Battery assembly, and battery module, battery pack and vehicle comprising same

Abstract

The utility model discloses a battery assembly and a battery module, a battery pack and a vehicle including the same. The battery assembly includes: a base plate; a resin layer disposed on an upper surface of the base plate; a battery cell located above the resin layer; and an insulating sheet located between the battery cell and the resin layer and having a scribe line.

Description

TECHNICAL FIELD

[0001] This application is based on and claims priority to Korean Patent Application No. 10-2024-0001775, filed on January 4, 2024, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.

[0002] The disclosure relates to a battery assembly. BACKGROUND

[0003] As the demand for portable electronic products such as notebook computers, camcorders, and portable phones is rapidly increasing, robots, electric vehicles, and the like are being actively commercialized, and research into high-performance secondary batteries capable of repeated charge and discharge is being actively conducted.

[0004] Currently, commercially available secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, lithium secondary batteries, and the like, among which lithium secondary batteries have the advantages of having almost no or no memory effect, being able to be charged at a convenient time, having a very low self-discharge rate, and having a high energy density, and thus, they are more attractive than nickel-based secondary batteries.

[0005] A lithium secondary battery mainly includes a lithium-based oxide and a carbon material for a positive active material and a negative active material, respectively. The lithium secondary battery includes an electrode assembly including a positive electrode plate and a negative electrode plate coated with a positive active material and a negative active material, respectively, with a separator interposed between the positive electrode plate and the negative electrode plate, and a sealed package or a battery case that accommodates the electrode assembly together with an electrolyte solution.

[0006] In general, according to the shape of the battery case, the lithium secondary battery can be classified into a can-type secondary battery including an electrode assembly in a metal can and a pouch-type secondary battery including an electrode assembly in a soft pack of an aluminum laminated sheet.

[0007] Recently, secondary batteries are widely used in medium- and large-sized devices such as electric vehicles and energy storage systems (ESS) for driving and storing energy, and small-sized devices such as portable electronic devices. A plurality of secondary batteries can be electrically connected and stored inside a module case to form a battery module. In addition, a plurality of battery modules can be connected to each other to form a battery pack.

[0008] However, if a plurality of secondary batteries (battery cells) or a plurality of battery modules are gathered in a small space, they can be easily affected by a thermal event. In particular, if an event such as thermal runaway occurs in one battery cell, high-temperature gas, a flame, or heat can be generated. If the gas, flame, heat, or the like is transferred to other battery cells included in the same battery module, an explosion chain reaction situation such as heat propagation can occur. Furthermore, such a chain reaction not only causes an accident such as a fire or explosion to occur in the corresponding battery module, but also causes a fire or explosion to occur in other battery modules.

[0009] Furthermore, in the case of a medium to large battery pack of, for example, an electric vehicle, a large number of battery cells and battery modules are included to increase output and / or capacity, and thus the risk of thermal chain reaction can further increase. Furthermore, in the case where the battery pack is installed in an electric vehicle or the like, a user such as a driver can be present in the vicinity.

[0010] In particular, due to an expansion phenomenon of the battery cell swelling, the battery cell is easily physically damaged, and the risk of a thermal event occurring due to damage to the battery cell can increase. Therefore, even if the expansion phenomenon occurs in the battery cell, it is necessary to suppress damage to the battery cell and reduce the risk of a thermal event occurring. SUMMARY

[0011] TECHNICAL PROBLEM

[0012] The present disclosure is designed to solve these problems and other problems.

[0013] The present disclosure aims to provide a battery assembly having improved electrical safety.

[0014] The present disclosure also aims to provide a battery assembly capable of preventing damage to a battery cell even when swelling occurs.

[0015] TECHNICAL SOLUTION

[0016] In one aspect of the present disclosure, a battery assembly includes a base substrate, a resin layer disposed on an upper surface of the base substrate, a battery cell located above the resin layer, and an insulating sheet located between the battery cell and the resin layer and having a score line.

[0017] In addition, the battery cell can be combined with the insulating sheet.

[0018] In addition, the bonding force of the battery cell and the insulating sheet can be greater than the bonding force of the resin layer and the insulating sheet.

[0019] In addition, the score line can be located outside of an area where the battery cell and the insulating sheet are in contact.

[0020] In addition, the battery cell can be extended, and the score line can extend along an extension direction of the battery cell.

[0021] In addition, the score line can include a first section, and a second section having higher separability than the first section.

[0022] In addition, the score line can further include a third section having lower separability than the second section, and the second section can be located between the first section and the third section.

[0023] In addition, the battery cell can be provided as a plurality of battery cells, and the plurality of battery cells can be stacked in one direction, and the score line can extend between two portions where adjacent two battery cells among the plurality of battery cells contact the insulation sheet.

[0024] In addition, the score line can include a first score line extending in one direction, and a second score line opposite to the first score line, and the first score line can be configured to have higher separability than the second score line.

[0025] In addition, the second score line can be closer to a central portion of the insulation sheet than the first score line.

[0026] A battery module according to one aspect of the present disclosure includes the battery assembly of the present disclosure.

[0027] A battery pack according to one aspect of the present disclosure includes the battery assembly of the present disclosure.

[0028] A vehicle according to another aspect of the present disclosure can include the battery assembly of the present disclosure.

[0029] Advantageous Effects

[0030] According to at least one of embodiments of the present disclosure, the battery cell can be separated from the insulation sheet or moved together with the insulation sheet.

[0031] According to at least one of embodiments of the present disclosure, the electrical safety of the battery assembly can be improved.

[0032] According to at least one of embodiments of the present disclosure, damage to the battery cell can be prevented.

[0033] According to at least one of embodiments of the present disclosure, the service life of the battery assembly can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, provide further understanding of the technical features of the present disclosure, and therefore, the present disclosure is not construed as being limited to the accompanying drawings.

[0035] Figure 1 FIG. 1 is a perspective view of a battery assembly according to an embodiment of the present disclosure.

[0036] Figure 2 FIG. 2 is a cross-sectional view of the battery assembly of FIG. 1. Figure 1

[0037] Figure 3 FIG. 4 is a view of an insulation sheet of the battery assembly of FIG. 1. Figure 1

[0038] Figure 4 FIG. 6 is a view of a battery cell of the battery assembly of FIG. 1. Figure 1

[0039] Figure 5 FIG. 8 is a separated view of the insulation sheet of the battery assembly of FIG. 1. Figure 1

[0040] Figure 6 FIG. 10 is a view of a modified embodiment of the battery assembly of FIG. 1. Figure 3

[0041] Figure 7 FIG. 12 is a view of another modified embodiment of the battery assembly of FIG. 1. Figure 3

[0042] Figure 8 FIG. 14 is a view of yet another modified embodiment of the battery assembly of FIG. 1. Figure 3

[0043] Figure 9 FIG. 16 is a view of a battery module according to an embodiment of the present disclosure.

[0044] Figure 10 FIG. 18 is a view of a battery module according to another embodiment of the present disclosure.

[0045] Figure 11 FIG. 20 is a view of a battery pack according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the term used in the specification and the appended claims should not be interpreted as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present disclosure on the basis of the principle that the inventor is allowed to define appropriate terms in order to best explain the application.

[0047] Therefore, the description set forth herein is merely illustrative of preferred examples of the disclosure and is not intended to limit the scope of the disclosure as there are many equivalent alternatives which fall within the scope of the present disclosure. Accordingly, the disclosure is not limited to the examples described herein, but the true scope of the present disclosure is disclosed only by the claims below.

[0048] ​​​​​​​Figure 1 is a view of a battery assembly according to an embodiment of the disclosure, showing some components exploded. Figure 2 is a cross-sectional view of the battery assembly of Figure 1 . Figure 3 is a view of an insulation sheet 400 of the battery assembly of Figure 1 .

[0049] Referring to Figures 1 to 3 , the battery assembly can include a base plate 100, a resin layer 300, a battery cell 200, and an insulation sheet 400.

[0050] The base plate 100 can have a flat plate shape. The base plate 100 can form an appearance of the battery assembly. In addition, the base plate 100 can function as a heat sink. In addition, the base plate 100 can additionally have a passage through which a cooling fluid can flow. In addition, the base plate 100 can additionally have a heat dissipation fin for heat dissipation.

[0051] The resin layer 300 can be disposed, located, or formed on an upper surface of the base plate 100. The resin layer 300 can include a material having adhesiveness. In addition, the resin layer 300 can be adhered, bonded, or fixed to the upper surface of the base plate 100. The resin layer 300 can include a material having high thermal conductivity. In addition, the resin can include a material having thermal curing properties.

[0052] The battery cell 200 can be located above the resin layer 300. At this time, the battery cell 200 can denote a secondary battery. In addition, the battery cell 200 can be a secondary battery having a soft pack shape. The battery cell 200 can be provided in a plurality. The plurality of battery cells 200 can be stacked along a left-right direction or a Y-axis direction.

[0053] The pad 500 can be located between the plurality of battery cells 200. The pad 500 can be provided in a plurality. The pad 500 can include an elastic material. For example, the pad 500 can include a silicone material or a polyurethane material. The pad 500 can be compressed when the battery cell 200 is expanded.

[0054] The insulation sheet 400 can be located between the battery cell 200 and the resin layer 300. The insulation sheet 400 can include an electrically insulating material. For example, the insulation sheet 400 can include a polycarbonate material. In addition, the insulation sheet 400 can be made of a thin plate. For example, the insulation sheet 400 can have a thickness of 100 μm to 250 μm.

[0055] The insulation sheet 400 can be attached, bonded, or fixed to an upper surface of the resin layer 300. In addition, the insulation sheet 400 can be attached, bonded, or fixed to a lower surface of the battery cell 200. An adhesive layer or an adhesive member can be additionally provided between the insulation sheet 400 and the battery cell 200.

[0056] The insulation sheet 400 can have a score line 410. The score line 410 can be used as a term including and collectively referred to as a perforation line 410, a scribe line 410, a cutting line 410, a pulverization line 410, a tear line 410, or a score line 410.

[0057] The score line 410 can enable the insulation sheet 400 to be easily separated by a shearing stress applied to the insulation sheet 400.

[0058] According to such a configuration according to the disclosure, the stability and safety of the battery assembly can be improved. The battery cell 200 can be separated together with the insulation sheet 400. When swelling occurs in a part of the battery cells 200 among the stacked plurality of battery cells 200, the adjacent battery cells 200 can be stressed in the stacking direction. As a result, a part of the battery cells 200 can be separated together with a part of the insulation sheet 400. For example, when the battery cell 200 does not separate because it is combined with the insulation sheet 400 or the resin layer 300, the lower surface of the battery cell 200 can be torn or damaged by the force received in the stacking direction. However, according to such a configuration according to the disclosure, since the battery cell 200 is allowed to be separated, moved, or detached together with the insulation sheet 400, the battery cell 200 can be prevented from being damaged. Therefore, the lifespan of the battery assembly can be improved, and the cooling performance can be maintained.

[0059] Referring to Figures 1 to 3 , the bonding force of the battery cell 200 of the battery assembly according to the embodiment of the disclosure to the insulation sheet 400 can be greater than the bonding force of the resin layer 300 to the insulation sheet 400. Alternatively, the bonding of the resin layer 300 to the insulation sheet 400 can be more easily separated than the bonding of the battery cell 200 to the insulation sheet 400. Therefore, when the battery cell 200 is subjected to a shearing stress due to swelling, the battery cell 200 and the insulation sheet 400 can not be separated, but the insulation sheet 400 can move on the resin layer 300. At this time, the insulation sheet 400 can be at least partially separated along the score line 410.

[0060] According to such a configuration according to the disclosure, since the battery cell 200 is configured to be movable, damage to the battery cell 200 can be minimized. As a result, the lifespan, safety, and stability of the battery assembly can be improved.

[0061] Referring to Figures 1 to 3 , the battery cell 200 of the battery assembly according to the embodiment of the disclosure can be elongated. The battery cell 200 can be elongated in the length direction or the X-axis direction. In addition, the score line 410 can be elongated along the battery cell 200. Alternatively, the score line 410 can be elongated in the front-rear direction, the length direction of the battery cell 200, or the X-axis direction.

[0062] According to such a configuration according to the disclosure, the scribe line 410 can facilitate the movement or separation of the battery cell 200.

[0063] Referring to Figures 1 to 3 , the battery assembly according to an embodiment of the disclosure can have a plurality of scribe lines 410. The scribe line 410 can include a first scribe line 411 and a second scribe line 412. The first scribe line 411 can extend in one direction. The first scribe line 411 can extend in a front-rear direction or an X-axis direction. The second scribe line 412 can be opposite to the first scribe line 411. The second scribe line 412 can extend in the front-rear direction, the X-axis direction, or a length direction of the first scribe line 411.

[0064] The first scribe line 411 can be configured to have a higher separability than the second scribe line 412. The separability can indicate a degree to which the insulation sheet 400 is easily separated. The high separability can indicate that the insulation sheet 400 can be easily separated.

[0065] According to such a configuration according to the disclosure, since the battery cell 200 is configured to be movable, damage to the battery cell 200 can be minimized. When swelling occurs in a plurality of stacked battery cells 200, a shear stress can be applied to the battery cell 200. In addition, a displacement due to swelling can be accumulated in a stacking direction. Thereby, among the plurality of stacked battery cells 200, the battery cell 200 located at the outer side needs to be more easily separated and can have to move more than the battery cell 200 located at the inner side. Therefore, by configuring each scribe line 410 to have different separability, damage that occurs depending on the position of the battery cell 200 can be prevented.

[0066] Referring to Figures 1 to 3 , the second scribe line 412 of the battery assembly according to an embodiment of the disclosure can be disposed closer to the central portion of the insulation sheet 400 than the first scribe line 411. Alternatively, the second scribe line 412 can be disposed more inward than the first scribe line 411. Alternatively, the first scribe line 411 can be disposed more outward than the second scribe line 412.

[0067] The first scribe line 411 can be disposed in a pair. In addition, the second scribe line 412 can be disposed in a pair. The pair of second scribe lines 412 can be located between the pair of first scribe lines 411.

[0068] According to such a configuration according to the disclosure, since the first scribe line 411 having high separability is located at the outer side of the second scribe line 412, the first scribe line 411 can be easily separated or moved depending on the position of the battery cell 200. Therefore, damage to the battery cell 200 can be prevented regardless of the position of the battery cell 200.

[0069] Figure 4 is to illustrate Figure 1a diagram of a battery cell 200 of a battery assembly according to an embodiment of the disclosure. Figure 5 is a diagram illustrating Figure 1 a separate view of an insulation sheet 400 of a battery assembly according to an embodiment of the disclosure. Referring to Figure 4 and Figure 5 , swelling can occur in a battery cell 200 of a battery assembly according to an embodiment of the disclosure. The battery cell 200 that swells can expand along a left-right direction or a Y-axis direction. Accordingly, the battery cell 200 can move or separate together with the insulation sheet 400. At this time, the battery cell 200 that moves or separates can be a battery cell 200 located at an outermost end among a plurality of stacked battery cells 200.

[0070] Figure 6 is a diagram illustrating Figure 3 a modified embodiment of a battery assembly according to an embodiment of the disclosure. Referring to Figures 4 to 6 , scribe lines 411 and 412 of a battery assembly according to an embodiment of the disclosure can be located outside a region where a battery cell 200 contacts, bonds, attaches, or is fixed to an insulation sheet 400. A lower surface of the battery cell 200 can contact, bond, attach, or be fixed to an upper surface of the insulation sheet 400. At this time, a portion of the insulation sheet 400 that contacts, bonds, attaches, or is fixed to the battery cell 200 can be denoted as A1, A2, A3, and A4. In addition, the scribe lines 411 and 412 can be located outside the portions A1, A2, A3, and A4. Alternatively, the scribe lines 411 and 412 can not meet or intersect the portions A1, A2, A3, and A4.

[0071] If the scribe lines 411 and 412 overlap the portions A1, A2, A3, and A4, damage to the battery cell 200 can occur when the insulation sheet 400 is separated.

[0072] However, according to such a configuration of the disclosure, the insulation sheet 400 can be separated at a boundary of adjacent battery cells 200. Accordingly, damage to the battery cell 200 can be prevented.

[0073] Referring to Figures 4 to 6 , scribe lines 411 and 412 of a battery assembly according to an embodiment of the disclosure can extend between two portions where two adjacent battery cells 200 contact the insulation sheet 400.

[0074] The first scribe line 411 can be located between the portion A1 and the portion A2. The first scribe line 411 can extend along at least one of a length direction of the portion A1, a length direction of the portion A2, between the portion A1 and the portion A2, a front-rear direction, or an X-axis direction. At this time, the battery cell 200 that contacts, bonds, attaches, or is fixed to the portion A1 can be a battery cell 200 located at an outermost side among a plurality of stacked battery cells 200.

[0075] The second score line 412 can be located between the portion A3 and the portion A4. The second score line 412 can extend in at least one of the length direction of the portion A3, the length direction of the portion A4, between the portion A3 and the portion A4, the front-rear direction, or the X-axis direction. At this time, the battery cell 200 which is in contact with, bonded to, attached to, or fixed to the portion A3 or the portion A4 can be the battery cell 200 located in the central portion or close to the central portion among the plurality of stacked battery cells 200.

[0076] According to such a configuration according to the disclosure, the insulating sheet 400 can be separated at the boundary of the adjacent battery cells 200. As a result, damage to the battery cells 200 can be prevented. In addition, since the first score line 411 having high separability is located outside the second score line 412, separation or movement according to the position of the battery cell 200 can be facilitated.

[0077] Figure 7 is a view illustrating another modified embodiment of Figure 3 . Referring to Figure 7 , the score lines 411 and 412 of the battery assembly according to an embodiment of the disclosure can include a first section P1 and a second section P2. The second section P2 can have higher separability than the first section P1. The first section P1 and the second section P2 can be continuously connected. In addition, the second section P2 can be located in or close to the central portion of the score lines 411 and 412.

[0078] According to such a configuration according to the disclosure, damage to the battery cells 200 can be prevented. When swelling occurs in the battery cells 200, the central portion of the battery cells 200 can mainly expand. Therefore, in the score lines 411 and 412, the separability of the portion corresponding to the central portion of the battery cells 200 is higher than that of the other portions, so that the battery cells 200 can be easily separated or moved.

[0079] Referring to Figure 7 , the score line 410 of the battery assembly according to an embodiment of the disclosure can further include a third section P3. The third section P3 can have lower separability than the second section P2. In addition, the second section P2 can be located between the first section P1 and the third section P3. The first section P1, the second section P2, and the third section P3 can be continuously connected. In addition, the separability of the first section P1 and the separability of the third section P3 can be substantially the same.

[0080] The first section P1 and the third section P3 can be symmetrically disposed and configured with respect to the second section P2. In addition, the second section P2 can be located in or close to the central portion of the score lines 411 and 412.

[0081] According to such a configuration according to the disclosure, the battery cells 200 can be easily separated or moved.

[0082] Figure 8 is a view illustrating Figure 3 another variant embodiment of the battery module according to an embodiment of the disclosure. Referring to Figure 8 , the scribe line 410 of the battery module according to an embodiment of the disclosure can include a first scribe line 411, a second scribe line 412, and a third scribe line 413. The first scribe line 411 can be located at the outermost side. Also, the second scribe line 412 can be disposed more inward than the first scribe line 411. Also, the third scribe line 413 can be disposed more inward than the second scribe line 412. The first scribe line 411 to the third scribe line 413 can include a fourth section P4 and a fifth section P5. The fifth section P5 can have lower separability than the fourth section P4. Also, the fourth section P4 can be located between a pair of fifth sections P5. The fourth section P4 and the pair of fifth sections P5 can be continuously connected. Also, the pair of fifth sections P5 can have substantially the same separability. The pair of fifth sections P5 can be symmetrically disposed and configured with respect to the fourth section P4. Also, the fourth section P4 can be located at or near the central portion of the scribe lines 411, 412, and 413.

[0083] The fourth section P4 of the second scribe line 412 can be formed longer than the fourth section P4 of the third scribe line 413. Also, the fourth section P4 of the first scribe line 411 can be formed longer than the fourth section P4 of the second scribe line 412.

[0084] According to such a configuration according to the disclosure, the battery cells 200 located at the outer side can be more easily separated or moved than the battery cells 200 located at the inner side. As a result, the plurality of battery cells 200 can be separated or moved in stages or sequentially, and damage to the battery cells 200 can be minimized.

[0085] Figure 9 is a view illustrating a battery module according to an embodiment of the disclosure. Referring to Figure 9 , the base plate 100 according to the disclosure can be configured as the base plate 100 of the battery module. The side plates 110 can be disposed at both sides of the base plate 100. The pair of side plates 110 and the base plate 100 can be integrally formed. Also, the pair of side plates 110 and the base plate 100 can constitute a frame. Also, the top plate 120 can be coupled to the pair of side plates 110. Also, the end covers 130 can be respectively coupled to the front side and the rear side of the frame.

[0086] Figure 10 is a view illustrating a battery module according to another embodiment of the disclosure. Referring to Figure 10The base plate 100 of the present disclosure can be configured as a base plate 100 of a battery module. The side plates 110 can be provided at both sides of the base plate 100. In addition, the top plate 120 can be coupled to the pair of side plates 110. The pair of side plates 110, the base plate 100, and the top plate 120 can be integrally formed. In addition, the pair of side plates 110, the base plate 100, and the top plate 120 can form a frame. In addition, the end covers 130 can be coupled to the front side and the rear side of the frame, respectively.

[0087] Figure 11 FIG. 1 is a view illustrating a battery module according to an embodiment of the present disclosure. Referring to FIG. 1, the battery module can include a base plate 100, a plurality of battery cells 200, a plurality of side plates 110, a top plate 120, and end covers 130. Figure 11 The base plate 100 of the present disclosure can be configured as a base plate 100 of a battery module. The side plates 110 can be provided at both sides of the base plate 100. In addition, the top plate 120 can be coupled to the pair of side plates 110. The pair of side plates 110, the base plate 100, and the top plate 120 can be integrally formed. In addition, the pair of side plates 110, the base plate 100, and the top plate 120 can form a frame. In addition, the end covers 130 can be coupled to the front side and the rear side of the frame, respectively.

[0088] A partition wall 140 can be mounted on the upper surface of the base plate 100. In addition, the partition wall 140 can be coupled or fastened to the side plates 110. The partition wall 140 can divide the plurality of battery cells 200 into a plurality of groups.

[0089] The battery assembly of the present disclosure can mean a battery module or a battery pack. When the battery assembly means a battery module, the battery assembly can further include various components, for example, components of the battery module known at the time of filing the present application, for example, a module case, a cooling unit, etc.

[0090] In addition, when the battery assembly means a battery pack, the battery assembly according to the present disclosure can further include various components, for example, components of the battery pack known at the time of filing the present application, for example, a BMS, a busbar, a relay, a current sensor, etc.

[0091] The vehicle according to the present disclosure can include the above-described battery assembly according to the present disclosure. The battery assembly according to the present disclosure can be applied to a vehicle, for example, an electric vehicle or a hybrid vehicle. In addition, the vehicle according to the present disclosure can further include various other components included in the vehicle, for example, a body, a motor, a control device similar to an ECU (Electronic Control Unit), in addition to the battery assembly.

[0092] For the convenience of description, terms indicating directions such as up, down, left, right, front, and rear are used, but it is obvious to those skilled in the art that the terms can change depending on the position of the element or the observer.

[0093] The present disclosure has been described in detail. However, it will be understood that the detailed description and specific examples, while indicating the preferred embodiments of the present disclosure, are given by way of illustration only, since various changes and modifications within the scope of the present disclosure will become apparent to those skilled in the art from this detailed description.

[0094] [Reference Signs]

[0095] 100: base plate

[0096] 110: side plate

[0097] 120: top plate

[0098] 130: end cap

[0099] 140: partition wall

[0100] 200: battery cell

[0101] 300: resin layer

[0102] 400: insulating sheet

[0103] 410: score line

[0104] 411: first score line

[0105] 412: second score line

[0106] 500: pad

Claims

1. A battery assembly, comprising: including: a base plate; a resin layer provided on an upper surface of the base plate; a battery cell located above the resin layer; and an insulating sheet located between the battery cell and the resin layer and having a plurality of score lines. The battery cell is bonded to the insulating sheet.

2. The battery assembly of claim 1, wherein, The bonding force of the battery cell to the insulating sheet is greater than the bonding force of the resin layer to the insulating sheet.

3. The battery assembly of claim 2, wherein, The score lines are located outside of regions where the battery cell and the insulating sheet are in contact.

4. The battery assembly of claim 2, wherein, 5. The battery assembly according to claim 1, wherein the battery cell extends, and the score lines extend in the direction of the extension of the battery cell.

6. The battery assembly according to claim 1, wherein the score lines include: a first section; and a second section having higher separability than the first section.

7. The battery assembly according to claim 6, wherein the score lines further include a third section having lower separability than the second section, and the second section is located between the first section and the third section.

8. The battery assembly according to claim 1, wherein the battery cell is provided as a plurality of battery cells stacked along one direction, and the plurality of score lines respectively extend between two portions where adjacent two battery cells among the plurality of battery cells and the insulating sheet are in contact.

9. The battery assembly according to claim 1, wherein the score lines include: a first score line extending in one direction; and a second score line opposite to the first score line, wherein the first score line is configured to have higher separability than the second score line. The second score line is provided closer to a central portion of the insulating sheet than the first score line.

10. The battery assembly of claim 9, wherein, 11. A battery module including the battery assembly according to any one of claims 1 to 10.

12. A battery pack including the battery assembly according to any one of claims 1 to 10.

13. A vehicle including the battery assembly according to any one of claims 1 to 10. ​

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