Battery Package

Abstract

The present invention discloses a battery package including a pack case, a plurality of battery modules accommodated in an accommodation space of the pack case, a heat sink disposed on a lower plate of the pack case, and a thermoplastic resin disposed between the battery modules and the heat sink, transferring heat from the battery modules to the heat sink and converting into a ceramic and insulating layer when the battery modules experience thermal runaway.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0017464, filed February 9, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a battery package that can prevent a chain reaction of thermal runaway in adjacent battery modules by blocking heat transfer to adjacent battery modules through a lower plate of a pack case when a battery module experiences thermal runaway. [Background technology]

[0003] Typically, a secondary battery includes a positive electrode, a negative electrode, and an electrolyte, and generates electrical energy through a chemical reaction. The use of secondary batteries is gradually increasing due to their rechargeable / dischargeable characteristics. Among these secondary batteries, lithium secondary batteries, with their high energy density per unit weight, are widely used as power sources for electronic communication devices and as driving sources for high-power hybrid and electric vehicles.

[0004] In terms of the shape of these secondary batteries, there is an increasing demand for prismatic and pouch-type battery cells that are thin and can be applied to products such as mobile phones, etc. In terms of battery cell materials, there is an increasing demand for lithium battery cells such as lithium-ion batteries and lithium-ion polymer batteries that have high energy density, discharge voltage, and output stability.

[0005] Currently, widely used types of secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of these battery cells is approximately 2.5V to 4.2V. If a higher output voltage is required, a battery module is formed by connecting multiple battery cells in series, and a battery package is formed by connecting multiple battery modules. Furthermore, a battery package is formed by connecting multiple battery cells in parallel depending on the charge / discharge capacity required for the battery package. As a result, the number of battery cells and the electrical connection structure of the battery package can be variously set depending on the required output voltage or charge / discharge capacity.

[0006] The battery package has a barrier beam installed across the interior of the pack case to divide the battery module storage space into multiple compartments. The battery package also has a thermal resin disposed between the underside of each battery module and the bottom plate of the pack case. This allows thermal energy generated in the battery module to be dissipated through the thermal resin and the bottom plate. To improve the heat dissipation performance of the battery package, a heat sink can be installed on the inside or outside of the bottom plate. A firewall can also be installed between multiple battery modules to prevent fires from spreading to adjacent battery modules.

[0007] However, the heat generated in the battery modules during the charging and discharging process of the battery package may not be effectively dissipated. In this case, heat accumulation occurs in some battery modules, which may cause deterioration of the battery modules, and the rapid deterioration may cause thermal runaway of the battery modules.

[0008] If thermal runaway occurs in one of the battery modules, heat can be rapidly transferred to adjacent battery modules through the thermal resin, which has excellent thermal conductivity, and the lower plate of the pack case, accelerating a chain reaction of thermal runaway, which increases the risk of fire and explosion in the battery package.

[0009] In addition, conventional technologies have focused on developing thermal resins to more quickly dissipate heat energy in the event of a battery module fire or thermal runaway. However, if thermal resins with excellent heat dissipation performance are used inside a battery package, when a battery module experiences thermal runaway, heat transfer to adjacent battery modules via the thermal resin and the bottom plate may be accelerated. This may further increase the risk of the battery package catching fire or exploding.

[0010] In addition, battery modules are constructed with a resin separator layered between the positive and negative electrodes. Polyethylene separators begin to break down at around 130°C, while polypropylene separators begin to break down at around 170°C. The electrolyte releases heat as it decomposes at around 200°C. As a result, the battery module rapidly deteriorates in a short period of time, and thermal runaway begins at around 600-800°C. This calls for technology to stop the chain reaction of thermal runaway before the battery module deteriorates to the thermal runaway starting temperature.

[0011] The background art of the present invention is disclosed in Korean Patent Publication No. 2022-0035770 (published on March 22, 2022, title of invention: Battery pack applying a structure for preventing heat diffusion between battery modules). Summary of the Invention [Problem to be solved by the invention]

[0012] The present invention has been devised to solve the above-mentioned problems, and an object of the present invention is to provide a battery package that can improve heat dissipation performance when the battery package is operating normally.

[0013] Another object of the present invention is to provide a battery package in which the thermoplastic resin turns into a ceramic material and functions as a heat insulating layer when the battery module experiences thermal runaway.

[0014] Another object of the present invention is to provide a battery package that can block heat generated during thermal runaway of a battery module from being transferred to a heater sink and a lower plate.

[0015] Another object of the present invention is to provide a battery package that can block high-temperature heat generated during thermal runaway of a battery module from being transmitted to an adjacent battery module via a lower plate or a heat sink.

[0016] Another object of the present invention is to provide a battery package that can prevent adjacent battery modules from causing a chain reaction of thermal runaway.

[0017] Another object of the present invention is to provide a battery package in which, even if some battery modules experience thermal runaway, the barrier beam can prevent thermal energy from diffusing or transferring to the adjacent storage space.

[0018] The technical object of the present invention is not limited to the above-mentioned objects, and other unmentioned objects and advantages of the present invention can be understood from the following description and can be more clearly understood from the examples of the present invention. Furthermore, it can be easily understood that the objects and advantages of the present invention can be achieved by the means and combinations thereof set forth in the claims. [Means for solving the problem]

[0019] In order to solve the above-mentioned problems, the battery package according to the present invention includes a pack case, a plurality of battery modules accommodated in an accommodation space of the pack case, a heat sink arranged on a lower plate of the pack case, and a thermal resin arranged between the battery modules and the heat sink.

[0020] The thermoplastic resin can be transformed into a heat insulating layer when heated above a predetermined temperature.

[0021] Before the modification, the thermoplastic resin can transfer heat from the battery module to the heat sink.

[0022] The thermoplastic resin can be transformed into a heat insulating layer when the battery module experiences thermal runaway.

[0023] The thermoplastic resin may be modified by converting it into a ceramic.

[0024] The modified thermoplastic resin may also include ceramics.

[0025] The modification of the thermoplastic resin may be achieved by the generation of pores.

[0026] The modified thermoplastic resin may contain pores.

[0027] The modified thermoplastic resin may include a ceramic having pores.

[0028] The predetermined temperature may be 200 degrees Celsius or higher.

[0029] The predetermined temperature may be equal to or lower than a thermal runaway temperature of the battery module, so that the thermoplastic resin can be converted into a ceramic and transformed into a heat insulating layer when the battery module experiences thermal runaway.

[0030] The predetermined temperature may be 800 degrees Celsius or less, preferably 600 degrees Celsius or less, and more preferably 550 degrees Celsius or less.

[0031] The thermoplastic resin may be formed by mixing a resin material with a filler.

[0032] The resin material and filler can be vaporized at a predetermined temperature or higher to become ceramic.

[0033] At least a portion of the resin material may be vaporized at or above the predetermined temperature. Vaporization of the resin material may form pores.

[0034] A portion of the resin material may be carbonized at or above the predetermined temperature.

[0035] The filler can be turned into a ceramic at or above the predetermined temperature.

[0036] The carbonized resin material can constitute a ceramic structure together with the filler.

[0037] The resin material may include at least one of a polymethyl methacrylate resin, an epoxy resin, and a urethane resin.

[0038] The filler may include at least one of a silicon filler, an aluminum filler, a carbon filler, and a hardener.

[0039] The thermoplastic resins may be arranged in one-to-one correspondence with the battery modules.

[0040] The thermal resins may be arranged so as to be separated from the thermal resins adjacent to the lower surfaces of the battery modules.

[0041] The heat sink may include a heat conduction panel formed in a plate shape so as to be in surface contact with the lower plate of the pack case and the thermal resin.

[0042] The heat sink may include cooling channels through which a cooling medium flows.

[0043] At least one barrier beam may be installed inside the pack case so as to partition the storage space for the battery modules. [Effects of the Invention]

[0044] According to the present invention, the thermal resin transfers the thermal energy generated in the battery module to the heat sink when the battery package is operating normally, thereby improving the heat dissipation performance when the battery package is operating normally.

[0045] According to the present invention, the thermoplastic resin becomes ceramic and functions as a heat insulating layer when the battery module experiences thermal runaway, thereby preventing the heat of approximately 600-800°C generated when the battery module experiences thermal runaway from being transmitted to the heater sink and lower plate.

[0046] According to the present invention, the thermal resin becomes ceramic when the battery module experiences thermal runaway, thereby preventing the high-temperature heat generated when the battery module experiences thermal runaway from being transmitted to adjacent battery modules via the lower plate or heat sink.

[0047] According to the present invention, even if some of the high-temperature heat generated in the battery module is transmitted to the heat sink through the ceramicized insulating layer, it is possible to prevent adjacent battery modules from causing a chain reaction of thermal runaway.

[0048] According to the present invention, multiple battery modules are kept isolated in their respective storage spaces by the barrier beams, so that even if some of the battery modules experience thermal runaway, the barrier beams can prevent thermal energy from diffusing or transferring to adjacent storage spaces.

[0049] According to the present invention, voids and spaces are generated inside the ceramicized heat insulating layer due to gas escaping, and the heat insulating performance of the heat insulating layer can be further improved by the voids and spaces.

[0050] The above-mentioned effects and specific effects of the present invention will be described in conjunction with the following description of the preferred embodiment of the invention. [Brief explanation of the drawings]

[0051] [Figure 1] 1 is a perspective view schematically illustrating a battery package according to the present invention; [Figure 2] 2 is a cross-sectional view schematically showing a state in which a heat sink and a thermal resin are installed under the battery package in FIG. 1. FIG. [Figure 3] 2 is a cross-sectional view schematically showing the II' cross section of the battery package in FIG. 1. FIG. [Figure 4] FIG. 2 is a cross-sectional view schematically showing an example of a heat sink of the battery package in FIG. [Figure 5] 1. FIG. 4 is a cross-sectional view schematically showing another example of the heat sink of the battery package in FIG. [Figure 6] 4 is a cross-sectional view schematically illustrating a state in which a battery module dissipates heat when the battery package according to the present invention is normally operated; [Figure 7] 1 is a schematic diagram of a thermoplastic resin for a battery package according to the present invention; [Figure 8] 10 is a cross-sectional view showing a state in which a thermal resin is turned into a ceramic and a heat insulating layer is formed when a thermal runaway occurs in the battery package according to the present invention; FIG. [Figure 9] 1 is a diagram illustrating the thermal transition phenomenon of a thermoplastic resin according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0052] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0053] The present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms and may be modified in various ways. However, these embodiments are provided to complete the disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. Therefore, the present invention is not limited to the embodiments disclosed below, and should be understood to include any modifications, equivalents, or alternatives within the technical spirit and scope of the present invention, as well as the substitution or addition of the configuration of any embodiment with the configuration of another embodiment.

[0054] The accompanying drawings are intended to facilitate understanding of the embodiments disclosed in this specification, and should not be construed as limiting the technical ideas disclosed in this specification, but should be understood to include any modifications, equivalents, or alternatives that fall within the spirit and technical scope of the present invention. The components in the drawings may be exaggerated in size or thickness for ease of understanding, but this should not be interpreted as limiting the scope of protection of the present invention.

[0055] The terms used in this specification are merely used to describe particular embodiments or examples and are not intended to limit the present invention. Furthermore, singular terms include plural terms unless the context clearly dictates otherwise. The terms "comprises," "constitutes," and the like in the specification are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification. In other words, the terms "comprises," "constitutes," and the like in the specification should not be understood to preclude the presence or possibility of adding one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0056] Although terms including ordinal numbers, such as first, second, etc., are used to describe various components, the components are not limited by the terms and are used only to distinguish one component from another.

[0057] When a component is referred to as being "coupled" or "connected" to another component, it should be understood that the component may be directly coupled or connected to the other component, but that there may be other components between them. On the other hand, when a component is referred to as being "directly coupled" or "directly connected" to another component, it should be understood that there are no other components between them.

[0058] When a component is referred to as being "on top of" or "under" another component, it should be understood that it is not only positioned directly on top of the other component, but that there may be other components in between.

[0059] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms similar to those defined in commonly used dictionaries should be interpreted to have a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0060] In the following, a battery package according to an embodiment of the present invention will be described.

[0061] FIG. 1 is a perspective view schematically showing a battery package according to the present invention, FIG. 2 is a cross-sectional view schematically showing a state in which a heat sink and thermal resin are installed at the bottom of the battery package in FIG. 1, FIG. 3 is a cross-sectional view schematically showing the I-I' cross section of the battery package in FIG. 1, FIG. 4 is a cross-sectional view schematically showing an example of a heat sink of the battery package in FIG. 1, and FIG. 5 is a cross-sectional view schematically showing another example of a heat sink of the battery package in FIG. 1.

[0062] 1 to 5, a battery package 100 according to an embodiment of the present invention includes a pack case 110, a plurality of battery modules 120, a heat sink 130, and a thermal resin 140.

[0063] The pack case 110 includes a lower plate 111, a side plate 112 that surrounds the periphery of the lower plate 111, and an upper plate 113 that covers an upper portion of the side plate 112. The lower plate 111 and the upper plate 113 are formed in a rectangular plate shape, and the side plate 112 is formed in a rectangular frame shape so as to surround the periphery of the lower plate 111 and the upper plate 113. The pack case 110 is formed of a material with excellent thermal conductivity, such as aluminum, so that it can dissipate thermal energy from the battery module 120.

[0064] At least one barrier beam 115 is installed inside the pack case 110 to partition the storage space 116 for the battery modules 120. The barrier beams 115 are installed across the inside of the pack case 110 to form a lattice-shaped storage space 116. The upper and lower sides of the barrier beam 115 have the form of a straight beam to support the lower plate 111 and the upper plate 113. In addition, the ends of the barrier beam 115 support the side plates 112. The barrier beam 115 prevents flames and gases in the storage space 116 from spreading to adjacent storage spaces 116. In addition, the barrier beam 115 reinforces the rigidity of the pack case 110. Therefore, even if external impacts or vibrations are transmitted to the pack case 110, the rigidity of the pack case 110 and the barrier beam 115 can prevent the battery package 100 from deforming or collapsing.

[0065] The plurality of battery modules 120 are respectively accommodated in the accommodation space 116 of the pack case 110. The battery module 120 is formed by stacking a plurality of battery cells. The battery cells may be cylindrical, prismatic, or pouch-shaped. The battery cells have a form in which an electrode assembly is impregnated with an electrolyte. The electrode assembly is formed by stacking or winding a negative electrode, a positive electrode, and a separator.

[0066] Terminals (not shown) of opposite polarities are connected to both sides of the battery module 120. The terminals of the battery module 120 are electrically connected to a plurality of bus bars (not shown) arranged on a bus bar frame (not shown). The bus bars may be connected in series or parallel depending on the capacity and output voltage of the battery package 100.

[0067] The heat sink 130 is disposed on the lower plate 111 of the pack case 110. The heat sink 130 may be disposed on the upper surface of the lower plate 111 or on the lower surface of the lower plate 111. The heat sink 130 may also be disposed inside the lower plate 111.

[0068] The heat sink 130 may include a thermal conduction panel 131 and a cooling channel 133 through which a cooling medium flows inside the thermal conduction panel 131 (see FIG. 4). The cooling channel 133 may be formed in a zigzag shape inside the heat sink 130. Alternatively, the cooling channel 133 may be formed in a straight line inside the heat sink 130. A cooling medium inlet (not shown) and a cooling medium outlet (not shown) are connected to the cooling channel 133. The cooling medium inlet and the cooling medium outlet may be connected to a cooling medium circulation pump (not shown). Various types of cooling medium may be used, such as cooling water or antifreeze.

[0069] The heat sink 130a may include a thermally conductive panel 131 formed in a plate shape so as to be in surface contact with the lower plate 111 of the pack case 110 and the thermal resin 140 (see FIG. 5). The thermally conductive panel may be formed in a rectangular plate shape having approximately the same size as the lower plate 111. The thermally conductive panel 131 may be made of aluminum, which has excellent thermal conductivity. No cooling channels are formed in the heat sink 130a.

[0070] FIG. 6 is a cross-sectional view showing the state in which the battery module dissipates heat during normal operation of the battery package according to the present invention, FIG. 7 is a diagram showing the thermal resin of the battery package according to the present invention, and FIG. 8 is a cross-sectional view showing the state in which the thermal resin becomes ceramic and forms an insulating layer during thermal runaway of the battery package according to the present invention.

[0071] The thermal resin 140 is disposed between the lower surface of the battery module 120 and the upper surface of the heat sink 130. When the battery package 100 is operating normally, the thermal resin 140 transfers the thermal energy generated in the battery module 120 to the heat sink 130 (see FIG. 6). As a result, when the battery package 100 is operating normally, the thermal resin 140 functions as a heat dissipation member or a heat conduction member that transfers the thermal energy generated in the battery module 120 to the heat sink 130. In FIG. 6, arrows indicate the dissipation of thermal energy when the battery module is operating normally.

[0072] Furthermore, the battery module 120a (see FIG. 8) may ignite or experience thermal runaway during the charge / discharge process. When the battery module 120a experiences thermal runaway, the thermal resin 140 becomes ceramic and functions as the heat insulating layer 142a (see FIG. 8). This allows the heat insulating layer 142a to block the heat of approximately 600-800°C generated during thermal runaway of the battery module 120 from being transferred to the heat sink 130 and the lower plate 111. As a result, the heat insulating layer 142a blocks the high-temperature heat generated in the igniting battery module 120a from being transferred to the adjacent battery module 120. Furthermore, even if some of the high-temperature heat generated in the battery module 120 is transferred to the heat sink 130 through the ceramicized heat insulating layer 142a, it is possible to prevent a chain reaction of thermal runaway in the adjacent battery module 120.

[0073] In addition, the multiple battery modules 120 are kept isolated in their respective storage spaces 116 by the barrier beams 115, so even if some of the battery modules 120 experience thermal runaway, the barrier beams 115 can prevent thermal energy from diffusing or transferring to adjacent storage spaces 116.

[0074] In this way, when some battery modules 120a experience thermal runaway, the ceramified thermal resin 142a blocks the thermal runaway chain reaction event via the lower plate 111 and the heat sink 130, and the barrier beam 115 prevents the thermal runaway chain reaction from occurring in the adjacent space.

[0075] In addition, the thermal resin 140, 142a according to the present invention can selectively implement a heat dissipation function and a heat insulation function depending on the temperature range of the battery module 120.

[0076] Since lithium ion batteries are known to experience thermal runaway at approximately 600-800° C., the thermal resin 140 of the present invention preferably becomes ceramic and transforms into the insulating layer 142a at approximately 450-550° C. Of course, since the thermal runaway temperature of the battery module 120 may vary depending on the composition of the constituent materials, the ceramicization temperature of the thermal resin 140 can be designed based on thermal runaway experiments of the battery module 120.

[0077] The thermal resin 140 may be a mixture of a resin material 141 that vaporizes and a filler 142 that transforms into a heat insulating layer 142a when the battery module 120 experiences thermal runaway. When the battery module 120 experiences thermal runaway, the gas that vaporizes from the resin material 141 may be discharged into the accommodation space 116 surrounded by the barrier beam 115, the ceramified thermal resin 142a, and the upper plate 113. When the resin material 141 vaporizes, the thermal resin 140 transforms into a heat insulating layer 142a. Furthermore, because voids and spaces are generated inside the ceramified heat insulating layer 142a as the gas escapes, the heat insulating performance of the heat insulating layer 142a can be further improved by the voids and spaces.

[0078] The resin material 141 may include at least one of polymethly methacrylate, epoxy resin, and urethane resin.

[0079] As the phosphate content of epoxy resin increases, the decomposition temperature of the resin composition increases and the amount of carbonized products increases. Furthermore, as the phosphate content of epoxy resin increases, the flame retardancy improves. Therefore, by adjusting the phosphate content, the ceramicization temperature of epoxy resin can be adjusted to about 450-550°C. The ceramicization temperature of urethane resin can also be adjusted by adjusting additives and flame retardant components. The epoxy resin and urethane resin are carbonized at the ceramicization temperature, forming char and voids.

[0080] The filler 142 may include at least one of a silicon filler, an aluminum filler, a carbon filler, and a hardening material.

[0081] FIG. 9 is a diagram schematically illustrating the thermal transition phenomenon of the thermoplastic resin according to the present invention.

[0082] Referring to FIG. 9, a case where the thermal resin 140 is a TIM (Thermal Interface Resin) will be described.

[0083] Copper sulfide (CuS), which is filler 142 (charger), is made by mixing oxide powders of silicon oxide (SiO2), iron oxide (Fe2O3), magnesium oxide (MgO), and aluminum oxide (Al2O3), heat treating the mixture at 1400°C, and then quenching it to produce ceramic composite powder. PMMA (Polymethly Methacrylate), which has a melting point of 200°C, is used as resin material 141, and copper sulfate (CuS), aluminum oxide (Al2O3), and silicon nitride (Si3N4) are used as filler 142, which provides heat dissipation.

[0084] When the filler 142 is mixed into the resin material 141, an air pocket 143 is formed between the filler 142 and the resin material 141. The air pocket 143 limits thermal conductivity but facilitates thermal radiation, which is characterized by heat transfer without a medium.

[0085] Meanwhile, when the thermal resin 140 is heated to about 600-800°C due to thermal runaway of the battery module 120a, the resin material 141 in the thermal resin 140 vaporizes. As a result, the thermal resin 140 (TIM material) between the heat sink 130 and the battery module 120 (heat source) becomes ceramic, forming a heat insulating layer 142a.

[0086] The thermal resin 140 is arranged in one-to-one correspondence with the battery module 120. This is because when the battery module 120 experiences thermal runaway, only the thermal resin 140 is turned into ceramic.

[0087] The thermal resins 140 are arranged separately from each other on the lower surface of the battery module 120. A barrier beam 115 is arranged between adjacent thermal resins 140. In this case, each thermal resin 140 may be installed so as to cover the entire lower surface of the accommodation space 116. This makes it possible to minimize the transfer of heat generated in a battery module 120a experiencing thermal runaway to an adjacent battery module 120 via the ceramicized thermal resin 142a and the heat sink 130.

[0088] Although the present invention has been described above with reference to illustrative drawings, it is clear that the present invention is not limited to the embodiments and drawings disclosed in this specification, and that various modifications can be made by those skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configurations of the present invention are not explicitly described in the above-described embodiments of the present invention, it is natural that the effects that can be predicted by the configurations should also be recognized. [Explanation of symbols]

[0089] 100 battery packages 110 pack case 111 Lower Plate 112 Side Plate 113 Upper Plate 115 Barrier Beam 116 Containment Space 120 Battery Module 120a Thermal Runaway Battery Module 130 Heatsink 131 Heat Conduction Panel 133 Cooling Channel 140 Thermal Resin 141 Resin substances 142 Filler 142a Insulation layer 143 Air Pocket

Claims

1. Pack case, a plurality of battery modules accommodated in the accommodation space of the pack case; a heat sink disposed on the lower plate of the pack case; and a thermal resin disposed between the battery module and the heat sink, which transfers heat from the battery module to the heat sink and which becomes ceramic and transforms into a heat insulating layer when the battery module experiences thermal runaway; Battery package.

2. The thermal resin is a mixture of a resin material that vaporizes when the battery module experiences thermal runaway and a filler that transforms into a heat insulating layer. The battery package of claim 1 .

3. The resin material includes at least one of polymethyl methacrylate resin, epoxy resin, and urethane resin. The battery package of claim 2 .

4. The filler includes at least one of a silicon filler, an aluminum filler, a carbon filler, and a hardener. The battery package of claim 2 .

5. The thermoplastic resin is arranged to correspond one-to-one with the battery module. The battery package according to any one of claims 1 to 4.

6. The thermoplastic resins are respectively disposed on the lower surfaces of the battery modules in a mutually separated state. The battery package according to any one of claims 1 to 4.

7. the heat sink includes a thermally conductive panel formed in a plate shape so as to be in surface contact with the lower plate of the pack case and the thermal resin. The battery package according to any one of claims 1 to 4.

8. The heat sink includes cooling channels through which a cooling medium flows. The battery package according to any one of claims 1 to 4.

9. At least one barrier beam is installed inside the pack case so as to partition the storage space for the battery module. The battery package according to any one of claims 1 to 4.

Images