KR20160150514A - Battery Module - Google Patents

Abstract

A battery module according to an aspect of the present invention includes a cell laminate formed by stacking a plurality of secondary battery cells in a horizontal or vertical direction and a cooling case which has an inner space corresponding to the volume of the cell laminate, accommodates the cell laminate to allow at least one outer periphery of the cell laminate to touch the inner wall, and performs heat exchange with the cell laminate. So, excellent cooling efficiency for a battery cell can be obtained.

Description

A battery module {Battery Module}

The present invention relates to a battery module, and more particularly, to a battery module capable of improving cooling performance and simplifying a module structure.

Secondary batteries having high electrical characteristics such as high energy density and high ease of application according to the product group can be applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) driven by electric driving sources, Storage devices (Energy Storage System) and so on. Such a secondary battery is not only a primary advantage that the use of fossil fuel can be drastically reduced, but also produces no by-products resulting from the use of energy, and thus is attracting attention as a new energy source for enhancing environmental friendliness and energy efficiency.

The battery pack applied to the electric vehicle has a structure in which a plurality of cell assemblies including a plurality of unit cells are connected in series in order to obtain high output. The unit cell includes a positive electrode and a negative electrode current collector, a separator, an active material, an electrolyte, and the like, and can be repeatedly charged and discharged by an electrochemical reaction between the components.

In recent years, there is a growing demand for a large-capacity structure including utilization as an energy storage source, and a demand for a battery pack in which a plurality of secondary batteries are connected in series and / or in parallel is assembled.

Since such a battery pack is manufactured such that a plurality of secondary batteries are densely packed in a narrow space, it is important to easily discharge heat generated in each secondary battery. Since the charging or discharging process of the secondary battery is performed by the electrochemical reaction as described above, the battery may be affected by the ambient temperature condition environment. For example, when the charging / discharging process is performed in a state where the battery is exposed to a temperature or humidity condition such as a cryogenic temperature or a very high temperature at which the optimum temperature is not maintained, the charging / discharging efficiency of the battery is lowered, Can occur.

As one of various methods of releasing heat generated in a secondary battery, Korean Patent Laid-Open Publication No. 10-2013-0062056 discloses a cooling method using cooling water. Specifically, these conventional battery modules include a plate-shaped cooling fin made of an aluminum material interposed between the secondary battery cells, a cooling tube surrounding the rim of the cooling fin, and a lamination layer for preventing the flow of the individual secondary battery cells and guiding the lamination Cartridge. ≪ / RTI > However, such conventional water-cooled or air-cooled battery modules have several disadvantages. For example, in the conventional battery module, the volume of the entire battery module becomes larger due to the addition of parts such as a stacking cartridge, a cooling fin, and a cooling tube, and the energy density per unit volume is inevitably lowered. Further, as the structure of the battery module becomes complicated, there arises a problem that ease of assembly and product productivity are inferior.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a battery module that is simple in structure and has excellent battery cell cooling efficiency.

Other objects and advantages of the present invention will become apparent from the following description, and it will be understood by those skilled in the art that the present invention is not limited thereto. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a battery module comprising: a cell laminate formed by stacking a plurality of secondary battery cells in a horizontal or vertical direction; And a cooling case having an inner space corresponding to the volume of the cell stack body and accommodating the cell stack body so that at least one outer peripheral portion of the cell stack body contacts the inner wall and performing heat exchange with the cell stack body have.

The battery module according to another aspect of the present invention is characterized in that the cell stack body is constituted by pouch type secondary battery cells, and each of the pouch type secondary battery cells comprises a heat-welded rim of the pouch type secondary battery cell At least both of the wing portions may be disposed in contact with the inner wall surface of the cooling case in a bent form.

According to another aspect of the present invention, there is provided a battery module, wherein the cell stack body is constituted by pouch type secondary battery cells, the cooling case includes a groove portion partially recessed on both side inner wall surfaces facing each other, Both the wing portions of the heat-welded rim portions of the pouch type secondary battery cell can be fitted to the groove portion.

The battery module according to another aspect of the present invention may include a bushing which is integrally connected to the cell stack and the cooling case and which binds the cell stack to the cooling case by at least one deformation process .

The battery module according to another aspect of the present invention may have a bushing through hole formed in a rim of the pouch type rechargeable battery cells and two opposite surfaces of the cooling case opposite to each other so that the bushing is inserted and passed therethrough .

According to another aspect of the present invention, there is provided a battery module, wherein the cooling case comprises: a housing formed of a thermally conductive material and having at least one side opened to form the internal space, at least one open side of the housing being covered with a cover And a housing cover that engages with the housing.

The battery module according to another aspect of the present invention is characterized in that the cell stack is constituted by pouch type secondary battery cells, the pouch type secondary battery cell has at least one through hole at a heat welded rim portion, The housing has at least one binding member having a diameter corresponding to the through hole and standing upright in a columnar form on the bottom surface so that the pouch type secondary battery cells can be stacked one by one on the binding member through the through hole .

The battery module according to another aspect of the present invention may further include a heat sink disposed in contact with the cooling case to absorb heat of the cooling case.

According to another aspect of the present invention, a battery pack including the above-described battery module may be provided.

According to another aspect of the present invention, an automobile including the above-described battery module can be provided. The automobile may be any one of an electric vehicle, a hybrid electric vehicle, and a plug-in hybrid electric vehicle.

According to an aspect of the present invention, the number of components of the battery module can be simplified, the structure can be simplified, the capacity ratio of the secondary battery cells in the module can be increased, and the energy density per unit volume can be increased.

According to another aspect of the present invention, the heat of the cell stack can be radiated through the hexagon of the cooling case formed in the form of a box of a thermally conductive material, so that the cooling efficiency can be improved.

1 is a perspective view schematically showing a configuration of a battery module according to an embodiment of the present invention.
2 is a schematic perspective view of a secondary battery cell according to an embodiment of the present invention.
3 is a cross-sectional view taken along line I-I 'of Fig.
4 is a cross-sectional view taken along line II-II 'of FIG.
5 is a perspective view illustrating a heat flow when a heat sink is mounted on a battery module according to an embodiment of the present invention.
6 is an exploded perspective view of the battery module of FIG.
7 is an exploded perspective view of a battery module according to a modification of the cooling case shown in FIG.
8 is a view showing an assembled state between a cooling case and secondary battery cells according to another embodiment of the present invention.
Fig. 9 is a cross-sectional view taken along the line III-III 'in Fig.
10 is a perspective view schematically showing the configuration of a cooling case according to another embodiment of the present invention.
11 is a view showing an assembled state between the cooling case and the secondary battery cells of Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be construed as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

The embodiments of the present invention are provided to explain the present invention more fully to the ordinary artisan, so that the shape and size of the components in the drawings may be exaggerated, omitted or schematically shown for clarity. Thus, the size or ratio of each component does not entirely reflect the actual size or ratio.

2 is a schematic perspective view of a secondary battery cell according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of the secondary battery cell according to an embodiment of the present invention. FIG. 3 is a perspective view illustrating a battery module according to an embodiment of the present invention. 1 'in Fig. 1, and Fig. 4 is a cross-sectional view taken along the line II-II' in Fig.

Referring to these figures, a battery module 100 according to the present invention includes a cell laminate 10 and a cooling case 20. Here, the cell laminate 10 refers to an aggregate in which a plurality of secondary battery cells 12 are stacked in a horizontal or vertical direction.

The secondary battery cell 12 constituting the cell stack 10 may be a pouch type secondary battery cell 12. The pouch-type secondary battery cell 12 may include an electrode assembly, a pouch-type packaging material, and an electrode lead L.

Although not shown, the electrode assembly may be configured such that the positive electrode plate and the negative electrode plate are disposed to face each other. The positive electrode plate and the negative electrode plate are formed as a structure in which the active material slurry is applied to the current collector. The slurry is usually formed by stirring the granular active material, auxiliary conductor, binder, plasticizer, etc. with the solvent added.

Such an electrode assembly may be provided by a stacked type in which a plurality of positive electrode plates and negative electrode plates are sequentially stacked, or a single positive electrode plate and a winding type in which one negative electrode plate is wound with a separator interposed therebetween. For example, the electrode assembly may be in the form of a stack, a combination of a stacked type and a folded type, and the like.

The electrode lead L is connected to the electrode assembly and exposed to the outside of the pouch-type packaging material, and functions as an electrode terminal that can be electrically connected to other secondary battery cells 12 or an external device.

The pouch-type packaging material protects the internal components such as the electrode assembly and the electrolyte, and performs the function of complementing and dissipating the electrochemical properties of the electrode assembly and the electrolyte.

The pouch packaging material may be a laminate sheet including a resin layer and a metal layer, and may be configured such that a rim region is thermally fused and sealed while the electrode assembly and the electrolyte are embedded. More specifically, the pouch-type packaging material may be composed of two pouches, that is, an upper pouch and a lower pouch, and at least one of them may be formed with a concave inner space. And the edge regions of the upper pouch and the lower pouch are thermally fused together to seal the inner space accommodating the electrode assembly.

2, a side portion corresponding to a long side of the edge region of the upper pouch and the lower pouch which are mutually heat-sealed is referred to as a wing 12a, and both sides corresponding to the short side are referred to as front or rear It will be referred to as a terrace 12b.

At least one bushing through-hole (H) may be provided in a peripheral region of the pouch packing material according to the present invention. Particularly, in the present embodiment, two bushing through holes H may be provided in the front and rear terraces 12b, respectively, of the rim of the pouch package. That is, the pouch packaging material may be provided with a total of four bushing through holes H in a rectangular shape. When the plurality of secondary battery cells 12 are stacked up and down, the bushing through holes H of each secondary battery cell 12 can be placed on the coaxial line up and down. By inserting the bushing 30 into the bushing through holes H, the secondary battery cells 12 can be bound together. A more detailed description will be described later for the sake of convenience.

The cooling case 20 is a component that thermally contacts the cell stack 10 to dissipate the heat of each secondary battery cell 12 to the outside. In other words, the cooling case 20 is provided in a box shape and has an internal space corresponding to the volume of the cell stack 10, and the cell stack 10 is formed so that the outer periphery of the cell stack 10 is in contact with the inner wall. Absorbing the heat of the cell stack 10, and radiating the heat to the outside.

The cooling case 20 may be made of a metal material such as aluminum or aluminum alloy, copper, gold, or silver, which is high in heat conductivity and light in weight, and a ceramic material such as aluminum nitride or silicon carbide other than metal. Preferably, the inner wall of the cooling case 20 can be insulated. For example, the inner wall of the cooling case 20 may be coated with a ceramic epoxy or the like having excellent thermal conductivity and electrical insulation.

The cooling case 20 may include a housing 21 and a housing lid 22, which are box-shaped in the form of a rectilinear surface, and can be coupled with each other.

As shown in Fig. 1, the housing 21 is configured to accommodate the cell stack 10 in the inner space. The cell stack 10, that is, the secondary battery cells 12, may be stacked vertically or horizontally in the inner space of the housing 21 through the opened one side of the housing 21.

The housing lid 22 is configured to engage with the housing 21 to cover the open side of the housing 21. The housing 21 and the housing lid 22 can be easily separated from each other by a detachable structure to facilitate the storage and replacement of the cell stack 10. [

More specifically, each of the secondary battery cells 12 has a rectangular flat plate shape and contacts at least the inner wall surface of the housing 21 in the form of bending at least both wings 12a of the heat-welded rim portions of the pouch packing material. .

1 and 3, the width of the internal space of the housing 21 in the X direction is narrower than the unidirectional width of the initial secondary battery cell 12, so that the wing 12a of the secondary battery cell 12 And may be disposed to abut the inner wall surface of the cooling case 20 in a folded state at an angle of approximately 90 degrees. In other words, the secondary battery cells 12 can be layered in a state in which the wings 12a are folded while being pressed into the housing 21. By thus folding the wings 12a of the respective secondary battery cells 12, the inner wall surfaces of each secondary battery cell 12 and the housing 21 can be brought into close contact with each other.

1 and 4, the Y-directional width of the internal space of the housing 21 is formed to substantially coincide with the longitudinal width of the initial secondary battery cell 12, so that at least the front and rear terraces of the pouch packaging material 12b may be arranged to abut the inner wall surface of the housing 21.

Here, as shown in FIG. 1, an opening 21a may be formed in the front portion and the rear portion of the housing 21 located in the Y direction. The openings may be formed by the width and height of the electrode leads L arranged in layers.

Through these openings, the positive and negative leads can be arranged to be exposed out of the housing 21. Although not shown in detail, the electrode leads L exposed to the outside may be connected to each other in series or in parallel, or may be electrically connected to an external device. 1 and 3, the ends of the front and rear terraces 12b of the pouch packing material located on both sides of the electrode lead L can abut against the front surface portion of the housing 21 and the inner wall surface of the back surface portion.

In the present embodiment, one opening is provided in each of the front and back portions of the housing 21, but it is also possible to provide multiple slots with narrow openings to connect the electrode leads L in the housing 21 and to form one or two Only the electrode leads L may be exposed to the outside of the housing 21.

In this way, the edge portions of the pouch packaging material, that is, the outer peripheral portion of the cell laminate 10 are disposed so as to be in contact with the inner wall surface of the housing 21 so that the heat of the secondary battery cell 12 flows through four Lt; / RTI >

That is, the entire rim portion of the pouch packing material can serve as a cooling fin functioning as a heat transfer medium in the conventional battery module 100. Accordingly, the heat generated in each secondary battery cell 12 during charging and discharging can be radiated to the outside in various directions, that is, radially through all the surfaces of the cooling case 20, so that the cooling performance can be enhanced.

5 is a perspective view illustrating a heat flow when a heat sink is mounted on a battery module according to an embodiment of the present invention.

Referring to FIG. 5, the battery module 100 according to the present embodiment may further include a heat sink 40.

The heat sink 40 refers to an object that absorbs heat and emits heat from other objects by thermal contact. The cooling case 20, as described above, has a hexahedral structure, and heat conduction can be achieved on both sides. Therefore, the heat sink 40 may be disposed in contact with one side of the six sides of the cooling case 20. In other words, due to the structural features of the cooling case 20, the degree of freedom of installation of the heat sink 40 can be increased.

The heat sink 40 according to the present embodiment may have a hollow structure including a flow passage therein, and the refrigerant may flow into the internal flow passage. The refrigerant is not particularly limited as long as it easily flows in the flow path and is excellent in cooling ability, and may be a gas or a liquid. For example, the latent heat is high and can be water that can maximize cooling efficiency. However, the present invention is not limited to this, and it may be an antifreeze, gas refrigerant, air or the like as long as a flow occurs.

As shown in Fig. 5, the heat generated in the cell laminate 10 can flow in multiple directions, so that a larger amount of heat can be quickly released to the outside. Particularly, since the cooling case 20 is kept at a low temperature by the heat sink 40, the entirety of the six sides of the cooling case 20 can function more effectively as a heat sink, thereby further improving the cooling efficiency.

Of course, unlike the present embodiment, the heat sink 40 in the configuration of the battery module 100 can be omitted. The cooling case 20 may be installed in a position having good ventilation so that passive cooling using only the external air flow may be performed.

FIG. 6 is an exploded perspective view of the battery module shown in FIG. 1, and FIG. 7 is an exploded perspective view of a battery module according to a modified example of the cooling case shown in FIG.

6, a battery module 100 according to an embodiment of the present invention is integrally connected to a cell stack 10 and a cooling case 20, and at least one end of the cell stack And a bushing 30 that binds the battery 10 to the cooling case 20.

Each of the secondary battery cells 12 and the cooling case 20 may further include a bushing through hole H through which the bushing 30 can be inserted.

Four bushing through holes H may be formed in each of the secondary battery cells 12, two in each of the front and rear terraces 12b of the pouch packaging material. Four bushing through holes H are formed in the cooling case 20 at four positions corresponding to the four bushing holes H formed in the secondary battery cell 12, . That is, the secondary battery cells 12 arranged in layers and the bushing holes H of the cooling case 20 may be coaxially positioned at corresponding positions.

The bushing 30 may be inserted into each of the bushing through holes H and passed therethrough. One end of the bushing 30 is inserted into a bushing through hole H provided at one side of the cooling case 20 and passes through the bushing through hole H of the cell stack 10 to be connected to the bushing 30 of the cooling case 20 And can be drawn out of the other bushing through hole (H). One end of the bushing 30 thus drawn can be deformed and fixed to the cooling case 20 by a forging process.

Meanwhile, the secondary battery cells 12 may be stacked in the housing 21 in the vertical or horizontal direction. The bushing through holes H of the secondary battery cell 12 are directed in the vertical direction so that the bushing through hole H is formed in the bottom surface of the housing and the housing cover so that the bushing 30 can be vertically inserted. The cooling case 20 can be constructed. However, in the latter case, since the bushing through holes H of the secondary battery cell 12 are oriented in the horizontal direction, the bushing 30 must be inserted in the left-right direction. Therefore, as shown in FIG. 6, the cooling case may be configured so that the bushing through holes H are formed on both side portions of the housing 21. FIG.

That is, the bushing through holes H of the cooling case 20 can be formed on two mutually facing plate surfaces of the cooling case 20, in accordance with the layered arrangement direction of the cell stack 10.

The bushing through hole H is formed in the secondary battery cell 12 and the cooling case 20 so that four bushings 30 can be used. However, in order to secure the fixing force of the cell laminate 10, A bushing through hole H may be formed in the secondary battery cell 12 and the cooling case 20 so that only the bushings 30 may be used. In the meantime, although the bushing 30 is used as a means for binding the cell stack 10 to the cooling case 20 as an embodiment of the present invention, the scope of the present invention should be limited to the bushing 30 It is not. That is, any binding member may be used as long as it is inserted into the bushing through hole H of the secondary battery cell 12, passes through the bushing hole H, and can be attached to the cooling case 20.

As described above, in the present embodiment, the front and rear terraces 12b, which may be a dead space in the heat-welded rim portion of the pouch packaging material, that is, the secondary battery cell 12, Are fixed to the cooling case 20 in a single body. Therefore, only the cooling case 20 and the bushing 30 of the present embodiment can replace the conventional secondary battery holding cartridge, and the number of parts of the module can be simplified.

Moreover, it is not necessary to use a component such as a cooling pin which is interposed between the conventional cartridge or the cells, and the volume ratio of the secondary battery cell in the module can be considerably increased. Therefore, the energy density per unit volume of the battery module 100 according to the present embodiment can be significantly higher than that of the conventional battery module 100.

FIG. 8 is a view showing an assembly state between a cooling case and secondary battery cells according to another embodiment of the present invention, and FIG. 9 is a sectional view taken along line III-III 'of FIG.

Hereinafter, another embodiment of the present invention will be described with reference to FIGS. 8 to 9. FIG. The same reference numerals denote the same members, and redundant description of the same members will be omitted, and differences from the above-described exemplary embodiments will be mainly described.

The cooling case 20 'according to another embodiment of the present invention includes a housing 21 and a housing lid 22 similar to the above-described embodiment, and the housing 21 is one- The housing cover 22 may be configured to be detachably coupled to the housing 21.

However, referring to Figs. 8 to 9, the housing 21 according to the present embodiment, unlike the above-described embodiment, further includes a groove portion G on both inner wall surfaces opposed to each other. The groove portion G is configured so that the wing 12a of the pouch type secondary battery cell 12 can be fitted and fitted.

8, the left side face plate 21L, the right side face plate 21R, and the upper portion are located on the left side of the housing 21, The upper plate 21U, the lower plate 21D, and the back plate.

The left side face plate 21L, the right side face plate 21R, the upper face plate 21U, the bottom face plate 21D and the back face plate are conceptually separated elements, and these plates or a part of the plates can be assembled Of course it is.

The groove portion G may be provided on the left side face plate 21L, the right side face plate 21R, the upper face plate 21U, and the back face plate in accordance with the stacking direction of the secondary battery cells 12, respectively. In this embodiment, the secondary battery cells 12 are stacked in the vertical direction, and the groove portion G is provided on the left side face plate 21L and the right side face plate 21R.

More specifically, the groove portion G extends from one end of the left side face plate 21L and the right side face plate 21R to the other end so as to have a shape and depth corresponding to both the wings 12a of the secondary battery cell 12 . The plurality of grooves G may be provided along the height direction of the housing 21 by the number of the secondary battery cells 12 accommodated in the housing 21. [

The housing 21 according to the present embodiment has a unidirectional width, that is, a distance between the left side plate 21L and the right side plate 21R is substantially equal to the unidirectional width of the secondary battery cell 12 except for the wing 12a And the longitudinal width may be substantially the same as the longitudinal width of the secondary battery cell 12. [

The stacking order of the secondary battery cells 12 in the cooling case 20 according to the present embodiment will be briefly described. First, at the open front side of the housing 21, both wings 12a of the secondary battery cell 12 And the secondary battery cell 12 is pushed into the housing 21 deeply. Then, the other secondary battery cells 12 are sequentially stacked in the same manner. Then, the open end of the housing 21 is covered with the housing cover 22. Then, the cell stack body 10 can be fixed by using four bushings 30.

In this embodiment, the housing cover 22 and the back plate of the housing 21 may be provided with openings 21a. The electrode lead portion may be exposed to the outside through the opening 21a. The ends of the front and rear terrace portions 12b of the pouch packaging material can be brought into contact with the inner wall surface of the housing lid 22 and the inner wall surface of the back plate.

Particularly, according to the configuration of the present embodiment, both wings 12a of the pouch package can be inserted into the groove portion G, and both sides of the wing 12a can be brought into tight contact with the groove portion G. [ 8, the side surface portion of the pouch packaging material can be brought into contact with the inner wall surface of the housing 21. As shown in Fig. Therefore, the effective thermal contact area between the edge region of the pouch package and the cooling case 20 'increases, and the heat transfer rate can be further improved. In addition, since the wings 12a of the pouch packaging material are constrained to the groove G, the fixing force of the secondary battery cells 12 can be further increased.

FIG. 10 is a perspective view schematically showing a configuration of a cooling case according to another embodiment of the present invention, and FIG. 11 is a view showing an assembled state between the cooling case and the secondary battery cells of FIG.

Referring to these drawings, the housing 21 according to the present embodiment can be configured to include at least one binding member 23 standing upright in a columnar shape on the bottom surface.

As shown in FIG. 10, the housing 21 may be provided in an open top shape. One end of the binding member 23 may be fixed to the bottom surface of the housing 21 and the other end of the binding member 23 may be exposed at least over the upper end of the housing 21.

The other end of the binding member 23, that is, the head portion 23a, may be provided with a thread that can be fastened to the nut N. [ Four binding members may be provided on the bottom corner region of the housing 21, one for each.

Similar to the above-described embodiment, the secondary battery cell 12 has four through-holes H at the heat-welded rims, and the housing lid 22 is also configured with four through-holes H . At this time, the through holes (H) may have a diameter corresponding to the binding member (23).

11, the secondary battery cells 12 are stacked one upon another on the binding member 23 through the through holes H and are stacked in the housing 21, The housing 21 can be covered with the cover 22. At this time, the head portion 23a of the binding member 23 can be exposed to the outside through the through hole H of the housing cover 22. [ Then, the housing cover 22 and the housing 21 can be tightly coupled by tightening the exposed head portion 23a with the cap nut (N) or the like.

In particular, according to the housing 21 of the present embodiment, when the secondary battery cells 12 are stacked, the secondary battery cells 12 can be guided and regularly guided by the binding member 23, Can be suppressed.

In the present embodiment, the head portion 23a of the binding member 23 is exposed on the housing lid 22. Alternatively, the height of the binding member 23 may be limited to the height of the housing 21, It may be configured to cover the housing 21 directly with the lid 22. Of course, in this case, the through hole H may not be provided in the housing lid 22. [

The battery pack according to the present invention may include at least one battery module 100 according to the present invention. The battery pack according to the present invention may further include various devices for controlling charge and discharge of the battery module 100 such as a battery management system (BMS), a current sensor, a fuse, and the like in addition to the battery module 100 have.

The battery module 100 according to the present invention can be applied to an automobile such as an electric car or a hybrid car. That is, the automobile according to the present invention may include the battery module 100 according to the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

On the other hand, in the present specification. It is to be understood that the terminology such as up, down, left, right, etc., is used for convenience of explanation, but can be expressed differently depending on the viewing position of the observer or the position of the object. To be clear to.

100: battery module 10: cell laminate
12: Secondary battery cell 12a: Wing
12b: terrace 20: cooling case
21: housing 22: housing cover
30: Bushing H: Bushing through hole

Claims (10)

A cell stack formed by stacking a plurality of secondary battery cells in a horizontal or vertical direction; And
And a cooling case having an inner space corresponding to the volume of the cell stack body and accommodating the cell stack body so that at least one outer peripheral portion of the cell stack body is in contact with the inner wall to perform heat exchange with the cell stack body, . The method according to claim 1,
Wherein the cell stack is constituted by pouch type secondary battery cells,
Wherein each of the pouch-type secondary battery cells is disposed such that at least both wing portions of heat-welded rim portions of the pouch type secondary battery cell are bent so as to be in contact with an inner wall surface of the cooling case. The method according to claim 1,
Wherein the cell stack is constituted by pouch type secondary battery cells,
Wherein the cooling case has a groove portion formed on both inner wall surfaces opposed to each other to be partially recessed and both wing portions of a heat welded rim portion of the pouch type secondary battery cell are fitted to the groove portion. . The method according to claim 2 or 3,
And a bushing which is integrally connected to the cell stacked body and the cooling case, and which binds the cell stacked body to the cooling case by deformation processing of at least one end portion. 5. The method of claim 4,
Wherein a bushing through hole is formed in two opposite surfaces of the cooling case and a rim portion of the pouch type secondary battery cells so that the bushing is inserted and passed through the bushing hole. The method according to claim 1,
The cooling case is made of a thermally conductive material,
The battery module according to claim 1, further comprising: a housing which forms the internal space in a box shape having at least one side opened; and a housing cover which engages with the housing to cover at least one opened side of the housing. The method according to claim 6,
Wherein the cell stack is constituted by pouch type secondary battery cells,
The pouch type secondary battery cell has at least one through hole at a heat welded rim portion. The housing includes at least one binding member having a diameter corresponding to the through hole and standing upright on a bottom surface in a columnar shape, And the pouch type secondary battery cells are stacked one by one on the binding member through the through holes. The method according to claim 1,
Further comprising a heat sink arranged to be in contact with the cooling case to absorb heat of the cooling case. A battery pack comprising the battery module according to any one of claims 1 to 8. An automobile comprising a battery module according to any one of claims 1 to 8.

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