Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and an electric device, and belongs to the technical field of batteries. Comprising a battery pack and a tray which are connected, the tray comprises a body, the body defines a containing cavity, and the battery pack is arranged in the containing cavity; part of the body extends and protrudes in the direction away from the battery pack along the first direction to form a reinforcing part; the orthographic projection of the battery pack connected to the end portion of the body in the first direction overlaps the orthographic projection of the reinforcing portion in the first direction. In the embodiment of the invention, the thickness of the body is increased through the arrangement of the reinforcing part, and the strength of the body is improved. The orthographic projection of the end part, connected to the body, of the battery pack along the first direction is overlapped with the orthographic projection of the reinforcing part along the first direction, so that the easy-to-fail end part of the battery pack is indirectly connected with the reinforcing part, and the beneficial effects of improving the connection strength of the battery pack and the tray and reducing the connection failure risk of the end part of the battery pack are achieved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery pack and electrical equipment. Background Art

[0002] At present, the module-free technology (Cell To Pack, CTP) can be used to fix multiple cells arranged in sequence in a battery box to assemble a battery pack. Since the above battery pack arranges more cells in a limited space, the integration efficiency of the cells is improved and the cost of the battery pack is reduced.

[0003] However, the CTP battery pack reduces the module structure, making the battery cell module more dependent on the connection of the battery box. The entire battery cell module is connected in the battery box. During use, stress concentration problems are prone to occur at the connection edge between the battery box and the end of the battery cell module. The risk of failure at this point is high, affecting the safety and reliability of the battery pack. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a battery pack and an electrical device that can solve the problem of high risk of cell connection failure at the edge of the battery pack in the prior art.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery pack, comprising a battery pack and a tray, wherein the battery pack and the tray are connected along a first direction, the tray comprising a main body, the main body enclosing a receiving cavity, and the battery pack being arranged in the receiving cavity; a portion of the main body extends and protrudes along the first direction away from the battery pack to form a reinforcing portion; wherein the orthographic projection of the end of the battery pack connected to the main body along the first direction overlaps with the orthographic projection of the reinforcing portion along the first direction.

[0007] In the embodiment of the present application, the tray is used to place the battery pack and provide a certain placement space for the battery pack. Among them, the tray includes a body and a reinforcement part, the body is enclosed to form a receiving cavity, the battery pack is arranged in the receiving cavity, and part of the body protrudes to form a reinforcement part, and the reinforcement part is arranged to improve the connection strength of the body at the connection between the battery pack and the tray. Specifically, in practical applications, the connection of the end of the battery pack in the battery pack is often a relatively weak area, and the risk of debonding is prone to occur during use. In the embodiment of the present application, part of the body protrudes in the direction away from the battery pack along the first direction to form a reinforcement part. It can be understood that compared with the overall body, the setting of the reinforcement part thickens the thickness of the part of the body along the first direction, thereby improving the strength of the part of the body. Further, the orthographic projection of the end of the battery pack connected to the body along the first direction overlaps with the orthographic projection of the reinforcement part along the first direction, that is, the end of the battery pack that is prone to failure is connected to the part of the body formed with the reinforcement part, and is connected to the reinforcement part, which has the beneficial effect of improving the connection strength of the battery pack and the tray and reducing the risk of failure of the end connection of the battery pack in the battery pack.

[0008] Optionally, the main body includes a supporting plate and two first frames, the two first frames are arranged opposite to each other along a second direction, the supporting plate and the two first frames are respectively connected and used to enclose a accommodating cavity; a portion of the first frames extends and protrudes along the first direction away from the battery pack to form the reinforcing portion; the second direction is perpendicular to the first direction.

[0009] Optionally, a flow channel is provided inside the carrier plate 211 , and the flow channel is used to accommodate a heat exchange medium, and part of the battery pack 10 is connected to the carrier plate 211 .

[0010] Optionally, the first frame includes a bottom plate and a side plate, the side plate is connected to the end of the bottom plate facing away from the supporting plate, the side plate protrudes from the bottom plate in a direction approaching the battery pack, the battery pack is connected to the bottom plate, the reinforcement portion is arranged on a side of the bottom plate facing away from the battery pack, and the reinforcement portion protrudes from the bottom plate along the first direction away from the battery pack.

[0011] Optionally, an overlapping length of an orthographic projection of the battery pack along the first direction and an orthographic projection of the reinforcement portion along the first direction along the second direction is L1, wherein 8 mm ≤ L1 ≤ 100 mm.

[0012] Optionally, a length of the battery pack extending along the second direction is L2, wherein 0.8%≤L1 / L2≤30%.

[0013] Optionally, the bottom plate includes a main body and a glue limiting boss, the glue limiting boss is connected to the main body, the glue limiting boss is arranged on the side of the main body facing the battery pack, and the glue limiting boss protrudes from the main body along the first direction toward the battery pack, and the side plate, the main body and the glue limiting boss are used to enclose to form a glue groove; the orthographic projection of the end of the battery pack connected to the main body along the first direction overlaps with the orthographic projection of the glue groove along the first direction.

[0014] Optionally, the tray also includes an insulating film, which is connected to the base plate, and the insulating film is arranged on the side of the base plate facing the battery pack, and the insulating film is adhered to the contour of the main body and the contour of the glue limiting boss; the insulating film is connected to the battery pack on the side away from the base plate, and the orthographic projection of the end of the battery pack connected to the insulating film along the first direction overlaps with the orthographic projection of the insulating film along the first direction.

[0015] Optionally, a thickness of the reinforcing portion along the first direction is H, 1mm≤H≤10mm; and / or a thickness of the adhesive limiting boss along the first direction is h, 0.2mm≤h≤2mm.

[0016] Optionally, the length of the insulating film along the second direction is L3, and the overlapping length of the orthographic projection of the insulating film along the first direction and the orthographic projection of the battery pack along the first direction along the second direction is L4; wherein L3>L4, and L3-L4<L4.

[0017] Optionally, the tray further comprises a plurality of cross beams, which are arranged in the accommodating cavity at intervals along a third direction, the two ends of the cross beams are respectively connected to the first frame, the cross beams are crimped to the insulating film, and the plurality of cross beams divide the accommodating cavity into a plurality of accommodating sub-cavities; the battery pack comprises a plurality of battery sub-groups, which are arranged in the accommodating sub-cavities; wherein the third direction, the second direction and the first direction are perpendicular to each other.

[0018] In a second aspect, an embodiment of the present application further provides an electrical device, comprising a battery pack as described above.

[0019] In the embodiment of the present application, by setting the reinforcing part on the side of the body away from the battery pack, and the reinforcing part protruding from the body in the direction away from the battery pack along the first direction, it can be understood that the setting of the reinforcing part increases the thickness of the body along the first direction, thereby improving the strength of the body. Further, the orthographic projection of the end of the battery pack connected to the body along the first direction overlaps with the orthographic projection of the reinforcing part along the first direction, that is, the end of the battery pack that is prone to failure is connected to the body, and is indirectly connected through the body and the reinforcing part, which has the beneficial effect of improving the connection strength between the battery pack and the tray and reducing the risk of end connection failure of the battery pack in the battery pack.

[0020] Specifically, the electrical equipment may include energy storage equipment, vehicles, drones, etc. Vehicles include but are not limited to pure electric vehicles, hybrid vehicles, extended-range electric vehicles, and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the cross-sectional structure of a battery pack in an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the structure of a tray in an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of the structure of the first frame in an embodiment of the present application;

[0024] Figure 4 is a schematic diagram of the structure of the second frame in an embodiment of the present application;

[0025] Figure 5 is a schematic structural diagram of the third frame in the embodiment of the present application;

[0026] Figure 6 is a schematic diagram of the structure of the crossbeam in an embodiment of the present application;

[0027] Figure 7 is a schematic diagram of the structure of the load-bearing plate in an embodiment of the present application;

[0028] Figure 8 is a schematic diagram of the cross-sectional structure of a load-bearing plate in an embodiment of the present application;

[0029] Fig. 9 is a schematic diagram of the connection structure between the battery pack and the tray in an embodiment of the present application;

[0030] Fig.10 In the embodiment of this application Fig. 9 A schematic diagram of the enlarged local structure at point A in the middle.

[0031] Description of reference numerals:

[0032] 10. Battery pack; 20. Tray; 21. Main body; 211. Loading plate; 212. First frame; 213. Second frame; 214. Third frame; 215. Accommodating cavity; 2121. Bottom plate; 2121a. Main body; 2121b. Glue limiting boss; 2122. Side plate; 2123. Glue groove; 22. Reinforcement part; 23. Insulating film; 24. Crossbeam; Z, first direction; X, second direction; Y, third direction. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0035] The battery pack and electrical equipment provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0036] See also Figures 1 to 10 An embodiment of the present application provides a battery pack, including a battery pack 10 and a tray 20, the battery pack 10 and the tray 20 are connected along a first direction Z, the tray 20 includes a main body 21 and a reinforcing portion 22, the main body 21 encloses a receiving cavity 215, and the battery pack 10 is arranged in the receiving cavity 215; a portion of the main body 21 extends and protrudes along the first direction away from the battery pack to form a reinforcing portion; wherein the orthographic projection of the end of the battery pack 10 connected to the main body 21 along the first direction Z overlaps with the orthographic projection of the reinforcing portion 22 along the first direction Z.

[0037] In the embodiment of the present application, the tray 20 is used to place the battery pack 10 and provide a certain placement space for the battery pack 10. The tray 20 includes a main body 21 and a reinforcing portion 22. The main body 21 encloses a housing cavity 215. The battery pack 10 is arranged in the housing cavity 215. A portion of the main body 21 protrudes to form the reinforcing portion 22. The reinforcing portion 22 is arranged to improve the connection strength of the main body 21 at the connection between the battery pack 10 and the tray 20. Specifically, in practical applications, the connection at the end of the battery pack 10 in the battery pack is often a relatively weak area, and there is a risk of debonding during use. In the embodiment of the present application, a portion of the main body 21 protrudes in the direction away from the battery pack 10 along the first direction Z to form the reinforcing portion 22. It can be understood that compared with the overall main body 21, the setting of the reinforcing portion 22 thickens the thickness of the portion of the main body 21 along the first direction Z, thereby improving the strength of the portion of the main body 21. Furthermore, the orthographic projection of the end of the battery pack 10 connected to the main body 21 along the first direction Z overlaps with the orthographic projection of the reinforcement portion 22 along the first direction Z, that is, the end of the battery pack 10 that is prone to failure is connected to the portion of the main body 21 where the reinforcement portion 22 is formed, and is connected to the reinforcement portion 22, which has the beneficial effect of increasing the connection strength between the battery pack 10 and the tray 20 and reducing the risk of end connection failure of the battery pack 10 in the battery pack.

[0038] Further, the reinforcing portion 22 extends along the third direction Y, and the reinforcing portion 22 may extend the entire length of the body 21 along the third direction Y, or may extend a portion of the length of the body 21 along the third direction Y. In practical applications, when the reinforcing portion 22 extends the entire length of the body 21 along the third direction Y, the reinforcing portion 22 may completely overlap with the end of the battery pack 10; when the reinforcing portion 22 extends a portion of the length of the body 21 along the third direction Y, the reinforcing portion 22 may partially overlap with the end of the battery pack 10.

[0039] Optionally, in an embodiment of the present application, the main body 21 includes a supporting plate 211 and two first frames 212, the two first frames 212 are arranged relatively to each other along the second direction X, the supporting plate 211 and the two first frames 212 are respectively connected and used to enclose a accommodating cavity 215; a portion of the first frame 212 extends and protrudes along the first direction away from the battery pack 10 to form a reinforcing portion 22; the second direction X is perpendicular to the first direction Z.

[0040] In the embodiment of the present application, the two first frames 212 are arranged opposite to each other along the second direction X, and the carrier plate 211 is sandwiched between the two first frames 212. It can be understood that the carrier plate 211 and the first frame 212 enclose a receiving cavity 215 in which the battery pack 10 can be placed. The battery pack 10 can be connected to the first frame 212, or to the first frame 212 and the carrier plate 211, and this embodiment does not make any limitation to this. In the embodiment of the present application, it can be understood that the setting of the reinforcing portion 22 increases the thickness of the first frame 212 along the first direction Z, thereby improving the strength of the first frame 212. Further, the orthographic projection of the end of the battery pack 10 connected to the body 21 along the first direction Z overlaps with the orthographic projection of the reinforcing portion 22 along the first direction Z, that is, the end of the battery pack 10 that is prone to failure is connected to the first frame 212, and by setting the reinforcing portion 22 at the corresponding position of the first frame 212, the connection strength between the battery pack 10 and the first frame 212 can be improved, and the beneficial effect of reducing the risk of failure of the end connection of the battery pack 10 in the battery pack is achieved.

[0041] It should be noted that the main body 21 may also include a second frame 213 and a third frame 214 arranged relatively to each other along the first direction Z, a first frame 212, a second frame 213, another second frame 213 and a third frame 214 are connected end to end in sequence, and the supporting plate 211 is respectively connected to the two first frames 212, the second frame 213 and the third frame 214 to enclose a accommodating cavity 215.

[0042] It should also be noted that the tray 20 may also include a thermal insulation component, which is connected to the side of the first frame 212 facing away from the accommodating cavity 215. Furthermore, the side of the second frame 213 facing away from the accommodating cavity 215 and the side of the third frame 214 facing away from the accommodating cavity 215 may also be provided with a thermal insulation component. The provision of the thermal insulation component can ensure the thermal management of the entire battery pack, which has the beneficial effect of reducing the energy loss of the battery pack.

[0043] Furthermore, the insulating film 23 extends along the third direction Y. The insulating film 23 may extend along the entire length of the body 21 along the third direction Y, or may extend along the third direction Y for a portion of the length of the body 21. In practical applications, when the insulating film 23 extends along the third direction Y for the entire length of the body 21, the insulating film 23 may completely overlap with the end of the battery pack 10; when the insulating film 23 extends along the third direction Y for a portion of the length of the body 21, the insulating film 23 may partially overlap with the end of the battery pack 10.

[0044] Optionally, in the embodiment of the present application, a flow channel is provided inside the carrier plate 211 , the flow channel is used to accommodate a heat exchange medium, and a portion of the battery pack 10 is connected to the carrier plate 211 .

[0045] In the embodiment of the present application, the carrier plate 211 with a flow channel inside has the function of supporting the battery pack 10 on the one hand, and also has the function of cooling the battery pack 10 on the other hand. Specifically, the flow channel can be used to accommodate a heat exchange medium, which can be a liquid or a gas, and this embodiment does not impose any restrictions on this. By arranging a heat exchange medium in the flow channel and connecting part of the battery pack 10 to the carrier plate 211, heat exchange between the battery pack 10 and the carrier plate 211 can be achieved, thereby achieving cooling of the battery pack 10.

[0046] Furthermore, the flow channel may include multiple sub-flow channels, and the number, shape, and arrangement of the sub-flow channels may be determined according to specific circumstances, and this embodiment does not impose any limitation on this.

[0047] It should be noted that the battery pack 10 and the carrier board 211 can be connected by direct connection methods such as snap connection, or by indirect connection methods such as bonding with thermal conductive adhesive. The specific connection method can be determined according to actual conditions, and this embodiment does not impose any limitation on this.

[0048] Optionally, in an embodiment of the present application, the first frame 212 includes a bottom plate 2121 and a side plate 2122, the side plate 2122 is connected to the end of the bottom plate 2121 away from the supporting plate 211, the side plate 2122 protrudes from the bottom plate 2121 in a direction close to the battery pack 10, the battery pack 10 is connected to the bottom plate 2121, the reinforcement portion 22 is arranged on the side of the bottom plate 2121 away from the battery pack 10, and the reinforcement portion 22 protrudes from the bottom plate 2121 along the first direction Z in a direction away from the battery pack 10.

[0049] In the embodiment of the present application, the side plate 2122 is provided to limit the battery pack 10 along the second direction X, and the bottom plate 2121 is provided to realize the connection between the first frame 212 and the battery pack 10. In the embodiment of the present application, the reinforcing portion 22 is provided on the side of the bottom plate 2121 away from the battery pack 10, and the reinforcing portion 22 protrudes from the bottom plate 2121 in the direction away from the battery pack 10 along the first direction Z. It can be understood that the provision of the reinforcing portion 22 increases the thickness of the bottom plate 2121 along the first direction Z, thereby improving the strength of the bottom plate 2121. Further, the orthographic projection of the end of the battery pack 10 connected to the body 21 along the first direction Z overlaps with the orthographic projection of the reinforcing portion 22 along the first direction Z, that is, the end of the battery pack 10 that is prone to failure is connected to the bottom plate 2121, and is indirectly connected through the bottom plate 2121 and the reinforcing portion 22, which has the beneficial effect of improving the connection strength between the battery pack 10 and the bottom plate 2121 and reducing the risk of end connection failure of the battery pack 10 in the battery pack.

[0050] It should be noted that the reinforcing portion 22 protrudes from the bottom plate 2121 along the first direction Z, that is, the thickness of the bottom plate 2121 at the position where the reinforcing portion 22 is provided is increased along the first direction Z. Specifically, the thickness of the bottom plate 2121 and the thickness of the reinforcing portion 22 can be determined according to actual conditions. This embodiment does not impose any restrictions on the thickness of the bottom plate 2121 and the specific thickness of the reinforcing portion 22. For example, the thickness of the bottom plate 2121 along the first direction Z can be 4 mm. When the thickness of the bottom plate 2121 is 8 mm, the thickness of the reinforcing portion 22 can be 4 mm. By setting the reinforcement, the thickness of the local area of ​​the bottom plate 2121 is increased from 8 mm to 12 mm. By increasing the thickness of the structure, the connection strength of the battery pack 10 is improved.

[0051] Optionally, in the embodiment of the present application, the overlapping length of the orthographic projection of the battery pack 10 along the first direction Z and the orthographic projection of the reinforcement portion 22 along the first direction Z along the second direction X is L1, wherein 8 mm ≤ L1 ≤ 100 mm.

[0052] In the embodiment of the present application, the orthographic projection of the battery pack 10 along the first direction Z has a certain extension length along the second direction X, and the orthographic projection of the reinforcement part 22 along the first direction Z also has a certain length along the second direction X. Since the orthographic projection of the end of the battery pack 10 connected to the body 21 along the first direction Z overlaps with the orthographic projection of the reinforcement part 22 along the first direction Z, it can be understood that the orthographic projection of the battery pack 10 along the first direction Z and the orthographic projection of the reinforcement part 22 along the first direction Z have a certain overlapping length L1 along the second direction X. Specifically, the range of the overlapping length L1 is greater than or equal to 8mm and less than or equal to 100mm. In practical applications, when the overlapping length L1 is less than 8mm, the indirect connection overlap area between the battery pack 10 and the reinforcement part 22 is insufficient, and it is difficult to maintain a high connection strength, and there is a risk of debonding between the end of the battery pack 10 and the tray 20. When the overlapping length L1 is greater than 100mm, the length of the reinforcement part 22 also needs to be increased accordingly, and the weight of the reinforcement part 22 also increases accordingly, which leads to an increase in the weight of the tray 20, which is not conducive to the overall weight reduction trend of the battery pack.

[0053] Optionally, in the embodiment of the present application, the length of the battery pack 10 extending along the second direction X is L2, wherein 0.8%≤L1 / L2≤30%.

[0054] In the embodiment of the present application, the extension length of the battery pack 10 along the second direction X is L2, the above-mentioned overlapping length is L1, and the ratio between the overlapping length L1 and the extension length L2 of the battery pack 10 along the second direction X is in the range of 0.8%-30% (including 0.8% and 30%). That is to say, the overlapping length L1 accounts for at least 0.8% of the extension length L2 of the battery pack 10 along the second direction X, and the overlapping length L1 accounts for at most 30% of the extension length L1 of the battery pack 10 along the second direction X. Specifically, in actual application, when the overlapping length L1 accounts for less than 0.8% of the extension length L2 of the battery pack 10 along the second direction X, the overlapping length L1 is smaller than the extension length L2 of the battery pack 10 along the second direction X. As a result, the indirect connection overlap area between the battery pack 10 and the reinforcing portion 22 is insufficient, and it is difficult to maintain a high connection strength, which has the risk of debonding between the end of the battery pack 10 and the tray 20. When the overlapping length L1 accounts for more than 30% of the extension length L2 of the battery pack 10 along the second direction X, the length of the reinforcing portion 22 is correspondingly increased, and the weight of the reinforcing portion 22 is also increased, which leads to an increase in the weight of the tray 20, which is not conducive to the overall weight reduction trend of the battery pack.

[0055] Optionally, in an embodiment of the present application, the bottom plate 2121 includes a main body 2121a and a glue limiting boss 2121b, the glue limiting boss 2121b is connected to the main body 2121a, the glue limiting boss 2121b is arranged on the side of the main body 2121a facing the battery pack 10, and the glue limiting boss 2121b protrudes from the main body 2121a along the first direction Z towards the direction close to the battery pack 10, the side plate 2122, the main body 2121a and the glue limiting boss 2121b are combined to form a glue groove 2123; the orthographic projection of the end of the battery pack 10 connected to the main body 2121a along the first direction Z overlaps with the orthographic projection of the glue groove 2123 along the first direction Z.

[0056] In the embodiment of the present application, the battery pack 10 and the bottom plate 2121 can be bonded by an adhesive layer to achieve the connection between the bottom plate 2121 and the battery pack 10. The setting of the adhesive limiting boss 2121b is used to limit the adhesive layer. Specifically, the adhesive limiting boss 2121b is connected to the main body 2121a, and the adhesive limiting boss 2121b is arranged on the side of the main body 2121a facing the battery pack 10, and the adhesive limiting boss 2121b protrudes from the main body 2121a along the first direction Z direction close to the battery pack 10, and the side plate 2122, the main body 2121a and the adhesive limiting boss 2121b are enclosed to form an adhesive groove 2123, and the setting of the adhesive groove 2123 is used to provide a placement space for the adhesive layer to achieve the bonding effect. In actual application, when bonding the battery pack 10 and the bottom plate 2121, the glue enters the glue groove 2123 as a fluid, and the setting of the glue limiting boss 2121b limits the flowing glue, which has the effect of preventing the fluid glue from flowing disorderly. Further, a structural glue is set in the glue groove 2123, and the positive projection of the end of the battery pack 10 connected to the main body 2121a along the first direction Z overlaps with the positive projection of the glue groove 2123 along the first direction Z. It can be understood that the end of the battery connected to the main body 21 is bonded to the bottom plate 2121 through the glue layer set in the glue groove 2123.

[0057] It should be noted that the glue groove 2123 extends along the third direction Y, and the glue groove 2123 can extend the entire length of the body 21 along the third direction Y, or can extend a portion of the length of the body 21 along the third direction Y. In practical applications, when the glue groove 2123 extends the entire length of the body 21 along the third direction Y, the glue groove 2123 can completely overlap with the end of the battery pack 10; when the glue groove 2123 extends a portion of the length of the body 21 along the third direction Y, the glue groove 2123 can partially overlap with the end of the battery pack 10.

[0058] Optionally, in the embodiment of the present application, the thickness of the reinforcing portion 22 along the first direction is H, 1mm≤H≤10mm; and / or the thickness of the adhesive limiting boss 2121b along the first direction is h, 0.2mm≤h≤2mm.

[0059] In the implementation of this application, the thickness of the reinforcing portion 22 along the first direction can be limited to be greater than or equal to 1mm and less than or equal to 10mm. Alternatively, the thickness of the adhesive limiting boss 2121b along the first direction can be limited to be greater than or equal to 0.2mm and less than or equal to 2mm. The thickness of the reinforcing portion 22 along the first direction can also be limited to be greater than or equal to 1mm and less than or equal to 10mm, and the thickness of the adhesive limiting boss 2121b along the first direction can be limited to be greater than or equal to 0.2mm and less than or equal to 2mm. Specifically, the thickness of the reinforcing portion 22 can be greater than or equal to 1mm and less than or equal to 10mm. Specifically, the thickness of the reinforcing portion 22 can be 1mm, 1.5mm, 2.6mm, 3mm... etc. The reinforcing portion 22 within the above value range can achieve the enhancement of the strength of the body 21 while not increasing the weight of the body 21 too much, resulting in excessive weight of the tray 20 and increasing the weight of the battery pack. In addition, the value range of the thickness of the adhesive limiting boss 2121b along the first direction Z is greater than or equal to 0.2mm and less than or equal to 2mm. The glue limiting boss 2121b within the above value range can limit the flowing glue while preventing the glue groove 2123 from being too deep due to the glue limiting boss 2121b being too thick, thereby requiring too much glue to achieve bonding.

[0060] Specifically, the thickness of the reinforcing portion 22 and the thickness of the adhesive limiting boss 2121b can be set according to actual conditions. This embodiment does not limit the specific thickness of the reinforcing portion 22 and the specific thickness of the adhesive limiting boss 2121b.

[0061] Optionally, in an embodiment of the present application, the tray 20 also includes an insulating film 23, which is connected to the base plate 2121. The insulating film 23 is arranged on the side of the base plate 2121 facing the battery pack 10, and the insulating film 23 is adhered to the contour of the main body 2121a and the contour of the glue limiting boss 2121b; the insulating film 23 is connected to the battery pack 10 on the side away from the base plate 2121, and the orthographic projection of the end of the battery pack 10 connected to the insulating film 23 along the first direction Z overlaps with the orthographic projection of the insulating film 23 along the first direction Z.

[0062] In the embodiment of the present application, the insulating film 23 is provided to isolate the battery pack 10 from the bottom plate 2121, and the insulating film 23 is attached to the profile of the main body 2121a and the profile of the adhesive limiting boss 2121b. It can be understood that in order to protect the battery pack 10, the insulating film 23 covers the main body 2121a and the limiting boss. Specifically, the insulating film 23 is provided on the side of the main body 2121a and the adhesive limiting boss 2121b facing the battery pack 10. In practical applications, the battery pack 10 can be connected to the main body 2121a, the battery pack 10 can also be connected to the main body 2121a and the adhesive limiting boss 2121b, and the battery pack 10 can also be connected to the main body 2121a and contact the adhesive limiting boss 2121b. Furthermore, the orthographic projection of the end of the battery pack 10 connected to the insulating film 23 along the first direction Z overlaps with the orthographic projection of the insulating film 23 along the first direction Z, so that insulation protection between the ends of the battery pack 10 connected to each other and the main body 2121a can be achieved, which has the effect of achieving electrical insulation between the battery pack 10 and the first frame 212. The insulating film 23 is arranged on one side of the adhesive limiting boss 2121b, which has the beneficial effect of further improving the electrical insulation between the battery pack 10 and the tray 20.

[0063] Optionally, in an embodiment of the present application, the length of the insulating film 23 along the second direction X is L3, and the overlapping length of the orthographic projection of the insulating film 23 along the first direction Z and the orthographic projection of the battery pack 10 along the first direction Z along the second direction X is L4; wherein, L3>L4, and L3-L4<L4.

[0064] In the embodiment of the present application, the insulating film 23 is mainly used to isolate the battery pack 10 from the tray 20. However, in actual applications, in order to prevent the edge of the battery pack 10 from exceeding the range of the insulating film 23 due to slight displacement of the battery pack 10 during use, the insulating film 23 is generally set to a length exceeding the end of the battery pack 10. Similarly, in order to reduce costs, the length of the insulating film 23 exceeding the end of the battery pack 10 should not be too much. Further, the length of the insulating film 23 exceeding the end of the battery pack 10 generally does not exceed the overlapping length of the orthographic projection of the insulating film 23 along the first direction Z and the orthographic projection of the battery pack 10 along the first direction Z along the second direction X.

[0065] Exemplarily, the length L3 of the insulating film 23 along the second direction X may be 700 mm, and the overlapping length L4 of the orthographic projection of the insulating film 23 along the first direction Z and the orthographic projection of the battery pack 10 along the first direction Z along the second direction X may be 500 mm. Further, the orthographic projection of the insulating film 23 along the first direction Z also includes a portion extending from the end of the battery pack 10 in the second direction X away from the battery pack 10, and the length of the above portion may be 200 mm.

[0066] Optionally, in an embodiment of the present application, the tray 20 further includes a plurality of beams 24, which are arranged in the accommodating cavity 215 at intervals along the third direction Y, and the two ends of the beams 24 are respectively connected to the first frame 212, and the beams 24 are crimped to the insulating film 23, and the plurality of beams 24 divide the accommodating cavity 215 into a plurality of accommodating sub-cavities; the battery pack 10 includes a plurality of battery sub-groups, and the battery sub-groups are arranged in the accommodating sub-cavities; wherein the third direction Y, the second direction X and the first direction Z are perpendicular to each other.

[0067] In the embodiment of the present application, the crossbeam 24 is used to separate the accommodating cavity 215, and is also used to connect the battery pack to other components. Specifically, the crossbeam 24, as a connector connected to external components, has the function of improving the structural strength and stability of the entire battery pack, while providing corresponding accommodating sub-cavities for multiple battery sub-groups. The provision of multiple battery sub-groups can effectively reduce the voltage of the battery pack 10 and improve the thermal safety performance. At the same time, the crossbeam 24 crimped to the insulating film 23 can improve the insulation capacity under thermal safety, which has the beneficial effect of preventing insulation failure at high temperatures.

[0068] It should be noted that there can be three or four cross beams 24 , and the number of cross beams 24 can be determined according to actual conditions. This embodiment does not impose any limitation on the specific number of cross beams 24 .

[0069] Furthermore, the above-mentioned supporting plate 211, side plate 2122, second frame 213, third frame 214 and crossbeam 24 can all be structures with cavities inside while ensuring their own supporting strength, which has the effect of reducing the overall weight of the battery pack.

[0070] Optionally, in an embodiment of the present application, an electrical device is also provided, comprising the battery pack as described above.

[0071] In the embodiment of the present application, by arranging the reinforcing portion 22 on the side of the body 21 away from the battery pack 10, and the reinforcing portion 22 protrudes from the body 21 in the direction away from the battery pack 10 along the first direction Z, it can be understood that the arrangement of the reinforcing portion 22 increases the thickness of the body 21 along the first direction Z, thereby improving the strength of the body 21. Further, the orthographic projection of the end of the battery pack 10 connected to the body 21 along the first direction Z overlaps with the orthographic projection of the reinforcing portion 22 along the first direction Z, that is, the end of the battery pack 10 that is prone to failure is connected to the body 21, and is indirectly connected through the body 21 and the reinforcing portion 22, which has the beneficial effect of improving the connection strength between the battery pack 10 and the tray 20 and reducing the risk of end connection failure of the battery pack 10 in the battery pack.

[0072] Specifically, the electrical equipment may include energy storage equipment, vehicles, drones, etc. Vehicles include but are not limited to pure electric vehicles, hybrid vehicles, extended-range electric vehicles, and the like.

[0073] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0074] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A battery pack, characterized in that: The invention comprises a battery pack (10) and a tray (20), wherein the battery pack (10) and the tray (20) are connected along a first direction, the tray (20) comprises a body (21), the body (21) encloses a receiving cavity (215), and the battery pack (10) is arranged in the receiving cavity (215); A portion of the body (21) extends and protrudes along the first direction away from the battery pack (10) to form a reinforcement portion (22); The orthographic projection of the end of the battery pack (10) connected to the body (21) along the first direction overlaps with the orthographic projection of the reinforcing portion (22) along the first direction.

2. The battery pack according to claim 1, characterized in that: The body (21) comprises a carrying plate (211) and two first frames (212), the two first frames (212) are arranged opposite to each other along a second direction, and the carrying plate (211) and the two first frames (212) are respectively connected and used to enclose and form the accommodating cavity (215); A portion of the first frame (212) extends and protrudes along the first direction away from the battery pack (10) to form the reinforcement portion (22); The second direction is perpendicular to the first direction.

3. The battery pack according to claim 2, characterized in that: A flow channel is provided inside the carrier plate (211), the flow channel being used to accommodate a heat exchange medium, and a portion of the battery pack (10) is connected to the carrier plate (211).

4. The battery pack according to claim 2, characterized in that: The first frame (212) comprises a bottom plate (2121) and a side plate (2122); the side plate (2122) is connected to the end of the bottom plate (2121) away from the carrier plate (211); the side plate (2122) protrudes from the bottom plate (2121) in a direction approaching the battery pack (10); the battery pack (10) is connected to the bottom plate (2121); the reinforcing portion (22) is arranged on a side of the bottom plate (2121) away from the battery pack (10), and the reinforcing portion (22) protrudes from the bottom plate (2121) in a direction away from the battery pack (10) along the first direction.

5. The battery pack according to claim 4, characterized in that: The overlapping length of the orthographic projection of the battery pack (10) along the first direction and the orthographic projection of the reinforcing portion (22) along the first direction along the second direction is L1, wherein 8 mm ≤ L1 ≤ 100 mm.

6. The battery pack according to claim 5, characterized in that: The battery pack (10) has a length L2 extending along the second direction, wherein 0.8%≤L1 / L2≤30%.

7. The battery pack according to any one of claims 4 to 6, characterized in that: The bottom plate (2121) comprises a main body (2121a) and a glue limiting boss (2121b), the glue limiting boss (2121b) being connected to the main body (2121a), the glue limiting boss (2121b) being arranged on a side of the main body (2121a) facing the battery pack (10), and the glue limiting boss (2121b) protrudes from the main body (2121a) in a direction close to the battery pack (10) along the first direction, and the side plate (2122), the main body (2121a) and the glue limiting boss (2121b) are used to enclose and form a glue groove (2123); The orthographic projection of the end of the battery pack (10) connected to the main body (2121a) along the first direction overlaps with the orthographic projection of the glue groove (2123) along the first direction.

8. The battery pack according to claim 7, characterized in that: The tray (20) further comprises an insulating film (23), the insulating film (23) being connected to the bottom plate (2121), the insulating film (23) being arranged on a side of the bottom plate (2121) facing the battery pack (10), the insulating film (23) being attached to the profile of the main body (2121a) and the profile of the adhesive limiting boss (2121b); The insulating film (23) is connected to the battery pack (10) at a side facing away from the bottom plate (2121), and the orthographic projection of the end of the battery pack (10) connected to the insulating film (23) along the first direction overlaps with the orthographic projection of the insulating film (23) along the first direction.

9. The battery pack according to claim 8, characterized in that: The thickness of the reinforcement portion (22) along the first direction is H, 1 mm ≤ H ≤ 10 mm; And / or, the thickness of the adhesive limiting boss (2121b) along the first direction is h, 0.2mm≤h≤2mm.

10. The battery pack according to claim 9, characterized in that: The length of the insulating film (23) along the second direction is L3, and the overlapping length of the orthographic projection of the insulating film (23) along the first direction and the orthographic projection of the battery pack (10) along the first direction along the second direction is L4; Among them, L3>L4, and L3-L4<L4.

11. The battery pack according to any one of claims 4 to 6, characterized in that: The tray (20) further comprises a plurality of cross beams (24), wherein the plurality of cross beams (24) are arranged in the accommodating cavity (215) at intervals along the third direction, and the two ends of the cross beams (24) are respectively connected to the first frame (212), and the plurality of cross beams (24) divide the accommodating cavity (215) into a plurality of accommodating sub-cavities; The battery pack (10) comprises a plurality of battery sub-packs, and the battery sub-packs are correspondingly arranged in the accommodating sub-cavities; The third direction, the second direction and the first direction are perpendicular to each other.

12. An electrical device, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 11.

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