Upper cover assembly, battery pack and electric equipment

Abstract

The utility model discloses an upper cover assembly, a battery pack and electric equipment, the upper cover assembly comprises a frame, the frame comprises a frame body, the frame body is enclosed to form a cavity with an opening, the frame body is provided with a connecting part extending towards the cavity, and the connecting part is used for connecting a battery cell group of the battery pack; the upper cover is connected to the upper portion of the frame body and seals the opening, and the connecting part bears at least part of the weight of the battery cell set borne by the upper cover, so that the weight of the battery cell set is distributed to the frame to the maximum extent, the deformation or damage risk caused by overlarge bearing of the upper cover is remarkably reduced, the structural strength distribution of the upper cover assembly is more reasonable, and the service life of the upper cover assembly is prolonged. And the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an upper cover assembly, a battery pack and an electrical equipment. Background Art

[0002] New energy vehicles generally include a vehicle body and a battery pack mounted on the vehicle body. The battery pack is not only the energy source of power, but also a key factor related to multiple aspects such as the performance, safety and endurance of the whole vehicle. However, in the prior art, since the upper cover of the battery pack serves as the vehicle floor or needs to bear a relatively large bearing capacity, the upper cover is prone to deformation or damage, affecting the safety and reliability of the battery pack and the vehicle. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an upper cover assembly, which significantly reduces the risk of deformation or damage of the upper cover caused by excessive load, makes the structural strength distribution of the upper cover assembly more reasonable, and improves the reliability and service life.

[0004] The utility model also provides a battery pack, which includes the above-mentioned upper cover assembly.

[0005] The utility model also provides an electrical equipment, which includes the above-mentioned battery pack.

[0006] The upper cover assembly according to the embodiment of the utility model is used for a battery pack, and is characterized by comprising: a frame, the frame includes a frame body, the frame body encloses a cavity with an opening, the frame body has a connecting portion extending towards the inside of the cavity, and the connecting portion is used for connecting the battery cell group of the battery pack; an upper cover, the upper cover is connected above the frame body and closes the opening.

[0007] For the upper cover assembly according to the embodiment of the utility model, the frame includes a frame body, a cavity with an opening is formed by enclosing the frame body, the frame body has a connecting portion extending towards the inside of the cavity, the connecting portion is used for connecting the battery cell group of the battery pack, the upper 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 group borne by the upper cover, thereby realizing maximizing the distribution of the weight of the battery cell group to the frame, significantly reducing the risk of deformation or damage of the upper cover caused by excessive load, making the structural strength distribution of the upper cover assembly more reasonable, and improving the reliability and service life.

[0008] In some embodiments of the utility model, the connecting portion is a flanging extending towards the inside of the cavity.

[0009] In some embodiments of the utility model, the connecting portion is located at the upper end of the frame body and is in contact with the upper cover.

[0010] In some embodiments of the present utility model, the battery cell group includes a plurality of battery cells, the plurality of battery cells are arranged along a first direction, the connecting portion includes a first sub-edge, the first sub-edge is provided on two inner walls of the frame body opposite to each other along a second direction, the first sub-edge extends along the first direction, the two first sub-edges are arranged opposite to each other and are respectively used for connecting with two ends of each battery cell along the second direction, wherein the first direction intersects with the second direction.

[0011] In some embodiments of the present utility model, the connecting portion further includes a second sub-edge, the two inner walls of the frame body opposite to each other along the first direction are provided with the second sub-edge, the second sub-edge extends along the second direction, and the two second sub-edges are respectively used for connecting with the battery cells located at two ends opposite to each other along the first direction.

[0012] In some embodiments of the present utility model, the frame further includes an expansion beam, the expansion beam is located inside the frame body and extends along the second direction, and the expansion beam is one or a plurality of spaced apart along the first direction.

[0013] In some embodiments of the present utility model, the upper cover and the frame are connected by a first fastener;

[0014] And / or, there is a first sealant between the upper cover and the frame.

[0015] The battery pack according to the embodiment of the present utility model includes: a battery cell group; the upper cover assembly as described above, at least part of the battery cell group is located in the cavity, and the connecting portion is connected to the battery cell group.

[0016] For the battery pack according to the embodiment of the present utility model, an upper cover assembly is provided. The frame includes a frame body, the frame body encloses a cavity with an opening, the frame body has a connecting portion extending towards the inside of the cavity, the upper cover is connected above the frame body and closes the opening. By arranging at least part of the battery cell group in the cavity and connecting the connecting portion to the battery cell group, the connecting portion bears at least part of the weight of the battery cell group borne by the upper cover, so as to maximize the distribution of the weight of the battery cell group to the frame, significantly reduce the risk of deformation or damage of the upper cover caused by excessive load, make the structural strength distribution of the battery pack more reasonable, and improve the reliability and service life.

[0017] In some embodiments of the present utility model, the battery cell group is connected to the upper cover.

[0018] In some embodiments of the present utility model, the battery cell group is adhesively connected to the connecting portion; and / or, the battery cell group is adhesively connected to the upper cover.

[0019] In some embodiments of the present invention, a portion of the upper cover is recessed toward the cavity to form a recessed portion, and the recessed portion is connected to the battery cell group.

[0020] Some embodiments of the present invention further include: structural adhesive, wherein the structural adhesive is located above the battery cell group, and the upper cover and the connecting portion are connected to the battery cell group through the structural adhesive.

[0021] In some embodiments of the present invention, the lower surface of the frame body is higher than the highest point of the pole of the battery cell of the battery cell group.

[0022] In some embodiments of the utility model, it also includes: a lower shell, the lower shell includes a shell body and a first side panel, the shell body is located below the battery cell group and connected to the battery cell group, the first side panel is arranged around the shell body and encloses to form a first accommodating space, part of the battery cell group is located in the first accommodating space, and the end of the first side panel facing away from the shell body is connected to the frame body.

[0023] In some embodiments of the present invention, a heat exchange channel is provided in the shell body.

[0024] In some embodiments of the utility model, it also includes: a bottom guard plate, the bottom guard plate includes a guard plate body and a second side plate, the guard plate body is located below the shell body, the second side plate is arranged around the guard plate body and encloses to form a second accommodating space, the lower shell is located in the second accommodating space, and the end of the second side plate facing away from the guard plate body is connected to the frame body.

[0025] In some embodiments of the utility model, the frame body has a first mounting hole that penetrates the frame body along the up-down direction, the end of the second side plate facing away from the guard plate body has a mounting edge, the mounting edge penetrates the second mounting hole of the mounting edge along the up-down direction, the first mounting hole and the second mounting hole are opposite and connected, and the battery pack also includes: a lifting ear, which is inserted into the first mounting hole and the second mounting hole.

[0026] The electric device according to the embodiment of the utility model includes the above-mentioned battery pack.

[0027] According to the electrical equipment of the embodiment of the utility model, a battery pack is provided, and at least a 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 a part of the weight of the battery cell group borne by the upper cover, thereby maximizing the distribution of the weight of the battery cell group to the frame, significantly reducing the risk of deformation or damage of the upper 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.

[0028] In some embodiments of the present utility model, the electrical equipment is a vehicle, the vehicle includes a vehicle body, and the frame body is connected to the vehicle body.

[0029] In some embodiments of the present utility model, the upper cover is the bottom plate of the vehicle body.

[0030] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0031] The above and / or additional aspects and advantages of the present utility model will become apparent and be easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0032] Figure 1 is a structural diagram of a battery pack according to an embodiment of the present utility model;

[0033] Figure 2 is an exploded view of a battery pack according to an embodiment of the present utility model;

[0034] Figure 3 is Figure 2 an enlarged view of part A in

[0035] Figure 4 is Figure 3 an enlarged view of part B in

[0036] Figure 5 a top view of a battery pack according to an embodiment of the present utility model;

[0037] Figure 6 is a cross-sectional view taken along line C-C in Figure 5 ;

[0038] Figure 7 is Figure 6 an enlarged view of part D in

[0039] Figure 8 is a structural diagram of a frame and a lug according to an embodiment of the present utility model.

[0040] Reference Signs:

[0041] 100, battery pack;

[0042] 1, frame; 11, frame body; 111, connecting portion; 1111, first sub-edge; 1112, second sub-edge; 112, first mounting hole; 12, expansion beam; 113, cavity;

[0043] 2, battery cell group; 21, battery cell;

[0044] 3, upper cover; 31, recessed portion;

[0045] 41. Structural adhesive; 42. Thermal conductive adhesive; 43. First sealant; 44. Second sealant;

[0046] 5. Lower housing; 51. Housing body; 52. First side plate; 53. First accommodation space;

[0047] 6. Bottom guard plate; 61. Guard plate body; 62. Second side plate; 621. Mounting edge; 622. Second mounting hole; 63. Second accommodation space;

[0048] 7. Lifting lug;

[0049] 81. First fastener; 82. Second fastener; 83. Third fastener. Detailed implementation manner

[0050] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0051] In the description of the present invention, 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. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0052] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The upper cover assembly according to an embodiment of the present invention will be described below with reference to the drawings.

[0054] As Figure 1 , Figure 2 , Figures 5 - 8 shown, the upper cover assembly according to an embodiment of the present utility model for a battery pack 100 includes a frame 1 and an upper cover 3.

[0055] Wherein, the frame 1 includes a frame body 11. The frame body 11 encloses a cavity 113 which is open. The frame body 11 has a connecting portion 111 extending towards the inside of the cavity 113. The connecting portion 111 is used for connecting the battery cell group 2 of the battery pack. The upper cover 3 is connected above the frame body 11 and closes the opening.

[0056] Thus, by the frame body 11 enclosing a cavity 113 which is open, a part of the battery cell group 2 can be located inside the cavity 113, effectively protecting the battery cell group 2 from external extrusion, impact and collision, reducing the risk of damage to the battery cell group 2. And by the upper cover 3 being connected above the frame body 11 and closing the opening, the sealing performance of the upper cover assembly is ensured, further improving the reliability of the battery pack 100 applying the upper cover assembly.

[0057] Meanwhile, by connecting the connecting portion 111 with the battery cell group 2, the connecting portion 111 is enabled to bear 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 more reasonable, and improving the reliability and service life. For example, when the battery pack 100 applying the upper cover assembly is applied to a vehicle and the vehicle encounters vibration and impact, the force received by the battery cell group 2 will be transmitted to the upper cover 3 and transmitted to the frame body 11 through the connecting portion 111. By the frame 1 sharing part of the force, the overall structural stability of the battery pack 100 is improved.

[0058] In addition, the battery cell group 2 is formed by stacking a plurality of battery cells 21. During the stacking process of the plurality of battery cells 21, the connecting portion 111 can play a certain supporting role for the battery cells 21, simplifying the assembly difficulty of the battery pack 100, improving the assembly efficiency, and reducing the cost.

[0059] Furthermore, the overlapping dimension between the connecting portion 111 and the battery cell group 2 is 50 mm. Thus, by such a setting, the effective connection between the connecting portion 111 and the battery cell group 2 is ensured, ensuring that the connecting portion 111 bears at least part of the weight of the battery cell group 2 borne by the upper cover 3, and improving the reliability of the battery pack 100.

[0060] Furthermore, both the upper and lower ends of the cavity 113 are open to form openings. The upper cover 3 is connected above the frame body 11 and closes the opening at the upper end of the cavity 113. Thus, through such a setting, the sealing performance at the upper end of the frame body 11 is ensured, thereby effectively protecting the battery cell group 2 and further improving the reliability of the battery pack 100 using this upper cover assembly.

[0061] For the battery pack 100 according to an embodiment of the present invention, the frame 1 includes a frame body 11. A cavity 113 with an open setting is formed by enclosing with the frame body 11. The frame body 11 has a connecting portion 111 extending towards the inside of 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, 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 realizing the maximum distribution of the weight of the battery cell group 2 to the frame 1, significantly reducing the risk of deformation or damage of the upper cover 3 due to excessive load-bearing, making the structural strength distribution of the upper cover assembly more reasonable, and improving the reliability and service life.

[0062] In some embodiments of the present invention, such as Figure 1 , Figure 2 , Figures 5 - 8 shown, the connecting portion 111 is a flanging extending towards the inside of the cavity 113. Thus, through such a setting, the flanging formed by the end of the frame body 11 close to the cavity 113 extending towards the inside of the cavity 113 is the connecting portion 111. The connecting portion 111 is part of the frame body 11, ensuring the structural strength of the connecting portion 111, thereby ensuring that the connecting portion 111 bears at least part of the weight of the battery cell group 2 borne by the upper cover 3 and improving the reliability of the upper cover assembly.

[0063] In some embodiments of the present invention, such as Figure 1 , Figure 2 , Figures 5 - 8 shown, the connecting portion 111 is located at the upper end of the frame body 11 and is in contact with the upper cover 3. It can be understood that since the upper cover 3 is located above the frame body 11 and is connected to the frame body 11, by the connecting portion 111 being located at the upper end of the frame body 11 and being in contact with the upper cover 3, the contact area between the upper cover 3 and the frame 1 is effectively increased, improving the reliability of their connection.

[0064] At the same time, by increasing the contact area between the upper cover 3 and the frame 1, the force can be transmitted between the upper cover 3 and the frame 1 in a larger range and more evenly, thereby effectively reducing local cracking or damage caused by stress concentration in the upper cover 3 or the frame 1, improving the structural reliability of the upper cover 3 and the frame 1, and further improving the reliability of the battery pack 100.

[0065] In addition, when the battery pack 100 applied to the upper cover assembly is applied to a vehicle, by improving the structural reliability of the upper cover 3 and the frame 1, the top strength of the battery pack 100 is effectively enhanced, thereby improving the overall structural strength of the vehicle and enhancing the safety and reliability of the vehicle.

[0066] Furthermore, the sum of the overlapping dimensions of the upper cover 3 and the frame body 11 and the overlapping dimensions of the upper cover 3 and the connecting portion 111 is 150 mm. Thus, by such a setting, the contact area between the upper cover 3 and the frame 1 is further increased, and the reliability of the battery pack 100 is improved.

[0067] In some embodiments of the present invention, as Figure 3 , Figure 4 , Figures 6 - 8 shown, the battery cell group 2 includes a plurality of battery cells 21, the plurality of battery cells 21 are arranged along a first direction, the connecting portion 111 includes a first sub-edge 1111, and the first sub-edge 1111 is provided on two inner walls of the frame body 11 opposite to each other along a second direction. The first sub-edge 1111 extends along the first direction, and the two first sub-edges 1111 are oppositely arranged and are respectively used for connecting with two ends of each battery cell 21 along the second direction, wherein the first direction, the second direction and the up-down direction intersect.

[0068] Thus, through such a setting, it is realized that two ends of each battery cell 21 along the second direction are respectively connected to the two first sub-edges 1111, so that the two sub-edges share the weight of each battery cell 21, ensuring that the weight of the battery cell group 2 is maximally distributed to the frame 1, and further improving the reliability of the battery pack 100. At the same time, during the process of stacking a plurality of battery cells 21 to form the battery cell group 2, by respectively arranging two ends of each battery cell 21 along the second direction opposite to the two first sub-edges 1111, so that two ends of each battery cell 21 along the second direction are lapped on the corresponding first sub-edge 1111, the assembly difficulty of the battery pack 100 is effectively reduced, the assembly efficiency is improved, and the cost is reduced.

[0069] In some embodiments of the present invention, as Figure 3 , Figure 4 , Figures 6 - 8 shown, the connecting portion 111 further includes a second sub-edge 1112, the two inner walls of the frame body 11 opposite to each other along the first direction have the second sub-edge 1112, the second sub-edge 1112 extends along the second direction, and the two second sub-edges 1112 are respectively used for connecting with the battery cells 21 located at two ends opposite to each other along the first direction.

[0070] Thus, through such an arrangement, the second sub-edge 1112 can further share the weight of the battery cell group 2, improving the reliability of the battery pack 100. At the same time, during the process of stacking multiple battery cells 21 to form the battery cell group 2, by using two second sub-edges 1112 to connect to the battery cells 21 located at opposite ends in the first direction respectively, the assembly difficulty of the battery pack 100 is further reduced, the assembly efficiency is improved, and the cost is reduced.

[0071] In some embodiments of the present invention, as Figure 8 shown, the frame 1 further includes an expansion beam 12. The expansion beam 12 is located within the frame body 11 and extends along the second direction. The expansion beam 12 is one or a plurality spaced apart along the first direction, and at least one side of the expansion beam 12 along the first direction is provided with a battery cell 21.

[0072] It can be understood that both the expansion beam 12 and the battery cell 21 extend along the second direction. By providing the battery cell 21 on at least one side of the expansion beam 12 along the first direction, the expansion beam 12 can effectively fix and position the battery cell 21, ensuring the stable position of the battery cell 21 within the battery pack 100. And when the battery cell 21 generates a certain amount of expansion during charging and discharging, the expansion beam 12 can withstand this expansion force, preventing the battery cell 21 from being damaged or causing safety problems due to excessive expansion, thereby improving the reliability and safety of the battery pack 100.

[0073] At the same time, by having the expansion beam 12 as one or a plurality 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 to adapt to different application scenarios and improve versatility.

[0074] In some specific embodiments, as Figure 7 and Figure 8As shown, the frame 1 of the present application only includes a frame body 11 and an expansion beam 12, and the frame body 11 is connected to the vehicle body. Thus, the frame body 11 plays a certain protective role for the battery cell group 2, effectively preventing the battery cell group 2 from being externally squeezed, impacted, and collided, reducing the risk of damage to the battery cell group 2. And the inner wall of the frame body 11 has a connecting portion 111 extending towards the inside of the frame body 11 to bear at least part of the weight of the upper cover 3 bearing the battery cell group 2, and increasing the contact area between the upper cover 3 and the frame 1, improving the structural reliability of the upper cover 3 and the frame 1. Then, the expansion beam 12 fixes and positions the battery cells 21 and bears the expansion force of the battery cells 21, so that the frame 1 only retains the main stressed frame part of the battery pack 100. While making the structural strength distribution of the battery pack 100 more reasonable and the battery pack 100 retain high strength, the structure of the frame 1 is simplified, and the mounting 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 levels. The structure between components is simple, reducing a lot of local additional strengthening processes and effectively reducing costs.

[0075] The battery pack 100 of the embodiment of the present utility model will be described below.

[0076] The battery pack 100 according to the embodiment of the present utility model, as Figure 1 、 Figure 2 、 Figures 5 - 8 shown, includes a battery cell group 2 and an upper cover assembly. At least part of the battery cell group 2 is located in the cavity 113, and the connecting portion 111 is connected to the battery cell group 2.

[0077] Thus, by allowing part of the battery cell group 2 to be located in the cavity 113, the protection of the battery cell group 2 is realized, effectively preventing the battery cell group 2 from being externally squeezed, impacted, and collided, reducing the risk of damage to the battery cell group 2. And by connecting the upper cover 3 above the frame body 11 and closing the opening, the sealing performance of the upper cover assembly is ensured, further improving the reliability of the battery pack 100 using this upper cover assembly.

[0078] At the same time, by connecting the connecting portion 111 to the battery cell group 2, the connecting portion 111 bears at least part of the weight of the upper cover 3 bearing the battery cell group 2, so as to maximize 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-bearing, making the structural strength distribution of the upper cover assembly more reasonable, and improving the reliability and service life. For example, when the battery pack 100 is applied to a vehicle and the vehicle encounters vibration and impact, the force received by the battery cell group 2 will be transmitted to the upper cover 3 and through the connecting portion 111 to the frame body 11. By the frame 1 sharing part of the force, the overall structural stability of the battery pack 100 is improved.

[0079] In addition, the battery cell group 2 is formed by stacking a plurality of battery cells 21. During the stacking process of the plurality of battery cells 21, the connecting portion 111 can play a certain supporting role for the battery cells 21, simplify the assembly difficulty of the battery pack 100, improve the assembly efficiency, and reduce the cost.

[0080] For the battery pack 100 according to an embodiment of the present invention, the frame 1 includes a frame body 11. The frame body 11 encloses a cavity 113 with an opening. The frame body 11 has a connecting portion 111 extending toward the inside of the cavity 113. The upper cover 3 is connected above the frame body 11 and closes the opening. At least a part of the battery cell group 2 is located in the cavity 113, and the connecting portion 111 is connected to the battery cell group 2, 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 realizing the maximization of distributing the weight of the battery cell group 2 to the frame 1, significantly reducing the risk of deformation or damage of 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.

[0081] In some embodiments of the present invention, such as Figure 1 , Figure 2 , Figures 5 - 8 shown, the battery cell group 2 is connected to the upper cover 3. Thus, through such a setting, the force of the battery cell group 2 can be better transmitted to the upper cover 3, improving the overall reliability.

[0082] In some embodiments of the present invention, such as Figure 2 , Figure 3 and Figure 7 shown, the battery pack 100 further includes a structural adhesive 41. Among them, the structural adhesive 41 is located above the battery cell group 2, and both the upper cover 3 and the connecting portion 111 are connected to the battery cell group 2 through the structural adhesive 41. Thus, the upper cover 3 is adhesively connected to the battery cell group 2 and the connecting portion 111 is adhesively connected to the battery cell group 2 through the structural adhesive 41, and good sealing performance between the upper cover 3 and the battery cell group 2 and between the connecting portion 111 and the battery cell group 2 is achieved through the structural adhesive 41, improving the sealing effect of the battery pack 100. In addition, during the assembly process of the battery pack 100, the setting of the structural adhesive 41 can reduce the assembly difficulty and improve the assembly efficiency.

[0083] In some embodiments of the present invention, the battery cell group 2 is adhesively connected to the connecting portion 111. Thus, the connection between the battery cell group 2 and the connecting portion 111 is realized through such a setting, so that the weight of the battery cell group 2 can be shared by the frame 1, improving the reliability. At the same time, the battery cell group 2 and the connecting portion 111 have good sealing performance through the adhesive connection, improving the sealing effect of the battery pack 100. In addition, during the assembly process of the battery pack 100, the adhesive connection between the battery cell group 2 and the connecting portion 111 can reduce the assembly difficulty and improve the assembly efficiency.

[0084] In some embodiments of the present utility model, the battery cell group 2 is adhesively connected to the upper cover 3. Thus, through such a setting, the connection between the battery cell group 2 and the upper cover 3 is achieved, effectively preventing the battery cell group 2 from shifting or loosening when subjected to external forces or vibrations, and improving reliability. At the same time, the battery cell group 2 and the upper cover 3 have good sealing performance through adhesive connection, improving the sealing effect of the battery pack 100. In addition, during the assembly process of the battery pack 100, the adhesive connection between the battery cell group 2 and the upper cover 3 can reduce the assembly difficulty and improve the assembly efficiency.

[0085] In some embodiments of the present utility model, such as Figure 2 , Figure 3 and Figure 7 shown, a 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 to the battery cell group 2. It can be understood that since the upper cover 3 is located above the frame body 11 and connected to the frame body 11, the connecting portion 111 is located at the upper end of the frame body 11 and fits with the upper cover 3, and the connecting portion 111 is connected to the battery cell group 2. The recessed portion 31 is used to avoid the connecting portion 111, so that the upper cover 3 and the battery cell group 2 can fit better, improving the connection strength between the two and the force transmission, reducing stress concentration, and improving the overall reliability of the battery pack 100.

[0086] In some embodiments of the present utility model, such as Figure 2 , Figure 3 and Figure 7 shown, there is a first sealant 43 between the upper cover 3 and the frame 1. Thus, the gap between the upper cover 3 and the frame 1 is sealed by the first sealant 43, effectively preventing dust, moisture or other contaminants from entering the interior of the battery pack 100 through the gap between the upper cover 3 and the frame 1, and improving the reliability of the battery pack 100.

[0087] In some embodiments of the present utility model, such as Figure 7 shown, the upper cover 3 and the frame 1 are connected by a first fastener 81. Thus, through such a setting, the connection between the upper cover 3 and the frame 1 is achieved, and the reliability of their connection is ensured.

[0088] In some embodiments of the present utility model, such as Figure 7 shown, the lower surface of the frame body 11 is higher than the highest point of the pole columns of the battery cells 21 of the battery cell group 2.

[0089] It is understandable that when the battery pack 100 is applied to a vehicle, the battery cell group 2 is located inside the frame body 11 and below the connection portion 111. In the process of stacking multiple battery cells 21 to form the battery cell group 2, the connection portion 111 can be located below the battery cell group 2, so that multiple battery cells 21 can be directly stacked on the inside of the frame body 11. At the same time, by making the lower surface of the frame body 11 higher than the highest point of the pole of the battery cell 21 of the battery cell group 2, so that the frame body 11 will not block the pole side of the battery cell 21, such as the connection piece welding, the collector welding, the protective cover assembly and other pole side process operations, the process route is optimized, and it is ensured that multiple battery cells 21 can be directly stacked on the inside of the frame body 11, reducing the difficulty of assembly and improving the assembly efficiency.

[0090] Compared with the prior art, the position of the frame blocks the operation of the pole side process, resulting in the inability to stack the battery cells in the tray and only the inverted process can be used, thereby increasing the complexity of the process and easily introducing foreign matter such as aluminum filings into the spaces between the battery cells, resulting in an increase in the defective rate of the battery pack. The battery pack 100 of the present application has the lower surface of the frame body 11 higher than the highest point of the pole of the battery cell 21 of the battery cell group 2, so that multiple battery cells 21 can be stacked directly on the inner side of the frame body 11 without the need to use the tray inverted method, reducing the risk of the tray hitting the battery cell group 2 when inverted, and also avoiding the risk of foreign matter such as aluminum filings entering between the battery cells 21 when inverted, thereby improving the yield of the battery pack 100 and reducing the safety risk of the battery pack 100.

[0091] In some embodiments of the present invention, Figure 2 , Figure 3 and Figure 7 As shown, the battery pack 100 further includes a lower shell 5. The lower shell 5 includes a shell body 51 and a first side plate 52, wherein the shell body 51 is located below the battery cell group 2 and connected to the battery cell group 2, the first side plate 52 is arranged around the shell body 51 and encloses to form a first accommodating space 53, a portion of the battery cell group 2 is located in the first accommodating space 53, and an end of the first side plate 52 facing away from the shell body 51 is connected to the frame body 11.

[0092] It can be understood that, by the shell body 51 being located below the battery cell group 2 and connected to the battery cell group 2, the lower shell 5 fixes the battery cell group 2, thereby improving the reliability of the battery pack 100. At the same time, the first side plate 52 is arranged around the shell body 51 and encloses the first accommodating space 53, and part of the battery cell group 2 is located in the first accommodating space 53, thereby playing a certain protective role for the battery cell group 2, effectively preventing the battery cell group 2 from being squeezed, impacted and collided from the outside, reducing the risk of damage to the battery cell group 2, and further improving the reliability of the battery pack 100. In addition, by connecting the end of the first side plate 52 away from the shell body 51 to the frame body 11, the stability and safety of the overall structure of the battery pack 100 are further improved.

[0093] In some embodiments of the present invention, the shell body 51 has a heat exchange channel, so that the shell body 51 can be used as a cooling plate to cool the battery cell group 2. It should be noted that the shell body 51 has a heat exchange channel, which is known to ordinary technicians in the field and will not be described in detail here.

[0094] Furthermore, the battery cell group 2 and the shell body 51 are bonded and connected by the thermal conductive adhesive 42. Thus, the thermal conductive adhesive 42 ensures that the battery cell group 2 and the shell body 51 are connected, and the heat generated by the battery cell group 2 can be quickly and evenly transferred to the shell body 51, further enhancing the cooling effect of the battery cell group 2.

[0095] Optionally, the lower shell 5 is an integral piece formed by integral stamping, thereby improving the overall structural strength of the lower shell 5 .

[0096] In some embodiments of the present invention, Figure 2 , Figure 3 and Figure 7 As shown, there is a second sealant 44 between the first side plate 52 and the frame 1. Thus, the gap between the first side plate 52 and the frame 1 is sealed by the second sealant 44, effectively preventing dust, moisture or other contaminants from entering the interior of the battery pack 100 through the gap between the first side plate 52 and the frame 1, thereby improving the reliability of the battery pack 100.

[0097] In some embodiments of the present invention, Figure 7 As shown, the first side plate 52 and the frame 1 are connected by a second fastener 82. Thus, the connection between the first side plate 52 and the frame 1 is achieved through such an arrangement, and the reliability of the connection between the two is ensured.

[0098] In some embodiments of the present invention, Figure 2 , Figure 3 and Figure 7 As shown, the battery pack 100 further includes a bottom guard plate 6. The bottom guard plate 6 includes a guard plate body 61 and a second side plate 62. The guard plate body 61 is located below the battery cell group 2. The second side plate 62 is arranged around the guard plate body 61 and encloses a second accommodating space 63. Part of the lower shell 5 is located in the second accommodating space 63. The end of the second side plate 62 facing away from the guard plate body 61 is connected to the frame body 11.

[0099] Thus, a second accommodation space 63 is formed by surrounding the guard plate body 61 and the second side plate 62, and a part of the lower housing 5 is located in the second accommodation space 63, thereby playing a certain protective role for the lower housing 5 and the battery cell group 2, preventing the lower housing 5 from being physically damaged by mechanical impacts, scratches, collisions, etc., and further preventing the battery cell group 2 from being externally squeezed, impacted and collided, reducing the risk of damage to the battery cell group 2, and further improving the reliability of the battery pack 100. In addition, by connecting one end of the second side plate 62 facing away from the guard plate body 61 to the frame body 11, the stability and safety of the overall structure of the battery pack 100 are further improved.

[0100] In some embodiments of the present invention, as Figure 7 shown, the second side plate 62 and the frame 1 are connected by a third fastener 83. Thus, through such a setting, the connection between the first side plate 52 and the frame 1 is realized, and the reliability of the connection between the two is ensured.

[0101] In some embodiments of the present invention, as Figure 3 、 Figure 7 and Figure 8 shown, the frame body 11 has a first mounting hole 112 penetrating the frame body 11 in the up and down direction, one end of the second side plate 62 facing away from the guard plate body 61 has a mounting edge 621, the mounting edge 621 has a second mounting hole 622 penetrating the mounting edge 621 in the up and down direction, the first mounting hole 112 and the second mounting hole 622 are opposite and communicate with each other, and the battery pack 100 further includes a lifting lug 7, and the lifting lug 7 is inserted into the first mounting hole 112 and the second mounting hole 622.

[0102] It can be understood that when the battery pack 100 is applied to a vehicle, the connection between the battery pack 100 and the vehicle body is realized through the lifting lug 7. Thus, by inserting the lifting lug 7 into 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 connection between the bottom guard plate 6 and the vehicle body are realized, thereby ensuring the connection reliability between the battery pack 100 and the vehicle body.

[0103] At the same time, since the battery cell group 2 is located inside the frame body 11 and below the connecting portion 111, a part of the battery cell group 2 is located in the second accommodation space 63 of the bottom guard plate 6, and the frame body 11 is located above the mounting edge 621, so that the lifting 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 at the top. At this time, the battery pack 100 only receives the vertical force of the vehicle body, reducing the force transmission path, which is more conducive to improving the overall vehicle stiffness and lateral extrusion ability.

[0104] Further, there are multiple lifting lugs 7, multiple first mounting holes 112 corresponding to the lifting lugs 7 one by one, and multiple second mounting holes 622 corresponding to the lifting lugs 7 one by one. Thus, the connection strength between the battery pack 100 and the vehicle body is further improved through the multiple lifting lugs 7, and the overall reliability is enhanced.

[0105] The electrical equipment of the embodiments of the present invention will be described below.

[0106] The electrical equipment according to the embodiments of the present invention includes a battery pack 100. The frame 1 includes a frame body 11. The frame body 11 encloses a cavity 113 with an opening. The frame body 11 has a connecting portion 111 extending towards the inside of the cavity 113. The upper cover 3 is connected above the frame body 11 and closes the opening. At least part of the battery cell group 2 is located in the cavity 113, and the connecting portion 111 is connected to the battery cell group 2, 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 realizing the maximum distribution of the weight of the battery cell group 2 to the frame 1, significantly reducing the risk of deformation or damage of 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 equipment.

[0107] It should be noted that the electrical equipment is not limited here and can be a vehicle, an aircraft, an energy storage device, a computer, etc.

[0108] For the electrical equipment according to the embodiments of the present invention, a battery pack 100 is provided. At least part of the battery cell group 2 is located in the cavity 113, and the connecting portion 111 is connected to the battery cell group 2, 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 realizing the maximum distribution of the weight of the battery cell group 2 to the frame 1, significantly reducing the risk of deformation or damage of 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 equipment.

[0109] In some embodiments of the present invention, the electrical equipment is a vehicle, and the vehicle includes a vehicle body, and the frame body 11 is connected to the vehicle body. Thus, when the battery pack 100 is applied to a vehicle, the connection between the battery pack 100 and the vehicle is realized through the connection between the frame body 11 and the vehicle body. At least part of the battery cell group 2 is located in the cavity 113, and the connecting portion 111 is connected to the battery cell group 2, 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 realizing the maximum distribution of the weight of the battery cell group 2 to the frame 1, significantly reducing the risk of deformation or damage of 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 vehicle.

[0110] In some embodiments of the present utility model, the upper cover 3 is the bottom plate of the vehicle body. Thus, through such a setting, an integrated setting of the battery pack 100 and the vehicle body is formed, thereby avoiding the separate setting of the battery pack 100 and the vehicle body, and making the vehicle structure simple, the size smaller and more compact. At the same time, compared with the traditional CTB battery pack 100 (Cell to Body), in this application, the size of the frame 1 is increased through the connecting portion 111, thereby effectively enhancing the structural strength of the upper cover 3 and further improving the structural strength of the whole vehicle.

[0111] Further, the vehicle body includes a vehicle frame, and the upper cover 3 is connected to the vehicle frame through a fourth fastener. Thus, through such a setting, the connection strength between the vehicle body and the battery pack 100 is further realized, and the reliability of the vehicle is improved.

[0112] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0113] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An upper cover assembly for a battery pack (100), characterized in that, Comprising: A frame (1), the frame (1) includes a frame body (11), the frame body (11) encloses to form a cavity (113) with an opening, the frame body (11) has a connecting portion (111) extending towards the inside of the cavity (113), and the connecting portion (111) is used to connect the battery cell group (2) of the battery pack (100); An upper cover (3), the upper cover (3) is connected above the frame body (11) and closes the opening.

2. The upper cover assembly according to claim 1, wherein, The connecting portion (111) is a flanging extending towards the inside of the cavity (113).

3. The upper cover assembly according to claim 1, characterized in that, The connecting portion (111) is located at the upper end of the frame body (11) and fits with the upper cover (3).

4. The upper cover assembly according to claim 1, characterized in that, The battery cell group (2) includes a plurality of battery cells (21), the plurality of battery cells (21) are arranged along a first direction, the connecting portion (111) includes a first sub-edge (1111), the first sub-edge (1111) is provided on two inner walls of the frame body (11) opposite to each other along a second direction, the first sub-edge (1111) extends along the first direction, and the two first sub-edges (1111) are oppositely arranged and are respectively used to connect with two ends of each battery cell (21) along the second direction. Wherein, the first direction and the second direction intersect.

5. The upper cover assembly according to claim 4, characterized in that The connecting portion (111) further includes a second sub-edge (1112), the second sub-edge (1112) is provided on two inner walls of the frame body (11) opposite to each other along the first direction, the second sub-edge (1112) extends along the second direction, and the two second sub-edges (1112) are respectively used to connect with the battery cells (21) located at two ends opposite to each other along the first direction.

6. The upper cover assembly according to claim 4, characterized in that The frame (1) further includes an expansion beam (12), the expansion beam (12) is located inside the frame body (11) and extends along the second direction, and the expansion beam (12) is one or a plurality spaced apart along the first direction.

7. The upper cover assembly according to claim 1, characterized in that The upper cover (3) and the frame (1) are connected by a first fastener (81); And / or, there is a first sealant (43) between the upper cover (3) and the frame (1).

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

9. The battery pack according to claim 8, characterized in that, The battery cell group (2) is connected to the upper cover (3).

10. The battery pack according to claim 9, characterized in that, The battery cell group (2) is adhesively connected to the connecting portion (111); And / or, the battery cell group (2) is adhesively connected to the upper cover (3).

11. The battery pack according to claim 9, wherein, A 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 to the battery cell group (2).

12. The battery pack according to claim 8, wherein, Further comprising: A structural adhesive (41), the structural adhesive (41) is located above the battery cell group (2), and both the upper cover (3) and the connecting portion (111) are connected to the battery cell group (2) through the structural adhesive (41).

13. The battery pack according to claim 8, characterized in that, The lower surface of the frame body (11) is higher than the highest point of the pole columns of the battery cells (21) of the battery cell group (2).

14. The battery pack according to claim 8, wherein, Further comprising: 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 the battery cell group (2) and is connected to the battery cell group (2), the first side plate (52) is disposed around the housing body (51) and encloses a first accommodation space (53), a part of the battery cell group (2) is located in the first accommodation space (53), and one end of the first side plate (52) facing away from the housing body (51) is connected to the frame body (11).

15. The battery pack according to claim 14, wherein, The housing body (51) has a heat exchange flow channel therein.

16. The battery pack according to claim 14, wherein It further includes: Bottom guard plate (6), the bottom guard plate (6) includes a guard plate body (61) and a second side plate (62), the guard plate body (61) is located below the housing body (51), the second side plate (62) is disposed around the guard plate body (61) and encloses a second accommodation space (63), the lower housing (5) is located in the second accommodation space (63), and one end of the second side plate (62) facing away from the guard plate body (61) is connected to the frame body (11).

17. The battery pack according to claim 16, characterized in that, The frame body (11) has a first mounting hole (112) penetrating through the frame body (11) in the up and down direction, one end of the second side plate (62) facing 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 and down direction, the first mounting hole (112) and the second mounting hole (622) are opposite and communicate with each other, and the battery pack further includes: Lifting lug (7), the lifting lug (7) is inserted into the first mounting hole (112) and the second mounting hole (622).

18. An electrical device, characterized in that, It includes the battery pack according to any one of claims 8-17.

19. The electrical equipment according to claim 18, wherein The electrical equipment is a vehicle, the vehicle includes a vehicle body, and the frame body (11) is connected to the vehicle body.

20. The electrical device according to claim 19, characterized in that, The upper cover (3) is the bottom plate of the vehicle body.

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