CN-122000483-A - Structural battery for vehicle

Abstract

A structural battery for a vehicle may include a plurality of positive electrode layers, a plurality of electrolyte layers, and a plurality of negative electrode layers stacked one on top of the other, wherein the positive electrode layers and the negative electrode layers each include a positive electrode and a negative electrode coated with a slurry layer on both surfaces of a carbon fiber current collector layer, respectively, and the carbon fiber current collector layer has an area extending outward as compared to the slurry layer.

Inventors

• Song Yuanji

Assignees

• 现代自动车株式会社
• 起亚株式会社

Dates

Publication Date

20260508

Application Date

20250710

Priority Date

20241107

Claims (20)

1. 1. A structural battery for a vehicle, comprising: A plurality of positive electrode layers; A plurality of electrolyte layers, and A plurality of the negative electrode layers are arranged on the substrate, Wherein the plurality of positive electrode layers, the plurality of electrolyte layers and the plurality of negative electrode layers are sequentially laminated from top to bottom; Wherein each of the plurality of positive electrode layers and each of the plurality of negative electrode layers respectively include a positive electrode and a negative electrode coated with a slurry layer on both surfaces of a carbon fiber current collector layer; wherein the carbon fiber current collector layer has an outwardly extending carbon fiber current collector layer region as compared to the slurry layer.
2. 2. The structural battery according to claim 1, wherein edge portions of each of the plurality of positive electrode layers, each of the plurality of electrolyte layers, and each of the plurality of negative electrode layers are impregnated with resin and sealed.
3. 3. The structural battery of claim 1, wherein each of the plurality of positive electrode layers and each of the plurality of negative electrode layers comprises a fiberglass insulation layer having a fiberglass insulation layer region that extends outward compared to the carbon fiber current collector layer at an edge location of the plurality of positive electrode layers and the plurality of negative electrode layers.
4. 4. The structural battery according to claim 3, wherein an inner portion of the glass fiber insulating layer is attached to a carbon fiber current collector layer edge portion of the carbon fiber current collector layer by a resin material.
5. 5. The structural battery according to claim 1, wherein the positive electrode comprises a positive electrode slurry layer coated on both surfaces of the respective carbon fiber current collector layers, and Wherein the anode includes anode slurry layers coated on both surfaces of the respective carbon fiber current collector layers.
6. 6. The structural battery of claim 5, wherein the positive electrode slurry layer comprises a positive electrode active material, a first binder, and a first conductive agent, and Wherein the negative electrode slurry layer includes a negative electrode active material, a second binder, and a second conductive agent.
7. 7. The structural battery of claim 1, further comprising: And a carbon fiber structure reinforcing layer laminated on the outer side of each of the uppermost layer and the lowermost layer.
8. 8. The structural battery of claim 7, further comprising: soft envelopes laminated between the carbon fiber structural reinforcement layer and each of the uppermost layer and the lowermost layer, respectively.
9. 9. The structural battery of claim 1, wherein the plurality of positive electrode layers and the plurality of negative electrode layers are located on the same plane.
10. 10. The structural battery according to claim 9, wherein the plurality of first glass fiber insulation layers of the plurality of positive electrode layers and the plurality of second glass fiber insulation layers of the plurality of negative electrode layers are respectively arranged face-to-face and connected on the same plane.
11. 11. The structural battery according to claim 10, wherein first connection sites of the plurality of first glass fiber insulation layers of the plurality of positive electrode layers and second connection sites of the plurality of second glass fiber insulation layers of the plurality of negative electrode layers are arranged offset in the up-down direction.
12. 12. The structural battery of claim 1, wherein the plurality of positive electrode layers and the plurality of negative electrode layers are provided in a plurality on different planes.
13. 13. The structural battery of claim 12, wherein the plurality of first fiberglass insulation layers of the plurality of positive electrode layers and the plurality of second fiberglass insulation layers of the plurality of negative electrode layers are arranged to overlap one another.
14. 14. The structural battery of claim 13, wherein the plurality of first fiberglass insulation layers of the plurality of positive electrode layers and the plurality of second fiberglass insulation layers of the plurality of negative electrode layers are bonded in an engaged shape by compression heat fusion.
15. 15. The structural battery according to claim 13, wherein the plurality of positive electrode layers and the plurality of negative electrode layers are alternately arranged one above the other and bonded.
16. 16. A structural battery for a vehicle, comprising: positive electrode layer, including the positive electrode, wherein, the positive electrode includes: a positive carbon fiber current collector layer; a first positive electrode slurry layer on the first positive electrode carbon fiber current collector layer side of the positive electrode carbon fiber current collector layer, and A second positive electrode slurry layer on a second positive electrode carbon fiber current collector layer side of the positive electrode carbon fiber current collector layer, wherein the first positive electrode carbon fiber current collector layer side is opposite to the second positive electrode carbon fiber current collector layer side, wherein the positive electrode carbon fiber current collector layer comprises an outer positive electrode carbon fiber current collector layer region extending outwardly compared to the first positive electrode slurry layer and the second positive electrode slurry layer; A negative electrode layer comprising a negative electrode, wherein the negative electrode comprises: a negative carbon fiber current collector layer; A first negative electrode slurry layer on the first negative electrode carbon fiber current collector layer side of the negative electrode carbon fiber current collector layer, and A second anode slurry layer on a second anode carbon fiber current collector layer side of the anode carbon fiber current collector layer, wherein the first anode carbon fiber current collector layer side is opposite to the second anode carbon fiber current collector layer side, wherein the anode carbon fiber current collector layer comprises an outer anode carbon fiber current collector layer region extending outwardly compared to the first anode slurry layer and the second anode slurry layer, and And an electrolyte layer positioned between and in electrical contact with the second positive electrode slurry layer and the first negative electrode slurry layer.
17. 17. The structural battery of claim 16, wherein the positive electrode layer further comprises a first fiberglass insulation layer framing the positive electrode and attached to an outer positive electrode carbon fiber current collector layer region of the positive electrode carbon fiber current collector layer such that the first fiberglass insulation layer comprises an outer first fiberglass insulation layer region extending outwardly compared to the positive electrode carbon fiber current collector layer, and The negative electrode layer further includes a second fiberglass insulation layer framing the negative electrode and attached to an outer negative electrode carbon fiber current collector layer region of the negative electrode carbon fiber current collector layer such that the second fiberglass insulation layer includes an outer second fiberglass insulation layer region extending outwardly compared to the negative electrode carbon fiber current collector layer.
18. 18. The structural battery of claim 16, wherein the first positive electrode slurry layer and the second positive electrode slurry layer each comprise a positive electrode active material, a first binder, and a first conductive agent; Wherein the first anode slurry layer and the second anode slurry layer each include an anode active material, a second binder, and a second conductive agent.
19. 19. A structural battery for a vehicle, comprising: a plurality of positive electrode layers, wherein each of the plurality of positive electrode layers comprises a positive electrode, wherein the positive electrode comprises: a positive carbon fiber current collector layer; a first positive electrode slurry layer on the first positive electrode carbon fiber current collector layer side of the positive electrode carbon fiber current collector layer, and A second positive electrode slurry layer on a second positive electrode carbon fiber current collector layer side of the positive electrode carbon fiber current collector layer, wherein the first positive electrode carbon fiber current collector layer side is opposite to the second positive electrode carbon fiber current collector layer side, wherein the positive electrode carbon fiber current collector layer comprises an outer positive electrode carbon fiber current collector layer region extending outwardly compared to the first positive electrode slurry layer and the second positive electrode slurry layer; A plurality of anode layers, wherein each of the plurality of anode layers comprises an anode, wherein the anode comprises: a negative carbon fiber current collector layer; A first negative electrode slurry layer on the first negative electrode carbon fiber current collector layer side of the negative electrode carbon fiber current collector layer, and A second anode slurry layer on a second anode carbon fiber current collector layer side of the anode carbon fiber current collector layer, wherein the first anode carbon fiber current collector layer side is opposite to the second anode carbon fiber current collector layer side, wherein the anode carbon fiber current collector layer comprises an outer anode carbon fiber current collector layer region extending outwardly compared to the first anode slurry layer and the second anode slurry layer, and A plurality of electrolyte layers sandwiching the plurality of positive electrode layers and the plurality of negative electrode layers in such a manner that the plurality of positive electrode layers and the plurality of negative electrode layers are placed in an alternating up-and-down stacking order with respect to the plurality of electrolyte layers such that, for a given positive electrode layer of the plurality of positive electrode layers, a given electrolyte layer of the plurality of electrolyte layers, and a given negative electrode layer of the plurality of negative electrode layers stacked in a first up-and-down order group, the given electrolyte layer of the plurality of electrolyte layers is located between and in electrical contact with a second positive electrode slurry layer of the given positive electrode layer of the plurality of positive electrode layers and a first negative electrode slurry layer of the given negative electrode layer of the plurality of negative electrode layers.
20. 20. The structural battery of claim 19, further comprising: an upper soft coating layer laminated on an uppermost layer of the plurality of electrolyte layers; an upper carbon fiber structural reinforcement layer laminated on the upper soft envelope; a lower soft coating layer laminated on the lowermost layer of the plurality of electrolyte layers, and And a lower carbon fiber structure reinforcing layer laminated on the lower soft envelope.

Description

Structural battery for vehicle Technical Field The present disclosure relates to a structural battery for a vehicle. Background In general, lithium ion batteries mounted on electric vehicles account for a significant portion of the weight of the electric vehicle, but do not perform any load bearing function at all. In contrast, as shown in fig. 1, the structural battery 500 is a component mounted in a frame or structure 800 constituting the electric vehicle 1000, while performing its own load carrying function and charge-discharge and voltage-boosting functions of the high-voltage battery 600 mounted on the vehicle body floor 700. In other words, the structural battery 500 may function as a battery while performing the structural functions of the electric vehicle. Such a battery is also referred to as a mass-free energy storage device because the weight of the battery storing energy is almost nonexistent when the weight of the battery becomes part of the load carrying structure. These composite function batteries can significantly reduce the weight of the vehicle. When the structural battery is applied to an electric vehicle, the weight is reduced, and the endurance mileage can be improved. In addition, the capacity of the structural battery is about 20% of the capacity of the lithium ion battery, which is lower than the capacity of the lithium ion battery, but the weight is significantly reduced due to the absence of a separate battery, so that the energy required to drive the electric vehicle is reduced. In addition, the structural battery has lower electric energy density and higher stability. However, as shown in fig. 2, the general pouch battery of the related art has a structure in which a positive electrode 10 including a positive electrode slurry 12 and an aluminum current collector 14 and a negative electrode 20 including a negative electrode slurry 22 and an aluminum current collector 24 are laminated with a separator 30 interposed therebetween, and a pouch film 40 is attached to the outermost portion. The problem with this construction is that the mechanical rigidity and durability are weak because the separator 30 is used for insulation between the current collectors 14 and 24. Accordingly, a structure for enhancing a rigid function by applying a solid electrolyte layer instead of a separator has been recently developed. In addition, a structural battery has been developed that can improve mechanical rigidity and insulation function by laminating a glass fiber prepreg insulator outside the battery and forming a sealed region impregnated with resin. Therefore, there is a need for continuous research and development of structural batteries applied to vehicles. Disclosure of Invention The present disclosure relates to a structural battery for a vehicle, and more particularly, to a structural battery for an electric vehicle that can be applied as a vehicle body member to mechanically connect members while being electrochemically connected with a lithium ion battery to boost pressure. Embodiments of the present disclosure may provide a structural battery for an electric vehicle, in which, in a structural battery having a series connection structure, a carbon fiber current collector whose region extends beyond an electrolyte may be provided, a resin impregnation region may be formed outside the extended current collector to have an inter-electrode integrated structure, and an extended reinforcing structure may be realized by intra/inter layer bonding of electrodes. According to example embodiments of the present disclosure, a structural battery for an electric vehicle may include a plurality of positive electrode layers, a plurality of electrolyte layers, and a plurality of negative electrode layers, which may be sequentially stacked from top to bottom, wherein each of the positive electrode layers and the negative electrode layers may include a positive electrode and a negative electrode each coated with a slurry layer on both surfaces of a carbon fiber current collector layer, and the carbon fiber current collector layer may have a region extending more outward than the slurry layer. The edge portions of the positive electrode layer, the electrolyte layer, and the negative electrode layer may be impregnated with resin and sealed. At the edges of the positive electrode layer and the negative electrode layer, glass fiber insulation layers may be provided, respectively, the regions of which extend more outwardly than the carbon fiber current collector layer. The inner portion of the glass fiber insulation layer may be attached to the edge portion of the carbon fiber current collector layer by a resin material. The positive electrode may be formed by coating a positive electrode slurry layer on both surfaces of the corresponding carbon fiber current collector layer, and the negative electrode may be formed by coating a negative electrode slurry layer on both surfaces of the corresponding carbon fiber cu