Battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery which comprises two single battery cells and a cover plate assembly, each single battery cell is provided with a first positive electrode lug part, a second positive electrode lug part, a first negative electrode lug part and a second negative electrode lug part which are arranged at intervals, the connecting ends of the first positive pole lug part and the first negative pole lug part and the pole piece are arranged close to the outer edge of the single cell, and the connecting ends of the second positive pole lug part and the second negative pole lug part and the pole piece are arranged close to the center of the single cell; the cover plate assembly is provided with a positive electrode welding area and a negative electrode welding area. The first positive pole lug part and the second positive pole lug part of each single cell are connected with the positive pole welding area in a welding manner to form two positive pole welding marks which are arranged at an interval, and the first negative pole lug part and the second negative pole lug part of each single cell are connected with the negative pole welding area in a welding manner to form two negative pole welding marks which are arranged at an interval. The battery is simple in structure, convenient to assemble and high in overcurrent capacity.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery. BACKGROUND

[0002] With the continuous improvement of lithium ion battery energy density, and the battery pack system development speed accelerates, the fast charging ability requirement of battery is higher and higher, at the same time, the overcurrent capacity in the battery is also urgently needed to improve.

[0003] Therefore, it is currently an urgent technical problem to be solved to increase the overcurrent capacity while ensuring the operability of the process. INVENTION CONTENTS

[0004] The utility model discloses a kind of batteries, the structure of the battery is simple, easy to assemble and has greater overcurrent capacity.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a kind of batteries, comprising: two single batteries, each the single battery has the first positive lug, the second positive lug, the first negative lug and the second negative lug of interval arrangement, the first positive lug and the first negative lug are close to the outer edge of the single battery with the connecting end of pole piece, the second positive lug and the second negative lug are close to the center of the single battery with the connecting end of pole piece;Cover plate assembly, the cover plate assembly is equipped with positive welding area and negative welding area;Wherein: the first positive lug and the second positive lug of each the single battery are connected with the positive welding area and are welded, and form two interval arrangement positive welding, the first negative lug and the second negative lug of each the single battery are connected with the negative welding area and are welded, and form two interval arrangement

[0007] The battery of the utility model has the beneficial effects: in actual manufacturing process, the positive pole piece with the first positive lug and the second positive lug, insulating diaphragm and the negative pole piece with the first negative lug and the second negative lug are stacked, and then single battery is manufactured by winding and a series of processes, the structure of this single battery is simple, and manufacturing is more convenient.In the assembly process, after two single batteries are stacked, two first positive lug, two second positive lug, two first negative lug and two second negative lug are welded to the positive welding area and the negative welding area of cover plate assembly respectively, form four positive welding and four negative welding, so not only can improve the connection firmness degree of single battery and cover plate assembly, but also can increase the welding area of cover plate assembly, thereby increase overcurrent capacity.

[0008] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a structure schematic view of two single battery cells of the embodiment one of the present application;

[0010] Figure 2 is a welding schematic view of two single battery cells and a top cover of the embodiment one of the present application;

[0011] Figure 3 is an unfolded structure schematic view of one single battery cell of the embodiment one of the present application;

[0012] Figure 4 is an unfolded structure schematic view of another single battery cell of the embodiment one of the present application.

[0013] Figure 5 is a structure schematic view of two single battery cells of the embodiment two of the present application;

[0014] Figure 6 is a welding schematic view of two single battery cells and a top cover of the embodiment two of the present application;

[0015] Figure 7 is an unfolded structure schematic view of two single battery cells of the embodiment two of the present application;Reference signs:

[0016] 100, single battery cell;110, first positive electrode lug;120, second positive electrode lug;130, first negative electrode lug;140, second negative electrode lug;101, positive electrode welding mark;102, negative electrode welding mark;200, cover plate assembly;210, positive electrode welding area;220, negative electrode welding area. DETAILED DESCRIPTION

[0017] The present application will be described in further detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, rather than all the structures.

[0018] In the description of the utility model, unless another definite provision and limit, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relation.For ordinary skilled person in the art, the above-mentioned term can be understood in the specific meaning in the utility model according to specific circumstances.

[0019] In the description of the embodiment, the orientation or position relationship of the terms "upper", "lower", "right", etc.is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0020] The utility model discloses a kind of batteries, such as Figure 2 And Figure 6 As shown in, battery includes two single batteries 100 and cover plate assembly 200, refer to Figure 1 And Figure 5As shown, each single battery cell 100 has a first positive tab 110, a second positive tab 120, a first negative tab 130 and a second negative tab 140 arranged at intervals, the first positive tab 110 and the first negative tab 130 are arranged close to the outer edge of the single battery cell 100 with the connecting end of the pole piece, the second positive tab 120 and the second negative tab 140 are arranged close to the center of the single battery cell 100 with the connecting end of the pole piece, and the cover plate assembly 200 is provided with a positive welding area 210 and a negative welding area 220. The first positive tab 110 and the second positive tab 120 of each single battery cell 100 are welded to the positive welding area 210 and form two positive welding pads 101 arranged at intervals, and the first negative tab 130 and the second negative tab 140 of each single battery cell 100 are welded to the negative welding area 220 and form two negative welding pads 102 arranged at intervals. It can be understood that in the actual manufacturing process, the single battery cell 100 is manufactured by winding and a series of processes after the positive pole piece with the first positive tab 110 and the second positive tab 120, the insulating diaphragm and the negative pole piece with the first negative tab 130 and the second negative tab 140 are laminated. This single battery cell 100 has a simple structure and is convenient to manufacture. In the assembly process, after stacking two single battery cells 100, two first positive tabs 110, two second positive tabs 120, two first negative tabs 130 and two second negative tabs 140 are welded to the positive welding area 210 and the negative welding area 220 of the cover plate assembly 200 respectively, forming four positive welding pads 101 and four negative welding pads 102. This not only can improve the connection firmness of the single battery cell 100 and the cover plate assembly 200, but also can increase the welding area of the cover plate assembly 200, thereby increasing the overcurrent capacity.

[0021] It should be noted that in the present application, the positive welding area 210 and the negative welding area 220 can be composed of positive and negative adapter plates on the cover plate assembly 200, or can be composed of positive and negative columns, and the positive welding area 210 and the negative welding area 220 formed on the cover plate assembly 200 are prior art, which will not be described in detail.

[0022] It should be noted that the single battery cell 100 usually includes a plurality of laminated pole pieces, and the first positive tab 110 described above refers to the first positive tab 110 of the entire single battery cell 100 after the lamination of the first positive tabs of the plurality of pole pieces, that is, the first positive tab 110 is a multi-layer structure. The second positive tab 120, the first negative tab 130 and the second negative tab 140 are also multi-layer structures.

[0023] In addition, the single battery cell 100 of the present embodiment can be a wound battery cell or a laminated battery cell, and the specific type can be selected according to actual needs.

[0024] In the embodiment of the utility model, the arrangement mode of the first positive electrode lug 110, the second positive electrode lug 120, the first negative electrode lug 130 and the second negative electrode lug 140 of two single battery cells 100 can be adjusted according to actual needs, and the following two specific arrangement modes are described.

[0025] Embodiment one:

[0026] The interval between the first positive electrode lug 110 and the first negative electrode lug 130 of one single battery cell 100 is greater than the interval between the second positive electrode lug 120 and the second negative electrode lug 140 of one single battery cell 100. Figure 3 The interval between the first positive electrode lug 110 and the first negative electrode lug 130 of the other single battery cell 100 is less than the interval between the second positive electrode lug 120 and the second negative electrode lug 140 of the other single battery cell 100. Figure 4 As shown in FIG. 1, the first positive electrode lug 110 of one single battery cell 100 is arranged correspondingly with the second positive electrode lug 120 of the other single battery cell 100, and the first negative electrode lug 130 of one single battery cell 100 is arranged correspondingly with the second negative electrode lug 140 of the other single battery cell 100. Figure 2 It can be understood that, in the actual welding process, the longer first positive electrode lug 110 of one single battery cell 100 is welded correspondingly with the shorter second positive electrode lug 120 of the other single battery cell 100, and the longer first negative electrode lug 130 of one single battery cell 100 is welded correspondingly with the shorter second negative electrode lug 140 of the other single battery cell 100, which is convenient for operation and is conducive to improving the assembly efficiency. At the same time, the staggered distribution is conducive to reducing the thickness of the electrode lug welding and improving the process yield.

[0027] Optionally, one end of the first positive electrode lug 110 of one single battery cell 100, which is away from the outer edge of the single battery cell 100, is spaced from one end of the second positive electrode lug 120 of the other single battery cell 100, which is away from the center of the single battery cell 100. It can be understood that the first positive electrode lug 110 of one single battery cell 100 is arranged spaced from the second positive electrode lug 120, so as to avoid the first positive electrode lug 110 and the second positive electrode lug 120 from being overlapped during the welding process, thereby adversely affecting the performance of the battery. It should be noted that the size of the gap between the first positive electrode lug 110 and the second positive electrode lug 120 can be determined according to the size of the first positive electrode lug 110 and the second positive electrode lug 120 and the corresponding welding requirements, and the size of the gap is not specifically limited here.

[0028] Optionally, the first negative tab 130 of one single battery cell 100 is spaced from the second negative tab 140 of another single battery cell 100 at the end away from the outer edge of the single battery cell 100. It can be understood that the first negative tab 130 of one single battery cell 100 is spaced from the second negative tab 140, so as to avoid the first negative tab 130 and the second negative tab 140 from being overlapped during the welding process, thereby adversely affecting the performance of the battery. It should be noted that the size of the gap between the first negative tab 130 and the second negative tab 140 can be determined according to the size of the first negative tab 130 and the second negative tab 140 and the corresponding welding requirements, and the size of the gap is not specifically limited herein.

[0029] Optionally, the first positive tab 110 has a size ranging from 22mm to 32mm in the first direction and a size ranging from 14mm to 24mm in the second direction. It should be noted that the first direction is the width direction of the tab of the single battery cell 100, and the second direction is the length direction of the tab of the single battery cell 100. Specifically, the size of the first positive tab 110 in the first direction can be 22mm, 24mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, or 32mm; and the size of the first positive tab 110 in the second direction can be 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, or 24mm. Of course, the size of the first positive tab 110 in the first direction and the second direction can be other values within the above ranges, and is not limited to the above examples. It can be understood that if the size of the first positive tab 110 is too large, the manufacturing cost of the single battery cell 100 will increase, and the size of the single battery cell 100 will also increase, which is not conducive to improving the energy density of the battery. If the size of the first positive tab 110 is too small, the overcurrent capacity of the battery will be insufficient. In the present embodiment, the size of the first positive tab 110 in the first direction is controlled to be within the range of 22mm to 32mm, and the size of the first positive tab 110 in the second direction is controlled to be within the range of 14mm to 24mm, so as to control the size of the single battery cell 100, thereby being conducive to ensuring the energy density of the battery, and also being conducive to ensuring that the battery has a large overcurrent capacity, thereby being conducive to improving the performance of the battery.

[0030] Optionally, the second positive tab 120 has a size in the range of 10mm-20mm along the first direction and a size in the range of 14mm-24mm along the second direction. Specifically, the size of the second positive tab 120 along the first direction can be 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm; and the size of the second positive tab 120 along the second direction can be 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm. Of course, the size of the second positive tab 120 along the first direction and the second direction can be other values in the above range, and is not limited to the above examples. It can be understood that if the size of the second positive tab 120 is too large, the manufacturing cost of the single battery cell 100 will increase, and the size of the single battery cell 100 will also increase, which is not conducive to the improvement of the energy density of the battery. If the size of the second positive tab 120 is too small, the overcurrent capacity of the battery will be insufficient. In the present embodiment, the size of the second positive tab 120 along the first direction is controlled in the range of 22mm-32mm, and the size along the second direction is controlled in the range of 14mm-24mm, which can control the size of the single battery cell 100, is conducive to ensuring the energy density of the battery, and can also ensure that the battery has a large overcurrent capacity, which is conducive to improving the performance of the battery.

[0031] Further optionally, the size of the first positive tab 110 along the second direction is equal to the size of the second positive tab 120 along the second direction.

[0032] Optionally, the first negative tab 130 has a size ranging from 22mm to 32mm along the first direction and a size ranging from 10mm to 20mm along the second direction. Specifically, the first negative tab 130 can have a size of 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, or 32mm along the first direction, and a size of 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm along the second direction. Of course, the first negative tab 130 can have other sizes within the above ranges along the first direction and the second direction, and is not limited to the above examples. It can be understood that if the size of the first negative tab 130 is too large, the manufacturing cost of the single battery cell 100 will increase, and the size of the single battery cell 100 will also increase, which is not conducive to improving the energy density of the battery. If the size of the first negative tab 130 is too small, the overcurrent capacity of the battery will be insufficient. In this embodiment, the size of the first negative tab 130 along the first direction is controlled to be within the range of 22mm to 32mm, and the size along the second direction is controlled to be within the range of 14mm to 24mm, which can control the size of the single battery cell 100, is conducive to ensuring the energy density of the battery, and can also ensure that the battery has a large overcurrent capacity, which is conducive to improving the performance of the battery.

[0033] Optionally, the second negative tab 140 has a size ranging from 10mm to 20mm along the first direction and a size ranging from 10mm to 20mm along the second direction. Specifically, the second negative tab 140 can have a size of 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm along the first direction, and a size of 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm along the second direction. Of course, the second negative tab 140 can have other sizes within the above ranges along the first direction and the second direction, and is not limited to the above examples. It can be understood that if the size of the second negative tab 140 is too large, the manufacturing cost of the single battery cell 100 will increase, and the size of the single battery cell 100 will also increase, which is not conducive to improving the energy density of the battery. If the size of the second negative tab 140 is too small, the overcurrent capacity of the battery will be insufficient. In this embodiment, the size of the second negative tab 140 along the first direction is controlled to be within the range of 22mm to 32mm, and the size along the second direction is controlled to be within the range of 14mm to 24mm, which can control the size of the single battery cell 100, is conducive to ensuring the energy density of the battery, and can also ensure that the battery has a large overcurrent capacity, which is conducive to improving the performance of the battery.

[0034] Optionally, the size of the positive electrode welding pad 101 along the first direction ranges from 3mm to 13mm, and the size along the second direction ranges from 9mm to 19mm. Specifically, the size of the positive electrode welding pad 101 along the first direction can be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, and the size along the second direction can be 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm. Of course, the size of the positive electrode welding pad 101 along the first direction and the second direction can be other values within the above range, and is not limited to the above examples. It can be understood that the size of the positive electrode welding pad 101 is too small, which will reduce the overcurrent capacity of the battery, and the size of the positive electrode welding pad 101 is too large, which is easy to cause internal short circuit and increase the failure probability of the battery. In the embodiment, the size of the positive electrode welding pad 101 along the first direction and the second direction is controlled between 3mm and 13mm and 9mm and 19mm respectively, which can not only ensure that the single battery cell 100 and the cover plate assembly 200 have sufficient welding area, but also can reduce the probability of internal short circuit and improve the working reliability of the battery.

[0035] Optionally, the size of the negative electrode welding pad 102 along the first direction ranges from 6mm to 16mm, and the size along the second direction ranges from 8mm to 18mm. Specifically, the size of the negative electrode welding pad 102 along the first direction can be 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, and the size along the second direction can be 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm. Of course, the size of the negative electrode welding pad 102 along the first direction and the second direction can be other values within the above range, and is not limited to the above examples. It can be understood that the size of the negative electrode welding pad 102 is too small, which will reduce the overcurrent capacity of the battery, and the size of the negative electrode welding pad 102 is too large, which is easy to cause internal short circuit and increase the failure probability of the battery. In the embodiment, the size of the negative electrode welding pad 102 along the first direction and the second direction is controlled between 6mm and 16mm and 8mm and 18mm respectively, which can not only ensure that the single battery cell 100 and the cover plate assembly 200 have sufficient welding area, but also can reduce the probability of internal short circuit and improve the working reliability of the battery.

[0036] Optionally, the shape of the two positive welding pads 101 of the positive welding area 210 is the same, and the area ratio of the first positive tab 110 to the second positive tab 120 is 1.5:1-2:1; and the area ratio of the second positive tab 120 to the positive welding pad 101 is 2:1-3:1. It can be understood that the shape of the first positive tab 110 and the second positive tab 120 formed on the positive welding pad 101 of the positive welding area 210 is the same, on the one hand, it is convenient for welding, on the other hand, the first positive tab 110 and the second positive tab 120 have the same overcurrent capacity.

[0037] Further optionally, the area ratio of the first positive tab 110 to the second positive tab 120 can be 1.5:1, 1.6:1, 1.7:1, 1.8:1, 1.9:1 or 2:1, and can also be other values within the above range, not limited to examples. The area ratio of the second positive tab 120 to the positive welding pad 101 can be 2:1, 2.1:1, 2.2:1, 2.3:1, 2.4:1, 2.5:1, 2.6:1, 2.7:1, 2.8:1, 2.9:1 or 3:1, and can also be other values within the above range, not limited to examples.

[0038] Optionally, the shape of the two negative welding pads 102 of the negative welding area 220 is the same, and the area ratio of the first negative tab 130 to the second negative tab 140 is 1.5:1-2:1; and / or: the area ratio of the second negative tab 140 to the negative welding pad 102 is 1.2:1-1.8:1. It can be understood that the shape of the first negative tab 130 and the second negative tab 140 formed on the positive welding pad 101 of the positive welding area 210 is the same, on the one hand, it is convenient for welding, on the other hand, the first positive tab 110 and the second positive tab 120 have the same overcurrent capacity. Further optionally, the area ratio of the first negative tab 130 to the second negative tab 140 can be 1.5:1, 1.6:1, 1.7:1, 1.8:1, 1.9:1 or 2:1, and can also be other values within the above range, not limited to examples. The area ratio of the second negative tab 140 to the negative welding pad 102 can be 1.2:1, 1.3:1, 1.4:1, 1.5:1, 1.6:1, 1.7:1 or 1.8:1, and can also be other values within the above range, not limited to examples.

[0039] In a specific example, the first positive tab 110, the second positive tab 120, the first negative tab 130, the second negative tab 140, the positive welding pad 101 and the negative welding pad 102 are all rectangular, the size of the first positive tab 110 is 27mm*19mm, the size of the second positive tab 120 is 15mm*19mm, the size of the positive welding pad 101 is 14mm*8mm, the size of the first negative tab 130 is 27mm*15mm, the size of the second negative tab 140 is 15mm*15mm, and the size of the second negative welding pad 102 is 13mm*11mm.

[0040] Embodiment Two

[0041] Referring to Figures 5-7 The parameters of the first positive tab 110, the second positive tab 120, the first negative tab 130, the second negative tab 140, the positive welding pad 101 and the negative welding pad 102 in this embodiment are the same as those in Embodiment One, except that in this embodiment, two first positive tabs 110 are arranged correspondingly, and the ends of the two first positive tabs 110 are arranged at intervals; two first negative tabs 130 are arranged correspondingly, and the ends of the two first negative tabs 130 are arranged at intervals.

[0042] In a specific example, the battery fast charging capacity reaches 5C (i.e. the maximum overcurrent requirement is 835A). Then the positive overcurrent area needs to be 208.75mm 2 , which is distributed to two first positive tabs 110 and two second positive tabs 120, so as to ensure that the area of each positive welding pad 101 is greater than 52.1875mm 2 . Similarly, the area of the positive welding pad 101 is ensured to be greater than 41.75mm 2 .

[0043] In the description of this specification, the description referring to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A battery, characterized by, The utility model relates to a battery cell welding structure and a battery cell welding method, and relates to the technical field of battery cell welding. Two single battery cells (100), each of the single battery cells (100) has first positive tab (110), second positive tab (120), first negative tab (130) and second negative tab (140) arranged at intervals, the first positive tab (110) and the first negative tab (130) are arranged close to the outer edge of the single battery cell (100) with the connecting end of the tab, the second positive tab (120) and the second negative tab (140) are arranged close to the center of the single battery cell (100) with the connecting end of the tab; Cover plate assembly (200), the cover plate assembly (200) is equipped with positive electrode welding area (210) and negative electrode welding area (220), wherein: The first positive tab (110) and the second positive tab (120) of each single battery cell (100) are welded to the positive electrode welding area (210) and form two positive electrode welding marks (101) arranged at intervals, and the first negative tab (130) and the second negative tab (140) of each single battery cell (100) are welded to the negative electrode welding area (220) and form two negative electrode welding marks (102) arranged at intervals.

2. The battery of claim 1, wherein, Two first positive tabs (110) are arranged correspondingly, and the ends of the two first positive tabs (110) are arranged at intervals; two first negative tabs (130) are arranged correspondingly, and the ends of the two first negative tabs (130) are arranged at intervals.

3. The battery of claim 1, wherein, The distance between the first positive tab (110) and the first negative tab (130) of one single battery cell (100) is greater than the distance between the second positive tab (120) and the second negative tab (140), and the distance between the first positive tab (110) and the first negative tab (130) of the other single battery cell (100) is less than the distance between the second positive tab (120) and the second negative tab (140); wherein: The first positive tab (110) of one single battery cell (100) is arranged correspondingly with the second positive tab (120) of the other single battery cell (100), and the first negative tab (130) of one single battery cell (100) is arranged correspondingly with the second negative tab (140) of the other single battery cell (100).

4. The battery of claim 3, wherein, The end of the first positive tab (110) of one single battery cell (100) away from the outer edge of the single battery cell (100) is arranged at intervals with the end of the second positive tab (120) of the other single battery cell (100) away from the center of the single battery cell (100); The end of the first negative tab (130) of one single battery cell (100) away from the outer edge of the single battery cell (100) is arranged at intervals with the end of the second negative tab (140) of the other single battery cell (100) away from the center of the single battery cell (100).

5. The battery of claim 3, wherein, The first positive tab (110) has a size ranging from 22mm to 32mm along a first direction and a size ranging from 14mm to 24mm along a second direction; the second positive tab (120) has a size ranging from 10mm to 20mm along the first direction and a size ranging from 14mm to 24mm along the second direction.

6. The battery of claim 3, wherein, The first negative tab (130) has a size ranging from 22mm to 32mm along a first direction and a size ranging from 10mm to 20mm along a second direction; the second negative tab (140) has a size ranging from 10mm to 20mm along the first direction and a size ranging from 10mm to 20mm along the second direction.

7. The battery of claim 3, wherein, The positive welding pad (101) has a size ranging from 3mm to 13mm along a first direction and a size ranging from 9mm to 19mm along a second direction.

8. The battery of claim 3, wherein, The negative welding pad (102) has a size ranging from 6mm to 16mm along a first direction and a size ranging from 8mm to 18mm along a second direction.

9. The battery of claim 3, wherein, One of the single battery cells (100) has two positive welding pads (101) in the positive welding area (210) and the first positive tab (110) and the second positive tab (120) have an area ratio of 1.5:1 to 2:1; and / or: the second positive tab (120) and the positive welding pad (101) have an area ratio of 2:1 to 3:

1.

10. The battery of claim 3, wherein, One of the single battery cells (100) has two negative welding pads (102) in the negative welding area (220) and the first negative tab (130) and the second negative tab (140) have an area ratio of 1.5:1 to 2:1; and / or: the second negative tab (140) and the negative welding pad (102) have an area ratio of 1.2:1 to 1.8:

1.

11. The battery of any one of claims 1-10, wherein, The single battery cell (100) is a winding battery cell.

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