Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, the battery pack has a first direction and a second direction which are intersected, the battery pack comprises a box body, a plurality of battery packs and a first connecting piece, the box body is provided with an accommodating cavity, the plurality of battery packs are arranged in the accommodating cavity, the plurality of battery packs are arranged along the second direction, and each battery pack comprises a plurality of battery monomers arranged along the first direction; the first connecting pieces are respectively connected with a plurality of battery packs arranged along a second direction; the first connecting piece comprises at least two connecting parts and at least one buffering part, the buffering part is arranged on one side of the battery pack along the first direction, and the at least two connecting parts are arranged at intervals along the second direction; every two adjacent connecting parts are connected with one buffer part, and at least parts of the two connecting parts are arranged on the sides, facing the battery pack, of the buffer parts in an extending mode; in the second direction, one battery pack is arranged between every two adjacent connecting parts, and the two connecting parts are connected with the battery pack. The capacity of the battery pack can be improved, and the safety and the service life of the battery pack are ensured.

Description

Technical Field

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

[0002] As the power source for new energy vehicles, the capacity of the battery pack directly determines the vehicle's range. The battery pack is typically installed under the vehicle body, but due to the limited length and width of the mounting area, the battery pack's capacity is limited. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides a battery pack, aiming to solve the problem of low capacity of existing battery packs; another purpose of an embodiment of the present application is to provide an electrical device.

[0004] Technical solution: A battery pack according to an embodiment of the present application has a first direction and a second direction intersecting each other, including:

[0005] A box body having a receiving cavity;

[0006] A plurality of battery packs are disposed in the accommodating cavity, the plurality of battery packs are arranged along the second direction, and the battery packs include a plurality of battery cells arranged along the first direction;

[0007] A first connecting member is respectively connected to the multiple battery packs arranged along the second direction; the first connecting member includes at least two connecting parts and at least one buffer part, the buffer part is arranged on one side of the battery pack along the first direction, and at least two of the connecting parts are arranged at intervals along the second direction; two adjacent connecting parts are connected to one buffer part, and at least parts of the two connecting parts are extended and arranged on the side of the buffer part facing the battery pack; along the second direction, one battery pack is arranged between two adjacent connecting parts, and each battery pack is connected to one connecting part.

[0008] In some embodiments, the buffer portion includes:

[0009] at least two connecting segments, spaced apart along the second direction, each connecting segment being connected to an adjacent connecting portion;

[0010] The buffer segment is arranged between two adjacent connecting segments along the second direction and is respectively connected to the two adjacent connecting segments. The buffer segment can be deformed along the second direction when subjected to an extrusion force along the second direction.

[0011] In some embodiments, the buffer segment includes a protrusion and a first groove, the protrusion protrudes along the first direction on one side of the connecting segment, and the first groove is recessed toward the protrusion along the first direction.

[0012] In some embodiments, the first connecting member further includes an extension portion, and the extension portion is disposed on a side of the connecting section away from the connecting portion.

[0013] In some embodiments, the buffer portion and the connecting portion are integrally connected.

[0014] In some embodiments, the battery pack further includes a plurality of second connectors, and at least some of the second connectors are connected to two adjacent battery cells along the first direction.

[0015] In some embodiments, the buffer portion and the connecting portion are integrally connected, and / or the connecting section and the buffer section are integrally connected.

[0016] In some embodiments, the battery cell comprises:

[0017] The housing has a second groove and a fixing hole, wherein the second groove is provided on one side of the housing along the second direction; the fixing hole passes through the bottom of the second groove along the second direction and is in communication with the second groove;

[0018] an electrode terminal, inserted into the fixing hole and connected to the housing, wherein at least a portion of the electrode terminal protrudes from the second groove;

[0019] In which, the two second grooves adjacent to each other along the first direction are connected, and the connecting part is located in the second groove; along the first direction, the electrode terminal of the battery pack close to the connecting part is connected to the connecting part; the second connecting member is located in the second groove, and the second connecting member is connected to the electrode terminals of the two battery cells adjacent to each other along the first direction.

[0020] In some embodiments, the battery pack further includes at least one thermal management component, wherein one of the thermal management components is disposed between two adjacent battery packs along the second direction and is respectively connected to the two battery packs.

[0021] In some embodiments, along the second direction, the size of the portion of the electrode terminal protruding from the second groove after being connected to the connecting portion is a mm, the size of the portion of the electrode terminal protruding from the second groove after being connected to the second connecting member is b mm, and the size of the second groove is c mm, satisfying: c>a, and c>b.

[0022] Accordingly, an electrical device described in an embodiment of the present application includes a battery pack as described in any one of the aforementioned embodiments, and the battery pack is used to supply power to the electrical device.

[0023] Beneficial Effects: Compared to the prior art, the present invention provides a battery pack having intersecting first and second directions, comprising a housing, multiple battery packs, and a first connector. The housing has a receiving cavity, multiple battery packs are disposed in the receiving cavity, and the multiple battery packs are arranged along the second direction. The battery pack includes multiple battery cells arranged along the first direction. The first connector is respectively connected to the multiple battery packs arranged along the second direction. The first connector includes at least two connecting portions and at least one buffer portion. The buffer portion is disposed on one side of the battery pack along the first direction, and the at least two connecting portions are spaced apart along the second direction. Two adjacent connecting portions are connected to a buffer portion, and at least portions of the two connecting portions protrude from the side of the buffer portion facing the battery pack. Along the second direction, a battery pack is disposed between two adjacent connecting portions, and each battery pack is connected to a connecting portion. By providing the first connector, the present invention enables the multiple battery packs to be arranged and connected in the height direction, thereby increasing the battery pack capacity even when the length and width dimensions of the battery pack are limited. The buffer portion also absorbs vibration and impact forces between two adjacent connecting portions, effectively ensuring the stability of the connection between the connecting portion and the battery pack, thereby improving the safety of the battery pack.

[0024] Compared to the prior art, an electrical device according to an embodiment of the present application includes a battery pack as described in any of the aforementioned embodiments, the battery pack being used to power the electrical device. It is understood that the electrical device has all the technical features and effects of the aforementioned battery packs, and no further details are given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the overall structure of a battery pack according to an embodiment of the present application;

[0027] Figure 2 is an exploded view of a battery pack according to an embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of the structure of a battery pack stack according to an embodiment of the present application;

[0029] Figure 4 is an exploded view of a battery pack, a first connector, and a second connector according to an embodiment of the present application;

[0030] Figure 5 This is a schematic structural diagram of a first connecting member according to an embodiment of the present application;

[0031] Figure 6 yes Figure 5 Exploded view of part A;

[0032] Figure 7 This is a schematic structural diagram of a battery cell according to an embodiment of the present application;

[0033] Figure 8 This is a schematic diagram of a structure of multiple battery packs connected in series according to an embodiment of the present application;

[0034] Figure 9 This is a schematic diagram of a structure in which a plurality of battery packs are arranged in a second direction and connected in parallel according to an embodiment of the present application;

[0035] Figure 10 is a structural schematic diagram of another first connecting member in an embodiment of the present application;

[0036] Figure 11 is a top view of a battery pack according to an embodiment of the present application after the battery packs are arranged along the second direction;

[0037] Figure 12 is a side view of a battery pack of an embodiment of the present application, wherein the battery packs are arranged along the second direction;

[0038] Figure 13 yes Figure 11 Partial section view along section line AA.

[0039] Figure markings: 1. Box body; 11. Accommodating cavity; 2. Battery pack; 21. Battery cell; 211. Shell; 2111. Second groove; 2112. Fixing hole; 212. Electrode terminal; 3. First connecting member; 31. Connecting portion; 32. Buffer portion; 321. Connecting section; 322. Buffer section; 3221. Protrusion; 3222. First groove; 33. Extension portion; 4. Second connecting member; 5. Thermal management component; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0040] 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 embodiments described are only 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 those skilled in the art without making creative efforts are within the scope of protection of this application.

[0041] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined. In the description of this application, "vertical" means completely vertical at 90° or almost completely vertical, for example, an angle within the range of 80° to 100° is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel, for example, an angle within 10° of completely parallel is considered parallel.

[0042] It should also be noted that in the drawings of this application, arrows marked X indicate a first direction X, arrows marked Y indicate a second direction Y, and arrows marked Z indicate a third direction Z. The first direction X, second direction Y, and third direction Z are introduced to facilitate description of the structural positional relationships of the battery pack and to facilitate understanding of its structure. In the embodiments of this application, the first direction X is the arrangement direction of multiple battery cells within a battery pack and is also the length direction of the battery pack; the second direction Y is the direction in which multiple battery packs are stacked and connected and is also the height direction of the battery pack; and the third direction Z is the width direction of the battery pack. The first direction X, second direction Y, and third direction Z intersect with each other. Furthermore, the first direction X, second direction Y, and third direction Z are mutually perpendicular.

[0043] In related art, a battery pack typically houses multiple battery cells arranged along the length and width of the pack and connected in series and / or parallel. The electrode terminals of the battery cells are positioned toward the top cover or bottom plate of the pack, facilitating their arrangement and connection in series and / or parallel. However, in many cases, the limitations of the circular mounting structure restrict the length and width of the pack, limiting its capacity.

[0044] In view of this, an embodiment of the present application provides a battery pack to solve the above problems.

[0045] Please refer to Figures 1-6An embodiment of the present application provides a battery pack having an intersecting first direction X and a second direction Y, comprising a housing 1, a plurality of battery packs 2, and a first connector 3. The housing 1 has a receiving cavity 11. The plurality of battery packs 2 are disposed in the receiving cavity 11. The plurality of battery packs 2 are arranged along the second direction Y. The battery packs 2 include a plurality of battery cells 21 arranged along the first direction X. The first connector 3 is respectively connected to the plurality of battery packs 2 arranged along the second direction Y. The first connector 3 includes at least two connecting portions 31 and at least one buffer portion 32. The buffer portion 32 is disposed on one side of the battery pack 2 along the first direction X. The at least two connecting portions 31 are spaced apart along the second direction Y. Two adjacent connecting portions 31 are connected to one buffer portion 32. At least portions of the two connecting portions 31 extend on a side of the buffer portion 32 facing the battery pack 2. Along the second direction Y, a battery pack 2 is disposed between two adjacent connecting portions 31, and each battery pack 2 is connected to one connecting portion 31.

[0046] In the embodiment of the present application, by providing a first connecting member 3, multiple battery packs 2 are arranged and connected in the height direction, thereby increasing the battery pack capacity when the length and width dimensions of the battery pack are limited. At the same time, the buffer portion 32 is used to absorb the vibration impact force between two adjacent connecting portions 31, effectively ensuring the stability of the connection between the connecting portion 31 and the battery pack 2, thereby improving the safety of the battery pack.

[0047] Specifically, the battery pack 2 includes a plurality of battery cells 21 arranged along a first direction X, wherein the plurality of battery cells 21 can be connected in series to form a battery pack 2, two adjacent connecting portions 31 of the first connecting member 3 connect the battery pack 2 arranged along a second direction Y, and the buffer portion 32 is connected between the two connecting portions 31, thereby realizing the connection between two adjacent battery packs 2 along the second direction Y. In an embodiment of the present application, by arranging a plurality of battery packs 2 in the height direction, specifically, a plurality of battery packs 2 can be stacked, thereby further increasing the capacity of the battery pack when the length and width dimensions of the battery pack are limited, thereby improving the battery life of the battery pack.

[0048] Furthermore, since multiple battery packs 2 are arranged along the second direction Y, the buffer portion 32 connects two adjacent connecting portions 31. When the battery pack is subjected to vibration force along the second direction Y, the buffer portion 32 can absorb and buffer the vibration force, thereby reducing the possibility of tearing at the connection between the connecting portion 31 and the battery pack 2 caused by the vibration force, thereby improving the safety of the battery pack.

[0049] It should be noted that, in the embodiment of the present application, the multiple battery packs 2 can be arranged along the second direction Y, or the multiple battery packs 2 can be divided into at least two parts according to the size of the accommodating cavity 11, each part is arranged along the first direction X and the third direction Z, and at least two parts are arranged along the second direction Y. Figure 3 and Figure 4An embodiment in which two battery packs 2 are stacked along the second direction Y is shown. Figure 8 and Figure 9 An embodiment in which three battery packs 2 are stacked along the second direction Y is shown.

[0050] Please refer to Figure 5 and Figure 6 In some embodiments, the buffer portion 32 includes a buffer segment 322 and at least two connecting segments 321. The two connecting segments 321 are arranged at intervals along the second direction Y, and each connecting segment 321 is connected to an adjacent connecting portion 31; the buffer segment 322 is arranged between two adjacent connecting segments 321 along the second direction Y and is respectively connected to the two adjacent connecting segments 321. The buffer segment 322 can be deformed along the second direction Y when subjected to an extrusion force along the second direction Y.

[0051] In the embodiment of the present application, the two connecting sections 321 are respectively connected to the two adjacent connecting parts 31 in a one-to-one correspondence, and are used to support the two connecting parts 31. Before the first connector 3 is assembled with the battery pack 2 and welded, the relative position between the connecting part 31 and the electrode terminal 212 of the battery cell 21 at the end of the battery pack 2 is ensured to be fixed, so as to facilitate the subsequent welding connection between the connecting part 31 and the electrode terminal 212. A buffer section 322 is provided between the two connecting sections 321 to achieve the connection between the two adjacent connecting parts 31. The buffer section 32 can absorb the impact force along the second direction Y when the battery pack is subjected to vibration impact, reduce the traction of the two connecting sections 321 on their respective connecting parts 31, and thus reduce the possibility of fracture at the connection between the connecting part 31 and the battery pack 2, thereby ensuring the service life of the battery pack and improving the safety of the battery pack.

[0052] like Figure 6 As shown, in some embodiments, the buffer section 322 includes a protrusion 3221 and a first groove 3222 . The protrusion 3221 protrudes along the first direction X on one side of the connecting section 321 , and the first groove 3222 is recessed along the first direction X toward the protrusion 3221 .

[0053] In the embodiment of the present application, by providing a protrusion 3221 and a first groove 3222 to cooperate with each other, a local bending of the buffer portion 32 is achieved. Therefore, when the battery pack is subjected to a vibration impact along the second direction Y, the local bending formed by the protrusion 3221 and the first groove 3222 can be used to compress or stretch along the second direction Y, thereby absorbing the impact force and avoiding tearing damage to the welding connection between the connecting portion 31 and the electrode terminal 212, thereby ensuring the safety and service life of the battery pack.

[0054] It should be noted that, in the embodiment of the present application, there may be multiple protrusions 3221 and multiple first grooves 3222, and the first grooves 3222 and the first protrusions 3221 correspond one to one, so that multiple local bends can be formed, thereby improving the buffering and energy absorption effect.

[0055] It should also be noted that the protrusion 3221 preferably protrudes toward the side away from the battery pack 2. At this time, when the buffer portion 32 is compressed to absorb energy, the protrusion 3221 will not move toward the battery pack 2, thereby avoiding the protrusion 3221 from abutting against the battery cell 21 of the battery pack 2 to damage the battery cell 21.

[0056] In some embodiments, the first connecting member 3 further includes an extending portion 33 , which is disposed on a side of the connecting section 321 away from the connecting portion 31 .

[0057] In the embodiment of the present application, by arranging the extension portion 33 , it is possible to facilitate the series or parallel output of multiple battery packs 2 arranged along the second direction Y, thereby increasing the adjustable output power of the battery packs 2 arranged along the second direction Y.

[0058] Specifically, if the ends of the battery packs 2 facing away from the first connector 3 are connected to the pole pieces, then individual output of each battery pack 2 can be achieved. If multiple battery packs 2 are also connected to a first connector 3 at their ends facing away from the first connector 3 along the first direction X, then multiple battery packs 2 can be output in parallel. Of course, the number of battery packs 2 can also be greater than or equal to three, and the number of connecting portions 31 of the corresponding first connector 3 is equal to the number of battery packs 2. In this case, the first connector 3 is connected to the multiple battery packs 2 in a one-to-one correspondence through the multiple connecting portions 31, and multiple battery packs 2 are connected at their ends away from the first connector 3. In this case, the output mode of the multiple battery packs 2 is that some battery packs 2 output in parallel, while some battery packs 2 output individually.

[0059] Of course, in the embodiment of the present application, when the number of battery packs 2 is greater than or equal to three, multiple battery packs 2 arranged along the second direction Y can also be connected in series, wherein the series connection can be achieved using a first connector 3 having only two connecting portions 31. Specifically, the battery packs 2 can be connected in a serpentine shape along the second direction Y. Taking three battery packs 2 as an example, the battery packs 2 arranged in a direction away from the bottom plate are respectively the first battery pack 2, the second battery pack 2, and the third battery pack 2, wherein the first battery pack 2 and the second battery pack 2 are connected to a first connector 3, and the end of the second battery pack 2 away from the first connector 3 is connected to the third battery pack 2, thereby achieving the series connection of the three battery packs 2.

[0060] like Figure 5 and Figure 10 As shown, in some embodiments, the buffer portion 32 and the connecting portion 31 are integrally connected.

[0061] In the embodiment of the present application, the buffer portion 32 is integrally connected to the connecting portion 31. In this case, the first connecting member 3 is an integrally formed structure, which can be specifically formed by integrally stamping and cutting an aluminum profile. In this case, the connector can be quickly produced and formed, and the remaining subsequent processing steps are required. At the same time, the first connecting member 3 is integrally formed, eliminating the intermediate welding point, and can ensure that the entire flow of the first connecting member 3 is uniform. This avoids the problem of large local internal resistance at the welding seam position. Furthermore, when the connecting section 321 and the buffer section 322 of the buffer portion 32 can also be integrally formed, it is more convenient to transmit force.

[0062] Please refer to Figure 3 、 Figure 4 、 Figure 8 、 Figure 9 and Figure 11 In some embodiments, the battery pack further includes a plurality of second connectors 4 , and at least some of the second connectors 4 are connected to two battery cells 21 adjacent to each other along the first direction X.

[0063] In the embodiment of the present application, the second connector 4 can be used to connect multiple battery cells 21 within each battery pack 2. Specifically, the second connector 4 can connect the battery cells 21 along the second direction Y, thereby achieving conductive connectivity between the multiple battery packs 2. Furthermore, the second connector 4 extends along the first direction X, which can reduce space occupied along the second direction Y.

[0064] Please refer to Figure 7 and Figure 12 In some embodiments, the battery cell 21 includes a shell 211 and an electrode terminal 212, the shell 211 has a second groove 2111 and a fixing hole 2112, the second groove 2111 is arranged on one side of the shell 211 along the second direction Y; the fixing hole 2112 passes through the bottom of the second groove 2111 along the second direction Y and is connected to the second groove 2111; the electrode terminal 212 is passed through the fixing hole 2112 and is connected to the shell 211, and at least a portion of the electrode terminal 212 protrudes into the second groove 2111; wherein, two second grooves 2111 adjacent to each other along the first direction X are connected, and the connecting portion 31 is located in the second groove 2111; along the first direction X, the electrode terminal 212 of the battery pack 2 close to the connecting portion 31 is connected to the connecting portion 31; the second connecting member 4 is located in the second groove 2111, and the second connecting member 4 is connected to the electrode terminals 212 of two battery cells 21 adjacent to each other along the first direction X.

[0065] In the embodiment of the present application, by providing a second groove 2111 to accommodate the electrode terminal 212, the size occupied by the electrode terminal 212 along the second direction Y can be effectively reduced, thereby facilitating the arrangement of the battery pack 2 along the second direction Y, and improving the space utilization of the accommodating cavity 11 along the second direction Y, which is beneficial to improving the volume energy density of the battery pack.

[0066] Specifically, the electrode terminal 212 of a conventional battery cell 21 typically protrudes outside the lithium battery cell 21 , so the electrode terminal 212 also occupies the size of the battery cell 21 itself along the second direction Y. Furthermore, the protruding electrode terminal 212 also needs to be connected to a connector, further occupying the size in the second direction Y. The present application provides a second groove 2111 on one side of the battery cell 21 along the second direction Y, which allows the electrode terminal 212 to be sunken in the second direction Y, or even sunk below the opening of the second groove 2111. At this point, the electrode terminal 212 does not occupy the size of the battery cell 21 along the second direction Y at all, facilitating the grouping of the battery cells 21 and the arrangement of the battery pack 2 along the second direction Y. This can reduce the space occupied by the battery cells 21 along the second direction Y, thereby increasing the volumetric energy density of the battery pack.

[0067] like Figure 12 As shown, in some embodiments, the battery pack further includes at least one thermal management component 5 , wherein one thermal management component 5 is disposed between two adjacent battery packs 2 along the second direction Y and is connected to the two battery packs 2 , respectively.

[0068] In the embodiment of the present application, by placing a thermal management component 5 between two adjacent battery packs 2 along the second direction Y, the adjacent battery packs 2 can be effectively cooled, further improving the safety of the battery pack.

[0069] It should be noted that the battery pack 2 is arranged along the second direction Y. Therefore, to minimize the size of the battery pack along the second direction Y, the battery cells 21 are preferably rectangular, with the two large faces of the battery cells 21 facing each other along the second direction Y. In this way, the small faces of the battery cells 21 are located on both sides along the first direction X and the third direction Z. In this case, the size of the battery cells 21 along the second direction Y is relatively small, and the large faces of the battery cells 21 are in contact with the thermal management component 5, which can achieve better heat exchange and cooling effects. In addition, the large faces are used for stacking, which can improve the stability of the battery pack 2 when stacked along the second direction Y.

[0070] like Figure 13 As shown, in some embodiments, along the second direction Y, the size of the portion of the electrode terminal 212 protruding from the second groove 2111 after being connected to the connecting portion 31 is a mm, the size of the portion of the electrode terminal 212 protruding from the second groove 2111 after being connected to the second connecting member 4 is b mm, and the size of the second groove 2111 is cmm, satisfying: c>a, and c>b.

[0071] In the embodiment of the present application, the size of the portion of the electrode terminal 212 protruding from the second groove 2111 after being welded to the connecting portion 31, and the size of the portion of the electrode terminal 212 protruding from the second groove 2111 after being welded to the second connecting member 4 are both smaller than the size of the second groove 2111. At this time, the connecting portion 31 and the second connecting member 4 can be located in the second groove 2111 along the second direction Y, thereby not affecting the size of the battery cell 21 along the second direction Y, further facilitating the stability of the arrangement of the battery pack 2 along the second direction Y, and also facilitating the thermal management component 5 to be arranged between two adjacent battery packs 2 to maintain structural stability.

[0072] Accordingly, an electrical device described in an embodiment of the present application includes a battery pack as described in any one of the aforementioned embodiments, and the battery pack is used to supply power to the electrical device.

[0073] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0074] Of course, the electrical devices referred to in this application can be application devices such as vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools. Vehicles can be new energy vehicles, which can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. The embodiments of this application do not impose any special restrictions on the above-mentioned electrical devices.

[0075] The above is a detailed introduction to a battery pack and an electrical device provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: Having an intersecting first direction and a second direction, comprising: A box body having a receiving cavity; A plurality of battery packs are disposed in the accommodating cavity, the plurality of battery packs are arranged along the second direction, and the battery packs include a plurality of battery cells arranged along the first direction; A first connecting member is respectively connected to the multiple battery packs arranged along the second direction; the first connecting member includes at least two connecting parts and at least one buffer part, the buffer part is arranged on one side of the battery pack along the first direction, and at least two of the connecting parts are arranged at intervals along the second direction; two adjacent connecting parts are connected to one buffer part, and at least part of the connecting part is extended and arranged on the side of the buffer part facing the battery pack; along the second direction, one battery pack is arranged between two adjacent connecting parts, and each battery pack is connected to one connecting part.

2. The battery pack according to claim 1, wherein: The buffer portion includes: at least two connecting segments, spaced apart along the second direction, each connecting segment being connected to an adjacent connecting portion; The buffer segment is arranged between two adjacent connecting segments along the second direction and is respectively connected to the two adjacent connecting segments. The buffer segment can be deformed along the second direction.

3. The battery pack according to claim 2, wherein: The buffer section includes a protrusion and a first groove, wherein the protrusion protrudes along the first direction on one side of the connecting section, and the first groove is recessed toward the protrusion along the first direction.

4. The battery pack according to claim 2, wherein: The first connecting member further includes an extending portion, which is arranged on a side of the connecting section away from the connecting portion.

5. The battery pack according to claim 1, wherein: The buffer portion and the connecting portion are integrally connected.

6. The battery pack according to claim 1, wherein: The battery pack further includes a plurality of second connectors, at least some of which are connected to two adjacent battery cells along the first direction.

7. The battery pack according to claim 6, characterized in that: The battery cell comprises: The housing has a second groove and a fixing hole, wherein the second groove is provided on one side of the housing along the second direction; the fixing hole passes through the bottom of the second groove along the second direction and is in communication with the second groove; an electrode terminal, inserted into the fixing hole and connected to the housing, wherein at least a portion of the electrode terminal protrudes from the second groove; In which, the two second grooves adjacent to each other along the first direction are connected, and the connecting part is located in the second groove; along the first direction, the electrode terminal of the battery pack close to the connecting part is connected to the connecting part; the second connecting member is located in the second groove, and the second connecting member is connected to the electrode terminals of the two battery cells adjacent to each other along the first direction.

8. The battery pack according to claim 7, characterized in that: The battery pack further includes at least one thermal management component, wherein one of the thermal management components is disposed between two adjacent battery packs along the second direction and is respectively connected to the two battery packs.

9. The battery pack according to claim 7, characterized in that: Along the second direction, the size of the portion of the electrode terminal protruding from the second groove after being connected to the connecting portion is a mm, the size of the portion of the electrode terminal protruding from the second groove after being connected to the second connecting member is b mm, and the size of the second groove is c mm, satisfying: c>a, and c>b.

10. An electrical device, characterized in that: Comprising a battery pack as described in any one of claims 1 to 9, the battery pack is used to power the electrical device.

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