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 a box body, a cover body, a battery, a busbar and a first insulating coating; the box body is provided with a containing groove. The cover body is connected with the box body and covers the notch of the accommodating groove; the batteries are arranged in the accommodating grooves, the number of the batteries is multiple, and every two adjacent batteries are electrically connected through a busbar; wherein the busbar is positioned on one side, close to the cover body, of the battery, the busbar is provided with a sinking groove, the sinking groove is positioned on one surface, facing the cover body, of the busbar, the groove bottom surface of the sinking groove is a first area, the surface, facing the cover body, of the busbar is a second area, the first area is a welding area for connecting the busbar and the battery, and the second area is coated with a first insulating coating; the insulation between the busbar and the cover body is realized through the first insulating coating, and the first insulating coating is firm in attachment, high in reliability and small in occupied space, so that the battery pack has the characteristic of compact structure.

Description

Technical Field

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

[0002] The battery pack includes a box body, a cover body, batteries and a bus bar. The box body has a receiving slot. The cover body is connected to the box body and covers the slot of the receiving slot. The battery is arranged in the receiving slot. There are multiple batteries. The bus bar connects two adjacent batteries, and the bus bar is located on the side of the battery close to the cover body. The function of the bus bar is to realize electrical connection between batteries and ensure uniform current flow. Therefore, insulation treatment is required between the bus bar and the cover body to avoid safety accidents. In the related art, insulation between the two is achieved by adding an insulating part between the bus bar and the cover body. The defect of this method is that the insulating part has a certain volume, occupies a relatively large space in the battery pack, and is not conducive to the compact design of the battery pack. Utility Model Content

[0003] The primary purpose of the present invention is to provide a battery pack with a compact structure.

[0004] In order to achieve the above-mentioned object, the utility model provides a battery pack, comprising a box body, a cover body, batteries, a bus bar and a first insulating coating;

[0005] The box body has a receiving groove;

[0006] The cover is connected to the box body and covers the notch of the receiving slot;

[0007] The battery is arranged in the receiving slot, the number of the battery is multiple, and two adjacent batteries are electrically connected via the busbar;

[0008] The busbar is located on the side of the battery close to the cover body, and the busbar has a sink groove, which is located on the side of the busbar facing the cover body. The bottom surface of the sink groove is the first area, and the side of the busbar facing the cover body is the second area. The first area is the welding area where the busbar is connected to the battery, and the second area is coated with the first insulating coating.

[0009] In a specific embodiment of the present invention, the busbar includes a first connecting portion, a second connecting portion, and a third connecting portion. The first connecting portion, the second connecting portion, and the third connecting portion are all located on one side facing the cover body, and the first connecting portion and the second connecting portion are both provided with the sinking groove. The first connecting portion and the second connecting portion are respectively connected to two adjacent batteries, and the third connecting portion connects the first connecting portion and the second connecting portion.

[0010] The third connecting part is recessed on one side facing the cover, so that the other side of the third connecting part is protruded relative to the first connecting part and the second connecting part towards the side where the battery is located,

[0011] Or,

[0012] The third connecting part is recessed on the side facing away from the cover, so that the other side of the third connecting part is protruded relative to the first connecting part and the second connecting part towards the side where the cover is located.

[0013] In a specific embodiment of the utility model, the third connecting part has a weight-reducing hole, and the weight-reducing hole penetrates the third connecting part.

[0014] In a specific embodiment of the utility model, the utility model further comprises an electrical isolation plate, the electrical isolation plate is arranged between the battery and the cover, the electrical isolation plate has a mounting groove and a first avoiding hole, the mounting groove is located on the side of the electrical isolation plate facing the cover, and the first avoiding hole penetrates from the groove bottom surface of the mounting groove to the side of the electrical isolation plate facing the battery.

[0015] The number of the mounting grooves is multiple, each mounting groove is provided with the first avoiding hole, one busbar is arranged in one mounting groove, and the groove bottom surface of the sink groove is opposite to the first avoiding hole.

[0016] In a specific embodiment of the utility model, the busbar has a first avoiding groove and a first connecting hole, the first avoiding groove is located on the side of the busbar facing the cover, the first avoiding groove is arranged in a spaced mode with the sink groove, and the first connecting hole penetrates from the groove bottom surface of the first avoiding groove to the side of the busbar facing the battery.

[0017] The electrical isolation plate has a fourth connecting part, the fourth connecting part is located on the groove bottom surface of the mounting groove, and the fourth connecting part penetrates the first connecting hole.

[0018] In a specific embodiment of the utility model, the first avoiding groove has an opening, and the opening faces the groove side surface of the mounting groove.

[0019] The groove edge of the first avoiding groove, the groove edge of the sink groove and the outer edge of the side of the busbar facing the cover enclose the second area.

[0020] In a specific embodiment of the utility model, the electrical isolation plate has a protruding part, the protruding part is located on the side of the electrical isolation plate facing the battery, the protruding part is opposite to the mounting groove, and the avoiding hole penetrates from the groove bottom surface of the mounting groove to the side of the protruding part facing the battery.

[0021] The circumferential surface of the protruding part is provided with a second avoiding hole, which communicates the mounting groove and the first avoiding hole;

[0022] The battery pack further comprises an information acquisition component, which is arranged between the electrical isolation plate and the battery, is inserted into the second avoiding hole, and is connected to the side of the busbar facing the battery.

[0023] In a specific embodiment of the utility model, a second insulating coating is further included, which is coated on the side of the busbar facing the side surface of the mounting groove, and the second insulating coating is directly opposite the second avoiding hole.

[0024] In a specific embodiment of the utility model, a connecting piece is further included, which is arranged between the electrical isolation plate and the battery, and is connected to the electrical isolation plate, wherein the connecting piece is arranged between the adjacent first avoiding holes, and at least partially extends to the side of the first avoiding hole close to the battery.

[0025] In a specific embodiment of the utility model, the electrical isolation plate is provided with a second avoiding groove and a second connecting hole, the second avoiding groove is arranged on the side of the electrical isolation plate facing the cover, and the second connecting hole penetrates from the groove bottom surface of the second avoiding groove to the side of the electrical isolation plate facing the battery.

[0026] The connecting piece is provided with a fifth connecting part, which is arranged on the side of the connecting piece away from the battery, and penetrates the second connecting hole.

[0027] The utility model further provides a kind of electric equipment, including the battery pack as described above.

[0028] Compared with prior art, the battery pack and the electric equipment provided by the embodiments of the utility model have the beneficial effects that:

[0029] The battery pack of the utility model discloses, the busbar is formed with first area and second area to one side of cover body, first area is the welding area of busbar and battery connection, busbar is welded at battery at first area, can guarantee that busbar and battery are stably connected, and second area is coated with first insulating coating, realize the insulation between busbar and cover body through first insulating coating, first insulating coating is attached firmly, and reliability is high, and the space is less, make battery pack have the compact structure characteristics, in addition, the setting of first insulating coating, one side can play the role of safety protection in the process of battery pack assembly, prevent the danger situation of electric shock of operator's misoperation, the other side can also reduce the misoperation of external foreign matters such as welding slag / scrap or operating tool and so on to busbar and lead to short circuit, and the safety is higher. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the perspective drawing of the battery pack of the utility model embodiment;

[0031] Figure 2 It is the top view of the battery pack of the utility model embodiment of removing cover body;

[0032] Figure 3 It is the perspective drawing of the battery, busbar, electrical isolation board cooperation of the utility model embodiment;

[0033] Figure 4 It is the utility model embodiment Figure 3 The enlarged schematic view of A in;

[0034] Figure 5 It is the utility model embodiment busbar, electrical isolation board, information acquisition component cooperation's bottom structure schematic view;

[0035] Figure 6 It is the utility model embodiment Figure 5 The enlarged schematic view of B in;

[0036] Figure 7 It is the perspective drawing of the busbar of the utility model embodiment;

[0037] Figure 8 It is the structure schematic view of the busbar, first insulating coating and second insulating coating cooperation of the utility model embodiment;

[0038] Figure 9 It is another structure schematic view of the busbar, first insulating coating and second insulating coating cooperation of the utility model embodiment;

[0039] Figure 10 It is the perspective drawing of the connecting piece of the utility model embodiment.

[0040] In the figure, 1, box body; 101, accommodating groove; 2, cover body; 3, battery; 4, bus; 41, first connecting part; 42, second connecting part; 43, third connecting part; 4301, weight-reducing hole; 401, sinking groove; 402, first area; 403, second area; 404, first avoidance groove; 4041, open mouth; 405, first connecting hole; 5, first insulating coating; 6, electrical isolation plate; 601, mounting groove; 602, first avoidance hole; 603, second avoidance hole; 604, second avoidance groove; 605, second connecting hole; 61, fourth connecting part; 62, protrusion; 7, information collection component; 8, second insulating coating; 9, connector; 91, fifth connecting part. DETAILED DESCRIPTION

[0041] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0042] 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0044] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being 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 the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the examples, "parallel" refers to the state where the angle formed between two lines, between a line and a plane, or between two planes is between -1° and 1°. Furthermore, "perpendicular" refers to the state where the angle formed between two lines, between a line and a plane, or between two planes is between 89° and 91°. Equal distances, equal angles, or equal areas refer to the state where the tolerance range is between -1% and 1%.

[0046] The present application proposes an electrical device, which includes a battery pack as described below, wherein the battery pack is used to store and output electrical energy and provide power for the electrical device, including but not limited to electric vehicles, drones, mobile power supplies, etc.; since the electrical device adopts the battery pack described below, the electrical device also has the advantages of the battery pack described below, and the present application does not elaborate on this.

[0047] like Figures 1 to 10 As shown, a battery 3 pack of a preferred embodiment of the present invention includes a box body 1, a cover body 2, a battery 3, a bus 4 and a first insulating coating 5; the box body 1 has a receiving groove 101; the cover body 2 is connected to the box body 1 and covers the notch of the receiving groove 101; the battery 3 is arranged in the receiving groove 101, the number of batteries 3 is multiple, and two adjacent batteries 3 are electrically connected through the bus 4; wherein, the bus 4 is located on the side of the battery 3 close to the cover body 2, the bus 4 has a sinking groove 401, the sinking groove 401 is located on the side of the bus 4 facing the cover body 2, the bottom surface of the sinking groove 401 is the first area 402, the side of the bus 4 facing the cover body 2 is the second area 403, the first area 402 is the welding area where the bus 4 is connected to the battery 3, and the second area 403 is coated with the first insulating coating 5.

[0048] Specifically, a first area 402 and a second area 403 are formed on the side of the bus 4 facing the cover body 2. The first area 402 is the welding area where the bus 4 is connected to the battery 3. Welding the bus 4 to the battery 3 at the first area 402 can ensure that the bus 4 is stably connected to the battery 3, and the second area 403 is coated with a first insulating coating 5. The first insulating coating 5 is used to achieve insulation between the bus 4 and the cover body 2. The first insulating coating 5 is firmly attached, highly reliable, and occupies relatively little space, so that the battery 3 package has a compact structure. In addition, the setting of the first insulating coating 5 can, on the one hand, play a role of safety protection during the assembly of the battery 3 package, preventing the operator from accidentally touching it and causing the risk of electric shock. On the other hand, it can also reduce the risk of external foreign matter such as welding slag / chips or operating tools accidentally touching the bus 4 during the operation of welding the bus 4, resulting in a short circuit, and is relatively safe.

[0049] In addition, during the welding work between the busbar 4 and the battery 3, the sink 401 can play a positioning role, facilitating the welding work; in some embodiments, the depth of the sink 401 is 1-2 mm, and the overall thickness of the busbar 4 is 1.5-5 mm. The busbar 4 that meets the above dimensions has a compact structure and occupies little space.

[0050] In actual application, the battery 3 includes a shell and a pole, the pole is connected to one of the outer wall surfaces of the shell, and the bus 4 is welded to the pole of the battery 3 to connect the battery 3 in series / parallel; and multiple battery arrays are arranged to form multiple rows and columns to form a battery pack. This is the existing technology and this application will not go into details about it.

[0051] During the charge and discharge cycle of battery 3, battery 3 will expand. The expansion will cause relative displacement between batteries 3. However, since busbar 4 and battery 3 poles are fixedly connected by welding, the expansion of battery 3 will generate a force on busbar 4 connecting two battery 3 poles. Based on this, Figure 7As shown, in the present application, the busbar 4 includes a first connecting portion 41, a second connecting portion 42 and a third connecting portion 43. The first connecting portion 41, the second connecting portion 42 and the third connecting portion 43 are all on the side facing the cover 2. The first connecting portion 41 and the second connecting portion 42 are both provided with a sink 401. The first connecting portion 41 and the second connecting portion 42 are respectively connected to two adjacent batteries 3. The third connecting portion 43 connects the first connecting portion 41 and the second connecting portion 42; the third connecting portion 43 is recessed on the side facing the cover 2 so that the side of the third connecting portion 43 facing away from the cover 2 is convex toward the side where the battery 3 is located relative to the first connecting portion 41 and the second connecting portion 42. That is, the busbar 4 is not a flat structure, and its advantages The third connection part 43 is a deformation zone that can absorb the action of force. When the bus 4 is subjected to force, the third connection part 43 can be deformed to a certain extent, thereby reducing the pulling force on the welding part or the bus 4, avoiding the welding part from breaking or the bus 4 from being pulled off, and reducing the risk of electrical connection failure; in addition, there is a certain distance between the side of the pole facing away from the shell and the side of the shell where the pole is provided, and a redundant space is formed between the plane where the side of the pole facing away from the shell and the plane where the pole is provided. Therefore, the third connection part 43 protrudes toward the side where the battery 3 is located, which can make full use of the above-mentioned redundant space. The battery 3 and the bus 4 occupy relatively less space in the accommodating slot 101, which is conducive to making the structure of the battery 3 pack more compact.

[0052] In some embodiments, the side of the third connection portion 43 facing away from the cover body 2 is recessed, so that the side of the third connection portion 43 facing the cover body 2 is convex toward the side of the cover body 2 relative to the first connection portion 41 and the second connection portion 42. In the bus 4 of this structure, the third connection portion 43 is also a deformation zone that can absorb the action of force. When the bus 4 is subjected to force, the third connection portion 43 can be deformed to a certain extent. Thus, the pulling force on the welding part or the bus 4 can also be reduced, thereby avoiding the welding part from breaking or the bus 4 from being pulled apart, thereby reducing the risk of electrical connection failure.

[0053] Further, such as Figure 7 As shown, the third connecting part 43 has a weight-reducing hole 4301, which runs through the third connecting part 43. The setting of the weight-reducing hole 4301 can, on the one hand, achieve the effect of weight reduction, and the bus 4 has the characteristic of being lightweight. On the other hand, when the bus 4 is subjected to the expansion of the battery 3 or other forces, the weight-reducing hole 4301 can provide a certain deformation space, which is more conducive to the deformation of the third connecting part 43.

[0054] like Figures 2 to 4As shown, the battery pack 3 also includes an electrical isolation plate 6, which is arranged between the battery 3 and the cover body 2. The electrical isolation plate 6 has a mounting groove 601 and a first avoidance hole 602. The mounting groove 601 is located on the side of the electrical isolation plate 6 facing the cover body 2, and the first avoidance hole 602 runs through the bottom surface of the mounting groove 601 to the side of the electrical isolation plate 6 facing the battery 3; there are multiple mounting grooves 601, and each mounting groove 601 is provided with a first avoidance hole 602. A bus 4 is arranged in a mounting groove 601, and the bottom surface of the sinking groove 401 is opposite to the first avoidance hole 602. In actual application, the pole of the battery 3 is connected to the bus 4 through the first avoidance hole 602, and a bus 4 is arranged in a mounting groove 601, which can realize electrical isolation between each bus 4 and ensure the electrical safety inside the battery pack 3.

[0055] like Figure 4 、 Figure 7 、 Figure 8 and Figure 9 As shown, the bus 4 has a first avoidance groove 404 and a first connection hole 405, the first avoidance groove 404 is located on the side of the bus 4 facing the cover body 2, the first avoidance groove 404 is spaced apart from the sinking groove 401, and the first connection hole 405 passes through the bottom surface of the first avoidance groove 404 to the side of the bus 4 facing the battery 3; the electrical isolation plate 6 has a fourth connection portion 61, the fourth connection portion 61 is located on the bottom surface of the mounting groove 601, and the fourth connection portion 61 is penetrated by the first connection hole 405, thereby enabling the bus 4 to be stably arranged in the mounting groove 601; optionally, the fourth connection portion 61 is a column, and the fourth connection portion 61 and the first connection hole 405 is interference fit to achieve the connection between the bus 4 and the electrical isolation plate 6; in some other embodiments, the fourth connecting part 61 includes a first connecting column and a first limiting block, the first connecting column passes through the first connecting hole 405, and the first limiting block is formed by melting the end of the first connecting column away from the bottom surface of the installation groove 601, the first limiting block covers the first connecting hole 405 to play a limiting role, which can improve the connection stability between the bus 4 and the electrical isolation plate 6, and the setting of the first avoidance groove 404 can provide a certain space for the first connecting column to dissolve, so as to prevent the molten liquid from protruding from the notch of the first avoidance groove 404, thereby reducing space occupancy.

[0056] In actual application, the battery pack 3 also includes an information collection component 7, which is used to collect voltage and temperature information. This is a prior art and will not be described in detail in this application. Figure 7 、 Figure 8 and Figure 9As shown in the figure, the first avoiding groove 404 has an opening 4041 facing the groove side of the mounting groove 601; wherein the groove edge of the first avoiding groove 404, the groove edge of the sink groove 401 and the outer edge of the one side of the busbar 4 facing the cover 2 enclose the second area 403, that is, the groove bottom of the first avoiding groove 404 is not an insulation area. When the information collection component 7 is arranged on the side of the electrical isolation plate 6 close to the cover 2, the collection end of the information collection component 7 is connected with the groove bottom of the first avoiding groove 404 to realize information collection. Thus, the busbar 4 realizes insulation between the cover 2 and the connection with the information collection component 7.

[0057] When the information collection component 7 is arranged between the electrical isolation plate 6 and the battery 3, as shown in the figure, Figure 5 and Figure 6 As shown in the figure, the electrical isolation plate 6 has a protruding part 62 on the side of the electrical isolation plate 6 facing the battery 3, the protruding part 62 is opposite to the mounting groove 601, and the avoiding hole penetrates from the groove bottom of the mounting groove 601 to the side of the protruding part 62 facing the battery 3; the circumferential side of the protruding part 62 is provided with a second avoiding hole 603, the second avoiding hole 603 is connected with the mounting groove 601 and the first avoiding hole 602; the information collection component 7 is inserted into the second avoiding hole 603, and the information collection component 7 is connected with the side of the busbar 4 facing the battery 3. Based on the structure of the electrical isolation plate 6 and the busbar 4, the information collection component 7 can be arranged on the side of the electrical isolation plate 6 close to the cover 2, or arranged on the side of the electrical isolation plate 6 close to the battery 3, that is, the arrangement position of the information collection component 7 can be determined according to the actual situation, and the flexibility is high.

[0058] Further, as shown in the figure, Figure 6 The battery 3 further includes a second insulation coating 8, the second insulation coating 8 is coated on the side of the busbar 4 facing the groove side of the mounting groove 601, and the second insulation coating 8 is opposite to the second avoiding hole 603. Preferably, in the connection direction of the first connecting part 41, the third connecting part 43 and the second connecting part 42, the span of the second insulation coating 8 is greater than the span of the second avoiding hole 603. Specifically, the second insulation coating 8 insulates the part of the busbar 4 facing the second avoiding hole 603, which can improve the electrical clearance and the creepage distance, and improve the electrical safety. Optionally, as shown in the figure, Figure 8 The side of the busbar 4 facing the groove side of the mounting groove 601 is completely coated with the second insulation coating 8. The advantage of this structure is that the insulation area is large and the insulation effect is good; or, as shown in the figure, Figure 9 The side of the busbar 4 facing the groove side of the mounting groove 601 is coated with the second insulation coating 8 on the part facing the second avoiding hole 603. The advantage of this structure is that the insulation area is relatively small, which reduces the production cost while ensuring the insulation effect.

[0059] In the present application, as shown in Figure 4 and Figure 10 The battery 3 bag also includes a connecting piece 9 between the electrical isolation plate 6 and the battery 3, and the connecting piece 9 is connected with the electrical isolation plate 6, wherein the connecting piece 9 is arranged between the adjacent two first avoiding holes 602, and the connecting piece 9 at least partially extends to the side of the first avoiding hole 602 close to the battery 3, and the part of the connecting piece 9 can play a limiting role, that is, the busbar 4 is connected with the electrical isolation plate 6 through the fourth connecting part 61, and is limited on the electrical isolation plate 6 through the connecting piece 9, based on which, the busbar 4 can be stably connected on the electrical isolation plate 6, and the structural reliability is high; as one of the implementations of the present application, the electrical isolation plate 6 has a second avoiding groove 604 and a second connecting hole 605, the second avoiding groove 604 is located on the side of the electrical isolation plate 6 facing the cover 2, and the second connecting hole 605 penetrates from the groove bottom surface of the second avoiding groove 604 to the side of the electrical isolation plate 6 facing the battery 3; the connecting piece 9 has a fifth connecting part 91, the fifth connecting part 91 is located on the side of the connecting piece 9 away from the battery 3, and the fifth connecting part 91 penetrates the second connecting hole 605; wherein, optionally, the fifth connecting part 91 is a column body, which is in interference fit with the second connecting hole 605, so as to realize the connection of the connecting piece 9 and the electrical isolation plate 6; in other embodiments, the fifth connecting part 91 includes a second connecting column and a second limiting block, the second connecting column penetrates the second connecting hole 605, and the second limiting block is located in the second avoiding groove 604, and the second limiting block is formed by melting the end of the second connecting column away from the groove bottom surface of the mounting groove 601, the second limiting block covers the second connecting hole 605 to play a limiting role, so as to improve the connection stability of the connecting piece 9 and the electrical isolation plate 6, so that the busbar 4 is stably connected with the electrical isolation plate 6, and the arrangement of the second avoiding groove 604 can provide a certain space for the dissolution of the second connecting column, so as to prevent the molten liquid from protruding from the slot of the second avoiding groove 604, and reduce the occupation of space.

[0060] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A battery pack, characterized in that: It comprises a box body (1), a cover body (2), a battery (3), a busbar (4) and a first insulating coating (5); The box body (1) has a receiving groove (101); The cover (2) is connected to the box (1) and covers the notch of the receiving groove (101); The battery (3) is arranged in the receiving slot (101), the number of the battery (3) is multiple, and two adjacent batteries (3) are electrically connected via the busbar (4); The busbar (4) is located on a side of the battery (3) close to the cover (2), and the busbar (4) has a sink (401). The sink (401) is located on a side of the busbar (4) facing the cover (2). The bottom surface of the sink (401) is a first area (402), and the side of the busbar (4) facing the cover (2) is a second area (403). The first area (402) is a welding area for connecting the busbar (4) and the battery (3), and the second area (403) is coated with the first insulating coating (5).

2. The battery pack according to claim 1, wherein: The busbar (4) comprises a first connecting portion (41), a second connecting portion (42) and a third connecting portion (43); the first connecting portion (41), the second connecting portion (42) and the third connecting portion (43) facing the cover (2) are all the second area (403); the first connecting portion (41) and the second connecting portion (42) are both provided with the sink (401); the first connecting portion (41) and the second connecting portion (42) are respectively connected to two adjacent batteries (3); the third connecting portion (43) connects the first connecting portion (41) and the second connecting portion (42); The third connecting portion (43) is recessed on one side facing the cover (2), so that the side of the third connecting portion (43) facing away from the cover (2) is convex toward the side where the battery (3) is located relative to the first connecting portion (41) and the second connecting portion (42). or, The side of the third connecting portion (43) facing away from the cover body (2) is recessed, so that the side of the third connecting portion (43) facing the cover body (2) is convex toward the side of the cover body (2) relative to the first connecting portion (41) and the second connecting portion (42).

3. The battery pack according to claim 2, wherein: The third connecting portion (43) has a weight-reducing hole (4301), and the weight-reducing hole (4301) passes through the third connecting portion (43).

4. The battery pack according to claim 1, wherein: The device further comprises an electrical isolation plate (6), the electrical isolation plate (6) being arranged between the battery (3) and the cover body (2), the electrical isolation plate (6) having a mounting groove (601) and a first avoidance hole (602), the mounting groove (601) being located on a side of the electrical isolation plate (6) facing the cover body (2), and the first avoidance hole (602) penetrating from the bottom surface of the mounting groove (601) to a side of the electrical isolation plate (6) facing the battery (3); There are a plurality of mounting grooves (601), each of which is provided with the first avoidance hole (602), one busbar (4) is provided in one mounting groove (601), and the bottom surface of the sink groove (401) is opposite to the first avoidance hole (602).

5. The battery pack according to claim 4, characterized in that: The busbar (4) has a first avoidance groove (404) and a first connection hole (405); the first avoidance groove (404) is located on a side of the busbar (4) facing the cover body (2); the first avoidance groove (404) is spaced apart from the sink groove (401); and the first connection hole (405) extends from the bottom surface of the first avoidance groove (404) to a side of the busbar (4) facing the battery (3); The electrical isolation plate (6) has a fourth connection portion (61), the fourth connection portion (61) is located at the bottom surface of the installation groove (601), and the fourth connection portion (61) is penetrated by the first connection hole (405).

6. The battery pack according to claim 5, characterized in that: The first avoidance groove (404) has an opening (4041), and the opening (4041) faces the groove side of the installation groove (601); The notch edge of the first avoidance groove (404), the notch edge of the sink groove (401), and the outer edge of the busbar (4) facing the cover body (2) form the second area (403).

7. The battery pack according to claim 4, characterized in that: The electrical isolation plate (6) has a raised portion (62), the raised portion (62) is located on a side of the electrical isolation plate (6) facing the battery (3), the raised portion (62) is directly opposite the mounting groove (601), and the avoidance hole passes through the bottom surface of the mounting groove (601) to the side of the raised portion (62) facing the battery (3); A second avoidance hole (603) is provided on the peripheral side surface of the protruding portion (62), and the second avoidance hole (603) is connected to the mounting groove (601) and the first avoidance hole (602); The battery pack further comprises an information collection component (7), the information collection component (7) being arranged between the electrical isolation plate (6) and the battery (3), the information collection component (7) being inserted into the second avoidance hole (603), and the information collection component (7) being connected to a side of the busbar (4) facing the battery (3).

8. The battery pack according to claim 7, characterized in that: It also includes a second insulating coating (8), which is coated on one side of the busbar (4) facing the side of the mounting groove (601), and the second insulating coating (8) is opposite to the second avoidance hole (603).

9. The battery pack according to claim 4, characterized in that: The invention also includes a connecting member (9), which is located between the electrical isolation plate (6) and the battery (3), and is connected to the electrical isolation plate (6), wherein the connecting member (9) is provided between two adjacent first avoidance holes (602), and the connecting member (9) at least partially extends to the side of the first avoidance hole (602) close to the battery (3).

10. The battery pack according to claim 9, characterized in that: The electrical isolation plate (6) has a second avoidance groove (604) and a second connection hole (605), wherein the second avoidance groove (604) is located on a side of the electrical isolation plate (6) facing the cover body (2), and the second connection hole (605) passes through the bottom surface of the second avoidance groove (604) to a side of the electrical isolation plate (6) facing the battery (3); The connecting member (9) has a fifth connecting portion (91), the fifth connecting portion (91) is located on a side of the connecting member (9) facing away from the battery (3), and the second connecting hole (605) is penetrated by the fifth connecting portion (91).

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

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