KR102080902B1 - Battery module and battery pack including the same - Google Patents

Abstract

Disclosed are a battery module and a battery pack including the same. A battery module according to an embodiment of the present invention includes a cell cover surrounding a battery cell and having a protrusion formed therein; A support member supporting the cell cover and having an insertion hole into which the protrusion is inserted; And a heat dissipation member disposed close to the protrusion of the cell cover and dissipating heat generated from the battery cell.

Description

BATTERY MODULE AND BATTERY PACK INCLUDING THE SAME}

The present invention relates to a battery module and a battery pack including the same, and more particularly, a battery module including heat and heat generated from the battery cell is directly transferred from the cell cover to the heat dissipation member to improve the cooling efficiency, and including the same. Relates to a battery pack.

As the development and demand for mobile devices increases, the demand for secondary batteries is rapidly increasing, and nickel cadmium or hydrogen ion batteries have been used as secondary batteries. Is hardly generated, and thus, a rechargeable secondary battery is freely charged, a very low self discharge rate, and a high energy density lithium secondary battery.

Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as positive electrode active materials and negative electrode active materials, respectively. The lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with such a positive electrode active material and a negative electrode active material are disposed with a separator interposed therebetween, and a packaging material that seals the electrode assembly together with an electrolyte, that is, a battery case.

A lithium secondary battery is composed of a positive electrode, a negative electrode, a separator and an electrolyte interposed therebetween, and a lithium ion battery (LIB) and a lithium polymer battery according to which of the positive electrode active material and the negative electrode active material are used. , PLIB) and the like. Usually, the electrode of these lithium secondary batteries is formed by apply | coating a positive electrode or negative electrode active material to an electrical power collector, such as an aluminum or copper sheet, a mesh, a film, a foil, and drying.

Figure 1 (a) is a plan view of the cooling plate coupled to the cell cover in the conventional battery module, Figure 1 (b) is a side view of a cell cover provided with a battery cell in the conventional battery module, Figure 2 is a conventional battery module Is a cross-sectional view of a plurality of cell covers coupled to the cooling plate.

Referring to FIG. 1 (a), the cooling plate 10 of the battery module of the conventional secondary battery is completely blocked. Referring to FIG. 1 (b), the cell cover 20 of the battery module of the conventional secondary battery is illustrated. The lower end of the flat is provided, and referring to Figure 2, the flat lower portion of the cell cover 20, the battery cell 30 is provided therein is coupled to the cooling plate 10 in contact. Here, the cooling plate 10 is in contact with the thermal pad 40 and the heat dissipation member 50 is disposed below the thermal pad 40. That is, the heat generated from the battery cell 30 is transferred to the cooling plate 10 through the cell cover 20, the heat transferred to the cooling plate 10 through the thermal pad 40, the heat radiating member 50 Heat dissipation by

However, in the related art, after the heat generated from the battery cell 30 is transferred to the thermal pad 40 through the cooling plate 10 through the cell cover 20, the heat radiating member 50 from the thermal pad 40. The heat transfer is carried out through the various steps as described above, and thus the cooling efficiency is low.

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Accordingly, an object of the present invention is to provide a battery module and a battery pack including the same, in which heat generated from a battery cell is transferred directly from a cell cover to a heat radiating member, thereby improving cooling efficiency.

In addition, since the heat is transferred directly from the cell cover to the heat dissipation member as well as through the support member to provide a battery module and a battery pack including the same can increase the heat transfer efficiency.

According to an aspect of the invention, the cell cover surrounding the battery cell is formed with a protrusion; A support member supporting the cell cover and having an insertion hole into which the protrusion is inserted; And a heat dissipation member disposed near the protrusion of the cell cover and dissipating heat generated from the battery cell.

In addition, the cell cover may be provided with a metal material.

The protrusion may be formed of a plurality of protrusions, and the support member may include a plurality of insertion holes in which the plurality of protrusions may be inserted, and the cell cover may be disposed between the plurality of insertion holes of the support member. An intermediate support part may be formed in contact to support the cell cover.

The apparatus may further include a thermal pad in contact with the protrusion for transferring heat generated from the battery cell.

When the protrusion of the cell cover is inserted into the insertion hole of the support member, the protrusion and the support member are positioned on the same horizontal line or another horizontal line, and both the protrusion and the support member may be in contact with the thermal pad. Can be.

In addition, the heat radiating member may be in contact with the thermal pad.

The support member may be provided as a cooling plate for cooling the battery cell.

Meanwhile, according to another aspect of the present invention, a battery pack including the battery module described above may be provided, and an automobile including the battery module may be provided.

Embodiments of the present invention, since the heat generated from the battery cell is transferred directly from the cell cover to the heat radiating member, there is an effect that the cooling efficiency can be improved than when the heat transfer through the cooling plate.

In addition, since heat is transferred directly from the cell cover to the heat dissipation member as well as through the support member, heat transfer is performed at various sites, thereby increasing heat transfer efficiency.

Figure 1 (a) is a plan view of the cooling plate coupled to the cell cover in the conventional battery module, Figure 1 (b) is a side view of a cell cover provided with a battery cell in the conventional battery module.
2 is a cross-sectional view of a plurality of cell covers coupled to a cooling plate in a conventional battery module.
3 is a schematic separated side view of a battery module according to an embodiment of the present invention.
4 is a plan view of a support member in a battery module according to an embodiment of the present invention.
5 is a schematic side view coupling of the battery module according to an embodiment of the present invention.
6 is a cross-sectional view of a cell cover coupled to a support member in a battery module according to an embodiment of the present invention.
7 is a view showing a bottom surface of the cell cover coupled to the support member in the battery module according to an embodiment of the present invention.

Hereinafter, a battery module and a battery pack including the same according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The terms or words used in this specification and claims are not to be construed as being limited to the common or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best describe their invention. It should be interpreted as meanings and concepts corresponding to the technical idea of the present invention based on the principle that the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

In the drawings, the size of each component or a specific portion constituting the components is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. Thus, the size of each component does not entirely reflect its actual size. If it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, such description will be omitted.

As used herein, the term 'coupling' or 'connection' refers to a case in which one member and another member are directly bonded or directly connected, as well as one member being indirectly coupled to another member through a joint member, or indirectly. It also includes the case where it is connected.

Figure 3 is a schematic separation side view of the battery module according to an embodiment of the present invention, Figure 4 is a plan view of the support member in the battery module according to an embodiment of the present invention, Figure 5 is an embodiment of the present invention Figure 6 is a schematic side view of the combination of the battery module, Figure 6 is a cross-sectional view of the cell cover 100 is coupled to the support member in the battery module according to an embodiment of the present invention, Figure 7 is an embodiment of the present invention In the battery module according to the figure is a view showing the bottom surface of the cell cover 100 is coupled to the support member.

3 and 6, the cell cover 100 surrounds at least a part of the outside of the battery cell 300 to protect the battery cell 300. The cell cover 100 may be provided to surround one or more battery cells 300. That is, referring to FIG. 6, for example, two battery cells 300 are inserted into one cell cover 100, and six cell covers 100 cover 12 battery cells 300, respectively. . However, this is one embodiment, and the number of battery cells 300 covered by the cell cover 100 is not limited thereto. Here, the battery cell 300 is preferably a pouch type battery cell, but is not limited thereto. Meanwhile, the electrode lead 310 is provided in the battery cell 300, and the electrode lead 310 of the battery cell 300 may be configured to be exposed to the outside of the cell cover 100. In addition, the battery cells 300 may be stacked side by side such that the electrode leads 310 are exposed in the same direction.

The cell cover 100 may be formed of a metal material to protect the battery cell 300 therein and have good thermal conductivity. For example, the cell cover 100 may be made of a material having high thermal conductivity such as aluminum to transfer heat generated from the battery cell 300 to another cooling medium, as well as the battery cell from external force due to the rigidity of aluminum. 300 may be protected. However, the material of the cell cover 100 is not limited to aluminum, and the rigidity enough to protect the battery cell 300 and the heat sufficient to easily transfer heat generated from the battery cell 300. It is obvious that various materials may be employed as long as they have conductivity.

3 and 5, the cell cover 100 may have a substantially rectangular parallelepiped shape and may be configured to be stacked along a wide surface of the rectangular parallelepiped shape. That is, the cell cover 100 may be stacked in a state surrounding the battery cell 300.

On the other hand, referring to Figure 3, the cell cover 100 is formed with a protrusion 110. The protrusion 110 of the cell cover 100 is inserted into the insertion hole 210 of the support member 200, whereby the heat dissipation member 500 may be disposed close to the protrusion 110. That is, since heat generated from the battery cell 300 is directly transferred to the thermal pad 400 or the heat dissipation member 500 through the protrusion 110 of the cell cover 100, the heat transfer efficiency may be improved. For example, if the thermal pad 400 is not provided, heat may be transferred directly from the protrusion 110 to the heat dissipation member 500. If the thermal pad 400 is provided, the heat from the protrusion 110 may be applied. Heat may be transferred to the heat radiating member 500 via the pad 400. The protrusion 110 may be formed of a plurality of protrusions. In this case, the insertion hole 210 of the support member 200 may be formed in a number corresponding to the number of the plurality of protrusions so that the plurality of protrusions may be inserted. Can be. That is, for example, if the protrusion 110 is formed of two protrusions, two insertion holes 210 into which the protrusions are inserted may also be formed.

3 and 4, the support member 200 supports the cell cover 100. For example, the plurality of cell covers 100 are stacked and coupled to the support member 200, and the support member 200 supports the upper cell cover 100 from the lower side. When the plurality of cell covers 100 are stacked, the support member 200 has a space partitioned so that each cell cover 100 may be coupled (see FIGS. 4 and 6). In addition, an insertion hole 210 is formed in the support member 200, and when the cell cover 100 is coupled to the support member 200, the protrusion 110 of the cell cover 100 is inserted into the support member 200. It is inserted into the hole 210, whereby the protrusion 110 is directly exposed to the outside (see FIG. 7).

Since the support member 200 has to have a predetermined strength for supporting the cell cover 100, the support member 200 may be formed of a metal material, for example, aluminum, but various materials may be used. .

The support member 200 may not only support the cell cover 100 but also cool the battery cell 300 by dissipating heat generated from the battery cell 300. To this end, the support member 200 may be provided, for example, as a cooling plate. That is, heat generated from the battery cell 300 may be directly discharged to the outside through the protrusion 110 of the cell cover 100 directly exposed to the heat dissipation member 500, but is in contact with the cell cover 100. The support member 200, that is, may be released by heat conduction through the cooling plate. In this case, since the heat dissipation through the protrusion 110 and the heat dissipation through the support member 200 may be performed in the battery module according to the exemplary embodiment of the present disclosure, relative heat dissipation efficiency may be improved.

When the insertion hole 210 of the support member 200 is configured in plural, the intermediate support part 220 may be formed between the plurality of insertion holes 210. In this case, the protrusion 110 may be provided with a locking groove 111 (see FIG. 3) that may be caught by the intermediate support part 220 so that the locking groove 111 may be caught by the intermediate support part 220. The intermediate support part 220 contacts the cell cover 100 to support an approximately center portion of the cell cover 100. If the intermediate support part 220 is not formed, the support member 200 supports the cell cover 100 only at both ends thereof, so that a load acts in the direction of gravity in the center of the cell cover 100 so that the cell cover 100 operates. The central portion of the 100 may be deformed downward. In order to prevent deformation of the central portion of the cell cover 100, an intermediate support portion 220 may be formed between the plurality of insertion holes 210 of the support member 200.

The heat dissipation member 500 is disposed close to the protrusion 110 of the cell cover 100 and releases heat generated from the battery cell 300. The heat dissipation member 500 may be a heat sink or a cooler provided with a cooling fan. Here, when the protrusion 110 inserted into the insertion hole 210 of the support member 200 is exposed to the outside, a cooler having a cooling fan is disposed close to the protrusion 110 to cool the protrusion 110. have. In addition, when the thermal pad 400 to be described later is in contact with the protrusion 110, the heat sink is coupled to the thermal pad 400, and heat is transferred from the protrusion 110 to the thermal pad 400 through the heat sink. . Of course, the heat sink may include a structure that is radiated by a cooler or a cooling fluid for cooling.

3 and 5, the thermal pad 400 may contact the protrusion 110 to transfer heat generated from the battery cell 300. That is, heat generated from the battery cell 300 is transferred directly from the protrusion 110 to the thermal pad 400. In this case, since the heat dissipation member 500 is in contact with the thermal pad 400, heat from the battery cell 300 is discharged to the outside through the heat dissipation member 500 via the protrusion 110 and the thermal pad 400. .

The thermal pad 400 may be in contact with both the protrusion 110 and the support member 200. That is, as described above, the protrusion 110 may be in direct contact with the thermal pad 400 to perform heat transfer, and when the support member 200 is provided as a cooling plate, the cell cover 100 may be in contact with the cooling plate, thereby Heat of the cell 300 may be transferred from the cell cover 100 to the thermal pad 400 through a cooling plate. To this end, when the protrusion 110 of the cell cover 100 is inserted into the insertion hole 210 of the support member 200, the protrusion 110 and the support member 200 may be positioned on the same horizontal line. That is, when the protrusion 110 and the support member 200 are positioned on the same horizontal line, when the thermal pad 400 is in contact with the support member 200, the protruding portion 110 and the support member 200 may contact the protrusion 110 as well as the support member 200. It becomes possible. On the other hand, in consideration of processing errors, the protrusion 110 may be manufactured to protrude slightly more than the support member 200 after being inserted into the insertion hole 210, in this case, the protrusion 110 of the cell cover 100 ) Is inserted into the insertion hole 210 of the support member 200, the protrusion 110 and the support member 200 is located on a different horizontal line. That is, for example, when the protrusion 110 is formed under the cell cover 100 and the thermal pad 400 is coupled under the cell cover 100, the protrusion 110 is outside the insertion hole 210. When protruded into the protrusion 110 is projected slightly lower than the support member 200. As described above, even when the protrusion 110 and the support member 200 are positioned on different horizontal lines, the thermal pad 400 is elastic so that both the protrusion 110 and the support member 200 are in contact with the thermal pad 400. The branch may be provided in a rubber material. That is, even if the protrusion 110 protrudes more than the support member 200, the thermal pad 400 may be elastically deformed by the elastic force of the rubber material. Thus, the thermal pad 400 may have the protrusion 110 and the support member 200. ) Can be contacted by all.

Hereinafter, the operation and effects of the battery module according to an embodiment of the present invention will be described.

Referring to FIG. 3, the protrusion 110 is formed on the cell cover 100 surrounding the battery cell 300. Referring to FIG. 4, the protrusion 110 of the cell cover 100 is formed on the support member 200. An insertion hole 210 into which a hole may be inserted is formed, and referring to FIGS. 5 and 6, when the protrusion 110 of the cell cover 100 is inserted into the insertion hole 210 of the support member 200, the cell cover is inserted. 100 is supported by the support member 200, and also referring to FIG. 7, the protrusion 110 is exposed to the outside so that heat generated from the battery cell 300 may be directly discharged through the protrusion 110. Can be.

Here, for example, the thermal pad 400 may be coupled to the lower side of the support member 200, and in this case, the thermal pad 400 may not only support the support member 200 but also the protrusion of the cell cover 100. 110). In addition, for example, a heat dissipation member 500 such as a heat sink may be coupled to the thermal pad 400.

That is, since heat generated from the battery cell 300 is transferred to the thermal pad 400 through the protrusion 110 of the cell cover 100 and directly discharged to the outside through the heat sink, cooling efficiency may be improved. In addition, since the heat generated from the battery cell 300 is discharged to the outside through the support member 200 in contact with the cell cover 100, the heat transfer efficiency can be increased by heat transfer at various sites.

Meanwhile, a battery pack (not shown) according to an embodiment of the present invention may include one or more battery modules according to an embodiment of the present invention as described above. The battery pack may further include a case for accommodating the battery module, various devices for controlling charging and discharging of the battery module, such as a BMS, a current sensor, and a fuse, in addition to the battery module. .

On the other hand, a vehicle (not shown) according to an embodiment of the present invention may include the above-described battery module or a battery pack (not shown), the battery pack (not shown) may include the battery module. In addition, the battery module according to an embodiment of the present invention may be applied to a predetermined vehicle (not shown) provided to use electricity such as the vehicle (not shown), for example, an electric vehicle or a hybrid vehicle.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art and the technical spirit of the present invention. Of course, various modifications and variations are possible within the scope of the claims.

100: cell cover 110: protrusion
200: support member 210: insertion hole
220: intermediate support 300: battery cell
310: electrode lead 400: thermal pad
500: heat dissipation member

Claims (9)

A cell cover surrounding the battery cell and having a protrusion formed therein;
A support member supporting the cell cover and having an insertion hole into which the protrusion is inserted; And
A heat dissipation member disposed close to the protrusion of the cell cover and dissipating heat generated from the battery cell;
The cell cover is provided of a metal material,
The protrusion is formed of a plurality of protrusions, the support member is provided with a plurality of insertion holes so that each of the plurality of protrusions can be inserted,
An intermediate support part is formed between the plurality of insertion holes of the support member to contact the cell cover to support the cell cover.
The protruding portion is formed with a locking groove that can be caught by the intermediate support portion so that the locking groove is caught by the intermediate support portion,
The battery module further comprises a thermal pad in contact with the protrusion for the transfer of heat generated from the battery cell. delete delete delete The method of claim 1,
When the protrusion of the cell cover is inserted into the insertion hole of the support member, the protrusion and the support member are located on the same horizontal line or another horizontal line, and both the protrusion and the support member are in contact with the thermal pad. Battery module. The method of claim 1,
And the heat dissipation member is in contact with the thermal pad. The method of claim 1,
The support member is a battery module, characterized in that provided with a cooling plate for cooling the battery cell. A battery pack comprising the battery module according to any one of claims 1 to 5. An automobile comprising the battery module according to any one of claims 1 to 5.

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