CN115332602A

CN115332602A - New energy accumulator

Info

Publication number: CN115332602A
Application number: CN202110512346.XA
Authority: CN
Inventors: 邱瑞光; 邱敏慈; 邱敏瑄
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2022-11-11

Abstract

The invention discloses a new energy accumulator, which comprises a positive electrode, a negative electrode and a plurality of solid electrolytes respectively arranged between the positive electrode and the negative electrode; the positive electrode material of the positive electrode, the solid electrolyte and the negative electrode material of the negative electrode are overlapped to form an energy storage section, the first bending part and the second bending part at one end of each energy storage section are bent, the first bending part and the second bending part at the other end of each energy storage section are reversely bent, so that the positive electrode conducting layers at one side of any two energy storage sections are mutually folded and contacted, the negative electrode conducting layers at one side of any two energy storage sections are mutually folded and contacted, a plurality of energy storage sections can be mutually overlapped, and the plurality of energy storage sections are in a parallel connection state.

Description

New energy accumulator

Technical Field

The invention relates to an energy storage device, in particular to a new energy storage device.

Background

Lithium ion batteries are composed of a positive electrode and a negative electrode which are separated by a porous separator and a liquid electrolyte which acts as an ion conductive matrix, in the lithium ion batteries, the liquid is electrolyzed into combustible substances, and when the lithium ion batteries are short-circuited, fire disasters can be easily caused in the short-circuiting process, so certain safety is worried about use; therefore, more and more people adopt the solid electrolyte to replace the traditional liquid electrolyte to manufacture the solid battery, thereby not only improving the safety problem of the lithium battery, but also solving the requirement of the energy density of the lithium battery.

Referring to fig. 1, a general solid-state battery 1 includes a plurality of battery cells 11 and separators 12 respectively disposed between any two battery cells 11; each cell 11 has a solid electrolyte 111, a positive plate 112 and a negative plate 113 respectively disposed on two sides of the solid electrolyte 111, wherein a positive connection end 1121 protrudes from one end of the positive plate 112, a negative connection end 1131 protrudes from the negative plate 113 opposite to the positive connection end 1121, and the isolation film 12 is disposed between each positive plate 112 and the negative plate 113 of another cell 11; therefore, in the manufacturing process, the battery cells 11 and the isolation films 12 must be stacked one on another according to the sequentially set capacities, which results in a reduction in production efficiency and an increase in production cost, and in the process of stacking each battery cell 11 and another battery cell 11, the isolation films 12 must be stacked again to increase the thickness, and after stacking, the positive connection terminals 1121 must be connected to form a positive output, that is, the negative connection terminals 1131 must be connected to form a negative output, which results in an increase in the overall volume and a poor heat dissipation effect, thereby resulting in a space for improvement.

Disclosure of Invention

Therefore, the present invention is directed to a new energy accumulator, which can increase the production speed and reduce the production cost.

Therefore, the invention relates to a new energy accumulator, which comprises a positive electrode, a negative electrode and a plurality of solid electrolytes respectively arranged between the positive electrode and the negative electrode; the positive electrode, the solid electrolyte and the negative electrode are formed with a plurality of energy storage sections, namely, each energy storage section is formed by overlapping the positive electrode material of the positive electrode, the solid electrolyte and the negative electrode material of the negative electrode, simultaneously, the first bending part and the second bending part at one end of each energy storage section are bent, simultaneously, the first bending part and the second bending part at the other end of each energy storage section are reversely bent, so that the positive electrode conducting layers at one side of any two energy storage sections are mutually folded and contacted, and the negative electrode conducting layers at one side of any two energy storage sections are mutually folded and contacted, so that the energy storage sections can be mutually overlapped, and the energy storage sections are in a parallel state, thereby improving the production efficiency and reducing the production cost, and simultaneously, adopting a parallel connection mode of stacking large-area contact, and relatively improving the charging and discharging performances.

Drawings

FIG. 1 is a schematic exploded view of the prior art;

FIG. 2 is an exploded view of the first preferred embodiment of the present invention;

FIG. 3 is a schematic view of a first preferred embodiment of the present invention;

FIG. 4 is a schematic bending view of the first preferred embodiment of the present invention;

FIG. 5 is a schematic view of the first preferred embodiment of the present invention after being bent;

FIG. 6 is an exploded view of a second preferred embodiment of the present invention;

FIG. 7 is a schematic view of a second preferred embodiment of the present invention;

FIG. 8 is a schematic view of a second preferred embodiment of the present invention after bending;

FIG. 9 is an exploded view of a third preferred embodiment of the present invention;

fig. 10 is a bending diagram of the third preferred embodiment of the invention.

Description of the symbols:

[ Prior Art ]

1: new energy accumulator

11: battery core

12: isolation film

111: solid electrolyte

112: positive plate

113: negative plate

1121: positive electrode connecting end

1131: negative electrode connecting end

[ invention ]

3: new energy accumulator

31 positive electrode

311 positive electrode conductive layer

312 positive electrode material

3111 first bending part

32 negative electrode

321 negative electrode conducting layer

322, anode material:

3211 second bending part

33 solid electrolyte

A energy storage section

34 isolating film

341 insulating layer

342 is provided with an opening

Detailed Description

These and other aspects, features and advantages of the present invention will become apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.

Referring to fig. 2 and 3, the first preferred embodiment of the present invention includes a positive electrode 31, a negative electrode 32, and a plurality of solid electrolytes 33 respectively disposed between the positive electrode 31 and the negative electrode 32; the positive electrode 31 has a positive conductive layer 311, a positive material 312 disposed on the positive conductive layer 311 at an interval, a first bending part 3111 is disposed on the positive conductive layer 311 and between any two positive materials 312, the positive conductive layer 311 can be a conductive metal (such as copper foil), the positive material 312 can be lithium iron phosphate, and the thickness of the positive material 312 can be preferably 10um to 1 mm; in addition, the negative electrode 32 has a negative electrode conductive layer 321 and a negative electrode material 322 disposed on the negative electrode conductive layer 321 at an interval, and a second bending portion 3211 disposed opposite to the first bending portion 3111 is disposed on the negative electrode conductive layer 321 and between any two negative electrode materials 322, the negative electrode conductive layer 321 can be a conductive metal (such as copper foil), the negative electrode material 322 can be a lithium metal, and the thickness of the negative electrode material 322 can be preferably 1nm to 1mm.

As mentioned above, the solid electrolyte 33 is disposed between the positive electrode material 312 and the negative electrode material 322, and the solid electrolyte 33 can be a sulfide solid electrolyte (e.g., li) ₁₀ GEP ₂ S ₁₂ ) Oxide solid electrolytes (e.g., li) ₇ LAZr ₂ O ₁₂ ) The thickness of the solid electrolyte can be 10 um-2 mm; referring to fig. 4 and 5, the positive electrode material 312, the solid electrolyte 33, and the negative electrode material 322 are stacked to form an energy storage segment a, and the first bending portion 3111 and the second bending portion 3211 at one end of each energy storage segment a are bent, and the first bending portion 3111 and the second bending portion 3211 at the other end of each energy storage segment a are bent in opposite directions, so that the positive electrode conductive layers 311 on one side of any two energy storage segments a are in folded contact with each other, and the negative electrode conductive layers 321 on the other side of any two energy storage segments a are in folded contact with each other.

Referring to fig. 4 and 5, in the manufacturing process, after the anode 31 and the cathode 32 are manufactured, the anode 31, the cathode 32 and the solid electrolyte 33 are respectively combined, and then the energy storage sections a are bent according to the required stacking capacity, so that any two energy storage sections a can be stacked, and the new energy storage device 3 can be rapidly manufactured, therefore, compared with the prior art that a layer-by-layer gradual stacking and bonding manner is adopted, the present invention can directly stack the energy storage sections a by bending after bonding the whole energy storage section a in advance, which can effectively improve the production efficiency and reduce the production cost, and the anode conductive layer 311 of the energy storage section a in each stack are connected with each other, the cathode conductive layer 321 and the anode conductive layer 321 are connected with each other in a large area, which is also helpful for the heat dissipation effect, and the overall volume can be reduced by the stacking manner, so that the new energy storage device 3 can be thinner under the condition of the same energy density, or the energy storage section a can be increased in parallel connection under the limited energy volume, and the charging performance of the energy storage section a can be improved.

Referring to fig. 6, 7 and 8, the second preferred embodiment of the new energy storage device of the invention still includes the structures of the positive electrode 31, the negative electrode 32 and the solid electrolyte 33, and the above-mentioned components, connection relations and effects to be achieved are the same as the first embodiment and will not be described in detail here, and particularly, in this embodiment, the second preferred embodiment further includes at least one isolation film 34 disposed between the positive electrode 31 and the negative electrode 32, or two isolation films 34 may be disposed as shown in fig. 9 and 10, and this embodiment is described as being provided with one isolation film 34, and the isolation film 34 has an isolation layer 341 and a plurality of openings 342 equidistantly disposed on the isolation layer 341, and the openings 342 are provided for the solid electrolyte 33 to pass through, and in cooperation with fig. 8, the isolation layer 341 can further isolate the positive conductive layer 311 from the negative conductive layer 321, and the openings 342 are provided for the solid electrolyte 33 to pass through, so that, by the design of the isolation film 34, the situation that the short circuit generated by the contact between the positive conductive layer 321 and the negative conductive layer 321 can be effectively avoided after bending.

To sum up, the new energy accumulator of the present invention forms a plurality of energy storage sections among the positive electrode, the solid electrolyte and the negative electrode, that is, each energy storage section is formed by stacking the positive electrode material of the positive electrode, the solid electrolyte and the negative electrode material of the negative electrode, and the first bending part and the second bending part at one end of each energy storage section are bent, and the first bending part and the second bending part at the other end of each energy storage section are reversely bent, so that the positive electrode conductive layers at one side of any two energy storage sections are folded and contacted with each other, and the negative electrode conductive layers at one side of any two energy storage sections are folded and contacted with each other, so that the plurality of energy storage sections can be stacked together, and the plurality of energy storage sections are formed in a parallel state, which can improve the production efficiency and reduce the production cost, and can relatively improve the charging and discharging performance, so as to achieve the purpose of the present invention.

However, the above description is only for the purpose of illustrating the preferred embodiments of the present invention, and should not be taken as limiting the scope of the invention, i.e., the invention is intended to cover all the modifications and equivalents of the claims and their equivalents.

Claims

1. A new energy accumulator is characterized by comprising:

the positive electrode is provided with a positive electrode conducting layer and a positive electrode material arranged on the positive electrode conducting layer at intervals, and a first bending part is arranged on the positive electrode conducting layer and positioned between any two positive electrode materials;

a negative electrode, which is provided with a negative electrode conducting layer and a negative electrode material arranged on the negative electrode conducting layer at intervals, wherein a second bending part arranged opposite to the first bending part is arranged on the negative electrode conducting layer and positioned between any two negative electrode materials; and

the positive material, the solid 24907 and the negative material are overlapped to form an energy storage region, the first bending part and the second bending part at one end of each energy storage region are bent, and the first bending part and the second bending part at the other end of each energy storage region are bent reversely, so that positive conducting layers positioned on one side of any two energy storage regions are mutually folded and contacted, and negative conducting layers positioned on the other side of any two energy storage regions are mutually folded and contacted.

2. The new energy storage device as claimed in claim 1, further comprising at least one isolation film disposed between the positive electrode and the negative electrode, wherein the isolation film has an isolation layer and a plurality of openings equidistantly formed on the isolation layer, the isolation layer can isolate the positive conductive layer from the negative conductive layer, and the openings can allow the solid electrolyte to pass through.

3. The new energy accumulator according to claim 1, wherein the thickness of the positive electrode material is 10um to 1mm.

4. The new energy accumulator according to claim 1, wherein the thickness of the negative electrode material is 1nm to 1mm.

5. The new energy accumulator according to claim 1, wherein the solid electrolyte has a thickness of 10um to 2mm.

6. The new energy accumulator according to claim 1, wherein the positive electrode material is lithium iron phosphate.

7. The new energy accumulator as claimed in claim 1, wherein the negative electrode material is lithium metal.

8. The new energy accumulator according to claim 1, wherein the solid electrolyte is one of a sulfide solid electrolyte, an oxide solid electrolyte, and a carbide solid electrolyte.

9. The new energy accumulator as claimed in claim 1, characterized in that the sulfide solid-state electrolyte is Li ₁₀ GEP ₂ S ₁₂ 。

10. The new energy storage device according to claim 1, wherein the oxide solid state electrolyte is Li ₇ LAZr ₂ O ₁₂ 。