KR102066910B1 - Base Plate for Battery Pack Having Three-layered Structure - Google Patents

Abstract

The present invention is a base plate mounted with a plurality of battery modules and coupled to the pack cover to form a battery pack, comprising: a first plate fixed to an external device and supporting the load of the battery modules; A second plate positioned on the first plate and having a sealing portion coupled to the pack cover to seal the battery modules from the outside; And a third plate positioned on the second plate and having at least one module mounting portion for mounting the battery module. It includes, The first plate, the second plate and the third plate provides a base plate for a battery pack, characterized in that made of a structure that is closely stacked in the vertical direction.

Description

Base Plate for Battery Pack Having Three-layered Structure}

The present invention relates to a battery pack base plate having a three-layer laminated structure.

Recently, as technology development and demand for mobile devices increase, the demand for secondary batteries capable of charging and discharging as energy sources is rapidly increasing. Accordingly, many studies on secondary batteries capable of meeting various needs have been conducted. In addition, the secondary battery is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle that is proposed as a solution for the air pollution of conventional gasoline vehicles and diesel vehicles that use fossil fuels. It is also drawing attention as a power source such as (Plug-In HEV).

Therefore, an electric vehicle (EV) that can be driven only by a battery, a hybrid electric vehicle (HEV) using a battery and an existing engine, and the like have been developed, and some are commercialized. Ni-MH secondary batteries are mainly used as secondary batteries as EV and HEV power sources, but recently, studies using lithium secondary batteries with high energy density, high discharge voltage, and output stability have been actively conducted. And some have been commercialized.

When the secondary battery is used as a power source of a vehicle, the secondary battery is used in the form of a battery pack including a plurality of battery modules or battery module assemblies.

Vehicle battery packs are generally mounted in an interior space such as a trunk, and are electrically connected to the respective devices. However, large and small vibrations inevitably occur during operation of the vehicle. This is a minute vibration caused by the vibration of the engine or motor, there is also a large vibration caused by the unevenness of the road, such as a bump.

Due to such vibration, the sealing state of the vehicle battery pack may be damaged, and foreign matter may penetrate the outside, or the vehicle battery pack fixed to the vehicle frame may be separated.

In addition, since the vehicle battery pack supplies power to each of the electrically connected devices, if the electrical connection state is released irrespective of the user's intention, the driving control of the user may not be possible, which may lead to a large accident. .

Therefore, even when such external vibrations or shocks are applied, there is a high necessity for a technology capable of firmly fixing the vehicle battery pack to the frame of the vehicle and at the same time preventing the ingress of foreign materials into the vehicle battery pack.

The present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.

The inventors of the present application, after extensive research and various experiments, as described later, when the base plate constituting the battery pack in combination with the pack cover to form a specific three-layer laminated structure, sealing of the battery pack for vehicles At the same time to improve the performance and stably fixed to the vehicle frame as a result it was confirmed that the stability is improved, the present invention was completed.

Accordingly, the base plate according to the present invention is a base plate, which is mounted on a plurality of battery modules and is coupled to a pack cover to form a battery pack, the first plate being fixed to an external device and supporting the load of the battery modules; A second plate positioned on the first plate and having a sealing portion coupled to the pack cover to seal the battery modules from the outside; And a third plate positioned on the second plate and provided with at least one module mounting unit for mounting the battery module. It includes and the first plate, the second plate and the third plate is made of a structure that is closely stacked in the vertical direction.

The battery modules are generally composed of a plurality of battery modules, but it is not intended to exclude the inclusion of only one battery module, and in some cases, the battery module may include only one battery module. However, it is desirable to improve the energy density of the battery pack using two or more battery modules. Furthermore, the battery pack in which the battery modules are spaced apart from each other in a shape corresponding to the dead space of the device on which the battery pack is mounted may improve the space efficiency of the device.

As defined above, the base plate for the battery pack of the three-layer laminated structure according to the present invention is composed of a first plate, a second plate and a third plate having different functions.

The first plate is formed in a plate shape, the base plate may be fixed to the frame of the external device, for example, the vehicle through the first plate.

In addition, the base plate may be formed to completely seal the inside in combination with the pack cover. To this end, the base plate further includes a second plate, and the second plate is provided with a seal that can seal the battery modules in combination with the pack cover.

In addition, the base plate includes a third plate provided with a module mounting unit for mounting the battery module. The module mounting portion may be formed to mount a control member or a cooling member for controlling the battery module in addition to the battery module.

In one specific example, the third plate includes: a first plate member extending in a first direction and rectangular in planar shape; And a second plate member extending in a second vertical direction in the first direction and rectangular in plane. It includes, wherein the first plate-like member and the second plate-like member may be vertically coupled on the same plane may be formed in a T-shape.

In detail, the battery pack in which the base plate and the pack cover are combined may be formed in a T-shape so as to be positioned over the lower rear seat of the vehicle and the lower part of the armrest.

Accordingly, in order to form the base plate in a T-shape, the third plate may be formed in a shape in which the first plate-shaped member and the second plate-shaped member which are rectangular in planar shape are combined.

In relation to the first direction and the second direction, for example, the width direction of the vehicle on which the base plate is mounted may be defined as the “first direction” and the length direction of the vehicle may be defined as the “second direction”.

The first plate member extends in the first direction and the second plate member extends in the second direction so that the state where the first plate member and the second plate member are coupled to each other is formed in a T shape.

Accordingly, the first plate member and the second plate member may be formed to have different widths based on the length direction of the vehicle, and may be formed in a state in which the rectangular plate members having different widths are coupled to each other. Specifically, the width of the first plate member may be formed to have a range of 100% to 400% of the width of the second plate member.

In this structure, one side of the first plate-like member and one side of the second plate-shaped member may be coupled in a direction perpendicular to each other on the same plane. In detail, one side of the second plate member may be coupled to the center of one side of the first plate member.

As such, by forming the base plate in a T-shape, a horizontal cross section of the battery pack may be formed in a T-shape, so that an operator may repair or replace the battery pack without interference of other devices mounted on the vehicle. It can be facilitated, and the space inside the vehicle can be used more efficiently, allowing the user to use the inside space of the vehicle more widely.

In addition, according to the above structure, the battery pack is located at the center of the device such as a vehicle in a plane, so that the weight applied to both the left and right sides of the device can be configured to balance, thereby applying by the battery pack The mechanical design of the device in consideration of the weight to be achieved can be performed more easily.

In one embodiment of the present invention, the third plate is formed in a T-shape, but the shape of the third plate is not limited thereto, and may be formed in another shape in consideration of the shape, size, use, etc. of the vehicle. to be.

In one specific example, the module mounting portion of the third plate has a frame structure in which an opening is formed in the center while supporting an outer periphery lower end of the battery module, and one battery module or two or more battery modules in one module mounting portion. Can be mounted.

In this structure, the module mounting portion supports the lower ends of both sides of the battery module, the cooling member for cooling the battery module is inserted into the opening may be formed to exchange heat with the lower portion of the battery module.

The module mounting portion formed on the third plate may be configured in detail with first to third module mounting portions. In this structure, the arrangement directions of the battery modules fixed to the first module mounting part and the second module mounting part are different from each other, and the arrangement directions of the battery modules fixed to the second module mounting part and the third module mounting part may be the same. have.

At this time, the first plate-like member of the third plate is a pair of first module mounting portions positioned opposite to both sides in the first direction, and the battery module orientation of the first module mounting portion located between the first module mounting portions. It may include a second module mounting portion of a different battery module orientation.

In detail, the pair of first module mounts may be symmetrically positioned at both sides of the first plate-shaped member, and a second module mount may be formed between the pair of symmetrical first module mounts.

In this structure, the first module mounting portion may be formed long in the second direction while having a predetermined width, and thus, the battery modules may also be arranged in a line in the second direction when mounted in the first module mounting portion.

Alternatively, the battery modules mounted on the second module mounting unit may be arranged in a line in the first direction. Therefore, the second module mounting portion has an opening shape having a width equal to the length of the battery module in the second direction, and the width in the first direction may vary because the number of battery modules may be differently formed according to a designer's selection.

On the other hand, the second plate-like member of the third plate may include a third module mounting portion of the same battery module orientation as the second module mounting portion. In addition, the shape of the third module mounting portion may be formed in the same manner as the shape of the second module mounting portion described above. However, this specifies that it may be formed differently at the designer's choice.

As such, as the arrangement directions of the battery modules are different from each other, the energy density of the battery pack may be improved in a limited space inside the vehicle. In addition, by configuring the battery pack in a more various shape, it is possible to more easily overcome the restrictions on the mounting space of the battery pack.

In the present invention, the battery cells constituting the battery modules may be generally made of a pouch-type battery cell of a plate-like structure.

In one specific example, the third plate may have a structure in which fastening protrusions protruding upward for mounting fixing of the battery module are formed. The fastening protrusions may be formed of, for example, welded bolts, and the battery module may be stably fixed by coupling the fixing member to the fastening protrusion while the battery module is mounted. The fixing member may be a member such as an end plate, a bracket, or the like, but is not limited thereto.

In one specific example, the island-shaped beads may be formed in the first plate and the second plate, respectively, in an upwardly protruding structure or a downwardly indented structure.

Island type beads are independently shaped beads, and these island type beads are formed on the plate in a form arranged at regular intervals, thereby improving the strength of the plate.

In one specific example, the island-type beads of the upwardly projecting structure are formed in the first plate, the island-shaped beads of the downwardly indented structure are formed in the second plate, and the island-type beads of the first plate are formed of the first plate. It may be a structure facing the island-shaped beads of the two plate. The island beads may be formed, for example, in a planar rectangular or square shape.

As such, island type beads are formed in the first and second plates, thereby minimizing the meandering and torsional phenomena of the first plate and the second plate while being in close contact, contributing to the increase in strength in the stacking direction.

On the other hand, the second plate is located between the first plate and the third plate, in combination with the pack cover functions to seal the battery module. In other words, the pack cover is not directly bonded to the first plate, but separately using a second plate.

As the first plate is directly coupled to an external device such as a vehicle, since external vibration or shock is directly transmitted, there is a possibility that the battery module is not completely sealed.

If the first plate and the cover pack are combined to seal the battery module, spaces may be spaced between the first plate and the cover pack due to continuous vibration while the vehicle is running, and water or dust may be formed through the space. Foreign objects such as these can penetrate and pose a serious danger.

Therefore, the second plate is stacked on the first plate, and the battery pack can be completely sealed from the outside by providing a seal on the second plate.

The sealing part may include an outer circumferential protrusion protruding upward at a predetermined height and width along an outer periphery of the upper surface of the second plate, and the sealing part is formed to protrude upward at a predetermined height and width, thereby causing external vibration or impact. At the same time as a buffer to the battery pack can be shielded tightly.

The sealing unit may further include a sealing gasket interposed at an interface with the pack cover when the pack cover is coupled to the outer protrusion. The gasket may be formed of, for example, a rubber material, but is not limited thereto.

The second plate, unlike the first plate or the third plate, is preferably made of one unit member to provide a high sealing property.

Meanwhile, an outer circumferential end of the third plate may be tightly fixed to the inner side of the outer circumferential protrusion. By fitting the third plate in the vertical direction to the inner side of the outer protrusion, it is possible to exert a bonding force of a certain strength or more without a separate bolt-nut coupling or bonding through welding.

In addition, a pair of outwardly protruding first fastening portions are formed at an end portion of the second plate-shaped member coupled to the first plate-shaped member, and the first plate-shaped member is indented downward in a position corresponding to the first fastening portions. The second fastening portions of the second fastening portions are formed, and the first fastening portions may be coupled to each other by spot welding in a state where the first fastening portions are accommodated in the second fastening portions.

At this time, the third plate may be formed by fitting through the first fastening portion and the second fastening portion to increase the contact area during the coupling, and may not be released to the external force in the horizontal direction. In addition, spot welding may be applied to a minute gap in a state in which the first fastening part and the second fastening part are coupled, thereby ultimately strongly coupling the first plate member and the second plate member.

In one specific example, the first plate comprises: a third plate member corresponding to the first plate member of the third plate; And a fourth plate member corresponding to the second plate member of the third plate. It includes, wherein the third plate-like member and the fourth plate-like member may be vertically coupled on the same plane to form a T-shape.

In detail, like the third plate, the first plate may be configured in a state in which two different plate-like members are coupled.

The first plate is made of a material or structure that is relatively rigid than the third plate. This is because the first plate is directly coupled to the frame of the vehicle and serves to support the battery module, it may be preferably formed of a metal member thicker than the thickness of the second and third plates.

In one example, the first plate is formed such that two different plate-like members, the third and fourth plate-like members, are joined, which is a product formability due to the selection of a rigid material for mechanical rigidity and an increase in thickness. Considered.

The first plate and the second plate may have a structure in which a plurality of fixing holes for coupling to an external device are drilled on the outer periphery thereof.

In this structure, the fixing holes of the first plate are formed on the island-shaped bead of the upwardly projecting structure, and the fixing holes of the second plate may be formed in a portion extending outward from the seal.

In detail, the fixing holes of the first plate may be spaced apart along the outer periphery of the first plate to be coupled to the external device through a coupling member such as a bolt. In addition, the second plate may form a wing portion extending in an outer direction of the sealing portion, and may form second plate fixing holes on the wing portion.

In the above structure, each of the first and second plate fixing holes may be disposed in a position facing each other so that one coupling member may pass through the first and second plate fixing holes to be fixed to the external device.

On the other hand, the third plate, at least one stud bolt that can be mounted and fixed to the control member for controlling the operation of the battery module may be provided.

In one specific embodiment, the battery module may be electrically connected and may have a structure including a plurality of battery cells arranged adjacently. Each of the battery modules may include, for example, 12 to 24 battery cells, and the battery cells may be formed of lithium secondary batteries. The quantity of battery cells constituting the battery modules may be the same or different.

Since the configuration of the lithium secondary battery and a method of manufacturing the same are well known in the art, a detailed description thereof will be omitted herein.

The present invention also provides a battery pack having a structure in which the battery modules are mounted on the base plate and the pack cover can be coupled.

The pack cover is coupled to the sealing portion of the second plate of the base plate, specifically, the second plate made of one unit member, and exhibits high shielding properties.

The present invention also provides a device including the battery pack as a power source.

The device may be, for example, any one selected from the group consisting of an electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle.

As described above, by forming the base plate in the T-shape, the battery pack can be mounted in the lower portion of the center of the vehicle, for example, the lower portion of the rear seat boarding space, and does not occupy the internal space such as the trunk of the vehicle. It can make efficient use of the space inside the vehicle.

In one specific example, the battery pack in the device may be a structure that is mounted in a structure isolated from the interior (boarding space) of the vehicle.

As described above, when the battery pack is exposed to a high temperature environment or malfunctions, when an internal short circuit occurs in the battery cell constituting the battery pack, decomposition reaction of the electrolyte occurs at the anode interface, thereby causing gas A large amount is generated and eventually the battery case ruptures due to an increase in internal pressure and is discharged out of the battery cell.

In general, these internal gases contain toxic components harmful to the human body, such as carbon monoxide, causing safety problems.

On the other hand, the battery pack according to the present invention is mounted in a device in a structure that is isolated from the interior of the vehicle, it is possible to prevent the phenomenon that the internal gas flows into the interior of the vehicle, thereby solving the safety problem.

Since the structure and fabrication method of such a device are known in the art, detailed description thereof will be omitted herein.

As described above, the battery pack base plate according to the present invention is formed in a state in which the first to third plates having different functions are stacked, and are firmly fixed to an external device and simultaneously coupled with the pack cover to the inside. The mounted battery module can be completely sealed from the outside, and thus, in a device such as an automobile, it is possible to overcome the limitation on the mounting position of the battery pack, and to minimize the volume to capacity of the battery pack, There is an effect that can maximize the space utilization of the device.

1 is an exploded perspective view of a base plate for a battery pack according to an embodiment of the present invention.
Figure 2 is a perspective view showing a state in which the base plate for the battery pack of Figure 1 is coupled.
3 is a perspective view schematically illustrating a structure of a second plate of the base plate for a battery pack of FIG. 1.
4 is a perspective view schematically illustrating a structure of a third plate of the battery pack base plate of FIG. 1.
5 is a perspective view schematically illustrating a state in which a fixing member is coupled to a third plate of the battery pack base plate of FIG. 1.
6 is an exploded perspective view illustrating a state in which a cooling member is mounted on the battery pack base plate of FIG. 1.
7 is a perspective view illustrating a state in which battery modules are mounted on the base plate for the battery pack of FIG. 1.
8 is a perspective view of a battery pack in one embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings according to embodiments of the present invention, but the scope of the present invention is not limited thereto.

1 is an exploded perspective view of a base plate for a battery pack of a three-layer laminated structure according to an embodiment of the present invention, Figure 2 is a perspective view showing a combined state.

1 and 2 together, the battery plate base plate 100 according to an embodiment of the present invention is the first plate 110, the second plate 140 and the third plate ( 170).

The base plate 100 has a structure in which the second plate 140 is stacked on the first plate 110, and the third plate 170 is sequentially stacked on the second plate 140.

The first plate 110 has a substantially T-shaped plate shape in plan view and is directly fixed to an external device, for example, a frame of a vehicle. In order to fix to the frame of the vehicle, it includes a plurality of first fixing holes 117 spaced apart.

The second plate 140 is formed of a single unit and includes the second fixing holes 147 at positions facing the first fixing holes 117 formed in the first plate 110. Accordingly, the base plate 100 may be fixed to the frame (not shown) of the vehicle by passing a fastening member (not shown) through the first fixing holes 117 and the second fixing holes 147.

Island-type beads 111 having an upwardly protruding structure are formed in the first plate 110, and island-type beads 141 having a downwardly indented structure are formed in the second plate 140, and the first plate ( Island type beads 111 of 110 may face island type beads 141 of second plate 140.

Island-shaped beads 111 and 141 may be, for example, formed in a rectangular or square shape in plan view, but are not limited thereto.

The second plate 140 is positioned between the first plate 110 and the third plate 170, and functions to seal the battery module (not shown) by combining with the pack cover (not shown). In other words, the pack cover is not coupled to the first plate 110 composed of two members, but is bonded using the second plate 140 composed of one unit, thereby providing a high degree of sealing.

To this end, the second plate 140 includes a seal to which the pack cover is coupled. The sealing part includes an outer circumferential protrusion 144 protruding upward at a predetermined height and width along an outer circumference of the upper surface of the second plate 140, and an outer circumference of the third plate 170 inside the outer circumferential protrusion 144. By tightly fixing the end portion, the third plate 170 may be fixed to the second plate 140.

The third plate 170 extends in the first direction (I) and is rectangular in plan view, and extends in the second direction (II) perpendicular to the first direction and is planar in shape. The second plate member 176 that is rectangular in shape is included. The first plate member 172 and the second plate member 176 are vertically coupled on the same plane to form a T shape.

In addition, the third plate 170 includes first to third module mounting parts 173, 174, and 177 to mount at least one battery module.

The arrangement directions of the battery modules (not shown) respectively fixed to the first and second module mounting parts 173 and 174 are different from each other, and are fixed to the second module mounting part 174 and the third module mounting part 177, respectively. The arrangement direction of the battery module is the same. More detailed descriptions of the second plate 140 and the third plate 170 will be described later.

The first plate 110 corresponds to the third plate member 112 corresponding to the first plate member 172 of the third plate 170 and the second plate member 176 of the third plate 170. And a fourth plate member 116, and the third plate member 112 and the fourth plate member 116 are vertically coupled on the same plane to form a T shape.

Since the first plate 110 is directly coupled to the vehicle frame and serves to support the battery module, the first plate 110 has a thickness thicker than that of the second and third plates 140 and 170.

3 is a perspective view schematically showing a structure of a second plate of a battery pack base plate according to an embodiment of the present invention.

Referring to FIG. 3, unlike the first and third plates 110 and 170, the second plate 140 is formed of one T-shaped plate member. This is because the second plate 140 is combined with the pack cover to seal the battery module, so as to eliminate voids through which external materials can penetrate. In addition, since the second plate 140 is formed to be relatively thinner than the first plate 110, the second plate 140 may be easily manufactured in one unit.

In order to improve the strength, the second plate 140 includes island-type beads having a downward indentation structure corresponding to island-type beads 111 of upwardly projecting structure formed on the first plate 110 illustrated in FIG. 1. 141 is formed.

The island-shaped bead 141 of the second plate 140 has a fixing hole 149 for the cooling member. The fixing hole for the cooling member is not necessarily formed on all island-type beads 141 of the second plate 140, and may vary depending on the design of the structure.

Referring to FIG. 2 again, the fixing hole 149 for the cooling member formed on the second plate 140 corresponds to the position of the fastening protrusion 179 formed on the first plate 110. Accordingly, the cooling member may be coupled to the cooling member through the fixing hole 149 and the fastening protrusion 179 through the coupling member.

As described above, the second plate 140 has a sealing portion formed along the outer periphery of the upper surface. This seal includes a sealing gasket 146 interposed at the interface with the pack cover (not shown). The sealing gasket 146 may be formed of a rubber material, and serves as a rubber packing.

In addition, the sealing portion is formed with an outer circumferential protrusion 144 protruding upward at a predetermined height and width, so that a step is formed inside the sealing portion and by a predetermined height. Accordingly, the third plate 170 described above is in close contact with the inner side of the outer protrusion 144 to be seated. In addition, the third plate 170 is formed at a height that can be fitted corresponding to the height of the outer circumferential protrusion 144.

In addition, the second fixing holes 147 are formed in the second plate 140 to be fixed to the external device together with the first plate 110. The second fixing holes 147 are spaced apart from the wing portions 148 extending in the outward direction of the sealing portion. Moreover, it is spaced apart along the periphery of a sealing part in the outer direction of a sealing part.

Figure 4 is a perspective view schematically showing the structure of a third plate of the base plate for a battery pack according to an embodiment of the present invention.

Referring to FIG. 4, the third plate 170 extends in a first direction and is rectangular in planar shape with a first plate-shaped member 172 extending in a second direction perpendicular to the first direction and in planar shape. And a second plate-shaped member 176 that is rectangular in shape, and the first plate-shaped member 172 and the second plate-shaped member 176 are vertically coupled on the same plane to form a T-shape.

In order for the first plate member 172 and the second plate member 176 to be coupled to each other to form a T-shape, the first plate member 172 extends in the first direction, and the second plate member 176 is It extends in a second direction.

Accordingly, the first plate member 172 and the second plate member 176 may be formed in different widths based on the longitudinal direction of the vehicle, or may be formed in a state in which the rectangular plate members having different widths are coupled to each other. .

The third plate 170 includes first to third module mounts 173, 174, and 177. The arrangement directions of the battery modules fixed to the first and second module mounting units 173 and 174 are different from each other, and the arrangement directions of the battery modules mounted to the second module mounting unit 174 and the third module mounting unit 177, respectively. Are the same as each other.

The first plate member 172 of the third plate 170 includes a pair of first module mounting parts 173 positioned opposite to both sides in the first direction. In addition, the second module mounting unit 174 is disposed between the first module mounting units 173 and has a battery module orientation different from that of the battery module of the first module mounting unit 173. That is, the pair of first module mounting parts 173 are symmetrically positioned at both sides of the first plate member 172, and a second module mounting part 174 is formed between the first module mounting parts 173. .

5 is a perspective view schematically illustrating a state in which a fixing member is coupled to a third plate of a battery pack base plate according to an embodiment of the present invention.

Referring to FIG. 5, first fixing members 185a, 185b, 185c, and 185d for fixing the battery modules are coupled to the third plate 170. The first fixing members 185a, 185b, 185c, and 185d are types of end plates for fixing the battery modules on the third plate 170 by closely contacting each other at both ends.

6 is an exploded perspective view showing a state in which a cooling member is mounted on a base plate for a battery pack according to an embodiment of the present invention.

Referring to FIG. 6, the cooling member may include heat sinks 190a, 190b, 190c, and 190d formed in a shape corresponding to the first to third module mounts 173, 174, and 177, and such a heat sink. The fields 190a, 190b, 190c, and 190d are configured with cooling passages 192a and 192b for supplying a refrigerant.

The heat sinks 190a, 190b, 190c, and 190d are each formed in a hollow plate-like structure, and a coupling in which a coupling member for fixing to the first and second plates 110 and 140 may be inserted at an outer periphery thereof. Holes are formed.

7 is a perspective view showing a state in which a battery module is mounted on a base plate for a battery pack according to an embodiment of the present invention.

5 and 7 together, a plurality of battery modules 194, 195, 196, and 197 arranged in different directions are mounted on a base plate. The plurality of battery modules 194, 195, 196, and 197 are fixed in the vertical direction through the aforementioned first fixing members 190a, 190b, 190c, and 190d, and a second fixing member 184, which is a kind of bracket. do.

Battery modules 194 and 195 are arranged in a line in the second direction in the first module mounting part 173, and battery modules 196 and 197 in the second module mounting part 174 and the third module mounting part 177. It is arranged in a line in the first direction. As a result, the battery modules 194, 195, 196, and 197 are arranged in different first and second directions.

8 is a perspective view illustrating a battery pack in a state where the battery pack base plate and the pack cover are coupled according to an embodiment of the present invention. Referring to FIG. 8, a pack cover 198 may be coupled to an upper portion of the base plate 100 for a battery pack having a three-layered laminated structure according to an embodiment of the present invention to completely seal the inside thereof, and to the outside in all directions. It is possible to prevent the substance from penetrating.

Those skilled in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above contents.

Claims (19)

A base plate is mounted on the plurality of battery modules and coupled to the pack cover to form a battery pack,
A first plate fixed to the external device and supporting the load of the battery modules;
A second plate positioned on the first plate and having a sealing portion coupled to the pack cover to seal the battery modules from the outside; And
A third plate positioned on the second plate and provided with at least one module mounting unit for mounting the battery module;
It contains,
The third plate,
A first plate member extending in the first direction and rectangular in planar shape; And
A second plate member extending in a second vertical direction in the first direction and rectangular in planar shape;
It contains,
The first plate member and the second plate member are vertically coupled on the same plane to form a T shape.
The first plate,
A third plate member corresponding to the first plate member of the third plate; And
A fourth plate member corresponding to the second plate member of the third plate;
It contains,
The third plate member and the fourth plate member are vertically coupled on the same plane to form a T shape.
The second plate is provided between the first plate and the third plate, and protects the battery module from foreign matter flowing between the third plate member and the fourth plate member of the first plate,
The first plate, the second plate and the third plate is made of a structure that is closely stacked in the vertical direction,
On the outer circumferential surface of the first plate are first fixing holes for coupling with the external device,
The second plate has a wing portion extending in the outward direction of the sealing portion, the wing portion is formed with a second fixing hole,
The sealing portion of the second plate,
An outer periphery projecting upwardly at a predetermined height and width along an outer periphery of the second plate upper surface; And
A sealing gasket interposed at an interface with the pack cover when the pack cover is coupled to the outer protrusion;
It is configured to include,
The outer circumferential portion of the outer circumferential end of the third plate is fixed in close contact,
The first plate and the second plate is a base plate for a battery pack, characterized in that fixed to the device on which the battery pack is mounted through a fastening member passing through the first fixing holes and the second fixing holes.
delete The method of claim 1, wherein the module mounting portion of the third plate has a frame structure in which an opening is formed in the center while supporting the outer peripheral lower end of the battery module, one battery module or two or more batteries in one module mounting portion Base plate for a battery pack, characterized in that the modules are mounted. 2. The battery module of claim 1, wherein the first plate member includes a pair of first module mounting parts positioned opposite to both sides in a first direction, and positioned between the first module mounting parts. Base plate for a battery pack comprising a second module mounting portion of a different battery module orientation. The base plate for a battery pack according to claim 4, wherein the second plate member of the third plate includes a third module mounting portion having the same battery module orientation as the second module mounting portion. The battery pack base plate according to claim 1, wherein the third plate is provided with fastening protrusions protruding upward for mounting and fixing the battery module. The battery pack base plate of claim 1, wherein island-type beads are formed in an upwardly protruding structure or a downwardly indenting structure in the first plate and the second plate, respectively. The method of claim 7, wherein the first plate is formed of island-like beads of the upward protrusion structure, the second plate is formed of island-type beads of the indent downward structure, the island-shaped beads of the first plate A base plate for a battery pack, characterized by facing two islands of bead-type beads. delete delete delete The method of claim 1,
A pair of outwardly protruding first fastening portions are formed at an end portion of the second plate-shaped member that is coupled to the first plate-shaped member,
The first plate-shaped member has second fastening portions of the downward indentation type formed at positions corresponding to the first fastening portions,
The base plate for the battery pack, characterized in that the first coupling parts are coupled to each other by spot welding in a state in which the second coupling parts are accommodated.
delete The base plate for a battery pack according to claim 1, wherein the material of the first plate is relatively rigid than the material of the third plate.
delete The method of claim 1,
The fixing holes of the first plate is a battery pack base plate, characterized in that formed on the island-shaped bead of the upward protrusion structure. The battery pack base plate of claim 1, wherein the third plate is provided with at least one stud bolt on which a control member for controlling the operation of the battery modules is mounted and fixed. The battery module is mounted on the base plate according to any one of claims 1, 3 to 8, 12, 14, 16 and 17 and the pack cover is coupled Battery pack made with. A device comprising a battery pack according to claim 18 is mounted.

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