Battery pack

Abstract

A battery pack according to an embodiment of the present invention may include a base plate, a battery module disposed on the base plate and having a first vent hole on an upper surface thereof, a vent cover coupled to an upper surface of the battery module, a pack cover covering the vent cover, and an elastic member disposed between the vent cover and the pack cover.

Description

[Technical Field]

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

[0002] This application claims priority based on Korean Patent Application No. 10-2023-0051029 filed on April 18, 2023, and Korean Patent Application No. 10-2024-0037931 filed on March 19, 2024, the entire contents of which are incorporated herein by reference in their entirety in their specifications and drawings. [Background technology]

[0003] With the demand for portable electronic products such as smartphones, tablet PCs, and smartwatches increasing significantly and electric vehicles gradually becoming more widespread, active research is being conducted on the batteries used in these products, especially secondary batteries that can be repeatedly charged and discharged.

[0004] Currently commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries. Of these, lithium secondary batteries are attracting attention due to their advantages of being free to charge and discharge because they have almost no memory effect compared to nickel-based secondary batteries, an extremely low self-discharge rate, and a high energy density.

[0005] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as the positive and negative electrode active materials, respectively, and include an electrode assembly in which a separator is sandwiched between positive and negative electrode plates coated with the positive and negative electrode active materials, and an exterior case, i.e., a battery case, that hermetically houses the electrode assembly together with an electrolyte.

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

[0007] Recently, secondary batteries have been widely used for driving and storing energy not only in small devices such as portable electronic devices but also in medium- to large-sized devices such as electric vehicles and energy storage systems (ESS). A battery module can be formed by electrically connecting multiple secondary batteries and storing them together inside a module case. Each secondary battery included in a battery module can be referred to as a battery cell. A battery pack can be formed by connecting multiple battery modules.

[0008] However, when a battery pack includes multiple battery modules, each of which includes multiple battery cells, the battery pack may be vulnerable to thermal chain reactions between the battery modules or between the battery cells. For example, if an event such as thermal runaway occurs in a battery module, it is necessary to prevent the propagation of the thermal runaway to other battery modules or other battery cells. If the propagation of thermal runaway between battery modules or battery cells is not properly prevented, an event occurring in a specific battery module or battery cell may trigger a chain reaction of thermal reactions in other battery modules or other battery cells, potentially causing or escalating an explosion or fire.

[0009] In particular, if an event such as thermal runaway occurs in a battery module, gases, flames, etc. may be randomly emitted to the outside. If the emission of gases, flames, etc. is not properly controlled, the gases, flames, etc. may be emitted toward other battery modules, potentially causing a thermal chain reaction in the other battery modules. In particular, module terminals and components for electrically connecting to other battery modules and battery packs, such as module bus bars, may be present at the front side of a battery module. Therefore, if a flame is emitted toward the front side of such a battery module, it may damage the module terminals within the battery pack, causing an electrical short. Furthermore, because other battery modules may be present in front of a battery module, if a flame is emitted toward the front side of a specific battery module, the emitted flame may be directed toward other battery modules, potentially causing the fire to spread between battery modules.

[0010] If heat transfer between battery modules or battery cells is not properly controlled, the voltage of the battery module or battery pack may drop rapidly, which may cause a sudden shutdown of the device to which the battery module or battery pack is attached, resulting in unexpected damage. For example, if the voltage of the battery pack suddenly drops while an electric vehicle is in operation, there may not be enough time to move the electric vehicle to a safe location.

[0011] Furthermore, if heat transfer between battery modules or battery cells cannot be properly controlled and a fire or explosion occurs suddenly, there is a high possibility that it will cause loss of life to users. For example, if thermal runaway occurs in an electric vehicle, passengers may not be able to escape safely unless a certain amount of time is allowed before it develops into a full-scale fire. Summary of the Invention [Problem to be solved by the invention]

[0012] Therefore, the present invention has been made to solve the above problems, and aims to provide a battery pack having an improved structure that can appropriately control the discharge of flames and the like generated inside a battery module, and a vehicle including the same.

[0013] However, the technical problems that the present invention aims to solve are not limited to the above problems, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention provided below. [Means for solving the problem]

[0014] To achieve the above object, a battery pack according to one embodiment of the present invention may include a base plate, a battery module disposed on the base plate and having a first vent hole on an upper surface thereof, a vent cover coupled to an upper surface of the battery module, a pack cover covering the vent cover, and an elastic member positioned between the vent cover and the pack cover.

[0015] The elastic member may also be secured between the vent cover and the pack cover.

[0016] Additionally, the resilient member may be compressed between the vent cover and the pack cover.

[0017] The elastic member may also be attached to the upper surface of the vent cover.

[0018] Furthermore, a plurality of the elastic members may be provided.

[0019] The vent cover may include a first cover coupled to an upper surface of the battery module and covering the first vent hole.

[0020] The first cover may also include a separation line facing the first vent hole.

[0021] The separation line may also be configured to be detachable from the battery module upon a thermal event.

[0022] The separation line may also extend along the periphery of the first vent hole.

[0023] The vent cover may further include a second cover coupled to an upper surface of the first cover.

[0024] The second cover may also include a second vent hole that exposes the separation line.

[0025] In addition, the first vent hole and the second vent hole may be configured to communicate with each other when a thermal event occurs in the battery module.

[0026] An automobile according to one embodiment of the present invention includes the battery pack of the present invention. [Effects of the Invention]

[0027] According to at least one of the embodiments of the present invention, when gas or flame occurs inside a battery module, the discharge of such gas or flame can be appropriately controlled.

[0028] According to at least one of the embodiments of the present invention, the electrical safety of the battery pack can be improved.

[0029] According to at least one of the embodiments of the present invention, heat propagation can be suppressed.

[0030] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to further understand the technical concepts of the present invention. Therefore, the present invention should not be interpreted as being limited to only the matters described in the drawings. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a diagram showing a battery pack according to an embodiment of the present invention; [Figure 2] FIG. 2 is a view showing the pack cover of the battery pack of FIG. 1 in isolation. [Figure 3] FIG. 2 is a diagram showing a partial configuration of the battery pack of FIG. 1 in an separated state. [Figure 4] 4 is a diagram showing a battery module of the battery pack of FIG. 3. [Figure 5] FIG. 5 is an exploded view showing a partial configuration of the battery module of FIG. 4. [Figure 6] 4 is a view showing the battery module, the vent cover, and the elastic member of FIG. 3 in a separated state. FIG. [Figure 7] FIG. 7 illustrates the combination of the configurations of FIG. 6. [Figure 8] FIG. 3 is a diagram showing a cross-sectional configuration taken along the line BB′ in FIG. 2. [Figure 9] FIG. 2 is a diagram showing a cross-sectional configuration taken along the line AA' in FIG. [Figure 10] 10 is a diagram showing the cross-sectional configuration of FIG. 9 when a thermal event occurs. DETAILED DESCRIPTION OF THE INVENTION

[0032] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and phrases used in the specification and claims should not be construed as being limited to their ordinary and dictionary meanings, but should be construed as having meanings and concepts corresponding to the technical ideas of the present invention, in accordance with the principle that the inventors themselves can appropriately define the concepts of terms in order to best describe the invention.

[0033] Therefore, it should be understood that the configurations shown in the embodiments described in this specification are merely the most desirable embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and that there may be various equivalents and modifications that can be substituted for them at the time of this application.

[0034] Fig. 1 is a diagram showing a battery pack according to one embodiment of the present invention. Fig. 2 is a diagram showing a pack cover 150 of the battery pack in Fig. 1 in an exploded state. Fig. 3 is a diagram showing a partial configuration of the battery pack in Fig. 1 in an exploded state.

[0035] 1 to 3, a battery pack according to an embodiment of the present invention may include a base plate 110, a battery module 200, a vent cover 400, a pack cover 150, and an elastic member 500.

[0036] The base plate 110 may have a rectangular shape. The base plate 110 may have a flat plate shape. The base plate 110 may form the exterior of the battery pack. The base plate 110 may provide an internal space for the battery pack.

[0037] A plurality of battery modules 200 may be provided. The battery modules 200 may be installed, fastened, coupled, fixed, or attached to the upper surface of the base plate 110. The battery module 200 may have a first vent hole 211 on the upper surface. The first vent hole 211 may communicate between the inside and the outside of the battery module 200. A plurality of first vent holes 211 may be provided. When a thermal event occurs in the battery module 200, vent gas g (see FIG. 10 ) may be discharged through the first vent hole 211.

[0038] The vent cover 400 may be installed, fastened, coupled, fixed, or attached to the upper surface of the battery module 200. The vent cover 400 may facilitate the discharge of vent gas g. In addition, the vent cover 400 may protect the battery module 200 from flames or vent gas g generated outside the battery module 200.

[0039] The pack cover 150 may have a rectangular plate shape. The pack cover 150 may have a flat plate shape. The pack cover 150 may form the exterior of the battery pack. The pack cover 150 may cover the internal space of the battery pack.

[0040] The elastic member 500 may be located between the vent cover 400 and the pack cover 150. The elastic member 500 may provide a restoring force RF (see FIG. 10 ) to the vent cover 400. The elastic member 500 may also provide a restoring force RF to the pack cover 150.

[0041] When a thermal event occurs in the battery module 200, the vent gas g can be discharged at high pressure, which can separate the vent cover 400 from the battery module 200.

[0042] According to this configuration of the present invention, the thermal safety of the battery pack can be improved. The elastic member 500 provides a restoring force RF to the vent cover 400, thereby stably maintaining the connection between the vent cover 400 and the battery module 200.

[0043] 1 to 3, a battery pack according to an embodiment of the present invention may include a side wall 120 and a partition wall 300.

[0044] The sidewalls 120 may be installed, fastened, coupled, fixed, or attached to the upper surface of the base plate 110. There may be four sidewalls 120. The sidewalls 120 may be arranged along the periphery of the base plate 110. The sidewalls 120 may form the exterior of the battery pack. The sidewalls 120 may provide an internal space. The battery module 200 may be surrounded by the sidewalls 120.

[0045] The partition wall 300 may include a first partition wall 301 and a second partition wall 302. A plurality of partition walls 300 may be provided. The partition wall 300 may be installed, fastened, fixed, coupled, or attached to the upper surface of the base plate 110. The partition wall 300 may partition the internal space of the battery pack. Battery modules 200 may be located in the spaces partitioned by the partition walls 300. The partition wall 300 may face at least one side of the battery modules 200.

[0046] The pack cover 150 may have a rectangular plate shape. The pack cover 150 may have a flat plate shape. The pack cover 150 may form the exterior of the battery pack. The pack cover 150 may cover the internal space of the battery pack. The pack cover 150 may be installed, fastened, coupled, fixed, or attached to the side wall 120. The pack cover 150 may also be installed, fastened, coupled, fixed, or attached to the partition wall 300. The pack cover 150 may also cover the top surface of the battery module 200.

[0047] The fastening member 160 can fasten the base plate 110 and the side wall 120 together. In addition, the fastening member 160 can fasten the base plate 110 and the partition wall 300 together.

[0048] Fig. 4 is a diagram showing a battery module 200 of the battery pack of Fig. 3. Fig. 5 is a diagram showing a partial configuration of the battery module 200 of Fig. 4 in an separated state.

[0049] 3 to 5, a battery module 200 of a battery pack according to an embodiment of the present invention may include a case 210, a plurality of battery cells 220, a pad 250, a bus bar frame assembly 230, and an end cover 240.

[0050] The case 210 may have a rectangular parallelepiped shape. The case 210 may also be referred to as a frame 210. The case 210 may provide a space inside. The case 210 may have an upper surface, a lower surface, and a pair of side surfaces. The case 210 may also have an open front and rear surface. The case 210 may have a first vent hole 211 on the upper surface. The first vent hole 211 may connect the inside and outside of the case 210.

[0051] The plurality of battery cells 220 may be stacked in the left-right direction, i.e., the Y-axis direction. In this case, the battery cell 220 may refer to a secondary battery. The battery cell 220 may include a housing 221 having an electrode assembly, a first sealing portion 222 protruding from the front and rear sides of the housing 221, and a second sealing portion 223 protruding from an upper side of the housing 221. The battery cell 220 may also include electrode leads 224 protruding from the front and rear sides of the first sealing portion 222, respectively. In particular, the battery cell 220 may be a pouch-type secondary battery. Each battery cell 220 may extend along the front-rear direction, i.e., the X-axis direction. The electrode leads 224 may protrude from the front and rear of each battery cell 220.

[0052] The pads 250 may be disposed between the plurality of battery cells 220. The pads 250 may be disposed between at least some of the battery cells 220 and / or on the outer periphery of the stack. For example, the pads 250 may be configured to be disposed between every four battery cells 220 stacked in the left-right direction.

[0053] Such a pad 250 may include an elastic material capable of absorbing swelling of the battery cell 220. For example, the pad 250 may be made of a foam material such as polyurethane. Alternatively, the pad 250 may include a material capable of blocking heat, flames, etc. For example, the pad 250 may include a heat insulating or fire-retardant material such as silicone or mica.

[0054] The bus bar frame assemblies 230 may be provided at the front and rear of the plurality of battery cells 220. The bus bar frame assemblies 230 may be electrically connected to the electrode leads 224 of the plurality of battery cells 220.

[0055] The pair of end covers 240 may be respectively coupled to the front and rear of the case 210. The pair of end covers 240 may cover the front and rear surfaces of the case 210. The end covers 240 may have a rectangular shape.

[0056] Fig. 6 is a diagram showing the battery module 200, the vent cover 400, and the elastic member 500 of Fig. 3 in isolation. Fig. 7 is a diagram showing the assembly of the configuration of Fig. 6.

[0057] 3, 6 and 7, the elastic member 500 of the battery pack according to an embodiment of the present invention may be installed, fastened, coupled, fixed, or attached to the upper surface of the vent cover 400.

[0058] According to this configuration of the present invention, the elastic member 500 can stably provide a restoring force RF to the vent cover 400. As a result, the coupled state between the vent cover 400 and the battery module 200 can be stably maintained.

[0059] 3, 6 and 7, a battery pack according to an embodiment of the present invention may include a plurality of elastic members 500.

[0060] According to this configuration of the present invention, the plurality of elastic members 500 can stably provide a restoring force RF to the vent cover 400. The coupled state of the vent cover 400 and the battery module 200 can be stably maintained.

[0061] 3, 6 and 7, a vent cover 400 of a battery pack according to an embodiment of the present invention may include a first cover 410.

[0062] The first cover 410 may be installed, fastened, coupled, fixed, or attached to the top surface of the battery module 200. The first cover 410 may also be installed, fastened, coupled, fixed, or attached to at least one side surface of the battery module 200.

[0063] The first cover 410 may be configured to cover the first vent holes 211. The first cover 410 may entirely cover the plurality of first vent holes 211. The first cover 410 may include a heat-resistant material.

[0064] This configuration of the present invention can improve the thermal safety of the battery pack. The first cover 410 can prevent or block flames or vent gases (g) generated outside the battery module 200 from entering the inside of the battery module 200 through the first vent hole 211. This can suppress the propagation of a thermal event.

[0065] 3, 6 and 7, the first cover 410 of the battery pack according to the embodiment of the present invention may have a separation line 411 facing the first vent hole 211.

[0066] The term "score line 411" can be used as a general term that encompasses a perforated line 411, a notching line 411, a cutting line 411, a shredding line 411, a tear line 411, or a separation line 411. The separation line 411 can be configured to be easily separated by applying pressure to the first cover 410.

[0067] This configuration of the present invention can improve the thermal safety of the battery module 200. When a thermal event occurs inside the battery module 200, the vent gas g can push out the separation line 411 through the first vent hole 211, separating at least a portion of the first cover 410 or forming a hole. This allows the inside and outside of the battery module 200 to communicate with each other, allowing the vent gas g to be discharged to the outside of the battery module 200.

[0068] Furthermore, according to this configuration of the present invention, the first cover 410 can prevent or block high-temperature gas or ignitable particles generated from outside the battery module 200 from flowing into the inside of the case 210. As a result, it is possible to block the propagation of a thermal event to the battery cells 220 inside the case 210.

[0069] 3, 6, and 7, a separation line 411 of a first cover 410 of a battery pack according to an embodiment of the present invention may be configured to be detachable from the battery module 200 when a thermal event occurs. The separation line 411 may form a separation region 412. The separation region 412 may be an area surrounded by the separation line 411.

[0070] The separation region 412 may face the first vent hole 211. Also, the separation region 412 may face at least a portion of the plurality of battery cells 220. Alternatively, the first cover 410 or the separation region 412 may face at least a portion of the upper surfaces of the plurality of battery cells 220.

[0071] This configuration of the present invention can improve the thermal safety of the battery module 200. When a thermal event occurs, the separation region 412 can be separated from the first cover 410. The vent gas g can be discharged to the outside through a hole formed by separating the first vent hole 211 and the separation region 412.

[0072] 3, 6, and 7, the separation line 411 of the battery pack according to an embodiment of the present invention may extend along the periphery of the first vent hole 211. Alternatively, the separation line 411 may be formed inside the region facing the first vent hole 211.

[0073] This configuration of the present invention can improve the thermal safety of the battery pack. When a thermal event occurs inside the battery module 200, the separation line 411 can be easily separated. This allows the vent gas (g) to be smoothly discharged.

[0074] 3, 6, and 7, a vent cover 400 of a battery pack according to an embodiment of the present invention may include a second cover 420. The vent cover 400 may be used as a general term for the first cover 410 and the second cover 420.

[0075] The second cover 420 may be installed, fastened, coupled, fixed, or attached to the top surface of the first cover 410. The second cover 420 may be installed, fastened, coupled, fixed, or attached to at least one side surface of the first cover 410. The second cover 420 may include a heat-resistant material or a fire-resistant material. For example, the second cover 420 may include a mica material. The second cover 420 may be made of a material that is harder than the first cover 410.

[0076] This configuration of the present invention can improve the thermal safety of the battery pack. The second cover 420 can protect the battery module 200 from an external fire, thereby suppressing the propagation of a thermal event.

[0077] Furthermore, according to this configuration of the present invention, since the second cover 420 includes a material with high hardness, it is possible to prevent or suppress the first cover 410 from being separated from the battery module 200. The coupled state of the first cover 410 and the battery module 200 can be stably maintained.

[0078] 3, 6, and 7, the second cover 420 of the battery pack according to one embodiment of the present invention may include a second vent hole 421. The second vent hole 421 may be positioned to expose the separation line 411.

[0079] This configuration of the present invention can improve the thermal safety of the battery module 200. When a thermal event occurs, the separation region 412 can be separated from the first cover 410. The vent gas g can be discharged to the outside through the first vent hole 211, a hole formed by separating the separation region 412, and the second vent hole 421.

[0080] FIG. 8 is a diagram illustrating a cross-sectional configuration along the section line B-B' in FIG. 2. FIG. 9 is a diagram illustrating a cross-sectional configuration along the section line A-A' in FIG. 1. Referring to FIGS. 8 and 9, the elastic member 500 of the battery pack according to an embodiment of the present invention may be compressed between the vent cover 400 and the pack cover 150. When the pack cover 150 is fastened to the side wall 120 or the partition wall 300, the pack cover 150 may pressurize the elastic member 500. For example, before the pack cover 150 is fastened to the side wall 120 or the partition wall 300, the height h1 of the elastic member 500 may be 14 mm. Furthermore, when the pack cover 150 is fastened to the side wall 120 or the partition wall 300, the height h2 of the elastic member 500 may be compressed to 8 mm.

[0081] This configuration of the present invention can improve the thermal stability of the battery pack. The compressed elastic member 500 can provide a restoring force RF to the vent cover 400. This can stably maintain the combined state between the vent cover 400 and the battery module 200.

[0082] 8 and 9, the elastic member 500 of the battery pack according to one embodiment of the present invention may be fixed between the vent cover 400 and the pack cover 150. The elastic member 500 may be fixed by being compressed by the pack cover 150 and the vent cover 400. In addition, the elastic member 500 may be installed, fastened, coupled, fixed, or attached to the upper surface of the second cover 420.

[0083] This configuration of the present invention can improve the thermal stability of the battery pack. The compressed elastic member 500 can provide a restoring force RF to the vent cover 400. This can stably maintain the combined state between the vent cover 400 and the battery module 200.

[0084] 9 when a thermal event occurs. Referring to FIG. 9 and FIG. 10, the first vent hole 211 and the second vent hole 421 of the battery pack according to an embodiment of the present invention may be configured to communicate with each other when a thermal event occurs.

[0085] When a thermal event occurs in the battery cell 220, vent gas g may be generated. The vent gas g may pressurize the separation region 412 upward, i.e., in the +Z-axis direction, through the first vent hole 211 of the case 210. As a result, the separation region 412 may be separated from the first cover 410. Furthermore, as the separation region 412 is separated, a hole may be formed in the first cover 410. As a result, the first vent hole 211 and the second vent hole 421 may be in communication with each other. The vent gas g may be discharged to the outside of the battery module 200 through the first vent hole 211, the hole formed in the first cover 410, and the second vent hole 421. At this time, the elastic member 500 may provide a restoring force RF to the vent cover 400.

[0086] This configuration of the present invention can improve the thermal safety of the battery module 200. When a thermal event occurs, the vent gas g can be easily discharged. In addition, the connection between the vent cover 400 and the battery module 200 can be stably maintained.

[0087] In addition, the battery pack according to the present invention may further include various other components in addition to the battery module, for example, various battery pack components known at the time of filing of the present invention, such as a BMS, a bus bar, a relay, and a current sensor.

[0088] The battery pack according to the present invention can be applied to automobiles such as electric automobiles and hybrid automobiles. That is, the automobile according to the present invention can include the battery pack according to the present invention. Furthermore, the automobile according to the present invention can further include various other components included in the automobile in addition to the battery pack. For example, the automobile according to the present invention can further include a vehicle body, a motor, a control device such as an ECU (electronic control unit), etc.

[0089] Although the present invention has been described above using limited embodiments and drawings, it goes without saying that the present invention is not limited thereto, and that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention pertains within the technical spirit of the present invention and the equivalent scope of the claims set forth below. [Explanation of symbols]

[0090] 110 base plate 120 sidewall 150 pack covers 160 Fastening members 200 Battery Module 210 cases 211 1st Vent Hole 220 battery cells 221 Storage area 222 First seal part 223 Second seal part 224 Electrode Lead 230 Busbar Frame Assembly 240 End cover 250 pads 300 Partition Wall 301 First Partition Wall 302 Second Partition Wall 400 Vent Cover 410 First Cover 411 Separation line 412 Separation area 420 Second Cover 421 Second Vent Hole 500 Elastic member

Claims

1. A base plate and a battery module disposed on the base plate and having a first vent hole on an upper surface thereof; a vent cover coupled to an upper surface of the battery module; a pack cover that covers the vent cover; an elastic member positioned between the vent cover and the pack cover.

2. The elastic member is The battery pack of claim 1 , wherein the battery pack is secured between the vent cover and the pack cover.

3. The elastic member is 10. The battery pack of claim 1, compressed between the vent cover and the pack cover.

4. The elastic member is The battery pack of claim 1 attached to the top surface of the vent cover.

5. The elastic member is The battery pack according to claim 1 , wherein a plurality of battery packs are provided.

6. The vent cover is The battery pack of claim 1 , further comprising: a first cover coupled to an upper surface of the battery module and covering the first vent hole.

7. The first cover is The battery pack according to claim 6 , further comprising a separation line facing the first vent hole.

8. The separation line is The battery pack of claim 7 , configured to be detachable from the battery module upon a thermal event.

9. The separation line is The battery pack according to claim 7 , wherein the first vent hole extends along the periphery of the first vent hole.

10. The vent cover is The battery pack according to claim 7 , further comprising a second cover coupled to an upper surface of the first cover.

11. The battery pack according to claim 10 , wherein the second cover includes a second vent hole that exposes the separation line.

12. The battery pack according to claim 11 , wherein the first vent hole and the second vent hole are configured to communicate with each other when a thermal event occurs in the battery module.

13. A motor vehicle comprising a battery pack according to any one of claims 1 to 12.

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