Battery pack and electric device

Abstract

The utility model discloses a battery pack and an electric device, the battery pack comprises a battery pack, an output pole piece, an end plate, a protective cover, a connecting body and a first limiting structure, the output pole piece is arranged on one side, facing the protective cover, of the end plate along a third direction; the end plate is provided with connectors, the connectors are arranged on the two sides of the output pole piece in the second direction, and the connectors are provided with first limiting structures; the two ends of the protective cover in the second direction are clamped to the connecting body respectively, the protective cover is provided with a second limiting structure, and the first limiting structure and the second limiting structure are matched in a concave-convex mode; one of the first limiting structure and the second limiting structure is a limiting rib body, the other one of the first limiting structure and the second limiting structure is a limiting groove, the limiting rib body extends in the third direction, and the two ends, in the first direction, of the limiting rib body make contact with the groove wall of the corresponding limiting groove. Assembly can be achieved without additional auxiliary parts, assembly is easy, and efficient assembly can be achieved in a limited assembly space.

Description

Technical Field

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

[0002] The battery pack outputs current through the output electrode, wherein the output electrode is fixed to the end plate, and a protective cover is connected to the end plate. The protective cover protects the output electrode to prevent the output electrode from touching the external conductor or personnel during transportation or assembly of the battery pack to avoid safety accidents. Based on this, in order to make the protective cover have good protection performance for the output electrode, the protective cover needs to be firmly connected to the end plate. However, the existing connection structure between the protective cover and the end plate is complicated and requires additional auxiliary parts for connection, which makes the assembly complicated. It is not easy to assemble when the assembly space is limited, and the assembly efficiency is low. Utility Model Content

[0003] The primary purpose of the utility model is to provide a battery pack, wherein the protective cover is firmly connected to the end plate.

[0004] In order to achieve the above object, the utility model provides

[0005] A battery pack has a first direction, a second direction and a third direction intersecting in pairs, including a battery pack, an output electrode, an end plate, a protective cover, a connector and a first limiting structure:

[0006] The battery pack includes a plurality of single cells arranged along the first direction, and the single cells include electrode terminals;

[0007] The end plate is connected to the battery pack along the first direction, the end plate is provided with at least two connectors, the connectors are arranged at intervals along the second direction, and the side surface of the connector in the second direction is provided with the first limiting structure;

[0008] One end of the output electrode piece is connected to the electrode terminal, and the other end is disposed on the end plate along the third direction and located between two adjacent connectors along the second direction;

[0009] The two ends of the protective cover in the second direction are respectively provided with third limiting structures which are clamped to the connecting body; the two ends of the protective cover in the second direction are both provided with second limiting structures, the first limiting structure cooperates with the second limiting structure to limit, and the second limiting structure and the third limiting structure are spaced apart along the first direction;

[0010] Among them, one of the first limiting structure and the second limiting structure is a limiting rib body, and the other is a limiting groove. The limiting rib body extends along the third direction, and both ends of the limiting rib body in the first direction are in direct contact with the corresponding groove wall of the limiting groove.

[0011] In a specific embodiment of the utility model, the side surface of the connector in the second direction is provided with a button hole;

[0012] The third limiting structure includes a buckle body, and the buckle bodies are provided at both ends of the protective cover in the second direction, and the buckle bodies are clamped in the buckle holes.

[0013] In a specific embodiment of the utility model, the protective cover includes a cover plate, a first connecting plate and a second connecting plate, the cover plate is located on the side of the output pole piece away from the end plate, the first connecting plate and the second connecting plate are connected to the side of the cover plate facing the end plate, the first connecting plate and the second connecting plate are provided at both ends of the cover plate in the second direction, the first connecting plate and the second connecting plate are arranged at intervals in the first direction, the buckle body is located on the first connecting plate, and the second limiting structure is located on the second connecting plate.

[0014] In a specific embodiment of the utility model, the buckle body is located on the side of the first connecting plate away from the cover plate, the second limiting structure is the limiting groove, the limiting groove passes through the second connecting plate along the second direction, and the end of the limiting groove close to the end plate is an open end.

[0015] In a specific embodiment of the utility model, the protective cover also includes a first protective plate and a second protective plate, and the first protective plate and the second protective plate are respectively arranged at the two ends of the cover plate in the first direction; along the third direction, the first protective plate and the second protective plate are both located on the side of the cover plate facing the end plate.

[0016] In a specific embodiment of the utility model, the second protective plate is provided with a connection port penetrating along the first direction, and the end of the connection port away from the cover plate is an open end;

[0017] The protection cover further includes a protection baffle, which is arranged on the side of the second protection plate facing away from the first protection plate, and the protection baffle is arranged around the outer side of the connection port.

[0018] In a specific embodiment of the present invention, the protection cover further comprises a third protection plate, and the third protection plate is arranged on a side of the first protection plate away from the cover plate.

[0019] In a specific embodiment of the utility model, the first limiting structure is the limiting rib body, the limiting rib body is arranged on the side of the connecting body close to the output pole piece in the second direction, and the buckle hole penetrates the connecting body along the second direction.

[0020] In a specific embodiment of the utility model, the end plate includes a plate body and a protective seat, the protective seat is detachably connected to a side of the plate body facing the output pole piece in the third direction, the protective seat is provided with the connector, and the output pole piece is arranged on the protective seat.

[0021] The utility model also provides an electrical device, comprising the battery pack as described above.

[0022] The battery pack of the present utility model has the following advantages compared with the prior art:

[0023] The battery pack of the utility model includes a battery pack, an output pole piece, an end plate, a protective cover, a connector and a first limiting structure. At least two connectors are provided on the end plate, and the connector is provided with a first limiting structure. The output pole piece is located between two adjacent connectors along the second direction. The two ends of the protective cover in the second direction are respectively provided with a third limiting structure that is clamped to the connector, that is, the two ends of the protective cover in the second direction are respectively clamped to the connectors on both sides of the output pole piece through the third limiting structure, thereby limiting the freedom of the protective cover in the second direction and the third direction, that is, limiting the protection cover from moving in the second direction and the third direction. In addition, there is also a matching limiting structure (i.e., concave-convex matching) of a limiting rib and a limiting groove between the protective cover and the connector, and both ends of the limiting rib in the first direction are in direct contact with the groove wall of the limiting groove, thereby limiting the freedom of the protective cover in the first direction, that is, limiting the protection cover from moving in the first direction. Therefore, based on the above-mentioned connection method between the protective cover and the connector, the connection structure is simple and can be assembled without additional auxiliary parts. The assembly is simple and can be efficiently assembled in a limited assembly space. The freedom of the protective cover in the first direction, the second direction and the third direction are restricted, so that the protective cover can be firmly connected to the end plate, so that the battery pack has good protection performance for the output electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the battery pack of an embodiment of the utility model;

[0025] Figure 2 It is an exploded schematic diagram of the end plate of an embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the protection seat and the protection cover of the embodiment of the utility model;

[0027] Figure 4It is a cross-sectional view of the protective cover of the embodiment of the utility model.

[0028] In the figure, X, first direction; Y, second direction; Z, third direction; 100, first limiting structure; 1001, limiting rib; 200, second limiting structure; 2001, limiting groove; 300, third limiting structure; 3001, buckle body; 10, battery pack; 1, output pole piece; 2, end plate; 201, connector; 2011, buckle hole; 21, plate body; 211, mounting groove; 212, card slot; 213, open mouth; 22, protection seat; 221, card convex part; 3, protection cover; 31, cover plate; 32, first connecting plate; 33, second connecting plate; 34, first protective plate; 35, second protective plate; 351, connection port; 36, protective baffle; 37, third protective plate. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which 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 only used for descriptive purposes, 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 of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the application examples, "parallel" means that the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. In addition, "perpendicular" means that the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distance, equal angle or equal area means that the tolerance range is -1% to 1%.

[0034] The utility model provides an electric device, which comprises a battery pack as described below, wherein the battery pack is used to store and provide electric energy.

[0035] like Figure 1-4 As shown, a preferred battery pack of the embodiment of the utility model has a first direction X, a second direction Y and a third direction Z which are perpendicular to each other, and the battery pack includes a battery pack 10, the battery pack 10 includes a plurality of single cells arranged along the first direction X, the single cells include electrode terminals, and the plurality of single cells are connected through the electrode terminals and connected to the output electrode sheet 1 described below, and current is output to the outside through the output electrode sheet 1.

[0036] The battery pack also includes an output pole piece 1, an end plate 2, a protective cover 3, a connector 201 and a first limiting structure 100. The battery pack 10 is connected to the end plates 2 at both ends in the first direction X. The end plates 2 are connected to the battery pack 10 along the first direction X. Two connectors 201 are arranged on the end plate 2. The connectors 201 are arranged at intervals along the second direction Y. The side of the connector 201 in the second direction Y is provided with a first limiting structure 100. One end of the output pole piece 1 is connected to the electrode terminal, and the other end is arranged on the end plate 2 along the third direction Z and is located between the two connectors 201 along the second direction Y. That is, the output pole piece 1 is arranged on the side of the end plate 2 facing the protective cover 3 along the third direction Z. In one embodiment, Figure 3 As shown in the figure, the first limiting structure 100 is provided on the side of the connector 201 close to the output pole piece 1 in the second direction Y. In other embodiments, the first limiting structure 100 can also be provided on the side of the connector 201 away from the output pole piece 1 in the second direction Y.

[0037] The protective cover 3 is respectively provided with a third limiting structure 300 that is clamped to the connecting body 201 at both ends of the second direction Y, and the protective cover 3 is provided with a second limiting structure 200 at both ends in the second direction Y. The first limiting structure 100 and the second limiting structure 200 cooperate with each other in a concave-convex manner to limit the position in the first direction X, and the second limiting structure 200 and the third limiting structure 300 are arranged at intervals along the first direction X; wherein, the first limiting structure 100 is a limiting rib 1001, and the second limiting structure 200 is a limiting groove 2001, the limiting rib 1001 extends along the third direction Z, and both ends of the limiting rib 1001 in the first direction X are in direct contact with the groove wall of the corresponding limiting groove 2001.

[0038] Specifically, the end plate 2 is provided with a connector 201, the connector 201 is provided with a first limiting structure 100, the output pole piece 1 is provided with connectors 201 on both sides in the second direction, and the protective cover 3 is provided with third limiting structures 300 respectively connected to the connector 201 at both ends in the second direction, and the two ends of the protective cover 3 in the second direction Y are respectively connected to the connectors 201 on both sides of the output pole piece 1 through the third limiting structures 300, thereby limiting the freedom of the protective cover 3 in the second direction Y and the third direction Z, that is, limiting the protective cover 3 from moving in the second direction and the third direction. In addition, there is also a matching limiting structure (convex-concave matching) of the limiting rib 1001 and the limiting groove 2001 between the protective cover 3 and the connector 201, and the two ends of the limiting rib 1001 in the first direction X are in direct contact with the groove wall of the limiting groove 2001, thereby limiting the freedom of the protective cover 3 in the first direction X, that is, limiting the protective cover 3 from moving in the first direction. Therefore, based on the above-mentioned connection method between the protective cover 3 and the connector 201, the connection structure is simple and can be assembled without additional auxiliary parts. The assembly is simple and can be efficiently assembled even in a limited assembly space. The freedom of the protective cover 3 in the first direction X, the second direction Y and the third direction Z are restricted, so that the protective cover 3 can be firmly connected to the end plate 2, so that the battery pack has good protection performance for the output electrode 1.

[0039] In other embodiments, the first limiting structure 100 is a limiting groove 2001, and the second limiting structure 200 is a limiting rib 1001, which can also limit the freedom of the protective cover 3 in the first direction X, and the present invention does not impose any limitation on this.

[0040] In this embodiment, if Figure 2 and Figure 3As shown, the connecting body 201 is a plate-like structure, which occupies a relatively small space, and a button hole 2011 is provided on the side of the connecting body 201 in the second direction Y, and the button hole 2011 penetrates the connecting body 201 along the second direction Y, which is convenient for processing; the third limiting structure 300 includes a button body 3001, and both ends of the protective cover 3 in the second direction Y are provided with a button body 3001, and the button body 3001 is snap-connected to the button hole 2011. Specifically, this snap-connection of the protective cover 3 and the connecting body 201 is achieved by snapping the button body 3001 and the button hole 2011, and its structure is simple and easy to install, and the two can be assembled without the use of auxiliary parts such as screws.

[0041] In addition, since the connector 201 is provided with a buckle hole 2011, its strength will be reduced to a certain extent. In this embodiment, the first limiting structure 100 is a limiting rib 1001, which improves the strength of the connector 201 to a certain extent. Based on this, the structural reliability of the connector 201 is relatively high.

[0042] like Figure 2 and Figure 4 As shown, the protective cover 3 includes a cover plate 31, a first connecting plate 32 and a second connecting plate 33. The cover plate 31 is located on the side of the output pole piece 1 away from the end plate 2. The first connecting plate 32 and the second connecting plate 33 are connected to the side of the cover plate 31 facing the end plate 2. The cover plate 31 is provided with a first connecting plate 32 and a second connecting plate 33 at both ends of the second direction Y (that is, along the second direction Y, the first connecting plate 32 and the second connecting plate 33 are respectively connected to the same end of the cover plate 31). The first connecting plate 32 and the second connecting plate 33 are arranged at intervals in the first direction X. The buckle body 3001 is located on the first connecting plate 32 At one end away from the cover body, the second limiting structure 200 is located on the second connecting plate 33, whereby the buckle body 3001 and the first connecting plate 32 constitute an elastic buckle structure, when the protective cover 3 is buckled on the connecting body 201, the buckle body 3001 will be subjected to force, at this time, the first connecting plate 32 will be offset in the second direction Y, and when the buckle body 3001 is buckled into the buckle hole 2011, the buckle body 3001 is no longer subjected to force, and the first connecting plate 32 elastically recovers to its initial state, and thereafter, the buckle body 3001 is buckled in the buckle hole 2011; based on this elastic buckle structure, the protective cover 3 has the characteristic of being easy to assemble.

[0043] like Figure 3As shown, the buckle body 3001 is located on the side of the first connecting plate 32 away from the cover plate 31, the limiting groove 2001 penetrates the second connecting plate 33 along the second direction Y, and the end of the limiting groove 2001 close to the end plate 2 is an open end, and the limiting rib 1001 is arranged on the side of the connector 201 close to the output pole piece 1 in the second direction Y; in the process of clamping the protective cover 3 with the connector 201, along the third direction Z, the limiting rib 1001 is inserted into the limiting groove 2001 from the open end of the limiting groove 2001, and after the protective cover 3 is clamped on the connector 201, the protective cover 3 is located between the two connectors 201. At this time, the protective cover 3 occupies less space, and the structure after the end plate 2 and the protective cover 3 are matched is more compact.

[0044] In other embodiments, the buckle body 3001 is located on the side of the first connecting plate 32 facing the output pole piece 1, so that the protective cover 3 can also be snapped onto the connecting body 201, and the present invention does not limit this.

[0045] In this embodiment, if Figure 2 and Figure 4 As shown, the protective cover 3 also includes a first protective plate 34 and a second protective plate 35, which are respectively arranged at the two ends of the cover plate 31 in the first direction X; along the third direction Z, the first protective plate 34 and the second protective plate 35 are both located on the side of the cover plate 31 facing the end plate 2; specifically, the two connectors 201 define an installation space, and the output pole piece 1 is arranged in the installation space. After the protective cover 3 is snapped with the connector 201, the first protective plate 34 and the second protective plate 35 are respectively located at the two ends of the installation space in the first direction X. The first protective plate 34 and the second protective plate 35 play a shielding role, and it is not easy for the operator to touch the output pole piece 1 when using the battery pack. Therefore, the battery pack has the characteristics of relatively high safety.

[0046] The second protective plate 35 is provided with a connection port 351 penetrating along the first direction X, and the end of the connection port 351 away from the cover plate 31 is an open end, and the function of the connection port 351 is to allow the line of the electrical device to pass through so that the line can be connected to the output pole piece 1; the protective cover 3 also includes a protective baffle 36, which is arranged on the side of the second protective plate 35 facing away from the first protective plate 34, and the protective baffle 36 is arranged around the outer side of the connection port 351, wherein the protective baffle 36 plays a shielding role, which can prevent the operator from touching the output pole piece 1, and the safety of the battery pack is better.

[0047] The protective cover 3 also includes a third protective plate 37, which is arranged on the side of the first protective plate 34 away from the cover plate 31. The thickness direction of the third protective plate 37 is parallel to the third direction Z, and the third protective plate 37 extends toward the battery pack 10. The arrangement of the third protective plate 37 and the protective baffle 36 enables the protective cover 3 to have a longer length dimension in the first direction X, which can increase the creepage distance and increase the electrical safety characteristics.

[0048] like Figure 3 As shown, the end plate 2 includes a plate body 21 and a protective seat 22. The protective seat 22 is detachably connected to the side of the plate body 21 facing the output pole piece 1 in the third direction Z. The protective seat 22 is provided with a connector 201, and the output pole piece 1 is arranged on the protective seat 22. For the end plate 2 of this structure, the plate body 21 can be made of extruded aluminum or die-cast aluminum, while the protective seat 22 and the protective cover 3 are made of insulating material. Therefore, the plate body 21 has a higher strength, which can improve the safety performance of the battery pack.

[0049] Furthermore, a mounting groove 211 is provided on the side of the board body 21 facing the protective seat 22, a clamping groove 212 is provided on the groove wall surface of the mounting groove 211 in the second direction Y, an opening 213 is provided on the side of the board body 21 facing the output pole piece 1, and the opening 213 is connected to the mounting groove 211; the protective seat 22 has a clamping protrusion 221, and along the third direction Z, the protective seat 22 is inserted into the mounting groove 211 through the clamping protrusion 221, and the clamping protrusion 221 is tightly fitted with the clamping groove 212, and the protective seat 22 is connected to the board body 21 by clamping, and the two are easy to assemble and have relatively high connection stability.

[0050] In other embodiments, the end plate 2 is made of insulating material, and the plate body 21 and the protection seat 22 are integrally provided, and the present invention does not impose any limitation on this.

[0051] 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.

[0052] It can be understood that the electrical device of the embodiment of the present application includes the technical features and technical effects of the aforementioned battery pack, which will not be repeated here.

[0053] Of course, the electrical devices referred to in this application may include but are not limited to backup power supplies, electrodes, electric vehicles, electric bicycles, electric motorcycles, large batteries, etc.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A battery pack having a first direction (X), a second direction (Y) and a third direction (Z) intersecting each other, characterized in that: It comprises a battery pack (10), an output pole piece (1), an end plate (2), a protective cover (3), a connector (201) and a first limiting structure (100): The battery pack (10) comprises a plurality of single cells arranged along the first direction (X), and the single cells comprise electrode terminals; The end plate (2) is connected to the battery pack (10) along the first direction (X), at least two connectors (201) are provided on the end plate (2), the connectors (201) are arranged at intervals along the second direction (Y), and the first limiting structure (100) is provided on the side surface of the connector (201) in the second direction (Y); One end of the output electrode piece (1) is connected to the electrode terminal, and the other end is arranged on the end plate (2) along the third direction (Z) and is located between two adjacent connectors (201) along the second direction (Y); The protective cover (3) is provided with a third limiting structure (300) at both ends in the second direction (Y) and is clamped to the connecting body (201); the protective cover (3) is provided with a second limiting structure (200) at both ends in the second direction (Y), the first limiting structure (100) cooperates with the second limiting structure (200) for limiting, and the second limiting structure (200) and the third limiting structure (300) are arranged at intervals along the first direction (X); One of the first limiting structure (100) and the second limiting structure (200) is a limiting rib and the other is a limiting groove, the limiting rib extends along the third direction (Z), and both ends of the limiting rib in the first direction (X) are in direct contact with the corresponding groove wall of the limiting groove.

2. The battery pack according to claim 1, characterized in that: The connector (201) is provided with a button hole (2011) on the side surface in the second direction (Y); The third limiting structure (300) comprises a buckle body (3001), and the buckle bodies (3001) are provided at both ends of the protective cover (3) in the second direction (Y), and the buckle bodies (3001) are snap-connected to the buckle holes (2011).

3. The battery pack according to claim 2, characterized in that: The protective cover (3) comprises a cover plate (31), a first connecting plate (32) and a second connecting plate (33); the cover plate (31) is located on a side of the output pole piece (1) away from the end plate (2); the first connecting plate (32) and the second connecting plate (33) are connected to the side of the cover plate (31) facing the end plate (2); the cover plate (31) is provided with the first connecting plate (32) and the second connecting plate (33) at both ends in the second direction (Y); the first connecting plate (32) and the second connecting plate (33) are arranged at intervals in the first direction (X); the buckle body (3001) is located on the first connecting plate (32); and the second limiting structure (200) is located on the second connecting plate (33).

4. The battery pack according to claim 3, characterized in that: The buckle body (3001) is connected to the side of the first connecting plate (32) facing away from the cover plate (31), and the second limiting structure (200) is the limiting groove, which passes through the second connecting plate (33) along the second direction (Y), and the end of the limiting groove close to the end plate (2) is an open end.

5. The battery pack according to claim 3, characterized in that: The protective cover (3) further comprises a first protective plate (34) and a second protective plate (35), wherein the first protective plate (34) and the second protective plate (35) are respectively arranged at two ends of the cover plate (31) in the first direction (X); along the third direction (Z), the first protective plate (34) and the second protective plate (35) are both connected to the side of the cover plate (31) facing the end plate (2).

6. The battery pack according to claim 5, characterized in that: The second protective plate (35) is provided with a connection port (351) penetrating along the first direction (X), and an end of the connection port (351) away from the cover plate (31) is an open end; The protective cover (3) further comprises a protective baffle (36), wherein the protective baffle (36) is connected to the side of the second protective plate (35) facing away from the first protective plate (34), and the protective baffle (36) is arranged around the outer side of the connection port (351).

7. The battery pack according to claim 5, characterized in that: The protective cover (3) further comprises a third protective plate (37), wherein the third protective plate (37) is connected to the side of the first protective plate (34) away from the cover plate (31).

8. The battery pack according to claim 2, characterized in that: The first limiting structure (100) is the limiting rib body, the limiting rib body is arranged on the side of the connecting body (201) close to the output pole piece (1) in the second direction (Y), and the buckle hole (2011) passes through the connecting body (201) along the second direction (Y).

9. The battery pack according to claim 1, characterized in that: The end plate (2) comprises a plate body (21) and a protection seat (22); the protection seat (22) is detachably connected to a side of the plate body (21) in the third direction (Z) facing the output pole piece (1); the protection seat (22) is provided with the connector (201); and the output pole piece (1) is arranged on the protection seat (22).

10. An electrical device, characterized in that: Comprising a battery pack as described in any one of claims 1-9.

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