Battery pack and vehicle

Abstract

The embodiment of the utility model provides a battery pack and a vehicle, and the battery pack comprises a box body which comprises an upper cover and a bottom plate, and the upper cover and the bottom plate are enclosed to form a containing cavity; the longitudinal beam is connected between the upper cover and the bottom plate, one end, close to the upper cover, of the longitudinal beam is provided with a connecting part, and the connecting part is used for connecting the upper cover and the longitudinal beam; the battery modules are arranged in the containing cavity, and the battery modules are arranged on the two sides of the longitudinal beam; the battery module and the longitudinal beam are covered with the insulating film, an avoiding hole is formed in the position, corresponding to the connecting part, of the insulating film, and the connecting part is exposed from the avoiding hole. A longitudinal beam surface coating in the prior art is replaced by the widened insulating film which is locally punched, the shape design of the insulating film is improved, the insulating spraying process of the box longitudinal beam is reduced, the assembling technology is improved, the assembling mode of the insulating film belt is simple, the production efficiency can be improved, the overall structure is compact, and insulating protection of a battery cell can be effectively achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and a vehicle. BACKGROUND

[0002] New energy vehicles have been applied more and more widely in recent years, and the main energy storage device adopted by the new energy vehicles is a lithium ion battery. The lithium ion battery is composed of a battery module and a box body. In order to improve the strength of the box body, longitudinal beams connecting the top and the bottom of the box body are arranged in the box body, and the battery module is arranged on both sides of the longitudinal beams. Since the box body and the longitudinal beams are mostly made of metal materials, the longitudinal beams need to be insulated from the battery module.

[0003] The existing insulation method is to cover a layer of insulating coating on the surface of the longitudinal beam. This scheme has a high cost, and needs to insulate and spray multiple parts; moreover, the process is complex, and multiple hiding avoidance needs to be performed on complex parts to avoid affecting subsequent processes or assembly. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a battery pack and a vehicle to solve the problem of insulating and spraying multiple parts in the related art.

[0005] To solve the above technical problems, the present application is implemented as follows:

[0006] In a first aspect, the utility model discloses a battery pack, comprising:

[0007] The box body comprises an upper cover and a bottom plate, and the upper cover and the bottom plate enclose a containing cavity;

[0008] The longitudinal beam is connected between the upper cover and the bottom plate, and one end of the longitudinal beam close to the upper cover has a connecting portion;

[0009] The battery module is arranged in the containing cavity;

[0010] The insulating film is covered on the battery module and the longitudinal beam, the insulating film is provided with a avoiding hole at a position corresponding to the connecting portion, and the connecting portion is arranged in the avoiding hole and connected with the upper cover.

[0011] Optionally, the distance between the hole wall of the avoiding hole and the battery module meets the requirement of the creepage distance.

[0012] Optionally, the distance between the longitudinal beam and the battery module meets the requirement of the electrical clearance.

[0013] Optionally, the insulating film wraps a part of the connecting portion, and one side of the connecting portion facing the upper cover is exposed.

[0014] Optionally, the battery module has a first direction and a second direction intersecting with each other, and the battery module comprises:

[0015] The electric cell group comprises a plurality of electric cells arranged in the first direction and the second direction.

[0016] The integrated busbar comprises a gasket, a wire harness and a wire harness isolation plate, the wire harness isolation plate is provided with a mounting groove and a wire harness channel, the gasket is arranged in the mounting groove, the gasket is connected with the electric cell, and the wire harness is arranged in the wire harness channel and connected with the gasket.

[0017] Optionally, the insulation film is in a strip shape, extends along the first direction, and covers the surface of the gaskets in the same column arranged along the first direction.

[0018] Optionally, the upper cover is provided with a mounting hole, and a fastener passes through the mounting hole and the connecting portion to connect the upper cover and the longitudinal beam.

[0019] Optionally, a cold plate is further arranged between the battery module and the longitudinal beam, and an insulating coating is sprayed on the surface of the cold plate.

[0020] Optionally, the insulation film comprises one of a ceramic composite insulation film, a solid silicone rubber insulation film, a polyimide insulation film, a polyethylene terephthalate insulation film and a mica insulation film.

[0021] In a second aspect, the utility model embodiment further provides a vehicle comprising any one of the battery packs provided in the first aspect.

[0022] The utility model embodiment provides a battery pack and a vehicle, which comprise: a box body comprising an upper cover and a bottom plate, the upper cover and the bottom plate being enclosed to form a containing cavity; a longitudinal beam connected between the upper cover and the bottom plate, one end of the longitudinal beam close to the upper cover being provided with a connecting portion for connecting the upper cover and the longitudinal beam; a battery module arranged in the containing cavity, the battery module being arranged on both sides of the longitudinal beam; and an insulation film covering the battery module and the longitudinal beam, the insulation film being provided with a clearance hole at a position corresponding to the connecting portion, and the connecting portion being exposed from the clearance hole. The local perforated widened insulation film is used to replace the surface coating of the longitudinal beam in the prior art, the shape design of the insulation film is improved, the insulation spraying process of the longitudinal beam of the box body is reduced, the assembly process is improved, the insulation film belt assembly mode is simple, the production efficiency can be improved, the overall structure is compact, and the insulation protection of the electric cell can be effectively realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 An exploded view of the battery pack provided by the embodiment of the application is shown;

[0024] Figure 2 A top view of the battery pack provided by the embodiment of the application is shown.

[0025] Figure 3 Figure 1 shows a partial cross-sectional view of a battery pack according to an embodiment of the present application.

[0026] Reference signs:

[0027] 100: battery pack; 1: box; 11: upper cover; 111: mounting hole; 12: bottom plate; 13: longitudinal beam; 131: connecting portion; 2: battery module; 21: group of battery cells; 211: single battery cell; 2111: explosion-proof valve; 22: CCS; 3: insulation film; 31: avoiding hole; 4: cold plate; 5: heat-conducting structural adhesive. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0030] The embodiment of the utility model provides a kind of battery pack 100, comprising: box 1, including upper cover 11 and bottom plate 12, upper cover 11 and bottom plate 12 are enclosed to form a containing cavity;Longitudinal beam 13 is connected between upper cover 11 and bottom plate 12, and the end of longitudinal beam 13 close to upper cover 11 has connecting portion 131, for connecting upper cover 11 and longitudinal beam 13;Battery module 2 is located in containing cavity, and battery module 2 is located on both sides of longitudinal beam 13;Insulation film 3 is covered on battery module 2 and longitudinal beam 13, and insulation film 3 is provided with avoiding hole 31 at the position corresponding to connecting portion 131, and connecting portion 131 is exposed from avoiding hole 31.

[0031] As Figure 1As shown, the box 1 of the battery pack 100 is composed of an upper cover 11 and a bottom plate 12, which enclose a receiving cavity for accommodating the battery module 2. The box 1 of the battery pack 100 is generally made of metal materials such as steel plate and aluminum plate. The metal box 1 has simple manufacturing process, low cost, good heat conductivity, impact resistance and heat management capability. In order to reduce the weight of the battery pack 100, some products also use a box 1 combination mode of composite upper cover 11 combined with metal bottom plate 12. In order to improve the strength of the box 1, a longitudinal beam 13 is arranged between the upper cover 11 and the bottom plate 12, and the top of the longitudinal beam 13 has a protruding connecting part 131 for assembling with the upper cover 11.

[0032] The battery module 2 includes a cell group 21 and a CCS 22 (integrated busbar), a plurality of cells are arranged in an array in the receiving cavity to form the cell group 21, and the cell group 21 is connected with the CCS 22 at the top to realize series and parallel connection among the plurality of cells. The CCS 22 is mainly composed of a signal acquisition assembly, a plastic structural part, a bar sheet and the like, and is connected into a whole through processes such as hot pressing or riveting, and is applied in a new energy automobile and an energy storage battery module 2 to realize high-voltage series and parallel connection of cells, temperature sampling and cell voltage sampling functions of the battery, and transmit temperature and voltage information and the like to a BMS system through an information sampling assembly and a connector, and belongs to a part of the BMS system.

[0033] The CCS 22 in the embodiment includes a bar sheet, a wire harness and a wire harness isolation plate. The bar sheet is generally made of copper sheet or aluminum sheet and is welded with the top of the cell. A plurality of bar sheets are connected through a wire harness. Since the cells in the cell group 21 are arranged in an array, the bar sheets connected with the cells are also arranged in an array to form a metal row. The wire harness connected with the bar sheets is gathered between two adjacent metal rows. The bar sheet and the wire harness are arranged on the wire harness isolation plate for protection and isolation of the wire harness in the battery module 2, which can effectively prevent damage and accidents of the battery module 2 caused by short circuit or failure of the wire harness.

[0034] Due to the presence of a large number of charged elements and metal structures in the battery pack 100, the surface of the charged components needs to be insulated to prevent leakage and short circuit accidents. The wire harness isolation plate in the CCS 22 can play a certain insulating protection role, but the baffle is exposed on the surface of the wire harness isolation plate, so an insulating film 3 is provided on the CCS 22 to cover the exposed baffle and prevent the baffle from leaking. Because the wire harness is provided between the two adjacent rows of baffles, and needs to avoid the longitudinal beam 13 connecting the upper cover 11 and the bottom plate 12, the insulating film 3 is generally in the form of a strip, leaving space for the wire harness and the longitudinal beam 13. When the upper cover 11 is made of non-metallic materials such as carbon fiber composite material, glass fiber reinforced composite material and SMC composite material, no insulation is needed between the upper cover 11 and the battery module 2. The insulating film 3 mainly plays a role in preventing parts from falling and accidental contact with charged elements during installation. When the upper cover 11 is made of metal materials such as copper plate and aluminum plate, the insulating film 3 and the wire harness isolation plate also play an insulating role. The bottom plate 12 is sprayed with an insulating coating to insulate the bottom plate 12 and the battery module 2 placed on the bottom plate 12.

[0035] Since the longitudinal beam 13 is also made of metal material, insulation between the longitudinal beam 13 and the battery module 2 needs to be considered. The battery module 2 side is provided with a cold plate 4 for cooling. Aluminum alloy and copper alloy are commonly used materials for the cold plate 4. The surface of the cold plate 4 is coated with an insulating coating, and there is a certain distance between the battery module 2 and the longitudinal beam 13 to meet the electrical clearance. The cold plate 4 provided between the longitudinal beam 13 and the battery module 2 can not only cool the battery module 2, but also play a role in electrically isolating the battery module 2 and the longitudinal beam 13. It can meet the insulation requirements between the cell group 21 and the longitudinal beam 13 in the normal working state. The CCS 22 on the cell group 21 is insulated by the wire harness isolation plate and the insulating film 3. The insulating film 3 isolates the baffle from the top upper cover 11, and the wire harness isolation plate isolates the side of the baffle, which can meet the insulation requirements between the CCS 22 and the longitudinal beam 13 in the normal working state.

[0036] Therefore, in the normal working state, no additional insulation treatment is needed between the longitudinal beam 13 and the battery module 2. The existing cold plate 4, insulating film 3 and wire harness isolation plate can be used to protect the battery module 2, and no conduction short circuit will occur.

[0037] However, this design has obvious defects in thermal runaway. Once the battery module 2 experiences thermal runaway, a large amount of high-temperature gas will be sprayed out of the explosion-proof valve 2111 at the top of the cell. Although the wire harness isolation plate is provided at the top of the explosion-proof valve 2111, the wire harness isolation plate is generally made of PC or PET material, which has a low melting point and cannot effectively block the sprayed material. The high-temperature gas sprayed out breaks through the wire harness isolation plate and is transmitted to the free area of the upper cover 11, causing pollution at the top of the longitudinal beam 13 and easily leading to further loss of control of the cell arc. Therefore, it is also necessary to take certain protective measures at the top of the longitudinal beam 13 to improve the electrical safety in the thermal runaway state.

[0038] In existing mature technologies, the protection method adopted for the longitudinal beam 13 is to cover the surface of the longitudinal beam 13 with an insulating coating. This method is not only costly and requires insulating spraying of multiple components, but also involves complex processes. For complex components, multiple areas need to be covered and avoided to prevent subsequent processes or assembly from being affected.

[0039] In this embodiment of the invention, two adjacent insulating films 3 on both sides of the longitudinal beam 13 are merged into a wider insulating film 3, which spans across the two battery cell groups 21. The insulating film 3 covers the top of the longitudinal beam 13 to achieve insulation protection for the longitudinal beam 13. A clearance hole 31 is provided on the insulating film 3 at a position corresponding to the connecting part 131. A clearance opening is made at the fixing point of the upper cover 11 of the longitudinal beam 13, allowing the connecting part 131 to be exposed through the clearance hole 31 and connected to the upper cover 11.

[0040] like Figure 3 As shown, the strip-shaped insulating film 3 covers the surface of the metal busbar of CCS22 and extends to the top of the longitudinal beam 13, covering the top of the longitudinal beam 13. Furthermore, the insulating film 3 has good heat resistance, capable of withstanding temperatures above 1000℃, preventing penetration by the ejected high-temperature gas.

[0041] Under normal conditions, the CCS22 is welded and fixed to the battery cell through its metal busbar. The upper surface of the metal busbar is 100% covered by an insulating film 31, protecting the electrical safety of the module and external components. The side of the battery cell is equipped with a side cooling plate 4 (or side plate), and its surface (or body) has an insulating layer to ensure the electrical safety of the battery cell and the longitudinal beam 13. When thermal runaway occurs, high-temperature gas is ejected through the battery cell explosion-proof valve 2111, breaking through the CCS22 wire harness isolation plate (plastic part, usually PC or PET, with a low melting point) and being transferred to the free area of ​​the top cover 11. Since the insulating film 3 is attached to the surface of the metal busbar and can withstand temperatures above 1000℃, it can also prevent the battery cell from arcing and further runaway, effectively protecting electrical safety.

[0042] In this embodiment of the utility model, a widened insulating film 3 with partial perforation is used to replace the surface coating of the longitudinal beam 13 in the prior art. By improving the shape design of the insulating film 3, the insulation spraying process of the longitudinal beam 13 of the housing 1 is reduced, the assembly process is improved, the insulating film 3 has a simple assembly method, which can improve production efficiency, and the overall structure is compact, which can effectively achieve insulation protection of the battery cell.

[0043] In addition, in some optional embodiments, the distance between the wall of the clearance hole 31 and the battery module 2 meets the creepage distance requirement, and the distance between the longitudinal beam 13 and the battery module 2 meets the electrical clearance requirement.

[0044] The electrical clearance refers to the shortest spatial distance measured between two conductive parts or between a conductive part and a protective interface of an equipment. That is, the shortest distance through which insulation can be achieved by air while ensuring stable and safe electrical performance. The creepage distance refers to the shortest path measured along the surface of insulation between two conductive parts or between a conductive part and a protective interface of an equipment. In the embodiment, the electrical clearance between the longitudinal beam 13 and the battery module 2 is the straight-line distance between the side surface of the longitudinal beam 13 and the side surface of the battery module 2, and the creepage distance is the length of the charged metal on the CCS 22 reaching the hole wall of the avoidance hole 31 along the surface of the CCS 22 and the surface of the insulation film 3.

[0045] The size of the electrical clearance and the creepage distance is directly related to the working voltage, the insulation material, and the like, and is also influenced by different use environments. In actual applications, the use environment of the battery should be considered to set appropriate creepage distances and electrical clearances to determine the size of the avoidance hole 31. For example, when the working voltage of the battery is 800 V, the electrical clearance should be greater than 8.3 mm, and the creepage distance should be greater than 14 mm. When the working voltage of the battery changes, the minimum electrical clearance and the creepage distance also change.

[0046] In addition, in some optional embodiments, the insulation film 3 wraps a part of the connecting part 131, and one side of the connecting part 131 facing the upper cover 11 is exposed.

[0047] In the embodiment of the utility model, the insulation film 3 is made of flexible material, and has back glue for bonding at the bottom. When the insulation film 3 is bonded to the surface of the battery module 2 and the longitudinal beam 13, the top of the longitudinal beam 13 and the protruding connecting part 131 can be wrapped to completely isolate the top of the longitudinal beam 13 from the free area of the upper cover 11.

[0048] In addition, in some optional embodiments, the battery pack 100 has a first direction and a second direction intersecting each other, and the battery module 2 includes: a cell group 21 including a plurality of cells arranged in an array along the first direction and the second direction; an integrated busbar including a bar, a wire harness and a wire harness isolation plate, the wire harness isolation plate being provided with a mounting groove and a wire harness channel, the bar being arranged in the mounting groove and connected with the cells, and the wire harness being arranged in the wire harness channel and connected with the bar.

[0049] As shown in FIG. 1, Figure 2 In the embodiment, the cells are square cells arranged in an array in the accommodating cavity enclosed by the upper cover 11 and the bottom plate 12, the positive and negative electrode posts of the cells are located at the top of the cells, the bar in the CCS 22 is arranged at a corresponding position at the top of the cells and is welded with the positive and negative electrode posts of the cells, and the bar is connected with the wire harness to realize the series and parallel connection of the plurality of cells.

[0050] The CCS 22 includes the busbar, the harness and the harness isolation plate, the harness isolation plate is arranged on the top of the battery cell group 21, the mounting groove for mounting the busbar is arranged at the position corresponding to the positive and negative electrode poles of the battery cell, the mounting groove is the slot hole penetrating through the harness isolation plate, the side wall around the slot hole has the groove, the busbar is fixed in the groove, and the harness isolation plate made of the insulating material insulates the adjacent busbars. The bottom of the busbar is exposed and welded with the positive and negative electrode poles of the battery cell. The battery cells are arranged in the accommodating cavity, and therefore the busbars are also arranged in an array at the corresponding positions, and the harness channel for accommodating the harness is arranged between the mounting grooves for accommodating two columns of busbars connected with the same column of battery cells.

[0051] In addition, in some optional embodiments, the insulating film 3 is in a strip shape, the insulating film 3 extends along the first direction, and the insulating film 3 covers the surfaces of the busbars arranged in the same column along the first direction.

[0052] The insulating film 3 plays an insulating protection role on the busbars exposed on the harness isolation plate. Due to the existence of the longitudinal beam 13 and the harness, the insulating film 3 cannot adopt a structure form of covering the entire battery module 2 integrally, and needs to avoid the connecting part 131 of the longitudinal beam 13 and the harness. Therefore, in the embodiments of the utility model, the insulating film 3 is in a strip shape extending along the first direction and is arranged on the battery module 2 in the second direction at intervals. The insulating film 3 above the longitudinal beam 13 is relatively wide and spans two battery cell groups 21, so as to realize the insulating protection on the longitudinal beam 13.

[0053] In addition, in some optional embodiments, the fastener is further included, the upper cover 11 is provided with the mounting hole 111, and the fastener passes through the mounting hole 111 and the connecting part 131, so as to realize the connection of the upper cover 11 and the longitudinal beam 13.

[0054] The mounting hole 111 is arranged at the position corresponding to the assembly position of the upper cover 11 and the longitudinal beam 13, the fastener passes through the mounting hole 111, the connecting part 131 exposed from the avoiding hole 31 and the upper cover 11 are connected and fixed together, the fastener is generally connected with the connecting part 131, the connecting part 131 is a metal block protruding from the top surface of the longitudinal beam 13, an internal thread matched with the bolt is processed in the connecting part 131, or a sleeve connected with the bolt is arranged, after the upper cover 11 is buckled on the bottom plate 12, the bolt is inserted into the connecting part 131 from the mounting hole 111 and is tightened, and the assembly of the battery pack 100 is completed.

[0055] In some embodiments, in addition to the function of connecting the upper cover 11 and the longitudinal beam 13, the connecting part 131 is also used as a mounting point for mounting the battery pack 100 on the frame of the vehicle, so that the connection of the battery pack 100 and the frame is more reliable. It can be understood that when used for different purposes, the connection form, size of the fastener and the connecting part 131 are different, and therefore the position, number and shape of the avoiding hole 31 on the insulating film 3 and the mounting hole 111 on the upper cover 11 are determined according to the actual assembly mode and are not limited here.

[0056] In addition, in some optional embodiments, a cold plate 4 is further included, which is arranged between the battery module 2 and the longitudinal beam 13, and the surface of the cold plate 4 is sprayed with an insulating coating.

[0057] The cold plate 4 is a liquid cold plate 4, which has a liquid channel inside, and cooling liquid flows along the liquid channel to cool the battery module 2 and transfer the generated heat to a liquid cooling system. The outer shell of the cold plate 4 is made of a metal such as copper or aluminum, which has good heat conduction performance. A heat-conducting structural adhesive 5 is filled between the cold plate 4 and the battery module 2. The surface of the cold plate 4 needs to be sprayed with an insulating coating to prevent contact with the adjacent battery module 2 and affect the electrical safety.

[0058] In order to enhance the heat dissipation effect, in addition to cooling the side of the battery module 2, the bottom of the battery module 2 is also provided with a cold plate 4.

[0059] In addition, in some optional embodiments, the insulating film 3 includes one of a ceramic composite insulating film 3, a solid silicone rubber insulating film 3, a polyimide insulating film 3, a polyethylene terephthalate insulating film 3, and a mica insulating film 3.

[0060] The battery pack and the vehicle provided by the embodiments of the present application include a box body, a longitudinal beam, and a battery module. The box body includes an upper cover and a bottom plate, and the upper cover and the bottom plate enclose a containing cavity. The longitudinal beam is connected between the upper cover and the bottom plate, and one end of the longitudinal beam close to the upper cover has a connecting portion for connecting the upper cover and the longitudinal beam. The battery module is arranged in the containing cavity and is arranged on both sides of the longitudinal beam. An insulating film is arranged on the battery module and the longitudinal beam, and the insulating film is provided with a avoiding hole at a position corresponding to the connecting portion, and the connecting portion is exposed from the avoiding hole. The widened insulating film with local perforation is used to replace the surface coating of the longitudinal beam in the prior art. By improving the shape design of the insulating film, the insulating spraying process of the longitudinal beam of the box body is reduced, the assembly process is improved, the assembly of the insulating film is simple, the production efficiency can be improved, the overall structure is compact, and the insulation protection of the battery cell can be effectively realized.

[0061] The utility model embodiment further discloses a vehicle, including any one battery pack 100.

[0062] The battery pack 100 is the power system structure of the vehicle, and the specific structure and function refer to the related content in the foregoing description, which will not be repeated here.

[0063] It should be noted that each embodiment in the present specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other.

[0064] While optional embodiments of the application have been described, those skilled in the art will recognize that many modifications and variations of the described implementations can be made without departing from the scope of the application. It is therefore intended that whatever is described in the appended claims should be interpreted as including all such modifications and variations.

[0065] Finally, it should be noted that, in the specification, relational terms such as first and second and the like can be used solely to distinguish one entity from another entity without necessarily implying any actual relationship or order between such entities. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process or method. An element proceeded by "comprises a", "comprising", or "comprises" does not, without more constraints, preclude the existence of additional identical elements in the process or method.

[0066] The above detailed description of the application has been presented for the purposes of clarity and understanding. It is not intended to be exhaustive or to limit the application to the precise form described. Many modifications and variations are possible in light of the above teaching. It is intended that the scope of the application be limited not with this detailed description, but rather by the claims appended hereto.

Claims

1. A battery pack, characterized by, The battery pack comprises: a box body comprising a top cover and a bottom plate, the top cover and the bottom plate enclosing a receiving cavity; a longitudinal beam connected between the top cover and the bottom plate, the longitudinal beam having a connecting portion at one end close to the top cover; a battery module arranged in the receiving cavity; an insulating film covering the battery module and the longitudinal beam, the insulating film having a clearance hole corresponding to the connecting portion, the connecting portion passing through the clearance hole and being connected with the top cover.

2. The battery pack of claim 1, wherein, The distance between the clearance hole wall and the battery module meets the requirement of creepage distance.

3. The battery pack of claim 1, wherein, The distance between the longitudinal beam and the battery module meets the requirement of electrical clearance.

4. The battery pack of claim 1, wherein, The insulating film wraps a part of the connecting portion, and one side of the connecting portion facing the top cover is exposed.

5. The battery pack of claim 1, wherein, The battery pack has intersecting first and second directions, and the battery module comprises: a cell group comprising a plurality of cells arranged in an array along the first and second directions; an integrated busbar comprising a busbar, a wire harness and a wire harness isolation plate, the wire harness isolation plate having a mounting groove and a wire harness channel, the busbar being arranged in the mounting groove and connected with the cells, the wire harness being arranged in the wire harness channel and connected with the busbar.

6. A battery pack as claimed in claim 5, wherein, The insulating film is in a strip shape, extends along the first direction, and covers the surface of the same column of busbars arranged along the first direction.

7. The battery pack of claim 1, wherein, Further comprising a fastener, the top cover is provided with a mounting hole, and the fastener passes through the mounting hole and the connecting portion to realize the connection between the top cover and the longitudinal beam.

8. The battery pack of claim 1, wherein, Further comprising a cold plate arranged between the battery module and the longitudinal beam, and the surface of the cold plate is sprayed with an insulating coating.

9. The battery pack of claim 1, wherein, The insulating film comprises one of a ceramic composite insulating film, a solid silicone rubber insulating film, a polyimide insulating film, a polyethylene terephthalate insulating film and a mica insulating film.

10. A vehicle characterized by comprising: The battery pack comprises any one of claims 1-9. The battery pack comprises any one of claims 1-9.

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