A battery pack housing, a battery pack, and a vehicle

Abstract

The embodiment of the application provides a battery pack shell, a battery pack and a vehicle, the battery pack shell comprises a lower shell and an upper shell, the lower shell is provided with a first connecting part for connecting with a vehicle body frame, the upper shell is provided with a second connecting part for connecting with the vehicle body frame, and the upper shell is provided with a vehicle body sealing structure at a connecting position of the vehicle body frame. When the upper shell is used as a vehicle body floor, the vehicle body sealing structure can prevent external impurities from entering the passenger compartment through the gap between the upper shell and the vehicle body frame, improve the sealing performance between the upper shell and the vehicle body frame, make the connection between the battery pack and the vehicle body frame more reliable, and ensure that the sealing position of the battery pack and the vehicle body frame is not affected, the sealing performance is maintained, the safety of the passenger compartment is ensured, and the technical problem that the safety hidden danger of the battery pack and the vehicle body integration is large in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of battery design technology, and more specifically, to a battery pack housing, a battery pack, and a vehicle. Background Technology

[0002] In recent years, with the rapid development of the electric vehicle market and the continuous advancement of battery technology, vehicle integration and lightweight design have become key focuses for major automakers and technology companies. As a core component of electric vehicles, the integration of the battery with the vehicle body not only optimizes the overall vehicle layout but also effectively reduces production costs and improves production efficiency. However, integrating the battery pack with the vehicle body means the battery pack directly serves as the vehicle floor. In the event of a collision or thermal runaway of the battery pack, harmful substances such as water and smoke can easily enter the passenger compartment, posing a safety threat to the occupants.

[0003] There is currently no effective solution to the aforementioned technical problems. Utility Model Content

[0004] This application provides a battery pack housing, a battery pack, and a vehicle, aiming to improve the problem of significant safety hazards after the battery pack is integrated with the vehicle body in the prior art.

[0005] According to one aspect of the present application, a battery pack housing is provided, including a lower housing and an upper housing. The lower housing is provided with a first connecting portion for connecting with a vehicle body frame, and the upper housing is provided with a second connecting portion for connecting with a vehicle body frame. A vehicle body sealing structure is provided at the connection between the upper housing and the vehicle body frame.

[0006] The embodiments of this application achieve the following technical effects: When the upper shell is used as the vehicle floor, both the lower shell and the upper shell are connected to the vehicle frame, which can improve the connection stability between the battery pack shell and the vehicle frame. The vehicle sealing structure can prevent external impurities from entering the passenger compartment through the gap between the upper shell and the vehicle frame. Setting the vehicle sealing structure at the connection between the upper shell and the vehicle frame can improve the sealing performance between the upper shell and the vehicle frame, making the connection between the battery pack and the vehicle frame more reliable. In extreme cases such as vehicle collision or deformation, or thermal runaway of the battery pack, it ensures that the sealing between the battery pack and the vehicle frame is not affected, maintains good sealing performance, and ensures the safety of the passenger compartment. This solves the technical problem of significant safety hazards after the battery pack is integrated with the vehicle body in the prior art.

[0007] Furthermore, the vehicle body sealing structure extends circumferentially along the upper housing.

[0008] The above-mentioned optional embodiments of this application achieve the following technical effects: By setting the vehicle body sealing structure along the circumference of the upper housing, it can ensure uniform sealing of the contact surface between the entire upper housing and the vehicle body sealing structure, avoid local poor sealing leading to a decrease in sealing performance, improve the integrity and reliability of the vehicle body sealing structure, and further enhance the sealing performance of the battery pack.

[0009] Furthermore, the vehicle body sealing structure is an annular sealing structure.

[0010] The above-mentioned optional embodiments of this application achieve the following technical effects: the annular sealing structure can form a continuous sealing ring, effectively isolating external impurities and improving the sealing effect.

[0011] Furthermore, a battery sealing structure is provided at the connection between the lower housing and the upper housing.

[0012] The above-mentioned optional embodiments of this application achieve the following technical effects: by setting a battery sealing structure on the contact surface between the lower housing and the upper housing, a sealing barrier can be formed inside the battery pack, preventing the internal battery cells from being affected by external impurities, improving the internal sealing performance of the battery pack, extending the battery's service life, and ensuring the safe operation of the battery pack under various environmental conditions.

[0013] Furthermore, the battery sealing structure extends circumferentially along the lower housing.

[0014] The above-mentioned optional embodiments of this application achieve the following technical effects: the battery sealing structure extends circumferentially along the lower housing, which can ensure the complete sealing of the battery pack interior, prevent impurities from penetrating from multiple directions, and improve the sealing performance of the battery pack interior.

[0015] Furthermore, the battery sealing structure is a ring-shaped sealing structure.

[0016] The above-mentioned optional embodiments of this application achieve the following technical effects: by utilizing the sealing characteristics of the annular sealing structure, a continuous sealing ring can be formed, effectively isolating the exchange of impurities between the inside of the battery pack and the external environment, thereby improving the sealing effect.

[0017] Furthermore, along the radial direction of the battery pack housing, the connection between the lower housing and the upper housing is located close to the radial centerline of the battery pack housing, while the connection between the upper housing and the vehicle frame is located away from the radial centerline of the battery pack housing.

[0018] The above-mentioned optional embodiments of this application achieve the following technical effects: the connection point between the lower housing and the upper housing is set close to the center of the battery pack housing, which can optimize the structural stability of the battery pack, effectively disperse and absorb internal stress during transportation or use, and reduce the risk of damage to internal parts of the battery pack due to vibration and bumps. The connection point between the upper housing and the vehicle frame is set far away from the center of the battery pack housing, which makes the connection between the upper housing and the vehicle frame less susceptible to direct impact when the vehicle encounters accidents such as collisions, thereby maintaining better sealing performance. This helps to effectively isolate harmful substances generated by the battery pack in extreme situations such as collisions or battery thermal runaway, protect the passenger compartment from harm, and improve the overall vehicle safety. At the same time, the connection point between the upper housing and the vehicle frame is set far away from the center of the battery pack housing, which also ensures that there is sufficient external space for the connection between the upper housing and the vehicle frame, which is convenient for installation and maintenance.

[0019] Furthermore, the outer perimeter of the upper shell is larger than that of the lower shell, and the connection between the upper shell and the vehicle frame is located near the outer edge of the upper shell.

[0020] The above-mentioned optional embodiments of this application achieve the following technical effects: the outer periphery of the upper shell is larger than that of the lower shell, which can provide an additional coverage area for the upper shell, enhance the stability of the connection between the upper shell and the vehicle frame, and also provide an additional protective layer for the inside of the battery pack, thereby improving the structural strength and sealing performance of the battery pack.

[0021] Furthermore, at least one of the first connecting portion and the second connecting portion is a bolt through hole.

[0022] The above-mentioned optional embodiments of this application achieve the following technical effects: the bolt through hole can serve as a channel for fasteners, and the lower housing, upper housing and body frame are connected by fastening bolts and other fasteners, which improves the stability and sealing of the connection, simplifies the assembly process of the battery pack housing and the body frame, and reduces production costs.

[0023] According to another aspect of the embodiments of this application, a battery pack is provided, the battery pack having a battery pack housing, the battery pack housing being the battery pack housing described above.

[0024] The embodiments of this application achieve the following technical effects: by optimizing the structure and sealing design of the battery pack casing, the sealing performance and safety performance of the battery pack can be improved, and the service life of the battery pack can be extended.

[0025] According to another aspect of the embodiments of this application, a vehicle is provided, the vehicle having a battery pack, the battery pack being the battery pack described above.

[0026] The embodiments of this application achieve the following technical effects: through the structure and sealing design of the battery pack, the overall performance of the vehicle can be improved, such as waterproof performance, structural strength and space utilization, significantly improving the driving safety and reliability of the vehicle.

[0027] Furthermore, the vehicle also includes a body frame, and when the battery pack housing is connected to the body frame, the upper housing forms the vehicle's body floor.

[0028] The above-mentioned optional embodiments of this application achieve the following technical effects: after the upper shell is connected to the vehicle frame, it can take on the function of the vehicle floor, saving the material and production cost of the vehicle floor, optimizing the structural layout of the vehicle, improving space utilization, and improving the vehicle's economy and performance. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the connection between the battery pack housing and the vehicle frame according to an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the structure of a battery pack housing provided in one embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the structure of a vehicle frame provided in one embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Lower housing; 121. Lower housing bushing;

[0035] 2. Upper shell;

[0036] 101. First sealing surface; 102. Second sealing surface; 103. Battery rivet nut;

[0037] 3. Body frame; 301. Body sealing area; 302. Body welding nuts;

[0038] 4. Battery sealing structure;

[0039] 5. Vehicle body sealing structure;

[0040] 6. Battery fastening bolts;

[0041] 7. Body fastening bolts;

[0042] 8. Body sealing bolts. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0047] In traditional electric vehicles, the battery is typically encapsulated in a separate battery box, with dedicated upper and lower battery housings connected by a sealing strip to form a closed battery cavity, protecting the internal battery from external environmental factors. The vehicle body has a separate floor structure to support the battery box and other vehicle components. While this separate structure meets the basic protection requirements of the battery, it has limitations in terms of integration and cost control. With the evolution of battery technology and vehicle design, an emerging design trend is to integrate the battery directly into the vehicle floor, eliminating the traditional separate battery box to save Z-axis (i.e., vehicle height) space and reduce vehicle costs. However, this design brings new technical challenges: how to achieve an effective seal between the battery pack and the vehicle body without a separate floor, especially during driving through flooded areas or collisions, ensuring the isolation between the battery pack and the passenger compartment, preventing water, smoke, and other harmful substances from entering the passenger compartment, and ensuring the safety of passengers.

[0048] Currently, some battery-vehicle integrated sealing solutions on the market, while solving the initial connection and sealing problems between the battery pack and the vehicle body to some extent, do not form a complete and independent battery sealing system when the battery is installed on the vehicle body. The battery must first be assembled into a semi-finished product without a top cover, making it impossible to perform a complete airtightness test. This results in additional airtightness testing of the entire system after the battery is installed on the vehicle body, leading to a longer production cycle and a certain probability of rework. This necessitates setting up a separate rework area on the production line, significantly altering existing vehicle production lines and increasing production cycle time and costs. Furthermore, these solutions often neglect whether the sealing structure can remain effective under extreme conditions, such as thermal runaway of the battery pack or a severe impact to the vehicle, thus failing to guarantee the safety of the passenger compartment.

[0049] Therefore, while the integrated design of the battery and the vehicle body can bring advantages in terms of cost and space, the following key issues still need to be addressed in practical applications: First, how to ensure that the battery pack still has an independent and reliable sealing structure when integrated with the vehicle body; second, how to maintain good sealing performance in the sealed area where the battery pack and the vehicle body are connected, even in extreme cases such as vehicle collision or thermal runaway of the battery pack, to ensure the safety of the passenger compartment.

[0050] In view of the shortcomings of the existing technology, this technical field needs a new sealed structure for battery and vehicle body integration that can not only meet the requirements of efficient integration of battery pack and vehicle body, but also ensure the sealing performance between battery and vehicle body under various operating conditions, especially the sealing stability under vehicle wading and collision conditions, so as to improve the safety of electric vehicles and user experience.

[0051] Combination Figures 1 to 3As shown, according to a specific embodiment of this application, a battery pack housing is provided.

[0052] Specifically, the battery pack housing includes a lower housing 1 and an upper housing 2. The lower housing 1 is provided with a first connecting part for connecting with the vehicle frame 3, and the upper housing 2 is provided with a second connecting part for connecting with the vehicle frame 3. A vehicle sealing structure 5 is provided at the connection between the upper housing 2 and the vehicle frame 3.

[0053] The embodiments of this application achieve the following technical effects: When the upper shell 2 is used as the vehicle floor, both the lower shell 1 and the upper shell 2 are connected to the vehicle frame 3, which can improve the connection stability between the battery pack shell and the vehicle frame 3. The vehicle sealing structure 5 can prevent external impurities from entering the passenger compartment through the gap between the upper shell 2 and the vehicle frame 3. Setting the vehicle sealing structure 5 at the connection between the upper shell 2 and the vehicle frame 3 can improve the sealing performance between the upper shell 2 and the vehicle frame 3, making the connection between the battery pack and the vehicle frame 3 more reliable. In extreme cases such as vehicle collision or deformation, or thermal runaway of the battery pack, it ensures that the sealing between the battery pack and the vehicle frame 3 is not affected, maintains good sealing performance, and ensures the safety of the passenger compartment. This solves the technical problem of significant safety hazards after the battery pack is integrated with the vehicle body in the prior art.

[0054] Specifically, the vehicle body sealing structure 5 extends circumferentially along the upper housing 2.

[0055] The above-mentioned optional embodiments of this application achieve the following technical effects: the body sealing structure 5 is arranged along the circumference of the upper housing 2, which can ensure uniform sealing of the entire contact surface between the upper housing 2 and the body sealing structure 5, avoid local poor sealing leading to a decrease in sealing performance, improve the integrity and reliability of the body sealing structure 5, and further enhance the sealing performance of the battery pack.

[0056] Preferably, the vehicle body sealing structure 5 is an annular sealing structure.

[0057] The above-mentioned optional embodiments of this application achieve the following technical effects: the annular sealing structure can form a continuous sealing ring, effectively isolating external impurities and improving the sealing effect.

[0058] Depending on actual needs, the body sealing structure 5 can be a fixed-size annular sealing structure, the size of which is customized according to the dimensions of the body frame 3 and the battery pack housing. Alternatively, the body sealing structure 5 can be an adjustable annular sealing structure, which can be adjusted to a suitable size according to the specific dimensions of the body frame 3 and the battery pack housing. Or, the body sealing structure 5 can be a modular annular sealing structure, which is an annular structure composed of multiple independent modules, each of which is an independent sealing structure that can be replaced or upgraded as needed without replacing the entire sealing structure.

[0059] Furthermore, a battery sealing structure 4 is provided at the connection between the lower housing 1 and the upper housing 2.

[0060] The above-mentioned optional embodiments of this application achieve the following technical effects: by providing a battery sealing structure 4 at the contact surface between the lower housing 1 and the upper housing 2, a sealing barrier can be formed inside the battery pack, preventing the internal battery cells from being affected by external impurities, improving the internal sealing performance of the battery pack, extending the battery's service life, and ensuring the safe operation of the battery pack under various environmental conditions.

[0061] Specifically, the battery sealing structure 4 extends circumferentially along the lower housing 1.

[0062] The above-mentioned optional embodiments of this application achieve the following technical effects: the battery sealing structure 4 is provided extending circumferentially along the lower housing 1, which can ensure the complete sealing of the inside of the battery pack, prevent impurities from penetrating from multiple directions, and improve the sealing performance inside the battery pack.

[0063] Preferably, the battery sealing structure 4 is an annular sealing structure.

[0064] The above-mentioned optional embodiments of this application achieve the following technical effects: by utilizing the sealing characteristics of the annular sealing structure, a continuous sealing ring can be formed, effectively isolating the exchange of impurities between the inside of the battery pack and the external environment, thereby improving the sealing effect.

[0065] Depending on actual needs, the battery sealing structure 4 can be a fixed-size annular sealing structure, the size of which is customized according to the battery pack housing. Alternatively, the battery sealing structure 4 can be an adjustable annular sealing structure, which can be adjusted to a suitable size according to the specific battery pack housing size. Or, the battery sealing structure 4 can be a modular annular sealing structure, which is an annular structure composed of multiple independent modules. Each module is an independent sealing structure, which can be replaced or upgraded according to actual needs without replacing the entire sealing structure.

[0066] Furthermore, along the radial direction of the battery pack housing, the connection between the lower housing 1 and the upper housing 2 is located close to the radial centerline of the battery pack housing, while the connection between the upper housing 2 and the vehicle frame 3 is located away from the radial centerline of the battery pack housing.

[0067] The above-mentioned optional embodiments of this application achieve the following technical effects: the connection point between the lower housing 1 and the upper housing 2 is set close to the center of the battery pack housing, which can optimize the structural stability inside the battery pack, effectively disperse and absorb internal stress during transportation or use, and reduce the risk of damage to internal parts of the battery pack due to vibration and bumps. The connection point between the upper housing 2 and the vehicle frame 3 is set far away from the center of the battery pack housing, which makes the connection between the upper housing 2 and the vehicle frame 3 less susceptible to direct impact when the vehicle encounters accidents such as collisions, thereby maintaining better sealing performance. This helps to effectively isolate harmful substances generated by the battery pack in extreme situations such as collisions or battery thermal runaway, protect the passenger compartment from harm, and improve the overall vehicle safety. At the same time, the connection point between the upper housing 2 and the vehicle frame 3 being far away from the center of the battery pack housing can also ensure that there is sufficient external space for the connection between the upper housing 2 and the vehicle frame 3, which is convenient for installation and maintenance.

[0068] Preferably, the outer perimeter of the upper housing 2 is larger than that of the lower housing 1, and the connection between the upper housing 2 and the vehicle frame 3 is located near the outer edge of the upper housing 2.

[0069] The above optional embodiments of this application achieve the following technical effects: the outer periphery of the upper housing 2 is larger than the outer periphery of the lower housing 1, which can provide an additional coverage area for the upper housing 2, enhance the stability of the connection between the upper housing 2 and the vehicle frame 3, and also provide an additional protective layer for the inside of the battery pack, thereby improving the structural strength and sealing performance of the battery pack.

[0070] Preferably, at least one of the first connecting portion and the second connecting portion is a bolt through hole.

[0071] The above-mentioned optional embodiments of this application achieve the following technical effects: the bolt through hole can serve as a channel for fasteners, and the lower housing 1, upper housing 2 and vehicle frame 3 are connected by fastening bolts and other fasteners, which improves the stability and sealing of the connection, simplifies the assembly process of the battery pack housing and the vehicle frame 3, and reduces production costs.

[0072] It should be noted that, in the embodiments of this application, the second connecting part and the first connecting part can be configured as multiple, such as multiple bolt through holes evenly arranged along the circumference of the battery pack housing, so that the vehicle frame 3 can be bolted and nut connected to the upper housing 2 and the lower housing 1 respectively. The vehicle sealing structure 5 located at the connection between the upper housing 2 and the vehicle frame 3 can be understood as follows: when the upper housing 2 and the vehicle frame 3 are connected by fasteners (such as bolts, screws, etc.), the fasteners pass through the upper housing 2, the vehicle sealing structure 5 and the vehicle frame 3 in sequence, so that while connecting the upper housing 2 and the vehicle frame 3, the vehicle sealing structure 5 is pressed between the upper housing 2 and the vehicle frame 3.

[0073] In one optional embodiment of this application, high-strength aluminum alloy or stainless steel rivets can be used to connect the vehicle frame 3 to the upper housing 2 and the lower housing 1, and O-rings, gaskets, and other vehicle body sealing structures 5 can be provided at the connection between the upper housing 2 and the vehicle frame 3. Alternatively, a quick-release structure can be used to connect the vehicle frame 3 to the upper housing 2 and the lower housing 1. The quick-release structure allows for rapid disassembly and installation, which is beneficial for frequent maintenance or battery pack replacement.

[0074] According to another aspect of the embodiments of this application, a battery pack is provided, the battery pack having a battery pack housing, the battery pack housing being the battery pack housing in the above embodiments.

[0075] The embodiments of this application achieve the following technical effects: by optimizing the structure and sealing design of the battery pack casing, the sealing performance and safety performance of the battery pack can be improved, and the service life of the battery pack can be extended.

[0076] According to another aspect of the embodiments of this application, a vehicle is provided, the vehicle having a battery pack, the battery pack being the battery pack in the above embodiments.

[0077] The embodiments of this application achieve the following technical effects: through the structure and sealing design of the battery pack, the overall performance of the vehicle can be improved, such as waterproof performance, structural strength and space utilization, significantly improving the driving safety and reliability of the vehicle.

[0078] Furthermore, the vehicle also includes a body frame 3, and when the battery pack housing is connected to the body frame 3, the upper housing 2 forms the vehicle's body floor.

[0079] The above-mentioned optional embodiments of this application achieve the following technical effects: after the upper shell 2 is connected to the vehicle frame 3, it can take on the function of the vehicle floor, save the material and production cost of the vehicle floor, optimize the structural layout of the vehicle, improve the space utilization rate, and improve the economy and performance of the vehicle.

[0080] This application also provides a preferred embodiment of a vehicle, which includes a vehicle body frame 3 and a battery pack. The vehicle body frame 3 mainly includes transverse and longitudinal beams. The vehicle body frame 3 is hollow in the middle and does not have an independent complete floor. After the battery pack shell is connected to the vehicle body frame 3, part of the battery pack shell forms the vehicle floor.

[0081] The battery pack includes a battery pack housing and components such as battery modules and a battery management system housed within the housing. The battery pack housing comprises a lower housing 1 and an upper housing 2 arranged adjacent to each other along the vehicle's height. The lower housing 1 and upper housing 2, when connected, form a space for accommodating the battery modules, battery management system, and other components. By arranging two sealing surfaces on the lower housing 1, both the internal and external sealing of the battery and the sealing of the vehicle body are achieved. This embodiment can reduce overall vehicle costs. By eliminating the vehicle floor, approximately 10mm of space is freed up in the Z-axis direction, increasing battery capacity through improved space utilization. Furthermore, by adding bolts to the sealing structure, the sealing performance between the battery pack and the vehicle body is improved, enhancing the safety of the passenger compartment.

[0082] The battery pack housing also includes a lower housing bushing 121. The upper housing 2 has two annular sealing surfaces, with the inner surface being the first sealing surface 101 between the lower housing 1 and the upper housing 2, and the outer surface being the second sealing surface 102 between the upper housing 2 and the vehicle frame 3. A battery annular sealing strip (i.e., the aforementioned battery sealing structure 4) is provided between the lower housing 1 and the upper housing 2. Several battery rivet nuts 103 are provided on the lower housing 1 at intervals, and the upper housing 2 has corresponding bolt through holes (i.e., the aforementioned second connecting part). The battery annular sealing strip between the upper housing 2 and the lower housing 1 is pressed together by the battery fastening bolts 6, and the height is limited by the battery rivet nuts 103. The compression rate of the battery annular sealing strip is controlled within a certain range to achieve sealing inside the battery. A body annular sealing strip (i.e., the aforementioned body sealing structure 5) is provided between the upper housing 2 and the body frame 3, which matches the second sealing surface 102 of the upper housing 2. The lower housing 1 is fixed to the body frame 3 by body fastening bolts 7, body welding nuts 302, and body frame 3, which compress the body annular sealing strip to a suitable compression ratio to achieve the sealing of the battery and the body. Then, the second sealing surface 102 and the body sealing area 301 are fastened together by body sealing bolts 8 to enhance the sealing safety of the battery pack and the body.

[0083] In this embodiment, the internal sealing of the battery is achieved by a combination of the lower housing 1, the upper housing 2, the battery rivet nut 103, the battery annular sealing strip, and the battery fastening bolt 6. The sealing between the battery and the vehicle body is achieved by a combination of the lower housing 1, the vehicle body fastening bolt 7, the vehicle body sealing bolt 8, and the vehicle body annular sealing strip. The outer circumference of the upper housing 2 is larger than that of the lower housing 1, mainly to facilitate the fastening connection between the upper housing 2 and the vehicle body's transverse and longitudinal beams via the vehicle body sealing bolt 8.

[0084] Among them, the battery rivet nut 103 can be replaced by machining threads on the lower housing 1, and the body fastening bolt 7 can be replaced by other welding, riveting or other methods for fixing.

[0085] The vehicle in this embodiment can achieve the following beneficial effects:

[0086] 1) The battery pack has an independent upper casing, and the vehicle body does not have an independent complete floor, which can save about 10mm of the Z-axis space of the whole vehicle and reduce the cost of the vehicle body.

[0087] 2) The sealing structure of the battery and the body is arranged in the connection area between the body and the upper shell 2. The battery has an independent sealing structure inside. The battery and the body are protected from water immersion inside the vehicle by a ring sealing strip. There is no need to perform battery pack airtightness testing on the vehicle production line, saving the production cycle of the whole vehicle.

[0088] 3) It requires minimal modification to the vehicle production line (basically no modification is needed), has no impact on the production cycle of the vehicle production line, and can be seamlessly switched, which helps to improve production efficiency and reduce production line modification costs.

[0089] 4) In the event of thermal runaway of the battery pack, the passenger compartment remains sealed to prevent smoke and other contaminants from entering the passenger compartment and to avoid the risk of smoke inhalation or even fire to the occupants.

[0090] In this application, the electrode assembly is a combination of the current collector and the active material of the battery.

[0091] In this application, "multiple" refers to two or more.

[0092] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0093] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0094] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0095] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

Claims

1. A battery pack housing, characterized in that, It includes a lower housing (1) and an upper housing (2). The lower housing (1) is provided with a first connecting part for connecting with the vehicle body frame (3), and the upper housing (2) is provided with a second connecting part for connecting with the vehicle body frame (3). A vehicle body sealing structure (5) is provided at the connection between the upper housing (2) and the vehicle body frame (3).

2. The battery pack housing according to claim 1, characterized in that, The vehicle body sealing structure (5) extends circumferentially along the upper housing (2).

3. The battery pack housing according to claim 2, characterized in that, The vehicle body sealing structure (5) is an annular sealing structure.

4. The battery pack housing according to any one of claims 1-3, characterized in that, A battery sealing structure (4) is provided at the connection between the lower housing (1) and the upper housing (2).

5. The battery pack housing according to claim 4, characterized in that, The battery sealing structure (4) extends circumferentially along the lower housing (1).

6. The battery pack housing according to claim 5, characterized in that, The battery sealing structure (4) is an annular sealing structure.

7. The battery pack housing according to any one of claims 1-3, characterized in that, Along the radial direction of the battery pack housing, the connection between the lower housing (1) and the upper housing (2) is located close to the radial centerline of the battery pack housing, while the connection between the upper housing (2) and the vehicle frame (3) is located away from the radial centerline of the battery pack housing.

8. The battery pack housing according to claim 7, characterized in that, The outer perimeter of the upper housing (2) is larger than that of the lower housing (1), and the connection between the upper housing (2) and the vehicle frame (3) is located near the outer edge of the upper housing (2).

9. The battery pack housing according to any one of claims 1-3, characterized in that, At least one of the first connecting part and the second connecting part is a bolt through hole.

10. A battery pack, characterized in that, The battery pack has a battery pack housing, which is the battery pack housing according to any one of claims 1-9.

11. A vehicle, characterized in that, The vehicle has a battery pack, which is the battery pack according to claim 10.

12. The vehicle according to claim 11, characterized in that, The vehicle also includes the body frame (3), and when the battery pack housing is connected to the body frame (3), the upper housing (2) forms the vehicle's body floor.

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