CN215119171U

CN215119171U - Battery core, battery module and electric equipment

Info

Publication number: CN215119171U
Application number: CN202121326939.9U
Authority: CN
Inventors: 蔡家榕; 张静; 李佳颖; 徐浩然
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-12-10
Anticipated expiration: 2031-06-15

Abstract

The application discloses electric core, including casing, first utmost point ear and second utmost point ear stretch out the same one end of casing, and the width direction of casing is the first direction, and the central line of casing on the first direction is first central line, and first utmost point ear and second utmost point ear all do not overlap with first central line, and first utmost point ear and second utmost point ear do not overlap, and the mirror image along first central line of first utmost point ear and second utmost point ear does not overlap. The application also discloses a battery module and electric equipment with the battery core. The battery cores are assembled into the battery module without using an extra adapter and the mutual interference of the lugs is effectively avoided.

Description

Battery core, battery module and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to an electric core, a battery module and electric equipment.

Background

In order to obtain a higher supply voltage or a higher nominal capacity, a plurality of battery cells are often combined in series or in parallel to form a battery module. In the existing battery module, the arrangement mode of each battery cell mainly has a stacked type or a side-by-side type, and the tab of each battery cell is required to be connected with a battery circuit board in the battery module.

However, when the existing battery module is assembled, in order to avoid mutual interference of the tabs of each battery cell, the connection position of the tabs of the battery cells on the circuit board often needs to be adjusted through an additional adapter, so that the cost is high and the process is complex.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing, it is desirable to provide a battery cell that does not require an additional adaptor and effectively prevents the tabs from interfering with each other, and a battery module and an electrical device having the battery cell.

The embodiment of the application provides a battery cell, including casing, first utmost point ear and second utmost point ear stretch out the same one end of casing, and the width direction of casing is the first direction, and the central line of casing on the first direction is first central line, and first utmost point ear and second utmost point ear all do not overlap with first central line, and first utmost point ear and second utmost point ear do not overlap, and the mirror image along first central line of first utmost point ear and second utmost point ear does not overlap.

The embodiment of the application comprises the following technical effects: the first tab and the second tab may be located on one side of the first center line, or the first tab and the second tab are located on two sides of the first center line, respectively. Through first utmost point ear and second utmost point ear all not overlapping with first central line, first utmost point ear and second utmost point ear are all not overlapping along the mirror image of first central line to the utmost point ear of being convenient for electric core when a plurality of electric cores assemble into battery module (be first utmost point ear and second utmost point ear) arrange, effectively avoid the utmost point ear mutual interference of electric core, need not to adjust the hookup location of electric core utmost point ear on the circuit board through extra adaptor, effective reduce cost and simplify assembly process.

Some embodiments of the present application further comprise: along first direction, the size of first utmost point ear and second utmost point ear is R1 and R2 respectively, and the central line of first utmost point ear and second utmost point ear on first direction is second central line and third central line respectively, and interval D between second central line and the third central line satisfies: d is not less than (R1+ R2)/2.

Technical effects included in some embodiments of the present application: through D ≧ (R1+ R2)/2, a gap exists between the second central line and the third central line, and mutual interference of lugs of the battery cell is effectively avoided.

Some embodiments of the present application further comprise: the dimension H of the housing in the first direction satisfies: h is more than or equal to 2(R1+ R2).

Technical effects included in some embodiments of the present application: h is more than or equal to 2(R1+ R2), so that the lugs of at least two battery cells are arranged at the end part of the shell of one battery cell along the width direction, and the mutual interference of the lugs of the battery cells is effectively avoided.

Some embodiments of the present application further comprise: the center line between the second center line and the third center line is a fourth center line, and the distance W between the fourth center line and the first center line satisfies the following conditions: w > (R1+ R2)/4.

Technical effects included in some embodiments of the present application: w > (R1+ R2)/4 is adopted to enable a gap with the width of at least accommodating one lug to be formed between the mirror image of the first pole lug along the first central line and the second pole lug, and further enable the gap with the width of at least accommodating one lug to be formed between the mirror image of the first pole lug and the mirror image of the second pole lug along the first central line, so that the first pole lug and the second pole lug are not overlapped along the mirror image of the first central line, and the mutual interference of the pole lugs of the battery cell is effectively avoided.

Some embodiments of the present application further comprise: the edge of the shell in the first direction is a first edge, and the distance M between the first lug and the first edge and the distance M between the second lug and the first edge satisfy the following conditions: m is more than or equal to 3 mm.

Technical effects included in some embodiments of the present application: m is larger than or equal to 3mm, so that the phenomenon that the pole lug is too close to the edge and the pole lug loss is easily caused is prevented, and the sealing of the shell is prevented from being influenced.

Some embodiments of the present application further comprise: the first pole lug and the second pole lug are positioned on two opposite sides of the first central line.

Technical effects included in some embodiments of the present application: the first lug and the second lug of at least two electric cores are arranged at intervals in sequence, and mutual interference of the lugs of the electric cores is effectively avoided.

Some embodiments of the present application further comprise: the size H of the housing along the first direction is 4(R1+ R2), and the distance W between the fourth center line and the first center line is (R1+ R2)/2.

Technical effects included in some embodiments of the present application: by W being equal to (R1+ R2)/2, the gap between the mirror image of the first pole lug along the first central line and the second pole lug is at least 2W, the gap with the width at least accommodating two pole lugs is formed between the mirror image of the first pole lug along the first central line and the second pole lug, the gap with the width at least accommodating two pole lugs is formed between the mirror image of the first pole lug and the mirror image of the second pole lug along the first central line, the mirror images of the first pole lug and the second pole lug along the first central line are further not overlapped, and mutual interference of the pole lugs of the battery cell is effectively avoided.

The embodiment of the application provides a battery module, and battery module still includes two foretell electric cores, and two electric cores are piled up the setting, and the big face of two electric cores is towards opposite direction, and the first utmost point ear and the second utmost point ear of one of them electric core are connected in the first surface of circuit board, and first utmost point ear and the second utmost point ear in another electric core are connected in the second surface of circuit board.

Technical effects included in some embodiments of the present application: the first lug and the second lug of one of the battery cells are connected to the first surface of the circuit board, and the first lug and the second lug of the other battery cell are connected to the second surface of the circuit board, so that the lugs of the two battery cells are staggered with each other, and the mutual interference of the lugs of the battery cells is effectively avoided. And the connecting position of the battery core lug on the circuit board is not required to be adjusted through an additional adapter, so that the cost is effectively reduced, and the assembly process is simplified. And through the arrangement mode of the utmost point ear of above-mentioned electric core, avoid using the great circuit board of width to effectively reduce the volume of battery module, improve battery module capacity density.

The embodiment of the application provides a battery module, and battery module still includes two foretell electric cores, and two electric cores set up in the both sides that the circuit board is relative, and the big face of two electric cores is towards the same direction, and electric core is equipped with the one end orientation circuit board of utmost point ear, and first utmost point ear and second utmost point ear in two electric cores set up at interval in proper order.

Technical effects included in some embodiments of the present application: the first pole lug and the second pole lug in the two battery cells are arranged at intervals in sequence, so that mutual interference of the pole lugs of the battery cells is effectively avoided. And the connecting position of the battery core lug on the circuit board is not required to be adjusted through an additional adapter, so that the cost is effectively reduced, and the assembly process is simplified. And through the arrangement mode of the utmost point ear of above-mentioned electric core, avoid using the great circuit board of width to effectively reduce the volume of battery module, improve battery module capacity density.

The embodiment of the application provides a consumer, including foretell battery module, the battery module is used for supplying power for the consumer.

Technical effects included in some embodiments of the present application: through the cost and the volume that reduce battery module, effectively reduce consumer's cost and volume.

In the battery cell, the battery module and the electric equipment provided by the embodiment of the application, the first tab and the second tab of the battery cell can be located on one side of the first central line, or the first tab and the second tab are respectively located on two sides of the first central line. Through first utmost point ear and second utmost point ear all not overlapping with first central line, first utmost point ear and second utmost point ear are all not overlapping along the mirror image of first central line to the utmost point ear of being convenient for electric core when a plurality of electric cores assemble into battery module (be first utmost point ear and second utmost point ear) arrange, effectively avoid the utmost point ear mutual interference of electric core, need not to adjust the hookup location of electric core utmost point ear on the circuit board through extra adaptor, effective reduce cost and simplify assembly process.

Drawings

Fig. 1 is a schematic view of a first structure of a battery cell in an embodiment of the present application.

Fig. 2 is a schematic diagram of a second structure of a battery cell in an embodiment of the present application.

Fig. 3 is a schematic view of a mirror-image structure of a first tab in a battery cell along a first center line in an embodiment of the present application.

Fig. 4 is a first front view structural diagram of a battery module according to an embodiment of the present application.

Fig. 5 is a first schematic top view of a battery module according to an embodiment of the present disclosure.

Fig. 6 is a second front view schematically illustrating a battery module according to an embodiment of the present disclosure.

Fig. 7 is a second schematic top view illustrating a battery module according to an embodiment of the present disclosure.

Description of the main elements

Battery cells

100, 100a, 100b

Housing 10

First edge 11

First tab

20, 20a, 20b

Second tab

30, 30a, 30b

Mirror images

21, 31

Circuit board 40

First surface 41

Second surface 42

First center line L1

Second center line L2

Third centerline L3

Fourth centerline L4

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The embodiment of the application provides a battery module, and battery module includes the circuit board, and battery module still includes two at least foretell electric cores, and electric core piles up the setting, and the first utmost point ear and the second utmost point ear of one of them electric core are connected in the first surface of circuit board, and the first utmost point ear and the second utmost point ear in the electric core after another upset are connected in the second surface of circuit board, and the utmost point ear of two electric cores staggers the setting each other.

The embodiment of the application provides a battery module, and battery module includes the circuit board, and battery module still includes two at least foretell electric cores, and electric core sets up in the relative both sides of circuit board, and electric core is equipped with the one end of utmost point ear towards the circuit board, and first utmost point ear and second utmost point ear in two electric cores set up in proper order the interval.

In the electric core that this application embodiment provided, all do not overlap with first central line through first utmost point ear and second utmost point ear, first utmost point ear and second utmost point ear all do not overlap along the mirror image of first central line, in order to be convenient for the arrangement of the utmost point ear of electric core (first utmost point ear and second utmost point ear promptly) when a plurality of electric cores assemble into the battery module, effectively avoid the utmost point ear mutual interference of electric core, need not to adjust the hookup location of electric core utmost point ear on the circuit board through extra adaptor, effective reduce cost and simplify the assembly process.

Some embodiments will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, in an embodiment, a battery cell 100 includes a casing 10, a first tab 20, and a second tab 30. The first tab 20 and the second tab 30 extend out of the same end of the housing 10.

The width direction of the housing 10 is the first direction a, and the center line of the housing 10 in the first direction a is the first center line L1. The first tab 20 and the second tab 30 are not overlapped with the first central line L1, the first tab 20 is not overlapped with the second tab 30, and the mirror image 31 of the first tab 20 and the second tab 30 along the first central line is not overlapped, so that when a plurality of battery cells 100 are assembled into a battery module, the arrangement of the tabs of the battery cells 100 (namely the first tab 20 and the second tab 30) is facilitated, the mutual interference of the tabs of the battery cells 100 is effectively avoided, the connection position of the tabs of the battery cells 100 on a circuit board is not required to be adjusted through an additional adapter, the cost is effectively reduced, and the assembly process is simplified.

Specifically, the first tab 20 and the second tab 30 may be located on one side of the first center line L1, or the first tab 20 and the second tab 30 are respectively located on both sides of the first center line L1.

With continued reference to fig. 1, in some embodiments, the first tab 20 and the second tab 30 are located on one side of the first center line L1, and the first tab 20 and the second tab 30 do not overlap. When at least two electric cores 100 constitute the battery module in series connection or parallel connection, the utmost point ear of at least two electric cores 100 staggers each other and sets up and be located first central line L1 both sides respectively, effectively avoids electric core 100's utmost point ear mutual interference.

Referring to fig. 2, in some embodiments, the first tab 20 and the second tab 30 are respectively located at two sides of the first center line L1, and the mirror images 31 of the first tab 20 and the second tab 30 along the first center line L1 do not overlap. When at least two electric cores 100 constitute the battery module in series or parallel, the first tab 20 and the second tab 30 of at least two electric cores 100 are arranged at intervals in sequence, so as to effectively avoid mutual interference of the tabs of the electric cores 100.

Specifically, taking two battery cells 100 as an example, one of the battery cells is defined as a battery cell 100a, and the other is defined as a battery cell 100 b. The first tab 20b of the battery cell 100b is located between the gap between the first tab 20a and the second tab 30a of the battery cell 100a, and the second tab 30a of the battery cell 100a is located between the gap between the first tab 20b and the second tab 30b of the battery cell 100b (see fig. 4).

In the above-mentioned electric core 100, all do not overlap with first central line L1 through first utmost point ear 20 and second utmost point ear 30, first utmost point ear 20 all overlaps with second utmost point ear 30 and second utmost point ear 30 along the mirror image 31 of first central line, in order to be convenient for the arrangement of the utmost point ear of electric core 100 (being first utmost point ear 20 and second utmost point ear 30) when a plurality of electric cores 100 assemble into the battery module, effectively avoid the utmost point ear mutual interference of electric core 100, need not to adjust the hookup location of electric core 100 utmost point ear on the circuit board through extra adaptor, effective reduce cost and simplify assembly process.

Referring to fig. 1 and fig. 2, along the first direction a, the first tab 20 and the second tab 30 of the present embodiment have dimensions R1 and R2, respectively. The center lines of the first tab 20 and the second tab 30 in the first direction a are a second center line L2 and a third center line L3, respectively. The spacing D between the second centerline L2 and the third centerline L3 satisfies: d is not less than (R1+ R2)/2, so that a gap exists between the second central line L2 and the third central line L3, and mutual interference of lugs of the battery cell 100 is effectively avoided.

The dimension H of the housing 10 in the first direction a satisfies: h is more than or equal to 2(R1+ R2), so that the tabs of at least two battery cells 100 are arranged at the end part of the shell 10 of one battery cell 100 along the width direction, and the mutual interference of the tabs of the battery cells 100 is effectively avoided.

Referring to fig. 2 and fig. 3, a center line between the second center line L2 and the third center line L3 is a fourth center line L4, and a distance W between the fourth center line L4 and the first center line L1 satisfies: w > (R1+ R2)/4, so that a gap with a sufficient width is formed between the mirror image 21 of the first tab 20 along the first central line L1 and the second tab 30, and the mirror image 31 of the first tab 20 and the second tab 30 along the first central line L1 are not overlapped, thereby effectively avoiding mutual interference of the tabs of the battery cell.

The specific derivation process is as follows, and if the distance between the first tab 20 and the first center line L1 is defined as F1, and the distance between the second tab 30 and the first center line L1 is defined as F2, then W is (F1+ F2)/2-F2.

The distance between the mirror image 21 of the first tab 20 along the first center line L1 and the first center line L1 is F1, and the distance F3 between the mirror image 21 of the first tab 20 along the first center line L1 and the second tab 30 is F1-F2.

When W is decomposed (F1+ F2)/2-F2, (F1-F2)/2, F3 ═ F1-F2 ═ 2W.

Further by W > (R1+ R2)/4, a gap of at least the width of one tab is provided between the mirror image 21 of the first tab 20 along the first centerline L1 and the second tab 30. And then a gap with a width for accommodating at least one tab is formed between the mirror images 31 of the first tab 20 and the second tab 30 along the first central line L1, so that the first tab 20 and the second tab 30 are not overlapped along the mirror images 31 of the first central line L1, and mutual interference of the tabs of the battery cell 100 is effectively avoided.

In some embodiments, the edge of the housing 10 in the first direction a is the first edge 11, and the distance M between the first tab 20 and the second tab 30 and the first edge 11 satisfies: m is larger than or equal to 3mm, so that the first pole lug 20 and the second pole lug 30 are prevented from being too close to the edge to easily cause pole lug loss, and the sealing of the shell 10 is prevented from being influenced.

In some embodiments, the first tab 20 and the second tab 30 are located on opposite sides of the first centerline L1. The size H of the casing 10 along the first direction is 4(R1+ R2), so that a gap exists between the second center line L2 and the third center line L3, and mutual interference between the tabs of the battery cells 100 is effectively avoided. The distance W between the fourth center line L4 and the first center line L1 is (R1+ R2)/2, so that the gap between the mirror image 21 of the first tab 20 along the first center line L1 and the second tab 30 is at least 2W, and then a gap having a width of at least accommodating two tabs is formed between the mirror image 21 of the first tab 20 along the first center line L1 and the second tab 30, and further a gap having a width of at least accommodating two tabs is formed between the mirror image 31 of the first tab 20 and the second tab 30 along the first center line L1, so that the first tab 20 and the mirror image 31 of the second tab 30 along the first center line L1 are not overlapped, and mutual interference of the tabs of the battery cell is effectively avoided.

In some embodiments, the first tab 20 and the second tab 30 are located on the same plane, and the first tab 20 and the second tab 30 satisfy the above relationship. It is understood that, in other embodiments, the first tab 20 and the second tab 30 are located on different planes, and a plane perpendicular to the thickness direction of the battery cell 100 is set as a projection plane, and the projection of the projection plane of the first tab 20 and the second tab 30 in the thickness direction satisfies the above relationship.

Referring to fig. 4 and fig. 5, in some embodiments, the battery module 200 includes the circuit board 40, and the battery module 200 further includes two of the battery cells 100. Two battery cells 100 are stacked, and the large faces (i.e., the faces of the battery cells in the thickness direction) of the two battery cells 100 face opposite directions, wherein the first tab 20 and the second tab 30 of one battery cell 100 are connected to the first surface 41 of the circuit board 40, and the first tab 20 and the second tab 30 of the other battery cell 100 are connected to the second surface 42 of the circuit board 40.

The tabs of the two battery cells 100 are staggered from each other, so that the tabs of the two battery cells 100 are respectively located on two sides of the first central line L1, and the tabs of the battery cells 100 are effectively prevented from interfering with each other. And the connecting position of the pole ear of the battery cell 100 on the circuit board is not required to be adjusted through an additional adapter, so that the cost is effectively reduced, and the assembly process is simplified.

Specifically, taking two battery cells 100 as an example, one of the battery cells is defined as a battery cell 100a, and the other is defined as a battery cell 100 b. Since the

battery cells

100a and 100b are stacked, the casing 10 of the battery cell 100b in fig. 4 is shielded. The first tab 20a and the second tab 30a of the battery cell 100a are attached to the first surface 41 of the circuit board 40. The large surface of the battery cell 100b after the turning faces the opposite direction to the large surface of the battery cell 100 a. The first tab 20b and the second tab 30b of the battery cell 100b are attached to the second surface 42 of the circuit board 40. The tabs of the two battery cells 100 are staggered with each other, the first tab 20a and the second tab 30a of the battery cell 100a are located on one side of the first central line L1, and the first tab 20b and the second tab 30b of the battery cell 100b are located on one side of the first central line L1.

It is understood that the tabs of at least two battery cells 100 may also be simultaneously connected to the first surface 41 of the circuit board 40, or the tabs of at least two battery cells 100 may also be simultaneously connected to the second surface 42 of the circuit board 40.

In the battery module 200, the first tab 20 and the second tab 30 of one of the battery cells 100 are connected to the first surface 41 of the circuit board 40, and the first tab 20 and the second tab 30 of the other battery cell 100 are connected to the second surface 42 of the circuit board 40, so that the tabs of the two battery cells 100 are staggered, and the mutual interference of the tabs of the battery cells 100 is effectively avoided. And the connecting position of the pole ear of the battery cell 100 on the circuit board is not required to be adjusted through an additional adapter, so that the cost is effectively reduced, and the assembly process is simplified. And through the arrangement mode of the utmost point ear of above-mentioned electricity core 100, avoid using the great circuit board of width to effectively reduce battery module 200's volume, and improve battery module 200 capacity density.

Referring to fig. 6 and 7, in some embodiments, the battery module 200 includes the circuit board 40, and the battery module 200 further includes two of the battery cells 100. At least two battery cells 100 are disposed on opposite sides of the circuit board 40. The big faces of the two battery cells 100 face the same direction, the end of the battery cell 100 provided with the tab faces the circuit board, the first tab 20 and the second tab 30 in the two battery cells 100 are sequentially arranged at intervals, and the mutual interference of the tabs of the battery cells 100 is effectively avoided.

Specifically, taking two battery cells 100 as an example, one of the battery cells is defined as a battery cell 100a, and the other is defined as a battery cell 100 b. The first tab 20 of the battery cell 100b is located between the gap between the first tab 20 and the second tab 30 of the battery cell 100a, and the second tab 30 of the battery cell 100a is located between the gap between the first tab 20 and the second tab 30 of the battery cell 100 b.

In the above battery module 200, the first tab 20 and the second tab 30 in the two battery cells 100 are sequentially arranged at intervals, so that the mutual interference of the tabs of the battery cells 100 is effectively avoided. And the connecting position of the pole ear of the battery cell 100 on the circuit board is not required to be adjusted through an additional adapter, so that the cost is effectively reduced, and the assembly process is simplified. And through the arrangement mode of the utmost point ear of above-mentioned electricity core 100, avoid using the great circuit board of width to effectively reduce battery module 200's volume, and improve battery module 200 capacity density.

An embodiment of the present application further provides an electrical device (not shown), where the electrical device includes the battery module 200 in any of the above embodiments, and the battery module 200 is used to supply power to the electrical device.

In addition, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present application, and that suitable changes and modifications to the above embodiments are within the scope of the disclosure of the present application as long as they are within the true spirit and scope of the present application.

Claims

1. The utility model provides an electric core, includes casing, first utmost point ear and second utmost point ear, first utmost point ear with the second utmost point ear stretches out same one end of casing, its characterized in that:

the width direction of the shell is a first direction, and the center line of the shell in the first direction is a first center line;

the first tab and the second tab are not overlapped with the first central line, the first tab is not overlapped with the second tab, and the first tab and the second tab are not overlapped with the mirror image of the first central line.

2. The cell of claim 1, wherein: along the first direction, the first utmost point ear with the size of second utmost point ear is R1 and R2 respectively, the first utmost point ear with the second utmost point ear is in the central line in first direction is second central line and third central line respectively, the second central line with interval D between the third central line satisfies: d is not less than (R1+ R2)/2.

3. The cell of claim 2, wherein: the dimension H of the shell along the first direction satisfies: h is more than or equal to 2(R1+ R2).

4. The cell of claim 2, wherein: a center line between the second center line and the third center line is a fourth center line, and a distance W between the fourth center line and the first center line satisfies: w > (R1+ R2)/4.

5. The cell of claim 1, wherein: the edge of the shell in the first direction is a first edge, and the distance M between the first lug and the first edge and the distance M between the second lug and the first edge satisfy the following conditions: m is more than or equal to 3 mm.

6. The cell of claim 4, wherein: the first tab and the second tab are located on opposite sides of the first centerline.

7. The cell of claim 6, wherein: a dimension H of the housing in the first direction is 4(R1+ R2), and a distance W between the fourth center line and the first center line is (R1+ R2)/2.

8. The utility model provides a battery module, battery module includes the circuit board, its characterized in that: the battery module further comprises two battery cells as set forth in any one of claims 1 to 7, the two battery cells are stacked, the large faces of the two battery cells face in opposite directions, wherein the first tab and the second tab of one battery cell are connected to the first surface of the circuit board, and the first tab and the second tab of the other battery cell are connected to the second surface of the circuit board.

9. The utility model provides a battery module, battery module includes the circuit board, its characterized in that: the battery module further comprises two battery cells according to any one of claims 1 to 7, the two battery cells are arranged on two opposite sides of the circuit board, the large faces of the two battery cells face the same direction, one ends of the battery cells provided with the tabs face the circuit board, and a first tab and a second tab of the two battery cells are arranged at intervals in sequence.

10. An electrical device, characterized in that: the electric device comprises the battery module according to claim 8 or 9, and the battery module is used for supplying power to the electric device.