KR102097083B1 - Battery pack case and battery pack including the battery pack case, car - Google Patents

Abstract

The present invention relates to a battery pack case, a battery pack including the same, and a vehicle. The battery pack according to an embodiment of the present invention is a battery pack case including an upper body and a lower body that are combined with each other to form an accommodation space therein, and one or a plurality of battery modules disposed in the accommodation space and having a plurality of secondary batteries The lower body includes a first lower body having a portion of the receiving space therein, a second lower body having a portion of the receiving space therein, and a connecting body connecting the first lower body and the second lower body. The lower surface of the connecting body includes a battery pack protruding upward and having a through hole formed along its longitudinal direction.

Description

Battery pack case and battery pack including the same, car {Battery pack case and battery pack including the battery pack case, car}

The present invention relates to a battery pack case accommodating a battery module having one or more secondary cells, a battery pack including the same, and a vehicle.

Currently commercially available secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and lithium secondary batteries. Lithium secondary batteries have less memory effect than nickel-based secondary batteries, so they are free to charge and discharge. In addition, lithium secondary batteries are in the spotlight for their advantages of very low self-discharge rate and high energy density.

Lithium secondary batteries mainly use lithium-based oxide and carbon materials as a positive electrode active material and a negative electrode active material, respectively. The lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with a positive electrode active material and a negative electrode active material are disposed with a separator interposed therebetween, and an exterior material for sealingly storing the electrode assembly together with an electrolyte.

In general, lithium secondary batteries may be classified into can-type secondary batteries and pouch-type secondary batteries according to types of exterior materials. In the can-type secondary battery, the electrode assembly is embedded in a metal can. In the pouch type secondary battery, the electrode assembly is embedded in a pouch of an aluminum laminate sheet.

Recently, secondary batteries are widely used not only in small devices such as portable electronic devices, but also in medium and large devices such as automobiles and power storage devices. When used in such medium-to-large-sized devices, a large number of secondary cells are electrically connected to increase capacity and output. Particularly, a pouch-type secondary battery that is easily stacked is frequently used in such medium-to-large-sized devices.

Meanwhile, in the battery pack, one or more battery modules having secondary cells are accommodated in the battery pack case. The battery pack case is generally provided in a shape having a rectangular parallelepiped shape having a space therein. When the battery pack is installed in a medium- or large-sized device such as a vehicle, many parts other than the battery pack are installed in a limited space. In such a limited space, when an automobile part, a gear device, an electric component, or the like, passes through a space in which a battery pack is installed, there is a case where the battery pack case is in contact with or collides with, which may cause installation problems.

The present invention is to provide a battery pack case and a battery pack including the battery pack case and the vehicle that can be easily combined with other parts in the vehicle.

In addition, the present invention is to provide a battery pack case and a battery pack including the same and a battery pack that can stably support other parts of the vehicle and stably protect a battery module having a secondary battery.

The present invention is not limited to this, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention provides a battery pack having a secondary battery.

According to an embodiment of the present invention, the battery pack is placed in the housing space and the battery pack case including the upper body and the lower body to form a receiving space therein in combination with each other, one or a plurality of secondary batteries Battery module; The lower body includes a first lower body having a portion of the receiving space therein, a second lower body having a portion of the receiving space therein, and a connecting body connecting the first lower body and the second lower body. The lower surface of the connecting body may protrude upward and a through hole may be formed along the longitudinal direction.

According to one embodiment, the through-hole may have a cross-section that is formed in an arc shape.

According to one embodiment, the upper surface of the connecting body may be provided as a flat surface.

According to an embodiment, a portion of the connection body located in the accommodation space is provided in an arc shape in cross section, and may include a plurality of ribs on its outer circumferential surface.

According to an embodiment, a coupling hole in which a part of the automobile part is coupled may be formed on one of the surfaces facing the outside of the connection body.

According to one embodiment, the connecting body is located in the accommodation space and may further include a plurality of coupling parts that are coupled to the vehicle parts.

According to an embodiment, when the first lower body, the second lower body and the connecting body are combined with each other and viewed from the top, the lower body has a rectangular shape and the lower body is vertically coupled to the first surface and the first surface. A fourth surface parallel to the second surface and the first surface, a third surface perpendicular to the second surface, and a fourth surface parallel to the second surface and perpendicular to the first surface and the third surface. Including a surface, the third surface may be provided with a higher height than the first surface.

The present invention provides a battery pack case having a space for receiving one or a plurality of battery modules having a plurality of secondary cells therein.

According to an embodiment of the present invention, the battery pack case is located on the upper body and the lower portion of the upper body and includes a lower body that is combined with the upper body to form a receiving space therein, but the lower body is a part of the receiving space therein. It includes a first lower body having a second lower body having a portion of the receiving space therein and a connecting body connecting the first lower body and the second lower body, but the lower surface of the connecting body protrudes upwards to the longitudinal direction. A through hole may be formed along.

According to one embodiment, the through-hole may have a cross-section that is formed in an arc shape.

According to one embodiment, the upper surface of the connecting body may be provided as a flat surface.

According to an embodiment, a portion of the connection body located in the accommodation space is provided in an arc shape in cross section, and may include a plurality of ribs on its outer circumferential surface.

According to an embodiment, a coupling hole in which a part of the automobile part is coupled may be formed on one of the surfaces facing the outside of the connection body.

According to one embodiment, the connecting body is located in the accommodation space and may further include a plurality of coupling parts that are coupled to the vehicle parts.

In addition, the present invention provides a vehicle including any one of the battery pack.

According to an embodiment of the present invention, it is possible to efficiently use the installation space of the battery pack by providing various shapes of the battery pack case.

In addition, according to an embodiment of the present invention, other parts of the vehicle can pass through the through-hole formed in the battery pack case, so it is easy to install the battery pack and other parts.

In addition, according to an embodiment of the present invention, the through hole formed in the battery pack case has an arch structure, and a plurality of ribs are provided on the outer circumferential surface to facilitate the installation of the battery pack while also improving the durability of the battery pack case. .

The effects of the present invention are not limited to the above-mentioned effects, and the effects not mentioned will be clearly understood by those skilled in the art from the present specification and the accompanying drawings.

1 is a perspective view showing a battery pack according to an embodiment of the present invention.
2 is an exploded perspective view showing a battery pack case according to an embodiment of the present invention.
3 is a perspective view showing the lower body of FIG. 2.
4 is a plan view of the lower body of FIG. 3.
5 is a front view of the lower body of FIG. 3.
6 is a side view of the lower body of FIG. 3.
7 is an enlarged perspective view showing the connector of FIG. 3.
8 to 10 are views showing a connection body according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the following embodiments. This embodiment is provided to more fully describe the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings may be exaggerated to emphasize a more clear description. In addition, the terms or words used in the specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor appropriately defines the concept of terms in order to describe his or her invention in the best way. Based on the principle that it can be done, it should be interpreted as a meaning and a concept consistent with the technical idea of the present invention.

1 is a perspective view showing a battery pack 1 according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing a battery pack case 10 according to an embodiment of the present invention.

Hereinafter, referring to FIGS. 1 and 2, the battery pack 1 may include a plurality of battery modules having a plurality of battery cells. The battery pack 1 may be provided in an automobile or a power storage device. The battery pack 1 includes a battery pack case 10 and a battery module (not shown).

The battery pack case 10 may accommodate a battery module therein. The battery pack case 10 includes an upper body 100 and a lower body 200.

The upper body 100 protects the battery module from external shock or vibration. Upper body 100 has a generally rectangular shape when viewed from the top. The upper body 100 has a space therein, and may be provided in a rectangular parallelepiped shape. The inner space of the upper body 100 is combined with the lower body 200 to be described later to form a receiving space 101 therein. A battery module, which will be described later, may be placed in the accommodation space 101.

3 is a perspective view showing the lower body 200 of FIG. 2, FIG. 4 is a plan view of the lower body 200 of FIG. 3, FIG. 5 is a front view of the lower body 200 of FIG. 3, and FIG. 6 is a lower body of FIG. 3 It is a side view of 200.

Hereinafter, referring to FIGS. 3 to 6, the lower body 200 protects the battery module from external shock or vibration. The lower body 200 is located under the upper body 100. The lower body 200 has a generally rectangular shape when viewed from the top. The lower body 200 has a space therein. The inner space of the lower body 200 is combined with the inner space of the upper body 100 to form the receiving space 101. The lower body 200 has four outer surfaces. The four outer surfaces are the first surface 201, the second surface 202, the third surface 203, and the fourth surface 204. Here, the direction in which the second surface 202 and the fourth surface 204 are disposed is referred to as a first direction 12. When viewed from the top, a direction perpendicular to the first direction 12 is referred to as a second direction 14. The direction perpendicular to both the first direction 12 and the second direction 14 is called a third direction 16.

The first surface 201 is provided in its longitudinal direction along the first direction 12. The second surface 202 is vertically coupled to the first surface 201. The second side 202 is provided in its longitudinal direction along the second direction 14. The third surface 203 is provided parallel to the first surface 201. The third surface 203 is vertically coupled to the second surface 202. The fourth side 204 is provided parallel to the second side 202. The fourth surface 204 is vertically coupled to the first surface 201 and the third surface 203.

The third surface 203 is provided with a height higher than that of the first surface 201. The height of the second surface 202 and the fourth surface 204 may be gradually increased along a direction from the first surface 201 to the third surface 203. Unlike this, as shown in FIG. 10, the first surface 201c and the third surface 203c may be provided at the same height. Optionally, the heights of the first surface 201, the second surface 202, the third surface 203, and the fourth surface 204 may all be provided differently or only partially.

The lower body 200 includes a first lower body 210, a second lower body 230, and a connecting body 250. The first lower body 210 has a portion of the receiving space 101 therein. The battery module may be accommodated in the accommodation space 101 of the first lower body 210.

The second lower body 230 is disposed along the first lower body 210 and the first direction 12. The second lower body 230 has a portion of the receiving space 101 therein. The battery module may be accommodated in the accommodation space 101 of the second lower body 230.

The connecting body 250 connects the first lower body 210 and the second lower body 230. The first lower body 210, the connecting body 250, and the second lower body 230 are sequentially arranged along the first direction 12. The connecting body 250 is located in the central region of the lower body 200. The lower surface of the connecting body 250 is provided to protrude upward. The lower surface of the connecting body 250 protrudes toward the third direction 16.

The lower surface of the connecting body 250 protrudes upward to form a through hole 251 in the lower portion. The through-hole 251 is provided in its longitudinal direction along the second direction 14. The through-hole 251 may be provided in a substantially arcuate cross section. Automotive parts may be placed in the interior space of the through hole 251. For example, an exhaust pipe or a gear or a power transmission shaft for transmitting driving force may be placed. Alternatively, other parts can be placed.

Unlike the above-described example, as shown in FIG. 8, the through-hole 251a of the connecting body 250a may be provided in a trapezoidal shape in cross section. Unlike this, as shown in FIG. 9, a plurality of through holes 251b of the connection body 250b may be provided as illustrated in FIG. 9. In this case, the cross section of each through hole 251b may be provided identically or differently. Optionally, the through-hole 251 may be provided in various shapes other than an arch shape or a trapezoid shape.

The upper surface 252 of the connector 250 may be provided as a flat surface. The upper surface 252 of the connecting body 250 is provided as a flat surface, and a BMS (Battery Management System) or other electric components can be easily coupled to the upper portion. As described above, when the upper surface 252 of the connection body 250 is provided as a flat surface, a space for accommodating parts such as BMS may be more secured.

The portion of the connecting body 250 located inside the receiving space 101 is provided with an arc shape in its cross section. The portion of the connecting body 250 located in the receiving space 101 inside has a plurality of ribs 253 on its outer circumferential surface. The plurality of ribs 253 may be provided in a semi-circular shape in cross section. The plurality of ribs 253 are spaced apart from each other at regular intervals. The plurality of ribs 253 are positioned along the second direction 14.

The connector 250 includes a coupling portion 257. The coupling portion 257 is coupled to the automobile part. The coupling part 257 is located in the connecting body 250 located in the receiving space 101. For example, the coupling portion 257 has a coupling hole therein, and may be provided in plural. The coupling part 257 may couple the automobile part and the connection body 250 positioned above the connection body 250. The number and position of the coupling parts 257 may be provided differently depending on the parts to be coupled.

One of the surfaces facing the outside of the connection body 250 is formed with a coupling hole 259 to which a part of an automobile part is coupled. The coupling hole 259 may be provided in an area included in the third surface 203 of the connection body 250. The coupling hole 259 may be provided in a rectangular shape. Unlike this, the engagement hole 259 may be provided in various shapes according to the shape of the component to be joined. For example, a connector or cable for connecting a BMS installed inside the battery pack case 10 or other electric components and another part located outside the battery pack case 10 may be inserted into the coupling hole 259. have. Unlike this, the engagement hole 259 may simply provide a space for a part of an automobile part to be inserted.

The battery module (not shown) may be configured to include a plurality of battery cells. The battery cell may be a pouch type battery cell.

The pouch-type battery cell includes an electrode assembly, an electrolyte solution, and a pouch exterior material. The electrode assembly is an assembly of electrodes and separators. For example, the electrode assembly may include one or a plurality of positive electrode plates and one or more negative electrode plates with a separator interposed therebetween.

Each electrode plate of the electrode assembly is provided with an electrode tab. An electrode lead may be connected to each electrode tab. The electrode leads are interposed between the pouch exterior materials. One end of the electrode lead is exposed to the outside, and the other end may be located inside the pouch case. The portion exposed to the outside of the electrode lead may function as an electrode terminal of the battery cell.

The pouch exterior material has an interior space. The electrode assembly and the electrolyte may be accommodated in the interior space. The edge of the pouch case is sealed. For example, the edge portion may be sealed in a heat-sealed manner.

The pouch exterior material may include a left pouch and a right pouch. The left pouch and the right pouch have an outer insulating layer, a metal layer, and an inner adhesive layer, so that the inner adhesive layers can be fused together.

Since the configuration of the secondary battery described above is a matter obvious to those skilled in the art to which the present invention pertains, a more detailed description is omitted. Various secondary cells known at the time of filing of the present invention may be applied to a battery module according to an embodiment of the present invention.

The present invention described above provides a through hole 251 in the shape of an arch to the connecting body 250, and thus, when installing the battery pack 1, exhaust pipes, gears, etc. among automobile parts can be placed in the through hole 251, thereby providing a limited space. It is easy to install several parts. In addition, a component coupled to the upper portion of the connecting body 250 can be stably supported through the connecting body 250 having an arc shape having a plurality of ribs 253. In addition, it is possible to provide a structurally stable lower body 200 through a plurality of ribs 253 provided on the connecting body 250. In addition, the shape of the connecting body 250 can be provided in various shapes such as a trapezoid as well as an arch shape, and thus may be provided differently depending on parts passing through the through-hole 251. In addition, when multiple parts need to penetrate the battery pack 1, it is easy to install multiple parts in a limited space by providing a plurality of connectors 250.

The above detailed description is to illustrate the present invention. In addition, the above-described content is to describe and describe preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications and environments. That is, it is possible to change or modify the scope of the concept of the invention disclosed herein, the scope equivalent to the disclosed contents, and / or the scope of the art or knowledge in the art. The embodiments described describe the best state for implementing the technical idea of the present invention, and various changes required in specific application fields and uses of the present invention are possible. Accordingly, the detailed description of the invention is not intended to limit the invention to the disclosed embodiments. In addition, the appended claims should be construed to include other embodiments.

1: Battery pack 10: Battery pack case
100: upper body 200: lower body
210: first lower body 230: second lower body
250: connector 251: through hole
253: rib 257: joint
259: coupling hole 101: accommodation space

Claims (14)

In the battery pack,
A battery pack case including an upper body and a lower body that are combined with each other to form an accommodation space therein;
A battery module disposed in the accommodation space and having a plurality of secondary batteries; Including,
The lower body,
A first lower body having a part of the accommodation space therein;
A second lower body having a part of the accommodation space therein; And
A connecting body connecting the first lower body and the second lower body; Including,
A battery pack having a lower surface of the connecting body protruding upward to have an internal space in which an automobile part can be placed, extending along the longitudinal direction, and forming through holes with both ends of the longitudinal direction open to the outside.
According to claim 1,
The through hole is a battery pack whose cross section is formed in an arch shape.
According to claim 2,
The battery pack provided on the upper surface of the connecting body is a flat surface.
According to claim 2,
A battery pack including a plurality of ribs on the outer circumferential surface of the connecting portion, which is located in the accommodation space, is provided in an arc shape in cross section.
According to claim 4,
A battery pack in which one of the surfaces facing the outside of the connection body is formed with a coupling hole through which a part of the automobile part is coupled.
According to claim 4,
The connection body is located in the accommodation space and further includes a plurality of coupling parts coupled to the vehicle parts.
According to claim 4,
The first lower body, the second lower body and the connecting body are combined with each other and have a rectangular shape when viewed from the top,
The lower body,
The first side;
A second surface vertically coupled to the first surface;
A third surface parallel to the first surface and vertically coupled to the second surface; And
A fourth surface parallel to the second surface and vertically coupled to the first surface and the third surface; Including,
The third side is a battery pack that is provided with a higher height than the first side.
In the battery pack case having a space for receiving one or a plurality of battery modules having a plurality of secondary cells therein,
Upper body;
A lower body located at the lower portion of the upper body and combined with the upper body to form a receiving space therein; Including,
The lower body
The first lower body having a part of the accommodation space therein and
A second lower body having some of the accommodation space therein, and
It includes a connecting body connecting the first lower body and the second lower body,
A battery pack case in which a lower surface of the connecting body protrudes upward to have an interior space in which an automobile part can be placed and extends along the longitudinal direction and through holes in which both ends of the longitudinal direction are opened to the outside.
The method of claim 8,
The through hole is a battery pack case whose cross section is formed in an arch shape.
The method of claim 9,
The battery pack case is provided on the upper surface of the connector as a flat surface.
The method of claim 9,
A battery pack case including a plurality of ribs on the outer circumferential surface of the connecting portion, which is located in the accommodation space, is provided in an arc shape in cross section.
The method of claim 11,
A battery pack case in which one of the surfaces facing the outside of the connection body is formed with a coupling hole in which a part of the automobile part is coupled.
The method of claim 11,
The connection body is located in the accommodation space and further includes a plurality of coupling parts that are coupled to the vehicle parts.
A vehicle comprising the battery pack according to any one of claims 1 to 7.

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