CN218887236U

CN218887236U - Bipolar plate assembly for solid battery

Info

Publication number: CN218887236U
Application number: CN202223168476.5U
Authority: CN
Inventors: 戴北平
Original assignee: Guangzhou Tongshangde Intelligent Equipment Co ltd
Current assignee: Guangzhou Tongshangde Intelligent Equipment Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-04-18
Anticipated expiration: 2032-11-28

Abstract

The utility model discloses a bipolar plate assembly for solid-state battery, including base plate, positive pole layer and negative pole layer, positive pole layer with the negative pole layer all covers both sides around the base plate, positive pole layer with form electrically conductive region between the negative pole layer, electrically conductive region's both ends respectively with positive pole layer with the negative pole layer links to each other, the base plate is made through punching press an organic whole, positive pole layer is made by anodal material, the negative pole layer is made by negative pole material. The base plate integrally manufactured by stamping is adopted, so that the structural stability of the whole base plate is ensured, and meanwhile, the contact area between the base plate and the positive electrode layer and between the base plate and the negative electrode layer is increased, so that the conductive capacity of the bipolar plate assembly is enhanced; in addition, the rough layer is arranged between the base plate and the positive electrode layer and between the base plate and the negative electrode layer, the surface roughness of the base plate is increased due to the arrangement of the rough layer, firmness between the positive electrode layer and the base plate and firmness between the negative electrode layer and the base plate are increased, and therefore the service life of the bipolar plate assembly is prolonged.

Description

Bipolar plate assembly for solid battery

Technical Field

The utility model relates to a solid state battery field especially relates to a bipolar plate subassembly for solid state battery.

Background

At present, a bipolar plate used by a lead-acid storage battery is of a basic structure, a positive paste is coated on one surface of the lead substrate, a negative paste is coated on the other opposite surface of the lead substrate to form the bipolar plate, but the existing lead substrate is woven by a lead wire through a weaving machine, and the warp and the weft are overlapped and staggered to form a plurality of meshes on the substrate, so that the contact area of the substrate and the paste made in the mode is small, the paste is easy to fall off, the electric conductivity is poor, and the efficiency and the stability of a solid battery are difficult to ensure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bipolar plate subassembly for solid-state battery to solve one or more technical problem in the above-mentioned background art.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a bipolar plate assembly for solid-state battery, includes base plate, positive pole layer and negative pole layer, positive pole layer with the negative pole layer all covers both sides around the base plate, positive pole layer with form electrically conductive region between the negative pole layer, electrically conductive region's both ends respectively with positive pole layer with the negative pole layer links to each other, the base plate is made through punching press an organic whole, positive pole layer is made by anodal material, the negative pole layer is made by negative pole material.

Preferably, the substrate is provided with a plurality of first meshes and second meshes, the first meshes and the second meshes are respectively arranged on the left side and the right side of the conductive area, the positive electrode layer is filled with a plurality of the first meshes, and the negative electrode layer is filled with a plurality of the second meshes.

Preferably, the conductive area comprises a plurality of connecting sheets arranged in front and back, and a hollow part is arranged between every two adjacent connecting sheets.

Preferably, the ratio of the thicknesses of the substrate, the positive electrode layer, and the negative electrode layer is 1:2 to 3:2 to 3.

Preferably, the conductive region further comprises an acid-proof insulating layer, and the acid-proof insulating layer is arranged on the upper side and the lower side of the conductive region.

Preferably, the front side and the rear side of the substrate are both provided with rough layers, and the surface roughness Ra of the rough layers is more than or equal to 6.3 mu m.

Preferably, the rough layer is formed by sandblasting.

Compared with the prior art, the beneficial effects of the utility model are that: the base plate integrally manufactured by stamping is adopted, so that the structural stability of the whole base plate is ensured, and meanwhile, the contact area between the base plate and the positive electrode layer and between the base plate and the negative electrode layer is increased, so that the conductive capacity of the bipolar plate assembly is enhanced; in addition, the rough layer is arranged between the substrate and the positive electrode layer and between the substrate and the negative electrode layer, the surface roughness of the substrate is increased due to the arrangement of the rough layer, the firmness between the positive electrode layer and the substrate and the firmness between the negative electrode layer and the substrate are increased, and therefore the service life of the bipolar plate assembly is prolonged.

Drawings

The accompanying drawings are provided to further illustrate the present invention, but the content in the accompanying drawings does not constitute any limitation to the present invention.

Fig. 1 is a schematic overall structure diagram of one embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of one embodiment of the present invention;

fig. 3 is a schematic structural diagram of a substrate according to an embodiment of the present invention.

Wherein: the acid-proof composite material comprises a substrate 1, a positive electrode layer 2, a negative electrode layer 3, a conductive area 4, a first mesh 11, a second mesh 12, a connecting sheet 13, a hollow-out part 14, an acid-proof insulating layer 5 and a rough layer 6.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The bipolar plate assembly for the solid battery in the embodiment refers to the attached drawing 1, and comprises a substrate 1, an anode layer 2 and a cathode layer 3, wherein the anode layer 2 and the cathode layer 3 are covered on the front side and the rear side of the substrate 1, a conductive area 4 is formed between the anode layer 2 and the cathode layer 3, a conductive part is arranged on the conductive area 4, two ends of the conductive part are respectively connected with the anode layer 2 and the cathode layer 3, the substrate 1 is integrally manufactured through stamping, the anode layer 2 is made of an anode material, and the cathode layer 3 is made of a cathode material.

This embodiment adopts the base plate 1 of making through punching press an organic whole, the holistic structural stability of base plate 1 has been guaranteed, the area of contact between base plate 1 and positive plate 2 and the negative pole layer 3 has still been increased simultaneously, thereby the electric conductivity of bipolar plate subassembly has been strengthened, compare with current weaving lead wire, the production efficiency is improved, can realize the automated production of lead base plate 1, adopt the punching press to compare with other integrated into one piece's manufacture craft, it is convenient to make, the expense of mould has both been practiced thrift, also be convenient for carry out subsequent sandblast processing.

Preferably, referring to fig. 3, a plurality of first meshes 11 and second meshes 12 are formed on the substrate 1, the first meshes 11 and the second meshes 12 are respectively formed on the left side and the right side of the conductive region 4, the positive electrode layer 2 fills the plurality of first meshes 11, and the negative electrode layer 3 fills the plurality of second meshes 12. Therefore, the plurality of first meshes 11 and the plurality of second meshes 12 are formed in the substrate 1, so that the contact area between the substrate 1 and the positive electrode layer 2 and the negative electrode layer 3 is increased, the adhesion of the positive electrode layer 2 and the negative electrode layer 3 is increased, the firmness between the positive electrode layer 2 and the negative electrode layer 3 and the substrate 1 is increased, and the service life of the bipolar plate assembly is prolonged.

Preferably, the conductive part comprises a plurality of connecting sheets 13 arranged in front and back, a hollow part 14 is arranged between the adjacent connecting sheets 13, and two ends of each connecting sheet 13 are respectively connected with the positive electrode layer 2 and the negative electrode layer 3. Therefore, through the arrangement of the hollow-out portions 14, the cross-sectional area of the connecting sheets 13 is reduced, the internal resistance of the bipolar plate assembly is effectively reduced, and the conductive capacity of the bipolar plate assembly is guaranteed. The substrate 1 of the present embodiment is integrally formed by pressing, which facilitates the opening of the hollow portion 14. In addition, the conductive part is provided with a plurality of connecting sheets 13, so that the mechanical property of the whole substrate 1 is enhanced, and the defects of bending or breaking and the like are avoided.

Preferably, the ratio of the thicknesses of the substrate 1, the positive electrode layer 2, and the negative electrode layer 3 is 1:2 to 3:2 to 3. By setting the ratio of the thicknesses of the substrate 1, the positive electrode layer 2, and the negative electrode layer 3 to 1:2 to 3: 2-3, the problem that the anode layer 2 and the cathode layer 3 are easily corroded due to excessively thin thickness is avoided, and the internal resistance is increased due to excessively thick thickness of the anode layer 2 and the cathode layer 3, so that the service life of the bipolar plate assembly is effectively prolonged.

Preferably, referring to fig. 2, the device further includes an acid-proof insulating layer 5, wherein the acid-proof insulating layer 5 is disposed on the upper and lower sides of the conductive region 4. From this, set up acid-proof insulating layer 5, avoided base plate 1 to receive the corruption with electrolyte contact for a long time, prolonged base plate 1's life, in addition, guaranteed through connection piece 13 under the conduction between positive pole layer 2 and the negative pole layer 3, acid-proof insulating layer 5 has still played the insulating effect to electrolyte, has guaranteed solid battery's normal operating.

Preferably, rough layers 6 are arranged on the front side and the rear side of the substrate 1, and the surface roughness Ra of the rough layers 6 is more than or equal to 6.3 mu m. Set up coarse layer 6 between base plate 1 and positive pole layer 2 and negative pole layer 3, coarse layer 6's setting has increased base plate 1's roughness, has increased the firmness between positive pole layer 2 and negative pole layer 3 and the base plate 1 to bipolar plate subassembly's life has been improved.

Further, the rough layer 6 is formed by a sand blast process. After the integrated substrate 1 is formed by press working, the substrate 1 is subjected to a sand blasting process to form rough layers 6 on both front and rear sides of the substrate 1, and finally, the positive electrode layer 2 and the negative electrode layer 3 are formed by filling and curing. Therefore, through sand blasting process treatment, the surface roughness Ra of the front side and the rear side of the substrate 1 is more than or equal to 6.3 microns, the firmness between the positive electrode layer 2 and the negative electrode layer 3 and the substrate 1 is further increased, and the substrate 1 is integrally formed.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The utility model provides a bipolar plate assembly for solid-state battery, its characterized in that includes base plate, positive pole layer and negative pole layer, positive pole layer with the negative pole layer all covers both sides around the base plate, positive pole layer with form electrically conductive region between the negative pole layer, electrically conductive region's both ends respectively with positive pole layer with the negative pole layer links to each other, the base plate is made through punching press an organic whole, positive pole layer is made by anodal material, the negative pole layer is made by negative pole material.

2. The bipolar plate assembly as claimed in claim 1, wherein the substrate has a plurality of first and second meshes, the first and second meshes are respectively formed on left and right sides of the conductive region, the positive electrode layer fills the plurality of first meshes, and the negative electrode layer fills the plurality of second meshes.

3. The bipolar plate assembly for a solid battery as claimed in claim 1, wherein the conductive region includes a plurality of connection pieces arranged in tandem, and a hollow portion is provided between adjacent connection pieces.

4. The bipolar plate assembly for a solid battery as claimed in claim 1, wherein a ratio of thicknesses of the substrate, the positive electrode layer, and the negative electrode layer is 1:2 to 3:2 to 3.

5. The bipolar plate assembly for a solid battery as claimed in claim 1, further comprising acid-proof insulating layers provided on upper and lower sides of the conductive region.

6. The bipolar plate assembly for solid batteries according to claim 1, wherein said substrate is provided with rough layers on both front and rear sides, and the rough layers have a surface roughness Ra of 6.3 μm or more.

7. The bipolar plate assembly for a solid battery as claimed in claim 6, wherein the roughened layer is formed by sand blasting.