Battery pack assembly method, battery pack and vehicle

Abstract

A battery pack and a vehicle using the battery pack assembly method. The battery pack includes a housing and a battery module, a cavity is provided within the housing, the battery module includes a foam and a plurality of cells, and the foam is provided between adjacent cells. The battery pack assembly method includes the steps of: placing the battery module in an insulating bag; compressing the foam by drawing a vacuum in the insulating bag to reduce the volume of the battery module; and releasing the vacuum after the reduced-volume battery module is inserted into the cavity to expose the positive and negative electrodes of the battery module.

Description

[Technical Field]

[0001] This disclosure claims priority to a Chinese patent application bearing application number 202110721306.6 and entitled "Battery pack assembly method, battery pack and vehicle," filed with the State Intellectual Property Office of the People's Republic of China on June 28, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of battery pack manufacturing, and more particularly to a battery pack assembly method, a battery pack, and a vehicle. [Background technology]

[0003] In the manufacturing process of a battery pack, multiple cells are typically combined to form a battery module, and the battery module is then assembled into a housing to form the battery pack. A good housing must simultaneously satisfy two requirements: it must be easy to assemble the battery modules and it must be able to apply sufficient clamping force to the battery modules.

[0004] In the prior art, the size of the housing is usually designed to correspond to the size of the battery module so that the housing can continuously apply a clamping force to the battery module, but this makes the assembly of the battery pack very difficult, and it is not possible to manually assemble the battery module into the housing. Applying mechanical force using a mechanical tool is likely to damage the housing or the battery module, while increasing the difficulty of installation and removal and reducing the installation and removal efficiency.

[0005] To solve the above problem, the size of the housing is made much larger than the size of the battery modules, which makes it easier to assemble the battery modules. However, such a housing cannot apply sufficient clamping force to the battery modules, which reduces the volume utilization rate of the battery pack and increases the volume of the battery pack, which increases the space occupied by the battery pack at the bottom of the vehicle and reduces the practicality of the battery pack. Summary of the Invention

[0006] One objective of the present disclosure is to solve at least one of the technical problems existing in the prior art. To this end, the present disclosure provides a method for assembling a battery pack, and a battery pack assembled by the method for assembling a battery pack can improve assembly efficiency and ensure that the housing can continuously apply a clamping force to the battery modules, thereby solving the technical problems of the prior art, such as difficulty in assembling the battery pack, inability of the housing to apply sufficient clamping force to the battery modules after the assembly of the battery pack is completed, and low volume utilization rate of the battery pack.

[0007] A second object of the present disclosure is to provide a battery pack.

[0008] A third object of the present disclosure is to provide a vehicle.

[0009] In a method for assembling a battery pack according to an embodiment of the present disclosure, the battery pack includes a housing and a battery module, with a cavity provided within the housing, the battery module includes a foam and a plurality of cells, with the foam provided between adjacent cells, and the assembly method includes the steps of placing the battery module in an insulating bag, compressing the foam by evacuating the insulating bag to reduce the volume of the battery module, and assembling the reduced-volume battery module in the cavity, and then releasing the vacuum to expose the positive and negative electrodes of the battery module.

[0010] In the battery pack assembly method according to the embodiment of the present disclosure, foam is provided between adjacent cells. Therefore, before assembling the battery modules into the cavities, the battery modules are first placed into insulating bags, and the insulating bags are vacuumed to compress the foam inside the battery modules and reduce the overall volume of the battery modules, facilitating the assembly of the battery modules into the housing and improving assembly efficiency. After the battery modules are assembled into the cavities, the vacuum is released, and the high resilience of the foam itself is utilized to restore the battery modules to their original volume, allowing the battery modules to abut against the inside of the housing, achieving zero-gap assembly, improving the volume utilization rate of the battery pack, and ensuring that the housing can continuously apply a clamping force to the battery modules. In this way, the size of the housing can be designed to correspond to the size of the battery modules, thereby reducing the volume of the housing and further reducing the volume of the battery pack and improving practicality.

[0011] In the method for assembling a battery pack according to one embodiment of the present disclosure, a breakable portion is provided in the insulating bag, and the vacuum state is released by breaking the breakable portion.

[0012] In one embodiment of the present disclosure, the breakable portion is formed in an annular shape and breaks to remove a part of the insulating bag, thereby exposing the positive and negative electrodes.

[0013] In one embodiment of the present disclosure, the insulating bag is provided with a handle, and the breakable portion is broken by pulling the handle.

[0014] In the method for assembling a battery pack according to one embodiment of the present disclosure, a fireproof layer is applied to the insulating bag.

[0015] A battery pack according to an embodiment of the present disclosure includes a housing and a battery module, wherein a cavity is provided within the housing, the battery module is provided within the cavity, and includes foam and a plurality of cells, with the foam provided between adjacent cells, an insulating bag is fitted around the battery module, and the positive and negative electrodes of the battery module extend from the insulating bag.

[0016] In the battery pack according to the embodiment of the present disclosure, the battery modules are disposed in cavities formed in the housing, so that the housing can protect the battery modules, extending the service life of the battery modules and improving the safety of the battery modules. Furthermore, by disposing foam between adjacent cells, the elastic deformation of the foam can be utilized to change the volume of the battery modules, improving the assembly efficiency of the battery pack and ensuring that the housing can continuously apply a clamping force to the battery modules. The positive and negative electrodes of the battery modules extend from the insulating bag, facilitating connection to other battery modules to form a battery pack. The battery pack of the present disclosure is easy to assemble, small in volume, and lightweight.

[0017] In a battery pack according to an embodiment of the present disclosure, a plurality of cavities arranged in sequence are provided within the housing, and the battery module having an insulating bag fitted thereon is provided within each cavity.

[0018] In one embodiment of the present disclosure, the insulating bag is sandwiched between the inner wall of the cavity and the battery module.

[0019] A vehicle according to an embodiment of the present disclosure includes the battery pack described above.

[0020] By using the above-described battery pack, a vehicle according to an embodiment of the present disclosure can reduce the vehicle's weight, extend the vehicle's range, and improve the driving experience without the battery pack occupying a large amount of space at the bottom of the vehicle.

[0021] Additional aspects and advantages of the disclosure will be set forth in the description that follows or may be learned by practice of the disclosure. [Brief explanation of the drawings]

[0022] The above and / or additional aspects and advantages of the present disclosure will become more apparent and easier to understand by describing examples with reference to the following drawings.

[0023] [Figure 1] 1 is a flowchart of a battery pack assembly method according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an exploded view of a battery module and an insulating bag according to an embodiment of the present disclosure. [Figure 3] 1 is a schematic configuration diagram of a battery pack according to an embodiment of the present disclosure. [Figure 4] FIG. 4 is a partial enlarged view of region I in FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, embodiments of the present disclosure will be described in detail, and examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are merely illustrative and are intended to help interpret the present disclosure, and should not be understood as limiting the present disclosure.

[0025] In describing the present disclosure, the orientations or positional relationships expressed by terms such as "thickness," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," "circumferential," etc. are orientations or positional relationships shown based on the drawings, and are intended merely to facilitate and simplify the description of the present disclosure, and do not indicate or suggest that the depicted devices or parts must have a particular orientation, be configured, or operate in a particular orientation, and should not be understood as limiting the present disclosure.

[0026] A method for assembling the battery pack 1000 according to the embodiment of the present disclosure will be described below with reference to the drawings.

[0027] As shown in FIGS. 2 and 3, in the method of assembling a battery pack 1000 according to the embodiment of the present disclosure, the battery pack 1000 includes a housing 100 and a battery module 200, and a cavity 110 is provided in the housing 100.

[0028] As shown in FIG. 2, the battery module 200 includes a form 210 and a plurality of cells 220, with the form 210 provided between adjacent cells 220.

[0029] As shown in FIG. 1, the battery pack 1000 is assembled as follows: Step S1: placing the battery module 200 in an insulating bag 300; Step S2: evacuating the insulating bag 300 to compress the foam 210 and reduce the volume of the battery module 200; After the volume-reduced battery module 200 is inserted into the cavity 110, the vacuum state is released to expose the positive and negative electrodes of the battery module 200 in step S3.

[0030] As can be seen from the above method, in the assembly method of the battery pack 1000 of the embodiment of the present disclosure, the foam 210 is provided between the adjacent cells 220, and the foam 210 can be deformed under the action of an external force and can recover to its original size and shape when the external force is removed. Therefore, the present disclosure utilizes the properties of the foam 210 itself, and before the battery module 200 is inserted into the cavity 110, the battery module 200 is first placed in the insulating bag 300, and the insulating bag 300 is evacuated, thereby deforming the foam 210 in the battery module 200. and compressing the gaps between adjacent cells 220, reducing the volume of foam 210, further reducing the distance between adjacent cells 220, and reducing the overall size of battery module 200. In the process of specifically assembling battery pack 1000, battery module 200 with a small volume can be smoothly assembled into cavity 110 of housing 100, improving assembly efficiency, reducing friction between battery module 200 and housing 100, reducing wear, and extending the service life of battery module 200 and housing 100.

[0031] After the battery module 200 is inserted into the cavity 110, the vacuum state of the insulating bag 300 is released, at which time the foam 210 recovers to its original size and shape using its high resilience, further increasing the distance between adjacent cells 220, and the battery module 200 recovers to its original volume and abuts against the inside of the housing 100, achieving zero-gap assembly and improving the volume utilization rate of the battery pack 1000.

[0032] Since the battery module 200 abuts against the inside of the housing 100, the side walls of the housing 100 can apply a sufficient clamping force to the battery module 200, thereby stabilizing the position of the battery module 200.

[0033] Furthermore, by assembling the battery pack 1000 using the above assembly method, the size of the casing 100 can be manufactured to correspond to the size of the battery module 200 during the manufacturing process of the casing 100. This means that the battery module 200 can be quickly and accurately assembled within the casing 100 without having to specially manufacture a large-sized casing 100, thereby reducing the difficulty of assembly and the volume of the casing 100. This reduces the amount of material used in the casing 100 and reduces manufacturing costs. Secondly, the volume of the battery pack 1000 is reduced, so when the battery pack 1000 is attached to a vehicle, it does not occupy a large amount of space at the bottom of the vehicle, improving the practicality of the battery pack 1000. Thirdly, the weight of the battery pack 1000 is reduced, which makes it possible to reduce the weight of the battery pack 1000 and extend the vehicle's driving range.

[0034] By exposing the positive and negative electrodes of the battery modules 200, it becomes easier to form a battery pack 1000 by connecting adjacent battery modules 200 by their positive and negative electrodes.

[0035] It should be understood that by assembling the battery pack 1000 using the assembly method for the battery pack 1000 disclosed herein, technical problems such as difficulty in assembly or the inability of the casing 100 to apply sufficient clamping force to the battery module 200 do not occur, and the battery pack 1000 assembled using the above assembly method improves the assembly efficiency of the battery pack 1000 and ensures that the casing 100 can apply sufficient clamping force to the battery module 200, thereby realizing zero-gap assembly, improving the volume utilization rate of the battery pack 1000, and reducing the volume of the battery pack 1000.

[0036] In describing this disclosure, unless otherwise stated, "plurality" means two or more.

[0037] In one embodiment of the present disclosure, the insulating bag 300 has an opening (not shown) at one end, and a sealing structure is provided at the opening. The sealing structure opens and closes the opening. When it is necessary to place the battery module 200 inside the insulating bag 300, the opening is opened by the sealing structure, and the battery module 200 is placed inside the insulating bag 300 through the opening. After the battery module 200 is placed inside the insulating bag 300, the opening is closed by the sealing structure, and the insulating bag 300 forms a sealed structure, which facilitates subsequent evacuation of the insulating bag 300.

[0038] In one embodiment of the present disclosure, an air valve (not shown) is provided in the insulating bag 300, and in the process of evacuating the insulating bag 300, an exhaust pump connected to the air valve can be used, and the exhaust pump can operate to extract the air from the insulating bag 300.

[0039] The main principle is to extract the air inside the foam 210 and use atmospheric pressure to compress the foam 210, which is originally expanding, to reduce the volume of the foam 210, and further reduce the distance between adjacent cells 220, thereby reducing the overall size of the battery module 200, thereby ensuring that the battery module 200 can be smoothly assembled into the cavity 110 and improving the assembly efficiency of the battery pack 1000.

[0040] In one embodiment of the present disclosure, the air valve is a one-way air valve, which ensures that the air in the insulating bag 300 can only be extracted in one direction and prevents backflow of air in the insulating bag 300. When the vacuum state of the insulating bag 300 is not released, it ensures that the insulating bag 300 is always in a vacuum state, which makes it easy to insert the battery module 200 into the cavity 110.

[0041] In one embodiment of the present disclosure, the insulating bag 300 may be made of insulating materials such as polypropylene, polyethylene terephthalate, or polyimide, etc. Any of the above materials can ensure that the insulating bag 300 has good insulating effect and can ensure that two adjacent battery modules 200 do not come into contact with each other and cause an internal short circuit when the battery pack 1000 moves or is hit, thereby extending the service life of the battery modules 200 and improving the safety of the battery modules 200.

[0042] 2 and 3 , in some embodiments of the present disclosure, an insulating bag 300 is provided with a breakable portion 310, and the vacuum is released by breaking the breakable portion 310. That is, if it is necessary to release the vacuum in the insulating bag 300 after the volumetrically contracted battery module 200 is inserted into the cavity 110, the vacuum in the insulating bag 300 can be released simply by breaking the breakable portion 310, and the foam 210 recovers to its original size and shape due to its high resilience, and the battery module 200 recovers to its original volume, thereby achieving zero-gap assembly of the battery module 200 and the housing 100.

[0043] Of course, an opening is formed at one end of the insulating bag 300, and a sealing structure is provided at the opening. If it is necessary to release the vacuum in the insulating bag 300, the opening may be opened by the sealing structure, and at this time, external air enters the insulating bag 300 through the opening, releasing the vacuum in the insulating bag 300, causing the foam 210 to recover to its original size and shape, and the battery module 200 to recover to its original volume.

[0044] The purpose of releasing the vacuum state of the insulating bag 300 using the intended rupture portion 310 is mainly to remove a portion of the insulating bag 300, thereby ensuring that the positive and negative electrodes of the battery module 200 are exposed to the outside of the insulating bag 300 after the vacuum state of the insulating bag 300 is released, and adjacent battery modules 200 are connected by their positive and negative electrodes.

[0045] In one embodiment of the present disclosure, the breakable portion 310 is formed in an annular shape and is broken to remove a portion of the insulating bag 300, thereby exposing the positive and negative electrodes. The term "annular" here means that the breakable portion 310 is provided so as to go around the entire circumference of the insulating bag 300. When the breakable portion 310 is broken, the insulating bag 300 located on both sides of the breakable portion 310 is separated, and the insulating bag 300 adjacent to the positive and negative electrodes of the battery module 200 is removed, thereby exposing the positive and negative electrodes of the battery module 200.

[0046] Note that the damage and breakage of the planned breakage portion 310 are two different states. Damage to the planned breakage portion 310 refers to the insulating bag 300 breaking at the planned breakage portion 310. When the planned breakage portion 310 begins to break, the vacuum state of the insulating bag 300 is released, but the positive and negative electrodes of the battery module 200 are not exposed to the outside of the insulating bag 300. When the planned breakage portion 310 progresses from damage to breakage, the positive and negative electrodes of the battery module 200 are exposed to the outside of the insulating bag 300.

[0047] 4 , in one embodiment of the present disclosure, the insulating bag 300 is provided with a handle 320, and the breakable portion 310 is broken by pulling the handle 320. When the user needs to release the vacuum in the insulating bag 300, the handle 320 increases the contact area between the user and the insulating bag 300, and the user applies a force to the insulating bag 300 using the handle 320 that is sufficient to smoothly break the breakable portion 310, thereby releasing the vacuum in the insulating bag 300. Thereafter, the user continues to apply a force to the breakable portion 310 so that the breakable portion 310 progresses from being broken to being broken, separating the insulating bag 300 located on both sides of the breakable portion 310 and exposing the positive and negative electrodes of the battery module 200 to the outside of the insulating bag 300.

[0048] 4, in one embodiment of the present disclosure, handle 320 is provided at one end of insulating bag 300 and extends in a direction away from insulating bag 300. By increasing the area of ​​handle 320, a user can easily contact handle 320 and apply force to break and rupture intended rupture portion 310 with handle 320, thereby allowing intended rupture portion 310 to be smoothly broken and ruptured.

[0049] As shown in FIGS. 3 and 4, in one embodiment of the present disclosure, the breakable portion 310 is provided at one end of the insulating bag 300 and is adjacent to the handle 320. By reducing the distance between the intended rupture portion 310 and the handle 320, the user can pull the handle 320 to smoothly break and rupture the intended rupture portion 310. However, because the handle 320 is only pulled after the battery module 200 has been inserted into the cavity 110 to break the intended rupture portion 310, once the intended rupture portion 310 is broken, the battery module 200 abuts against the inner wall of the housing 100, and at this time, the insulating bag 300 abuts against the inner wall of the housing 100 together with the battery module 200. This reduces the contact area between the insulating bag 300 and the housing 100 between the intended rupture portion 310 and the handle 320, and after the intended rupture portion 310 is broken, the insulating bag 300 located between the intended rupture portion 310 and the handle 320 can be smoothly removed from the housing 100, ensuring that the positive and negative electrodes of the battery module 200 are exposed.

[0050] Of course, the distance between the rupture portion 310 and the handle 320 should not be too small. If the distance between the rupture portion 310 and the handle 320 is too small, the positive and negative electrodes of the battery module 200 cannot be exposed after the insulating bag 300 located between the rupture portion 310 and the handle 320 is removed.

[0051] The distance between the breakable portion 310 and the handle 320 is not specifically limited, but only needs to ensure that after the breakable portion 310 breaks, the insulating bag 300 located between the breakable portion 310 and the handle 320 can be smoothly removed from inside the housing 100, and that the positive and negative electrodes of the battery module 200 can be exposed to the outside of the insulating bag 300.

[0052] In one embodiment of the present disclosure, during the manufacturing process of the insulating bag 300, the thickness of the intended breaking portion 310 of the insulating bag 300 is made smaller than the thickness of other positions on the insulating bag 300, thereby forming the intended breaking portion 310, and ensuring that when a user pulls the handle 320, the insulating bag 300 will break and rupture at the intended breaking portion 310.

[0053] In some embodiments of the present disclosure, a fire-resistant layer is applied to the insulating bag 300. The fire-resistant layer can effectively block the propagation path of thermal runaway, and when the battery pack 1000 experiences thermal runaway, the insulating bag 300 with the fire-resistant layer applied thereto can effectively block the propagation of flame and heat, thereby improving the safety of the battery module 200. When the cell 220 experiences thermal runaway, the insulating bag 300 can effectively ensure that the flame and heat are not transmitted to the outside of the battery module 200, without endangering the safety of the user.

[0054] In one embodiment of the present disclosure, during the manufacturing process of the battery module 200, the surface of the insulating bag 300 can be sprayed with Teflon or covered with mica paper to form a high-temperature fireproof layer, thereby effectively blocking heat transfer.

[0055] A battery pack 1000 according to an embodiment of the present disclosure will be described below with reference to the drawings.

[0056] As shown in FIGS. 2 and 3, a battery pack 1000 according to an embodiment of the present disclosure includes a housing 100 and a battery module 200, in which a cavity 110 is provided within the housing 100 and the battery module 200 is provided within the cavity 110.

[0057] As shown in FIG. 2, the battery module 200 includes a form 210 and a plurality of cells 220, with the form 210 provided between adjacent cells 220.

[0058] 2 and 3, an insulating bag 300 is fitted around the battery module 200, and the positive and negative electrodes of the battery module 200 extend out from the insulating bag 300. That is, the positive and negative electrodes of the battery module 200 extend to the outside of the insulating bag 300.

[0059] As can be seen from the above structure, the battery pack 1000 of the embodiment of the present disclosure has a cavity 110 formed in the housing 100, which provides clearance space for the placement of the battery module 200, thereby ensuring that the battery module 200 can be assembled inside the housing 100. When the battery module 200 is assembled in the cavity 110, the cavity 110 serves to protect the battery module 200. When the battery pack 1000 is impacted, the cavity 110 collapses to absorb the energy, and the housing 100 uses its own strength and rigidity to absorb part of the impact force, thereby reducing damage to the battery module 200 caused by the impact. Meanwhile, the cavity 110 provides mounting space for the battery module 200 and limits the maximum movement position of the battery module 200, preventing the battery module 200 from shifting and moving to another position in the battery pack 1000 when the battery pack 1000 is impacted, thereby improving the positional stability of the battery module 200.

[0060] By providing the foam 210 between adjacent cells 220, the foam 210 plays a buffering role during the assembly process of the battery module 200, ensuring that no collisions occur between adjacent cells 220 and extending the service life of the cells 220. The foam 210 not only provides a certain clamping force during the initial assembly of the cells 220, but also absorbs the expansion force caused by the cells 220 when the battery module 200 is later used.

[0061] During the assembly process of the battery module 200 and the housing 100, the foam 210 is used to reduce the volume of the battery module 200, making it easier to assemble the battery module 200 into the cavity 110 formed in the housing 100, improving the assembly efficiency of the battery module 200 and the housing 100 and reducing the difficulty of assembly. After the assembly of the battery module 200 and the housing 100 is completed, the foam 210 can be further used to restore the battery module 200 to its original volume and abut the battery module 200 against the inner wall of the housing 100, so that the side wall of the housing 100 can apply sufficient clamping force to the battery module 200, stabilizing the position of the battery module 200, achieving zero-gap assembly, and improving the volume utilization rate of the battery pack 1000.

[0062] By fitting the insulating bag 300 around the battery module 200, when the battery pack 1000 moves or is hit, two adjacent battery modules 200 will not come into contact with each other and cause an internal short circuit, thereby extending the service life of the battery module 200 and improving the safety of the battery module 200.

[0063] By extending the positive and negative electrodes of the battery modules 200 to the outside of the insulating bag 300, the battery modules 200 in the battery pack 1000 can be connected by the positive and negative electrodes to form the battery pack 1000.

[0064] In one embodiment of the present disclosure, the cells 220 and the foam 210 are bonded with a structural adhesive, which limits the position between the cells 220 and the foam 210 and improves the structural stability of the battery module 200.

[0065] 3 , in some embodiments of the present disclosure, a plurality of cavities 110 are provided in a housing 100, arranged in sequence, and a battery module 200 fitted with an insulating bag 300 is provided in each cavity 110. That is, a plurality of battery modules 200 are provided in the housing 100 of the present disclosure, and the plurality of cavities 110 separate the plurality of battery modules 200, ensuring that two adjacent battery modules 200 do not come into contact with each other during operation of the battery pack 1000, thereby improving the safety of the battery modules 200. By fitting the insulating bag 300 around the battery module 200, the insulating bag 300 further improves the safety of the battery module 200. By providing a plurality of battery modules 200 in the battery pack 1000, the present disclosure can meet the demand for large-capacity and high-voltage batteries in a vehicle and extend the driving range of the vehicle.

[0066] In some embodiments of the present disclosure, the insulating bag 300 is sandwiched between the inner wall of the cavity 110 and the battery module 200. That is, after the battery module 200 is inserted into the cavity 110, the insulating bag 300 wrapped around the outside of the battery module 200 does not need to be removed, which reduces the difficulty of assembling the battery pack 1000, and the insulating bag 300 wrapped around the outside of the battery module 200 serves as an insulating material, thereby improving the safety of the battery module 200.

[0067] A vehicle according to an embodiment of the present disclosure will be described below.

[0068] A vehicle according to an embodiment of the present disclosure includes the battery pack 1000 described above.

[0069] As can be seen from the above structure, the vehicle of the embodiment of the present disclosure uses the above-mentioned battery pack 1000, which allows the battery pack 1000 to reduce the vehicle's weight, improve the driving experience, and extend the vehicle's range without occupying a large amount of space at the bottom of the vehicle.

[0070] Hereinafter, the specific structure of the battery pack 1000 in the specific embodiment of the present disclosure will be described with reference to the drawings. The embodiment of the present disclosure is not limited to the specific embodiment below, and may be any embodiment that combines the above-mentioned technical means, and all of these embodiments are within the scope of protection of the present disclosure. [Example]

[0071] As shown in FIGS. 2 and 3, the battery pack 1000 includes a housing 100 and a battery module 200. A cavity 110 is provided in the housing 100, and the battery module 200 is provided in the cavity 110.

[0072] As shown in FIG. 2, the battery module 200 includes a form 210 and a plurality of cells 220, with the form 210 provided between adjacent cells 220.

[0073] As shown in Figures 2 and 3, an insulating bag 300 is fitted around the battery module 200. When assembling the battery pack 1000, the battery module 200 is placed inside the insulating bag 300 and the insulating bag 300 is evacuated, thereby compressing the foam 210 and reducing the volume of the battery module 200. After the reduced-volume battery module 200 is inserted into the cavity 110, the vacuum is released, causing the positive and negative electrodes of the battery module 200 to extend out from the insulating bag 300. [Example]

[0074] The battery pack 1000 is based on Example 1 and has a handle 320 provided on the insulating bag 300, a breakable portion 310 formed in a ring shape, and by pulling the handle 320, the breakable portion 310 is broken, thereby releasing the vacuum state of the insulating bag 300.

[0075] The breakable portion 310 breaks to remove a part of the insulating bag 300, thereby exposing the positive and negative electrodes of the battery module 200.

[0076] In the description of this disclosure, unless otherwise clearly specified or limited, the terms "attach" and "connect" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection, or may refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meanings of the above terms in the present disclosure according to specific circumstances.

[0077] The method of assembling the battery pack 1000 according to the embodiment of the present disclosure, the battery pack 1000 and other components of the vehicle, such as the principle of evacuating the insulating bag 300, are known to those skilled in the art and will not be described in detail here.

[0078] In the description herein, a description that refers to the term "embodiment," "example," or the like means that the specific feature, structure, material, or characteristic described in combination with the embodiment or example is included in at least one embodiment or example of the present disclosure. In the description herein, exemplary descriptions for the above terms are not necessarily limited to the same embodiment or example. Furthermore, the specific feature, structure, material, or characteristic described may be combined as appropriate in any one or more embodiments or examples.

[0079] Although embodiments of the present disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present disclosure, and that the scope of the present disclosure is limited by the claims and their equivalents. [Explanation of symbols]

[0080] 1000 battery packs 100 cabinets 110 cavity 200 battery modules 210 Forms 220 cells 300 Insulation Bag 310 Breaking part 320 Handle

Claims

1. A method for assembling a battery pack (1000), the battery pack (1000) including a housing (100) and a battery module (200), a cavity (110) provided in the housing (100), the battery module (200) including a foam (210) and a plurality of cells (220), the foam (210) being provided between adjacent cells (220), the assembling method comprising the steps of: placing the battery module (200) in an insulating bag (300); A step of compressing the foam (210) by drawing a vacuum in the insulating bag (300) to reduce the volume of the battery module (200); and after the volume-reduced battery module (200) is inserted into the cavity (110), releasing the vacuum to expose the positive and negative electrodes of the battery module (200).

2. 2. The method for assembling a battery pack (1000) according to claim 1, wherein the insulating bag (300) is provided with a breakable portion (310), and the vacuum state is released by breaking the breakable portion (310).

3. 3. The method for assembling a battery pack (1000) according to claim 2, wherein the intended breaking portion (310) is formed in a ring shape and is broken to remove a portion of the insulating bag (300), thereby exposing the positive and negative electrodes.

4. 3. The method for assembling a battery pack (1000) according to claim 2, wherein a handle (320) is provided on the insulating bag (300), and the breakable portion (310) is broken by pulling the handle (320).

5. The method for assembling a battery pack (1000) according to any one of claims 1 to 4, characterized in that a fireproof layer is applied to the insulating bag (300).

6. A battery pack (1000) including a housing (100) and a battery module (200), A cavity (110) is provided within the housing (100), The battery module (200) is provided in the cavity (110), the battery module (200) includes a foam (210) and a plurality of cells (220), the foam (210) being compressed between adjacent cells (220), and an insulating bag (300) is fitted around the battery module (200); The battery pack (1000) is characterized in that the positive and negative electrodes of the battery module (200) extend from the insulating bag (300).

7. The battery pack (1000) according to claim 6, characterized in that the housing (100) has a plurality of cavities (110) arranged in sequence, and each cavity (110) has a battery module (200) fitted with an insulating bag (300).

8. The battery pack (1000) according to claim 6, wherein the insulating bag (300) is sandwiched between an inner wall of the cavity (110) and the battery module (200).

9. A vehicle comprising the battery pack (1000) according to any one of claims 6 to 8.

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