Battery pack and electric vehicle

Abstract

The utility model provides a battery pack and an electric vehicle. The battery pack comprises a box body, the box body comprises a box cover and a frame part, and a containing cavity is defined by the box cover and the frame part; the frame piece comprises a bottom protection plate and a frame piece, the box cover is arranged at the top end of the frame piece, and the bottom protection plate is located at the bottom end of the frame piece. The battery module is positioned in the accommodating cavity; the box cover is provided with a first protruding part and a second protruding part, and the first protruding part and the second protruding part extend in the direction away from the bottom protection plate and are located at different positions of the box cover respectively. The first protruding part is provided with a first gas flow channel, the second protruding part is provided with a second gas flow channel, and the first gas flow channel and the second gas flow channel communicate with the containing cavity and conduct drainage on gas in the containing cavity. The utility model solves the problems of complex structure, higher cost and the like of the battery pack of the small-sized electric vehicle.

Description

Technical Field

[0001] This utility model relates to a battery pack and an electric vehicle, belonging to the field of new energy battery technology. Background Technology

[0002] With the rapid growth of the electric vehicle (EV) market, automakers and new energy battery companies are seeking more environmentally friendly battery cooling methods. In particular, low-power electric vehicles (such as low-speed electric vehicles and urban microcars) have relatively small motor power and battery capacity, resulting in low overall vehicle power consumption and relatively low battery heat generation. Their main application scenarios are short-distance travel within cities, which typically do not require long-distance high-speed driving.

[0003] In the process of conceiving and implementing this utility model, the applicant discovered at least the following problems: if a traditional cooling system is used, it will increase the complexity of the vehicle and the manufacturing cost.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] This utility model provides a battery pack and an electric vehicle, solving the problems of complex structure and high cost of battery packs for small electric vehicles.

[0006] This utility model provides a battery pack, comprising:

[0007] The enclosure includes a lid and a frame, with the lid and frame forming a receiving cavity;

[0008] The frame components include a bottom protective plate and side frame components. The box cover is located at the top of the side frame components, and the bottom protective plate is located at the bottom of the side frame components.

[0009] The battery module is located inside the housing cavity;

[0010] The lid has a first protrusion and a second protrusion, both of which extend in a direction away from the bottom guard plate and are located at different positions on the lid.

[0011] The first protrusion has a first gas flow channel, and the second protrusion has a second gas flow channel. The first gas flow channel and the second gas flow channel are respectively connected to the receiving cavity and guide the gas in the receiving cavity.

[0012] The beneficial effects of this utility model are: the design of the first and second protrusions on the cover allows the battery pack to use natural cooling, which is simple to design and does not require additional coolant pipes and pumps, making the overall battery pack design more concise and improving the energy density of the battery pack; at the same time, the natural cooling method requires almost no daily maintenance, which is convenient for users of low-power electric vehicles, reduces the later maintenance costs, and can also improve the vehicle's range.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] In some alternative implementations, the bottom guard plate is a stamped part.

[0015] It should be noted that stamping can create complex geometries and reinforcing ribs on the bottom guard plate, thereby improving its structural strength and rigidity. Stamping also allows for a reduction in material usage without compromising strength, thus lowering the weight of the bottom guard plate.

[0016] In some alternative embodiments, the first protrusion is located in the middle of the lid;

[0017] There are multiple second protrusions, which are located around the box cover. The second protrusions extend toward the first protrusion so that the second gas flow channel faces the first gas flow channel.

[0018] It should be noted that the design of the first and second protrusions forms gas flow channels, promoting airflow inside the battery pack. This natural convection airflow effectively removes heat from inside the battery pack, thereby improving heat dissipation efficiency.

[0019] In some alternative embodiments, the side of the first protrusion facing the second protrusion has an arcuate segment.

[0020] It should be noted that the arc-shaped section design can reduce airflow resistance, making the gas flow smoother. The arc-shaped section helps to distribute the airflow evenly, thereby dissipating heat more evenly, avoiding local overheating, and improving the overall performance and safety of the battery pack.

[0021] In some alternative embodiments, the housing also includes a support beam assembly disposed on the bottom protective plate, and the battery module is disposed on the support beam assembly;

[0022] The support beam assembly includes a first support beam and a second support beam;

[0023] The first support beam is installed on the bottom protective plate along the first direction, and the second support beam is installed on the bottom protective plate along the second direction.

[0024] There is an angle between the first direction and the second direction.

[0025] It should be noted that by setting the first and second support beams in different directions, a multi-directional support structure is formed. The multi-directional support beam design can provide more installation and fixing points, increase the flexibility and convenience of battery module installation, effectively improve the structural strength and rigidity of the entire battery pack, and enhance its load-bearing capacity.

[0026] In some alternative embodiments, the frame members are made of rolled steel and have a hollow structure; and / or,

[0027] Both the first and second support beams are made of rolled steel and are hollow structures.

[0028] It should be noted that the hollow structure significantly reduces the weight of the components while maintaining the necessary strength, thereby reducing the weight of the battery pack, reducing the amount of materials used, and thus lowering production costs. It also meets the requirements of environmental protection and sustainable development.

[0029] In some optional embodiments, there are multiple first support beams and multiple second support beams, and the multiple first support beams are spaced apart along the second direction;

[0030] Multiple second support beams are spaced apart along the first direction and are all located between the frame member and the first support beam facing the inner wall of the frame member.

[0031] It should be noted that the arrangement of multiple first and second support beams in different directions effectively disperses and bears forces from various directions, improving the overall structural stability and resistance to deformation. Furthermore, their evenly spaced arrangement allows for a more uniform distribution of load across the entire structure, reducing localized stress concentration and extending the battery pack's lifespan.

[0032] In some alternative embodiments, the bottom guard plate has at least two third protrusions that protrude toward the box cover and are located between two adjacent first support beams;

[0033] The third protrusion has a first groove and a second groove, both of which are connected to the receiving cavity. The first groove is located in the middle of the third protrusion, and the second groove is located at the edge of the third protrusion.

[0034] It should be noted that the design of the third protrusion increases the structural strength and rigidity of the bottom protective plate, helping to withstand the pressure from the battery module and the external environment. The groove design promotes airflow and enhances heat dissipation. The different positions of the first and second grooves help optimize airflow paths in different areas, improving the thermal management performance of the battery pack.

[0035] In some alternative implementations, the battery pack includes a seal disposed between the cover and the frame.

[0036] It should be noted that the seals effectively prevent dust, moisture and other external contaminants from entering the battery pack. The battery pack can achieve good airtightness, prevent internal gas leakage, maintain a stable internal environment, and protect the safety and performance of the battery modules and other internal components.

[0037] In addition, this utility model also provides an electric vehicle, including the aforementioned battery pack.

[0038] The present invention provides a battery pack and an electric vehicle. The electric vehicle includes a battery pack; the battery pack includes a housing, including a cover and a frame, which together form a receiving cavity; the frame includes a bottom guard plate and a side frame, with the cover located at the top of the side frame and the bottom guard plate at the bottom of the side frame; a battery module is located within the receiving cavity; the cover has a first protrusion and a second protrusion, both extending away from the bottom guard plate and located at different positions on the cover; the first protrusion has a first gas flow channel, and the second protrusion has a second gas flow channel, which are respectively connected to the receiving cavity and guide the gas within the receiving cavity.

[0039] The design of the first and second protrusions on the battery pack cover allows for natural cooling, which is simple and eliminates the need for additional coolant lines and pumps. This results in a more streamlined battery pack design and increased energy density. Furthermore, natural cooling requires almost no routine maintenance, which is convenient for users of low-power electric vehicles, reduces maintenance costs, and improves the vehicle's range. Attached Figure Description

[0040] The above and other objects, features, and advantages of embodiments of the present invention will become more readily understood from the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the present invention will be described by way of example and non-limitation, wherein:

[0041] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of the present utility model;

[0042] Figure 2 This is an exploded view of the battery pack according to an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the structure of the battery pack cover according to an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of the structure of the frame component in the battery pack according to an embodiment of the present utility model;

[0045] Figure 5This is a partially exploded view of the frame component in the battery pack according to an embodiment of the present invention.

[0046] Figure label:

[0047] 200-battery pack;

[0048] 100 - Box body; 110 - Box lid; 111 - First protrusion; 112 - Second protrusion;

[0049] 120 - Frame component; 121 - Bottom guard plate; 1211 - Third protrusion; 12111 - First groove; 12112 - Second groove; 122 - Side frame component;

[0050] 130 - Support beam assembly; 131 - First support beam; 132 - Second support beam;

[0051] 140 - Seal; 150 - Bracket; 160 - Lifting lug. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. In the absence of conflict, the following embodiments and features can be combined with each other.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] In the process of conceiving and implementing this utility model, the applicant discovered at least the following problems: if a traditional cooling system is used, it will increase the complexity of the vehicle and the manufacturing cost.

[0057] The battery pack proposed in this utility model, through the design of the first and second protrusions on the cover, allows the battery pack to adopt a natural cooling method. The design is simple and does not require additional coolant pipes and pumps, making the overall battery pack design more concise and improving the energy density of the battery pack. At the same time, the natural cooling method requires almost no daily maintenance, which is convenient for users of low-power electric vehicles, reduces the later maintenance costs, and can also improve the vehicle's range.

[0058] The battery pack provided by this utility model will be described in detail below with reference to specific embodiments.

[0059] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of the present invention. Figure 2 This is an exploded view of the battery pack according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of the battery pack cover in an embodiment of the present invention.

[0060] like Figures 1 to 3 As shown, this utility model embodiment proposes a battery pack 200, comprising:

[0061] The box body 100 includes a box cover 110 and a frame member 120, and the box cover 110 and the frame member 120 form a receiving cavity;

[0062] The frame component 120 includes a bottom protective plate 121 and a side frame component 122. The box cover 110 is located at the top of the side frame component 122, and the bottom protective plate 121 is located at the bottom of the side frame component 122.

[0063] The battery module is located inside the housing cavity;

[0064] The lid 110 has a first protrusion 111 and a second protrusion 112. The first protrusion 111 and the second protrusion 112 both extend in a direction away from the bottom guard plate 121 and are located at different positions on the lid 110.

[0065] The first protrusion 111 has a first gas flow channel, and the second protrusion 112 has a second gas flow channel. The first gas flow channel and the second gas flow channel are respectively connected to the receiving cavity and guide the gas in the receiving cavity.

[0066] It is understandable that the purpose of the cavity is to house the battery module. It is also easy to understand that the cavity is sealed to prevent side reactions from occurring within the battery cells, which could affect the cell performance.

[0067] For example, the size or shape of the receiving cavity is matched with the size and shape of the battery module. Specifically, it can be adjusted according to the actual situation. This utility model embodiment does not impose too many limitations here.

[0068] In this embodiment of the invention, the battery module can be configured as a rectangular structure. The battery module can be located inside the housing 100.

[0069] Understandably, the housing 100 can be used to support the battery module.

[0070] The dimensions of the aforementioned box 100 can be set according to actual needs, and this embodiment of the utility model does not impose too many restrictions here.

[0071] In addition, it should be noted that the shape of the box 100 is not limited in this embodiment. For example, the box 100 can be a regular shape such as a cuboid or a cylinder. Of course, the box 100 can also be other irregular shapes.

[0072] In one possible implementation, the housing 100 can be a rectangular structure, and the size of the housing 100 can be greater than or equal to the size of the battery module, so that the housing 100 can support the battery module.

[0073] In some embodiments, the cover and bottom protective plate 121 provide additional protection for the battery module, preventing external environmental factors (such as dust, moisture, and physical impact) from affecting the battery module, improving the overall structural integrity of the housing 100, and providing additional rigidity and strength. At the same time, this design also helps to seal the battery pack 200 and maintain the stability of the internal environment.

[0074] In some embodiments, the materials and structure of the cover plate and bottom guard plate 121 can be adjusted according to specific application requirements to adapt to different environmental conditions and performance requirements.

[0075] It should be noted that the lid 110 has a first protrusion 111, wherein the first protrusion 111 extends along the outer side of the lid 110, that is, the first protrusion 111 protrudes from the outer side of the lid 110, so that the inner side of the first protrusion 111 forms a first gas flow channel, which facilitates the flow of gas inside the box 100.

[0076] The cover 110 also has a second protrusion 112, which extends along the outer side of the cover 110. That is, the second protrusion 112 protrudes from the outer side of the cover 110, so that the inner side of the second protrusion 112 forms a second gas flow channel, which facilitates the flow of gas inside the box 100 and facilitates natural heat dissipation of the battery module located in the receiving cavity.

[0077] Through the above-mentioned design, namely the first protrusion 111 and the second protrusion 112 on the cover 110, the battery pack 200 can adopt a natural cooling method. The design is simple and does not require additional coolant pipes and pumps, making the overall battery pack 200 design more concise and improving the energy density of the battery pack 200. At the same time, the natural cooling method requires almost no daily maintenance, which is convenient for users of low-power electric vehicles, reduces the later maintenance costs, and can also improve the vehicle's range.

[0078] In some alternative embodiments, the bottom guard plate 121 is a stamped part.

[0079] It should be noted that the stamping process can form complex geometric shapes and reinforcing ribs on the bottom guard plate 121, thereby improving its structural strength and rigidity. Through the stamping process, the amount of material used can be reduced without affecting strength, thus reducing the weight of the bottom guard plate 121.

[0080] In some alternative embodiments, the first protrusion 111 is located in the middle of the cover 110;

[0081] There are multiple second protrusions 112, which are located around the box cover 110. The second protrusions 112 extend toward the first protrusion 111 so that the second gas flow channel faces the first gas flow channel.

[0082] It should be noted that the design of the first protrusion 111 and the second protrusion 112 forms a gas flow channel, which promotes airflow inside the battery pack 200. The natural convection gas flow can effectively remove heat from inside the battery pack 200, thereby improving heat dissipation efficiency.

[0083] Furthermore, the elimination of additional coolant piping and pumps simplifies the design of the entire battery pack 200, reducing manufacturing costs, minimizing potential failure points, and improving system reliability. Because no additional cooling system components are needed, more space can be freed up inside the battery pack 200 for the arrangement of battery cells, thereby increasing the energy density of the battery pack 200.

[0084] In some embodiments, the first protrusion 111 is in the shape of a "cross" and is located in the middle area of ​​the lid 110, and the second protrusion 112 is in the shape of an arrow, with the arrow pointing to the bend of the first protrusion 111.

[0085] In some alternative embodiments, the side of the first protrusion 111 facing the second protrusion 112 has an arcuate segment.

[0086] It should be noted that the arc-shaped section design can reduce airflow resistance, making the gas flow smoother. The arc-shaped section helps to evenly distribute the airflow, thereby dissipating heat more evenly, avoiding local overheating, and improving the overall performance and safety of the battery pack 200.

[0087] In addition, the arc-shaped structure can reduce turbulence in the airflow, reduce airflow noise, and the arc-shaped section usually has better structural strength and stability than the straight section, which can better withstand external pressure and vibration and extend service life.

[0088] Figure 4 This is a schematic diagram of the frame component in the battery pack according to an embodiment of the present invention. Figure 5 This is a partially exploded view of the frame component in the battery pack according to an embodiment of the present invention.

[0089] like Figures 1 to 5 As shown, in some optional embodiments, the housing 100 further includes a support beam assembly 130, which is disposed on the bottom protective plate 121, and the battery module is disposed on the support beam assembly 130.

[0090] The support beam assembly 130 includes a first support beam 131 and a second support beam 132;

[0091] The first support beam 131 is disposed on the bottom protective plate 121 along the first direction, and the second support beam 132 is disposed on the bottom protective plate 121 along the second direction.

[0092] There is an angle between the first direction and the second direction.

[0093] It should be noted that by setting the first support beam 131 and the second support beam 132 in different directions, a multi-directional support structure is formed. The multi-directional support beam design can provide more installation and fixing points, increase the flexibility and convenience of battery module installation, and effectively improve the structural strength and rigidity of the entire battery pack 200, thereby enhancing its load-bearing capacity.

[0094] In addition, the angled design allows the support beam to disperse and absorb external impact forces in multiple directions, improving the impact resistance of the battery pack 200 and increasing safety.

[0095] like Figure 2 as well as Figure 4 As shown, X represents the first direction and Y represents the second direction.

[0096] like Figures 1 to 5 As shown, in some alternative embodiments, the frame member 122 is made of rolled steel and has a hollow structure; and / or,

[0097] Both the first support beam 131 and the second support beam 132 are made of rolled steel and are hollow structures.

[0098] It should be noted that the hollow structure, while maintaining the necessary strength, significantly reduces the weight of the components, thereby reducing the weight of the battery pack 200, reducing the amount of materials used, and thus lowering production costs, while also meeting the requirements of environmental protection and sustainable development.

[0099] In some embodiments, rolled steel possesses excellent mechanical properties, such as high strength and durability. Even in a hollow structure, it provides sufficient support and impact resistance to ensure the safety and stability of the battery pack 200.

[0100] Furthermore, the hollow structure facilitates airflow and enhances heat dissipation, thereby optimizing the thermal management performance of the battery pack 200. This is crucial for extending battery life and improving safety.

[0101] In some optional embodiments, there are multiple first support beams 131 and multiple second support beams 132, and the multiple first support beams 131 are spaced apart along the second direction;

[0102] Multiple second support beams 132 are spaced apart along the first direction and are all located between the frame member 122 and the first support beam 131 facing the inner wall of the frame member 122.

[0103] It should be noted that the different orientations of the multiple first support beams 131 and second support beams 132 effectively disperse and bear forces from various directions, improving the overall structural stability and resistance to deformation. Furthermore, their evenly spaced arrangement allows for a more uniform distribution of load across the entire structure, reducing localized stress concentration and extending the lifespan of the battery pack 200.

[0104] In some embodiments, the top sidewalls of the first support beam 131 and the second support beam 132 are provided with holes that match the electrical plug-in.

[0105] In some embodiments, at least one of the plurality of first support beams 131 has a "V" shaped cross section welded and fixed to the upper surface of the bottom cover plate 121, and has equidistant threaded holes at the bottom for fixing the wire harness inside the package with standard threaded clips.

[0106] In other embodiments, one of the plurality of first support beams 131 is close to the inner side of the frame member 122, and its cross-section is "L" shaped. One side is welded and fixed to the upper surface of the bottom guard plate 121, and the other side is welded and fixed to the side of the frame member 122.

[0107] In other embodiments, two openings are provided on the side of the first support beam 131 located in the middle of the housing 100 to ensure air circulation inside the bag and to some extent promote heat dissipation of the battery module inside the bag; while reducing weight and lightening, the structural flexibility of the first support beam 131 is increased to some extent.

[0108] In some embodiments, the battery pack 200 also includes a bracket 150 with a "U" shaped cross section, which is welded to the upper surface of the bottom cover plate 121 at the bottom and has a threaded hole at the top for securing the wiring harness inside the pack with a standard threaded clip.

[0109] In some alternative embodiments, the bottom guard plate 121 has at least two third protrusions 1211 that protrude toward the box cover 110 and are located between two adjacent first support beams 131.

[0110] A first groove 12111 and a second groove 12112 are provided on the third protrusion 1211. Both the first groove 12111 and the second groove 12112 are connected to the receiving cavity. The first groove 12111 is located in the middle of the third protrusion 1211, and the second groove 12112 is located at the edge of the third protrusion 1211.

[0111] It should be noted that the design of the third protrusion 1211 increases the structural strength and rigidity of the bottom protective plate 121, helping to withstand the pressure from the battery module and the external environment. The groove design promotes airflow and enhances heat dissipation. The different positions of the first groove 12111 and the second groove 12112 help optimize airflow paths in different areas, improving the thermal management performance of the battery pack 200.

[0112] Furthermore, by providing a groove on the third protrusion 1211, the amount of material used can be reduced without significantly affecting the strength, thereby reducing the weight of the bottom guard plate 121 and improving energy efficiency.

[0113] In some alternative embodiments, the battery pack 200 includes a seal 140 disposed between the cover 110 and the frame member 122.

[0114] It should be noted that the seal 140 effectively prevents dust, moisture and other external contaminants from entering the battery pack 200. The battery pack 200 can achieve good airtightness, prevent internal gas leakage, maintain a stable environment inside the battery pack 200, and protect the safety and performance of the battery module and other internal components.

[0115] In addition, the seal 140 can provide a certain buffer between the cover 110 and the frame 122, reducing the transmission of vibration and noise, improving ride comfort and the durability of the battery pack 200.

[0116] In addition, the seal 140 helps to isolate the electrical system inside the battery pack 200, reducing the risk of short circuits or other electrical failures and improving overall safety.

[0117] In some embodiments, the seal 140 may be a sealing ring.

[0118] In some embodiments, the seal 140 is made of foamed silicone and is adhered between the end of the lid 110 and the end of the frame member 122.

[0119] In some embodiments, a plurality of lifting lugs 160 are welded to the outer periphery of the frame member 122 to facilitate transportation and lifting.

[0120] The battery pack provided in this embodiment of the utility model includes a housing, which includes a cover and a frame, forming a receiving cavity between the cover and the frame. The frame includes a bottom protective plate and a side frame, with the cover located at the top of the side frame and the bottom protective plate located at the bottom of the side frame. A battery module is located within the receiving cavity. The cover has a first protrusion and a second protrusion, both extending in a direction away from the bottom protective plate and located at different positions on the cover. The first protrusion has a first gas flow channel, and the second protrusion has a second gas flow channel. The first and second gas flow channels are respectively connected to the receiving cavity and guide the gas within the receiving cavity.

[0121] The design of the first and second protrusions on the battery pack cover allows for natural cooling, which is simple and eliminates the need for additional coolant lines and pumps. This results in a more streamlined battery pack design and increased energy density. Furthermore, natural cooling requires almost no routine maintenance, which is convenient for users of low-power electric vehicles, reduces maintenance costs, and improves the vehicle's range.

[0122] In addition, this utility model embodiment also provides an electric vehicle, including the battery pack 200 described above.

[0123] It should be noted that the specific structure of the battery pack 200 will not be discussed in detail here; please refer to the above.

[0124] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0125] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery pack (200), characterized in that, include: The box body (100) includes a box cover (110) and a frame member (120), wherein the box cover (110) and the frame member (120) form a receiving cavity; The frame member (120) includes a bottom protective plate (121) and a side frame member (122), the box cover (110) is disposed at the top of the side frame member (122), and the bottom protective plate (121) is located at the bottom of the side frame member (122); The battery module is located within the receiving cavity; The box cover (110) has a first protrusion (111) and a second protrusion (112), both of which extend in a direction away from the bottom guard plate (121) and are located at different positions on the box cover (110). The first protrusion (111) has a first gas flow channel, and the second protrusion (112) has a second gas flow channel. The first gas flow channel and the second gas flow channel are respectively connected to the receiving cavity and guide the gas in the receiving cavity.

2. The battery pack (200) according to claim 1, characterized in that, The bottom guard plate (121) is a stamped part.

3. The battery pack (200) according to claim 1, characterized in that, The first protrusion (111) is located in the middle of the box cover (110); There are multiple second protrusions (112), which are located around the box cover (110). The second protrusions (112) extend toward the first protrusion (111) so that the second gas flow channel faces the first gas flow channel.

4. The battery pack (200) according to claim 3, characterized in that, The first protrusion (111) has an arc-shaped segment on the side facing the second protrusion (112).

5. The battery pack (200) according to any one of claims 1-4, characterized in that, The housing (100) also includes a support beam assembly (130), which is disposed on the bottom protective plate (121), and the battery module is disposed on the support beam assembly (130); The support beam assembly (130) includes a first support beam (131) and a second support beam (132); The first support beam (131) is disposed on the bottom protective plate (121) along a first direction, and the second support beam (132) is disposed on the bottom protective plate (121) along a second direction; There is an angle between the first direction and the second direction.

6. The battery pack (200) according to claim 5, characterized in that, The frame member (122) is made of rolled steel and has a hollow structure; and / or, Both the first support beam (131) and the second support beam (132) are rolled steel and are hollow structures.

7. The battery pack (200) according to claim 5, characterized in that, There are multiple first support beams (131) and multiple second support beams (132), and the multiple first support beams (131) are spaced apart along the second direction; Multiple second support beams (132) are spaced apart along the first direction and are all located between the frame member (122) and the first support beam (131) facing the inner wall of the frame member (122).

8. The battery pack (200) according to claim 7, characterized in that, The bottom guard plate (121) has at least two third protrusions (1211), which protrude toward the box cover (110) and are located between two adjacent first support beams (131); The third protrusion (1211) has a first groove (12111) and a second groove (12112), both of which are in communication with the receiving cavity. The first groove (12111) is located in the middle of the third protrusion (1211), and the second groove (12112) is located at the edge of the third protrusion (1211).

9. The battery pack (200) according to any one of claims 1-4, characterized in that, The battery pack (200) includes a seal (140) disposed between the cover (110) and the frame member (122).

10. An electric vehicle, characterized in that, Includes the battery pack (200) as described in any one of claims 1 to 9.

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