CN219658939U

CN219658939U - Full-lug lamination structure

Info

Publication number: CN219658939U
Application number: CN202321331502.3U
Authority: CN
Inventors: 王保; 郭盼; 蒋水连
Original assignee: Shenzhen Xiongtao Lithium Electricity Co ltd; Shenzhen Center Power Tech Co Ltd
Current assignee: Shenzhen Xiongtao Lithium Electricity Co ltd; Shenzhen Center Power Tech Co Ltd
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-09-08
Anticipated expiration: 2033-05-29

Abstract

The utility model provides a full-tab lamination structure, which comprises at least one battery cell unit, wherein the battery cell unit comprises a plurality of positive plates and a plurality of negative plates, and a diaphragm is arranged between the positive plates and the negative plates; a plurality of first positive lugs are arranged on one side of the positive plate, and a plurality of first negative lugs are arranged on one side of the negative plate; when a plurality of positive plates and a plurality of negative plates are stacked, a plurality of first positive lugs and a plurality of first negative lugs are positioned on the same side, the first positive lugs positioned at the same positions on a plurality of positive plates form a first positive lug group, and the first negative lugs positioned at the same positions on a plurality of negative plates form a first negative lug group; the full tab lamination structure further comprises a second positive tab and a second negative tab, wherein the second positive tab is connected with the first positive tab group, and the second negative tab is connected with the first negative tab group. The structure of the utility model has uniform current and heat distribution and low internal resistance of the battery cell, and can be used for quick charge and quick discharge.

Description

Full-lug lamination structure

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a full-tab lamination structure.

Background

At present, hydroelectric, wind power and photovoltaic power generation in new energy sources are easy to be limited by external natural environments, the characteristics of uncertainty, intermittence and uncontrollability are achieved, the maximum amplitude of capacity fluctuation can reach 80% of the installed capacity, the characteristic of inverse peak regulation is presented, and the significant electricity discarding problem is caused. In addition, the problems of insufficient power supply capacity and continuously increased waste power in low-peak period caused by new energy peak dislocation are more remarkable, so that the energy storage technology occupies more remarkable positions in a future power supply system, and the energy storage technology becomes an important means for peak shaving and peak clipping of a power supply.

Compared with the traditional frequency modulation, the energy storage system has the advantages of high response speed, high adjustment precision and stronger comprehensive frequency modulation capability. Therefore, after large-scale and high-proportion new energy and high-capacity direct current are accessed, the energy storage system can enable the power grid to have stronger flexible regulation capability and safety and stability level in the face of the condition of instantaneous fluctuation of power generation of a new system.

However, the single battery cell with large capacity (for example, the capacity is more than 300 Ah) or the large-capacity energy storage battery has more parts, complex structure, large volume and low production efficiency. In addition, the existing high-capacity single battery cell has the problems of uneven internal heat distribution, uneven pole piece current distribution and the like in the charging and discharging process, and the cycle life of the single battery cell is greatly influenced.

Disclosure of Invention

The embodiment of the utility model provides a full-tab lamination structure, which aims to solve the problems that the internal heat distribution and the pole piece current distribution are uneven in the charging and discharging processes of the existing high-capacity single battery cell, the cycle life of the single battery cell is influenced and the like. The utility model adopts the full tab structure, has simple structure, uniform current distribution of the pole pieces, lower heat generation amount in the charging and discharging process and low internal resistance of the battery core, is particularly suitable for high-capacity single battery cores, and can be used for current charging and discharging and quick charging and discharging.

In order to achieve the above purpose, the embodiment of the utility model provides a full tab lamination structure which is suitable for a power battery and comprises at least one cell unit, wherein the cell unit comprises a plurality of positive plates and a plurality of negative plates, and a diaphragm is arranged between the positive plates and the negative plates; a plurality of first positive lugs are arranged on one side of the positive plate, and a plurality of first negative lugs are arranged on one side of the negative plate; when a plurality of positive plates and a plurality of negative plates are stacked, a plurality of first positive lugs and a plurality of first negative lugs are positioned on the same side, the first positive lugs positioned at the same positions on a plurality of positive plates form a first positive lug group, and the first negative lugs positioned at the same positions on a plurality of negative plates form a first negative lug group;

the full tab lamination structure further comprises a second positive tab and a second negative tab, wherein the second positive tab is connected with the first positive tab group, and the second negative tab is connected with the first negative tab group.

When the positive plates and the negative plates are stacked, the first positive lugs at the same positions on the positive plates are connected with each other to form a first positive lug group, and the first negative lugs at the same positions on the negative plates are connected with each other to form a first negative lug group.

As a preferred embodiment, an insulating layer is provided between the second positive electrode tab and the second negative electrode tab.

As a preferred embodiment, the insulating layer includes a first insulating layer disposed on the second positive electrode tab or/and a second insulating layer disposed on the second negative electrode tab.

As a preferred embodiment, the first insulating layer is disposed on a side surface of the second positive electrode tab, which is close to the second negative electrode tab, and the second insulating layer is disposed on a side surface of the second negative electrode tab, which is close to the second positive electrode tab.

As a preferred embodiment, a gap is provided between the second positive electrode tab and the second negative electrode tab.

As a preferred embodiment, the second positive tab includes a positive tab body, a positive post connecting portion disposed at one end of the positive tab body, and a plurality of positive tab connecting portions disposed on the positive tab body, wherein the positive tab connecting portions are connected with the first positive tab group, and the positive tab connecting portions are disposed in one-to-one correspondence with the first positive tab group.

As a preferred embodiment, each positive tab connection portion is disposed on a side surface of the positive tab body in a protruding manner, and the positive tab connection portion is disposed in a manner of being adapted to the first positive tab group.

As a preferred embodiment, the positive tab body, the positive post connecting portion, and the positive tab connecting portion are integrally formed, and the first insulating layer is disposed on a side surface of the positive tab body, which is close to the second negative tab.

As a preferred embodiment, the second negative electrode tab includes a negative electrode tab body, a negative electrode post connecting portion disposed at one end of the negative electrode tab body, and a plurality of negative electrode tab connecting portions disposed on the negative electrode tab body, the negative electrode tab connecting portions are connected with the first negative electrode tab groups, and the negative electrode tab connecting portions are disposed in one-to-one correspondence with the first negative electrode tab groups.

As a preferred embodiment, each negative electrode tab connection portion is disposed on a side surface of the negative electrode tab body in a protruding manner, and the negative electrode tab connection portion is disposed in a matching manner with the first negative electrode tab group.

As a preferred embodiment, the negative electrode tab body, the negative electrode post connecting portion, and the negative electrode tab connecting portion are integrally formed, and the second insulating layer is disposed on a side surface of the negative electrode tab body, which is close to the second positive electrode tab.

As a preferred embodiment, the positive electrode post connecting portion and the negative electrode post connecting portion are respectively disposed at two ends of the full tab lamination structure; the positive pole connecting part is connected with a positive pole of the power battery; the negative pole post connecting part is connected with the negative pole post of the power battery.

As a preferable embodiment, a plurality of the first positive electrode tabs are provided independently of each other, and a plurality of the first negative electrode tabs are provided independently of each other; when a plurality of positive plates and a plurality of negative plates are stacked, the first positive lugs and the first negative lugs are alternately arranged.

As a preferred embodiment, the first positive tab has a height different from the height of the first negative tab.

As a preferable embodiment, when the plurality of positive electrode sheets and the plurality of negative electrode sheets are stacked, a plurality of first positive electrode tab groups are formed, and a plurality of first negative electrode tab groups are formed; the first positive electrode lug groups and the first negative electrode lug groups are alternately arranged, and the first positive electrode lug groups and the first negative electrode lug groups are positioned on the same plane.

As a preferred embodiment, the first positive electrode tab group has a height different from the height of the first negative electrode tab group.

As a preferred embodiment, the full tab lamination is a square full tab lamination; the power battery is a lithium ion battery or a sodium ion battery.

According to the utility model, the first positive electrode lug group and the second positive electrode lug, the first negative electrode lug group and the second negative electrode lug are arranged, so that the first positive electrode lug group and the second positive electrode lug are connected to form a full electrode lug, and the first negative electrode lug group and the second negative electrode lug are connected to form a full electrode lug. Through set up a plurality of first positive lugs on the positive plate, set up a plurality of first negative lugs on the negative plate, can make the inside heat evenly distributed of electric current and electric core of pole piece to can effectively reduce the heat production volume of electric core internal resistance and charge-discharge in-process. The utility model has simple structure, is directly connected with the pole through the pole lug without using a connecting sheet, is particularly suitable for high-capacity single battery cells, and can carry out current charge and discharge and quick charge and discharge.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a full tab lamination structure according to an embodiment of the utility model;

fig. 2 is a schematic structural view of two battery cells of the full tab lamination structure of fig. 1;

FIG. 3 is a schematic diagram of the structure of the single cell unit of FIG. 2;

FIG. 4 is a schematic structural view of a positive plate of the full tab lamination of FIG. 1;

fig. 5 is a schematic structural view of a negative electrode sheet of the full tab lamination structure of fig. 1.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, back, top, bottom … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. 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.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

At present, the existing high-capacity single battery cell has the problems of uneven internal heat distribution, uneven pole piece current distribution and the like in the charging and discharging process, and the cycle life of the single battery cell is influenced. In addition, the high-capacity single battery cell has more parts, larger size and complex structure, so that the production efficiency is low. Based on the above, the embodiment of the utility model provides a full tab lamination structure.

In the full tab lamination structure of the embodiment of the utility model, the number of the battery cells can be set according to actual use requirements, and the battery cells can be set to one, two, three, four or even more.

When a plurality of battery core units are arranged, the battery core units share one second positive electrode lug and one second negative electrode lug, and the number of the positive electrode lug connection parts is set according to the number of the first positive electrode lug groups of all the battery core units (the number of the positive electrode lug connection parts is generally larger than or equal to (preferably equal to) the number of the first positive electrode lug groups); the number of the negative electrode tab connection parts is set according to the number of the first negative electrode tab groups of all the battery cells (generally, the number of the negative electrode tab connection parts is greater than or equal to (preferably equal to) the number of the first negative electrode tab groups).

Specifically, in this embodiment, a full tab lamination structure provided with two battery cells is taken as an example to describe the full tab lamination structure in detail.

As shown in fig. 1 to 5, the present embodiment provides a full tab lamination structure, which is suitable for a power battery, and includes two battery cells 10 (two battery cells 10 are symmetrically disposed), each battery cell 10 includes a plurality of positive electrode plates 11 and a plurality of negative electrode plates 12, and a separator (not identified in the figure) is disposed between the positive electrode plates 11 and the negative electrode plates 12; a plurality of first positive electrode lugs 111 are arranged on one side of the positive electrode plate 11, and a plurality of first negative electrode lugs 121 are arranged on one side of the negative electrode plate 12; when the positive plates 11 and the negative plates 12 are stacked, the first positive tabs 111 and the first negative tabs 121 are positioned on the same side, the first positive tabs 111 positioned at the same position on the positive plates 11 form a first positive tab group a, and the first negative tabs 121 positioned at the same position on the negative plates 12 form a first negative tab group B;

the full tab lamination structure further comprises a second positive tab 20 and a second negative tab 30, wherein the second positive tab 20 is connected with the first positive tab group A, and the second negative tab 30 is connected with the first negative tab group B.

As a preferred embodiment, when the plurality of positive electrode plates 11 and the plurality of negative electrode plates 12 are stacked, the first positive electrode tabs 111 at the same positions on the plurality of positive electrode plates 11 are connected to each other to form a first positive electrode tab group a, and the first negative electrode tabs 121 at the same positions on the plurality of negative electrode plates 12 are connected to each other to form a first negative electrode tab group B. That is, in the embodiment of the present utility model, the first positive electrode tabs stacked in the first positive electrode tab group a are connected to each other, and the first negative electrode tabs stacked in the first negative electrode tab group B are connected to each other.

Taking the first positive lugs at the position X on a plurality of positive plates (the specification and the size are the same and the stacking positions are the same) as an example, the first positive lugs at the same position refer to the first positive lugs arranged at the position X on each positive plate.

In this embodiment, the two battery cells are symmetrically disposed on two sides of the second positive electrode tab 20 (the second negative electrode tab 30), and the second positive electrode tab 20 and the second negative electrode tab 30 may have similar structures. The number of the first positive electrode tabs 111 and the first negative electrode tabs 121 may be set according to actual use requirements, may be set to two, or may be set to three, or may be set to four or more. Specifically, in the present embodiment, the number of the first positive tab 111 of each positive electrode tab and the number of the first negative tab 121 of each negative electrode tab are three.

As a preferred embodiment, an insulating layer (not shown) is disposed between the second positive electrode tab 20 and the second negative electrode tab 30. Through setting up the insulating layer, can effectively prevent to bring about the risk of short circuit because of taking place to contact between second positive electrode ear and the second negative electrode ear.

As a preferred embodiment, the insulating layer includes a first insulating layer (not shown) disposed on the second positive electrode tab 20 or/and a second insulating layer (not shown) disposed on the second negative electrode tab 30. That is, according to actual use requirements, only the first insulating layer may be provided on the second positive electrode tab; or only arranging a second insulating layer on the second negative electrode lug; or in particular, as in the present embodiment, the second anode tab is provided with the first insulating layer and the second cathode tab is provided with the second insulating layer. Simultaneously, the first insulating layer and the second insulating layer are arranged, multiple insulating protection can be realized, and a better insulating effect is achieved.

In a preferred embodiment, the first insulating layer is disposed on a side surface of the second positive electrode tab 20 adjacent to the second negative electrode tab 30, and the second insulating layer is disposed on a side surface of the second negative electrode tab 30 adjacent to the second positive electrode tab 20. Thus, the insulation effect is better. In a preferred embodiment, a gap is provided between the second positive electrode tab 20 and the second negative electrode tab 30. By providing a gap and cooperating with the insulating layer, the risk of short-circuiting due to contact between the second positive tab and the second negative tab can be further prevented.

As a preferred embodiment, the second positive tab 20 includes a positive tab body 21, a positive post connection portion 22 disposed at one end of the positive tab body 21, and a plurality of positive tab connection portions 23 disposed on the positive tab body 21, where the positive tab connection portions 23 are connected to the first positive tab group a, and the positive tab connection portions 23 are disposed in one-to-one correspondence with the first positive tab group a (i.e., the number and positions of the positive tab connection portions 23 are all corresponding to the number and positions of the first positive tab group a).

As a preferred embodiment, each of the positive tab connection portions 23 is disposed on a side surface of the positive tab body 21 in a protruding manner, and the positive tab connection portions 23 are disposed in a manner of being adapted to the first positive tab group a (i.e., the size and shape of the positive tab connection portions 23 are adapted to the size and shape of the first positive tab group a).

As a preferred embodiment, the positive tab body 21, the positive post connection portion 22 and the positive tab connection portion 23 are integrally formed, and the first insulating layer is disposed on a side surface of the positive tab body 21, which is close to the second negative tab 30.

Specifically, in the embodiment of the present utility model, the surfaces of the remaining positions except for the position connected to the positive electrode post connecting portion 22 and the position connected to the positive electrode post connecting portion 23 on the positive electrode tab body 21 are provided with insulating layers. The insulating layer can be arranged in a mode of injection molding, spraying, coating or sleeving a heat-shrinkable sleeve. The insulating layer material may be PP, PPs, or another insulating electrolyte corrosion-resistant material.

As a preferred embodiment, the second negative electrode tab 30 includes a negative electrode tab body 31, a negative electrode pillar connecting portion 32 disposed at one end of the negative electrode tab body 31, and a plurality of negative electrode tab connecting portions 33 disposed on the negative electrode tab body 31, the negative electrode tab connecting portions 33 are connected to the first negative electrode tab group B, and the negative electrode tab connecting portions 33 are disposed in one-to-one correspondence with the first negative electrode tab group B (i.e., the number and positions of the negative electrode tab connecting portions 33 are all corresponding to the number and positions of the first negative electrode tab group B).

As a preferred embodiment, each negative electrode tab connection portion 33 is disposed on a side surface of the negative electrode tab body 31 in a protruding manner, and the negative electrode tab connection portion 33 is disposed in a manner matching the first negative electrode tab group B (i.e., the size and shape of the negative electrode tab connection portion 33 are all matched with the size and shape of the first negative electrode tab group B).

As a preferred embodiment, the negative electrode tab body 31, the negative electrode tab connection portion 32 and the negative electrode tab connection portion 33 are integrally formed, and the second insulating layer is disposed on a side surface of the negative electrode tab body 31, which is close to the second positive electrode tab 20.

Specifically, in the embodiment of the present utility model, the surfaces of the remaining positions except for the position connected to the negative electrode post connecting portion 32 and the position connected to the negative electrode post connecting portion 33 on the negative electrode tab body 31 are provided with insulating layers.

As a preferred embodiment, the positive electrode post connecting portion 22 and the negative electrode post connecting portion 32 are respectively disposed at two ends of the full tab lamination structure; the positive electrode post connecting part 22 is connected with a positive electrode post (not labeled in the figure) of the power battery; the negative electrode terminal connecting portion 32 is connected to a negative electrode terminal (not shown) of the power battery. Therefore, the multipolar lug arrangement of the battery cell can be realized on the premise of not changing the structure of the traditional cover plate; when in use, the conventional cover plate structure is adopted, the positive electrode column connecting part 22 is connected with a positive electrode column (not marked in the figure) of the conventional cover plate structure, and the negative electrode column connecting part 32 is connected with a negative electrode column of the conventional cover plate structure.

As a preferred embodiment, the plurality of first positive electrode tabs 111 are provided independently of each other, and the plurality of first negative electrode tabs 121 are provided independently of each other; when the plurality of positive electrode tabs 11 and the plurality of negative electrode tabs 12 are stacked, the first positive electrode tabs 111 and the first negative electrode tabs 121 are alternately arranged.

As a preferred embodiment, the height of the first positive tab 111 is different from the height of the first negative tab 121. By such arrangement, a gap can be provided between the second positive electrode tab 20 and the second negative electrode tab 30, and thus insulation can be effectively ensured.

Specifically, in this embodiment, the height of the first positive tab 111 is smaller than the height of the first negative tab 121. It is understood that in other embodiments, the height of the first positive tab 111 may be greater than or equal to the height of the first negative tab 121.

As a preferable embodiment, when the plurality of positive electrode sheets 11 and the plurality of negative electrode sheets 12 are stacked, a plurality of first positive electrode tab groups a are formed, and a plurality of first negative electrode tab groups B are formed; the first positive electrode lug groups A and the first negative electrode lug groups B are alternately arranged, and the first positive electrode lug groups A and the first negative electrode lug groups B are positioned on the same plane. Therefore, the connection between parts can be simplified, the space is effectively saved, and the stable connection among the battery cell unit, the second positive electrode lug and the second negative electrode lug can be facilitated on the premise of not changing the traditional cover plate structure, so that the full-tab lamination structure can be assembled into a battery structure by adopting the traditional cover plate structure.

As a preferred embodiment, the first positive tab group a has a height different from that of the first negative tab group B. By means of the arrangement, a gap can be effectively reserved between the second positive electrode lug 20 and the second negative electrode lug 30, and accordingly insulation can be effectively guaranteed.

Specifically, in the present embodiment, the first positive tab group a has a height smaller than that of the first negative tab group B, and at this time, the second positive tab 20 is disposed above the second negative tab 30, and the negative tab connection portion 33 in the overlapping position with the second positive tab 20 is connected to the side surface of the negative tab body 31 through the arc portion 34. The outer surface of the arc portion 34 is also provided with an insulating layer (third insulating layer) to effectively secure insulation.

It is understood that in other embodiments, the height of the first positive tab set a may be greater than or equal to the height of the first negative tab set B.

As a preferred embodiment, the full tab lamination is a square full tab lamination; the power battery is a lithium ion battery or a sodium ion battery. Specifically, in this embodiment, the power battery is a lithium ion battery.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The full-lug lamination structure is characterized by being suitable for a power battery and comprising at least one electric core unit, wherein the electric core unit comprises a plurality of positive plates and a plurality of negative plates, and a diaphragm is arranged between the positive plates and the negative plates; a plurality of first positive lugs are arranged on one side of the positive plate, and a plurality of first negative lugs are arranged on one side of the negative plate; when a plurality of positive plates and a plurality of negative plates are stacked, a plurality of first positive lugs and a plurality of first negative lugs are positioned on the same side, the first positive lugs positioned at the same positions on a plurality of positive plates form a first positive lug group, and the first negative lugs positioned at the same positions on a plurality of negative plates form a first negative lug group;

2. The full tab lamination of claim 1, wherein when the plurality of positive plates and the plurality of negative plates are stacked, the first positive tabs at the same position on the plurality of positive plates are connected to each other to form a first positive tab group, and the first negative tabs at the same position on the plurality of negative plates are connected to each other to form a first negative tab group.

3. The full tab lamination of claim 1, wherein an insulating layer is disposed between the second positive tab and the second negative tab; the insulating layer comprises a first insulating layer arranged on the second positive electrode lug or/and a second insulating layer arranged on the second negative electrode lug.

4. The full tab lamination of claim 1, wherein a gap is provided between the second positive tab and the second negative tab.

5. The full tab lamination of claim 3, wherein the second tab includes a tab body, a tab post connection portion disposed at one end of the tab body, and a plurality of tab connection portions disposed on the tab body, the tab connection portions are connected to the first tab group, and the tab connection portions are disposed in one-to-one correspondence with the first tab group.

6. The full tab lamination of claim 5, wherein each of the positive tab connection portions is provided protruding on a side surface of the positive tab body, and the positive tab connection portions are provided in a fit with the first positive tab group;

the positive electrode lug body, the positive electrode post connecting portion and the positive electrode lug connecting portion are integrally formed, and the first insulating layer is arranged on the side face, close to the second negative electrode lug, of the positive electrode lug body.

7. The full tab lamination of claim 3, wherein the second tab includes a tab body, a tab post connection portion disposed at one end of the tab body, and a plurality of tab connection portions disposed on the tab body, the tab connection portions being connected to the first tab group, and the tab connection portions being disposed in one-to-one correspondence with the first tab group.

8. The full tab lamination of claim 7, wherein each of the negative tab connection portions is disposed on a side of the negative tab body in a protruding manner, and the negative tab connection portions are disposed in a fitting manner with the first negative tab group;

the negative electrode lug body, the negative electrode post connecting portion and the negative electrode lug connecting portion are integrally formed, and the second insulating layer is arranged on the side face, close to the second positive electrode lug, of the negative electrode lug body.

9. The full tab lamination of claim 1, wherein a plurality of the first positive tabs are disposed independently of each other and a plurality of the first negative tabs are disposed independently of each other; when a plurality of positive plates and a plurality of negative plates are stacked, the first positive lugs and the first negative lugs are alternately arranged.

10. The full tab lamination of claim 9, wherein the height of the first positive tab is different from the height of the first negative tab.

11. The full tab lamination of claim 1, wherein when the plurality of positive plates and the plurality of negative plates are stacked, the plurality of first positive tab groups are formed, and the plurality of first negative tab groups are formed; the first positive electrode lug groups and the first negative electrode lug groups are alternately arranged, and the first positive electrode lug groups and the first negative electrode lug groups are positioned on the same plane.

12. The full tab lamination of claim 11, wherein a height of the first positive tab set is different from a height of the first negative tab set;

the full-tab lamination structure is a square full-tab lamination structure; the power battery is a lithium ion battery or a sodium ion battery.