CN218548478U

CN218548478U - Battery core positive electrode structure and laminated battery with same

Info

Publication number: CN218548478U
Application number: CN202221106366.3U
Authority: CN
Inventors: 张晓辉
Original assignee: Shanghai Daoying Industrial Co ltd
Current assignee: Shanghai Daoying Industrial Co ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2023-02-28
Anticipated expiration: 2032-05-09

Abstract

The utility model discloses a battery cell anode structure and a laminated battery with the same, wherein the battery cell anode structure comprises an anode substrate (1); the top surface of the positive electrode substrate (1) is provided with a first conductor coating part (2) and a first substrate extension part (3); the bottom surface of the positive electrode substrate (1) is provided with a second conductor coating part (4) and a second substrate extension part (5); the first conductor coating part (2) and the second conductor coating part (4) are arranged at the same end of the positive electrode substrate (1); the first substrate extension part (3) and the second substrate extension part (5) are disposed at the other end of the positive electrode substrate (1). The utility model provides an electricity core positive pole structure and have its lamination battery, the layer is connected more stably between utmost point and is difficult not hard up, effectively avoids unusual emergence such as short circuit. Meanwhile, the laminated battery provided by the embodiment has better shock resistance and strength.

Description

Battery core positive electrode structure and laminated battery with same

Technical Field

The utility model relates to a battery field especially relates to an electric core positive pole structure and have its lamination battery.

Background

The laminated battery is a lithium ion battery which is formed by cutting a positive electrode and a negative electrode into sheets, laminating the sheets with an isolating film to form a battery cell monomer, and laminating a plurality of battery cell monomers in parallel. In the laminated battery in the prior art, the positive and negative electrodes are connected to the conductors on the battery case by the conductor connecting members, so that the conductors are electrically connected to the connecting terminals of the external circuit. The connection mode in the prior art has a complex structure and is easy to loosen, so that the problems of short circuit and the like are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electric core positive pole structure and have its lamination battery.

The utility model provides a battery core anode structure, which comprises an anode substrate (1); the top surface of the positive electrode substrate (1) is provided with a first conductor coating part (2) and a first substrate extension part (3); the bottom surface of the positive electrode substrate (1) is provided with a second conductor coating part (4) and a second substrate extension part (5); the first conductor coating part (2) and the second conductor coating part (4) are arranged at the same end of the positive electrode substrate (1); the first substrate extension part (3) and the second substrate extension part (5) are disposed at the other end of the positive electrode substrate (1).

And a rectangular annular first colloid part (6) is arranged at the peripheral edge of the first conductor coating part (2). The periphery of the second conductor coating part (4) is provided with a rectangular annular second colloid part (7). The top surface of the first colloid part (6) protrudes 0.2 mm from the surface of the first conductor coating part (2). The bottom surface of the second colloid part (7) protrudes out of the coating surface of the second conductor coating part (4) by 0.2 mm. The first colloid part (6) and the second colloid part (7) comprise colloid parts and ceramic particles uniformly distributed in the colloid parts.

The utility model provides a laminated battery, laminated battery is formed by laminating a plurality of battery cell positive electrode structures (100) and a plurality of battery cell negative electrode structures (200); an isolating membrane (300) is arranged between the battery cell positive electrode structure (100) and the battery cell negative electrode structure (200); the cell positive electrode structure is as described above.

A third substrate extension part (201) is arranged on the top surface of one end, away from the first substrate extension part (3), of the battery cell negative electrode structure (200); and a fourth substrate extension part (202) is arranged on the bottom surface of one end, far away from the second substrate extension part (5), of the battery cell negative electrode structure (200). The first substrate extension part (3) and the second substrate extension part (5) of the plurality of battery cell positive electrode structures (100) sequentially increase from top to bottom and are converged at the top of the laminated battery to form a first folding part (401); the third substrate extension part (201) and the fourth substrate extension part (202) of the plurality of cell negative electrode structures (200) sequentially increase from bottom to top and are converged at the bottom of the laminated battery to form a second folding part (501). The first folded portion (401) and the second folded portion (501) are respectively disposed at opposite sides of the laminated battery.

The utility model provides an electricity core positive pole structure and have its lamination battery, the layer is connected more stably between utmost point and is difficult not hard up, effectively avoids unusual emergence such as short circuit. Meanwhile, the laminated battery provided by the embodiment has better shock resistance and strength.

Drawings

Fig. 1 is a schematic structural view of a laminated battery according to a second embodiment of the present invention;

fig. 2 is a schematic top structure view of a positive electrode substrate in the cell positive electrode structure according to the first embodiment.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Example one

As shown in fig. 1 or fig. 2, the present embodiment provides a cell positive electrode structure 100, which includes a positive electrode substrate 1; the top surface of the positive electrode substrate 1 is provided with a first conductor coating part 2 and a first substrate extension part 3; the bottom surface of the positive electrode substrate 1 is provided with a second conductor coating part 4 and a second substrate extension part 5; the first conductor coating portion 2 and the second conductor coating portion 4 are provided at the same end of the positive electrode substrate 1; the first substrate extension portion 3 and the second substrate extension portion 5 are disposed at the other end of the positive electrode substrate 1. As will be understood by those skilled in the art, the positive electrode substrate 1 is a copper substrate, and the first conductor-coated portion 2 and the second conductor-coated portion 4 may be formed by coating and firing lithium cobaltate, lithium manganate or lithium iron phosphate slurry.

The periphery of the first conductor coating part 2 is provided with a rectangular annular first colloid part 6.

And a rectangular annular second colloid part 7 is arranged at the peripheral edge of the second conductor coating part 4.

As will be understood by those skilled in the art, the provision of the first and

second colloid parts

6 and 7 can increase the friction between the first and second conductor-coated

parts

2 and 4 and the positive electrode substrate 1, effectively improving the first and second conductor-coated

parts

2 and 4 and the adhesion effect; the arrangement of the first colloid part 6 and the second colloid part 7 can effectively increase the elasticity and the anti-seismic performance between the battery stacks.

The top surface of the first colloid part 6 protrudes 0.2 mm from the surface of the first conductor coating part 2.

The bottom surface of the second colloid part 7 protrudes 0.2 mm from the cladding surface of the second conductor coating part 4.

It will be understood by those skilled in the art that the first and

second gel portions

6 and 7 protrude from the first and second

conductor coating portions

2 and 4, which further increases the shock resistance between the battery stacks.

The first colloid part 6 and the second colloid part 7 each include a colloid part and ceramic particles uniformly distributed in the colloid part. It will be appreciated by those skilled in the art that the provision of ceramic particles increases the strength of the first and second

colloidal portions

6, 7 without affecting the electrical conductivity.

Example two

The present embodiment provides a laminated battery, which is formed by stacking a plurality of cell positive electrode structures 100 and a plurality of cell negative electrode structures 200; a separation film 300 is further arranged between the battery cell positive electrode structure 100 and the battery cell negative electrode structure 200; the cell positive electrode structure is as described in the first embodiment. As can be understood by those skilled in the art, the laminated battery provided by the embodiment has more stable connection between the layers and is not easy to loose, and the abnormal occurrence of short circuit and the like is effectively avoided. Meanwhile, the laminated battery provided by the embodiment has better shock resistance and strength.

The top surface of one end of the cell negative electrode structure 200, which is far away from the first substrate extension part 3, is provided with a third substrate extension part 201; the bottom surface of the end of the cell negative electrode structure 200 away from the second substrate extension portion 5 is provided with a fourth substrate extension portion 202.

The first substrate extension portion 3 and the second substrate extension portion 5 of the plurality of cell positive electrode structures 100 sequentially increase from top to bottom and converge at the top of the laminated battery to form a first folding portion 401.

The third substrate extension 201 and the fourth substrate extension 202 of the plurality of cell negative electrode structures 200 sequentially increase from bottom to top and converge at the bottom of the laminated battery to form a second folded portion 501.

The first folding part 401 and the second folding part 501 are respectively arranged at two opposite sides of the laminated battery.

As can be appreciated by those skilled in the art, the first folded part 401 of the positive electrode and the second folded part 501 of the negative electrode are respectively disposed at the top and the bottom of two opposite sides of the laminated battery, so that the positive electrode and the negative electrode are respectively connected with the conductor on the battery shell, the structure is firmer, and the electrical conductivity is better.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The battery core positive electrode structure is characterized by comprising a positive electrode substrate (1); the top surface of the positive electrode substrate (1) is provided with a first conductor coating part (2) and a first substrate extension part (3); the bottom surface of the positive electrode substrate (1) is provided with a second conductor coating part (4) and a second substrate extension part (5); the first conductor coating part (2) and the second conductor coating part (4) are arranged at the same end of the positive electrode substrate (1); the first substrate extension part (3) and the second substrate extension part (5) are disposed at the other end of the positive electrode substrate (1).

2. The cell positive electrode structure according to claim 1, wherein the first conductor coating portion (2) is provided with a rectangular ring-shaped first colloid portion (6) at its peripheral edge.

3. The cell positive electrode structure according to claim 2, wherein the second conductor coating portion (4) is provided with a rectangular annular second colloid portion (7) at the peripheral edge thereof.

4. The cell positive electrode structure according to claim 3, wherein the top surface of the first gel portion (6) protrudes 0.2 mm above the surface of the first conductor coating portion (2).

5. The cell positive electrode structure according to claim 4, wherein the bottom surface of the second colloid part (7) protrudes 0.2 mm from the envelope surface of the second conductor coating part (4).

6. The cell positive electrode structure according to claim 5, wherein the first gel portion (6) and the second gel portion (7) each comprise a gel portion and ceramic particles uniformly distributed within the gel portion.

7. A laminated battery is characterized in that the laminated battery is formed by laminating a plurality of battery cell positive electrode structures (100) and a plurality of battery cell negative electrode structures (200); an isolating membrane (300) is arranged between the battery cell positive electrode structure (100) and the battery cell negative electrode structure (200); the cell positive electrode structure of claim 6.

8. The laminated battery according to claim 7, wherein a top surface of an end of the cell negative electrode structure (200) remote from the first base extension (3) is provided with a third base extension (201); and a fourth substrate extension part (202) is arranged on the bottom surface of one end, far away from the second substrate extension part (5), of the battery cell negative electrode structure (200).

9. The laminated battery according to claim 8, wherein the first substrate extension portion (3) and the second substrate extension portion (5) of the plurality of cell positive electrode structures (100) sequentially grow from top to bottom and are converged at the top of the laminated battery to form a first folded portion (401); the third substrate extension part (201) and the fourth substrate extension part (202) of the plurality of cell negative electrode structures (200) sequentially increase from bottom to top and are converged at the bottom of the laminated battery to form a second folding part (501).

10. The laminated battery according to claim 9, wherein the first fold (401) and the second fold (501) are respectively disposed on opposite sides of the laminated battery.