WO2015065043A1

WO2015065043A1 - Frame for secondary battery and battery module comprising same

Info

Publication number: WO2015065043A1
Application number: PCT/KR2014/010251
Authority: WO
Inventors: 김기연; 성준엽; 엄영섭; 유성천; 강달모
Original assignee: 주식회사 엘지화학
Priority date: 2013-10-30
Filing date: 2014-10-29
Publication date: 2015-05-07

Abstract

Disclosed are a frame for a secondary battery capable of preventing gas generated from a secondary battery from entering a cooling flow path or a duct connected thereto, and a battery module comprising the frame for a secondary battery. The frame for a secondary battery, according to the present invention, comprises: an upper cooling plate formed into a plate shape from a thermally conductive material; a lower cooling plate which is formed into a plate shape from a thermally conductive material and is arranged opposite and at a specific distance away from the upper cooling plate, so as to form a flow path between the upper cooling plate and the lower cooling plate; a main frame comprising four unit frames of which the ends are mutually connected, and is configured so as surround the outer periphery of the upper cooling plate and the lower cooling plate and so as to receive the outer periphery portion of a pouch-type secondary battery, wherein an opening is formed on a side surface of two unit frames so that the flow path is open, and wherein corresponding protruding/receding parts are formed on an upper portion and a lower portion of at least two of the unit frames.

Description

Frame for secondary battery and battery module including same

The present invention relates to a battery, and more particularly, to a frame for a secondary battery used when constructing a battery module including a plurality of secondary batteries and a battery module including the same.

This application is a priority application for Korean Patent Application No. 10-2013-0129860, filed October 30, 2013 and Korean Patent Application No. 10-2014-0137614, filed October 13, 2014. All the contents disclosed in the specification and drawings of this application are incorporated in this application by reference.

Commercially available secondary batteries include nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries have almost no memory effect compared to nickel-based secondary batteries, and thus are free of charge and discharge. The self-discharge rate is very low and the energy density is high.

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 for sealing and storing the electrode assembly together with an electrolyte, that is, a battery case.

In general, a lithium secondary battery may be classified into a can type secondary battery in which an electrode assembly is embedded in a metal can and a pouch type secondary battery in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet, depending on the shape of the exterior material.

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 and large devices, a large number of secondary batteries are electrically connected to increase capacity and output. In particular, a pouch type secondary battery is widely used in such a medium-large size device because of its easy lamination.

However, the pouch type secondary battery is generally packaged in a battery case of a laminate sheet of aluminum and a polymer resin, so the mechanical rigidity is not large. Therefore, when constructing a battery module including a large number of pouch type secondary batteries, a frame is often used to protect the secondary battery from external shocks, to prevent the flow thereof, and to facilitate lamination.

The frame may be replaced with various other terms such as a cartridge. In general, the frame may be formed in a rectangular plate shape in which the center part is empty. In this case, four side parts are configured to surround the outer circumference of the pouch type secondary battery. In addition, the frame is used in the form of a plurality of stacked to form a battery module, the secondary battery may be located in the inner empty space generated when the frame is stacked.

Meanwhile, when a plurality of secondary batteries are assembled using a plurality of frames as described above, cooling fins in a plate form may be interposed between the secondary batteries. The secondary battery may be used in a high temperature environment such as summer, and heat may also be generated in the secondary battery itself. In this case, when a plurality of secondary batteries are stacked on each other, the temperature of the secondary battery may be further increased. If the temperature is higher than an appropriate temperature, the performance of the secondary battery may be degraded, and in severe cases, there is a risk of explosion or fire. Therefore, when the battery module is configured, a configuration in which a cooling fin is interposed between the secondary batteries to prevent the temperature rise of the secondary battery through the cooling fins is often used.

In the case of the battery module in which the plate-shaped cooling fins, that is, the cooling plate is interposed between the secondary cells, the secondary battery can be cooled in various forms and manners. Representative of such cooling methods, air cooling is widely used to lower the temperature of the secondary battery through heat exchange between the cooling plate and the air by allowing external air to flow around the cooling plate. In the case of the battery module, a cooling passage is secured around the cooling plate, and the cooling passage is connected to the duct so that air flows in and out of the battery module.

By the way, in the case of the battery module conventionally configured as described above, there may be a problem that the gas generated from the secondary battery is discharged to the outside through the cooling passage and duct. That is, the pouch type secondary battery may generate gas during use, and the gas may include a component harmful to a human body. However, when the harmful gas generated from the secondary battery penetrates into the cooling channel, the penetrated harmful gas may be discharged to the outside through the duct, and the discharged gas may be sucked by the battery user. In particular, in the case of a hybrid vehicle or an electric vehicle, since the medium-large battery pack including many secondary batteries is mounted, there is a high possibility that gas is discharged from the secondary batteries. In addition, when harmful gas is discharged from the vehicle battery pack and flows into the duct, the driver of the vehicle may inhale the harmful gas introduced into the duct to harm the human body, and the driving ability may be reduced due to the harmful gas while driving. There is also a risk of getting lost.

Accordingly, the present invention was devised to solve the above problems, and includes a secondary battery frame and a secondary battery frame which can prevent the generated gas from flowing into a cooling channel or a duct connected thereto even when gas is generated in the secondary battery. An object of the present invention is to provide a battery module, a battery pack and a vehicle.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

Frame for a secondary battery according to the present invention for achieving the above object, the upper cooling plate consisting of a plate of a thermally conductive material; A lower cooling plate formed of a plate of a thermally conductive material and disposed to be spaced apart from each other by a predetermined distance so as to face the upper cooling plate to form a flow path between the upper cooling plate and a space therebetween; And four unit frames connected at both ends to surround the outer circumferential portions of the upper cooling plate and the lower cooling plate. The outer circumferential portion of the pouch type secondary battery is seated, and the flow path is provided at two unit frame sides. An opening is formed to be opened, and includes a main frame having uneven parts formed in a shape corresponding to each other at an upper portion and a lower portion of at least two unit frames.

Preferably, the concave-convex portion is configured to seal the combined portion coupled to the concave-convex portion of the adjacent secondary battery frame when the secondary battery frame is stacked up and down.

Also preferably, the uneven portion is formed at least in the unit frame in which the opening is formed.

Also preferably, the uneven portion is formed to extend in the longitudinal direction of the unit frame.

Also preferably, two or more of the uneven parts are formed on the upper and lower portions of the unit frame, respectively.

Also preferably, the uneven portion is configured such that both the protruding portion and the concave portion are formed on the upper and lower portions of the unit frame, respectively.

Also preferably, the main frame may include a seating portion formed on the unit frame on which the uneven portion is formed to be seated by bending the sealing portion of the pouch-type secondary battery.

Also preferably, the main frame is provided with a sealing member on the uneven portion.

Also preferably, in the vertical stacking of the secondary battery frame, the vent flow path through which the gas flows from the pouch type secondary battery may flow may be physically separated from the flow path between the upper cooling plate and the lower cooling plate.

Also preferably, the main frame may include a venting part configured to open a space in which the pouch type secondary battery is accommodated, on a side surface of the unit frame having no opening.

Also preferably, the main frame may be configured such that one pouch type secondary battery is seated on an upper portion of the upper cooling plate, and another pouch type secondary battery is seated on a lower portion of the lower cooling plate.

In addition, the battery module according to the present invention for achieving the above object includes a secondary battery frame according to the present invention.

In addition, the battery pack according to the present invention for achieving the above object includes a secondary battery frame according to the present invention.

In addition, the vehicle according to the present invention for achieving the above object includes a secondary battery frame according to the present invention.

According to one aspect of the present invention, the cooling passage through which the cooling fluid for heat exchange with the cooling plate flows and the space in which the secondary battery is accommodated can be physically separated more reliably.

Therefore, according to this aspect of the present invention, even if gas is generated from the secondary battery, it is possible to effectively prevent the generated gas from flowing into the cooling passage.

Particularly, according to an aspect of the present invention, when the secondary battery frame is stacked, the protrusions formed on the upper and / or lower part and the insertion grooves formed on the lower and / or upper part are inserted into and fastened, so that the secondary battery is stored in the cooling flow path. The path through which gas can escape can be complicated.

Therefore, according to the present invention, even if harmful gas is generated in the secondary battery, the generated gas can be prevented from being transmitted to the battery pack user through the cooling passage and the duct.

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

1 is a perspective view schematically showing the configuration of a frame for a secondary battery according to an embodiment of the present invention.

FIG. 2 is a right side view of the configuration of FIG. 1. FIG.

3 is a cross-sectional view taken along line AA ′ of FIG. 1.

4 is a cross-sectional view schematically illustrating a structure in which a secondary battery frame according to an embodiment of the present invention is stacked in a vertical direction.

5 is a cross-sectional view showing the concave-convex portion of the frame for secondary batteries according to another embodiment of the present invention.

6 is a cross-sectional view showing a concave-convex portion of a frame for secondary batteries according to still another embodiment of the present invention.

7 is a cross-sectional view showing a configuration of an uneven portion of a frame for secondary batteries according to still another embodiment of the present invention.

8 is a diagram schematically illustrating a configuration method of a battery module according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical spirit 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.

The secondary battery frame according to the present invention is used when a battery module is constructed by stacking and packaging a plurality of secondary batteries. The secondary battery frame may hold the secondary batteries to prevent the flow thereof and guide assembly of the secondary batteries.

1 is a perspective view schematically illustrating a configuration of a frame 1000 for a secondary battery according to an exemplary embodiment of the present invention, and FIG. 2 is a right side view of the configuration of FIG. 1. 3 is a cross-sectional view taken along line AA ′ of FIG. 1. However, in FIG. 1, for convenience of description, a portion of the upper cooling plate 110 is shown in a cut form.

1 to 3, the secondary battery frame 1000 according to the present invention includes an upper cooling plate 110, a lower cooling plate 120, and a main frame 200.

The upper cooling plate 110 is configured in the form of a wide plate, and is disposed in a form in which a wide side is faced up and down. In particular, the upper cooling plate 110 may be configured in the form of a square plate.

The lower cooling plate 120, like the upper cooling plate 110 is configured in the form of a plate, corresponding to the shape of the upper cooling plate 110, for example, to be formed in the same shape as the upper cooling plate 110. Can be. In particular, the lower cooling plate 120 may be disposed under the upper cooling plate 110 in such a manner that a wide surface thereof faces the wide surface of the upper cooling plate 110. In this case, the lower cooling plate 120 may be disposed to be spaced apart from the upper cooling plate 110 by a predetermined distance. Furthermore, the lower cooling plate 120 may be arranged to be parallel to the upper cooling plate 110 in the horizontal direction.

As such, the lower cooling plate 120 is disposed to be somewhat spaced apart from the upper cooling plate 110, and an empty space is formed between the lower cooling plate 120 and the upper cooling plate 110. In addition, since the cooling fluid may flow into the empty space formed as described above, the empty space between the lower cooling plate 120 and the upper cooling plate 110 may function as a flow path. That is, the lower cooling plate 120 forms a cooling flow path in a space between the upper cooling plate 110 and the upper cooling plate 110.

The upper cooling plate 110 and the lower cooling plate 120 may be formed of a material having thermal conductivity so as to exchange heat with the secondary battery 10 positioned at the upper and lower portions, respectively. In particular, the two cooling plates may be made of an aluminum material which is excellent in thermal conductivity and easy to form and light in weight. However, the present invention is not necessarily limited to such a cooling plate material, and the cooling plate may be made of various materials such as metal other than aluminum.

The main frame 200 may include four unit frames, and each unit frame may have a form in which both ends are connected to each other. That is, as shown in FIG. 1, the main frame 200 may have a four-sided side and may have a rectangular ring shape in which the center portion is empty from the top side. In addition, in the main frame 200, each unit frame may form each side of the quadrangle.

The main frame 200 may be configured to surround the outer circumferences of the upper cooling plate 110 and the lower cooling plate 120 through the four unit frames. For example, the main frame 200 has unit frames at the front, rear, left, and right sides, respectively, and each of the unit frames has front, rear, and bottom portions of the upper cooling plate 110 and the lower cooling plate 120. It can be configured to surround the left and right edges. The upper cooling plate 110 may be exposed in an empty center portion of the main frame 200 in the upper direction, and the lower cooling plate 120 may be exposed in the lower direction.

The main frame 200 may be manufactured by injection molding in a state where the upper cooling plate 110 and the lower cooling plate 120 are interposed, but the present invention is not necessarily limited to this manufacturing method.

The main frame 200 may be configured to mount the pouch type secondary battery 10. In particular, the main frame 200 may be configured such that the outer circumferential portion of the pouch type secondary battery 10 is seated. For example, the pouch type secondary battery 10 may be configured such that the shape viewed from the top to the bottom direction is approximately square. In this case, the front, rear, left and right outer periphery portions of the pouch type secondary battery 10 are respectively formed. It may be mounted on the front, rear, left and right unit frame 204 of the main frame 200.

At this time, the outer periphery of the pouch type secondary battery 10 having four sides is configured to be seated on the main frame 200 in all four sides, or some of the four sides, for example, two sides of the front and rear sides of the main frame ( 200 may be configured to be seated.

Preferably, two main pouch type secondary batteries 10 may be mounted on the main frame 200. That is, as shown in Figure 3, the main frame 200, the upper cooling plate 110 and the lower cooling plate 120 may be located in the center portion in the vertical direction, two pouch type secondary battery (10) ) May be located at the lower portion of the upper and lower cooling plate 120 of the upper cooling plate 110 in the main frame 200.

The main frame 200 may be configured such that two or more may be stacked, and thus, two or more secondary battery frames may be stacked. That is, in the main frame 200 configuration of FIG. 3, different main frames 200 may be stacked on the upper and lower portions, respectively. As such, when two or more secondary battery frames are stacked, the main frame 200 is disposed on the outer circumference of the secondary battery 10, and the cooling plate is disposed above or below the secondary battery 10. Therefore, in this case, when a plurality of secondary battery frames are stacked in the vertical direction, two secondary batteries 10 can be stored for each one of the secondary battery frames.

The main frame 200 may have an opening at a side surface, as indicated by O in FIGS. 1 to 3. Here, the opening is configured to penetrate the main frame 200 in the horizontal direction, and the empty space formed between the upper cooling plate 110 and the lower cooling plate 120, that is, at least a portion of the flow path is exposed to the outside and opened. It may be configured to. Therefore, air or the like outside the main frame 200 may flow in and out into a flow path formed between two cooling plates through the opening.

In particular, the opening may be formed at two unit frame side surfaces of four unit frames. In this case, the opening formed in one side of the unit frame may function as the inlet of the fluid, and the opening formed in the other one unit frame side may serve as the outlet of the fluid. For example, as shown in FIG. 1, when the main frame 200 includes the front unit frame 201, the rear unit frame 202, the left unit frame 203, and the right unit frame 204, Openings may be formed in the left unit frame 203 and the right unit frame 204, respectively. In this case, the opening formed in the right unit frame 204 may function as an inlet, and the opening formed in the left frame may function as an outlet. Accordingly, as indicated by an arrow by a dashed line in FIG. 1, the outside air introduced into the opening of the right unit frame 204 flows along the flow path between the two cooling plates and heat exchanges with the secondary battery 10 through the cooling plate. Can be performed. In addition, the air that has undergone heat exchange with the cooling plate may flow out to the outer space of the main frame 200 through the opening of the left unit frame 203.

On the other hand, when the opening is formed on the two side of the unit frame as described above, the opening is preferably formed in each of the unit frame located on the opposite side. For example, as in the above embodiment, the openings may be formed in the left unit frame 203 and the right unit frame 204, respectively. According to this embodiment, since the inlet and the outlet of the flow path are formed in the opposite direction, the flow of fluid flowing along the flow path can be formed in a straight direction. Therefore, in such a configuration, the inflow and outflow of the fluid can be made more smoothly and quickly, the fluid can flow in the entire section of the flow path formed between the cooling plate can be further improved cooling efficiency.

In addition, the main frame 200, the uneven portion 210 may be formed in a form corresponding to each of the upper and lower portions of at least two or more unit frames, respectively. Here, the uneven portion 210 may be composed of a convex portion 212 formed convex in the vertical direction and a concave portion 211 formed concave in the vertical direction. Accordingly, the main frame 200 has a convex portion 212 formed at an upper portion thereof, and a concave portion 211 formed at a lower portion thereof in a form corresponding to the convex portion 212, or a convex portion 212 formed at a lower portion thereof. The concave portion 211 may be formed on the upper portion in a shape corresponding to the convex portion 212.

For example, as illustrated in FIG. 1, the main frame 200 may be configured in a form in which the uneven portion 210 is formed on the upper and lower portions of the left unit frame 203 and the right unit frame 204. have. At this time, the concave-convex portion 210, for example, as shown in Figure 3, the convex portion 212 is formed in the lower portion of the unit frame and the concave portion 211 having a shape corresponding to the shape of the convex portion 212. It may be configured in the form formed on the upper portion of the unit frame. Of course, the concave-convex portion 210 may be formed in a form in which the convex portion 212 is formed on the upper portion of the unit frame and the concave portion 211 is formed on the lower portion of the unit frame.

4 is a cross-sectional view schematically illustrating a structure in which a secondary battery frame according to an embodiment of the present invention is stacked in a vertical direction. In particular, FIG. 4 may be referred to as a configuration in which two secondary battery frames illustrated in FIG. 3 are stacked. For convenience of description, the secondary battery frame located above is called F1 and the secondary battery frame located below is called F2. .

Referring to FIG. 4, the two secondary battery frames F1 and F2 stacked up and down are each formed with a convex portion 212 below the unit frame, and the concave portion having a shape corresponding to the shape of the convex portion 212. 211 is formed on an upper portion of the unit frame. Accordingly, when the F1 and the F2 are stacked in the vertical direction, that is, the vertical direction, the convex and concave portions 210 may be coupled to each other in a form in which the convex portion 212 of the F1 is inserted into the concave portion 211 of the F2.

At this time, the concave-convex portion 210 may be configured to seal the combined portion coupled to the concave-convex portion 210 of the adjacent secondary battery frame at the time of vertical stacking of the secondary battery frame.

For example, in the embodiment of FIG. 4, when F1 and F2 are stacked up and down, and the convex portion 212 of F1 and the concave portion 211 of F2 are mutually coupled, such a coupling portion (denoted by B) May be an obstacle in the flow path of the gas flowing into the space therebetween when F1 and F2 are stacked. Therefore, the gas does not leak or at least the amount of the gas leaks through the space between the frames for the secondary battery can be greatly reduced.

In particular, in the configuration of FIG. 4, a left side of the main frame 200 may be provided with a duct to supply external air to a flow path formed between the cooling plates or to discharge air flowing along the flow path to the outside of the battery module. By the way, in the case of the present invention, since the uneven portion 210 is formed in the space between the stack of the main frame 200 are coupled to each other, the fluid leaking into the gap space of the two main frame 200 is effectively prevented or Can be reduced. Therefore, even if gas is generated from the pouch-type secondary battery 10 located on the right side of the main frame 200 in FIG. 4, such gas is prevented from leaking into the duct provided on the left side through the gap between the main frames 200. Can be reduced.

3 and 4, the upper cooling plate 110 and the lower cooling plate 120 may be elongated to penetrate the unit frame, that is, the main frame 200. According to this embodiment, the gas generated from the pouch type secondary battery 10 flows between the upper cooling plate 110 and the unit frame, or between the lower cooling plate 120 and the unit frame to flow into the flow path or duct. You can stop it.

Also preferably, the uneven portion 210 may be formed at least in the unit frame in which the opening is formed.

For example, as shown in FIG. 1, when an opening for opening the flow path is formed in the left unit frame 203 and the right unit frame 204, the left unit frame 203 and the right unit frame 204 are formed. The uneven portion 210 may also be formed. When gas is generated from the secondary battery 10, it is preferable that such gas does not flow into the duct. However, since the duct may be provided on the outer side of the unit frame in which the opening is formed, when the uneven portion 210 is formed in the unit frame in which the opening is formed as in the above embodiment, between the uneven portions 210 when the secondary battery frame is stacked. Due to the coupling, gas can be effectively prevented from entering the duct from the secondary battery 10.

Also preferably, the uneven portion 210 may be formed to extend in the longitudinal direction of the unit frame. According to this embodiment of the present invention, gas inflow and out between the inside and the outside in the unit frame in which the uneven portion 210 is formed can be effectively prevented.

For example, when the uneven portion 210 is formed in the left unit frame 203 and the right unit frame 204 as shown in FIGS. 1 and 2, the uneven portion 210 may include the left unit frame 203 and It may be formed to extend in the longitudinal direction from the front end to the rear end of the right unit frame 204. According to this configuration of the present invention, the gas between the inside and the outside can be prevented from flowing into and out of any part of the left unit frame 203 and the right unit frame 204.

In particular, the uneven portion 210 may be formed to extend from one end to the other end of the unit frame in which the opening is formed. Therefore, according to this configuration of the present invention, since outflow of gas is prevented over the entire part of the unit frame in which the opening is formed, it is possible for the gas generated in the secondary battery 10 to flow into the duct provided on the outside of the unit frame in which the opening is formed. Can be prevented.

Also preferably, two or more of the uneven parts 210 may be formed at upper and lower portions of the unit frame, respectively. This configuration will be described in more detail with reference to FIG. 5.

5 is a cross-sectional view showing the concave-convex portion 210 of the frame for a secondary battery according to another embodiment of the present invention. FIG. 5 is a cross sectional view taken along line AA ′ of FIG. 1, similar to FIG. 3, but shows a concave-convex portion 210 configuration different from FIG. 3.

Referring to FIG. 5, two uneven parts 210 may be formed on an upper portion of a unit frame, and two may be formed on a lower portion of a unit frame. For example, as shown in FIG. 5, two concave portions 211 may be formed at the upper portion of the unit frame, and two convex portions 212 may be formed at the lower portion of the unit frame.

In particular, in the configuration in which at least two uneven parts 210 are formed at the upper and lower portions of the unit frame, the uneven parts 210 may be arranged in a direction perpendicular to the length direction of the unit frame. For example, in the configuration of FIG. 5, the two concave portions 211 formed on the upper portion of the unit frame may be configured to be arranged in a left and right direction perpendicular to the longitudinal direction of the unit frame. In addition, corresponding to the arrangement of the concave portion 211, the two convex portions 212 may also be configured to be arranged in the left and right directions at the bottom of the unit frame.

According to this configuration of the present invention, when two secondary battery frames are stacked in the vertical direction, gas leakage into the stacked gap space can be more reliably prevented. That is, when two secondary battery frames illustrated in FIG. 5 are stacked, since two uneven parts 210 exist in the gap between the stacks, a path through which gas may leak may be further complicated. Therefore, this can more reliably prevent the gas from flowing out into the gap between the stacked frames for the secondary battery.

On the other hand, as shown in the above embodiment, when two or more uneven portions 210 are formed on the upper and lower portions of the unit frame, respectively, it is not necessary to form the same uneven portion 210 in the same portion. That is, in FIG. 5, two concave portions 211 are formed at the upper portion of the unit frame, and two convex portions 212 are formed at the lower portion of the unit frame, but the concave-convex portion 210 has various other forms. It can also be configured as.

6 is a cross-sectional view showing the concave-convex portion 210 of the frame for a secondary battery according to still another embodiment of the present invention. 6 is another modification of the configuration of FIGS. 3 and 5.

Referring to FIG. 6, both the concave portion 211 and the convex portion 212 are formed above and below the unit frame, respectively. That is, the unit frame may be configured such that both the concave portion 211 and the convex portion 212 are formed at an upper portion thereof, and both the concave portion 211 and the convex portion 212 are formed at the lower portion thereof. According to this configuration of the present invention, a path through which gas leaks into the gap space between the main frames 200 can be more complicated.

Also preferably, the main frame 200 may include a seating part formed on the upper part of the unit frame on which the uneven part 210 is formed so that the sealing part of the pouch type secondary battery 10 may be bent and seated. That is, as shown by the portion C in the configuration of FIG. 4, in the upper part of the unit frame in which the uneven part 210 is formed, the seating part may be seated so as to be seated in a bent form in the sealing part of the secondary battery 10. It is good to be formed. According to this configuration of the present invention, the bent portion and the seating portion of the secondary battery 10 sealing portion can contact each other to form a barrier against gas outflow in the outward direction. Therefore, even if gas is generated through the sealing portion of the secondary battery 10, the gas may be prevented from flowing outward by the bent portion of the sealing portion and the contact portion of the seating portion, or the amount thereof may be reduced.

7 is a cross-sectional view showing a configuration of a portion of the uneven portion 210 of the frame for secondary batteries according to another embodiment of the present invention.

Referring to FIG. 7, the main frame 200 may be provided with a sealing member 230 in the uneven portion 210. Here, the sealing member 230 is a component provided in the uneven portion 210 to improve the sealing force when the coupling between the uneven portion 210. The sealing member 230 may be provided on the surface of the protrusion, as shown in FIG. 7, so as to be located in the space of the coupling portion when the uneven portion 210 is coupled. Alternatively, the sealing member 230 may be provided on the surface of the recess 211 or both the protrusion and the surface of the recess 211.

The sealing member 230 may be made of a rubber material. In the case of the rubber material, it is easy to secure the sealing force so that the fluid does not move through the gap space. However, the present invention is not necessarily limited to the material of the sealing member 230, the sealing member 230 may be composed of various materials that can enhance the sealing force.

Also preferably, in one aspect of the present invention, the venting flow path is preferably physically separated from the cooling flow path. Here, when the gas is generated from the pouch type secondary battery, the vent flow path may mean a path through which the gas flows inside the battery module. In addition, the cooling passage may refer to a path through which the cooling fluid flows inside the battery module. In addition, physically separating the venting flow path and the cooling flow path may mean that the gas flowing in the venting flow path cannot be introduced into the cooling flow path and the gas flowing in the cooling flow path cannot be introduced into the venting flow path. .

That is, in one embodiment of the present invention, in the secondary battery frame, a venting flow path through which the gas flows from the secondary battery flows during the up and down stacking is a cooling flow path between the upper cooling plate 110 and the lower cooling plate 120. It may be configured to be physically separated from.

More specifically, the venting flow path and the cooling flow path may be physically separated by being formed by different layers from each other. For example, in one secondary battery frame, the vent channel may be formed at an upper portion of the upper cooling plate 110, and the cooling channel may be formed at a lower portion of the upper cooling plate 110.

According to this configuration of the present invention, the gas discharged from the secondary battery 10 may not flow out to the side where the opening is formed. In particular, the gas discharged from the secondary battery may be harmful to the human body. According to this configuration of the present invention, even if harmful gas is generated on the secondary battery side, the generated gas is discharged to the outside of the battery pack through the venting flow path. It may not be transmitted to the battery pack user through the cooling passage and the duct.

Also, preferably, the main frame 200 may include a venting unit 220 that opens a space in which the pouch-type secondary battery 10 is stored, on the side of the unit frame in which the opening is not formed. In particular, the opening may be formed at left and right sides of the main frame 200, and the venting unit 220 may be formed at front and rear sides of the main frame 200.

For example, as shown in FIG. 1, when the openings are formed in the left unit frame 203 and the right unit frame 204, the main frame 200 includes the front unit frame 201 in which the openings are not formed. The venting unit 220 may be formed in the rear unit frame 202. According to this configuration of the present invention, when gas is generated from the secondary battery 10 located inside the main frame 200, such gas is the main frame 200 of the main frame 200 through the venting portion 220 of the main frame 200. Can be discharged outward. In this case, since the venting part 220 is positioned in the unit frame in which the opening is not formed, the gas discharged from the secondary battery 10 may not flow out to the side in which the opening is formed.

In particular, in this configuration of FIG. 1, the path through which the cooling fluid flows is formed in the left and right directions between the left unit frame 203 and the right unit frame 204 along the flow path, and the gas generated in the secondary battery 10 The flowing path may be formed in the front-rear direction between the front unit frame 201 and the rear unit frame 202. In this case, the duct for flowing in and out of the cooling fluid to the battery module may be provided on the outside of the left unit frame 203 and the right unit frame 204, the venting device for discharging the gas generated in the secondary battery 10 The front unit frame 201 and the rear unit frame 202 may be provided outside.

Meanwhile, the venting part 220 may be formed in a hole shape or a concave shape as illustrated in FIG. 1.

The battery module according to the present invention includes a plurality of the above-described secondary battery frames.

Referring to FIG. 8, the battery module according to the present disclosure may include a plurality of secondary battery frames 1000 together with a plurality of pouch-type secondary batteries 10. In this case, the secondary battery frame 1000 may be stacked in a vertical direction, and the pouch type secondary battery 10 may be accommodated in an internal space formed by the stacking of the secondary battery frame 1000. In particular, the battery module according to the present invention may be configured to accommodate two pouch-type secondary batteries 10 per one secondary battery frame 1000.

The battery pack according to the present invention may include one or more battery modules according to the present invention. In addition, the battery module may include a plurality of secondary battery frames according to the present invention. In addition, the battery pack according to the present invention, in addition to such a battery module, a case for accommodating the battery module, various devices for controlling the charge and discharge of the battery module, such as BMS (Battery Management System), current sensors, fuses, etc. It may be further included.

The frame for secondary batteries according to the present invention can be applied to an automobile such as an electric vehicle or a hybrid vehicle. That is, the vehicle according to the present invention may include the battery pack according to the present invention, and the battery pack may include the frame for the secondary battery according to the present invention.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

In the present specification, terms indicating directions such as up, down, left, right, before, and after have been used, but these terms are merely for convenience of description and may vary depending on the location of an object or an observer's location. It will be apparent to those skilled in the art that the present invention can be made.

Claims

An upper cooling plate configured in the form of a plate of thermally conductive material;

A lower cooling plate formed of a plate of a thermally conductive material and disposed to be spaced apart from each other by a predetermined distance so as to face the upper cooling plate to form a flow path between the upper cooling plate and a space therebetween; And

It has four unit frames connected at both ends to each other, and surrounds the outer circumference of the upper cooling plate and the lower cooling plate, the outer circumference of the pouch-type secondary battery is seated, the flow path is open on the side of the two unit frame An opening is formed so that the main frame has an uneven portion formed in a shape corresponding to each of the upper and lower portions of at least two unit frames

Frame for a secondary battery comprising a.
The method of claim 1,

The uneven part is a secondary battery frame, characterized in that configured to be coupled to each other in combination with the concave-convex portion of the adjacent secondary battery frame when the vertical stacking of the secondary battery frame.
The method of claim 1,

The uneven part is a secondary battery frame, characterized in that formed at least in the unit frame in which the opening is formed.
The method of claim 1,

The uneven part is a secondary battery frame, characterized in that formed in the form extending in the longitudinal direction of the unit frame.
The method of claim 4, wherein

The uneven part is a secondary battery frame, characterized in that formed in the form extending in length from one end to the other end of the unit frame in which the opening is formed.
The method of claim 1,

The uneven part, the secondary battery frame, characterized in that formed at least two on the upper and lower portions of the unit frame.
The method of claim 6,

The two or more uneven parts, the secondary battery frame, characterized in that arranged in a direction perpendicular to the longitudinal direction of the unit frame.
The method of claim 1,

The uneven part is a frame for a secondary battery, characterized in that both the protrusion and the recess is formed on the upper and lower portions of the unit frame, respectively.
The method of claim 1,

The main frame is a secondary battery frame, characterized in that the mounting portion is formed on the upper part of the unit frame is formed with the uneven portion to be seated by bending the sealing portion of the pouch-type secondary battery.
The method of claim 1,

The main frame is a secondary battery frame, characterized in that the sealing member is provided in the uneven portion.
The method of claim 10,

The sealing member is a frame for secondary batteries, characterized in that composed of a rubber material.
The method of claim 1,

In the vertical stacking of the secondary battery frame, the vent flow path in which the gas flows from the pouch type secondary battery flows is physically separated from the flow path between the upper cooling plate and the lower cooling plate.
The method of claim 1,

The main frame is a secondary battery frame, characterized in that the venting portion for opening the space in which the pouch-type secondary battery is accommodated on the side of the unit frame is not formed.
The method of claim 13,

The opening is formed on the left and right sides of the main frame, the venting portion is a secondary battery frame, characterized in that formed on the front and rear sides of the main frame.
The method of claim 1,

The main frame is a frame for a secondary battery, characterized in that one pouch type secondary battery is seated on the upper portion of the upper cooling plate, the other pouch type secondary battery is seated on the lower portion of the lower cooling plate.
The method of claim 1,

The upper cooling plate and the lower cooling plate, the secondary battery frame, characterized in that made of aluminum.
A battery module comprising a frame for a secondary battery according to any one of claims 1 to 16.
A battery pack comprising a secondary battery frame according to any one of claims 1 to 16.
An automobile comprising the frame for secondary batteries according to any one of claims 1 to 16.