Battery pack shell, battery pack and vehicle

Abstract

The utility model provides a battery pack shell, a battery pack and a vehicle. The battery pack shell comprises a bottom plate, an edge beam assembly and an expansion beam, the boundary beam assembly is arranged on the peripheral side of the bottom plate in a surrounding mode, and the boundary beam assembly and the bottom plate define a battery pack shell; the edge beam assembly is provided with at least two connecting parts, the at least two connecting parts are arranged at intervals in the length direction of the edge beam assembly, and the expansion beam is detachably connected with any one of the at least two connecting parts. According to the battery pack shell, the mounting positions of the expansion beams are adjustable, and the expansion beams can still provide effective constraint and fixation for the battery cells under the condition that the number of the battery cells is changed, so that the probability of collision, damage or thermal runaway of the battery cells can be reduced. In addition, the battery pack shell can adapt to battery packs with different electric quantities, so that the use flexibility and universality of the battery pack shell are improved, and the mold design and development cost is saved.

Description

TECHNICAL FIELD

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

[0002] The expansion beam is an important component in the battery pack shell, which is usually fixed in the battery pack shell. The expansion beam can constrain and fix the battery cell, bear and disperse the expansion force generated during the charging and discharging process of the battery cell, so as to avoid damage of the battery cell in the case of vibration or collision, and ensure the safety and stability of the battery pack.

[0003] However, during the development of the battery pack, the number of battery cells arranged in the same battery pack shell may be different. If the number of battery cells changes, the expansion beam may not be in effective contact with the battery cells, so as to fail to provide effective constraint and fixation for the battery cells, which greatly increases the probability of collision, damage or thermal runaway of the battery cells, and is not conducive to the safe operation of the battery pack. UTILITY MODEL CONTENT

[0004] Therefore, the present application aims to provide a battery pack shell, a battery pack and a vehicle to at least solve the problem that the existing expansion beam cannot meet the constraint requirements of different numbers of battery cells, which is not conducive to the safe operation of the battery pack.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] The present application provides a battery pack shell, which comprises a bottom plate, a side beam assembly and an expansion beam. The side beam assembly is arranged around the periphery of the bottom plate, and the side beam assembly and the bottom plate form the battery pack shell. At least two connecting parts are arranged on the side beam assembly, and the at least two connecting parts are arranged at intervals along the length direction of the side beam assembly. The expansion beam is detachably connected with any one of the at least two connecting parts.

[0007] Further, each connecting part comprises a plurality of connecting holes arranged at intervals along the height direction of the side beam assembly, or each connecting part is a limiting groove, or each connecting part is a limiting protrusion.

[0008] Further, the side beam assembly comprises a main beam and a side collision prevention beam. The main beam is arranged around the periphery of the bottom plate and is fixedly connected with the bottom plate, and a containing cavity is formed between the main beam and the bottom plate. The battery pack shell has a side collision point, and the side collision prevention beam is arranged at the position of the side collision point and is detachably connected with the side of the main beam close to the containing cavity. The at least two connecting parts are arranged on the side collision prevention beam.

[0009] Furthermore, the side impact beam includes a first beam and a second beam, the first beam and the second beam are detachably connected, and the position of the detachable connection between the first beam and the second beam is adjustable in the length direction of the side impact beam.

[0010] Furthermore, the first beam and the second beam are provided with a set of connecting holes, which are used to insert fasteners to detachably connect the first beam and the second beam; there are at least two sets of connecting holes on the first beam and / or the second beam, and at least two sets of connecting holes are spaced apart along the length direction of the first beam and / or the second beam.

[0011] Furthermore, the anti-side collision beam includes a first beam and a second beam. The first beam is detachably connected to the main beam. The first beam is provided with a slide rail arranged along its length, and the second beam is slidably connected to the slide rail.

[0012] Furthermore, the anti-side impact beam has connecting portions at both ends along its length; there are two expansion beams, which are located at both ends of the anti-side impact beam along its length and are detachably connected to the corresponding connecting portions. The anti-side impact beam and the two expansion beams form a cuboid structure.

[0013] Furthermore, the side impact beam is provided with the connecting portion at its middle along its length; the battery pack housing also includes a reinforcing beam, which is disposed between the two expansion beams and is detachably connected to the connecting portion at the middle of the side impact beam.

[0014] Furthermore, the bottom surface of the expansion beam and / or the anti-side impact beam is adhesively bonded to the base plate.

[0015] This application also provides a battery pack, including a plurality of battery cells, a top cover and a battery pack housing as described in any of the preceding claims, wherein the plurality of battery cells are housed within the battery pack housing and the top cover is fixedly connected to the battery pack housing.

[0016] Furthermore, it also includes a high-voltage control module and a conductive busbar; the high-voltage control module is located on the outside of the battery pack housing and is detachably connected to the battery pack housing; the high-voltage control module is electrically connected to the plurality of battery cells through the conductive busbar.

[0017] This application also provides a vehicle including the battery pack described in any of the foregoing claims.

[0018] Compared with the prior art, the battery pack housing, battery pack, and vehicle described in this application have the following advantages:

[0019] The battery pack housing described in this application has at least two connecting parts on the side beam assembly. The expansion beam is detachably connected to any one of the at least two connecting parts, allowing the installation position of the expansion beam within the battery pack housing to be adjustable. This ensures that even when the number of battery cells changes, the expansion beam can still effectively constrain and fix the cells, reducing the probability of cell impacts, damage, or thermal runaway, thus improving the operational safety of the battery pack. Furthermore, it allows the battery pack housing to be adapted to battery packs with different capacities, effectively improving the flexibility and versatility of the battery pack housing, thereby saving on mold design and development costs and helping to control battery pack production costs.

[0020] The battery pack and vehicle described in this application have the same advantages over the prior art as the aforementioned battery pack housing, and will not be repeated here. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a schematic diagram illustrating the removal of the top cover from a battery pack according to an embodiment of this application;

[0023] Figure 2 This is a top view of a battery pack with the top cover removed, as described in an embodiment of this application.

[0024] Figure 3 for Figure 2 A schematic diagram of a cross-section cut along the AA direction;

[0025] Figure 4 This is a schematic diagram illustrating the connection between an expansion beam and a side-impact beam as described in an embodiment of this application;

[0026] Figure 5 This is an exploded view of the structure of a battery pack according to an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of a battery pack according to an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 01-Battery pack casing, 02-Top cover;

[0030] 1-Base plate, 10-Accommodation cavity, 2-Side beam assembly, 20-Connecting part, 21-Main beam, 22-Anti-side collision beam, 221-First beam body, 222-Second beam body, 223-Connecting hole group, 3-Expansion beam, 4-Battery cell, 5-High voltage control module, 6-Conductive busbar. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The described embodiments are only a part of the embodiments of this application, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] It should be understood that the phrase "in one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0034] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Figure 1 A schematic diagram showing the removal of the top cover 02 of a battery pack is shown. Figure 2 A top view of a battery pack with the top cover 02 removed is shown, with reference to... Figure 1 and Figure 2 This application provides a battery pack housing, including a base plate 1, a side beam assembly 2, and an expansion beam 3; the side beam assembly 2 surrounds the periphery of the base plate 1, and the side beam assembly 2 and the base plate 1 form a battery pack housing; the side beam assembly 2 is provided with at least two connecting parts 20, and the at least two connecting parts 20 are spaced apart along the length direction of the side beam assembly 2, and the expansion beam 3 is detachably connected to any one of the at least two connecting parts 20.

[0036] Specifically, the battery pack housing is formed by a base plate 1 and side beam assemblies 2. The side beam assemblies 2 surround the periphery of the base plate 1 and are fixedly connected to it. The side beam assemblies 2 and the base plate 1 can be fixedly connected by laser welding or by using bolts, screws, or other fasteners to ensure the structural stability and reliability of the battery pack housing. Alternatively, the battery pack housing can be manufactured as a single piece using an integral molding process, eliminating the need for subsequent connection of the side beam assemblies 2 to the base plate 1. This ensures both structural stability and reliability while helping to control production costs. Typically, the battery pack housing has a cubic structure, so the base plate 1 is a rectangular plate, and the side beam assemblies 2 surround the periphery of the base plate 1.

[0037] The battery pack housing has a receiving cavity 10, and an expansion beam 3 is disposed within the receiving cavity 10. Multiple battery cells 4 of the battery pack are also disposed within the receiving cavity 10. The expansion beam 3 can constrain and fix the multiple battery cells 4, so that the battery cells 4 can be kept in a predetermined position, reducing the risk of displacement or damage to the battery cells 4 due to vibration or impact. The expansion beam 3 can also withstand and disperse the expansion force generated by the battery cells 4 during charging and discharging, protecting the structural integrity of the battery cells 4. The expansion beam 3 can also serve as a heat conduction medium, helping to transfer the heat generated by the battery cells 4 during operation to the battery pack housing, and then diffuse it to the external environment, thereby helping to improve the heat dissipation efficiency of the battery cells 4 and preventing the battery cells 4 from overheating.

[0038] In addition, the expansion beam 3 can be made of insulating materials, such as glass fiber reinforced composite materials or carbon fiber reinforced composite materials, or high-strength steel or aluminum alloys, but with an insulating layer covering its surface. This allows the expansion beam 3 to provide insulation and isolation for the battery cells 4, preventing short circuits caused by electrical contact between the battery cells 4 or between the battery cells 4 and other components. Furthermore, the expansion beam 3 can be manufactured using injection molding or die casting processes to reduce its weight and facilitate lightweight design of the battery pack casing. Alternatively, the expansion beam 3 can be made of a high-strength and high-rigidity material, such as hard steel or steel-aluminum alloys, allowing it to replace the side beam on one side of the battery pack casing.

[0039] During the battery pack development stage, the number of battery cells 4 arranged inside the battery pack housing may vary depending on the battery pack capacity. In traditional battery pack housings, the installation position of the expansion beam 3 within the housing cannot be adjusted. If the number of battery cells 4 changes, the expansion beam 3 may not be able to effectively contact the battery cells 4, thus failing to provide effective constraint and fixation. This significantly increases the probability of the battery cells 4 being bumped, damaged, or experiencing thermal runaway. In this embodiment, the side beam assembly 2 is provided with at least two connecting portions 20, which are spaced apart along the length direction of the side beam assembly 2. The length direction of the side beam assembly 2 is as follows:Figure 1 and Figure 2 As shown in the X direction, the expansion beam 3 is detachably connected to any one of at least two connecting portions 20, thus allowing the mounting position of the expansion beam 3 within the battery pack housing to be adjustable. (Refer to...) Figure 1 and Figure 2 As shown, if the number of battery cells 4 increases, that is, the total length of battery cells 4 along the X direction becomes longer, then the connection part 20 on the side of the expansion beam 3 and the side beam assembly 2 can be detached to accommodate the constraint and fixation requirements of more battery cells 4; if the number of battery cells 4 decreases, that is, the total length of battery cells 4 along the X direction becomes shorter, then the connection part 20 on the center of the expansion beam 3 and the side beam assembly 2 can be detached to accommodate the constraint and fixation requirements of fewer battery cells 4; this effectively improves the constraint and fixation effect of the expansion beam 3 on the battery cells 4, thereby helping to reduce the probability of battery cells 4 being bumped, damaged or experiencing thermal runaway.

[0040] Furthermore, in traditional methods, to address the issue of the expansion beam 3 failing to effectively constrain and fix the battery cells 4, various specifications of battery pack housings are typically developed during the battery pack development phase. Different battery packs with different capacities are adapted to different specifications of battery pack housings to accommodate different numbers of battery cells 4, which significantly increases design and development costs. However, in the embodiment of this application, the battery pack housing, through the detachable connection between the expansion beam 3 and the connecting portion 20 on the side beam assembly 2, allows for the placement of different numbers of battery cells 4 and adaptability to battery packs with different capacities. This effectively improves the flexibility and versatility of the battery pack housing and saves on mold design and development costs.

[0041] The battery pack housing of this embodiment has at least two connecting portions 20 on the side beam assembly 2. The expansion beam 3 is detachably connected to any one of the at least two connecting portions 20, which allows the installation position of the expansion beam 3 within the battery pack housing to be adjustable. This ensures that even if the number of battery cells 4 changes, the expansion beam 3 can still effectively constrain and fix the battery cells 4, reducing the probability of the battery cells 4 being bumped, damaged, or experiencing thermal runaway, thus improving the operational safety of the battery pack. Furthermore, it allows the battery pack housing to be adapted to battery packs with different capacities, effectively improving the flexibility and versatility of the battery pack housing, thereby saving on mold design and development costs and helping to control the production cost of the battery pack.

[0042] Furthermore, in some embodiments of this application, each connecting portion 20 includes a plurality of connecting holes, which are spaced apart along the height direction of the side beam assembly 2; or, each connecting portion 20 is a limiting groove; or, each connecting portion 20 is a limiting protrusion.

[0043] Specifically, the connecting portion 20 on the side beam assembly 2 can be in the form of a connecting hole. The connecting hole can be a through hole that penetrates the side beam assembly 2 along its thickness direction, or it can be a blind hole that does not penetrate the side beam assembly 2. The connecting hole is used to pass through fasteners such as bolts and screws to achieve a detachable connection between the side beam assembly 2 and the expansion beam 3. In some embodiments, the connecting hole can be a threaded hole to improve the reliability of the connection.

[0044] To ensure the reliability of the connection between the beam assembly and the expansion beam 3, multiple connection holes can be provided, spaced apart along the height direction of the side beam assembly 2, as shown in the figure below. Figure 1 As shown in the Z direction, the larger the height of the side beam assembly 2, the more connection holes can be; conversely, the smaller the height of the side beam assembly 2, the fewer connection holes can be, thus reducing the impact of the connection holes on the strength of the side beam assembly 2 itself. The spacing between multiple connection holes can be the same or different, depending on the actual connection requirements; this embodiment does not impose any restrictions on this.

[0045] Alternatively, the connecting part 20 on the side beam assembly 2 can be in the form of a limiting groove, and the end of the expansion beam 3 is provided with a protrusion. The protrusion and the limiting groove are engaged to realize the detachable connection between the side beam assembly 2 and the expansion beam 3.

[0046] Alternatively, the connecting part 20 on the side beam assembly 2 can be in the form of a limiting protrusion, and the end of the expansion beam 3 is provided with a groove. The limiting protrusion and the groove are engaged to realize the detachable connection between the side beam assembly 2 and the expansion beam 3.

[0047] Furthermore, Figure 3 It shows Figure 2 A schematic diagram of a cross-section taken along the AA direction, see reference. Figures 1 to 3 In some embodiments of this application, the side beam assembly 2 includes a main beam 21 and a side impact beam 22. The main beam 21 surrounds the periphery of the base plate 1 and is fixedly connected to the base plate 1. The main beam 21 and the base plate 1 form an accommodating cavity 10. The battery pack housing has a side impact point. The side impact beam 22 is located at the side impact point and is detachably connected to the side of the main beam 21 near the accommodating cavity 10. At least two connecting parts 20 are provided on the side impact beam 22.

[0048] Specifically, the main beam 21 is fixedly connected to the base plate 1, and the main beam 21 and the base plate 1 form the main frame of the battery pack housing. A cavity 10 for accommodating the battery cells is formed between the main beam 21 and the base plate 1. The side impact point of the battery pack housing refers to the location on the battery pack housing that first contacts the colliding object or is most susceptible to impact during a side collision. These points are crucial for assessing the safety of the battery pack under side collision conditions. The anti-side impact beam 22 is located at the side impact point of the battery pack housing and is detachably connected to the side of the main beam 21 near the cavity 10. Specifically, the anti-side impact beam 22 is usually partially connected to the main beam 21 to avoid excessively increasing the weight burden of the battery pack. Simultaneously, the anti-side impact beam 22 is usually detachably connected to the oppositely positioned main beam 21, providing effective buffering and protection in the event of a side impact. The anti-side impact beam 22 and the main beam 21 can be detachably connected using fasteners such as bolts and screws, or through a limiting snap-fit ​​connection. The side impact beam 22 can be made of high-strength steel, aluminum alloy or composite material, with sufficient strength and rigidity to effectively resist side impacts of the battery pack, protect the structural integrity of the battery pack casing, thereby improving the safety of the battery pack in the event of a side impact and protecting the battery cells 4 inside the battery pack casing from damage.

[0049] Additionally, it should be noted that the vehicle has a side pole impact point. The side pole impact point refers to the point where the vehicle contacts and impacts a pole-shaped object during a side collision. The side pole impact point is a key factor in assessing a vehicle's side impact capability and significantly impacts its safety performance. When the battery pack is installed inside the vehicle, the position of the side impact point on the battery pack housing needs to match the position of the vehicle's side pole impact point. That is, the position of the side impact beam 22 inside the battery pack housing needs to match the vehicle's side pole impact point to reduce damage to the battery pack during a side collision. The connecting part 20 is provided on the side impact beam 22, so that the expansion beam 3 and the side impact beam 22 can be detachably connected, realizing the integrated design of the expansion beam 3 and the side impact beam 22. In this way, during the processing, the main beam 21 and the base plate 1 can be fixedly connected to form the accommodating cavity 10 first, and then the connecting part 20 can be pre-processed on the side impact beam 22, and then the side impact beam 22 can be fixedly connected to the main beam 21. This greatly facilitates the processing method of the connecting part 20, and can also avoid the connecting part 20 from affecting the strength of the main beam 21, which helps to improve the structural stability of the battery pack casing.

[0050] Furthermore, Figure 4 A schematic diagram of the connection between an expansion beam and a side impact beam is shown, with reference to... Figure 4In some embodiments of this application, the side impact beam 22 includes a first beam 221 and a second beam 222. The first beam 221 and the second beam 222 are detachably connected, and the position of the detachable connection between the first beam 221 and the second beam 222 is adjustable in the length direction of the side impact beam 22.

[0051] Specifically, the first beam 221 and the second beam 222 can be detachably connected through fastener assembly or limiting snap-fit. The detachable connection position between the first beam 221 and the second beam 222 is adjustable along the length of the side impact beam 22, thus making the length of the side impact beam 22 adjustable. Since the side pillar impact points may differ for different vehicle models, in traditional methods, the side impact beam 22 is fixed inside the battery pack housing and cannot be adjusted. When the battery pack is installed in different vehicle models, it is often necessary to redevelop the battery pack housing mold to match the side impact beam 22 to the side pillar impact point positions of different models. This significantly increases development and testing costs and easily leads to material waste. However, in this embodiment, the length of the side impact beam is adjustable. Therefore, in practical applications, the length of the side impact beam 22 can be adjusted according to the side pillar impact point positions of different vehicle models, enabling the side impact beam 22 to meet the requirements of the battery pack in resisting side impacts in different vehicle models. This eliminates the need to redevelop the battery pack housing mold for different vehicle models, significantly saving development costs and reducing material waste.

[0052] Of course, in some embodiments, multiple connection positions for detachable connection with the side impact beam 22 can be provided on the main beam 21. The side impact beam 22 can be moved within the battery pack housing through different connection positions. In practical applications, the position of the side impact beam 22 within the battery pack housing can be adjusted according to the side pillar impact point position of different vehicle models so that the side impact beam 22 can meet the requirements of the battery pack to resist side impacts in different vehicle models.

[0053] Furthermore, refer to Figure 4 In some embodiments of this application, the first beam 221 and the second beam 222 are provided with a group of connecting holes 223. The group of connecting holes 223 is used to pass through fasteners to detachably connect the first beam 221 and the second beam 222. There are at least two groups of connecting holes 223 on the first beam 221 and / or the second beam 222, and at least two groups of connecting holes 223 are spaced apart along the length direction of the first beam 221 and / or the second beam 222.

[0054] Specifically, the first beam 221 and the second beam 222 have the same length direction. The connecting hole group 223 includes multiple connecting holes, which are spaced apart along the height direction of the first beam 221 and the second beam 222. The multiple connecting holes are used to pass through fasteners such as bolts and screws to detachably connect the first beam 221 and the second beam 222. There are at least two connecting hole groups 223 on the first beam 221, or at least two connecting hole groups 223 on the second beam 222, or at least two connecting hole groups 223 on both the first beam 221 and the second beam 222. At least two connecting hole groups 223 are spaced apart along the length direction of the first beam 221 and the second beam 222. All three of these arrangements allow the total length of the first beam 221 and the second beam 222 after connection to change. The total length of the first beam 221 and the second beam 222 after connection is the length of the side impact beam 22. If the number of connecting hole groups 223 on the first beam 221 or the second beam 222 is greater, the side impact beam 22 can have more different lengths. The specific length can be set according to actual needs, and this embodiment does not limit it.

[0055] Alternatively, in some embodiments of this application, the side impact beam 22 includes a first beam and a second beam. The first beam is detachably connected to the main beam 21. The first beam is provided with a slide rail arranged along its length, and the second beam is slidably connected to the slide rail. The second beam slides along the slide rail, allowing the side impact beam 22 to extend and retract along its length, thus making the length of the side impact beam 22 variable and adaptable to the side pillar impact points of different vehicle models. In some embodiments, one of the first beam and the second beam can be a hollow beam, with the other slidably passing through the hollow beam to improve the stability of the sliding process. Furthermore, a connecting structure connected to the main beam 21 can be provided on the second beam, achieving a fixed connection between the second beam and the main beam 21 after the second beam slides into place, ensuring the stability of the side impact beam 22. Of course, a limiting structure such as a protrusion can also be provided on the main beam 21 to limit the sliding range of the second beam.

[0056] Furthermore, refer to Figure 4 In some embodiments of this application, the side impact beam 22 has connecting portions 20 at both ends along its length, and there are two expansion beams 3, which are located at both ends of the side impact beam 22 along its length and are detachably connected to the corresponding connecting portions 20; the side impact beam 22 and the two expansion beams 3 form a cuboid structure. Specifically, there are also two side impact beams 22, which are located on opposite sides of the base plate 1 and are detachably connected to the main beam 21. The cuboid structure formed by the side impact beam 22 and the expansion beams 3 helps to improve the stability of the side impact beam 22 and the expansion beams 3, strengthens the connection reliability, and thus improves the structural stability of the battery pack casing.

[0057] Furthermore, in some embodiments of this application, the side impact beam 22 is provided with a connecting portion 20 at its middle along its length direction, and the battery pack housing also includes a reinforcing beam, which is disposed between the two expansion beams 3 and is detachably connected to the connecting portion 20 at the middle of the side impact beam 22. The reinforcing beam can further divide the accommodating cavity 10 into two independent cavities, thereby further strengthening the constraint on the battery cell 4 and improving the working safety of the battery pack.

[0058] Furthermore, in some embodiments of this application, the bottom surfaces of the expansion beam 3 and / or the side impact beam 22 are adhesively bonded to the base plate 1. The bottom surfaces of the expansion beam 3 and / or the side impact beam 22 are bonded to the base plate 1 using structural adhesive. This structural adhesive has high bonding strength, good aging resistance, fatigue resistance, and corrosion resistance, and can maintain its performance in various harsh environments, thereby helping to maintain a long-term reliable bond between the expansion beam 3 and / or the side impact beam 22 and the base plate 1. It should be noted that in the embodiments of this application, the movement of the expansion beam 3 and the side impact beam 22 within the battery pack housing is achieved during the battery pack development stage. Once the expansion beam 3 and the side impact beam 22 are bonded to the base plate 1, they are no longer moved.

[0059] Figure 5 An exploded view of the structure of a battery pack is shown. Figure 6 A schematic diagram of a battery pack is shown, for reference. Figure 5 and Figure 6 This application also provides a battery pack, which includes a plurality of battery cells 4, a top cover 02, and a battery pack housing 01 as described in any of the preceding embodiments. The plurality of battery cells 4 are housed within the battery pack housing 01, and the top cover 02 is fixedly connected to the battery pack housing 01. Specifically, the battery pack housing 01 has a receiving cavity 10, within which the plurality of battery cells 4 are housed. The top cover 02 is fixedly connected to the battery pack housing 01 to form a closed housing, which protects the battery cells 4 within the receiving cavity 10 and reduces the impact of moisture, dust, and other external environmental factors on the battery cells 4. The use of the battery pack housing 01 described in the preceding embodiments helps to improve the operational safety of the battery pack and control its production costs.

[0060] Furthermore, in some embodiments of this application, the battery pack further includes a high-voltage control module 5 and a conductive busbar 6; the high-voltage control module 5 is located on the outside of the battery pack housing 01 and is detachably connected to the battery pack housing 01; the high-voltage control module 5 is electrically connected to multiple battery cells 4 through the conductive busbar 6. The conductive busbar 6 can be made of copper, aluminum, nickel, etc., and the high-voltage control module 5 is electrically connected to multiple battery cells 4 through the conductive busbar 6 to realize the electrical control of the battery cells 4 by the high-voltage control module 5.

[0061] The high-voltage control module 5 is detachably connected to the battery pack housing 01, which facilitates the inspection, maintenance, or replacement of both the high-voltage control module 5 and the battery pack housing 01. Furthermore, the same battery pack housing 01 can be adapted to different high-voltage control modules 5 based on different cell capacities, chemical systems, or assembly methods. Conversely, the same high-voltage control module 5 can also be adapted to different battery pack housings 01 based on voltage ranges, further enhancing the flexibility of use for both the battery pack housing 01 and the high-voltage control module 5.

[0062] This application also provides a vehicle that includes the battery pack of any of the foregoing embodiments. The vehicle can be a pure electric vehicle or a hybrid vehicle. Using the aforementioned battery pack helps to improve the vehicle's safety performance.

[0063] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery pack housing, characterized in that, It includes a base plate (1), side beam assemblies (2), and expansion beams (3); The side beam assembly (2) is arranged around the periphery of the base plate (1), and the side beam assembly (2) and the base plate (1) together form the battery pack housing; The side beam assembly (2) is provided with at least two connecting parts (20), the at least two connecting parts (20) are spaced apart along the length direction of the side beam assembly (2), and the expansion beam (3) is detachably connected to any one of the at least two connecting parts (20).

2. The battery pack housing according to claim 1, characterized in that, Each of the connecting parts (20) includes a plurality of connecting holes, which are spaced apart along the height direction of the side beam assembly (2); Alternatively, each of the connecting portions (20) may be a limiting groove; Alternatively, each of the connecting portions (20) may be a limiting protrusion.

3. The battery pack housing according to claim 1, characterized in that, The side beam assembly (2) includes a main beam (21) and a side impact beam (22), wherein the main beam (21) is arranged around the periphery of the bottom plate (1) and fixedly connected to the bottom plate (1), and a cavity is formed between the main beam (21) and the bottom plate (1); The battery pack housing has a side impact point, and the anti-side impact beam (22) is located at the side impact point and is detachably connected to the main beam (21) on the side near the accommodating cavity. The at least two connecting parts (20) are provided on the anti-side collision beam (22).

4. The battery pack housing according to claim 3, characterized in that, The side impact beam (22) includes a first beam (221) and a second beam (222). The first beam (221) and the second beam (222) are detachably connected, and the position of the detachable connection between the first beam (221) and the second beam (222) is adjustable in the length direction of the side impact beam (22).

5. The battery pack housing according to claim 4, characterized in that, The first beam (221) and the second beam (222) are provided with a set of connecting holes (223), which are used to insert fasteners to detachably connect the first beam (221) and the second beam (222); The connecting hole group (223) on the first beam (221) and / or the second beam (222) is at least two, and at least two connecting hole groups (223) are spaced apart along the length direction of the first beam (221) and / or the second beam (222).

6. The battery pack housing according to claim 3, characterized in that, The side impact prevention beam (22) includes a first beam and a second beam. The first beam is detachably connected to the main beam (21). The first beam is provided with a slide rail arranged along its length direction, and the second beam is slidably connected to the slide rail.

7. The battery pack housing according to claim 3, characterized in that, The anti-side collision beam (22) has the connecting part (20) at both ends along its length direction; The expansion beam (3) consists of two beams, which are located at both ends of the anti-side collision beam (22) along its length and are detachably connected to the corresponding connecting part (20). The anti-side collision beam (22) and the two expansion beams (3) form a cubic structure.

8. The battery pack housing according to claim 7, characterized in that, The anti-side collision beam (22) is also provided with the connecting part (20) at the middle of its length direction; The battery pack housing also includes a reinforcing beam, which is located between the two expansion beams (3) and is detachably connected to the connecting part (20) in the middle of the anti-side impact beam (22).

9. The battery pack housing according to any one of claims 3 to 8, characterized in that, The bottom surface of the expansion beam (3) and / or the anti-side impact beam (22) is glued to the base plate (1).

10. A battery pack, characterized in that, It includes a plurality of battery cells (4), a top cover (02) and a battery pack housing (01) as described in any one of claims 1 to 9, wherein the plurality of battery cells (4) are housed within the battery pack housing, and the top cover (02) is fixedly connected to the battery pack housing (01).

11. The battery pack according to claim 10, characterized in that, It also includes a high-voltage control module (5) and a busbar (6); The high-voltage control module (5) is located on the outside of the battery pack housing (01) and is detachably connected to the battery pack housing (01); the high-voltage control module (5) is electrically connected to the plurality of battery cells (4) through the conductive busbar (6).

12. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 10 to 11.

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