Battery pack and electric equipment

Abstract

The utility model relates to a battery pack and electric equipment, and relates to the technical field of power batteries. The battery pack comprises a frame body, a cold plate and at least one separation beam, wherein the frame body is provided with a containing cavity. And the separation beam is arranged in the accommodating cavity. The cold plate is directly or indirectly connected with the frame body, at least one protrusion is arranged on the outer wall of the cold plate, and the protrusion and the cold plate are integrally arranged. Wherein the protrusions are connected with the partition beams, and the cold plate is arranged on one side of the frame body. According to the battery pack provided by the invention, the problem that the cold plate and the battery cells are easily damaged when the cold plate and the mounting beam are connected through welding can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and more particularly, to a battery pack and an electrical device using the same. Background Art

[0002] During the assembly of a battery pack, it is necessary to pre-define an installation area within the battery pack housing by means of installation beams or the like, and then place the battery components within the installation area.

[0003] In the related art, when the battery cells are arranged in an inverted manner, the installation beams need to be welded to the cold plate to enclose the installation area of the battery components. Since there are flow channels provided within the cold plate, the wall thickness of the cold plate is relatively thin. When the installation beam is welded to the cold plate, it is easy to penetrate the cold plate and cause damage to the cold plate, and the heat generated during welding is also likely to cause deformation of the cold plate. At the same time, burrs are likely to remain at the welding position between the installation beam and the cold plate, which can easily pierce the battery cells. Summary of the Utility Model

[0004] The purpose of the present application is to provide a battery pack and an electrical device using the same, which can solve the problem that the cold plate and the installation beam are easily damaged during the welding connection.

[0005] To achieve the above object, according to the first aspect of the present application, an embodiment of the present application provides a battery pack, which includes a housing, a cold plate, and at least one partition beam. The housing has a receiving cavity. The partition beam is disposed within the receiving cavity. The cold plate is directly or indirectly connected to the housing. At least one protrusion is provided on the outer wall of the cold plate, and the protrusion is integrally provided with the cold plate. Wherein, the protrusion is connected to the partition beam, and the cold plate is disposed on one side of the housing.

[0006] Based on the above embodiment of the present application, by integrally forming a protrusion on the cold plate and connecting the protrusion to the partition beam when connecting the cold plate and the partition beam, at this time, the protrusion and the partition beam can be directly welded without worrying about piercing the cold plate. At the same time, the welding position between the protrusion and the partition beam is far from the battery cells, and the two are connected to form a planar structure, and the burrs formed by welding are also easier to clean. Compared with the prior art of directly welding the cold plate and the partition beam, the probability of the burrs generated by welding piercing the battery cells is reduced.

[0007] In some embodiments, the protrusion is welded or bolted to the partition beam.

[0008] Based on the above embodiment of the present application, by providing a protrusion on the cold plate, at this time, the protrusion and the partition beam can be directly welded, which solves the problem of easy damage to the cold plate during welding while ensuring the processing and assembly efficiency. Or the protrusion and the partition beam are bolted together, which can also ensure sufficient connection strength while ensuring the assembly efficiency.

[0009] In some embodiments, at least one of the partition beams divides the accommodation cavity into at least two accommodation sub-cavities for accommodating the battery cells.

[0010] Based on the above embodiments of the present application, during the assembly of the battery cells, the partition beam and the frame cooperate to form the accommodation sub-cavity for accommodating the battery cells, and the partition beam and the frame simultaneously limit the battery cells, making the overall internal structure of the battery pack more orderly and stable, and improving the overall safety of the battery pack.

[0011] In some embodiments, the partition beam includes at least one longitudinal beam, the extending direction of the longitudinal beam is the same as that of the protrusion, the frame and the longitudinal beam enclose the accommodation sub-cavity, and the protrusion is fixedly connected to the longitudinal beam.

[0012] Based on the above embodiments of the present application, when the partition beam is provided as at least one longitudinal beam, the protrusion and the longitudinal beam are connected to each other at this time, so as to realize the connection between the longitudinal beam and the cold plate.

[0013] In some embodiments, the partition beam includes at least one cross beam, the extending direction of the cross beam intersects with that of the protrusion, the cross beam and the protrusion enclose the accommodation sub-cavity, and the protrusion is snap-connected and welded to the cross beam.

[0014] Based on the above embodiments of the present application, when the partition beam is provided as at least one cross beam, the extending direction of the protrusion intersects with that of the cross beam. At this time, the protrusion plays the role of replacing the original longitudinal beam, so as to cooperate with the cross beam to enclose the accommodation sub-cavity. The two are quickly and fixedly connected through snap connection, and the welding connection can further improve the strength at the connection interface between the two.

[0015] In some embodiments, at least one first snap groove is formed on the cross beam, at least one second snap groove is formed on the protrusion, and the second snap groove is snap-connected to the first snap groove.

[0016] Based on the above embodiments of the present application, by providing the first snap groove and the second snap groove, during assembly, the cross beam and the protrusion can be quickly positioned and snap-connected through the positions of the snap grooves, and at the same time, the heights on both sides of the two can be ensured to be flush, which is convenient for the assembly of components such as the bottom guard plate while reducing the occupation of the internal space of the battery pack.

[0017] In some embodiments, the partition beam includes at least one cross beam and at least one longitudinal beam, the extending direction of the longitudinal beam is the same as that of the protrusion, the cross beam intersects with the longitudinal beam, the cross beam and the longitudinal beam cooperate with the frame to enclose the accommodation sub-cavity, the protrusion is fixedly connected to the longitudinal beam, and the protrusion is snap-connected and welded to the cross beam.

[0018] Based on the above-mentioned embodiments of the present application, when the partition beam includes both a transverse beam and a longitudinal beam, the transverse beam and the longitudinal beam cooperate to enclose a receiving subcavity, and the longitudinal beam is fixed to the protrusion to achieve connection with the cold plate.

[0019] In some embodiments, at least one first snap-in groove is respectively formed on both sides of the cross beam facing the cold plate and away from the cold plate, and at least one of the protrusion and the longitudinal beam is formed with a second snap-in groove, and the first snap-in groove and the second snap-in groove are snap-connected.

[0020] Based on the above-mentioned embodiments of the present application, the protrusions and the longitudinal beams are respectively arranged on both sides of the cross beam, and the protrusions and the longitudinal beams are fixedly connected, thereby realizing the connection between the cold plate and the longitudinal beams and strengthening the connection between the cold plate and the partition beams.

[0021] In some embodiments, a supporting member is provided on the side of the partition beam away from the cold plate, and the supporting member is used to support the battery cell. The supporting member includes a connecting portion and a supporting portion, the connecting portion is provided on the side of the partition beam away from the cold plate, the supporting portion is provided at one end of the connecting portion away from the cold plate, and the extending direction of the supporting portion is perpendicular to the extending direction of the connecting portion, the battery cell is located between the supporting portion and the cold plate, and the connecting portion is fixedly connected to the partition beam. Alternatively, the connecting portion is detachably connected to the partition beam.

[0022] Based on the above-mentioned embodiments of the present application, when the battery cell is inverted, the cold plate is located on the upper part of the battery pack and the battery cell is located below the cold plate. By providing a supporting member, the supporting member is connected to the bottom of the protrusion. At this time, the battery cell is located between the supporting member and the cold plate, so that the battery cell is supported and fixed, thereby improving the stability of the battery cell during installation when the battery cell is inverted.

[0023] According to a second aspect of the present application, an electrical device is provided, wherein the electrical device comprises the above-mentioned battery pack.

[0024] Based on the above-mentioned embodiments of the present application, the electrical equipment provided by the present application also has the above-mentioned technical effects, which will not be described again here to avoid repetition.

[0025] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application but do not constitute a limitation to the present application. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the structure of the battery pack provided in an embodiment of the present application.

[0028] Figure 2 It is an explosion schematic diagram of the battery pack provided by the embodiment of the present application.

[0029] Figure 3 Is Figure 2 An enlarged schematic diagram of part A in

[0030] Figure 4 It is a schematic structural diagram of the cold plate in the battery pack provided by the embodiment of the present application.

[0031] Figure 5 It is a schematic cross-sectional view of the cold plate in the battery pack provided by the embodiment of the present application.

[0032] Figure 6 It is another schematic cross-sectional view of the cold plate in the battery pack provided by the embodiment of the present application.

[0033] Figure 7 It is a schematic structural diagram of the partition beam and the protrusion in the battery pack provided by the embodiment of the present application.

[0034] Figure 8 It is the second schematic structural diagram of the partition beam and the protrusion in the battery pack provided by the embodiment of the present application.

[0035] Figure 9 It is the third schematic structural diagram of the partition beam and the protrusion in the battery pack provided by the embodiment of the present application.

[0036] Figure 10 It is the fourth schematic structural diagram of the partition beam and the protrusion in the battery pack provided by the embodiment of the present application.

[0037] Figure 11 Is Figure 10 An enlarged schematic diagram of part B in

[0038] Explanation of reference numerals

[0039] 1. Frame; 11. Accommodation cavity; 111. Sub-accommodation cavity; 2. Partition beam; 21. Longitudinal beam; 211. Second clamping groove; 22. Cross beam; 221. First clamping groove; 3. Cold plate; 31. Sub-cold plate; 32. Flow channel; 4. Protrusion; 5. Support member; 51. Connection part; 52. Support part; 53. Insulation layer; 6. Battery cell; 7. Bottom protection plate; 8. Connecting piece. Detailed implementation manners

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. The components of the embodiments of this application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts fall within the scope of protection of this application.

[0043] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] In the description of this application, it should be noted that unless otherwise stated, the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing this application 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 therefore should not be construed as a limitation of this application. In addition, terms such as "first" and "second" are only used for differential description and should not be construed as indicating or implying relative importance.

[0045] In the description of this application, it should also be noted that unless otherwise clearly defined and limited, the terms "set" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In the related art, when the battery cell is arranged upside down, the battery cooling plate is located at the top of the battery pack at this time. At this time, it is necessary to weld and install a beam on the battery cooling plate. However, since the wall of the battery cooling plate is relatively thin, it is easy to weld through the wall of the battery cooling plate when welding the installation beam. The heat generated by welding is also likely to cause deformation of the battery cooling plate. At the same time, burrs are likely to be generated at the position where the installation beam is welded to the battery cooling plate. And since the connection position between the installation beam and the battery cooling plate is a right-angle structure, the burrs are not easy to clean and are likely to pierce the battery cell.

[0047] To solve the above problems, embodiments of the present application provide an electrical device using a battery pack as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric aircraft toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0048] Referring Figures 1 to 11 As shown in [reference], embodiments of the present application provide a battery pack. The battery pack includes a frame body 1, a cold plate 3, and at least one partition beam 2. The frame body 1 has a receiving cavity 11. The partition beam 2 is disposed in the receiving cavity 11. The cold plate 3 is directly or indirectly connected to the frame body 1. At least one protrusion 4 is disposed on the outer wall of the cold plate 3, and the protrusion 4 is integrally formed with the cold plate 3. Among them, the protrusion 4 is connected to the partition beam 2, and the cold plate 3 is disposed on one side of the frame body 1.

[0049] Based on the above embodiments of the present application, by integrally forming the protrusion 4 on the cold plate 3 and connecting the protrusion 4 to the partition beam 2 when connecting the cold plate 3 and the partition beam 2, at this time, the protrusion 4 and the partition beam 2 can be directly welded without worrying about welding through the cold plate 3. At the same time, the welding position between the protrusion 4 and the partition beam 2 is far from the battery cell 6, and the two are connected to form a planar structure, and the burrs formed by welding are easy to clean. Compared with the prior art of directly welding the cold plate 3 and the partition beam 2, the probability of the burrs generated by welding piercing the battery cell 6 is reduced.

[0050] Specifically, the cold plate 3 in the present application may include a plurality of sub-cold plates 313. The plurality of sub-cold plates 313 are sequentially spliced and fixed to form the cold plate 3. In the specific processing process, a variety of connection methods including friction stir welding may be used.

[0051] In the present application, the number of the protrusions 4 may be set according to the number of the partition beams 2 to be connected, and the number of the partition beams 2 is set according to the number of the assembly areas to be set during the assembly of the battery cells 6. Specifically, any suitable setting method may be selected according to the actual situation, and the present application does not make specific limitations in this regard.

[0052] During the processing, the plurality of sub-cold plates 313 provided with the protrusions 4 may be produced and processed by the same set of molds, that is, only two sets of molds may be set during the processing of the entire cold plate 3. One set of molds is used for the processing of the sub-cold plates 313 without the protrusions 4, and the other set of molds is used for the processing of the sub-cold plates 313 with the protrusions 4, thereby reducing the types of molds for the cold plate 3 and reducing the production cost.

[0053] In addition, the width of the protrusion 4 in this application is set to not exceed the width of the partition beam 2 it is connected to. According to the overall layout space inside the battery pack, the width of the protrusion 4 can usually be set to 15 mm - 30 mm.

[0054] For ease of processing and production, the height of the protrusion 4 can be set according to the size of the mold. At the same time, the mold for processing the sub-cooling plate 313 provided with the protrusion 4 can be obtained by locally modifying the mold of the sub-cooling plate 313 without the protrusion 4, avoiding the increase in production cost caused by repeated mold opening. At this time, the height of the protrusion 4 is set to not exceed the available maximum circumscribed circle contour of the corresponding cavity mold.

[0055] Furthermore, referring to Figures 4 to 6 as shown in, the specific structure of the protrusion 4 in this application can be set in any suitable way. Among them, the protrusion 4 can be set as a hollow structure, thereby reducing the overall weight of the cooling plate 3 and the protrusion 4. If necessary, reinforcing ribs can also be arranged inside the hollow protrusion 4 to enhance the strength of the protrusion 4. At the same time, the protrusion 4 can also be set as a solid structure, and the solid protrusion 4 ensures a relatively high strength at the connection position between the cooling plate 3 and the partition beam 2.

[0056] In addition, various suitable processing methods can be adopted between the protrusion 4 and the cooling plate 3 to achieve an integral setting. For example, the protrusion 4 and the cooling plate 3 can be integrally processed and formed by methods such as molding or casting. Specifically, it can be selected according to process and strength requirements, etc. This application does not make specific limitations on this.

[0057] In some embodiments provided by this application, a chamfer or fillet structure can also be provided at the connection position between the protrusion 4 and the cooling plate 3. By setting the chamfer or fillet structure, the strength at the connection position between the protrusion 4 and the cooling plate 3 can be enhanced. At the same time, the size of the chamfer or fillet structure also needs to be limited. When the size of the chamfer or fillet structure is too large, the battery cell 6 cannot fit the protrusion 4. The specific size range can be set according to the assembly requirements of the battery cell 6, etc.

[0058] In this application, any suitable connection method can be adopted between the protrusion 4 and the partition beam 2. In an exemplary embodiment provided by this application, the protrusion 4 and the partition beam 2 can be connected by welding. At this time, there is no need to worry about damaging the cooling plate 3 when using welding, and at the same time, the assembly efficiency can be improved. In some other embodiments of this application, the protrusion 4 and the partition beam 2 can also be connected by bolts, etc., so as to facilitate later disassembly or maintenance and replacement. Specifically, it can be selected according to assembly requirements. This application does not make specific limitations on this.

[0059] In addition, in order to further improve the connection strength and sealing effect between the protrusion 4 and the partition beam 2, in some other embodiments of the present application, while the protrusion 4 and the partition beam 2 are already fixed by welding or bolt connection, the connection surface between the protrusion 4 and the partition beam 2 can also be adhesively connected.

[0060] Refer to Figures 7 to 10 As shown in, at least one partition beam 2 divides the accommodation cavity 11 into at least two accommodation sub-cavities 111, and the accommodation sub-cavities 111 are used to accommodate the battery cells 6.

[0061] Based on the above embodiments of the present application, by providing the accommodation sub-cavities 111, multiple groups of battery cell 6 modules can be separately arranged in different accommodation sub-cavities 111. On the one hand, it can realize the modular setting of the battery, facilitate the thermal management of the battery, and improve the safety of the battery. On the other hand, the partition beam 2 can support and limit the battery module, improving the stability of the installation of the battery module in the battery pack.

[0062] In the present application, the specific structure of the partition beam 2 can be selected in any suitable setting manner. Refer to Figure 7 As shown in, in an embodiment provided by the present application, the partition beam 2 includes at least one longitudinal beam 21, and the extending direction of the longitudinal beam 21 is the same as the extending direction of the protrusion 4. The frame body 1 and the longitudinal beam 21 enclose the accommodation sub-cavity 111, and the protrusion 4 is fixedly connected to the longitudinal beam 21.

[0063] It should be noted that in the present application, the longitudinal beam 21 refers to a part of the partition beam 2 arranged along the length direction of the battery pack, and the cross beam 22 refers to a part of the partition beam 2 arranged along the width direction of the battery pack.

[0064] Based on the above embodiments of the present application, when the partition beam 2 is set as the longitudinal beam 21, at this time, the longitudinal beam 21 can be set to one, two, three or even multiple. The end of the longitudinal beam 21 is fixedly connected to the inner wall of the frame body 1 by welding or other means, so as to divide multiple accommodation sub-cavities 111 in the frame body 1. The specific number of the longitudinal beams 21 can be set according to the number of battery cell 6 modules. Subsequently, the protrusion 4 and the longitudinal beam 21 are fixed by welding or bolt connection or other means to realize the fixation of the cold plate 3. The end of the protrusion 4 can also be fixedly connected to the inner wall of the frame body 1 by welding or other means, so as to further enhance the overall connection strength.

[0065] Refer to Figure 7 As shown in, in another embodiment provided by the present application, the partition beam 2 can include at least one cross beam 22, and the extending direction of the cross beam 22 intersects with the extending direction of the protrusion 4. The cross beam 22 and the protrusion 4 enclose the accommodation sub-cavity 111, and the protrusion 4 is snap-connected and welded to the cross beam 22.

[0066] Based on the above embodiments of the present application, when the partition beam 2 is set as the cross beam 22, the cross beam 22 can also be set to one, two, three or even more. And the end of the cross beam 22 is also fixedly connected to the inner wall of the frame body 1. At this time, the protrusion 4 replaces the original longitudinal beam 21 structure and intersects with the cross beam 22, so as to divide the inside of the frame body 1 into a grid-like structure for installing different battery cell 6 modules. Then, the cross beam 22 and the protrusion 4 are snap-connected, and the connection strength between the protrusion 4 and the cross beam 22 is further enhanced by welding. Or in some other embodiments of the present application, the connection strength between the protrusion 4 and the cross beam 22 can also be enhanced by snap connection and bolt connection.

[0067] Further, the angle between the extending direction of the cross beam 22 and the extending direction of the protrusion 4 can be set to any appropriate angle. Since the battery cell 6 is generally set in a rectangular structure, in order to facilitate the installation of the battery cell 6, in actual use, the extending direction of the cross beam 22 and the extending direction of the protrusion 4 can be set to be perpendicular to each other.

[0068] Specifically, at least one first snap groove 221 is formed on the cross beam 22, and at least one second snap groove 211 is formed on the protrusion 4, and the second snap groove 211 is snap-connected with the first snap groove 221.

[0069] Based on the above embodiments of the present application, the snap connection between the cross beam 22 and the protrusion 4 is realized by respectively setting the first snap groove 221 and the second snap groove 211. In this way, not only the connection stability between the two can be ensured, but also the protrusion 4 and the cross beam 22 can be at least partially embedded with each other, so as to reduce the space occupied in the height direction inside the battery, and improve the volume utilization rate inside the battery.

[0070] In addition, the depths of the first snap groove 221 and the second snap groove 211 can be set in any appropriate way. In an exemplary embodiment provided by the present application, the dimensions of the protrusion 4 and the cross beam 22 in the height direction are the same. At this time, the depth of the first snap groove 221 can be set to half of the height of the cross beam 22, and the depth of the second snap groove 211 can be set to half of the height of the protrusion 4. Through the above settings, when the first snap groove 221 and the second snap groove 211 are snap-connected, the two ends of the protrusion 4 and the cross beam 22 are flush, reducing the space occupied inside the battery pack. At the same time, the depths of the first snap groove 221 and the second snap groove 211 are both limited within a more appropriate range, reducing the influence of the first snap groove 221 on the strength of the cross beam 22 and the influence of the second snap groove 211 on the strength of the protrusion 4.

[0071] Reference Figure 8As shown in, in some other embodiments provided in the present application, the partition beam 2 includes at least one cross beam 22 and at least one longitudinal beam 21, the extension direction of the longitudinal beam 21 is consistent with the extension direction of the protrusion 4, the cross beam 22 intersects with the longitudinal beam 21, the cross beam 22 and the longitudinal beam 21 cooperate with the frame 1 to form a accommodating sub-cavity 111, the protrusion 4 is fixedly connected to the longitudinal beam 21, and the protrusion 4 is clamped and welded to the cross beam 22.

[0072] Based on the above-mentioned embodiments of the present application, the cross beam 22 and the longitudinal beam 21 cooperate to separate the accommodating sub-cavity 111, and the protrusion 4 is connected to the longitudinal beam 21 to fix the cold plate 3. At this time, the angle between the cross beam 22 and the longitudinal beam 21 can also be set to a right angle or other angles.

[0073] Specifically, refer to Figure 8 As shown in the figure, at least one first snap-in groove 221 is respectively formed on both sides of the cross beam 22 facing the cold plate 3 and away from the cold plate 3, and at least one of the protrusion 4 and the longitudinal beam 21 is formed with a second snap-in groove 211, and the first snap-in groove 221 and the second snap-in groove 211 are snap-fitted.

[0074] Based on the above-mentioned embodiments of the present application, when the partition beam 2 includes both the cross beam 22 and the longitudinal beam 21, the longitudinal beam 21 and the protrusion 4 are respectively arranged on both sides of the cross beam 22, and at least one of the longitudinal beam 21 and the protrusion 4 is clamped with the cross beam 22. For example, when the dimension of the longitudinal beam 21 in the battery pack height direction is larger than the protrusion 4, a second clamping groove 211 can be provided on the longitudinal beam 21 for clamping with the first clamping groove 221 on the cross beam 22. At this time, the depth of the second clamping groove 211 can be set deeper to ensure the stability of the clamping. Conversely, when the dimension of the protrusion 4 in the battery pack height direction is larger than the longitudinal beam 21, a second clamping groove 211 can be provided on the protrusion 4. In addition, the second clamping groove 211 can be provided on both the protrusion 4 and the longitudinal beam 21 to clamp with the cross beam 22.

[0075] Through the above-mentioned arrangement, the coordinated clamping of the first clamping groove 221 and the second clamping groove 211 can respectively realize the clamping connection between the crossbeam 22 and the longitudinal beam 21 and between the crossbeam 22 and the protrusion 4, and when the longitudinal beam 21 and the protrusion 4 are fixedly connected, the crossbeam 22 is located between the two, so the longitudinal beam 21 and the protrusion 4 can cooperate to clamp and fix the crossbeam 22, thereby making the overall connection structure among the longitudinal beam 21, the crossbeam 22 and the protrusion 4 more stable.

[0076] In the present application, the height and specific arrangement of the protrusion 4 and the partition beam 2 can be any suitable arrangement according to the actual application.

[0077] For example, when the overall strength of the battery pack can meet the preset strength requirements, the height of the protrusion 4 can be set relatively low, so that there is no need to add components such as the longitudinal beam 21 or the cross beam 22, thereby improving the overall utilization rate of the battery pack, and the integrated short rib structure facilitates the installation of the CTP (cell-to-pack) battery structure into the box.

[0078] When the overall strength of the battery pack cannot meet the preset strength requirements, the height of the protrusion 4 can be set relatively high. The protrusion 4 as a whole replaces the cross beam 22 or the longitudinal beam 21, so that the longitudinal beam 21 or the cross beam 22 is integrally arranged, thereby improving the overall strength of the battery pack. In addition, when the height of the protrusion 4 exceeds the upper limit of the maximum circumscribed circle of the mold, a separate cross beam 22 or longitudinal beam 21 component can be added and fixed by means such as welding.

[0079] Furthermore, the connection structure between the longitudinal beam 21, the cross beam 22 and the protrusion 4 in this application is not limited to the above-mentioned snap connection structure. Refer to Figure 10 and Figure 11 As shown in, in an exemplary embodiment provided in this application, when the partition beam 2 includes both the longitudinal beam 21 and the cross beam 22 at the same time, both ends of the longitudinal beam 21 are fixedly connected to the inner wall of the frame body 1, and the cross beam 22 is arranged between the longitudinal beam 21 and the frame body 1 and between two adjacent longitudinal beams 21. At this time, a connecting piece 8 is arranged at the connection position between the cross beam 22 and the longitudinal beam 21. The connecting piece 8 is arranged in a cross-shaped structure or a T-shaped structure, and the connecting piece 8 and the cross beam 22 and the longitudinal beam 21 can be connected by various methods including bolt connection.

[0080] Similarly, it can be known that in some other embodiments of this application, when the partition beam 2 only includes the cross beam 22, the cross beam 22 and the protrusion 4 can also be connected by setting the connecting piece 8.

[0081] In addition, it should be noted that the setting direction of the protrusion 4 in this application is not limited to being the same as the extending direction of the longitudinal beam 21. Specifically, it can be set according to the extending direction of the flow channel 32 in the cold plate 3. When the extending direction of the protrusion 4 is the same as the extending direction of the flow channel 32, it is convenient for the integrated processing of the cold plate 3 and the protrusion 4.

[0082] Furthermore, in order to further improve the stability of the internal connection of the battery pack, any suitable connection method can be selected between the protrusion 4 and the frame body 1 and between the cold plate 3 and the frame body 1 in this application.

[0083] In an embodiment provided in this application, both ends of the protrusion 4 can be fixedly connected to the inner wall of the frame body 1. Specifically, various connection methods including bolt connection and welding can be adopted. For example, when the protrusion 4 is set as a solid structure, the protrusion 4 can be directly fixed to the frame body 1 by bolt connection. When the protrusion 4 is set as a hollow structure, it can be fixed to the frame body 1 by welding.

[0084] In addition, since the cold plate 3 is fixedly connected to the protrusion 4, when the protrusion 4 is connected to the frame 1, an indirect connection between the cold plate 3 and the frame 1 has been achieved. At this time, in order to further strengthen the strength of the battery pack, the cold plate 3 and the frame 1 can be fixed by welding or bolt connection or other means.

[0085] Reference Figure 2 and Figure 3 As shown in and , in an embodiment provided by the present application, a supporting member 5 may further be provided on a side of the partition beam 2 away from the cold plate 3, and the supporting member 5 is used to support the battery cell 6. Wherein, the supporting member 5 includes a connecting portion 51 and a supporting portion 52. The connecting portion 51 is disposed on a side of the partition beam 2 away from the cold plate 3, the supporting portion 52 is disposed at an end of the connecting portion 51 away from the cold plate 3, and the extending direction of the supporting portion 52 is perpendicular to the extending direction of the connecting portion 51. The battery cell 6 is located between the supporting portion 52 and the cold plate 3, and the connecting portion 51 is fixedly connected to the partition beam 2. Alternatively, the connecting portion 51 is detachably connected to the partition beam 2.

[0086] Based on the above embodiments of the present application, by providing the supporting member 5, when the battery cell 6 is arranged upside down, the battery cell 6 is located below the cold plate 3. At this time, the supporting member 5 is arranged below the battery cell 6 and is connected to the cold plate 3 through the partition beam 2, so as to support the battery cell 6, making the installation structure of the battery cell 6 more stable.

[0087] In addition, it should be noted that the supporting member 5 in the present application is not only applicable to the case where the battery cell 6 is arranged upside down. When the battery cell 6 is arranged upright, at this time, the battery cell 6 is also located between the cold plate 3 and the supporting member 5, and the battery cell 6 can be straightened by the supporting member 5, so as to play a role in fixing and supporting the battery cell 6, and can also make the installation structure of the battery cell 6 more stable.

[0088] Specifically, the supporting member 5 includes a connecting portion 51 and a supporting portion 52. During specific use, the supporting portion 52 is located below the battery cell 6 to support the battery cell 6, and the connecting portion 51 is used to connect the supporting portion 52 to the partition beam 2, thereby realizing the connection between the supporting portion 52 and the cold plate 3. Wherein, the connecting portion 51 and the partition beam 2 can be fixedly connected, for example, the connecting portion 51 and the partition beam 2 are directly fixed by welding or gluing or other means, or can be detachably connected, for example, the connecting portion 51 and the partition beam 2 are bolted, so as to facilitate later replacement and disassembly.

[0089] In addition, when the partition beam 2 only includes the cross beam 22, at this time, the role of the longitudinal beam 21 is integrally replaced by the protrusion 4, or when the partition beam 2 only includes the longitudinal beam 21, the role of the cross beam 22 is integrally replaced by the protrusion 4. At this time, the connecting portion 51 can also be directly connected to the protrusion 4 to achieve fixed support.

[0090] ReferenceFigure 2 and Figure 3 As shown in Figure 3 , since the partition beam 2 is disposed between the battery cells 6, battery cells 6 are disposed on both sides of the supporting member 5. At this time, the connecting portion 51 and the supporting portion 52 can form an inverted T-shaped structure, so that the supporting member 5 can simultaneously support the battery cells 6 on both sides. Alternatively, the connecting portion 51 and the supporting portion 52 can be formed into an L-shaped structure. At this time, the supporting member 5 can support the battery cells 6 on one side. Any suitable setting method can be specifically selected according to the actual use situation.

[0091] Further, since the pole columns of the battery cells 6 face the bottom of the battery pack when the battery cells 6 are disposed in an inverted manner, the supporting portion 52 of the supporting member 5 will be close to the pole columns when the supporting member 5 is disposed. In order to improve the insulation effect between the supporting member 5 and the pole columns of the battery cells 6, the supporting member 5 needs to be insulated.

[0092] Referring to Figure 3 As shown in Figure 3 , in an exemplary embodiment provided by the present application, an insulating layer 53 is disposed on the supporting member 5, and the insulating layer 53 directly covers the outside of the supporting portion 52, so as to realize the insulation treatment between the supporting member 5 and the pole columns of the battery cells 6. Alternatively, the insulating layer 53 can also be covered on the outside of both the supporting portion 52 and the connecting portion 51, and can be specifically set according to the creepage distance requirements and the like.

[0093] In addition, in some other embodiments of the present application, the supporting member 5 can also be insulated in other ways. For example, the overall material of the supporting member 5 is set to an insulating material such as plastic, and can be specifically set according to the strength of the supporting member 5 and the connection requirements, etc. The present application does not make specific limitations on this.

[0094] It should be noted that the battery pack in the present application further includes other components, such as a bottom guard plate 7, a vehicle seat bracket and other structures. The above structures can be set in any suitable way according to the actual use situation. Since the present application does not involve the improvement of the above structures, they will not be elaborated herein.

[0095] The preferred embodiments of the present application have been described in detail above with reference to the drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application.

[0096] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present application does not further describe various possible combination methods.

[0097] In addition, any combination can be made among various different embodiments of the present application, as long as it does not violate the idea of the present application, and it should also be regarded as the content disclosed by the present application.

Claims

1. A battery pack, characterized in that: The battery pack comprises: A frame body, wherein the frame body has a receiving cavity; at least one partition beam, the partition beam being disposed in the accommodating cavity; A cold plate, directly or indirectly connected to the frame, wherein at least one protrusion is provided on an outer wall of the cold plate, and the protrusion is integrally provided with the cold plate; Wherein, the protrusion is connected to the partition beam, and the cold plate is arranged on one side of the frame.

2. The battery pack according to claim 1, characterized in that: The protrusion is connected to the partition beam by welding or bolts.

3. The battery pack according to claim 1, characterized in that: At least one of the partition beams divides the accommodating cavity into at least two accommodating sub-cavities, and the accommodating sub-cavities are used to accommodate battery cells.

4. The battery pack according to claim 3, characterized in that: The partition beam includes at least one longitudinal beam, the extension direction of the longitudinal beam is consistent with the extension direction of the protrusion, the frame and the longitudinal beam surround the accommodating sub-cavity, and the protrusion is fixedly connected to the longitudinal beam.

5. The battery pack according to claim 3, characterized in that: The partition beam comprises at least one cross beam, the extension direction of the cross beam intersects with the extension direction of the protrusion, the cross beam and the protrusion form the accommodating sub-cavity, and the protrusion is clamped and welded to the cross beam.

6. The battery pack according to claim 5, characterized in that: At least one first clamping groove is formed on the crossbeam, and at least one second clamping groove is formed on the protrusion, and the second clamping groove is clamped with the first clamping groove.

7. The battery pack according to claim 3, characterized in that: The partition beam includes at least one cross beam and at least one longitudinal beam, the extension direction of the longitudinal beam is consistent with the extension direction of the protrusion, the cross beam intersects with the longitudinal beam, the cross beam and the longitudinal beam cooperate with the frame to form the accommodating sub-cavity, the protrusion is fixedly connected to the longitudinal beam, and the protrusion is clamped and welded to the cross beam.

8. The battery pack according to claim 7, characterized in that: The cross beam is provided with at least one first clamping groove on both sides facing the cold plate and away from the cold plate, respectively. At least one of the protrusion and the longitudinal beam is provided with a second clamping groove, and the first clamping groove is clamped with the second clamping groove.

9. The battery pack according to any one of claims 1 to 8, characterized in that: A supporting member is provided on one side of the partition beam away from the cold plate, and the supporting member is used to support the battery cell; Wherein, the supporting member comprises a connecting portion and a supporting portion, the connecting portion is arranged on a side of the partition beam away from the cold plate, the supporting portion is arranged at an end of the connecting portion away from the cold plate, and the extending direction of the supporting portion is perpendicular to the extending direction of the connecting portion, the battery cell is located between the supporting portion and the cold plate, and the connecting portion is fixedly connected to the partition beam; or, The connecting portion is detachably connected to the partition beam.

10. An electrical device, characterized in that: The electrical device comprises a battery pack as claimed in any one of claims 1 to 9.

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