Battery module

Abstract

A battery module is disclosed. A battery module according to one embodiment of the present invention includes a case defining an internal space, battery cells located inside the case, and a fireproof cover provided on one side of the case, the fireproof cover comprising a first sheet containing mica material and a second sheet containing metal wire material.

Description

Technical Field

[0001] The present invention relates to a battery module.

[0002] This application claims priority based on Korean Patent Application No. 10-2023-0125754 filed on September 20, 2023, and all of the contents disclosed in the specification and drawings of the application are incorporated into this application.

Background Art

[0003] As the demand for portable electronic products such as laptops, video cameras, and mobile phones has rapidly increased, and the commercialization of robots, electric vehicles, etc. has become full-scale, research on high-performance secondary batteries that can be repeatedly charged and discharged has been actively conducted.

[0004] Currently, commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium secondary batteries, etc. Among these, lithium secondary batteries have attracted attention because they can be freely charged and discharged because they hardly have a memory effect compared to nickel-based secondary batteries, have a very low self-discharge rate, and have a high energy density.

[0005] Such lithium secondary batteries mainly use a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate coated with such a positive electrode active material and a negative electrode plate coated with a negative electrode active material are arranged with a separator interposed therebetween, and an exterior material that hermetically stores the electrode assembly together with an electrolytic solution, for example, a battery case.

[0006] Generally, lithium secondary batteries can be classified into can-type secondary batteries in which an electrode assembly is stored in a metal can and pouch-type secondary batteries in which an electrode assembly is stored in a pouch made of an aluminum laminate sheet according to the shape of the exterior material.

[0007] In recent years, secondary batteries have been widely used not only in small devices such as portable electronic devices, but also in medium and large-scale devices such as electric vehicles and energy storage systems (ESS), for propulsion and energy storage. These secondary batteries are electrically connected and housed together inside a module case to form a single battery module. Furthermore, multiple such battery modules are connected to form a single battery pack.

[0008] However, when multiple secondary batteries (battery cells) or multiple battery modules are densely packed into a small space, they can be vulnerable to thermal events. In particular, if an event such as thermal runaway occurs in one battery cell, high-temperature gases, flames, and heat may be generated. If such gases, flames, and heat are transferred to other battery cells contained within the same battery module, an explosive chain reaction such as thermal propagation can occur. Furthermore, such a chain reaction can not only cause accidents such as fires and explosions in the battery module in question, but can also cause fires and explosions in other battery modules.

[0009] Furthermore, in the case of medium to large battery packs, such as those found in electric vehicles, the risk of chain reactions is even higher because they contain a large number of battery cells and battery modules in an attempt to increase output and / or capacity. Moreover, in the case of battery packs installed in electric vehicles, there may be users such as drivers in the vicinity. Therefore, if a thermal event generated in a specific battery cell or module cannot be properly controlled and a chain reaction occurs, it could lead to not only significant property damage but also loss of life. For this reason, it is necessary to properly control thermal events generated in battery cells and modules to suppress heat propagation. [Overview of the project] [Problems that the invention aims to solve]

[0010] The present invention aims to solve the problems described above and other problems.

[0011] Another object of the present invention is to provide a battery module with improved thermal safety when a thermal event occurs.

[0012] Another object of the present invention is to provide a battery module that, when a thermal event occurs, releases vent gas while suppressing the release of flames and flammable particles.

[0013] Another object of the present invention is to provide a battery module that allows for easy control of venting when a thermal event occurs. [Means for solving the problem]

[0014] To achieve the above objective, a battery module according to one aspect of the present invention includes a case defining an internal space, battery cells located inside the case, and a fireproof cover provided on one side of the case, the fireproof cover comprising a first sheet containing mica material and a second sheet containing metal wire material.

[0015] Furthermore, the first sheet may be bonded to one side of the case, and the second sheet may be bonded to the first sheet.

[0016] Furthermore, the fireproof cover may further include a third sheet bonded to the second sheet, the third sheet containing mica material.

[0017] Furthermore, the first sheet may have a plurality of first through holes, and the third sheet may have a plurality of second through holes.

[0018] Furthermore, the plurality of first through holes and the plurality of second through holes may be arranged alternately.

[0019] Further, the plurality of first through-holes may be configured to be larger than the plurality of second through-holes.

[0020] Further, the battery module may further include a fastening member that penetrates at least one of the first sheet and the third sheet and the second sheet.

[0021] Further, the first sheet may be attached to one surface of the case.

[0022] Further, the second sheet may include a mesh structure.

[0023] Further, one surface of the case may be provided with a vent hole.

[0024] Further, it may further include a wire connected to one surface of the case, and the fireproof cover may be provided with a connection hole through which the wire passes.

[0025] A battery pack according to another aspect of the present invention includes a battery module according to an aspect of the present invention.

[0026] Further, a plurality of the battery modules may be provided, and may include a fireproof cover located between the plurality of battery modules.

[0027] An automobile according to still another aspect of the present invention includes a battery module according to an aspect of the present invention.

Advantages of the Invention

[0028] According to one aspect of the present invention, when a thermal event occurs, a battery module with improved thermal safety can be provided.

[0029] According to one aspect of the present invention, when a thermal event occurs, a battery module that discharges vent gas while suppressing the discharge of flames and ignitable particles can be provided.

[0030] According to one aspect of the present invention, a battery module can be provided that allows for easy control of venting when a thermal event occurs.

[0031] The following drawings accompanying this specification illustrate preferred embodiments of the present invention and are intended to facilitate a better understanding of the technical concept of the invention, along with the detailed description of the invention. Therefore, the present invention is not to be construed as being limited solely to what is shown in the drawings. [Brief explanation of the drawing]

[0032] [Figure 1] This diagram shows a battery module according to one embodiment of the present invention. [Figure 2] This diagram shows a disassembled view of a portion of the battery module in Figure 1. [Figure 3] This diagram shows a disassembled fireproof cover of a battery module according to one embodiment of the present invention. [Figure 4] This diagram shows a cross-section of a battery module case with a fireproof cover attached, according to one embodiment of the present invention. [Figure 5] This diagram shows a cross-section of Figure 4 when a thermal event occurs. [Figure 6] This figure shows the deformed form of Figure 4. [Figure 7] This figure shows other variations of Figure 4. [Figure 8] This figure shows yet another modified form of Figure 4. [Figure 9] This figure shows yet another modified form of Figure 4. [Figure 10] This figure shows a battery module according to another embodiment of the present invention. [Figure 11] This figure shows a battery module according to yet another embodiment of the present invention. [Figure 12] Figure 3 shows a modified form of the fireproof cover. [Figure 13] This figure shows a battery module according to yet another embodiment of the present invention. [Figure 14] This figure shows the cross-sectional configuration along the cutting line A-A' in Figure 13. [Figure 15] This figure shows a battery module according to yet another embodiment of the present invention. [Figure 16] This figure shows the cross-sectional configuration along the cutting line B-B' in Figure 15. [Figure 17] This diagram shows a disassembled end fireproof cover of a battery module according to one embodiment of the present invention. [Figure 18] This diagram shows how wires are connected to a battery module according to one embodiment of the present invention. [Figure 19] This diagram shows a disassembled view of a portion of the battery pack according to one embodiment of the present invention. [Figure 20] Figure 19 is an illustrative diagram showing a battery module housed in a battery pack. [Figure 21] Figure 19 is an illustrative diagram showing a battery module housed in a battery pack. [Figure 22] Figure 21 is an illustrative diagram showing a cross-section of adjacent battery modules. [Figure 23] This figure shows an exploded view of a part of the battery pack according to another embodiment of the present invention. [Modes for carrying out the invention]

[0033] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Prior to this, terms and words used in this specification and in the claims shall not be interpreted in a manner limited to their general and dictionary meanings, but in accordance with the principle that inventors themselves may appropriately define the concepts of terms in order to best describe their invention, and shall be interpreted in a manner and concept corresponding to the technical idea of ​​the present invention.

[0034] Therefore, the embodiments described herein and the configurations shown in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the invention. It should be understood that there are various equivalents and modifications that can substitute for them at the time of this application.

[0035] Figure 1 shows a battery module according to one embodiment of the present invention, Figure 2 is a diagram showing a partial configuration of the battery module of Figure 1 in an exploded view, and Figure 3 is a diagram showing an exploded view of the fireproof cover 200 of the battery module according to one embodiment of the present invention.

[0036] Referring to Figures 1 to 3, a battery module according to one embodiment of the present invention may include a case 100, battery cells, and a fireproof cover 200. The case 100 may include a frame 110 and end covers 120. The frame 110 may be rectangular parallelepiped. The frame 110 may define space inside. The frame 110 may have an open front and rear shape. The end covers 120 may be plate-shaped. The end covers 120 may be coupled, fastened, or fixed to the open portion of the frame 110. The end covers 120 and the frame 110 may also be joined by welding. The end covers 120 may be provided in pairs. A pair of end covers 120 may cover the front and rear of the frame 110, respectively.

[0037] The battery cells may be located inside the case 100. The battery cells may be housed in the internal space provided by the frame 110. In this case, the battery cells may mean secondary batteries. The battery cells may be pouch-type secondary batteries. Multiple battery cells may be provided. Multiple battery cells may be arranged or stacked along one direction. For example, multiple battery cells may be arranged or stacked along the left-right direction or the Y-axis direction.

[0038] The fire protection cover 200 may be provided on one side of the case 100. In this case, the fire protection cover 200 may be provided on any one side of the frame 110 or on the end cover 120. Furthermore, multiple fire protection covers 200 may be provided. For example, the fire protection cover 200 may include a side fire protection cover 210 provided on the frame 110. Also, the fire protection cover 200 may include an end fire protection cover 220 provided on the end cover 120.

[0039] The fireproof cover 200 may include a first sheet 201 containing mica material. The first sheet 201 may have high heat resistance and flame resistance. In addition, one or the other side of the first sheet 201 may include a fireproof coating. The fireproof cover 200 may also include a second sheet 202 containing metal wire 122 material. For example, the second sheet 202 may include a material or structure such as steel wool.

[0040] According to this configuration of the present invention, the fireproof cover 200 can improve the thermal safety of the battery module. When a thermal event occurs, the first sheet 201 of the fireproof cover 200 can delay or block the propagation of heat and flames emitted from the battery module. The second sheet 202 can also delay or block the propagation of heat by forming an insulating air layer. Furthermore, the second sheet 202 can capture flames or flammable particles f emitted from the battery module. This can reduce or block the outward ejection of flames or flammable particles f emitted from the battery module.

[0041] Figure 4 shows a cross-section of a battery module case 100 with a fireproof cover 200 attached, according to one embodiment of the present invention, and Figure 5 shows the cross-section of Figure 4 when a thermal event occurs. Referring to Figures 1 to 5, the first sheet 201 of the fireproof cover 200 of the battery module according to one embodiment of the present invention can be attached to one side of the case 100. The second sheet 202 can also be attached to the first sheet 201.

[0042] According to this configuration of the present invention, the fireproof cover 200 can improve the thermal safety of the battery module. When a thermal event occurs, heat, gas g, flame, flammable particles f, etc., may be released from inside the battery module. This may cause the frame 110 or end cover 120 to melt. Flame, flammable particles f, etc., may be released through holes created by the melting of the frame 110 or end cover 120. The first sheet 201, by being bonded to the case 100, can delay or block the release of flame and flammable particles f. The second sheet 202 can collect flame or flammable particles f, etc., that have passed through the first sheet 201, and delay or block their release to the outside.

[0043] Referring to Figures 1 to 5, the fireproof cover 200 according to one embodiment of the present invention may further include a third sheet 203. The third sheet 203 may be bonded to the second sheet 202. The third sheet 203 may also contain mica material. The third sheet 203 may have high heat resistance and flame resistance. One or the other surface of the third sheet 203 may also contain a fireproof coating. The second sheet 202 may be located between the first sheet 201 and the third sheet 203.

[0044] According to this configuration of the present invention, the second sheet 202 can be stably fixed. The first sheet 201 and the third sheet 203 can stably support the second sheet 202.

[0045] Furthermore, according to this configuration of the present invention, the fireproof cover 200 can improve the thermal safety of the battery module. The second sheet 202 can delay or block the release of flames or flammable particles f to the outside. The third sheet 203 can delay or block the release of flames or flammable particles f that the second sheet 202 could not block. By comprising the first sheet 201, the second sheet 202, and the third sheet 203, the fireproof cover 200 can more reliably suppress heat propagation.

[0046] Referring to Figures 1 to 5, a fireproof cover 200 for a battery module according to one embodiment of the present invention may have a first through-hole 201a and a second through-hole 203a. The first through-hole 201a may be formed in the first sheet 201. Multiple first through-holes 201a may be provided. The second through-hole 203a may be formed in the third sheet 203. Multiple second through-holes 203a may be provided.

[0047] According to this configuration of the present invention, the fireproof cover 200 can improve the thermal safety of the battery module. When a thermal event occurs, flames, gases g, flammable particles f, etc., may be released to the outside of the case 100. The first sheet 201 can block the flames. Gases g, flammable particles f, etc., can flow into the second sheet 202 through the first through-hole 201a. The second sheet 202 can collect the flammable particles f, etc., and allow the gases g to pass through. The third sheet 203 can also allow the gases g to pass through through the second through-hole 203a. The fireproof cover 200 can suppress heat propagation by allowing gases g to be discharged while blocking flames and flammable particles f.

[0048] Referring to Figures 1 to 5, the multiple first through-holes 201a and the multiple second through-holes 203a of the fireproof cover 200 of the battery module according to one embodiment of the present invention can be arranged alternately.

[0049] According to this configuration of the present invention, the fireproof cover 200 can improve the thermal safety of the battery module. By arranging the first through-holes 201a and the second through-holes 203a alternately, the movement paths of gas g, flame, flammable particles f, etc., can be increased when a thermal event occurs. In addition, the distance that gas g, flame, flammable particles f, etc., travel through the second sheet 202 can be increased. As a result, the fireproof cover 200 can suppress heat propagation by allowing gas g to be discharged while more reliably blocking flame and flammable particles f.

[0050] Referring to Figures 1 to 5, a fireproof cover 200 for a battery module according to one embodiment of the present invention can be attached to one surface of the case 100. In particular, the first sheet 201 of the fireproof cover 200 can be attached to one surface of the frame 110 or the end cover 120.

[0051] With this configuration of the present invention, the fireproof cover 200 can adhere to or be tightly attached to the case 100, thereby more reliably blocking flames and flammable particles f.

[0052] Referring to Figures 1 to 5, the fireproof cover 200 for the battery module according to one embodiment of the present invention may include a mesh structure. The second sheet 202 may include a mesh structure. The mesh structure may include a metallic material. The mesh structure of the second sheet 202 may be made dense enough to capture flames and flammable particles f.

[0053] According to this configuration of the present invention, the fireproof cover 200 can more reliably capture flames and flammable particles f, thereby improving the thermal safety of the battery module.

[0054] Figure 6 shows a modified form of Figure 4. Referring to Figure 6, the multiple first through-holes 201a of the fireproof cover 200 of the battery module according to one embodiment of the present invention may be configured to be larger than the multiple second through-holes 203a.

[0055] With this configuration of the present invention, the pressure at which gas g is discharged from the third sheet 203 may be greater than the pressure at which gas g, flame, flammable particles f, etc., flow into the first sheet 201. This increases the time that flammable particles f pass through the second sheet 202, allowing for more reliable capture of flammable particles f.

[0056] Figure 7 shows another modified form of Figure 4. Referring to Figure 7, the fireproof cover 200 of the battery module of the present invention can be joined through fastening members. A nut N may be provided on the outer surface of the first sheet 201. For example, the nut N may be a PEM nut N fixed to the outer surface of the first sheet 201. Alternatively, a bolt B passing through the third sheet 203 may be fastened to the PEM nut N. The bolt B may also pass through the second sheet 202. The second sheet 202 may be fixed between the first sheet 201 and the third sheet 203.

[0057] With this configuration of the present invention, the first sheet 201, the second sheet 202, and the third sheet 203 can stably maintain their shape.

[0058] Figure 8 shows yet another variation of Figure 4, and referring to Figure 8, the fireproof cover 200 of the battery module of the present invention can be joined through fastening members. A nut N may be provided on the inner surface of the first sheet 201. For example, the nut N may be a PEM nut N fixed to the inner surface of the first sheet 201. Alternatively, a bolt B that passes through the first sheet 201 and the third sheet 203 can be fastened to the PEM nut N. The bolt B may also pass through the second sheet 202. The second sheet 202 may be fixed between the first sheet 201 and the third sheet 203.

[0059] With this configuration of the present invention, the first sheet 201, the second sheet 202, and the third sheet 203 can stably maintain their shape.

[0060] Figure 9 shows yet another variation of Figure 4. Referring to Figure 9, one side of the case 100 according to one embodiment of the present invention may be provided with a vent hole 101. In this case, the vent hole 101 may be provided in the frame 110 or the end cover 120. The vent hole 101 may also be positioned to communicate with the first through hole 201a of the first sheet 201.

[0061] According to this configuration of the present invention, when a thermal event occurs, gases g, flames, flammable particles f, etc., generated inside the case 100 can quickly flow into the fireproof cover 200 through the vent holes 101 and the first through-holes 201a. This improves the thermal safety of the battery module.

[0062] Figure 10 shows a battery module according to another embodiment of the present invention. Referring to Figure 10, a battery module according to one embodiment of the present invention may include a plurality of fireproof covers 200. A band 240 can stably secure the plurality of fireproof covers 200. The band 240 can stably secure the plurality of fireproof covers 200 to the case 100. The band 240 may be made of a metal material. Also, a plurality of bands 240 may be provided. For example, the band 240 may extend along the frame 110. Also, the band 240 may extend to surround the frame 110 and the end cover 120.

[0063] Figure 11 shows a battery module according to yet another embodiment of the present invention. Referring to Figure 11, a battery module according to one embodiment of the present invention may include a plurality of fireproof covers 200. The plurality of fireproof covers 200 may be connected, joined or fixed to one another through caulking. The plurality of fireproof covers 200 may also be fixed or tightly attached to the case 100 through caulking. The caulking may be made of a metallic material. Caulking portions 230 may be formed along the edges of the plurality of fireproof covers 200. The caulking portions 230 may be referred to as joint portions 230.

[0064] Figure 12 shows a modified form of the fireproof cover 200 of Figure 3, Figure 13 shows a battery module according to yet another embodiment of the present invention, and Figure 14 shows a cross-sectional configuration along the cutting line A-A' of Figure 13. Referring to Figures 12 to 14, the first sheet 201 may have a first through-hole 201a. The third sheet 203 may be configured without a through-hole. The first sheet 201, the second sheet 202, and the third sheet 203 may be joined together through caulking. In this case, the joining portion 230 may be formed along the periphery of the fireproof cover 200, and may not be formed in some sections. For example, the joining portion 230 may be formed on the upper edge, lower edge, and left edge of the fireproof cover 200, but may not be formed on the right edge. This allows the right edge of the fireproof cover 200 to be left open.

[0065] According to this configuration of the present invention, venting control becomes easier. When a thermal event occurs, gas g, flame, flammable particles f, etc., released from the battery module can flow into the fireproof cover 200 through the vent hole 101 or the first through-hole 201a. Also, since the third sheet 203 does not contain a through-hole, gas g can be discharged through the right edge of the fireproof cover 200 or the second sheet 202. In this case, flame and flammable particles f, etc., can be captured by the second sheet 202. By discharging gas g through the portion where no connecting part is formed, venting of the battery module can be easily controlled.

[0066] Figure 15 shows a battery module according to yet another embodiment of the present invention, and Figure 16 shows a cross-sectional configuration along the cutting line B-B' in Figure 15. Referring to Figures 15 and 16, the coupling portion 230 may be formed along the periphery of the fireproof cover 200, and may not be formed in some sections. For example, the coupling portion 230 may be formed on the lower edge, right edge, and left edge of the fireproof cover 200, but may not be formed on the upper edge. This allows the upper edge of the fireproof cover 200 to be left open.

[0067] According to this configuration of the present invention, gas g can be discharged through the upper edge or the second sheet 202 where no connecting portion is formed.

[0068] Referring to Figures 10 to 16, a battery module according to one embodiment of the present invention may include fireproof covers 200 of various shapes. Multiple fireproof covers 200 may be provided, and each fireproof cover 200 may have a different shape and structure. For example, the third sheet 203 of the fireproof cover 200 provided on the left and right sides of the frame 110 may not include through holes and may be configured to be vented upwards. Also, the first sheet 201 of the fireproof cover 200 provided on the upper side of the frame 110 may have a first through hole 201a, and the third sheet 203 may have a second through hole 203a. This allows the battery module as a whole to control upward ventilation.

[0069] With this configuration of the present invention, the ventilation of the battery module can be controlled in various directions by combining the structures of the fireproof cover 200 in various ways.

[0070] Figure 17 is a disassembled view of the end fireproof cover 220 of a battery module according to one embodiment of the present invention, and Figure 18 is a view showing the battery module with wire 122 connected according to one embodiment of the present invention.

[0071] Referring to Figures 17 and 18, a battery module according to one embodiment of the present invention may include a wire 122 connected to one side of the case 100. The wire 122 may be electrically and physically connected to a terminal 121 of the battery module. For example, the wire 122 may be electrically and physically connected to an output terminal 121 or a sensing terminal 121 of an end cover 120. The end fireproof cover 220 may also be provided with a connecting hole 221 through which the wire 122 passes.

[0072] According to this configuration of the present invention, the end fire cover 220 can cover the end cover 120 entirely, except for the portion where the connecting hole 221 is formed. This improves the performance of the fire cover 200 in suppressing heat propagation.

[0073] Figure 19 is an exploded view of a part of the battery pack according to one embodiment of the present invention, Figures 20 and 21 are illustrative diagrams showing battery modules housed in the battery pack of Figure 19, and Figure 22 is an illustrative diagram showing a cross-section of an adjacent battery module shown in Figure 21.

[0074] Referring to Figures 19 to 22, a battery pack according to one embodiment of the present invention may include a battery module according to one embodiment of the present invention. The battery pack may include a pack case 310 and a pack cover 320. The pack case 310 may define a space inside. The pack case 310 may have an open top shape. The pack case 310 may also be rectangular parallelepiped. The battery pack may include a plurality of battery modules. The plurality of battery modules may be housed in the space provided by the pack case 310. The pack cover 320 may be coupled, fastened, or fixed to the open part of the pack case 310. The pack cover 320 may cover the internal space of the pack case 310. The plurality of battery modules may be arranged in rows or stacked. A fireproof cover 200 may be located between adjacent battery modules. Alternatively, a fireproof cover 200 may be located between adjacent cases 100. In this case, one or two fireproof covers 200 may be provided.

[0075] With this configuration of the present invention, heat propagation can be suppressed by positioning the fireproof cover 200 between adjacent cases 100.

[0076] Referring to Figures 21 and 22, two fireproof covers 200 can be positioned between adjacent cases 100. The two fireproof covers 200 can be in contact with each other. Also, the two third sheets 203 can be in contact with each other. In this case, the second through holes 203a formed in each third sheet 203 can be positioned alternately.

[0077] According to this configuration of the present invention, the alternating arrangement of the second through-holes 203a suppresses heat propagation to adjacent battery modules 10. Furthermore, it is possible to suppress or block the inflow of gases g, flames, flammable particles f, etc., released from adjacent battery modules 10 through the second through-holes 203a.

[0078] Figure 23 is an exploded view of a part of the battery pack according to another embodiment of the present invention. Referring to Figure 23, the battery pack may include a partition wall 330. The partition wall 330 may partition the internal space of the pack case 310. The battery module 10 may be housed in the space partitioned by the partition wall 330.

[0079] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. The fireproof cover 200 and partition wall 330 of the battery module 10 can more reliably suppress heat propagation.

[0080] Furthermore, a battery pack according to one embodiment of the present invention may further include a variety of components, such as a battery management system (BMS), busbars, relays, current sensors, and other components of a battery pack known at the time of filing of the present invention.

[0081] An automobile according to one embodiment of the present invention includes the battery module according to the present embodiment of the present invention described above. A battery pack according to one embodiment of the present invention may be applied to automobiles such as electric vehicles and hybrid vehicles. Furthermore, an automobile according to one embodiment of the present invention may further include a variety of other components included in the automobile in addition to such a battery pack, such as a vehicle body, motors, and control devices such as an electronic control unit (ECU).

[0082] On the other hand, while terms indicating direction such as up, down, left, right, front, and back are used in this specification, these terms are used for convenience of explanation, and it is obvious to those skilled in the art that they can change depending on the position of the object being examined, the position of the observer, etc.

[0083] As described above, the present invention has been explained with limited embodiments and drawings, but it goes without saying that the present invention is not limited thereto, and that various modifications and variations are possible within the equivalent scope of the technical idea and claims of the present invention by persons with ordinary skill in the art to which the present invention pertains. [Explanation of symbols]

[0084] 10 Battery Modules 100 cases 101 Vent holes 110 frames 120 End Cover 121 Terminals / Output Terminals / Sensing Terminals 122 Metal wire / wire 200 Fireproof Cover 201 Sheet 1 201a 1st through hole 202, Seat 2 203 Third Seat 203a 2nd through hole 210 Side Fireproof Cover 220 End Fireproof Cover 221 Connection hole 230 Caulking part / joint part 240 bands 310 Pack Case 320 Pack Cover 330 Partition wall

Claims

1. Cases that define the interior space, A battery cell located inside the aforementioned case, A fireproof cover provided on one side of the aforementioned case, comprising a first sheet containing mica material and a second sheet containing metal wire material, A battery module including this.

2. The first sheet is bonded to one side of the case. The battery module according to claim 1, wherein the second sheet is bonded to the first sheet.

3. The battery module according to claim 2, wherein the fireproof cover further comprises a third sheet bonded to the second sheet, the third sheet containing mica material.

4. The first sheet is provided with a plurality of first through holes, The battery module according to claim 3, wherein the third sheet has a plurality of second through holes.

5. The battery module according to claim 4, wherein the plurality of first through holes and the plurality of second through holes are arranged alternately.

6. The battery module according to claim 4, wherein the plurality of first through holes are larger than the plurality of second through holes.

7. The battery module according to claim 4, further comprising a fastening member that penetrates at least one of the first sheet and the third sheet and the second sheet.

8. The battery module according to claim 1, wherein the first sheet is attached to one surface of the case.

9. The battery module according to claim 1, wherein the second sheet includes a mesh structure.

10. The battery module according to claim 1, wherein one side of the case is provided with a vent hole.

11. The case further includes a wire connected to one side of the case, The battery module according to claim 1, wherein the fireproof cover is provided with a connecting hole through which the wire passes.

12. A battery pack comprising the battery module according to any one of claims 1 to 11.

13. Multiple battery modules are provided. The battery pack according to claim 12, further comprising a fireproof cover located between a plurality of the battery modules.

14. An automobile comprising a battery module according to any one of claims 1 to 11.

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