CN221530026U - Z-type laminated battery cell - Google Patents

Abstract

The application discloses a Z-shaped lamination cell which comprises a plurality of cathode laminations and anode laminations. The anode stack includes an anode portion and a separator portion; the cathode laminations are configured to be arranged on Z-shaped anode laminations at intervals along a first direction so as to form the Z-shaped lamination battery cells, a first projection plane is set to be perpendicular to a plane of the first direction, each cathode lamination forms a first orthographic projection on the first projection plane, the first orthographic projection comprises a plurality of first fillets, the anode laminations form a second orthographic projection on the first projection plane, the second orthographic projection comprises a plurality of second fillets, and the first orthographic projection is overlapped with the second orthographic projection. And the Z-shaped lamination cell comprises the fillets, so that the cell is conveniently packaged to generate the cell, and the energy density of the cell is improved.

Description

Z-type laminated battery cell

Technical Field

The application relates to the field of processing of laminated battery cells, in particular to a Z-shaped laminated battery cell.

Background

In modern society, with the progress of lithium ion batteries, the demands for energy density and rate capability of the battery cells are increasing. Compared with a multi-winding structure, the lamination structure has the advantages of energy density, lug position consistency, cell performance, special-shaped battery manufacturing and the like. At present, the production process of the laminated lithium ion battery cell comprises the following steps: first, electrode paste is prepared, then coating and drying are performed, and then sheet-forming and baking are performed on the laminate. And then assembling the positive and negative lamination and the diaphragm lamination into a battery cell, shearing and chamfering the battery cell, and baking, liquid injection, formation and capacity division are carried out on the battery cell.

Wherein, in order to guarantee that electric core adaptation is in the soft packet shell, prevent the turning butt soft packet shell of electric core to make soft packet shell damage, after electric core lamination equipment is accomplished, cut the chamfer to electric core. However, the battery core is sheared after lamination, so that the anode lamination, the cathode lamination and the diaphragm in the battery core are easy to deviate, lithium is separated from the battery, and the energy density and the service life of the battery are reduced.

Disclosure of utility model

The application mainly aims to provide a Z-shaped lamination battery cell, which aims to solve the technical problems that after lamination, the battery cell is sheared, so that offset is easy to occur among an anode lamination, a cathode lamination and a diaphragm in the battery cell, lithium is separated from a battery, and the energy density and the service life of the battery are reduced.

In order to achieve the above object, the present application provides a Z-type laminated battery cell, including:

A plurality of cathode laminations;

An anode lamination including two diaphragm portions arranged at intervals, and an anode portion provided between the diaphragm portions;

The cathode laminations are configured to be arranged on Z-shaped anode laminations at intervals along a first direction so as to form the Z-shaped lamination battery cell, a first projection plane is set to be perpendicular to a plane of the first direction, each cathode lamination forms a first orthographic projection on the first projection plane, the first orthographic projection comprises a plurality of first fillets, the anode laminations form a second orthographic projection on the first projection plane, the second orthographic projection comprises a plurality of second fillets, and the first orthographic projection is overlapped with the second orthographic projection.

In some embodiments, the shape of the first orthographic projection is quadrilateral;

Or/and the combination of the two,

The shape of the second orthographic projection is quadrilateral.

In some embodiments, the corners of the first orthographic projection are rounded corners, and the rounded corners of the first orthographic projection have the same radius;

Or/and the combination of the two,

The four corners of the second orthographic projection are rounded corners, and the radiuses of the rounded corners of the second orthographic projection are the same.

In some embodiments, the Z-shaped laminated cell includes a plurality of cathode tabs, the cathode tabs are connected to the cathode laminations, each of the cathode tabs corresponds to each of the cathode laminations one-to-one, the cathode tabs form a third orthographic projection in the first projection plane, and the third orthographic projection includes a plurality of rounded corners.

In some embodiments, the rounded corners of the first orthographic projection comprise a first corner radius R1, the rounded corners of the third orthographic projection comprise a second corner radius R2, the first corner radius R1 and the second corner radius R2 satisfying: r1 is more than or equal to R2.

In some embodiments, the first corner radius R1 and the second corner radius R2 satisfy: r1 is more than or equal to 1% R2 is less than or equal to 3.

In some embodiments, the Z-stack cell includes a plurality of anode tabs, each of the anode tabs connected to the anode stack, the anode tabs forming a fourth orthographic projection at the first projection plane, the fourth orthographic projection including a plurality of rounded corners.

In some embodiments, the rounded corners of the second orthographic projection include a third corner radius R3, the rounded corners of the fourth orthographic projection include a fourth corner radius R4, the third corner radius R3 and the fourth corner radius R4 satisfy: r3 is more than or equal to R4.

In some embodiments, the third corner radius R3 and the fourth corner radius R4 satisfy: r3 ∈ is 1 ∈ -R4 is less than or equal to 3.

In some embodiments, the second projection plane is a plane perpendicular to the length direction of the anode stack, the anode portion forms a fifth orthographic projection on the second projection plane, and the diaphragm portion forms a sixth orthographic projection on the second projection plane, and the fifth orthographic projection overlaps the sixth orthographic projection.

Compared with the prior art, the application has the beneficial effects that:

In the technical scheme of the application, through the Z-shaped lamination battery cell, the first orthographic projection comprises a plurality of first fillets, namely each cathode lamination comprises a plurality of cathode fillets respectively, the second orthographic projection comprises a plurality of second fillets, namely the anode lamination comprises a plurality of anode fillets respectively, and the first orthographic projection is overlapped with the second orthographic projection. In the application, each cathode lamination and each anode lamination in the Z-type lamination battery cell are subjected to chamfering before lamination, so that the cathode lamination and the anode lamination are accurately aligned in the stacking process, lithium precipitation of the battery is prevented, the energy density and the service life of the battery are improved, and the normal operation of the battery is ensured. Further, the battery cell is guaranteed to be adapted to the soft package shell, and the corner of the battery cell is prevented from being abutted against the soft package shell, so that the soft package shell is damaged, and the energy density of the battery is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application 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 application, 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 first orthographic projection and a third orthographic projection of a first cathode lamination according to an embodiment of the application; wherein a first corner radius R1 and a second corner radius R2 are illustrated;

FIG. 2 is a schematic illustration of a second orthographic projection and a fourth orthographic projection of a first anode stack according to an embodiment of the present application; wherein a third corner radius R3 and a fourth corner radius R4 are illustrated;

FIG. 3 is a schematic view of a first orthographic projection and a third orthographic projection of a first cathode lamination, a second orthographic projection and a fourth orthographic projection of a first anode lamination according to an embodiment of the application;

FIG. 4 is a schematic side view of a first cathode lamination in accordance with an embodiment of the application; wherein the cathode lamination comprises a cathode tab;

FIG. 5 is a schematic side view of a first anode stack according to an embodiment of the application; wherein the anode lamination comprises an anode tab;

FIG. 6 is a schematic side view of a first Z-lamination cell according to one embodiment of the application; wherein the figure shows a first direction X;

Fig. 7 is a schematic view of a fifth orthographic projection and a sixth orthographic projection of a first cathode lamination according to an embodiment of the application.

Reference numerals illustrate:

a Z-lamination cell 10;

Cathode stack 100;

a cathode tab 110;

anode stack 200;

An anode tab 210;

A diaphragm portion 220;

an anode portion 230;

a first orthographic projection 300;

a second orthographic projection 400;

a third orthographic projection 500;

a fourth orthographic projection 600;

a fifth orthographic projection 700;

a sixth orthographic projection 800;

A first direction X.

The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is included in the embodiment of the present application, the directional indication is merely used to explain a relative positional relationship, a movement condition, and the like between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.

In addition, when an element is referred to as being "fixed to" another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, 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, if "and/or", "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B ", including a scheme, or B scheme, or a scheme where a and B meet simultaneously. 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 application.

In order to ensure that the battery cell is adapted to the soft package shell, the corner of the battery cell is prevented from being abutted against the soft package shell, so that the soft package shell is damaged, and after the battery cell lamination is assembled, the battery cell is sheared and chamfered. However, the battery core is sheared after lamination, so that the anode lamination, the cathode lamination and the diaphragm in the battery core are easy to deviate, lithium is separated from the battery, and the energy density and the service life of the battery are reduced.

To solve the above-mentioned problems, the present application proposes a Z-type laminated cell 10, referring to fig. 1 to 6, the Z-type laminated cell 10 includes a plurality of cathode laminations 100 and anode laminations 200. The Z-lamination cell 10 is a cell formed by Z-lamination. The Z-stack cell 10 is configured for placement in a pouch case after assembly of the stack is complete for forming a pouch cell. Z-lamination cell 10 is configured such that Z-lamination cell 10 can be provided in a variety of shapes after lamination assembly is completed. In some embodiments, Z-stack cell 10 may be rectangular. In other embodiments, Z-stack cell 10 may also be cylindrical. In other embodiments, the Z-lamination cell 10 may also be polygonal, etc. In this embodiment, a rectangular Z-type laminated cell 10 is taken as an example.

The specific number of cathode laminations 100 may depend on the actual situation, and the cathode laminations 100 may be provided as two, three, four, etc., for example. Cathode stack 100 may be provided in a variety of shapes. In some embodiments, cathode stack 100 may be rectangular parallelepiped. In other embodiments, cathode stack 100 may also be cylindrical. In other embodiments, cathode stack 100 may also be polygonal, etc. In this embodiment, a rectangular parallelepiped cathode lamination 100 is taken as an example. The cathode laminations 100 are identical in shape and size.

The anode stack 200 includes two separator portions 220 arranged at intervals, and an anode portion 230 provided between the separator portions 220. In some embodiments, the anode portion 230 includes a first end face and a second end face disposed opposite each other, the separator portion 220 includes a third end face, the other separator portion 220 includes a fourth end face, and the first end face is attached to the third end face and the second end face is attached to the fourth end face in a direction along a length of the anode stack 200. Anode stack 200 may be provided in a variety of shapes. In some embodiments, anode stack 200 may be rectangular parallelepiped. In other embodiments, anode stack 200 may also be cylindrical. In other embodiments, anode stack 200 may also be polygonal, etc. In this embodiment, rectangular anode laminate 200 is taken as an example.

Referring to fig. 3 and 6, each cathode lamination 100 is configured to be arranged at intervals in a zigzag shape of anode laminations 200 along a first direction X to form a Z-lamination cell 10. The first projection plane is set to be a plane perpendicular to the first direction X, and the cathode lamination 100 forms a first orthographic projection 300 on the first projection plane, wherein the first orthographic projection 300 includes a plurality of first rounded corners, that is, each cathode lamination 100 includes a plurality of cathode rounded corners. The specific number of cathode fillets in the same cathode stack 100 may depend on the actual situation, and illustratively, the cathode fillets may be provided as two, three, four, etc. The anode stack 200 forms a second orthographic projection 400 on the first projection plane, and the second orthographic projection 400 includes a plurality of second rounded corners, i.e., the anode stack 200 includes a plurality of anode rounded corners. The specific number of anode fillets may depend on the actual situation, and for example, the anode fillets may be provided as two, three, four, etc. The first orthographic projection 300 coincides with the second orthographic projection 400. In the application, each cathode lamination 100 and each anode lamination 200 in the Z-shaped lamination cell 10 are subjected to rounding processing before lamination, so that the cathode lamination 100 and the anode lamination 200 are accurately aligned in the stacking process, lithium precipitation of a battery is prevented, the energy density and the service life of the battery are improved, and the normal operation of the battery is ensured. Further, the battery cell is guaranteed to be adapted to the soft package shell, and the corner of the battery cell is prevented from being abutted against the soft package shell, so that the soft package shell is damaged, and the energy density of the battery is improved.

The shape of the first orthographic projection 300 is determined by the shape of the cathode stack 100, and the first orthographic projection 300 may be provided in a variety of shapes. In some embodiments, the first orthographic projection 300 is quadrilateral. In other embodiments, the quadrilateral may also be circular. In other embodiments, the quadrilateral may also be a polygon or the like. In this embodiment, the first orthographic projection 300 has a quadrilateral shape. Further, the first orthographic projection 300 may be rectangular to fit into a flexible package housing having a rectangular inner cavity. Further, the four corners of the first orthographic projection 300 are rounded corners, and the radiuses of the rounded corners of the first orthographic projection 300 are the same, so that the battery cell is located in the middle of the inner cavity of the soft package shell, the corner of the battery cell is prevented from being abutted to the soft package shell, the soft package shell is damaged, and the energy density of the battery is improved.

The shape of the second orthographic projection 400 is determined by the shape of the cathode stack 100, and the second orthographic projection 400 may be provided in a variety of shapes. In some embodiments, the second orthographic projection 400 is quadrilateral. In other embodiments, the quadrilateral may also be circular. In other embodiments, the quadrilateral may also be a polygon or the like. In this embodiment, the second orthographic projection 400 has a quadrilateral shape. Further, the second orthographic projection 400 may be rectangular to fit into a flexible package housing having a rectangular inner cavity. The four corners of second orthographic projection 400 are the fillet, and the radius of the fillet in the four corners of second orthographic projection 400 is the same to guarantee that the electric core is located the inner chamber middle part of soft packet shell, prevent the turning butt soft packet shell of electric core, in order to make soft packet shell damage, in order to promote the energy density of battery.

In some embodiments, referring to fig. 1 and 2, the rounded corners of the first orthographic projection 300 include a first rounded corner radius R1, the rounded corners of the second orthographic projection 400 include a third rounded corner radius R3, the first rounded corner radius R1 and the third rounded corner radius R3 satisfy: r3 is less than or equal to R1, so as to ensure that the first orthographic projection 300 is completely overlapped with the second orthographic projection 400, and the area of the first orthographic projection 300 is smaller than the projection area of the second orthographic projection 400, and ensure that lamination of the anode lamination 200 and the cathode lamination 100 is performed normally. Note that, the first corner radius R1 and the third corner radius R3 satisfy: when r3=r1, the area of the first orthographic projection 300 is still smaller than the projected area of the second orthographic projection 400.

The Z-type laminated cell 10 includes a plurality of cathode tabs 110, referring to fig. 4, the specific number of the cathode tabs 110 may be determined according to practical situations, and exemplary cathode tabs 110 may be provided in two, three, four, etc. The cathode tab 110 may be provided in various shapes. In some embodiments, the cathode tab 110 may have a rectangular parallelepiped shape. In other embodiments, the cathode tab 110 may also be cylindrical. In other embodiments, the cathode tab 110 may also be polygonal, etc. In the present embodiment, a rectangular parallelepiped cathode tab 110 is taken as an example. The cathode tabs 110 are connected to the cathode laminations 100, and each cathode tab 110 corresponds to each cathode lamination 100 one by one. The cathode tab 110 forms a third orthographic projection 500 on the first projection plane, and the third orthographic projection 500 includes a plurality of rounded corners, that is, the cathode tab 110 includes a plurality of rounded corners of the cathode tab 110. The rounded corners of the cathode tab 110 may also be located at the connection between the cathode tab 110 and the cathode lamination 100, so as to prevent the cathode tab 110 from breaking due to the right angle, enhance the stability of connection of the cathode tab 110 to the lamination, and ensure the normal operation of the battery cell. The specific number of the rounded corners of the cathode tab 110 may depend on the actual situation, and illustratively, the rounded corners of the cathode tab 110 may be provided as two, three, four, etc.

In some embodiments, referring to fig. 1, the rounded corners of the first orthographic projection 300 include a first rounded corner radius R1 and the rounded corners of the third orthographic projection 500 include a second rounded corner radius R2, the first rounded corner radius R1 and the second rounded corner radius R2 satisfying: r1 is more than or equal to R2. Further, the first corner radius R1 satisfies: r1 is more than or equal to 3mm and is more than or equal to 0.3mm. Illustratively, the first corner radius R1 may be 3mm, 2.6mm, 2.2mm, 1.8mm, 1.4mm, 1mm, and the like. The second corner radius R2 satisfies: r2 is more than or equal to 1.5mm and is more than or equal to 0.3mm. Illustratively, the second corner radius R2 may be 1.5mm, 1.3mm, 1.1mm, 0.9mm, 0.7mm, 0.5mm, and so forth. It should be noted that the values of the first corner radius R1 and the second corner radius R2 should be moderate. When the first fillet radius R1 and the second fillet radius R2 are larger, the impact resistance of the battery cell is stronger, and the lithium precipitation phenomenon is not easy to generate, but the energy density of the battery cell is lower, so that the energy storage capacity of the battery cell is weaker, and the overall performance of the battery is lower. When the first fillet radius R1 and the second fillet radius R2 are smaller, the energy density of the battery core is higher, so that the energy storage capacity of the battery core is stronger, but the impact resistance of the battery core is weaker, and the lithium precipitation phenomenon is easy to generate, so that the overall performance of the battery is lower. Therefore, when the values of the first fillet radius R1 and the second fillet radius R2 are moderate, the energy density of the battery core is moderate, so that the energy storage capacity of the battery core is moderate, but the impact resistance of the battery core is moderate, and the overall performance of the battery is higher.

In some embodiments, the first fillet radius R1 and the second fillet radius R2 satisfy: r1 is more than or equal to 1% R2 is less than or equal to 3. Illustratively, the ratio R1/R2 of the first fillet radius R1 to the second fillet radius R2 may be 1, 1.5, 2, 2.5, 3, and so forth. It should be noted that the ratio R1/R2 of the first corner radius R1 to the second corner radius R2 should be moderate. When the ratio R1/R2 of the first fillet radius R1 to the second fillet radius R2 is larger, the interval between the cathode tab 110 and the cathode lamination 100 is smaller, which results in easy lithium precipitation between the cathode tab 110 and the cathode lamination 100 and lower battery life. When the ratio R1/R2 of the first fillet radius R1 to the second fillet radius R2 is smaller, the second fillet radius R2 of the cathode tab 110 and the cathode lamination 100 is smaller, so that the cathode tab 110 is easily broken, and the connection stability of the cathode tab 110 and the cathode lamination 100 is reduced. Therefore, the ratio R1/R2 of the first fillet radius R1 to the second fillet radius R2 should be moderate, so as to reduce the possibility of lithium precipitation between the cathode tab 110 and the cathode lamination 100 while ensuring stable connection between the cathode tab 110 and the cathode lamination 100.

The Z-type laminated cell 10 includes a plurality of anode tabs 210, referring to fig. 5, the specific number of the anode tabs 210 may be determined according to practical situations, and exemplary anode tabs 210 may be provided in two, three, four, etc. The anode tab 210 may be provided in various shapes. In some embodiments, the anode tab 210 may have a rectangular parallelepiped shape. In other embodiments, the anode tab 210 may also be cylindrical. In other embodiments, the anode tab 210 may also be polygonal, etc. In this embodiment, a rectangular anode tab 210 is taken as an example. Each anode tab 210 is connected to the anode stack 200, and the anode tabs 210 form a fourth orthographic projection 600 on the first projection plane, wherein the fourth orthographic projection 600 includes a plurality of rounded corners, that is, the anode tabs 210 include a plurality of anode tab 210 rounded corners. The rounded corner of the anode tab 210 can also be located at the connection position between the anode tab 210 and the anode lamination 200, so as to prevent the anode tab 210 from breaking due to the right angle, enhance the stability of connection of the anode tab 210 to the lamination, and ensure the normal operation of the battery cell. The specific number of the anode tab 210 rounded corners may depend on the actual situation, and for example, the anode tab 210 rounded corners may be provided as two, three, four, etc.

In some embodiments, referring to fig. 2, the rounded corners of the second orthographic projection 400 include a third rounded corner radius R3, the rounded corners of the fourth orthographic projection 600 include a fourth rounded corner radius R4, and the third rounded corner radius R3 and the fourth rounded corner radius R4 satisfy: r3 is more than or equal to R4. Further, the third corner radius R3 satisfies: r3 is more than or equal to 3mm and is more than or equal to 0.3mm. Illustratively, the third corner radius R3 may be 3mm, 2.6mm, 2.2mm, 1.8mm, 1.4mm, 1mm, and so forth. The fourth corner radius R4 satisfies: r4 is more than or equal to 1.5mm and is more than or equal to 0.3mm. Illustratively, the fourth corner radius R4 may be 1.5mm, 1.3mm, 1.1mm, 0.9mm, 0.7mm, 0.5mm, and so forth. It should be noted that the values of the third corner radius R3 and the fourth corner radius R4 should be moderate. When the third fillet radius R3 and the fourth fillet radius R4 are larger, the impact resistance of the battery cell is stronger, and the lithium precipitation phenomenon is not easy to generate, but the energy density of the battery cell is lower, so that the energy storage capacity of the battery cell is weaker, and the overall performance of the battery is lower. When the third fillet radius R3 and the fourth fillet radius R4 are smaller, the energy density of the battery core is higher, so that the energy storage capacity of the battery core is stronger, but the impact resistance of the battery core is weaker, and the lithium precipitation phenomenon is easy to generate, so that the overall performance of the battery is lower. Therefore, when the values of the third fillet radius R3 and the fourth fillet radius R4 are moderate, the energy density of the battery core is moderate, so that the energy storage capacity of the battery core is moderate, but the impact resistance of the battery core is moderate, and the overall performance of the battery is higher.

In some embodiments, the third corner radius R3 and the fourth corner radius R4 satisfy: r3 ∈ is 1 ∈ -R4 is less than or equal to 3. Illustratively, the ratio R3/R4 of the third fillet radius R3 to the fourth fillet radius R4 may be 1, 1.5, 2, 2.5, 3, and so on. It should be noted that the ratio R3/R4 of the third corner radius R3 to the fourth corner radius R4 should be moderate. When the ratio R3/R4 of the third fillet radius R3 to the fourth fillet radius R4 is larger, the spacing between the anode tab 210 and the anode lamination 200 is smaller, which results in easy lithium precipitation between the anode tab 210 and the anode lamination 200 and lower battery life. When the ratio R3/R4 of the third fillet radius R3 to the fourth fillet radius R4 is smaller, the fourth fillet radius R4 of the anode tab 210 and the anode lamination 200 is smaller, so that the anode tab 210 is easily broken, and the connection stability of the anode tab 210 and the anode lamination 200 is reduced. Therefore, the ratio R3/R4 of the third fillet radius R3 to the fourth fillet radius R4 should be moderate, so as to reduce the possibility of lithium precipitation between the anode tab 210 and the anode lamination 200 while ensuring stable connection between the anode tab 210 and the anode lamination 200.

Referring to fig. 6 and 7, the second projection plane is a plane perpendicular to the length direction of the anode stack 200, the anode portion 230 forms a fifth orthographic projection 700 on the second projection plane, the diaphragm portion 220 forms a sixth orthographic projection 800 on the second projection plane, and the fifth orthographic projection 700 overlaps the sixth orthographic projection 800. In some embodiments, the anode portion 230 has a length a, the separator portion 220 has a length B, and the lengths a and B satisfy: A-B is more than or equal to 0.2mm. Illustratively, the difference A-B between the length A and the length B may be 0.2mm, 0.3mm, 0.4mm, and so on.

It should be noted that, the zigzag lamination, the anode lamination 200 and the cathode lamination 100 disclosed in the present application may be referred to in the prior art, and will not be described herein.

Furthermore, it should be noted that the description of the present application and the accompanying drawings show preferred embodiments of the present application, but the present application can be embodied in many different forms and is not limited to the embodiments described in the present specification, which are not to be construed as additional limitations on the content of the present application, but are provided for the purpose of making a thorough understanding of the present disclosure. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present application described in the specification; further, modifications and variations of the present application may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this application as defined in the appended claims.

Claims (10)

1. A Z-shaped laminated battery cell, characterized by comprising the following steps:

A plurality of cathode laminations;

An anode lamination including separator portions arranged at intervals, and an anode portion provided between the separator portions;

The cathode lamination is arranged on the Z-shaped anode lamination at intervals along the first direction so as to form the Z-shaped lamination battery cell, a first projection plane is perpendicular to the plane of the first direction, each cathode lamination forms a first orthographic projection on the first projection plane, the first orthographic projection comprises a plurality of first fillets, the anode lamination forms a second orthographic projection on the first projection plane, the second orthographic projection comprises a plurality of second fillets, and the first orthographic projection is overlapped with the second orthographic projection.

2. The Z-lamination cell of claim 1, wherein,

The shape of the first orthographic projection is quadrilateral;

Or/and the combination of the two,

The shape of the second orthographic projection is quadrilateral.

3. The Z-lamination cell of claim 2, wherein,

The four corners of the first orthographic projection are rounded corners, and the radiuses of the rounded corners of the first orthographic projection are the same;

Or/and the combination of the two,

The four corners of the second orthographic projection are rounded corners, and the radiuses of the rounded corners of the second orthographic projection are the same.

4. The Z-lamination cell of claim 1, wherein,

The Z-shaped lamination battery cell comprises a plurality of cathode tabs, the cathode tabs are connected with the cathode laminations, the cathode tabs are in one-to-one correspondence with the cathode laminations, the cathode tabs form a third orthographic projection on the first projection plane, and the third orthographic projection comprises a plurality of fillets.

5. The Z-laminated cell of claim 4, wherein,

The fillet of first orthographic projection includes first fillet radius R1, the fillet of third orthographic projection includes second fillet radius R2, first fillet radius R1 with second fillet radius R2 satisfies: r1 is more than or equal to R2.

6. The Z-laminated cell of claim 5, wherein,

The first corner radius R1 and the second corner radius R2 satisfy: r1 is more than or equal to 1% R2 is less than or equal to 3.

7. The Z-lamination cell of claim 1, wherein,

The Z-shaped lamination battery cell comprises a plurality of anode lugs, each anode lug is connected with the anode lamination, the anode lugs form fourth orthographic projection on the first projection plane, and the fourth orthographic projection comprises a plurality of fillets.

8. The Z-lamination cell of claim 7, wherein,

The fillet of second orthographic projection includes third fillet radius R3, the fillet of fourth orthographic projection includes fourth fillet radius R4, third fillet radius R3 with fourth fillet radius R4 satisfies: r3 is more than or equal to R4.

9. The Z-lamination cell of claim 8, wherein,

The third corner radius R3 and the fourth corner radius R4 satisfy: r3 ∈ is 1 ∈ -R4 is less than or equal to 3.

10. The Z-lamination cell of claim 1, wherein,

The second projection plane is perpendicular to the plane of the length direction of the anode lamination, the anode part forms a fifth orthographic projection on the second projection plane, the diaphragm part forms a sixth orthographic projection on the second projection plane, and the fifth orthographic projection is overlapped with the sixth orthographic projection.