Battery pack and electric device

Abstract

The utility model provides a battery pack and an electric device. The battery pack comprises a box body and a plurality of preformed assemblies, the box body comprises a first structural beam, a second structural beam and a mounting plate. The first structural beam and the second structural beam are sequentially arranged in the first direction. And the mounting plate, the first structural beam and the second structural beam form a first mounting space. Each preformed assembly comprises a battery cell group and two fins. And the battery cell group is fixed between the two fins. The fin includes a first end and a second end. The first end and the second end are both fixedly connected to the mounting plate. And the plurality of preformed assemblies are arranged and fixed in the first mounting space to form the battery module. One side edge of the battery module in the first direction is a first preformed assembly, and the other side edge of the battery module in the first direction is a second preformed assembly. The first preformed assembly abuts against the first structural beam, and the second preformed assembly abuts against the second structural beam. And the preformed assembly can be limited and fixed in the second direction and the first direction, so that the assembly quality of the battery pack is improved.

Description

Technical Field

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

[0002] A battery module can include multiple rows of cells stacked in the same direction. During the battery pack assembly process, one or more rows of cells are taken as the minimum assembly unit. After all cells are boxed, they are assembled in the battery pack box to form a battery module.

[0003] In the related art, before the battery module is assembled, multiple rows of battery cells may be displaced or shaken in the box, affecting the reliability of the battery module assembly and thus affecting the assembly quality of the battery pack. Utility Model Content

[0004] The present application provides a battery pack and an electrical device, which realizes the accurate installation of each column of battery cells in the battery cell group and the battery module in the box, reduces the difficulty of assembling the battery pack, and reduces the time cost of assembly.

[0005] In a first aspect, the present application provides a battery pack comprising: a housing and multiple prefabricated components. The housing may include a first structural beam, a second structural beam, and a mounting plate. The first and second structural beams are arranged sequentially along a first direction, wherein the first direction is the length of the battery pack. The mounting plate is connected to the bottoms of the first and second structural beams and, together with the first and second structural beams, forms a first mounting space. A prefabricated component may include a cell group and two fins. The cell group is secured between the two fins. The fins include a first end and a second end oppositely disposed along a second direction, wherein the second direction is perpendicular to the first direction. The first and second ends are both fixedly connected to the mounting plate. Multiple prefabricated components are arranged sequentially along the first direction and secured within the first mounting space, such that all prefabricated components within the first mounting space constitute a battery module. One side of the battery module in the first direction constitutes the first prefabricated component, and the other side of the battery module in the first direction constitutes the second prefabricated component. The first prefabricated component abuts the first structural beam, and the second prefabricated component abuts the second structural beam.

[0006] Through the first aspect, the battery cell group is fixed between the two fins, so that the battery cell group and the two fins constitute the minimum assembly unit of the battery module. The first end and the second end of the two fins in the prefabricated component are fixedly connected to the mounting plate, which is used to achieve the limitation and fixation of the minimum assembly unit of the battery module in the second direction. The first prefabricated component in the battery module abuts the first structural beam, and the second prefabricated component abuts the second structural beam, which are used to achieve the limitation and fixation of the battery module in the first direction. The minimum assembly unit of the battery module and the limitation and fixation of the battery module in the second direction and the first direction avoid displacement or shaking of the columns of batteries in the battery module and the battery module in the box, improve the reliability of the battery module assembly, and thus improve the assembly quality of the battery pack.

[0007] In one possible design, the battery cell group includes two columns of battery cells, and a buffer is provided between the two columns of battery cells.

[0008] Based on the description of the above embodiment, the battery pack consisting of two rows of battery cells can make the prefabricated assembly have better structural strength. In addition, the buffer provided between the two rows of battery cells is used to absorb the expansion force of the two rows of battery cells.

[0009] In one possible design, the fins may be profiled plates.

[0010] Based on the description of the above embodiment, the profile plate can reduce the weight of the fins, thereby reducing material costs. Furthermore, the cavity in the profile plate can also circulate external air to cool the battery pack.

[0011] In a possible design, the prefabricated assembly may further include two end plates, one end plate being connected to the first ends of the two fins along the second direction, and the other end plate being connected to the second ends of the two fins along the second direction.

[0012] Based on the description of the above embodiments, the combination of the two end plates and the two fins in the prefabricated assembly can completely define the degree of freedom of the battery cell group, thereby ensuring the integrity of the prefabricated assembly and improving the assembly reliability of the prefabricated assembly.

[0013] In one possible design, the end plates are profile plates.

[0014] Based on the description of the above embodiment, the profile plate can reduce the weight of the end plate, thereby reducing material costs. Furthermore, the cavity in the profile plate can also absorb the expansion force of the battery cell group in the first direction.

[0015] In a possible design, the box body may further include a plurality of first connecting members. The first connecting members are L-shaped connecting pieces. The first connecting members may be used to connect the end plate and the mounting plate.

[0016] Based on the description of the above embodiments, the end plate and the mounting plate can be connected via an L-shaped connecting piece, thereby ensuring the reliability of the connection relationship between the end plate and the mounting plate.

[0017] In a possible design, a reinforcing rib is provided on the first connecting member.

[0018] Based on the description of the above embodiment, the reinforcing ribs are used to improve the structural strength of the first connecting member, thereby improving the reliability of the connection.

[0019] In one possible design, the box may further include a third structural beam and a fourth structural beam disposed opposite each other in the second direction. The lengths of the third and fourth structural beams are both oriented in the first direction. One end of the second structural beam is detachably connected to the third structural beam. The other end of the second structural beam is detachably connected to the fourth structural beam.

[0020] Based on the description of the above embodiment, one end of the second structural beam can be detachably connected to the third structural beam, and one end of the second structural beam can be detachably connected to the fourth structural beam, so that the size of the first installation space can be changed to adapt to battery modules of different specifications, thereby making the battery pack universal.

[0021] In one possible design, the box body may further include two second connecting members. The second connecting members are L-shaped connecting pieces. One of the second connecting members is used to connect the second structural beam and the third structural beam, and the other second connecting member is used to connect the second structural beam and the fourth structural beam.

[0022] Based on the description of the above embodiment, the second structural beam and the third structural beam can be connected by an L-shaped connecting piece, thereby ensuring the reliability of the connection relationship between the second structural beam and the third structural beam. Similarly, the second structural beam and the fourth structural beam can be connected by an L-shaped connecting piece, thereby ensuring the reliability of the connection relationship between the second structural beam and the fourth structural beam.

[0023] In a second aspect, the present application provides an electrical device, which may include a battery pack according to any one of the above embodiments. The battery pack is used to provide electrical energy.

[0024] The beneficial effects of the electrical device provided in the second aspect can be referred to the beneficial effects brought about by the first aspect and the various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 This is a schematic diagram of the assembly of a box and a battery module in an embodiment of the present application.

[0027] Figure 2 This is a structural diagram of a box in an embodiment of the present application.

[0028] Figure 3 This is a structural diagram of a prefabricated module in an embodiment of the present application.

[0029] Figure 4 for Figure 3 A view from another perspective.

[0030] Figure 5 for Figure 4 Magnified view of section A.

[0031] Figure 6 for Figure 4 Cross-sectional view taken along direction B.

[0032] Figure 7 for Figure 1 Magnified view of section C.

[0033] Figure 8 for Figure 1 Magnified view of section D in the middle.

[0034] Description of reference numerals:

[0035] 1- box; 11- first structural beam; 12- second structural beam; 13- mounting plate; 14- third structural beam; 15- fourth structural beam; 16- first installation space; 17- second installation space;

[0036] 2-battery module; 21-first prefabricated component; 22-second prefabricated component;

[0037] 221 - battery core; 222 - fin; 222a - first cavity; 223 - buffer; 224 - end plate;

[0038] 3-first connecting member; 31-reinforcement rib;

[0039] 4- second connecting piece;

[0040] X-first direction; Y-second direction. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0043] The terms "comprises", "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0044] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0046] The directional words appearing in the following description are all directions shown in the drawings and do not limit the specific structure of this application. For example, in the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.

[0047] In addition, the expressions indicating directions such as the X direction, Y direction, and Z direction used to illustrate the operation and construction of the various components of this embodiment are not absolute but relative, and although these indications are appropriate when the various components are in the positions shown in the figures, when these positions are changed, these directions should be interpreted differently to correspond to the changes.

[0048] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0049] In the description of this application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two (including two).

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, "connected" or "connected" in a mechanical structure can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection via a fixing member, such as a screw, bolt, or other fixing member. A physical connection can also be a detachable connection, such as a mutual snap-fit ​​connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. "Connected" or "connected" in a circuit structure can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate element, as long as the circuit is interconnected. It can also refer to internal communication between two elements. A signal connection can refer to a signal connection through a circuit or a signal connection through a media medium, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application.

[0051] A battery module can include multiple rows of cells stacked in the same direction. During the battery pack assembly process, one or more rows of cells are taken as the minimum assembly unit. After all cells are boxed, they are assembled in the battery pack box to form a battery module.

[0052] In the related art, before the battery module is assembled, multiple rows of battery cells may be displaced or shaken in the box, affecting the reliability of the battery module assembly and thus affecting the assembly quality of the battery pack.

[0053] Based on this, the present application proposes a battery pack, which prevents the cells from being displaced or shaken in the box by setting two fins in the battery pack to fix the cells in each column of the cell group, thereby achieving accurate installation of the cells in each column of the cell group and the battery module in the box, reducing the difficulty of assembling the battery pack and reducing the time cost of assembly. Figure 1-8 Provide a detailed description.

[0054] First, as Figure 1-Figure 3 As shown, the present application provides a battery pack, including a housing 1 and multiple prefabricated components. The housing 1 may include a first structural beam 11, a second structural beam 12, and a mounting plate 13. The first structural beam 11 and the second structural beam 12 are arranged in sequence along a first direction X. The first direction X is the length direction of the battery pack. The mounting plate 13 is connected to the bottom of the first structural beam 11 and the second structural beam 12, and forms a first mounting space 16 with the first structural beam 11 and the second structural beam 12. A prefabricated component may include a battery cell group and two fins 222. The battery cell group is fixed between the two fins 222. The fin 222 includes a first end and a second end arranged opposite to each other along a second direction Y. The second direction Y is perpendicular to the first direction X. The first end and the second end are both fixedly connected to the mounting plate 13. Multiple prefabricated components are arranged in sequence along the first direction X and fixed in the first mounting space 16, so that all prefabricated components in the first mounting space 16 constitute a battery module 2. One side of the battery module 2 in the first direction X is a first prefabricated component 21 , and the other side of the battery module 2 in the first direction X is a second prefabricated component 22 . The first prefabricated component 21 abuts against the first structural beam 11 , and the second prefabricated component 22 abuts against the second structural beam 12 .

[0055] Specifically, if Figure 2 As shown, the box body 1 may include a first structural beam 11, a second structural beam 12, a third structural beam 14, a fourth structural beam 15 and a fifth structural beam. The first direction X is the length direction of the battery pack, and the second direction Y is the width direction of the battery pack.

[0056] The first structural beam 11, the second structural beam 12, and the fifth structural beam are arranged sequentially along the first direction X, with the second structural beam 12 located between the first and fifth structural beams. The third structural beam 14 and the fourth structural beam 15 are arranged sequentially along the second direction Y. The first structural beam 11, the second structural beam 12, and the fifth structural beam are each overlapped on the third structural beam 14 and the fourth structural beam 15 at both ends. Furthermore, the third structural beam 14 and the fourth structural beam 15 are each overlapped on the first structural beam 11 and the fifth structural beam at both ends. Based on the above, it can be seen that the first structural beam 11, the third structural beam 14, the fourth structural beam 15, and the fifth structural beam can be the four side beams of the battery pack. The second structural beam 12 divides the battery pack into a first installation space 16 and a second installation space 17 arranged along the first direction X. The first installation space 16 can be used to install the battery module 2, and the second space can be used to install other components of the battery pack, such as the battery management system. In addition, the mounting plate 13 is connected to the bottom of the first structural beam 11, the second structural beam 12, the third structural beam 14, the fourth structural beam 15 and the fifth structural beam, and can provide an installation location for the battery module 2 in the battery pack, the battery management system and other components in the battery pack.

[0057] like Figure 3 As shown, a prefabricated assembly may include a cell group of a battery module 2 and two fins 222 .

[0058] The battery cell group may include one or more rows of battery cells 221. The fins 222 may be long, plate-like structures. The length of the fins 222 is adapted to the length of a row of battery cells 221.

[0059] The battery cell group is fixed between the two fins 222 , so that the battery cell group and the two fins 222 constitute the minimum assembly unit of the battery module 2 .

[0060] The fin 222 includes a first end and a second end that are oppositely disposed along the second direction Y. The first end and the second end are both fixedly connected to the mounting plate 13 , so as to achieve position limiting and fixation of the prefabricated assembly in the second direction Y.

[0061] Furthermore, if Figure 1 As shown, multiple prefabricated components are sequentially arranged along the first direction X and fixed in the first installation space 16, so that all prefabricated components in the first installation space 16 constitute the battery module 2. Figure 1 As shown, the two sides of the battery module 2 in the first direction X are respectively two prefabricated components, one of which is a first prefabricated component 21 and the other is a second prefabricated component 22 .

[0062] The first prefabricated component 21 abuts against the first structural beam 11 , and the second prefabricated component 22 abuts against the second structural beam 12 , so that all prefabricated components in the battery module 2 can be limited and fixed in the first direction X.

[0063] In combination with the above content, it can be seen that the prefabricated components can be limited and fixed in both the second direction Y and the first direction X, so as to prevent the columns of battery cells 221 in the battery module 2 and the battery module 2 from being displaced or shaken in the box 1, thereby improving the reliability of the assembly of the battery module 2 and thus improving the assembly quality of the battery pack.

[0064] In summary, the cell group is fixed between the two fins 222, so that the cell group and the two fins 222 constitute the minimum assembly unit of the battery module 2. The first end and the second end of the two fins 222 in the prefabricated assembly are fixedly connected to the mounting plate 13, which are used to achieve the limitation and fixation of the minimum assembly unit of the battery module 2 in the second direction Y. The first prefabricated assembly 21 in the battery module 2 abuts against the first structural beam 11, and the second prefabricated assembly 22 abuts against the second structural beam 12, which are used to achieve the limitation and fixation of the battery module 2 in the first direction X. The minimum assembly unit of the battery module 2 and the limitation and fixation of the battery module 2 in the second direction Y and the first direction X avoid displacement or shaking of the columns of cells 221 in the battery module 2 and the battery module 2 in the box 1, thereby improving the reliability of the assembly of the battery module 2 and thus improving the assembly quality of the battery pack.

[0065] Specifically, combined Figure 4 and Figure 5 The structure of the battery pack is described in detail:

[0066] In some embodiments, the battery cell group includes two columns of battery cells 221 , and a buffer 223 is disposed between the two columns of battery cells 221 .

[0067] Specifically, when the cell group includes two columns of cells 221 and a buffer 223 is disposed between the two columns of cells 221, one side surface of one column of cells 221 in the first direction X abuts the fin 222, while the other side surface of the other column of cells 221 in the first direction X abuts the buffer 223. During the charge and discharge process, the cells 221 generate expansion forces. The expansion forces acting on one side are absorbed by the fin 222, while the expansion forces acting on the other side are absorbed by the buffer 223.

[0068] According to the description of the above embodiment, the battery pack composed of two rows of cells can make the prefabricated assembly have better structural strength. In addition, the buffer member 223 provided between the two rows of cells 221 is used to absorb the expansion force of the two rows of cells 221.

[0069] Further, combined with Figure 6 The structure of the fin 222 is described in detail:

[0070] The fins 222 may include but are not limited to the following two structures:

[0071] Structure 1: The fin 222 can be a solid plate.

[0072] Structure 2: Figure 6 As shown, the fins 222 may be profiled plates.

[0073] The profile plate can reduce the weight of the fins 222, thereby reducing material costs. Furthermore, the first cavity 222a in the profile plate can also allow external air to circulate to cool the battery pack.

[0074] Furthermore, the structure of the prefabricated components is specifically described:

[0075] like Figure 3 As shown, in some embodiments, the prefabricated assembly may further include two end plates 224. One end plate 224 is connected to the first ends of the two fins 222 along the second direction Y. The other end plate 224 is connected to the second ends of the two fins 222 along the second direction Y.

[0076] The two end plates 224 and the two fins 222 can form a frame, and the battery cell group is placed in the frame, so that the battery cell group is limited in a first direction X by the two fins 222, and the battery cell group is limited in a second direction Y by the two end plates 224. In combination with the above, it can be seen that the freedom of the battery cell group can be fully defined in the frame, thereby ensuring the integrity of the prefabricated assembly and improving the assembly reliability of the prefabricated assembly.

[0077] According to the description of the above embodiment, the two end plates 224 in the prefabricated assembly combined with the two fins 222 can completely define the freedom of the cell group, thereby ensuring the integrity of the prefabricated assembly and improving the assembly reliability of the prefabricated assembly.

[0078] Specifically, the end plate 224 may include but is not limited to the following two structures:

[0079] In structure 1, the end plate 224 is a solid plate.

[0080] In the second structure, the end plate 224 is a profile plate. The profile plate can reduce the weight of the end plate 224, thereby reducing material costs. Furthermore, the second cavity in the profile plate can absorb the expansion force of the battery cell group in the first direction X.

[0081] Furthermore, the connection method between the prefabricated component and the mounting plate 13 is specifically described:

[0082] like Figure 7As shown, in some embodiments, the housing 1 may further include a plurality of first connectors 3. The first connectors 3 are L-shaped connectors and may be used to connect the end plate 224 and the mounting plate 13.

[0083] An L-shaped connector typically consists of two perpendicular parts, forming an "L" shape. This design allows the connector to provide a connection between two perpendicular components. For example, the end plate 224 and the mounting plate 13, which are perpendicular to each other, can be connected using the L-shaped connector.

[0084] Advantages of the L-shaped connector may include small installation space, high structural strength, and simple and convenient installation.

[0085] According to the description of the above embodiment, the end plate 224 and the mounting plate 13 can be connected by an L-shaped connecting piece, thereby ensuring the reliability of the connection relationship between the end plate 224 and the mounting plate 13.

[0086] Furthermore, in some embodiments, a reinforcing rib 31 is provided on the first connecting member 3 .

[0087] According to the description of the above embodiment, the reinforcing rib 31 is used to improve the structural strength of the first connecting member 3, thereby improving the reliability of the connection.

[0088] Furthermore, the number of prefabricated components in battery modules 2 of different specifications is different. This application does not specifically limit the number of prefabricated components in the battery module 2. Therefore, in order to make the battery pack universal for battery modules 2 of different specifications, this application also makes the following improvements:

[0089] like Figure 2 As shown, in some embodiments, the box body 1 may further include a third structural beam 14 and a fourth structural beam 15 arranged opposite to each other in the second direction Y. The length directions of the third structural beam 14 and the fourth structural beam 15 are both in the first direction X. One end of the second structural beam 12 is detachably connected to the third structural beam 14. The other end of the second structural beam 12 is detachably connected to the fourth structural beam 15.

[0090] The detachable connection may include but is not limited to screw connection or riveting connection.

[0091] The length direction of the third structural beam 14 and the fourth structural beam 15 is the first direction X. One end of the second structural beam 12 is detachably connected to the third structural beam 14 , and the other end of the second structural beam 12 is detachably connected to the fourth structural beam 15 , so that the second structural beam 12 has multiple installation positions in the first direction X.

[0092] As can be seen from the above, the second structural beam 12 divides the battery pack into a first installation space 16 and a second installation space 17 arranged along the first direction X. Therefore, the size of the first installation space 16 is related to the installation position of the structural beam in the first direction X. As the installation position of the second structural beam 12 changes, the size of the first installation space 16 also changes, allowing the first installation space 16 to accommodate different numbers of prefabricated components and thus adapt to battery modules 2 of different specifications.

[0093] According to the description of the above embodiment, one end of the second structural beam 12 can be detachably connected to the third structural beam 14, and one end of the second structural beam 12 can be detachably connected to the fourth structural beam 15, so that the size of the first installation space 16 can be changed to adapt to battery modules 2 of different specifications, thereby making the battery pack universal.

[0094] Specifically, if Figure 8 As shown, in some embodiments, the box body 1 may further include two second connectors 4. The second connectors 4 are L-shaped connectors. One of the second connectors 4 is used to connect the second structural beam 12 and the third structural beam 14, and the other second connector 4 is used to connect the second structural beam 12 and the fourth structural beam 15.

[0095] An L-shaped connector typically consists of two perpendicular parts, forming an "L" shape. This design allows the connector to provide a connection between two perpendicular components. For example, the second structural beam 12 and the third structural beam 14, which are both perpendicular to each other, can be connected using an L-shaped connector. The second structural beam 12 and the fourth structural beam 15, which are also both perpendicular to each other, can also be connected using an L-shaped connector.

[0096] Advantages of the L-shaped connector may include small installation space, high structural strength, and simple and convenient installation.

[0097] According to the description of the above embodiment, the second structural beam 12 and the third structural beam 14 can be connected by an L-shaped connecting piece, thereby ensuring the reliability of the connection relationship between the second structural beam 12 and the third structural beam 14. Similarly, the second structural beam 12 and the fourth structural beam 15 can be connected by an L-shaped connecting piece, thereby ensuring the reliability of the connection relationship between the second structural beam 12 and the fourth structural beam 15.

[0098] Furthermore, a reinforcing rib 31 may be provided on the first connecting member 3 to improve the structural strength of the first connecting member 3 , thereby further improving the reliability of the connection.

[0099] In a second aspect, the present application provides an electrical device, which may include a battery pack according to any one of the above embodiments. The battery pack is used to provide electrical energy.

[0100] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0101] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: Cabinet and multiple prefabricated components; The box body includes a first structural beam, a second structural beam and a mounting plate; The first structural beam and the second structural beam are arranged sequentially along a first direction; Wherein, the first direction is the length direction of the battery pack; The mounting plate is connected to the bottom of the first structural beam and the second structural beam, and forms a first mounting space with the first structural beam and the second structural beam; One of the prefabricated components includes a battery cell group and two fins; The battery cell group is fixed between the two fins; The fin includes a first end and a second end disposed opposite to each other along a second direction; wherein the second direction is perpendicular to the first direction; The first end and the second end are both fixedly connected to the mounting plate; The plurality of prefabricated components are sequentially arranged along the first direction and fixed in the first installation space, so that all the prefabricated components in the first installation space form a battery module; One side of the battery module in the first direction is a first prefabricated component, and the other side of the battery module in the first direction is a second prefabricated component; The first prefabricated component abuts against the first structural beam, and the second prefabricated component abuts against the second structural beam.

2. The battery pack according to claim 1, wherein: The battery cell group includes two columns of battery cells; A buffer is provided between the two rows of battery cells.

3. The battery pack according to claim 1, wherein: The fins are profile plates.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The prefabricated assembly further includes two end plates; One of the end plates is connected to the first ends of the two fins along the second direction; Another end plate is connected to the second ends of the two fins along the second direction.

5. The battery pack according to claim 4, characterized in that: The end plate is a profile plate.

6. The battery pack according to claim 4, characterized in that: The box body also includes a plurality of first connecting members; The first connecting member is an L-shaped connecting piece; The first connecting member is used to connect the end plate and the mounting plate.

7. The battery pack according to claim 6, characterized in that: The first connecting member is provided with a reinforcing rib.

8. The battery pack according to any one of claims 1 to 3, characterized in that: The box body further includes a third structural beam and a fourth structural beam arranged opposite to each other in the second direction; The length directions of the third structural beam and the fourth structural beam are both in the first direction; One end of the second structural beam is detachably connected to the third structural beam; The other end of the second structural beam is detachable from the fourth structural beam.

9. The battery pack according to claim 8, characterized in that: The box body also includes two second connecting members; The second connecting member is an L-shaped connecting piece; One of the second connecting members is used to connect the second structural beam and the third structural beam; Another second connecting member is used to connect the second structural beam and the fourth structural beam.

10. An electrical device, characterized in that: A battery pack comprising the battery pack according to any one of claims 1 to 9, wherein the battery pack is used to provide electrical energy.

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