CN214313299U

CN214313299U - Battery and electric equipment comprising same

Info

Publication number: CN214313299U
Application number: CN202120591277.1U
Authority: CN
Inventors: 袁秀兰
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-09-28
Anticipated expiration: 2031-03-23

Abstract

The application provides a battery and consumer, the battery includes parallel connection's first electric core and second electric core, the first positive pole utmost point ear and the first negative pole utmost point ear of first electric core are located the outermost lane of first positive pole piece and first negative pole piece respectively, the second positive pole utmost point ear and the second negative pole utmost point ear of second electric core are located the outermost circle of second positive pole piece and second negative pole piece respectively, first electric core with the pole piece polarity on the relative surface of second electric core is the same. The first positive electrode lug and the second positive electrode lug are approximately in mirror symmetry, and the first negative electrode lug and the second negative electrode lug are approximately in mirror symmetry. When the electrode lugs with the same polarity are subjected to transfer welding, only the empty foil area of the outermost ring is arranged between the electrode lugs, and the empty foil area corresponding to the electrode lugs is subjected to insulation protection, so that short circuit between a transfer welding position and a pole piece can be avoided, the difficulty of insulation protection of narrow and small battery cells is reduced, and the method is strong in operability and simple in process.

Description

Battery and electric equipment comprising same

Technical Field

The application relates to a battery and electric equipment comprising the battery.

Background

When preparing the lithium ion battery cell of utmost point narrow, because the internal perimeter of rolling up the needle is little, greatly promoted the processing degree of difficulty. If divide into two electric cores to inside electric core parallelly connected, it can be processed easily to roll up the needle, nevertheless because electric core is narrow, when doing two electric core parallel connection, can't do the insulation to utmost point ear department, has the risk that leads to utmost point ear and active substance layer to take place the short circuit, causes the quality problem.

The two existing electric cores are combined in a structure, and the two electric cores are identical. When piling up along electric core thickness direction, the anodal utmost point ear of one of them electric core corresponds the anodal utmost point ear of another electric core, and the negative pole utmost point ear corresponds the negative pole utmost point ear of another electric core. When two positive electrode tabs are subjected to transfer welding, the positive electrode tabs have the possibility of contacting a negative electrode plate, and similarly, the negative electrode tabs also have the possibility of contacting the positive electrode plate, so that the positive electrode tabs and the negative electrode tabs of the battery cell need to be subjected to insulation protection, for example, U-shaped adhesive tape is adhered to the longitudinal electrode plate at the electrode tab position of the battery cell on one side of the transfer welding for protection. The manual work of U type glue is pasted, and the operation is inconvenient to the less electric core of width, it is bigger to carry out the degree of difficulty of insulating protection, the operation difficulty.

SUMMERY OF THE UTILITY MODEL

In view of this, this application aims at providing a battery in order to solve among the prior art the great problem of the degree of difficulty that the narrow electric core carries out insulation protection to utmost point ear.

In order to solve the above problem, the technical solution of an embodiment of the present application is: the utility model provides a battery, the battery includes parallel connection's first electric core and second electric core, first electric core is piled up in proper order through first positive pole piece, first diaphragm and first negative pole piece and is convoluteed and form, the second electric core is piled up in proper order through second positive pole piece, second diaphragm and second negative pole piece and is convoluteed and form. The first battery cell and the second battery cell are stacked in the thickness direction of the battery, the first battery cell comprises a first positive electrode lug and a first negative electrode lug, the first positive electrode lug is located at the outermost ring of the first positive electrode piece, and the first negative electrode lug is located at the outermost ring of the first negative electrode piece. The second battery cell comprises a second positive pole lug and a second negative pole lug, the second positive pole lug is located in the outermost ring of the second positive pole piece, and the second negative pole lug is located in the outermost ring of the second negative pole piece. The polarity of the pole pieces on the surfaces of the first battery cell and the second battery cell opposite to each other is the same.

In one embodiment, the first positive electrode sheet comprises a first positive current collector, the first positive current collector comprises a first positive electrode empty foil area without a first positive electrode active material layer, and the first positive electrode tab is disposed in the first positive electrode empty foil area. First negative pole piece includes the first negative pole mass flow body, the first negative pole mass flow body includes the empty paper tinsel district of first negative pole of uncoated first negative pole active material layer, first negative pole utmost point ear sets up the empty paper tinsel district of first negative pole. The second positive pole piece includes the second positive current collector, the second positive current collector includes the second anodal empty paper tinsel district of uncoated second positive active substance layer, the setting of second positive pole utmost point ear is in the second anodal empty paper tinsel district. The second negative pole piece includes the second negative pole mass flow body, the second negative pole mass flow body includes the empty paper tinsel district of second negative pole of uncoated second negative pole active substance layer, the second negative pole utmost point ear sets up the empty paper tinsel district of second negative pole.

First electric core and second electricity core pile up the setting in the thickness direction, and the pole piece polarity on relative surface is the same, sets up to be roughly mirror symmetry in the first anodal utmost point ear and the anodal utmost point ear of second in outer lane, and is the same, sets up to be roughly mirror symmetry in the first negative pole utmost point ear and the second negative pole utmost point ear in outer lane. When the electrode lugs with the same polarity are subjected to transfer welding, only the empty foil area of the outermost ring is arranged between the electrode lugs, and the empty foil area corresponding to the electrode lugs is subjected to insulation protection, so that short circuit between a transfer welding position and a pole piece can be avoided, the difficulty of insulation protection of narrow and small battery cells is reduced, and the method is strong in operability and simple in process.

In one embodiment, the winding direction of the first battery cell is the same as the winding direction of the second battery cell.

In one embodiment, the winding direction of the first cell is opposite to the winding direction of the second cell.

In one embodiment, the width of the first cell is less than or equal to the width of the second cell in the width direction of the battery; and/or, in the length direction of the battery, the length of the first battery cell is less than or equal to the length of the second battery cell; and/or the thickness of the first battery cell is smaller than or equal to the thickness of the second battery cell in the thickness direction of the battery.

In one embodiment, the outermost ring of the first electrical core is the first positive electrode plate, a first insulating layer is disposed at a position, opposite to the first positive electrode tab, of a first negative electrode empty foil area of the outermost ring of the first negative electrode plate, and a second insulating layer is disposed at a position, opposite to the first negative electrode tab, of the first positive electrode empty foil area of the outermost ring of the first positive electrode plate; and/or the outermost ring of the second battery cell is the second positive pole piece, the first insulating layer is arranged at the position, opposite to the second positive pole lug, of the second negative pole empty foil area at the outermost ring of the second negative pole piece, and the second insulating layer is arranged at the position, opposite to the second negative pole lug, of the second positive pole empty foil area at the outermost ring of the second positive pole piece.

In one embodiment, a distance between the first anode tab and a winding start end of the first anode active material layer is greater than a distance between the second anode tab and a winding start end of the second anode active material layer in a width direction of the battery; and/or the distance between the first positive electrode tab and the winding starting end of the first negative electrode active material layer is smaller than the distance between the second positive electrode tab and the winding starting end of the second negative electrode active material layer.

In one embodiment, a distance between the first anode tab and a winding start end of the first cathode active material layer is greater than a distance between the second anode tab and a winding start end of the second cathode active material layer in a width direction of the battery; and/or the distance between the first positive electrode lug and the winding starting end of the first positive electrode active material layer is smaller than the distance between the second positive electrode lug and the winding starting end of the second positive electrode active material layer.

In one embodiment, a third insulating layer is attached to the first positive electrode empty foil region beyond the ending end of the first negative electrode active material layer and/or the ending end of the first negative electrode empty foil region along the winding direction of the first battery cell; and/or the third insulating layer is attached to the second positive electrode empty foil area which exceeds the tail end of the second negative electrode active material layer and/or the tail end of the second negative electrode empty foil area along the winding direction of the second battery cell.

According to one embodiment of the present application, the battery may have an optional width of 5-10mm and an optional thickness of 4-8 mm.

According to one embodiment of the present application, the battery has a width of 8mm and a thickness of 6 mm.

Another embodiment of the present application further provides a powered device, which includes any one of the batteries described above.

The embodiment of the application provides a battery and consumer, the battery includes parallel connection's first electric core and second electric core, first electric core with the second electric core is piled up the setting along the thickness direction, and the pole piece polarity on relative surface is the same, sets up to be mirror symmetry in the first positive pole utmost point ear and the second positive pole utmost point ear of outer lane roughly, sets up to be mirror symmetry in the first negative pole utmost point ear and the second negative pole utmost point ear of outer lane roughly. When the electrode lugs with the same polarity are subjected to transfer welding, only the empty foil area of the outermost ring is arranged between the electrode lugs, and the short circuit between the transfer welding position and the electrode plate can be avoided only by performing insulation protection on the corresponding empty foil area, so that the difficulty of insulation protection of narrow and small battery cells is reduced, and the method is strong in operability and simple in process.

Drawings

The present application will be described in further detail with reference to the following drawings and detailed description.

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a battery according to another embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a battery according to another embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram of a first positive electrode tab according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of a first negative electrode tab according to an embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of a second positive electrode tab according to an embodiment of the present disclosure.

Fig. 7 is a schematic structural diagram of a second negative electrode tab according to an embodiment of the present disclosure.

Fig. 8 is a schematic structural diagram of a battery according to another embodiment of the present disclosure.

Fig. 9 is a schematic view of tab transfer welding according to an embodiment of the present application.

Fig. 10 is a schematic view of a tab transfer weld provided in another embodiment of the present application.

Description of the main element symbols:

battery 10

Positive electrode 11

Negative electrode 12

Tab glue 13

Terminal 14

First battery cell 100

Second cell 300

First positive electrode tab 101

First diaphragm 102

First negative electrode tab 103

First positive electrode tab 104

First negative electrode tab 105

First insulating layer 106

Second insulating layer 107

Third insulating layer 108

Second positive electrode tab 301

Second diaphragm 302

Second negative electrode piece 303

Second positive electrode tab 304

Second negative electrode tab 305

First positive current collector 1011

First positive electrode active material layer 1012

First positive electrode dummy foil region 1013

First negative current collector 1031

First anode active material layer 1032

First negative empty foil region 1033

Second positive current collector 3011

Second positive electrode active material layer 3012

Second positive electrode dummy foil region 3013

Second negative current collector 3031

Second anode active material layer 3032

Second negative empty foil region 3033

Thickness direction X

Width direction Y

Length direction Z

The following detailed description will further describe embodiments of the present application in conjunction with the above-described figures.

Detailed Description

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 the embodiments of this application belong. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application.

Referring to fig. 1 to 3, an embodiment of the present application provides a battery 10, where the battery 10 includes a first battery cell 100 and a second battery cell 300 connected in parallel, the first battery cell 100 is formed by sequentially stacking and winding a first positive electrode tab 101, a first separator 102, and a first negative electrode tab 103, and the second battery cell 300 is formed by sequentially stacking and winding a second positive electrode tab 301, a second separator 302, and a second negative electrode tab 303. The first battery cell 100 and the second battery cell 300 are stacked in the thickness direction X of the battery 10, the first battery cell 100 includes a first positive electrode tab 104 and a first negative electrode tab 105, the first positive electrode tab 104 is located at the outermost ring of the first positive electrode tab 101, and the first negative electrode tab 105 is located at the outermost ring of the first negative electrode tab 103. The second battery cell 300 includes a second positive electrode tab 304 and a second negative electrode tab 305, where the second positive electrode tab 304 is located at the outermost ring of the second positive electrode tab 301, and the second negative electrode tab 305 is located at the outermost ring of the second negative electrode tab 303. The polarity of the pole pieces on the opposite surfaces of the first battery cell 100 and the second battery cell 300 is the same.

Referring to fig. 4, the first positive electrode tab 101 includes a first positive electrode current collector 1011, the first positive electrode current collector 1011 includes a first positive electrode empty foil area 1013 without a first positive electrode active material layer 1012, and the first positive electrode tab 104 is disposed in the first positive electrode empty foil area 1013.

Referring to fig. 5, the first negative electrode tab 103 includes a first negative electrode current collector 1031, the first negative electrode current collector 1031 includes a first negative electrode empty foil region 1033 not coated with the first negative electrode active material layer 1032, and the first negative electrode tab 105 is disposed in the first negative electrode empty foil region 1033.

Referring to fig. 6, the second positive electrode tab 301 includes a second positive electrode current collector 3011, the second positive electrode current collector 3011 includes a second positive electrode empty foil area 3013 without a second positive electrode active material layer 3012, and the second positive electrode tab 304 is disposed in the second positive electrode empty foil area 3013.

Referring to fig. 7, the second negative electrode tab 303 includes a second negative electrode current collector 3031, the second negative electrode current collector 3031 includes a second negative electrode empty foil area 3033 not coated with a second negative electrode active material layer 3032, and the second negative electrode tab 305 is disposed in the second negative electrode empty foil area 3033.

Referring to fig. 1 to 7, the outermost circle of the first battery cell 100 is the first positive electrode tab 101, a first insulating layer 106 is disposed at a position, opposite to the first positive electrode tab 104, of the first negative electrode empty foil area 1033 of the outermost circle of the first negative electrode tab 103, and a second insulating layer 107 is disposed at a position, opposite to the first negative electrode tab 105, of the first positive electrode empty foil area 1013 of the outermost circle of the first positive electrode tab 101. The outermost circle of the second battery cell 300 is the second positive pole piece 301, and the poles on the surfaces of the first battery cell 100 opposite to the second battery cell 300 have the same polarity, and are both positive pole pieces. It is understood that the surfaces of the first battery cell 100 opposite to the second battery cell 300 may also be both negative electrode plates. The first insulating layer 106 is disposed at a position where the second negative electrode empty foil region 3033 at the outermost ring of the second negative electrode tab 303 is opposite to the second positive electrode tab 304, and the second insulating layer 107 is disposed at a position where the second positive electrode empty foil region 3013 at the outermost ring of the second positive electrode tab 301 is opposite to the second negative electrode tab 305. In some embodiments, the first insulating layer 106 and the second insulating layer are PCL (polycaprolactone) adhesive paper, and it is understood that the first insulating layer 106 and the second insulating layer may also be other materials having an insulating function.

The first battery cell 100 and the second battery cell 300 are stacked in the thickness direction X, the pole piece polarities of the opposite surfaces are the same, the first positive pole tab 104 and the second positive pole tab 304 disposed at the outermost rings are substantially mirror-symmetrical in the width direction, and similarly, the first negative pole tab 105 and the second negative pole tab 305 disposed at the outermost rings are substantially mirror-symmetrical in the width direction. When the electrode lugs with the same polarity are subjected to transfer welding, only the empty foil area of the outermost ring is arranged between the electrode lugs, and the short circuit between the transfer welding position and the electrode plate can be avoided only by performing insulation protection on the corresponding empty foil area, so that the difficulty of insulation protection of narrow and small battery cells is reduced, and the method is strong in operability and simple in process.

Further, the width of the first insulating layer 106 is greater than the width of the first positive electrode tab 104 along the width direction Y to prevent the first positive electrode tab 104 from contacting the first negative electrode tab 103; the width of the first insulating layer 106 is greater than the width of the second positive electrode tab 304 to prevent the second positive electrode tab 304 from contacting the second negative electrode tab 303. The width of the second insulating layer 107 is greater than the width of the first negative electrode tab 105 along the width direction Y to prevent the first negative electrode tab 105 from contacting the first positive electrode tab 101; the width of the second insulating layer 107 is greater than the width of the second negative electrode tab 305, so as to prevent the second negative electrode tab 305 from contacting the second positive electrode tab 301.

Further, a direction perpendicular to a plane formed by the thickness direction X and the width direction Y is defined as a length direction Z of the battery (see fig. 9). Along the length direction Z, the length of the first insulating layer 106 exceeding the first negative electrode tab 103 is 0-5 mm to prevent the first positive electrode tab 104 from contacting the first negative electrode tab 103. Along the length direction Z, the length of the first insulating layer 106 beyond the second negative electrode tab 303 is 0-5 mm, so as to prevent the second positive electrode tab 304 from contacting the second negative electrode tab 303. Along length direction Z, second insulating layer 107 surpasss first positive pole piece 101's length is 0 ~ 5mm to prevent first negative pole utmost point ear 105 with first positive pole piece 101 contact. Along length direction Z, second insulating layer 107 surpasss the length of second positive pole piece 301 is 0 ~ 5mm to prevent second negative pole utmost point ear 305 with the contact of second positive pole piece 301.

Further, as shown in fig. 1 to 3, the second insulating layer 107 may be disposed in a position where the first negative empty foil region 1033 corresponds to the first negative tab 105, and the second insulating layer 107 may also be disposed in a position where the second negative empty foil region 3033 corresponds to the second negative tab 305, so as to further ensure an insulation protection effect.

In some embodiments, the winding direction of the first battery cell 100 is opposite to the winding direction of the second battery cell 300 (as shown in fig. 1). In other embodiments, the winding direction of the first battery cell 100 and the winding direction of the second battery cell 300 may also be the same (as shown in fig. 2). According to an embodiment of the present application, the winding direction may be clockwise winding or counterclockwise winding.

As shown in fig. 1 to 3, in the width direction Y of the battery, the width of the first battery cell 100 is less than or equal to the width of the second battery cell 300; in the length direction of the battery, the length of the first battery cell 100 is less than or equal to the length of the second battery cell 300; in the thickness direction of the battery, the thickness of the first battery cell 100 is less than or equal to the thickness of the second battery cell 300.

As shown in fig. 3, in the width direction Y of the battery, the distance between the first anode tab 105 and the winding start end of the first anode active material layer 1032 is greater than the distance between the second anode tab 305 and the winding start end of the second anode active material layer 3032; the distance between the first positive electrode tab 104 and the winding start end of the first negative electrode active material layer 1032 is smaller than the distance between the second positive electrode tab 304 and the winding start end of the second negative electrode active material layer 3032.

As shown in fig. 3, in the width direction Y of the battery, the distance between the first anode tab 105 and the winding start end of the first cathode active material layer 1012 is greater than the distance between the second anode tab 305 and the winding start end of the second cathode active material layer 3012; the distance between the first positive electrode tab 104 and the winding start end of the first positive electrode active material layer 1012 is smaller than the distance between the second positive electrode tab 304 and the winding start end of the second positive electrode active material layer 3012.

Further, the insulating layer may be continuously disposed in most of the area of the empty foil region, in addition to being disposed only in the empty foil region corresponding to the tab. Referring to fig. 8, a third insulating layer 108 is attached to the first positive electrode empty foil region 1013 beyond the ending portion of the first negative electrode active material layer 1032 and/or the ending portion of the first negative electrode empty foil region 1033 along the winding direction of the first battery cell 100; the third insulating layer 108 is attached to the second positive electrode empty foil region 3013 which exceeds the trailing end of the second negative electrode active material layer 3032 and/or the trailing end of the second negative electrode empty foil region 3033 along the winding direction of the second battery cell 300. The third insulating layer 108 is PCL (polycaprolactone) adhesive paper, and it can be understood that the third insulating layer 108 may also be other materials having an insulating effect. Fig. 8 shows a case where the two battery cells in fig. 1 are continuously pasted with the third insulating layer 108 in most areas of the first positive electrode empty foil area 1013 and the second positive electrode empty foil area 3013, respectively, and it is understood that the battery cells in fig. 2 and 3 may also be continuously pasted with the third insulating layer 108 in most areas of the first positive electrode empty foil area 1013 and the second positive electrode empty foil area 3013, respectively.

The positive electrode 11 of the battery 10 is formed by welding the first positive electrode tab 104 and the second positive electrode tab 304, and the negative electrode 12 of the battery 10 is formed by welding the first negative electrode tab 105 and the second negative electrode tab 305. Referring to fig. 9, the first positive electrode tab 104, the first negative electrode tab 105, the second positive electrode tab 304 and the second negative electrode tab 305 are all without tab glue 13, and are led out of the positive electrode 11 and the negative electrode 12 of the battery 10 through the lead-out end 14 with the tab glue 13. Referring to fig. 10, the second positive electrode tab 304 and the second negative electrode tab 305 are provided with the tab glue 13, and the first positive electrode tab 104 and the first negative electrode tab 105 are not provided with the tab glue 13, so that the first positive electrode tab 104 and the first negative electrode tab 105 without the tab glue 13 are directly welded to the second positive electrode tab 304 and the second negative electrode tab 305 with the tab glue 13, respectively, to extract the positive electrode 11 and the negative electrode 12 of the battery 10. It is to be understood that if the first positive electrode tab 104 and the first negative electrode tab 105 are provided with the tab paste 13 and the second positive electrode tab 304 and the second negative electrode tab 305 are not provided with the tab paste 13, the second positive electrode tab 304 and the second negative electrode tab 305 are directly welded to the first positive electrode tab 104 and the first negative electrode tab 105, respectively, to lead out the positive electrode 11 and the negative electrode 12 of the battery 10.

The embodiment of the application provides a battery 10 and electric equipment, battery 10 includes parallel connection's first electric core 100 and second electric core 300, first electric core 100 with second electric core 300 piles up the setting along thickness direction X, and the pole piece polarity on relative surface is the same, sets up to be roughly mirror symmetry in first positive pole utmost point ear 104 and the second positive pole utmost point ear 304 of outermost lane, sets up to be roughly mirror symmetry in first negative pole utmost point ear 105 and the second negative pole utmost point ear 305 of outermost lane. When the electrode lugs with the same polarity are subjected to transfer welding, only the empty foil area of the outermost ring is arranged between the electrode lugs, and the empty foil area corresponding to the electrode lugs is subjected to insulation protection, so that short circuit between a transfer welding position and a pole piece can be avoided, the difficulty of insulation protection of narrow and small battery cells is reduced, and the method is strong in operability and simple in process.

Claims

1. A battery comprises a first battery cell and a second battery cell which are connected in parallel, wherein the first battery cell is formed by sequentially stacking and winding a first positive pole piece, a first diaphragm and a first negative pole piece, and the second battery cell is formed by sequentially stacking and winding a second positive pole piece, a second diaphragm and a second negative pole piece; it is characterized in that the preparation method is characterized in that,

the first battery cell and the second battery cell are stacked along the thickness direction of the battery, the first battery cell comprises a first positive electrode tab and a first negative electrode tab, the first positive electrode tab is positioned at the outermost ring of the first positive electrode piece, and the first negative electrode tab is positioned at the outermost ring of the first negative electrode piece;

the second battery cell comprises a second positive electrode tab and a second negative electrode tab, the second positive electrode tab is positioned at the outermost ring of the second positive electrode piece, and the second negative electrode tab is positioned at the outermost ring of the second negative electrode piece;

the polarity of the pole pieces on the surfaces of the first battery cell and the second battery cell opposite to each other is the same.

2. The battery of claim 1, wherein a winding direction of the first cell is the same as a winding direction of the second cell.

3. The battery of claim 1, wherein a winding direction of the first cell is opposite a winding direction of the second cell.

4. The battery of claim 1, wherein a width of the first cell is less than or equal to a width of the second cell in a width direction of the battery; and/or, in the length direction of the battery, the length of the first battery cell is less than or equal to the length of the second battery cell; and/or the thickness of the first battery cell is smaller than or equal to the thickness of the second battery cell in the thickness direction of the battery.

5. The battery of claim 1,

the first positive pole piece comprises a first positive pole current collector, the first positive pole current collector comprises a first positive pole empty foil area which is not coated with a first positive pole active substance layer, and a first positive pole lug is arranged in the first positive pole empty foil area;

the first negative pole piece comprises a first negative pole current collector, the first negative pole current collector comprises a first negative pole empty foil area which is not coated with a first negative pole active material layer, and a first negative pole lug is arranged in the first negative pole empty foil area;

the second positive pole piece comprises a second positive pole current collector, the second positive pole current collector comprises a second positive pole empty foil area which is not coated with a second positive pole active substance layer, and a second positive pole lug is arranged in the second positive pole empty foil area; and

the second negative pole piece includes the second negative pole mass flow body, the second negative pole mass flow body includes the empty paper tinsel district of second negative pole of uncoated second negative pole active substance layer, the second negative pole utmost point ear sets up the empty paper tinsel district of second negative pole.

6. The battery of claim 5, wherein the outermost ring of the first cell is the first positive electrode tab, a first insulating layer is disposed at a position, opposite to the first positive electrode tab, of a first negative electrode empty foil area of the outermost ring of the first negative electrode tab, and a second insulating layer is disposed at a position, opposite to the first negative electrode tab, of the first positive electrode empty foil area of the outermost ring of the first positive electrode tab; and/or the outermost ring of the second battery cell is the second positive pole piece, the first insulating layer is arranged at the position, opposite to the second positive pole lug, of the second negative pole empty foil area at the outermost ring of the second negative pole piece, and the second insulating layer is arranged at the position, opposite to the second negative pole lug, of the second positive pole empty foil area at the outermost ring of the second positive pole piece.

7. The battery according to claim 5, wherein a distance between the first anode tab and a winding start end of the first anode active material layer is larger than a distance between the second anode tab and a winding start end of the second anode active material layer in a width direction of the battery; and/or the distance between the first positive electrode tab and the winding starting end of the first negative electrode active material layer is smaller than the distance between the second positive electrode tab and the winding starting end of the second negative electrode active material layer.

8. The battery according to claim 5, wherein a distance between the first negative electrode tab and a winding-starting end of the first positive electrode active material layer is larger than a distance between the second negative electrode tab and a winding-starting end of the second positive electrode active material layer in a width direction of the battery; and/or the distance between the first positive electrode lug and the winding starting end of the first positive electrode active material layer is smaller than the distance between the second positive electrode lug and the winding starting end of the second positive electrode active material layer.

9. The battery of claim 5, wherein a third insulating layer is attached to the first positive electrode empty foil region beyond the ending end of the first negative electrode active material layer and/or the ending end of the first negative electrode empty foil region in the winding direction of the first cell; and/or the third insulating layer is attached to the second positive electrode empty foil area which exceeds the tail end of the second negative electrode active material layer and/or the tail end of the second negative electrode empty foil area along the winding direction of the second battery cell.

10. An electrical consumer, characterized in that it comprises a battery according to any one of claims 1-9.