battery housing panel 210 and the cooling pad 220 at corresponding positions, and the pins 246 are connected to the battery housing panel 210 and the cooling pad on the loading table 241 ( 220) and a controller 280 that automatically controls the operation of the first to third driving devices 243, 245, and 247.

The controller 280 may include a central processing unit 281 (CPU), a memory 282 (MEMORY), and a support circuit 283 (SUPPORT CIRCUIT).

The central processing unit 281 may be one of various industrially applicable computer processors to automatically control the operation of the first to third driving units 243 , 245 , and 247 in this embodiment.

The memory 282 (MEMORY) is connected to the central processing unit 281. Memory 282 is a computer-readable recording medium that can be installed locally or remotely, and is readily available, such as, for example, random access memory (RAM), ROM, floppy disk, hard disk, or any other form of digital storage. It may be at least one memory.

The support circuit 283 (SUPPORT CIRCUIT) is coupled with the central processing unit 281 to support the typical operation of the processor. This support circuit 283 may include a cache, a power supply, a clock circuit, an input/output circuit, a subsystem, and the like.

In this embodiment, the controller 280 automatically controls the operation of the first to third driving devices 243 , 245 , and 247 , and such a series of control processes may be stored in the memory 282 . Typically software routines may be stored in memory 282 . Software routines may also be stored or executed by other central processing units (not shown).

Although processes according to the present invention have been described as being executed by software routines, it is possible that at least some of the processes of the present invention are performed by hardware. As such, the processes of the present invention may be implemented in software running on a computer system, or in hardware such as an integrated circuit, or in a combination of software and hardware.

Accordingly, when the controller 280 operates, the first to third driving devices 243, 245, and 247 operate separately or simultaneously under the control of the controller 280, for example, as shown in FIG. 7, the U-shaped clamp unit 242, the side clamp 244 and the pin ( 246) can be automatically placed in the corresponding location.

Even if this embodiment is applied, the battery housing 200 of an electric vehicle can be manufactured by bonding the battery housing panel 210 and the cooling pad 220 in an improved manner compared to the prior art, thereby contributing to product quality improvement. .

As such, the present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, it should be said that such modifications or variations fall within the scope of the claims of the present invention.

100: battery housing 110: battery housing panel
120: cooling pad 121: junction groove
131: adhesive 133: rivet
140: jig device 150: U-shaped clamp unit
161: side clamp 163: pin

Claims (4)

A material preparation step of preparing materials for a battery housing panel and a cooling pad that are mutually bonded to form a battery housing of an electric vehicle;
an adhesive application step of applying adhesive to a plurality of joint grooves formed on the surface of the cooling pad;
a material temporary bonding step of temporarily bonding the battery housing panel and the cooling pad while directing the coated contact body toward the battery housing panel;
A material fixing step by means of rivets fastening and fixing a plurality of rivets to the battery housing panel and the cooling pad, which are temporarily bonded to form one body;
a material loading step of loading the battery housing panel and the cooling pad, which are fixed with the rivets and form one body, to a jig device; and
and a material welding step of bonding the battery housing panel and the cooling pad by welding the material loaded into the jig device.
According to claim 1,
The jig device,
a plurality of U-shaped clamp units disposed inside the battery housing panel and the cooling pad for in-line welding of the battery housing panel and the cooling pad;
A plurality of parts disposed on outer sides of the battery housing panel and the cooling pad to clamp and fix side areas of the battery housing panel and the cooling pad for out-line welding of the battery housing panel and the cooling pad. side clamp; and
and a plurality of pins disposed inside the battery housing panel and the cooling pad and fixing the battery housing panel and the cooling pad at corresponding positions.
According to claim 2,
The material welding step,
a material in-line welding step of performing in-line welding of the battery housing panel and the cooling pad by welding along a circumferential line of the U-shaped clamp unit through the U-shaped clamp unit;
A U-shaped clamp unit removal step of removing the U-shaped clamp unit; and
and a material outline welding step of performing out-line welding of the battery housing panel clamped by the side clamps and the cooling pad.
An apparatus for performing the method of manufacturing a battery housing of an electric vehicle according to any one of claims 1 to 3,
a plurality of U-shaped clamp units disposed inside the battery housing panel and the cooling pad for in-line welding of the battery housing panel and the cooling pad;
A plurality of parts disposed on outer sides of the battery housing panel and the cooling pad to clamp and fix side areas of the battery housing panel and the cooling pad for out-line welding of the battery housing panel and the cooling pad. side clamp; and
A jig device for performing a battery housing manufacturing method for an electric vehicle, comprising a plurality of pins disposed inside the battery housing panel and the cooling pad and fixing the battery housing panel and the cooling pad at corresponding positions.

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