Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, the battery pack comprises batteries, a connecting plate and a busbar; a plurality of batteries are arranged in the first direction to form a battery pack; the connecting plate comprises an insulating main body and a plurality of reinforcing strips, the insulating main body wraps all the reinforcing strips, and in the second direction, the insulating main body is arranged on one side of the battery pack and is connected with the battery pack; the number of the busbars is multiple, in the second direction, the multiple busbars are connected to the face, back on to the battery pack, of the insulating body, in the first direction, every two adjacent batteries are connected through one busbar, and due to the fact that the insulating body is wrapped with the reinforcing strips, the strength of the connecting plate is relatively high, and therefore the connecting plate is not prone to deformation. The battery pack can ensure that the whole battery pack has relatively high structural stability without arranging a pressing strip, and the battery pack is relatively simple to assemble.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and electrical equipment. Background Technology

[0002] In a battery pack, multiple batteries are arranged in one direction to form a battery group. The battery group is connected by a blister pack and a busbar. The blister pack provides structural support for the busbar and isolates the busbar from the battery group. The blister pack enhances the overall structural stability of the battery group to a certain extent. However, the blister pack is relatively thin and its strength is relatively poor. Therefore, the battery group is usually also connected by a pressure strip, which is connected to each battery in the battery group. The pressure strip, together with the blister pack, further improves the overall structural stability of the battery group. This type of battery pack requires the pressure strip and blister pack to be assembled onto the battery group during assembly, which is a relatively complex assembly operation. Utility Model Content

[0003] The primary objective of this invention is to propose a battery pack that is relatively simple to assemble and has a relatively strong structural stability of its internal battery pack.

[0004] To achieve the above objectives, this utility model provides a battery pack having intersecting first and second directions, including a battery, a connecting plate, and a busbar;

[0005] The number of batteries is multiple, and the multiple batteries are arranged along the first direction to form a battery pack;

[0006] The connecting plate includes an insulating body and reinforcing strips. There are multiple reinforcing strips. The insulating body covers all the reinforcing strips. In the second direction, the insulating body is located on one side of the battery pack and is connected to the battery pack. The insulating body has multiple through holes that extend along the second direction.

[0007] The number of busbars is multiple. In the second direction, multiple busbars are connected to the side of the insulating body facing away from the battery pack. Each busbar has a first connection end and a second connection end that are interconnected.

[0008] In the first direction, two adjacent batteries are connected through a busbar, and in the busbar, the first connection end is connected to one of the batteries at one of the connection through holes, and the second connection end is connected to the other battery at another of the connection through holes.

[0009] In a specific embodiment of this utility model, the length direction of the reinforcing strip is oblique to the first direction, or the length direction of the reinforcing strip is the same as the first direction.

[0010] In a specific embodiment of this utility model, the insulating body has a plurality of mounting grooves on the side facing away from the battery pack, and each mounting groove has the connecting through hole;

[0011] The connecting plate also includes a plurality of connecting posts, and at least one of the connecting posts is vertically provided on the bottom surface of each mounting groove;

[0012] The busbar is provided with a mounting hole that extends through the second direction;

[0013] Each of the mounting grooves is fitted with a busbar, and in a single mounting groove, the connecting post passes through the mounting hole.

[0014] In a specific embodiment of this utility model, the battery pack further includes a first adhesive layer, and each of the mounting grooves is provided with the first adhesive layer, and the busbar is fixed in the mounting groove by the first adhesive layer.

[0015] In a specific embodiment of this utility model, the battery pack further includes a second adhesive layer. In the second direction, the second adhesive layer is disposed between the battery pack and the insulating body, and the second adhesive layer connects the insulating body and the battery pack.

[0016] In a specific embodiment of this utility model, the battery pack further includes a housing, a cover, a first beam, and a second beam;

[0017] The box and the cover are connected along the second direction, and a receiving cavity is formed between the box and the cover;

[0018] Both the first beam and the second beam are connected to the box body, and the first beam and the second beam are arranged in the accommodating cavity along the first direction;

[0019] The battery pack is located within the accommodating cavity. In the first direction, the battery pack is disposed between the first beam and the second beam, with one end of the battery pack connected to the first beam and the other end connected to the second beam.

[0020] In a specific embodiment of this utility model, in the first direction, one end of the connecting plate is connected to the first beam and the other end is connected to the second beam.

[0021] In a specific embodiment of this utility model, the battery pack further includes a first connector and a second connector. In the first direction, one end of the connecting plate is connected to the first beam through the first connector, and the other end is connected to the second beam through the second connector.

[0022] In a specific embodiment of this utility model, the battery pack further includes a protective cover plate disposed within the accommodating cavity, and in the second direction, the protective cover plate is located on the side of the busbar away from the battery pack, and the protective cover plate is connected to the insulating body and covers the busbar.

[0023] This utility model also provides an electrical device, including the battery pack described above.

[0024] The present invention discloses a battery pack and electrical device, which, compared with the prior art, have the following advantages:

[0025] The battery pack of this utility model includes a connecting plate comprising an insulating body and reinforcing strips. The insulating body covers all the reinforcing strips and provides structural support for the busbar while isolating the busbar from the battery pack. The connecting plate is connected to the battery pack and enhances the overall structural stability of the battery pack. Moreover, since the insulating body is covered with reinforcing strips, the strength of the connecting plate is relatively high. Therefore, the battery pack can maintain a relatively high structural stability without the need for pressure strips, and the battery pack assembly is relatively simple. Attached Figure Description

[0026] Figure 1 This is a perspective view of the battery pack according to an embodiment of the present invention;

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

[0028] Figure 3 This is an embodiment of the present utility model. Figure 2 Enlarged diagram of A in the middle;

[0029] Figure 4 This is a schematic diagram of the connection plate and the busbar in an embodiment of this utility model;

[0030] Figure 5 This is an embodiment of the present utility model. Figure 4 Enlarged diagram of B in the diagram;

[0031] Figure 6 This is a perspective view of the battery pack without the cover according to an embodiment of the present invention.

[0032] In the diagram, X represents the first direction; Z represents the second direction; 1 is the battery; 2 is the connecting plate; 21 is the insulating body; 2101 is the mounting groove; 2102 is the connecting through hole; 22 is the reinforcing strip; 23 is the connecting post; 3 is the busbar; 31 is the first connecting end; 32 is the second connecting end; 301 is the mounting hole; 4 is the housing; 5 is the cover; 6 is the first beam; 7 is the second beam; 8 is the protective cover; 10 is the first adhesive layer; 20 is the second adhesive layer; 30 is the first connector; 40 is the second connector; 100 is the battery pack; and 200 is the accommodating cavity. Detailed Implementation

[0033] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0034] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the embodiments of the application, "parallel" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is -1° to 1°. "Perpendicular" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is 89° to 91°. Equal distances, equal angles, or equal areas refer to a state in which the tolerance range is -1% to 1%.

[0038] This application proposes an electrical device that includes a battery pack as described below. The battery pack is used to store and output electrical energy and to provide power to the electrical device, which includes, but is not limited to, electric vehicles, drones, and power banks. Since the electrical device uses the battery pack described below, it also has the advantages of the battery pack described below, which will not be elaborated further in this application.

[0039] like Figures 1 to 6 As shown, a preferred embodiment of the present invention provides a battery pack having a first direction X and a second direction Z perpendicular to each other, including a battery 1, a connecting plate 2, and a busbar 3; the number of batteries 1 is multiple, and the multiple batteries 1 are arranged along the first direction X to form a battery pack 100; the connecting plate 2 includes an insulating body 21 and reinforcing strips 22, the number of reinforcing strips 22 is multiple, the insulating body 21 covers all the reinforcing strips 22, and in the second direction Z, the insulating body 21 is disposed on one side of the battery pack 100 and is connected to the battery pack 100, the insulating body 21 having a first direction X and a second direction Z perpendicular to each other, and the connecting plate 2 has a first direction X and a second direction Z perpendicular to each other. Multiple connecting through holes 2102 extending in the second direction Z; multiple busbars 3 are connected to the side of the insulating body 21 facing away from the battery pack 100 in the second direction Z. Each busbar 3 has a first connecting end 31 and a second connecting end 32 that are connected to each other. In the first direction X, two adjacent batteries 1 are connected through a busbar 3. In the busbar 3, the first connecting end 31 is connected to one of the batteries 1 at a connecting through hole 2102, and the second connecting end 32 is connected to another battery 1 at another connecting through hole 2102.

[0040] Specifically, in this embodiment, the battery pack connecting plate 2 includes an insulating body 21 and reinforcing strips 22. The insulating body 21 covers all the reinforcing strips 22. The insulating body 21 provides structural support for the busbar 3 and isolates the busbar 3 from the battery pack 100. The connecting plate 2 is connected to the battery pack 100. The connecting plate 2 can enhance the overall structural stability of the battery pack 100. Moreover, since the insulating body 21 is covered with reinforcing strips 22, the strength of the connecting plate 2 is relatively high. Therefore, the battery pack can ensure that the battery pack 100 has relatively high structural stability without the need to set pressure strips. The battery pack assembly is relatively simple.

[0041] For example, the insulating body 21 is made of polyurethane, while the reinforcing strip 22 is made of glass fiber with a glass fiber content of 80%. Since polyurethane has an insulating effect and glass fiber has high strength, the connecting plate 2 of this structure not only has good insulation performance but also relatively high strength.

[0042] It should be noted that battery 1 has two terminals. In battery pack 100, the terminals of multiple batteries 1 are arranged in two rows along the first direction X. In a single row of terminals, a busbar 3 connects the terminals of two adjacent batteries 1. The terminals of battery 1 pass through the corresponding connecting through holes 2102, and the terminals are welded to the busbar 3. At this time, there are also two rows of busbars 3. The two rows of busbars 3 connect multiple batteries 1 in series in battery pack 100. In this application, in a single battery pack 100, one row of busbars 3 is correspondingly disposed on a connecting plate 2, that is, a single battery pack 100 is correspondingly disposed on two connecting plates 2. Exemplarily, the battery pack of this application has multiple battery packs 100 arranged in sequence, and in two adjacent battery packs 100, the two adjacent connecting plates 2 are connected into an integral structure. At this time, the structure of the connecting plate 2 is as follows. Figure 4 As shown.

[0043] Furthermore, such as Figure 4 and Figure 5 As shown, the length direction of the reinforcing strip 22 is the same as the first direction X. Therefore, the tensile strength of the connecting plate 2 along the first direction X is relatively large, and the connecting plate 2 can better resist the expansion force of the battery 1 along the first direction X. For example, as shown... Figure 2 As shown, multiple batteries 1 are arranged along the first direction X. Since the expansion force of the battery 1 along its large surface direction is relatively large, the length direction of the reinforcing strip 22 is the same as the first direction X, which can better resist the expansion force of the battery 1, prevent the battery 1 casing from expanding and cracking, and ensure the safety of the battery 1 when it is working.

[0044] In other embodiments, the length direction of the reinforcing strip 22 is oblique to the first direction X. The connecting plate 2 with this structure also has a relatively large tensile strength along the first direction X, and can also resist the expansion force of the battery 1 along the first direction X.

[0045] In this embodiment, as Figure 4 As shown, the insulating body 21 has multiple mounting grooves 2101 on the side facing away from the battery pack 100, and each mounting groove 2101 has a connecting through hole 2102; the connecting plate 2 also includes a connecting post 23, and at least one connecting post 23 is vertically provided on the bottom surface of each mounting groove 2101; the busbar 3 has a mounting hole 301 that extends through along the second direction Z; wherein, each mounting groove 2101 is fitted with a busbar 3, and in a single mounting groove 2101, the connecting post 23 passes through the mounting hole 301. Specifically, the function of the connecting post 23 is to limit the position of the busbar 3. The cooperation between the connecting post 23 and the mounting hole 301 enables the busbar 3 to be accurately assembled into place, ensuring the structural stability of the connection between the busbar 3 and the battery 1.

[0046] Furthermore, such as Figure 4 As shown, the battery pack also includes a first adhesive layer 10. Each mounting groove 2101 is provided with a first adhesive layer 10. The busbar 3 is fixed in the mounting groove 2101 by the first adhesive layer 10. For example, the first adhesive layer 10 is provided on the bottom surface of the mounting groove 2101 and connects the busbar 3. Specifically, the connection between the busbar 3 and the connecting plate 2 by adhesive bonding can firmly fix the busbar 3 on the connecting plate 2, reduce the loosening and displacement of the busbar 3 caused by vibration, collision, etc., ensure the stability of the electrical connection, and reduce the risk of failure.

[0047] In this embodiment, as Figure 2 and Figure 3 As shown, the battery pack also includes a second adhesive layer 20. In the second direction Z, the second adhesive layer 20 is disposed between the battery pack 100 and the insulating body 21. The second adhesive layer 20 connects the insulating body 21 and the battery pack 100. Similarly, by using adhesive to connect the insulating body 21 and the battery pack 100, the connection stability between the connecting plate 2 and the battery pack 100 can be improved, thereby improving the overall structural stability of the battery pack 100.

[0048] Furthermore, such as Figure 1 and Figure 2As shown, the battery pack also includes a housing 4, a cover 5, a first beam 6, and a second beam 7; the housing 4 and the cover 5 are connected along the second direction Z, and a cavity 200 is formed between the housing 4 and the cover 5; the first beam 6 and the second beam 7 are both connected to the housing 4, and the first beam 6 and the second beam 7 are arranged in the cavity 200 along the first direction X; the battery pack 100 is located in the cavity 200, and in the first direction X, the battery pack 100 is disposed between the first beam 6 and the second beam 7, and one end of the battery pack 100 is connected to the first beam 6. One end is connected to the second beam 7. Specifically, the first beam 6 and the second beam 7 restrict the position of the battery pack 100 in the first direction X, which helps to maintain the regular arrangement of the batteries 1 inside the battery pack and can prevent displacement along the first direction X due to vibration, bumps, etc., ensuring that the battery pack 100 is always in the correct installation position. In addition, it can also prevent the expansion force of the battery 1 along the first direction X from acting directly on the outer shell of the box 4, preventing the outer shell of the box 4 from being deformed or damaged due to excessive external force.

[0049] Furthermore, in the first direction X, one end of the insulating body 21 is connected to the first beam 6, and the other end is connected to the second beam 7. The insulating body 21, the first beam 6, and the second beam 7 work together to further improve the structural stability of the battery pack 100. In addition, the expansion force of the battery 1 acting on the connecting plate 2 can be transmitted to the first beam 6 and the second beam 7, thereby better coping with the expansion force of the battery 1 in the first direction X.

[0050] As a specific implementation of this embodiment, such as Figure 2 and Figure 6 As shown, the battery pack also includes a first connector 30 and a second connector 40. In the first direction X, one end of the connecting plate 2 is connected to the first beam 6 via the first connector 30, and the other end is connected to the second beam 7 via the second connector 40. For example, both the first connector 30 and the second connector 40 are bolts. The first beam 6 and the second beam 7 have threaded holes on the side facing the cover 5. Both ends of the connecting plate 2 in the first direction X have through holes. The first connector 30 passes through the through hole at one end of the connecting plate 2 and connects to the threaded hole on the first beam 6, connecting the connecting plate 2 and the first beam 6 by a threaded connection. The second connector 40 passes through the through hole at the other end of the connecting plate 2 and connects to the threaded hole on the second beam 7, connecting the connecting plate 2 and the second beam 7 by a threaded connection. This method achieves the connection between the connecting plate 2 and the first beam 6 and the second beam 7, which has a simple structure, is convenient for assembly, and has a reliable connection. In addition, the first connector 30 and the second connector 40 can also be pins or other connectors known to those skilled in the art, and this application does not limit them.

[0051] In this application, as Figure 2 and Figure 3 As shown, the battery pack also includes a protective cover 8, which is located within the accommodating cavity 200 and in the second direction Z. The protective cover 8 is located on the side of the busbar 3 away from the battery pack 100. The protective cover 8 is connected to the insulating body 21 and covers the busbar 3. The protective cover 8 and the insulating body 21 work together to isolate the busbar 3 from the external environment, thus protecting the busbar 3. When subjected to external impact, the protective cover 8 can prevent the external force from acting directly on the busbar 3, reducing the pressure on the busbar 3. Furthermore, the protective cover 8 is made of insulating material. In this case, the protective cover 8 can ensure that the busbar 3 remains insulated from surrounding potentially conductive components, maintaining the normal electrical circuit of the battery pack.

[0052] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery pack having a first direction (X) and a second direction (Z) intersecting, characterized by, The battery pack comprises a battery (1), a connecting plate (2) and a busbar (3); The number of the battery (1) is multiple, and the multiple batteries (1) are arranged along the first direction (X) to form a battery group (100); The connecting plate (2) comprises an insulating body (21) and a reinforcing strip (22), the number of the reinforcing strip (22) is multiple, the insulating body (21) covers all the reinforcing strips (22), the insulating body (21) is arranged on one side of the battery group (100) in the second direction (Z), and the insulating body (21) is connected with the battery group (100), the insulating body (21) is provided with multiple connecting through holes (2102) penetrating in the second direction (Z); The number of the busbar (3) is multiple, and the multiple busbars (3) are connected to the side of the insulating body (21) away from the battery group (100) in the second direction (Z), the busbar (3) has a first connecting end (31) and a second connecting end (32) connected with each other; In the first direction (X), two adjacent batteries (1) are connected by one busbar (3), and in the busbar (3), the first connecting end (31) is connected with one of the batteries (1) at one connecting through hole (2102), and the second connecting end (32) is connected with another battery (1) at another connecting through hole (2102).

2. The battery pack of claim 1, wherein, The length direction of the reinforcing strip (22) is oblique to the first direction (X), or the length direction of the reinforcing strip (22) is the same as the first direction (X).

3. The battery pack of claim 1, wherein, The side of the insulating body (21) away from the battery group (100) is provided with multiple mounting grooves (2101), and each mounting groove (2101) is provided with a connecting through hole (2102); The connecting plate (2) further comprises multiple connecting columns (23), and at least one connecting column (23) is vertically arranged on the bottom surface of each mounting groove (2101); The busbar (3) is provided with a mounting hole (301) penetrating in the second direction (Z); Each mounting groove (2101) is embedded with one busbar (3), and the connecting column (23) penetrates the mounting hole (301).

4. The battery pack of claim 3, wherein, The battery pack further comprises multiple first adhesive layers (10), each mounting groove (2101) is provided with a first adhesive layer (10), and the busbar (3) is fixed in the mounting groove (2101) through the first adhesive layer (10).

5. The battery pack of claim 1, wherein, The battery pack further comprises a second adhesive layer (20), which is arranged between the battery group (100) and the insulating body (21) in the second direction (Z), and connects the insulating body (21) and the battery group (100).

6. The battery pack of claim 1, wherein, The battery pack further comprises a box body (4), a cover body (5), a first beam body (6) and a second beam body (7); The box body (4) is connected with the cover body (5) along the second direction (Z), and a containing cavity (200) is formed between the box body (4) and the cover body (5); The first beam body (6) and the second beam body (7) are both connected with the box body (4), and the first beam body (6) and the second beam body (7) are arranged in the containing cavity (200) along the first direction (X); The battery pack (100) is located in the containing cavity (200), and in the first direction (X), the battery pack (100) is arranged between the first beam body (6) and the second beam body (7), and one end of the battery pack (100) is connected with the first beam body (6) and the other end is connected with the second beam body (7).

7. The battery pack of claim 6, wherein, In the first direction (X), one end of the connecting plate (2) is connected with the first beam body (6) and the other end is connected with the second beam body (7).

8. The battery pack of claim 7, wherein, The battery pack further comprises a first connecting piece (30) and a second connecting piece (40), and in the first direction (X), one end of the connecting plate (2) is connected with the first beam body (6) through the first connecting piece (30) and the other end is connected with the second beam body (7) through the second connecting piece (40).

9. The battery pack of claim 6, wherein, The battery pack further comprises a protective cover plate (8), the protective cover plate (8) is arranged in the containing cavity (200), and in the second direction (Z), the protective cover plate (8) is located on the side of the busbar (3) away from the battery pack (100), the protective cover plate (8) is connected with the insulating main body (21) and covers the busbar (3).

10. An electric device, characterized by The battery pack comprises the battery pack according to any one of claims 1-9. The battery pack comprises the battery pack according to any one of claims 1-9.

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