Upper cover assembly, battery pack and electric device

Abstract

An upper cover assembly, a battery pack and an electric device. The upper cover assembly comprises a frame and an upper cover, wherein the frame comprises a frame body, which encloses to form a cavity provided with an opening; the frame body has a connecting portion, which extends towards the interior of the cavity and is configured to connect a cell group of the battery pack; and the upper cover is connected to an upper portion of the frame body and closes the opening.

Description

Top cover assembly, battery pack and electrical equipment

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202421679551.0, filed on July 16, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a top cover assembly, a battery pack, and an electrical device. Background Technology

[0004] New energy vehicles typically consist of a vehicle body and a battery pack mounted on it. The battery pack is not only the energy source but also a key factor affecting the overall vehicle performance, safety, and range. However, in existing technologies, because the battery pack's cover serves as the vehicle's floor or needs to withstand significant loads, it is prone to deformation or damage, affecting the safety and reliability of both the battery pack and the vehicle. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a cover assembly that significantly reduces the risk of deformation or damage to the cover due to excessive load, resulting in a more reasonable distribution of structural strength and improved reliability and service life.

[0006] This application also proposes a battery pack including the aforementioned top cover assembly.

[0007] This application also proposes an electrical device comprising the aforementioned battery pack.

[0008] According to an embodiment of this application, a top cover assembly for a battery pack includes: a frame, the frame including a frame body, the frame body enclosing a cavity with an opening, the frame body having a connecting portion extending toward the cavity, the connecting portion for connecting the battery pack's cell assembly; and a top cover connected above the frame body and closing the opening.

[0009] According to the embodiments of this application, the top cover assembly includes a frame body, which encloses a cavity with an opening. The frame body has a connecting portion extending into the cavity. The connecting portion is used to connect the battery cell assembly of the battery pack. The top cover is connected above the frame body and closes the opening, so that the connecting portion bears at least part of the weight of the battery cell assembly on the top cover. This maximizes the distribution of the weight of the battery cell assembly to the frame, significantly reduces the risk of deformation or damage to the top cover due to excessive load, and makes the structural strength distribution of the top cover assembly more reasonable, improving reliability and service life.

[0010] In some embodiments of this application, the connecting portion is a flange extending toward the cavity.

[0011] In some embodiments of this application, the connecting portion is located at the upper end of the frame body and fits against the upper cover.

[0012] In some embodiments of this application, the battery cell assembly includes a plurality of battery cells arranged along a first direction, the connecting portion includes a first sub-side, the frame body has the first sub-side on two opposing inner walls along a second direction, the first sub-side extends along the first direction, the two first sub-sides are arranged opposite each other and are respectively used to connect to the two ends of each battery cell along the second direction, wherein the first direction and the second direction intersect.

[0013] In some embodiments of this application, the connecting portion further includes a second sub-side, the frame body having two inner walls opposite each other along the first direction having the second sub-side, the second sub-side extending along the second direction, and the two second sub-sides being respectively used to connect to the battery cells located at opposite ends of the first direction.

[0014] In some embodiments of this application, the frame further includes an expansion beam located within the frame body and extending along the second direction, wherein the expansion beam is one or a plurality of expansion beams spaced apart along the first direction.

[0015] In some embodiments of this application, the top cover and the frame are connected by a first fastener;

[0016] And / or, a first sealant is provided between the top cover and the frame.

[0017] A battery pack according to an embodiment of this application includes: a cell assembly; the aforementioned top cover assembly, wherein at least a portion of the cell assembly is located in the cavity, and the connecting portion is connected to the cell assembly.

[0018] According to the battery pack of the present application embodiment, a top cover assembly is provided. The frame includes a frame body, which encloses a cavity with an opening. The frame body has a connecting portion extending into the cavity. The top cover is connected to the top of the frame body and closes the opening. At least a portion of the battery cell assembly is located in the cavity. The connecting portion is connected to the battery cell assembly so that the connecting portion bears at least a portion of the weight of the battery cell assembly on the top cover. This maximizes the distribution of the weight of the battery cell assembly to the frame, significantly reduces the risk of deformation or damage to the top cover due to excessive load, and makes the structural strength distribution of the battery pack more reasonable, improving reliability and service life.

[0019] In some embodiments of this application, the battery pack is connected to the top cover.

[0020] In some embodiments of this application, the battery cell assembly is bonded to the connecting portion; and / or, the battery cell assembly is bonded to the top cover.

[0021] In some embodiments of this application, a portion of the top cover is recessed toward the cavity to form a recessed portion, which is connected to the battery cell assembly.

[0022] In some embodiments of this application, a structural adhesive is also included, which is located above the battery cell assembly, and the top cover and the connecting portion are both connected to the battery cell assembly via the structural adhesive.

[0023] In some embodiments of this application, the lower surface of the frame body is higher than the highest point of the electrode post of the battery cell in the battery cell assembly.

[0024] In some embodiments of this application, a lower housing is further included, the lower housing including a housing body and a first side plate, the housing body being located below and connected to the battery cell assembly, the first side plate being disposed around the housing body and enclosing a first accommodating space, a portion of the battery cell assembly being located within the first accommodating space, and one end of the first side plate facing away from the housing body being connected to the frame body.

[0025] In some embodiments of this application, the shell body has heat exchange channels.

[0026] In some embodiments of this application, a bottom protective plate is further included, the bottom protective plate including a protective plate body and a second side plate, the protective plate body being located below the shell body, the second side plate being arranged around the protective plate body and enclosing to form a second receiving space, the lower shell being located within the second receiving space, and one end of the second side plate facing away from the protective plate body being connected to the frame body.

[0027] In some embodiments of this application, the frame body has a first mounting hole that penetrates the frame body in a vertical direction, and the end of the second side plate opposite to the protective plate body has a mounting edge. The mounting edge penetrates the second mounting hole in the mounting edge in the vertical direction. The first mounting hole and the second mounting hole are opposite to and communicate with each other. The battery pack further includes a lifting lug that passes through the first mounting hole and the second mounting hole.

[0028] The electrical device according to the embodiments of this application includes the battery pack described above.

[0029] According to the embodiments of this application, the electrical equipment is provided with a battery pack, in which at least part of the battery cell group is located in the cavity, and the connecting part is connected to the battery cell group, so that the connecting part bears at least part of the weight of the battery cell group on the top cover, thereby maximizing the distribution of the weight of the battery cell group to the frame, significantly reducing the risk of deformation or damage to the top cover due to excessive load, making the structural strength distribution of the battery pack more reasonable, and improving the reliability and service life of the electrical equipment.

[0030] In some embodiments of this application, the electrical equipment is a vehicle, the vehicle includes a body, and the frame body is connected to the body.

[0031] In some embodiments of this application, the upper cover is the bottom plate of the vehicle body.

[0032] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0033] Figure 1 is a structural diagram of a battery pack according to an embodiment of this application;

[0034] Figure 2 is an exploded view of a battery pack according to an embodiment of this application;

[0035] Figure 3 is an enlarged view of point A in Figure 2;

[0036] Figure 4 is a diagram of the method at point B in Figure 3;

[0037] Figure 5 is a top view of a battery pack according to an embodiment of this application;

[0038] Figure 6 is a cross-sectional view along line CC in Figure 5;

[0039] Figure 7 is an enlarged view of point D in Figure 6;

[0040] Figure 8 is a structural diagram of the frame and lugs according to an embodiment of this application;

[0041] Figure 9 is a schematic diagram of an electrical device according to an embodiment of this application.

[0042] Reference numerals: 1000, Electrical equipment; 100, Battery pack; 10, Top cover assembly; 1, Frame; 11, Frame body; 111, Connecting part; 1111, First sub-side; 1112, Second sub-side; 112, First mounting hole; 12, Expansion beam; 113, Cavity; 114, Opening; 2, Cell assembly; 21, Cell; 3, Top cover; 31, Recess; 41, Structural adhesive; 42, Thermally conductive adhesive; 43, First sealant; 44, Second sealant; 5, Lower shell; 51, Shell body; 52, First side plate; 53, First receiving space; 6, Bottom protective plate; 61, Protective plate body; 62, Second side plate; 621, Mounting edge; 622, Second mounting hole; 63, Second receiving space; 7, Lifting lug; 81, First fastener; 82, Second fastener; 83, Third fastener. Detailed Implementation

[0043] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0044] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not 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 application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, 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.

[0046] The cover assembly 10 according to an embodiment of this application is described below with reference to the accompanying drawings.

[0047] As shown in Figures 1, 2, and 5-8, the top cover assembly 10 according to an embodiment of this application is used for the battery pack 100 and includes a frame 1 and a top cover 3.

[0048] The frame 1 includes a frame body 11, which encloses a cavity 113 with an opening 114. The frame body 11 has a connecting part 111 extending into the cavity 113. The connecting part 111 is used to connect the battery cell group 2 of the battery pack. The upper cover 3 is connected to the top of the frame body 11 and closes the opening 114.

[0049] Therefore, the cavity 113 with the opening 114 is formed by the frame body 11, so that part of the battery cell assembly 2 can be located in the cavity 113, which effectively protects the battery cell assembly 2 from external squeezing, impact and collision, reducing the risk of damage to the battery cell assembly 2. Furthermore, the upper cover 3 is connected to the upper part of the frame body 11 and closes the opening 114, ensuring the sealing of the upper cover assembly 10 and further improving the reliability of the battery pack 100 using the upper cover assembly 10.

[0050] Simultaneously, the connecting part 111 connects to the cell assembly 2, allowing the connecting part 111 to bear at least a portion of the weight of the cell assembly 2 on the top cover 3. This maximizes the distribution of the weight of the cell assembly 2 onto the frame 1, significantly reducing the risk of deformation or damage to the top cover 3 due to excessive load. This results in a more reasonable distribution of structural strength in the top cover assembly 10, improving reliability and service life. For example, when the battery pack 100 using this top cover assembly 10 is applied to a vehicle and the vehicle experiences vibration and impact, the force on the cell assembly 2 is transmitted to the top cover 3 and, via the connecting part 111, to the frame body 11. The frame 1 shares some of the force, thereby improving the overall structural stability of the battery pack 100.

[0051] In addition, the battery pack 2 is formed by stacking multiple battery cells 21. During the stacking of multiple battery cells 21, the connecting part 111 can provide a certain support for the battery cells 21, simplifying the assembly difficulty of the battery pack 100, improving assembly efficiency, and reducing costs.

[0052] In the embodiments of this application, the overlap between the connecting part 111 and the cell assembly 2 is 50mm. This arrangement ensures an effective connection between the connecting part 111 and the cell assembly 2, guarantees that the connecting part 111 bears at least a portion of the weight of the cell assembly 2 on the top cover 3, and improves the reliability of the battery pack 100.

[0053] In the embodiments of this application, the upper and lower ends of the cavity 113 are both open to form openings 114, and the upper cover 3 is connected to the upper part of the frame body 11 and closes the opening 114 at the upper end of the cavity 113. Thus, this arrangement ensures the sealing of the upper end of the frame body 11, thereby effectively protecting the cell assembly 2 and further improving the reliability of the battery pack 100 using the upper cover assembly 10.

[0054] According to the battery pack 100 of this application embodiment, the frame 1 includes a frame body 11, which encloses a cavity 113 with an opening 114. The frame body 11 has a connecting portion 111 extending into the cavity 113. The connecting portion 111 is used to connect the battery cell group 2 of the battery pack. The upper cover 3 is connected above the frame body 11 and closes the opening 114, so that the connecting portion 111 bears at least part of the weight of the battery cell group 2 borne by the upper cover 3, thereby maximizing the distribution of the weight of the battery cell group 2 to the frame 1, significantly reducing the risk of deformation or damage to the upper cover 3 due to excessive load, making the structural strength distribution of the upper cover assembly 10 more reasonable, and improving reliability and service life.

[0055] In some embodiments of this application, as shown in Figures 1, 2, and 5-8, the connecting portion 111 is a flange extending into the cavity 113. Thus, this arrangement ensures that the flange extending into the cavity 113 from one end of the frame body 11 near the cavity 111 forms the connecting portion 111, which is part of the frame body 11. This guarantees the structural strength of the connecting portion 111, thereby ensuring that the connecting portion 111 bears at least a portion of the weight of the battery pack 2 on the upper cover 3, improving the reliability of the upper cover assembly 10.

[0056] In some embodiments of this application, as shown in Figures 1, 2, and 5-8, the connecting portion 111 is located at the upper end of the frame body 11 and fits against the upper cover 3. It can be understood that since the upper cover 3 is located above and connected to the frame body 11, the connection portion 111, being located at the upper end of the frame body 11 and fitting against the upper cover 3, effectively increases the contact area between the upper cover 3 and the frame 1, thereby improving the reliability of their connection.

[0057] Meanwhile, by increasing the contact area between the top cover 3 and the frame 1, the force can be transmitted between the top cover 3 and the frame 1 over a wider range and more evenly, thereby effectively reducing local cracking or damage caused by stress concentration in the top cover 3 or the frame 1, improving the structural reliability of the top cover 3 and the frame 1, and thus improving the reliability of the battery pack 100.

[0058] In addition, when the battery pack 100 with the top cover assembly 10 is used in a vehicle, the top strength of the battery pack 100 is effectively enhanced by improving the structural reliability of the top cover 3 and the frame 1, thereby improving the overall structural strength of the vehicle and enhancing the vehicle's safety and reliability.

[0059] In the embodiments of this application, the sum of the overlap dimension between the top cover 3 and the frame body 11 and the overlap dimension between the top cover 3 and the connecting portion 111 is 150mm. Therefore, this arrangement further increases the contact area between the top cover 3 and the frame 1, improving the reliability of the battery pack 100.

[0060] In some embodiments of this application, as shown in Figures 3, 4, and 6-8, the battery cell assembly 2 includes a plurality of battery cells 21, which are arranged along a first direction. The connecting portion 111 includes a first sub-side 1111. The frame body 11 has two opposite inner walls with first sub-sides 1111 along a second direction. The first sub-sides 1111 extend along the first direction. The two first sub-sides 1111 are arranged opposite each other and are respectively used to connect to the two ends of each battery cell 21 along the second direction. The first direction, the second direction, and the up and down direction intersect.

[0061] Thus, this arrangement allows each cell 21 to be connected to two first sub-sides 1111 at both ends along the second direction, so that the two sub-sides share the weight of each cell 21, ensuring that the weight of the cell pack 2 is distributed to the frame 1 to the maximum extent, further improving the reliability of the battery pack 100. Simultaneously, during the stacking of multiple cells 21 to form the cell pack 2, by setting each cell 21 opposite to the two first sub-sides 1111 at both ends along the second direction, the assembly difficulty of the battery pack 100 is effectively reduced, assembly efficiency is improved, and costs are reduced.

[0062] In some embodiments of this application, as shown in Figures 3, 4, and 6-8, the connecting portion 111 further includes a second sub-side 1112. The two inner walls of the frame body 11 opposite each other along the first direction have the second sub-side 1112. The second sub-side 1112 extends along the second direction, and the two second sub-sides 1112 are respectively used to connect with the battery cells 21 located at opposite ends in the first direction.

[0063] Therefore, this configuration allows the second sub-side 1112 to further share the weight of the cell assembly 2, improving the reliability of the battery pack 100. Simultaneously, during the stacking of multiple cells 21 to form the cell assembly 2, the two second sub-sides 1112 are used to connect to the cells 21 located at opposite ends in the first direction, further reducing the assembly difficulty of the battery pack 100, improving assembly efficiency, and lowering costs.

[0064] In some embodiments of this application, as shown in FIG8, the frame 1 further includes an expansion beam 12, which is located inside the frame body 11 and extends along a second direction. The expansion beam 12 is one or a plurality of beams spaced apart along a first direction. At least one side of the expansion beam 12 along the first direction is provided with a battery cell 21.

[0065] It is understood that both the expansion beam 12 and the battery cell 21 extend along the second direction. The battery cell 21 is provided on at least one side of the expansion beam 12 along the first direction, so that the expansion beam 12 can effectively fix and position the battery cell 21, ensuring that the battery cell 21 is stably positioned within the battery pack 100. When the battery cell 21 expands to a certain extent during charging and discharging, the expansion beam 12 can withstand this expansion force, preventing the battery cell 21 from being damaged due to excessive expansion or causing safety problems, thereby improving the reliability and safety of the battery pack 100.

[0066] Meanwhile, by having one expansion beam 12 or multiple expansion beams spaced apart along the first direction, the battery pack 100 can be flexibly configured according to different capacity requirements, meeting the needs of battery packs 100 with different capacities, adapting to different application scenarios, and improving versatility.

[0067] In some specific embodiments, as shown in Figures 7 and 8, the frame 1 of this application only includes the frame body 11 and the expansion beam 12, and the frame body 11 is connected to the vehicle body. Therefore, the frame body 11 provides a certain degree of protection for the battery cell assembly 2, effectively preventing the battery cell assembly 2 from being subjected to external pressure, impact and collision, reducing the risk of damage to the battery cell assembly 2. The inner wall of the frame body 11 has a connecting part 111 extending inward to the frame body 11 to bear at least part of the weight of the battery cell assembly 2 borne by the upper cover 3, and to increase the contact area between the upper cover 3 and the frame 1, thereby improving the structural reliability of the upper cover 3 and the frame 1. The expansion beam 12 fixes and positions the battery cell 21 and bears the expansion force of the battery cell 21, so that the frame 1 only retains the main load-bearing frame part of the battery pack 100. While achieving a more reasonable distribution of structural strength of the battery pack 100 and maintaining the high strength of the battery pack 100, the structure of the frame 1 is simplified. Moreover, the load between the battery pack 100 and the vehicle body is mainly borne by the high-strength frame 1, without the need for excessive reinforcement at the battery pack 100 and vehicle level. The structure between components is simple, reducing many local additional reinforcement processes and effectively reducing costs.

[0068] The battery pack 100 according to an embodiment of this application is described below.

[0069] The battery pack 100 according to an embodiment of this application, as shown in Figures 1, 2, and 5-8, includes a cell assembly 2 and a top cover assembly 10. At least a portion of the cell assembly 2 is located within a cavity 113, and a connecting portion 111 is connected to the cell assembly 2.

[0070] Therefore, by having part of the cell assembly 2 located within the cavity 113, the cell assembly 2 is effectively protected from external squeezing, impact, and collision, reducing the risk of damage to the cell assembly 2. Furthermore, by connecting the top cover 3 to the upper part of the frame body 11 and closing the opening 114, the sealing performance of the top cover assembly 10 is ensured, further improving the reliability of the battery pack 100 using the top cover assembly 10.

[0071] Simultaneously, the connecting part 111 connects to the cell assembly 2, allowing the connecting part 111 to bear at least a portion of the weight of the cell assembly 2 on the top cover 3. This maximizes the distribution of the weight of the cell assembly 2 onto the frame 1, significantly reducing the risk of deformation or damage to the top cover 3 due to excessive load. This results in a more reasonable distribution of structural strength in the top cover assembly 10, improving reliability and service life. For example, when the battery pack 100 is used in a vehicle and the vehicle experiences vibration and impact, the force on the cell assembly 2 is transmitted to the top cover 3 and, via the connecting part 111, to the frame body 11. The frame 1 shares some of the force, thereby improving the overall structural stability of the battery pack 100.

[0072] In addition, the battery pack 2 is formed by stacking multiple battery cells 21. During the stacking of multiple battery cells 21, the connecting part 111 can provide a certain support for the battery cells 21, simplifying the assembly difficulty of the battery pack 100, improving assembly efficiency, and reducing costs.

[0073] According to the battery pack 100 of this application embodiment, the frame 1 includes a frame body 11, which encloses a cavity 113 with an opening 114. The frame body 11 has a connecting portion 111 extending into the cavity 113. The upper cover 3 is connected to the upper part of the frame body 11 and closes the opening 114. At least a portion of the battery cell assembly 2 is located in the cavity 113. The connecting portion 111 is connected to the battery cell assembly 2 so that the connecting portion 111 bears at least a portion of the weight of the battery cell assembly 2 borne by the upper cover 3. This maximizes the distribution of the weight of the battery cell assembly 2 to the frame 1, significantly reduces the risk of deformation or damage to the upper cover 3 due to excessive load, and makes the structural strength distribution of the battery pack 100 more reasonable, improving reliability and service life.

[0074] In some embodiments of this application, as shown in Figures 1, 2, and 5-8, the battery cell assembly 2 is connected to the upper cover 3. This arrangement allows the force of the battery cell assembly 2 to be better transmitted to the upper cover 3, thereby improving the overall reliability.

[0075] In some embodiments of this application, as shown in Figures 2, 3, and 7, the battery pack 100 further includes structural adhesive 41. The structural adhesive 41 is located above the cell assembly 2, and both the upper cover 3 and the connecting portion 111 are connected to the cell assembly 2 via the structural adhesive 41. Thus, the structural adhesive 41 achieves adhesive bonding between the upper cover 3 and the cell assembly 2, and between the connecting portion 111 and the cell assembly 2, thereby improving the sealing effect of the battery pack 100. Furthermore, the inclusion of structural adhesive 41 reduces assembly difficulty and improves assembly efficiency during the assembly process of the battery pack 100.

[0076] In some embodiments of this application, the cell assembly 2 is bonded to the connecting portion 111. This arrangement allows the cell assembly 2 to be connected to the connecting portion 111, enabling the weight of the cell assembly 2 to be distributed by the frame 1, thus improving reliability. Simultaneously, the bonded connection between the cell assembly 2 and the connecting portion 111 provides better sealing, improving the sealing effect of the battery pack 100. Furthermore, during the assembly of the battery pack 100, the bonded connection between the cell assembly 2 and the connecting portion 111 reduces assembly difficulty and improves assembly efficiency.

[0077] In some embodiments of this application, the cell assembly 2 is bonded to the top cover 3. This connection effectively prevents displacement or loosening of the cell assembly 2 under external force or vibration, improving reliability. Simultaneously, the bonded connection provides better sealing, enhancing the sealing effect of the battery pack 100. Furthermore, during the assembly of the battery pack 100, the bonded connection reduces assembly difficulty and improves assembly efficiency.

[0078] In some embodiments of this application, as shown in Figures 2, 3, and 7, a portion of the upper cover 3 is recessed towards the cavity 113 to form a recessed portion 31, which is connected to the cell assembly 2. It is understood that since the upper cover 3 is located above and connected to the frame body 11, and the connecting portion 111 is located at the upper end of the frame body 11 and fits against the upper cover 3, and the connecting portion 111 is connected to the cell assembly 2, the recessed portion 31 serves to avoid the connecting portion 111, allowing the upper cover 3 and the cell assembly 2 to fit better, improving their connection strength and force transmission, reducing stress concentration, and improving the overall reliability of the battery pack 100.

[0079] In some embodiments of this application, as shown in Figures 2, 3, and 7, a first sealant 43 is provided between the top cover 3 and the frame 1. This sealant 43 effectively prevents dust, moisture, or other contaminants from entering the battery pack 100 through the gap between the top cover 3 and the frame 1, thereby improving the reliability of the battery pack 100.

[0080] In some embodiments of this application, as shown in FIG7, the upper cover 3 and the frame 1 are connected by a first fastener 81. Thus, this arrangement achieves the connection between the upper cover 3 and the frame 1 while ensuring the reliability of their connection.

[0081] In some embodiments of this application, as shown in FIG7, the lower surface of the frame body 11 is higher than the highest point of the electrode post of the cell 21 of the cell group 2.

[0082] Understandably, when the battery pack 100 is used in a vehicle, the cell assembly 2 is located inside the frame body 11 and below the connecting part 111. During the process of stacking multiple cells 21 to form the cell assembly 2, the connecting part 111 can be located below the cell assembly 2, allowing multiple cells 21 to be directly stacked inside the frame body 11. Simultaneously, by ensuring that the lower surface of the frame body 11 is higher than the highest point of the terminal post of the cell 21 in the cell assembly 2, the frame body 11 does not obstruct terminal-side processes such as connecting piece welding, collector welding, and protective cover assembly. This optimizes the process route, ensuring that multiple cells 21 can be directly stacked inside the frame body 11, reducing assembly difficulty and improving assembly efficiency.

[0083] Compared to existing technologies where the frame position obstructs the terminal side processing, preventing cells from being stacked within the tray and necessitating an inverted stacking process, increasing process complexity and making it easier for foreign objects such as aluminum shavings to enter between cells, leading to an increased battery pack defect rate, the battery pack 100 of this application uses a frame body 11 whose lower surface is higher than the highest point of the terminal post of the cell 21 in the cell assembly 2. This allows multiple cells 21 to be directly stacked inside the frame body 11 without the need for an inverted tray, reducing the risk of the tray bumping the cell assembly 2 during inversion and preventing foreign objects such as aluminum shavings from entering between the cells 21 during inversion. This improves the yield of the battery pack 100 and reduces its safety risks.

[0084] In some embodiments of this application, as shown in Figures 2, 3, and 7, the battery pack 100 further includes a lower housing 5. The lower housing 5 includes a housing body 51 and a first side plate 52. The housing body 51 is located below and connected to the battery cell assembly 2. The first side plate 52 surrounds the housing body 51 and encloses a first receiving space 53. A portion of the battery cell assembly 2 is located within the first receiving space 53. One end of the first side plate 52 facing away from the housing body 51 is connected to the frame body 11.

[0085] Understandably, by positioning the casing 51 below and connecting it to the cell assembly 2, the lower casing 5 secures the cell assembly 2, thereby improving the reliability of the battery pack 100. Simultaneously, the first side plate 52 surrounds the casing 51, forming a first receiving space 53. A portion of the cell assembly 2 is located within this first receiving space 53, providing some protection for the cell assembly 2 and effectively preventing it from being subjected to external pressure, impact, or collision, reducing the risk of damage and further improving the reliability of the battery pack 100. Furthermore, the connection between the end of the first side plate 52 facing away from the casing 51 and the frame body 11 further enhances the overall structural stability and safety of the battery pack 100.

[0086] In some embodiments of this application, the shell body 51 has heat exchange channels, thereby the shell body 51 can act as a cooling plate to cool the battery cell assembly 2. It should be noted that the presence of heat exchange channels in the shell body 51 is known to those skilled in the art and will not be described in detail here.

[0087] In the embodiments of this application, the battery cell assembly 2 and the housing body 51 are bonded together by thermally conductive adhesive 42. Thus, while ensuring the connection between the battery cell assembly 2 and the housing body 51, the thermally conductive adhesive 42 allows the heat generated by the battery cell assembly 2 to be quickly and evenly transferred to the housing body 51, further enhancing the cooling effect on the battery cell assembly 2.

[0088] In some embodiments, the lower housing 5 is a single piece formed by stamping, thereby improving the overall structural strength of the lower housing 5.

[0089] In some embodiments of this application, as shown in Figures 2, 3, and 7, a second sealant 44 is provided between the first side panel 52 and the frame 1. This sealant 44 effectively prevents dust, moisture, or other contaminants from entering the battery pack 100 through the gap between the first side panel 52 and the frame 1, thereby improving the reliability of the battery pack 100.

[0090] In some embodiments of this application, as shown in FIG7, the first side plate 52 and the frame 1 are connected by a second fastener 82. This arrangement achieves the connection between the first side plate 52 and the frame 1 while ensuring the reliability of their connection.

[0091] In some embodiments of this application, as shown in Figures 2, 3, and 7, the battery pack 100 further includes a bottom protective plate 6. The bottom protective plate 6 includes a protective plate body 61 and a second side plate 62. The protective plate body 61 is located below the cell assembly 2. The second side plate 62 surrounds the protective plate body 61 and encloses it to form a second receiving space 63. A portion of the lower housing 5 is located within the second receiving space 63. One end of the second side plate 62 facing away from the protective plate body 61 is connected to the frame body 11.

[0092] Therefore, the second receiving space 63 is formed by the protective plate body 61 and the second side plate 62, and part of the lower housing 5 is located within the second receiving space 63. This provides a certain degree of protection for the lower housing 5 and the cell assembly 2, preventing the lower housing 5 from physical damage such as mechanical impact, scratches, and collisions, and further preventing the cell assembly 2 from being subjected to external compression, impact, and collisions, reducing the risk of damage to the cell assembly 2 and further improving the reliability of the battery pack 100. In addition, the second side plate 62, with one end facing away from the protective plate body 61, is connected to the frame body 11, further improving the overall structural stability and safety of the battery pack 100.

[0093] In some embodiments of this application, as shown in FIG7, the second side plate 62 and the frame 1 are connected by a third fastener 83. This arrangement achieves the connection between the first side plate 52 and the frame 1 while ensuring the reliability of their connection.

[0094] In some embodiments of this application, as shown in Figures 3, 7 and 8, the frame body 11 has a first mounting hole 112 that extends through the frame body 11 in the vertical direction, and the end of the second side plate 62 facing away from the protective plate body 61 has a mounting edge 621. The mounting edge 621 extends through the second mounting hole 622 in the vertical direction. The first mounting hole 112 and the second mounting hole 622 are opposite to and communicate with each other. The battery pack 100 also includes a hanging lug 7, which is inserted into the first mounting hole 112 and the second mounting hole 622.

[0095] It is understandable that when the battery pack 100 is applied to a vehicle, the connection between the battery pack 100 and the vehicle body is achieved through the hanger 7. Thus, by having the hanger 7 pass through the first mounting hole 112 of the frame body 11 and the second mounting hole 622 of the second side plate 62, the connection between the frame 1 and the vehicle body and the underbody 6 and the vehicle body is achieved, thereby ensuring the reliability of the connection between the battery pack 100 and the vehicle body.

[0096] Meanwhile, with the battery cell assembly 2 located inside the frame body 11 and below the connecting part 111, part of the battery cell assembly 2 is located in the second receiving space 63 of the bottom guard plate 6, and the frame body 11 is located above the mounting edge 621, so that the hanging lug 7 is located at the top and relatively outer area of ​​the battery pack 100, so that the battery pack 100 is connected to the vehicle body through the relatively outer area of ​​the top. At this time, the battery pack 100 is only subjected to the vertical force of the vehicle body, reducing the force transmission path and making it more conducive to improving the rigidity of the whole vehicle and the lateral compression resistance.

[0097] In the embodiments of this application, there are multiple lifting lugs 7, multiple first mounting holes 112 corresponding to each of the lifting lugs 7, and multiple second mounting holes 622 corresponding to each of the lifting lugs 7. Thus, the connection strength between the battery pack 100 and the vehicle body is further improved by using multiple lifting lugs 7, thereby improving the overall reliability.

[0098] The following describes an embodiment of the electrical equipment 1000 of this application.

[0099] According to an embodiment of this application, the electrical device 1000 includes a battery pack 100. The frame 1 includes a frame body 11, which encloses a cavity 113 with an opening 114. The frame body 11 has a connecting portion 111 extending into the cavity 113. The upper cover 3 is connected to the upper part of the frame body 11 and closes the opening 114. At least a portion of the battery cell assembly 2 is located in the cavity 113. The connecting portion 111 is connected to the battery cell assembly 2 so that the connecting portion 111 bears at least a portion of the weight of the battery cell assembly 2 borne by the upper cover 3. This maximizes the distribution of the weight of the battery cell assembly 2 onto the frame 1, significantly reducing the risk of deformation or damage to the upper cover 3 due to excessive load. This makes the structural strength distribution of the battery pack 100 more reasonable and improves the reliability and service life of the electrical device 1000.

[0100] It should be noted that the "1000" limit for electrical equipment can be vehicles, aircraft, energy storage devices, computers, etc.

[0101] According to the embodiment of this application, the electrical device 1000 is provided with a battery pack 100, in which at least a portion of the battery cell group 2 is located in the cavity 113, and the connecting part 111 is connected to the battery cell group 2, so that the connecting part 111 bears at least a portion of the weight of the battery cell group 2 on the upper cover 3, thereby maximizing the distribution of the weight of the battery cell group 2 to the frame 1, significantly reducing the risk of deformation or damage to the upper cover 3 due to excessive load, making the structural strength distribution of the battery pack 100 more reasonable, and improving the reliability and service life of the electrical device 1000.

[0102] In some embodiments of this application, the electrical device 1000 is a vehicle, which includes a body and a frame body 11 connected to the body. Thus, when the battery pack 100 is applied to a vehicle, the battery pack 100 is connected to the vehicle via the frame body 11. At least a portion of the cell assembly 2 is located within the cavity 113, and the connecting portion 111 is connected to the cell assembly 2. This allows the connecting portion 111 to bear at least a portion of the weight of the cell assembly 2 on the upper cover 3, thereby maximizing the distribution of the weight of the cell assembly 2 onto the frame 1. This significantly reduces the risk of deformation or damage to the upper cover 3 due to excessive load, resulting in a more reasonable distribution of structural strength in the battery pack 100 and improving the reliability and service life of the vehicle.

[0103] In some embodiments of this application, the upper cover 3 serves as the base plate of the vehicle body. This arrangement creates an integrated structure between the battery pack 100 and the vehicle body, avoiding a separate arrangement and resulting in a simpler, smaller, and more compact vehicle structure. Furthermore, compared to a traditional CTB battery pack 100 (Cell to Body), this application increases the size of the frame 1 through the connecting portion 111, effectively enhancing the structural strength of the upper cover 3 and further improving the overall structural strength of the vehicle.

[0104] In the embodiments of this application, the vehicle body includes a frame, and the top cover 3 is connected to the frame by a fourth fastener. Thus, this arrangement further enhances the connection strength between the vehicle body and the battery pack 100, thereby improving the reliability of the vehicle.

[0105] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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 this application. 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.

[0106] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An upper cover assembly (10) for a battery pack (100), wherein, The battery pack (100) comprises: a frame (1), the frame (1) comprising a frame body (11), the frame body (11) being enclosed to form a cavity (113) provided with an opening (114), the frame body (11) having a connecting portion (111) extending towards the cavity (113), the connecting portion (111) being used for connecting a cell group (2) of the battery pack (100); an upper cover (3) connected to the upper side of the frame body (11) and closing the opening (114).

2. The upper cover assembly (10) of claim 1, wherein, The connecting portion (111) is a flange extending towards the cavity (113).

3. The upper cover assembly (10) according to any one of claims 1-2, wherein, The connecting portion (111) is located at the upper end of the frame body (11) and is attached to the upper cover (3).

4. The upper cover assembly (10) according to any one of claims 1-3, wherein, The cell group (2) comprises a plurality of cells (21), and the plurality of cells (21) are arranged along a first direction. The connecting portion (111) comprises a first sub-edge (1111), and the frame body (11) has the first sub-edge (1111) on two inner walls opposite in a second direction. The first sub-edge (1111) extends along the first direction, and two first sub-edges (1111) are oppositely arranged and respectively used for connecting two ends of each cell (21) along the second direction. The first direction and the second direction intersect.

5. The upper cover assembly (10) of claim 4, wherein, The connecting portion (111) further comprises a second sub-edge (1112), and the frame body (11) has the second sub-edge (1112) on two inner walls opposite in the first direction. The second sub-edge (1112) extends along the second direction, and two second sub-edges (1112) are respectively used for connecting the cells (21) located at two ends opposite in the first direction.

6. The upper cover assembly (10) of claim 4, wherein, The frame (1) further comprises an expansion beam (12) located in the frame body (11) and extending along the second direction. The expansion beam (12) is one or a plurality of expansion beams (12) spaced apart along the first direction.

7. The upper cover assembly (10) according to any one of claims 1-6, wherein, The upper cover (3) and the frame (1) are connected by a first fastener (81). And / or, the upper cover (3) and the frame (1) have a first sealant (43) therebetween.

8. A battery pack (100), wherein The battery pack (100) comprises: a cell group (2); The upper cover assembly (10) according to any one of claims 1-7, at least part of the cell group (2) is located in the cavity (113), and the connecting portion (111) is connected with the cell group (2).

9. The battery pack (100) of claim 8, wherein, The cell group (2) is connected with the upper cover (3).

10. The battery pack (100) according to claim 8 or 9, wherein The cell group (2) is adhesively connected with the connecting portion (111). And / or, the cell group (2) is adhesively connected with the upper cover (3).

11. The battery pack (100) according to any one of claims 8-10, wherein, Part of the upper cover (3) is recessed towards the cavity (113) to form a recessed portion (31), and the recessed portion (31) is connected with the cell group (2).

12. The battery pack (100) according to any one of claims 8-11, wherein, Further comprising: a structural adhesive (41) located above the cell group (2), and the upper cover (3) and the connecting portion (111) are both connected with the cell group (2) through the structural adhesive (41).

13. The battery pack (100) according to any one of claims 8-12, wherein, The lower surface of the frame body (11) is higher than the highest point of the pole of the battery cell (21) of the battery cell group (2).

14. The battery pack (100) according to any one of claims 8-13, wherein, Further comprising: A lower shell (5) comprising a shell body (51) and a first side plate (52), the shell body (51) is located below the battery cell group (2) and connected with the battery cell group (2), the first side plate (52) is arranged around the shell body (51) and encloses a first containing space (53), part of the battery cell group (2) is located in the first containing space (53), and one end of the first side plate (52) away from the shell body (51) is connected with the frame body (11).

15. The battery pack (100) of claim 14, wherein, The shell body (51) has a heat exchange channel.

16. The battery pack (100) according to claim 14 or 15, wherein Further comprising: A bottom guard plate (6) comprising a guard plate body (61) and a second side plate (62), the guard plate body (61) is located below the shell body (51), the second side plate (62) is arranged around the guard plate body (61) and encloses a second containing space (63), the lower shell (5) is located in the second containing space (63), and one end of the second side plate (62) away from the guard plate body (61) is connected with the frame body (11).

17. The battery pack (100) of claim 16, wherein, The frame body (11) has a first mounting hole (112) penetrating through the frame body (11) in the up-down direction, one end of the second side plate (62) away from the guard plate body (61) has a mounting edge (621), the mounting edge (621) has a second mounting hole (622) penetrating through the mounting edge (621) in the up-down direction, the first mounting hole (112) and the second mounting hole (622) are opposite and communicate, and the battery pack (100) further comprises: A lifting lug (7) penetrating through the first mounting hole (112) and the second mounting hole (622).

18. An electrical consumer (1000), wherein The battery pack (100) according to any one of claims 8-17.

19. The powered device (1000) of claim 18, wherein The power consumption device (1000) is a vehicle, the vehicle comprises a vehicle body, and the frame body (11) is connected with the vehicle body.

20. The powered device (1000) of claim 19, wherein, The upper cover (3) is a bottom plate of the vehicle body. The upper cover (3) is a bottom plate of the vehicle body.

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