Battery pack and electric device

Abstract

The utility model relates to the technical field of power utilization devices, and discloses a battery pack and a power utilization device, the battery pack has a first direction, a second direction and a third direction which are intersected pairwise, and the battery pack comprises a box body, a cover body, a battery, an electrical isolation plate and a bus piece. The box body is provided with a containing cavity, and the cover body is connected with the box body and covers the containing cavity. The battery is arranged in the containing cavity, the electrical isolation plate is arranged in the box body and located between the battery and the cover body, a containing groove and a through hole are formed in the electrical isolation plate, the through hole penetrates through the electrical isolation plate in the third direction, and first openings communicated with the through hole are formed in the two side walls, in the first direction, of the containing groove in a penetrating mode correspondingly. And the confluence piece is arranged in the placing groove and is connected with the battery. When the containing cavity is filled with glue, part of the glue flowing into the containing groove can penetrate through the first opening to enter the through hole and then penetrate through the through hole to be filled between the electrical isolation plate and the battery. The glue does not need to overflow to the through hole after the placing groove is filled with the glue, so that the mold filling efficiency of the glue during glue injection is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power utilization devices, in particular to a battery pack and a power utilization device. BACKGROUND

[0002] The battery pack is an energy storage device composed of multiple batteries. The multiple batteries are sequentially arranged in the accommodating cavity in the box body. An electrical isolation plate is arranged between the batteries and the box body. The electrical isolation plate is provided with a placement groove for placing a busbar and a through hole, the placement groove is provided with a pole column hole through which a pole column of a battery passes, and the pole column passes through the pole column hole and is connected with the busbar in the placement groove.

[0003] In order to improve the structural strength of the battery pack and ensure the connection and fixing effect of the battery, a method of filling glue in the box body is adopted, and a through hole is formed on the electrical isolation plate to increase the contact area between the battery and the filled glue and improve the connection and fixing effect.

[0004] However, when the glue is injected, only the glue flowing to the through hole can directly enter between the electrical isolation plate and the battery, and the glue falling into the placement groove needs to overflow and flow to the through hole before entering between the electrical isolation plate and the battery, and the glue flow is not smooth, and the filling efficiency is low.

[0005] Therefore, how to solve or improve the problem of low filling efficiency when injecting glue into the accommodating cavity of the battery pack in the prior art has become an important technical problem to be solved by the technical personnel in the field. Practical new type content

[0006] Therefore, the present application provides a battery pack and a power utilization device to solve or improve the problem of low filling efficiency when injecting glue into the accommodating cavity of the battery pack.

[0007] In a first aspect, the present application provides a battery pack having a first direction, a second direction and a third direction intersecting with each other, comprising:

[0008] a box body provided with an accommodating cavity;

[0009] a cover body connected with the box body and covering the accommodating cavity;

[0010] a battery arranged in the accommodating cavity;

[0011] an electrical isolation plate arranged in the box body and located between the battery and the cover body, the electrical isolation plate being provided with a placement groove and a through hole, the through hole penetrating the electrical isolation plate along the third direction, at least one side wall of the placement groove being provided with a first opening along the first direction, the first opening penetrating the side wall of the placement groove along the first direction, and the first opening being communicated with the through hole;

[0012] A current collector is arranged in the placing groove and connected with the battery.

[0013] Optionally, a plurality of placing grooves and a plurality of through holes are arranged along the first direction, and the placing grooves and the through holes are arranged alternately along the first direction, and the first opening is in communication with the through hole.

[0014] Optionally, a plurality of batteries are arranged along the first direction, and the through hole is arranged one by one with the battery, and along the first direction, the current collector connects two adjacent batteries.

[0015] A plurality of batteries are arranged along the second direction. A plurality of placing grooves and a plurality of through holes are arranged along the second direction, and the through hole is arranged one by one with the battery.

[0016] Optionally, the electrical isolation plate comprises a plurality of isolation plate bodies and a plurality of connecting strips, a plurality of the isolation plate bodies are arranged along the first direction, the isolation plate body is provided with the placing groove, a plurality of the connecting strips are arranged along the second direction, the connecting strip extends along the first direction and connects two adjacent isolation plate bodies, and along the first direction, two adjacent isolation plate bodies along the second direction and two adjacent connecting strips along the second direction enclose the through hole.

[0017] Optionally, the bottom wall of the placing groove is provided with a second opening near one side of the connecting strip, the second opening penetrates the isolation plate body along the third direction, and the second opening is in communication with the first opening.

[0018] Optionally, the isolation plate body is further provided with a third opening on the side facing the cover, the third opening penetrates the isolation plate body along the third direction, and the third opening is in communication with the first opening.

[0019] Optionally, the battery pack further comprises a flexible circuit board, the flexible circuit board comprises a flexible circuit board body and a collection terminal connected with each other, the flexible circuit board body is connected with the current collector through the collection terminal, the flexible circuit board body is located on the side of the electrical isolation plate away from the cover, a fourth opening is opened in the groove bottom of the placing groove, the fourth opening is in communication with the first opening, and the collection terminal penetrates the fourth opening and is connected with the side of the current collector facing the battery.

[0020] Optionally, the groove bottom of the placing groove is connected with a positioning column, and the current collector is provided with a positioning hole matched with the positioning column.

[0021] Optionally, at least two positioning columns are arranged, at least two positioning holes are arranged, and the positioning hole is one by one corresponding with the positioning column.

[0022] In a second aspect, the application further provides a battery pack for a power consuming device.

[0023] The battery pack provided by the application comprises a box body, a cover body, a battery, an electrical isolation plate and a busbar. An accommodating cavity with an opening is formed in the interior of the box body. The battery is placed in the accommodating cavity through the opening. Then the cover body is connected to the box body. The cover body is arranged at the opening to close the accommodating cavity, so as to enclose the battery in the box body. Before the cover body is arranged, the electrical isolation plate is arranged in the accommodating cavity. After the cover body is arranged, the electrical isolation plate is located between the battery and the cover body. The electrical isolation plate is provided with a slot and a through hole. The busbar is fixedly arranged in the slot and connected to the battery, and the through hole penetrates the electrical isolation plate. Before the cover body is arranged, the accommodating cavity is filled with glue to play a role of insulation and stability.

[0024] When the accommodating cavity is filled with glue, part of the glue directly fills between the electrical isolation plate and the battery through the through hole, and part of the glue flowing into the slot can enter the through hole through the first opening and then fill between the electrical isolation plate and the battery through the through hole. Without waiting for the glue to overflow from the slot to the through hole after filling the slot, the glue filling efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the specific embodiments or the related art, the drawings needed to be used in the specific embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 A structural schematic diagram of a battery pack according to an embodiment of the application;

[0027] Figure 2 A structural schematic diagram of a battery pack according to an embodiment of the application after the cover body is hidden;

[0028] Figure 3 A structural schematic diagram of a box body of a battery pack according to an embodiment of the application;

[0029] Figure 4 A connection schematic diagram of an electrical isolation plate and a battery of a battery pack according to an embodiment of the application;

[0030] Figure 5 A structural schematic diagram of a battery pack according to an embodiment of the application; Figure 4 An enlarged schematic diagram of A in FIG. 8;

[0031] Figure 6 A first perspective schematic diagram of an electrical isolation plate of a battery pack according to an embodiment of the application;

[0032] Figure 7 FIG. 7 is a second perspective view of an electrical isolation plate of a battery pack according to an embodiment of the present application;

[0033] Figure 8 FIG. 8 is an enlarged view of B in FIG. 7; Figure 7

[0034] Figure 9 FIG. 9 is a structure diagram of a busbar of a battery pack according to an embodiment of the present application.

[0035] Explanation of Reference Signs:

[0036] 1, box; 2, accommodating cavity; 3, cover; 4, battery; 5, electrical isolation plate; 51, isolation plate body; 52, connecting strip; 521, protruding portion; 522, recessed portion; 6, busbar; 7, placing groove; 8, through hole; 9, first opening; 10, flexible circuit board; 101, flexible circuit board body; 102, acquisition terminal; 11, fourth opening; 12, positioning column; 13, positioning hole; 14, second opening; 15, third opening. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. In addition, in the description of the present application, the term "comprising" means "including but not limited to". The terms first, second, third, etc. are only used as labels, and do not impose numerical requirements or establish sequences.

[0038] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0039] ​In this application, unless otherwise clearly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0040] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited.

[0041] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0042] The embodiments of the application will be described below in conjunction with Figures 1 to 9 .

[0043] According to the embodiments of the application, in one aspect, a battery pack is provided. It has a first direction X, a second direction Y and a third direction Z. Wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other to form a spatial rectangular coordinate system.

[0044] As Figures 1 to 3 shown, the battery pack includes a box body 1, a cover body 3, a battery 4, an electrical isolation plate 5 and a busbar 6.

[0045] An accommodating cavity 2 is formed in the interior of the box body 1, and the accommodating cavity 2 is provided with an opening in the third direction Z. The battery 4 is placed into the accommodating cavity 2 from the opening. Then the cover body 3 is connected to the box body 1. So that the cover body 3 covers the opening to close the accommodating cavity 2, so as to close the battery 4 in the box body 1.

[0046] Before the cover body 3 is set, the electrical isolation plate 5 is arranged in the accommodating cavity 2. After the cover body 3 is set, the electrical isolation plate 5 is located between the battery 4 and the cover body 3. Thus, the electrical isolation plate 5 plays a role of isolation, and separates the battery 4 and the cover body 3.

[0047] The electrical isolation plate 5 is provided with a placing groove 7 and a through hole 8. The current collecting piece 6 is fixedly arranged in the placing groove 7 and connected with the battery 4. The current collecting piece 6 can be connected with the flexible circuit board body 101 through the collecting terminal 102 such as a nickel sheet, and is used for collecting information data of the battery.

[0048] The through hole 8 is arranged along the third direction Z and penetrates the electrical isolation plate 5. Before the cover body 3 is set, the glue is filled into the accommodating cavity 2, the glue is filled between the electrical isolation plate 5 and the battery 4 through the through hole 8, and after the glue is solidified, the role of insulation is played, and the overall stability is improved.

[0049] For the four side walls of the placing groove 7, at least one of the two side walls along the first direction X is provided with a first opening 9, so that the first opening 9 penetrates the side wall of the placing groove 7 along the first direction X. Further, the inside of the placing groove 7 is communicated with the through hole 8 through the first opening 9. In this way, when the glue is filled into the accommodating cavity 2, part of the glue is directly filled between the electrical isolation plate 5 and the battery 4 through the through hole 8, and part of the glue flowing into the placing groove 7 can enter the through hole 8 through the first opening 9 and then be filled between the electrical isolation plate 5 and the battery 4 through the through hole 8. Without waiting for the glue to overflow into the through hole 8 after filling the placing groove 7, the glue filling efficiency is higher when filling the glue. After the glue is filled, the cover body 3 is connected to the box body 1 to close the accommodating cavity 2.

[0050] In an optional embodiment, as shown in Figures 4 to 8 The placing groove 7 is arranged along the first direction, and the current collecting piece 6 is arranged in each placing groove 7. Each current collecting piece 6 is connected with the battery, and each current collecting piece collects information.

[0051] The placing groove 7 and the through hole 8 are arranged along the first direction X. That is, along the first direction X, one through hole 8 is arranged first, then one placing groove 7 is arranged, then one through hole 8 is arranged, and then one placing groove 7 is arranged. In this way, the two sides of the placing groove 7 are adjacent to two through holes 8. In this way, when the glue is filled into the accommodating cavity 2, part of the glue is directly filled between the electrical isolation plate 5 and the battery 4 through the through hole 8, and the glue flowing into each placing groove 7 can enter the through hole 8 on both sides of the placing groove 7 through the two first openings 9 in the placing groove 7, and then be filled between the electrical isolation plate 5 and the battery 4 through the through hole 8.

[0052] Further, as shown in Figure 4As shown, the batteries 4 are arranged in a plurality along the first direction X to form a battery group. Each of the through holes 8 corresponds to one of the batteries 4 and is arranged along the third direction Z. Two adjacent batteries are connected to the busbar 6 in one of the placement grooves 7, i.e. the positive pole of one of the batteries 4 is connected to the first end of the busbar 6 and the negative pole of the other battery is connected to the second end of the busbar 6, so that the two adjacent batteries are connected in series through the busbar.

[0053] When the glue is filled into the accommodating cavity 2, the glue flowing into each of the placement grooves 7 can pass through the two first openings 9 in the placement groove 7, pass through the through hole 8 after passing through the two through holes 8 on both sides, and then fill between each of the batteries 4 and the electrically isolating plate 5.

[0054] The batteries 4 are arranged in a plurality along the second direction Y to form a battery group. The through holes 8 are arranged in a plurality along the second direction Y, and each of the through holes 8 corresponds to one of the batteries 4 and is arranged along the third direction Z of the battery 4. The placement grooves 7 are arranged in a plurality along the second direction Y, and each of the placement grooves 7 corresponds to one of the through holes 8 and is arranged on the groove wall of each of the placement grooves 7. The busbar 6 in each of the placement grooves 7 is connected to one of the batteries.

[0055] In an optional embodiment, as shown, Figures 6 to 8 The electrically isolating plate 5 includes a plurality of isolating plate bodies 51 and a plurality of connecting strips 52. The plurality of isolating plate bodies 51 are arranged in a plurality along the first direction X, the plurality of connecting strips 52 are arranged in a plurality along the second direction Y, and one side of each of the isolating plate bodies 51 is connected to two of the connecting strips 52. The two connecting strips extend along the first direction X. The two connecting strips 52 on one of the isolating plate bodies 51 are connected to the side of another of the isolating plate bodies 51 away from the connecting strips 52. At this time, the two isolating plate bodies 51 are connected through the connecting strips 52, and the two isolating plate bodies 51 are arranged along the first direction X. By analogy, the isolating plate bodies 51 and the connecting strips 52 are arranged in a plurality. Each of the two isolating plate bodies 51 and the two connecting strips 52 enclose the through hole 8.

[0056] Each of the isolating plate bodies 51 is arranged in the third direction Z at the position between the two adjacent batteries 4, and each of the isolating plate bodies 51 is provided with one of the placement grooves 7. The two ends of the busbar 6 in each of the placement grooves 7 are connected to the two adjacent batteries. At this time, the connecting strips 52 connected to each of the isolating plate bodies 51 are arranged in the third direction Z of one of the batteries 4, so that the through hole 8 is arranged in the third direction Z of the battery 4, and the glue can flow to the battery 4 through the through hole 8.

[0057] The connecting strip 52 comprises a plurality of protrusions 521 and recesses 522. The protrusions 521 and the recesses 522 are arranged alternately and connected sequentially, so as to form the connecting strip 52 with concave-convex undulation along the first direction X. The protrusions 521 are formed in the third direction, and the recesses 522 are formed in the opposite direction of the third direction.

[0058] In this way, after the glue is poured, the glue will bury the connecting strip 52. At this time, the glue is filled in the groove formed by the protrusion 521 and the groove formed by the recess 522, and the protrusion 521 and the recess 522 play a reinforcing role, further increasing the overall stability.

[0059] It is worth noting that for each isolation plate body 51, the connecting strip 52 arranged thereon can also be more than two, and a through hole 8 is formed between every two connecting strips 52.

[0060] As an optional embodiment, as shown in Figure 5 and Figure 8 A second opening 14 is formed on the bottom wall of the placement groove 7 along the third direction Z, so that the second opening 14 penetrates the electrical isolation plate 5 along the third direction Z. The second opening 14 is arranged on the side of the bottom wall of the placement groove 7 close to the connecting strip 52, and is in communication with the first opening 9 to form a large opening.

[0061] In this way, after the glue flows into the placement groove 7, it can not only flow onto the battery 4 through the first opening 9 and then enter the through hole 8, but also flow directly onto the battery 4 through the second opening 14. Further improve the efficiency of the glue flowing out of the placement groove 7, thereby improving the filling efficiency of the glue.

[0062] As an optional embodiment, as shown in Figure 5 and Figure 8 A third opening 15 is further arranged on the side of the isolation plate body 51 facing the cover 3, so that the third opening 15 penetrates the isolation plate body 51 along the third direction Z. The third opening 15 is in communication with the first opening 9 to form a large opening.

[0063] In this way, not only the glue flowing into the placement groove 7 can flow onto the battery 4 through the first opening 9 and then enter the through hole 8, but also the glue flowing onto the position of the third opening 15 on the electrical isolation plate 5 can enter the first opening 9 through the third opening 15, and then flow onto the battery 4 through the first opening 9 and then enter the through hole 8. Further improve the filling efficiency of the glue.

[0064] As an optional embodiment, as shown in Figure 5 and Figure 8 The battery pack further comprises a flexible circuit board 10, and the flexible circuit board 10 comprises a flexible circuit board body 101 and a collection terminal 102.

[0065] A fourth opening 11 is provided at the bottom of the placement slot 7, making the fourth opening 11 connected to the first opening 9 to form a large opening. The first end of the acquisition terminal 102 is connected to the flexible circuit board body 101, and the second end of the acquisition terminal 102 passes through the fourth opening 11 and enters the placement slot 7, connecting to the side of the busbar 6 facing the battery 4. Thus, the flexible circuit board body 101 is connected to the busbar 6 through the acquisition terminal 102. Various information data of the battery 4 can be acquired through the acquisition terminal 102 and exported through the flexible circuit board body 101.

[0066] Moreover, after the adhesive enters the placement tank 7, it can leak onto the battery 4 through the gaps in the fourth opening 11 other than the area occupied by the collection terminal 102, further improving the filling efficiency of the adhesive.

[0067] The flexible circuit board body 101 is located on the side of the electrical isolation plate 5 away from the cover 3, that is, the flexible circuit board body 101 and the electrical isolation plate 5 are arranged sequentially along the third direction Z.

[0068] It is worth noting that when both the second opening 14 and the fourth opening 11 exist, the second opening 14 and the fourth opening 11 can have the same feature, or they can be connected into a large opening. It is sufficient to ensure that the acquisition terminal 102 can be inserted into the placement slot 7 and connected to the busbar 6.

[0069] In some embodiments, such as Figure 9 As shown, a positioning post 12 is connected to the bottom of the placement groove 7, and the positioning post 12 is set along the third direction Z. Correspondingly, a positioning hole 13 is provided on the manifold 6. When the manifold 6 is placed into the placement groove 7, the positioning post 12 can be inserted into the positioning hole 13 to ensure that the manifold 6 is installed in place.

[0070] In a further embodiment, at least two positioning posts 12 and at least two positioning holes 13 are provided, and the number of positioning holes 13 is the same as the number of positioning posts 12 and corresponds one-to-one.

[0071] For example, two positioning pins 12 and two positioning holes 13 are provided. When placing the manifold 6 into the placement groove 7, align the first positioning hole 13 on the manifold 6 with the first positioning pin 12 at the bottom of the placement groove 7, and align the second positioning hole 13 on the manifold 6 with the second positioning pin 12 at the bottom of the placement groove 7. Then place the manifold 6 into the placement groove 7, so that the first positioning hole 13 fits onto the first positioning pin 12 and the second positioning hole 13 fits onto the second positioning pin 12.

[0072] The combination of these two sets of positioning pins 12 and positioning holes 13 positions the manifold 6 and the placement slot 7 more accurately.

[0073] According to the embodiments of the present application, in another aspect, there is provided a power-using device comprising any of the battery packs described above. The technical effects brought by the power-using device are consistent with those of the battery pack, and thus will not be described again.

[0074] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be suggested by those skilled in the art without departing from the spirit and scope of the present application, and it is intended that the present application encompass such modifications and changes as fall within the scope of the appended claims.

Claims

1. A battery pack having a first direction (X), a second direction (Y), and a third direction (Z) that intersect two by two, characterized in that, The utility model relates to a battery box, including: a box (1) is provided with holding cavity (2); Cover (3) is connected with the box (1) and covers holding cavity (2); Battery (4) is arranged in holding cavity (2); Electricity isolation board (5) is arranged in the box (1) and is located between battery (4) and cover (3), electricity isolation board (5) is equipped with placing groove (7) and through -hole (8), through -hole (8) is along third direction (Z) and penetrates electricity isolation board (5), placing groove (7) is equipped with first opening (9) in at least one side wall of two side walls in first direction (X), first opening (9) is along first direction (X) and penetrates the side wall of placing groove (7), and first opening (9) is communicated with through -hole (8) and placing groove (7); Confluence piece (6) is arranged in placing groove (7) and is connected with battery (4).

2. The battery pack of claim 1, wherein, Placing groove (7) and through -hole (8) are all along first direction (X) and are provided with multiple, and placing groove (7) and through -hole (8) are along first direction (X) and are alternately arranged, and first opening (9) is communicated with through -hole (8) correspondingly.

3. The battery pack of claim 2, wherein, Battery (4) is along first direction (X) and is provided with multiple, and through -hole (8) is correspondingly arranged with battery (4), along first direction (X), and confluence piece (6) connects two adjacent battery (4); Battery (4) is provided with multiple and is along second direction (Y) and is arranged, and placing groove (7) and through -hole (8) are all along second direction (Y) and are provided with multiple, and through -hole (8) is correspondingly arranged with battery (4).

4. The battery pack of claim 1, wherein, Electricity isolation board (5) includes multiple isolation board bodies (51) and multiple connecting strips (52), multiple isolation board bodies (51) are spaced apart along first direction (X), and isolation board body (51) is equipped with placing groove (7), multiple connecting strips (52) are spaced apart along second direction (Y), and connecting strip (52) extends along first direction (X) and is connected with two adjacent isolation board bodies (51), and two adjacent isolation board bodies (51) along first direction (X) and two adjacent connecting strips (52) along second direction (Y) are enclosed and form through -hole (8).

5. The battery pack of claim 4, wherein, The bottom wall of the placing groove (7) is provided with a second opening (14) on one side close to the connecting strip (52), the second opening (14) penetrates the isolation board body (51) along the third direction (Z), and the second opening (14) is communicated with the first opening (9).

6. The battery pack of claim 4, wherein, The side of the isolation board body (51) facing the cover (3) is further provided with a third opening (15), the third opening (15) penetrates the isolation board body (51) along the third direction (Z), and the third opening (15) is communicated with the first opening (9).

7. The battery pack of claim 1, wherein, The battery pack further comprises a flexible circuit board (10) comprising a flexible circuit board body (101) and a collection terminal (102) connected to each other, the flexible circuit board body (101) is connected with the busbar (6) through the collection terminal (102), the flexible circuit board body (101) is located on the side of the electrically isolated plate (5) away from the cover (3), a fourth opening (11) is formed in the bottom of the placing groove (7), the fourth opening (11) is communicated with the first opening (9), and the collection terminal (102) is connected with one side of the busbar (6) facing the battery (4) and penetrating through the fourth opening (11).

8. The battery pack of claim 1, wherein, A positioning column (12) is connected to the bottom of the placing groove (7), and a positioning hole (13) matched with the positioning column (12) is arranged on the busbar (6).

9. The battery pack of claim 8, wherein, At least two positioning columns (12) and at least two positioning holes (13) are arranged, and the positioning hole (13) corresponds to the positioning column (12) one by one.

10. An electrical device, characterized by The battery pack comprises any one of claims 1 to 9.

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