Laminated battery cell, battery and electric equipment

Abstract

The utility model belongs to the technical field of battery cells, and particularly relates to a laminated battery cell, a battery and electric equipment. The laminated battery cell comprises an isolating membrane, at least two first poles and at least one second pole piece; one adjacent first pole piece is arranged on the other adjacent first pole piece in a sleeving manner; a first opening is formed in the side end of the first pole piece; a second opening is formed in the second pole piece; the second pole piece is sleeved on one first pole piece along the first opening of one first pole piece, and the other first pole piece is sleeved on the second pole piece along the second opening of the second pole piece, so that the first pole piece, the isolating membrane and the second pole piece are sequentially stacked. According to the laminated battery cell, the structural stability of the laminated battery cell can be improved, a synergistic effect can be achieved, the multiplying power of the current battery cell is effectively improved, and meanwhile, the battery cell is endowed with higher safety performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery cores, and in particular relates to a laminated battery core, a battery and an electrical device. Background Art

[0002] Lithium-ion battery manufacturing technology is a key technology for the development of the new energy industry. The battery cell is an important component of lithium-ion batteries. The battery cell can generally be prepared through two processes: lamination and winding. When the battery cell is prepared by the lamination process, a predetermined number of positive electrode sheets, separators and negative electrode sheets are stacked in sequence to form a battery cell, and then the stacked battery cell is hot pressed.

[0003] However, the Z-type stacking structure of the prior art may have inter-layer delamination problems and corner warping problems, resulting in poor structural stability; at the same time, the existing ratio cannot meet people's growing needs. Utility Model Content

[0004] The purpose of the utility model is to provide a laminated battery core in view of the deficiencies in the prior art, so as to improve the structural stability of the laminated battery core.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A laminated battery cell comprises an isolation membrane, at least two first poles and at least one second pole piece; one of the adjacent first pole pieces is sleeved on another adjacent first pole piece; and a first opening is provided at a side end of the first pole piece; a second opening is provided on the second pole piece; the second pole piece is sleeved on the first pole piece along the first opening of one of the first pole pieces, and another of the first pole pieces is sleeved on the second pole piece along the second opening of the second pole piece, so that the first pole piece, the isolation membrane and the second pole piece are stacked in sequence.

[0007] Preferably, the first pole piece includes a first hollow foil folded body and at least two first horizontal portions; one end of all the first horizontal portions are respectively connected to two ends of the first hollow foil folded body, and the first opening is formed between the other ends of all the first horizontal portions;

[0008] And / or, the second pole piece includes a second hollow foil folded body and at least two second horizontal portions; one end of all the second horizontal portions are respectively connected to two ends of the second hollow foil folded body, and the second opening is formed between the other ends of all the second horizontal portions.

[0009] Preferably, the left or right projections of all the first empty foil folded bodies have at least a partially overlapping area; the left or right projections of all the second empty foil folded bodies have at least a partially overlapping area; and the left or right projection of the first empty foil folded body and the left or right projection of the second empty foil folded body have at least a partially overlapping area;

[0010] And / or, all upper or lower projections of the first horizontal parts have at least a partially overlapping area; all upper or lower projections of the second horizontal parts have at least a partially overlapping area; the upper or lower projection of the first horizontal part and the upper or lower projection of the second horizontal part have at least a partially overlapping area.

[0011] Preferably, the first hollow foil folded body comprises a first vertical hollow foil metal portion and a first horizontal hollow foil metal portion connected to both sides of the first vertical hollow foil metal portion; and the first horizontal hollow foil metal portion is connected to the first horizontal portion;

[0012] And / or, the first horizontal portion includes a first metal portion and a first active material layer disposed on at least one surface of the first metal portion.

[0013] Preferably, the relationship between the length W1 of the first hollow foil folded body and the thickness H1 of the first vertical hollow foil metal portion is: W1>H1.

[0014] Preferably, the second hollow foil folded body comprises a second vertical hollow foil metal portion and second horizontal hollow foil metal portions connected to both sides of the second vertical hollow foil metal portion; and the second horizontal hollow foil metal portion is connected to the second horizontal portion;

[0015] And / or, the second horizontal portion includes a second metal portion and a second active material layer disposed on at least one surface of the second metal portion.

[0016] Preferably, the relationship between the length W2 of the second hollow foil folded body and the thickness H2 of the second vertical hollow foil metal portion is: W2>H2.

[0017] Preferably, the laminated battery core further includes a first connecting component and a second connecting component; the first connecting component is respectively connected to all the first empty foil folded bodies; the second connecting component is respectively connected to all the second empty foil folded bodies.

[0018] Preferably, the laminated battery cell also includes at least two tab bodies; the tab bodies are respectively connected to the first pole piece and the second pole piece; and the tab bodies are extended along the plane where the width and thickness of the laminated battery cell are located, or the tab bodies are bent from the plane where the width and thickness of the laminated battery cell are located; and the tab bodies are extended from the plane where the width and thickness of the laminated battery cell are located toward the plane where the length and width of the laminated battery cell are located.

[0019] Preferably, the first pole piece is a U-shaped first pole piece; and / or the second pole piece is a U-shaped second pole piece.

[0020] The utility model also discloses a battery, comprising the laminated battery core.

[0021] The utility model also discloses an electric device, comprising the battery.

[0022] The beneficial effect of the utility model lies in that the technical solution adopts a method of staggered covering of the first pole piece and the second pole piece to form an embracing interlayer assembly structure, which effectively reduces or avoids phenomena such as wrinkles, folding or warping, thereby effectively improving the structural stability of the stacked battery cell, and can also play a synergistic role, effectively improving the current battery cell rate, while giving the battery cell higher safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following will refer to the attached Figures 1 to 6 To describe the features, advantages and technical effects of exemplary embodiments of the present utility model.

[0024] Figure 1 This is a schematic structural diagram of a laminated battery cell according to an embodiment of the utility model;

[0025] Figure 2 This is a schematic structural diagram of a laminated battery cell according to another embodiment of the utility model;

[0026] Figure 3 This is a schematic structural diagram of a first pole piece of a laminated battery cell according to an embodiment of the utility model;

[0027] Figure 4 This is a schematic structural diagram of the second pole piece of a laminated battery cell according to an embodiment of the present utility model;

[0028] Figure 5 It is a schematic diagram of the assembly state of the tab body of the laminated battery cell according to one embodiment of the utility model;

[0029] Figure 6 It is a schematic diagram of the assembly state of the tab body of a laminated battery cell according to another embodiment of the utility model.

[0030] In the figure: 100-first pole piece; 101-first opening; 102-first horizontal portion; 103-first hollow foil folded body; 104-first connecting component; 105-first metal portion; 106-first active material layer; 107-first vertical hollow foil metal portion; 108-first horizontal hollow foil metal portion; 200-second pole piece; 201-second opening; 202-second horizontal portion; 203-second hollow foil folded body; 204-second connecting component; 205-second metal portion; 206-second active material layer; 207-second vertical hollow foil metal portion; 208-second horizontal hollow foil metal portion; 300-isolating membrane; 400-ear body; 401-first horizontal connecting portion; 402-arc-shaped bending portion; 403-second horizontal connecting portion. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0033] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship between laminated cells, batteries, and electrical equipment to describe associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and multiple situations exist alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship between laminated cells, batteries, and electrical equipment.

[0035] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0036] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] The following is combined with Figure 1 to Figure 6 The utility model is further described in detail, but it is not intended to limit the utility model.

[0039] like Figure 1 As shown, in one embodiment of the utility model, the stacked battery cell includes an isolation membrane 300, at least two first pole pieces 100 and at least one second pole piece 200; the isolation membrane 300 is arranged between the first pole piece 100 and the second pole piece 200; one of the adjacent first pole pieces 100 is sleeved on the other adjacent first pole piece 100; and a first opening 101 is provided at the side end of the first pole piece 100; a second opening 201 is provided on the second pole piece 200; the second pole piece 200 is sleeved on the first pole piece 100 along the first opening 101 of one of the first pole pieces 100, and the other first pole piece 100 is sleeved on the second pole piece 200 along the second opening 201 of the second pole piece 200, so that the first pole piece 100, the isolation membrane 300 and the second pole piece 200 are stacked in sequence.

[0040] The technical solution of the utility model adopts a method of staggered covering of the first pole piece and the second pole piece to form an embracing interlayer assembly structure, which effectively reduces or avoids phenomena such as wrinkles, folding or warping, thereby effectively improving the structural stability of the stacked battery cell, and can also play a synergistic role, effectively improving the current battery cell rate, while giving the battery cell higher safety performance.

[0041] Specifically, in some embodiments, Figure 1 As shown, the first pole piece 100 is a U-shaped first pole piece; the second pole piece 200 is a U-shaped second pole piece; that is, the U-shaped second pole piece is sleeved on the surface of the U-shaped first pole piece from the first opening side of one U-shaped first pole piece; the other U-shaped first pole piece is sleeved on the surface of the U-shaped second pole piece from the second opening side of the U-shaped second pole piece. Figure 1 and 2 As shown, the number of first pole pieces 100 is at least three, the number of second pole pieces 200 is at least two, and the number of isolation membranes 300 is one; all of the first pole pieces 100 are arranged in sequence from the outside to the inside, and all of the second pole pieces 200 are arranged in sequence from the outside to the inside; and one of the second pole pieces 200 is sleeved on the first pole piece 100 along the first opening 101 of one of the first pole pieces 100, another first pole piece 100 is sleeved on the second pole piece 200 along the second opening 201 of one of the second pole pieces 200, another second pole piece 200 is sleeved on the first pole piece 100 along the first opening 101 of another first pole piece 100, and another first pole piece 100 is sleeved on the second pole piece 200 along the second opening 201 of another second pole piece 200; and so on to the outermost layer, the isolation membrane 300 is interspersed between the first pole piece 100 and the second pole piece 200 in a Z shape.

[0042] Specifically, the first pole piece 100 is one of the anode piece and the cathode piece; the second pole piece 200 is the other of the anode piece and the cathode piece. In other words, the anode piece and the cathode piece are mutually wrapped and arranged in sequence, and so on to the outermost layer, and the isolation film 300 is interspersed between the cathode and anode pieces in a Z shape.

[0043] Specifically, in some embodiments, Figure 1 and 2 As shown, the first pole piece 100 includes a first hollow foil folded body 103 and at least two first horizontal portions 102; one end of all the first horizontal portions 102 are respectively connected to the two ends of the first hollow foil folded body 103, and the first opening 101 is formed between the other ends of all the first horizontal portions 102; wherein, as Figure 2 and 3As shown, the number of first horizontal portions 102 is two, and they are respectively arranged at the two ends of the first empty foil folded body 103 to form a U-shaped first pole piece. Specifically, the second pole piece 200 includes a second empty foil folded body 203 and at least two second horizontal portions 202; one end of all the second horizontal portions 202 is respectively connected to the two ends of the second empty foil folded body 203, and the other ends of all the second horizontal portions 202 form the second opening 201; wherein, as Figure 2 and 3 As shown, there are two second horizontal portions 202 , which are respectively disposed at two ends of the second hollow foil folded body 203 to form a U-shaped second pole piece.

[0044] Wherein, in some embodiments, Figure 2 As shown, there are at least partially overlapping areas in the left or right projections of all the first empty foil folded bodies 103 and the left or right projections of all the second empty foil folded bodies 203; there are at least partially overlapping areas in the upper or lower projections of all the first horizontal parts 102 and the upper or lower projections of all the second horizontal parts 202. That is, there are at least partially overlapping areas in the left or right projections of all the first empty foil folded bodies 103; there are at least partially overlapping areas in the left or right projections of all the second empty foil folded bodies 203; and there are at least partially overlapping areas in the left or right projections of the first empty foil folded bodies 103 and the left or right projections of the second empty foil folded bodies 203; there are at least partially overlapping areas in the upper or lower projections of all the first horizontal parts 102; there are at least partially overlapping areas in the upper or lower projections of all the second horizontal parts 202; there are at least partially overlapping areas in the upper or lower projections of the first horizontal part 102 and the upper or lower projections of the second horizontal part 202. That is to say, after the first pole piece 100, the second pole piece 200 and the isolation film 300 are stacked in sequence, the first empty foil fold 103 reserved for the U-shaped first pole piece and the second empty foil fold 203 reserved for the U-shaped second pole piece are respectively located at the left and right ends of the stacking core, and the first horizontal portion 102 reserved for the U-shaped first pole piece and the second horizontal portion 202 reserved for the U-shaped second pole piece are respectively located at the upper and lower ends of the stacking core. This structure can improve the structural stability of the stacking core, and can effectively avoid or reduce the phenomenon that the outermost pole piece is easy to wrinkle and fold; thereby, it can increase the battery cell rate and improve safety performance.

[0045] Specifically, in some embodiments, Figure 2 and 3 As shown, the first hollow foil folded body 103 includes a first vertical hollow foil metal portion 107 and two first horizontal hollow foil metal portions 108 obliquely connected to both sides of the first vertical hollow foil metal portion 107; and the first horizontal hollow foil metal portion 108 is connected to the first horizontal portion 102. In some embodiments, as Figure 3As shown, the relationship between the length W1 of the first hollow foil folded body 103 and the thickness H1 of the first vertical hollow foil metal portion 107 is: W1>H1. In other words, the active material in the hollow foil area is processed more to avoid the phenomenon of the active material layer bulging during the bending process, thereby improving the stability of the structure.

[0046] Specifically, in some embodiments, Figure 2 and 3 As shown, the first horizontal portion 102 includes a first metal portion 105 and a first active material layer 106 disposed on at least one surface of the first metal portion 105 .

[0047] In some embodiments, the first vertical hollow foil metal part 107, the first horizontal hollow foil metal part 108, and the first metal part 105 are integrally fixed. That is, the active material layer in the middle of the first pole piece 100 is removed, leaving the hollow foil area; thereby, the structural stability of the battery cell can be improved, and the outermost layer is wrapped, and only the outermost layer of the first pole piece 100 has the risk of warping.

[0048] Specifically, in some embodiments, Figure 1 , 2 As shown in FIG. 3 , the laminated battery core further includes a first connecting component 104, which is respectively connected to all first vertical hollow foil metal parts 107. The first connecting component 104 is a structure produced by electric welding; that is, all first vertical hollow foil metal parts 107 are welded together through welding bridges.

[0049] Specifically, in some embodiments, Figure 3 and 4 As shown, the second hollow foil folded body 203 includes a second vertical hollow foil metal portion 207 and two second horizontal hollow foil metal portions 208 obliquely connected to both sides of the second vertical hollow foil metal portion 207; and the second horizontal hollow foil metal portion 208 is connected to the second horizontal portion 202. Figure 4 As shown, the relationship between the length W2 of the second hollow foil folded body 203 and the thickness H2 of the second vertical hollow foil metal portion 207 is: W2>H2. In other words, the active material in the hollow foil area is processed more to avoid the phenomenon of the active material layer bulging during the bending process, thereby improving the stability of the structure.

[0050] Specifically, in some embodiments, Figure 2 and 3 As shown, the second horizontal portion 202 includes a second metal portion 205 and a second active material layer 206 disposed on at least one surface of the second metal portion 205 .

[0051] Among them, in some embodiments, the second vertical hollow foil metal part 207, the second horizontal hollow foil metal part 208, and the second metal part 105 are integrally fixed. That is, the active material layer in the middle of the second pole piece 200 is removed, leaving the hollow foil area; thereby improving the structural stability of the battery cell, and the outermost layer is wrapped so that the second pole piece 200 is wrapped inside, thereby achieving that only the outermost layer of the first pole piece 100 has the risk of warping.

[0052] Specifically, in some embodiments, Figure 1 , 2 As shown in FIG4 , the laminated cell further includes a second connecting component 204, which is respectively connected to all second vertical hollow foil metal parts 207. The second connecting component 204 is a structure produced by electric welding; that is, all second vertical hollow foil metal parts 207 are welded together through welding bridges.

[0053] Specifically, in some embodiments, the laminated battery core further includes at least two tab bodies 400; the tab bodies 400 are connected to the first hollow foil folded body 103 and the second hollow foil folded body 203 respectively; and the tab bodies 400 are extended along the plane where the width and thickness of the laminated battery core are located, or the tab bodies 400 are bent from the plane where the width and thickness of the laminated battery core are located; and the tab bodies 400 are extended from the plane where the width and thickness of the laminated battery core are located toward the plane where the length and width of the laminated battery core are located. Among them, in one embodiment, as Figure 5 As shown, the pole ear body 400 includes a first horizontal connection part 401, an arc-shaped bending part 402 and a second horizontal connection part 403 which are connected in sequence; wherein, when on the first pole piece 100, the first horizontal connection part 401 is connected to the first empty foil folded body 103; one end of the arc-shaped bending part 402 is bent toward the first horizontal part 102, and is connected to one end of the second horizontal connection part 403; the other end of the second horizontal connection part 403 is extended along the length direction of the first pole piece 100; when on the second pole piece 200, the first horizontal connection part 401 is connected to the second empty foil folded body 203; one end of the arc-shaped bending part 402 is bent toward the second horizontal part 202, and is connected to one end of the second horizontal connection part 403; the other end of the second horizontal connection part 403 is extended along the length direction of the second pole piece 200. This structure can effectively lead the S-shaped positive and negative pole ears to the top sealing edge, thereby effectively reducing the assembly space. wherein, as Figure 6 As shown, in other embodiments, the tab body 400 only includes a first horizontal connecting portion 401, and the first horizontal connecting portion 401 is extended along the length direction of the first pole piece 100 or the second pole piece 200. This structure can be directly welded to the shell in a square shell through the first horizontal connecting portion 401, thereby improving the convenience of assembly.

[0054] The utility model also proposes a battery, which includes a laminated battery cell. The specific structure of the laminated battery cell refers to the above-mentioned embodiment. Since the battery adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0055] The utility model also proposes an electrical device, which includes a battery. The specific structure of the battery refers to the above embodiment. Since the electrical device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0056] Among them, the electrical equipment described in the embodiments of the present application is suitable for various battery-using devices, such as mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys and electric tools, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0058] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the above specific implementation, and any obvious improvement, replacement or modification made by the technicians in this field on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.

Claims

1. A laminated battery cell, characterized in that: It includes an isolation membrane, at least two first pole pieces and at least one second pole piece; one of the adjacent first pole pieces is sleeved on another adjacent first pole piece; and a first opening is provided at the side end of the first pole piece; a second opening is provided on the second pole piece; the second pole piece is sleeved on the first pole piece along the first opening of one of the first pole pieces, and another first pole piece is sleeved on the second pole piece along the second opening of the second pole piece, so that the first pole piece, the isolation membrane and the second pole piece are stacked in sequence.

2. The laminated battery cell according to claim 1, characterized in that: The first pole piece includes a first hollow foil folded body and at least two first horizontal portions; one end of all the first horizontal portions are respectively connected to two ends of the first hollow foil folded body, and the first opening is formed between the other ends of all the first horizontal portions; And / or, the second pole piece includes a second hollow foil folded body and at least two second horizontal portions; one end of all the second horizontal portions are respectively connected to two ends of the second hollow foil folded body, and the second opening is formed between the other ends of all the second horizontal portions.

3. The laminated battery cell according to claim 2, characterized in that: All left or right projections of the first empty foil folded bodies have at least a partially overlapping area; all left or right projections of the second empty foil folded bodies have at least a partially overlapping area; and the left or right projection of the first empty foil folded body and the left or right projection of the second empty foil folded body have at least a partially overlapping area; And / or, all upper or lower projections of the first horizontal parts have at least a partially overlapping area; all upper or lower projections of the second horizontal parts have at least a partially overlapping area; the upper or lower projection of the first horizontal part and the upper or lower projection of the second horizontal part have at least a partially overlapping area.

4. The laminated battery core according to claim 2 or 3, characterized in that: The first hollow foil folded body includes a first vertical hollow foil metal portion and a first horizontal hollow foil metal portion connected to both sides of the first vertical hollow foil metal portion; and the first horizontal hollow foil metal portion is connected to the first horizontal portion; And / or, the first horizontal portion includes a first metal portion and a first active material layer disposed on at least one surface of the first metal portion.

5. The laminated battery cell according to claim 4, characterized in that: The relationship between the length W1 of the first hollow foil folded body and the thickness H1 of the first vertical hollow foil metal portion is: W1>H1.

6. The laminated battery core according to claim 2 or 3, characterized in that: The second hollow foil folded body includes a second vertical hollow foil metal portion and second horizontal hollow foil metal portions connected to both sides of the second vertical hollow foil metal portion; and the second horizontal hollow foil metal portion is connected to the second horizontal portion; And / or, the second horizontal portion includes a second metal portion and a second active material layer disposed on at least one surface of the second metal portion.

7. The laminated battery cell according to claim 6, characterized in that: The relationship between the length W2 of the second hollow foil folded body and the thickness H2 of the second vertical hollow foil metal portion is: W2>H2.

8. The laminated battery cell according to claim 2, characterized in that: The laminated battery core further includes a first connecting component and a second connecting component; the first connecting component is respectively connected to all the first empty foil folded bodies; and the second connecting component is respectively connected to all the second empty foil folded bodies.

9. The laminated battery cell according to claim 1, characterized in that: The laminated battery cell also includes at least two tab bodies; the tab bodies are connected to the first pole piece and the second pole piece respectively; and the tab bodies are extended along the plane where the width and thickness of the laminated battery cell are located, or the tab bodies are bent from the plane where the width and thickness of the laminated battery cell are located; and the tab bodies are extended from the plane where the width and thickness of the laminated battery cell are located toward the plane where the length and width of the laminated battery cell are located.

10. The laminated battery core according to claim 1 or 2, characterized in that: The first pole piece is a U-shaped first pole piece; and / or the second pole piece is a U-shaped second pole piece.

11. A battery, characterized in that: The laminated battery cell comprises the laminated battery cell according to any one of claims 1 to 10.

12. An electrical equipment, characterized in that: The battery comprising the battery as claimed in claim 11 above.

Images