Body components with charging and discharging functions

Abstract

The present invention relates to a vehicle body member having a charging and discharging function, the vehicle body member comprising: a first battery cell including a first negative electrode portion and a first positive electrode portion arranged to be in contact with a first surface of the first negative electrode portion, the first negative electrode portion including carbon fibers, and the first positive electrode portion including a first positive electrode active material and a first solid electrolyte, wherein at least one first through hole penetrates the first negative electrode portion and the first positive electrode portion; a second battery cell including a second negative electrode portion and a second positive electrode portion arranged to be in contact with a first surface of the second negative electrode portion, the second negative electrode portion including carbon fibers, and the second positive electrode portion including a second positive electrode active material and a second solid electrolyte; a reinforcing insulating layer formed into a honeycomb structure and having two opposite surfaces, each surface having at least one insertion protrusion inserted into each of the first through hole and the second through hole, respectively; a first positive electrode collector; a second positive electrode collector; a first negative electrode collector; and a second negative electrode collector.

Description

Technical Field

[0001] The invention relates to a vehicle body component with charging and discharging functions. Background Art

[0002] Traditionally, the use of steel to manufacture vehicle body structures and various components has been common, but recently composite materials such as fiber-reinforced resin composites have been used to replace steel in order to improve fuel efficiency by reducing weight.

[0003] Generally speaking, a fiber-reinforced resin composite material has a basic structure consisting of a reinforcing material and a base material, the reinforcing material plays a role in the load applied to the material, and the base material is combined with the reinforcing material to realize the overall shape of the material and transfer the load applied to the material to the reinforcing material. Here, a fiber-type reinforcing material such as carbon fiber, glass fiber and aramid fiber is generally used as the reinforcing material, and a resin-based material such as a thermosetting resin including a phenolic resin, an epoxy resin, etc., or a thermoplastic resin including polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), etc. is used as the base material.

[0004] Meanwhile, many components constituting a vehicle are electronic equipment devices that are operated by power supplied by a battery. In recent years, due to the increase in electronic equipment devices, research on increasing the battery capacity in a vehicle has been ongoing.

[0005] The foregoing content is only intended to help understand the background of the present invention, and is not intended to indicate that the present invention falls within the scope of the relevant technologies known to those skilled in the art. Summary of the invention

[0006] The present invention relates to a vehicle body component with charging and discharging functions. A specific embodiment relates to a vehicle body component with charging and discharging functions, in which carbon fibers are used for the purpose of weight reduction and reinforcement.

[0007] The embodiments of the present invention utilize the fact that carbon fiber used as a reinforcing material of a fiber-reinforced resin composite material can be used as a negative electrode constituting a secondary battery, and provide a rear beam for a vehicle that can be charged and discharged by utilizing a reinforcing material for reducing the weight of the vehicle and enhancing the strength.

[0008] Therefore, an embodiment of the present invention has been proposed in view of the problems arising in the prior art, and an embodiment of the present invention provides a vehicle body member having a charging and discharging function, in which carbon fiber used as a reinforcing material in a roof panel and a roof rail of a vehicle body is used as a negative electrode of a secondary battery.

[0009] According to one embodiment of the present invention, there is provided a vehicle body component with charging and discharging functions, the vehicle body component serving as a roof component of a vehicle body, comprising: a first battery unit, comprising a first negative electrode portion and a first positive electrode portion arranged to contact a first surface of the first negative electrode portion, the first negative electrode portion comprising carbon fiber, and the first positive electrode portion comprising a positive electrode active material and a solid electrolyte, wherein at least one first through hole penetrates the first negative electrode portion and the first positive electrode portion; a second battery unit, comprising a second negative electrode portion and a second positive electrode portion arranged to contact a second surface of the second negative electrode portion, the second negative electrode portion comprising carbon fiber, and the second positive electrode portion comprising a positive electrode active material and a solid electrolyte, wherein at least one second through hole penetrates the second negative electrode portion and the second positive electrode portion; a reinforcing insulating layer , formed into a honeycomb structure and having two opposite surfaces, each of the two opposite surfaces having at least one insertion protrusion inserted into each of the first through hole and the second through hole, respectively, and a reinforced insulating layer is located between the first surface of the first battery cell and the second surface of the second battery cell so that the first battery cell and the second battery cell are electrically insulated from each other; a first positive electrode collector, connected to the first positive electrode portion of the first battery cell; a second positive electrode collector, connected to the second positive electrode portion of the second battery cell and connected in parallel with the first positive electrode collector; a first negative electrode collector, connected to the first negative electrode portion of the first battery cell; and a second negative electrode collector, connected to the second negative electrode portion of the second battery cell and connected in parallel with the first negative electrode collector.

[0010] A first negative electrode collector is stacked on a second surface of the first battery cell; a second negative electrode collector is stacked on a first surface of the second battery cell; and a surface layer made of the composite material is stacked on each of the second surface of the first negative electrode collector and the first surface of the second negative electrode collector.

[0011] The skin layer may be made of glass fiber reinforced sheets.

[0012] The insertion protrusions of the surface layer and the reinforced insulating layer are directly bonded to each other.

[0013] The insertion protrusions of the surface layer and the reinforced insulating layer are directly bonded to each other around the bonding area; an overlapping area can be formed around the bonding area, wherein the first battery cell, the second battery cell, the first negative electrode collector and the second negative electrode collector are deformed by press molding in the overlapping area to be compressed.

[0014] The reinforcing insulating layer may be made of a plastic polymer; and in the bonding region, the skin layer and the reinforcing insulating layer are bonded to each other by an adhesive, or a resin forming the skin layer and a resin forming the reinforcing insulating layer are melted and bonded to each other.

[0015] Each of the first negative electrode portion and the second negative electrode portion is formed by stacking a plurality of reinforcing fiber sheets whose carbon fibers are arranged in different directions.

[0016] The first positive electrode portion includes: a first positive electrode layer, which is opposite to the first surface of the first negative electrode portion and in which a positive electrode active material is distributed; and a first solid electrolyte layer, which is made of a first solid electrolyte and is arranged between the first negative electrode portion and the first positive electrode layer to contact each of the first negative electrode portion and the first positive electrode layer; the second positive electrode portion includes: a second positive electrode layer, which is opposite to the second surface of the second negative electrode portion and in which a positive electrode active material is distributed; and a second solid electrolyte layer, which is made of a solid electrolyte and is arranged between the second negative electrode portion and the second positive electrode layer to contact each of the second negative electrode portion and the second positive electrode layer; and the first positive electrode layer and the second positive electrode layer are electrically insulated from each other by a reinforced insulating layer.

[0017] A plurality of roof members may be provided; a first positive collector and a second positive collector constituting each roof member are connected in parallel to each other; a first negative collector and a second negative collector constituting each roof member are connected in parallel to each other; and the first positive collector, the second positive collector, the first negative collector, and the second negative collector are selectively connected to an AC generator or an electronic device of the vehicle through a switch. While the first positive collector, the second positive collector, the first negative collector, and the second negative collector are electrically connected to the AC generator of the vehicle, charging is performed through the plurality of roof members; and while the first positive collector, the second positive collector, the first negative collector, and the second negative collector are connected to the electronic device of the vehicle, power generated by discharging through the plurality of roof members is provided to the electronic device of the vehicle.

[0018] The plurality of roof members are configured such that at least one of the plurality of roof members forms a roof panel of the vehicle and the remaining roof members form roof rails of the vehicle.

[0019] According to an embodiment of the present invention, carbon fiber used to increase the rigidity of a roof panel and a roof rail of a vehicle body is used as a negative electrode of a secondary battery, and each of the roof panel and the roof rail is equipped with a device serving as a solid electrolyte and a positive electrode, thereby being expected to increase the effect of the secondary battery function capable of charging and discharging the roof panel and the roof rail.

[0020] In addition, each of the roof panel and the roof rail is manufactured as a secondary battery capable of charge and discharge, and the respective roof panels and the roof rails are connected in parallel to each other. Thus, it can be expected that there is an effect of increasing the capacity of the secondary battery.

[0021] In addition, by configuring a reinforced insulating layer having a honeycomb structure with insertion protrusions between the first battery cell and the second battery cell having through holes, the effect of improving interlayer shear strength due to the insertion of the insertion protrusions into the through holes can be expected, while improving rigidity due to the honeycomb structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and other advantages of the present invention will be more clearly understood through the following detailed description in conjunction with the accompanying drawings, in which:

[0023] Figure 1 is a view showing a vehicle using a vehicle body member having a charging and discharging function according to an embodiment of the present invention;

[0024] Figure 2A and Figure 2B is a cross-sectional view showing a vehicle body member having charging and discharging functions according to an embodiment of the present invention;

[0025] FIG. 3A to FIG. 3C A perspective view and an enlarged perspective view of a main part respectively showing a vehicle body member having charging and discharging functions according to an embodiment of the present invention;

[0026] FIG. 4A to FIG. 4C A perspective view and an enlarged perspective view of main components constituting a vehicle body member having charging and discharging functions according to an embodiment of the present invention, respectively; and

[0027] Figure 5 is a circuit diagram showing a vehicle body member having charging and discharging functions according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and the embodiments of the present invention are presented in order to fully disclose the present invention and help those of ordinary skill in the art to best understand the invention. Throughout the different drawings, the same reference numerals are used to represent the same or similar components.

[0029] Figure 1 is a view showing a vehicle using a vehicle body member having a charging and discharging function according to an embodiment of the present invention, Figure 2A and Figure 2B is a cross-sectional view showing a vehicle body member having a charging and discharging function according to an embodiment of the present invention, FIG. 3A to FIG. 3C A perspective view and an enlarged perspective view of a main part respectively show a vehicle body member having charging and discharging functions according to an embodiment of the present invention, FIG. 4A to FIG. 4C A perspective view and an enlarged perspective view of a main part of a vehicle body member having charging and discharging functions according to an embodiment of the present invention are respectively shown, and Figure 5 is a circuit diagram showing a vehicle body member having charging and discharging functions according to an embodiment of the present invention.

[0030] Here, Figure 2Ais a cross-sectional view showing the state before each component is press-formed after being stacked, and Figure 2B is a cross-sectional view showing the state after the individual components are press-formed after being stacked. Figure 3B It is shown Figure 3A An enlarged view of portion "V1" is shown in FIG. Figure 3C It is shown Figure 3A An enlarged view of portion “V2” is shown in FIG. Figure 4A is a view showing a first battery cell, Figure 4B is a view showing a reinforced insulating layer, and Figure 4C is a view showing a second battery unit.

[0031] First, the vehicle body component with charging and discharging functions according to the embodiment of the present invention can be applied to various parts of a vehicle. Hereinafter, as an example of the vehicle body component, the roof component of the vehicle body, that is, the roof panel and the roof rails will be described as an example.

[0032] As shown in the figure, the vehicle body member with charging and discharging functions according to the embodiment of the present invention is provided as a plurality of vehicle body members, which are configured such that at least one vehicle body member forms the roof panel 20 of the vehicle body 10, and the remaining vehicle body members form the roof rails 30 of the vehicle body 10. Here, the respective vehicle body members 20 and 30 constituting the roof panel 20 and the roof rails 30 function as secondary batteries with charging and discharging functions.

[0033] To this end, each of the vehicle body members 20 and 30 includes a first battery cell 100 , a second battery cell 200 , a reinforced insulating layer 300 , a surface layer 400 , a positive electrode collector 500 , and a negative electrode collector 600 .

[0034] The first battery cell 100 is a device for forming a unit battery, and is composed of a first negative electrode portion 110 and a first positive electrode portion 120, wherein the first negative electrode portion 110 includes carbon fiber, and the first positive electrode portion 120 is arranged to contact with a first surface of the first negative electrode portion 110 and is formed to include a positive electrode active material and a solid electrolyte.

[0035] Here, the first negative electrode portion 110 is a reinforcing means for improving rigidity while realizing the shapes of the roof panel 20 and the roof rail 30. In the present embodiment, the first negative electrode portion 110 also serves as a negative electrode that performs charging and discharging functions. To this end, the first negative electrode portion 110 is made of a composite material including carbon fibers made of a carbon material that facilitates oxidation and reduction of lithium ions.

[0036] Here, in order to improve rigidity, the first battery unit 100 may be provided by stacking a plurality of reinforcing fiber sheets arranged in different arrangement directions.

[0037] The first positive electrode unit 120 is a device for performing the role of a solid separator and the role of a positive electrode for performing charging and discharging functions, and can be implemented by including a positive electrode active material used as a positive electrode in a conventional secondary battery. For example, the first positive electrode unit 120 may include a lithium metal oxide. In addition, the first positive electrode unit 120 may be implemented by using a material used as a solid electrolyte, i.e., a solid electrolyte in a conventional secondary battery.

[0038] For example, the first positive electrode portion 120 may include a first positive electrode layer 121 disposed opposite to the first surface of the first negative electrode portion 110 and having a positive electrode active material distributed therein, and a first solid electrolyte layer 122 made of a solid electrolyte and disposed between the first negative electrode portion 110 and the first positive electrode layer 121 to contact each of the first negative electrode portion 110 and the first positive electrode layer 121. Here, a first separator 123 that separates the first negative electrode portion 110 and the first positive electrode layer 121 from each other may also be inserted between the respective first solid electrolyte layers 122.

[0039] Meanwhile, at least one first through hole 101 penetrating the first negative electrode portion 110 and the first positive electrode portion 120 is formed in the first battery cell 100. In detail, the first battery cell 100 is configured such that the first through hole 101 is formed to sequentially penetrate the first negative electrode portion 110, the first solid electrolyte layer 122 having the first separator 123 interposed therebetween, and the first positive electrode layer 121.

[0040] In addition, the second battery cell 200 is also a device for forming a unit battery, and is composed of a second negative electrode portion 210 and a second positive electrode portion 220, wherein the second negative electrode portion 210 includes carbon fiber, and the second positive electrode portion 220 is configured to contact the second surface of the second negative electrode portion 210, and is formed to include a positive electrode active material and a solid electrolyte.

[0041] Here, the second negative electrode portion 210 is a reinforcing means for improving rigidity while realizing the shapes of the roof panel 20 and the roof rail 30. In the present embodiment, the second negative electrode portion 210 also serves as a negative electrode that performs charging and discharging functions. To this end, the second negative electrode portion 210 is made of a composite material including carbon fibers made of a carbon material that facilitates oxidation and reduction of lithium ions.

[0042] Here, in order to improve the rigidity, the second battery unit 200 may also be arranged by stacking a plurality of reinforcing fiber sheets arranged in different arrangement directions to enhance the rigidity.

[0043] The second positive electrode portion 220 is a device for performing the role of a solid separator and the role of a positive electrode for performing charging and discharging functions, and can be implemented by including a positive electrode active material used as a positive electrode in a conventional secondary battery. For example, the second positive electrode portion 220 may include a lithium metal oxide. In addition, the second positive electrode portion 220 may be implemented by using a material used as a solid electrolyte, i.e., a solid electrolyte in a conventional secondary battery.

[0044] For example, the second positive electrode portion 220 may include a second positive electrode layer 221 and a second solid electrolyte layer 222, the second positive electrode layer 221 being disposed opposite to the second surface of the second negative electrode portion 210 and having a positive electrode active material distributed therein, and the second solid electrolyte layer 222 being made of a solid electrolyte and disposed between the second negative electrode portion 210 and the second positive electrode layer 221 so as to be in contact with each of the second negative electrode portion 210 and the second positive electrode layer 221. Here, the second separator 223, which separates the second negative electrode portion 210 and the second positive electrode layer 221 from each other, may also be inserted between the respective second solid electrolyte layers 222.

[0045] In addition, at least one second through hole 201 may be formed in the second battery cell 200, which passes through the second negative electrode portion 210 and the second positive electrode portion 220 in a predetermined region. In detail, the second battery cell 200 is configured such that the second through hole 201 is formed to sequentially pass through the second negative electrode portion 210, the second solid electrolyte layer 222 with the second separator 223 interposed therebetween, and the second positive electrode layer 221.

[0046] Here, preferably, the second through hole 201 is formed at a position corresponding to a position where the first through hole 101 is formed, so that the first through hole 101 and the second through hole 201 communicate with each other.

[0047] Furthermore, the reinforced insulating layer 300 is disposed between the first and second positive electrode layers 121 and 221 to electrically insulate the first and second positive electrode layers 121 and 221 from each other. Therefore, the first and second battery cells 100 and 200 are arranged symmetrically with respect to the reinforced insulating layer 300 .

[0048] The reinforced insulating layer 300 serves to electrically insulate the first battery cell 100 and the second battery cell 200 from each other while maintaining the first battery cell 100 and the second battery cell 200 structurally strong. To this end, the reinforced insulating layer 300 is formed in a plate shape having a honeycomb structure.

[0049] In addition, the reinforced insulating layer 300 has two opposite surfaces, each of which has at least one insertion protrusion 310 inserted into each of the first through hole 101 and the second through hole 201. For example, a first insertion protrusion 311 inserted into the first through hole 101 may be formed on the second surface of the reinforced insulating layer 300 facing the first battery cell 100, and a second insertion protrusion 312 inserted into the second through hole 201 may be formed on the first surface of the reinforced insulating layer 300 facing the second battery cell 200.

[0050] Meanwhile, in the present embodiment, the first unit battery cell 100 and the second unit battery cell 200 respectively constituting one unit battery are electrically connected to each other in parallel to increase the charge / discharge capacity.

[0051] To this end, a first positive electrode collector 500a connected to the first positive electrode portion 120 of the first battery cell 100 is provided, and a second positive electrode collector 500b connected to the second positive electrode portion 220 of the second battery cell 200 is provided so that the first positive electrode collector 500a and the second positive electrode collector 500b are connected in parallel to each other.

[0052] Furthermore, a first negative electrode collector 600a connected to the first negative electrode portion 110 of the first battery cell 100 and a second negative electrode collector 600b connected to the second negative electrode portion 210 of the second battery cell 200 are provided so that the first negative electrode collector 600a and the second negative electrode collector 600b are connected in parallel to each other.

[0053] Here, preferably, the first positive electrode collector 500a and the first negative electrode collector 600a are configured so that the first through hole 101 formed in the first battery cell 100 passes therethrough, and the second positive electrode collector 500b and the second negative electrode collector 600b are configured so that the second through hole 201 formed in the second battery cell 200 passes therethrough.

[0054] Meanwhile, the skin layer 400 is stacked on the outermost layer of each of the body members 20 and 30 to electrically insulate the body members 20 and 30 from other body members 20 and 30 while stably maintaining the stacking structure of the components constituting the body members 20 and 30 .

[0055] For example, the first skin layer 410 is stacked on the second surface of the first negative electrode collector 600 a , and the second skin layer 420 is stacked on the first surface of the second negative electrode collector 600 b .

[0056] Here, the first skin layer 410 and the second skin layer 420 are preferably made of a glass fiber reinforced sheet made of non-conductive glass fiber and resin.

[0057] Meanwhile, preferably, the surface layer 400 and the insertion protrusion 310 of the reinforced insulating layer 300 are directly bonded to each other. For example, the first insertion protrusion 310 of the reinforced insulating layer 300 may pass through the first through hole 101, and its end portion is directly bonded to the first surface layer 410, and the second insertion protrusion 320 of the reinforced insulating layer 300 may pass through the second through hole 201, and its end portion is directly bonded to the second surface layer 420. Here, the area where the surface layer 400 and the insertion protrusion 310 of the reinforced insulating layer 300 are directly bonded to each other is referred to as a bonding area A1.

[0058] Therefore, in the adhesion region A1, the skin layer 400 and the reinforced insulating layer 300 may be adhered to each other by an adhesive.

[0059] In addition, in order to improve the stacking strength of each of the vehicle body members 20 and 30, the first battery cell 100, the second battery cell 200, the reinforced insulating layer 300, the surface layer 400, the positive electrode collector 500 and the negative electrode collector 600 may be formed by hot pressing (see Figure 2B ).

[0060] Here, in the adhesion region A1 , the resin forming the skin layer 400 and the resin forming the reinforced insulating layer 300 may be melted and adhered to each other.

[0061] In addition, an overlapping area A2 is formed around the bonding area A1, in which the first battery cell 100, the second battery cell 200, the first negative electrode collector 600a, and the second negative electrode collector 600b are deformed by compression molding to be compressed. In the overlapping area A2, the first negative electrode collector 600a and the second negative electrode collector 600b are deformed in a shape inclined in the direction of the bonding area A1, and due to the deformation, the stacking strength of the vehicle body members 20 and 30 is improved, and the shear strength is also improved.

[0062] Meanwhile, the vehicle body members 20 and 30 of the vehicle body 10 generally include a roof panel 20 and a plurality of roof rails 30 .

[0063] Therefore, if Figure 5 As shown, when the vehicle body members 20 and 30 are composed of one roof panel 20 and a plurality of roof rails 30, the first positive electrode collector 500a and the second positive electrode collector 500b constituting the roof panel 20 are connected in parallel to each other, and the first negative electrode collector 600a and the second negative electrode collector 600b are connected in parallel to each other. In addition, the first positive electrode collectors 500a constituting the respective roof rails 30 are connected in parallel to each other, the first negative electrode collectors 600a are connected in parallel to each other, the second positive electrode collectors 500b are connected in parallel to each other, and the second negative electrode collectors 600b are connected in parallel to each other.

[0064] The first positive electrode collector 500 a , the second positive electrode collector 500 b , the first negative electrode collector 600 a , and the second negative electrode collector 600 b constructed as described above are selectively connected to the alternator 1 or the electronic device 2 of the vehicle through the switch 3 .

[0065] Therefore, while the first positive electrode collector 500 a , the second positive electrode collector 500 b , the first negative electrode collector 600 a , and the second negative electrode collector 600 b are electrically connected to the alternator 1 of the vehicle, charging is performed through the roof panel 20 and the roof rail 30 .

[0066] Furthermore, while the first positive collector 500a, the second positive collector 500b, the first negative collector 600a and the second negative collector 600b are connected to the electronic device 2 of the vehicle, the power discharged through the roof panel 20 and the roof rail 30 is supplied to the electronic device 2 of the vehicle.

[0067] Here, the electronic device 2 represents a component located in the vehicle and operated by supplying power. For example, various lamps such as a room lamp located inside the vehicle can be used.

[0068] In addition, the vehicle body member composed of the roof panel 20 and the plurality of roof rails 30 is configured such that the plurality of roof rails 30 are arranged at equal intervals from each other due to the structure of the vehicle body 10, and the roof panel 20 is arranged on top thereof. Here, the plurality of roof rails 30 and the roof panel 20 are electrically insulated from each other by the skin layer 400.

[0069] Although the present invention has been described with reference to the accompanying drawings and the above exemplary embodiments, the scope of the present invention should not be limited to the described embodiments, but should be determined by the appended claims and their equivalents. Therefore, it will be understood by those skilled in the art that various modifications, additions and substitutions may be made without departing from the scope and spirit of the present invention disclosed in the appended claims.

Claims

1. A vehicle body component having charging and discharging functions, the vehicle body component comprising: a first battery cell, comprising a first negative electrode portion and a first positive electrode portion disposed in contact with a first surface of the first negative electrode portion, the first negative electrode portion comprising carbon fibers, and the first positive electrode portion comprising a first positive electrode active material and a first solid electrolyte, wherein at least one first through hole penetrates the first negative electrode portion and the first positive electrode portion; a second battery cell including a second negative electrode portion and a second positive electrode portion disposed in contact with a first surface of the second negative electrode portion, the second negative electrode portion including carbon fibers, and the second positive electrode portion including a second positive electrode active material and a second solid electrolyte, wherein at least one second through hole penetrates the second negative electrode portion and the second positive electrode portion; a reinforced insulating layer formed in a honeycomb structure and having two opposite surfaces, each of the two opposite surfaces having at least one insertion protrusion inserted into each of the first through hole and the second through hole, the reinforced insulating layer being located between a first surface of the first battery cell and a second surface of the second battery cell so that the first battery cell and the second battery cell are electrically insulated from each other; a first positive electrode current collector connected to a first positive electrode portion of the first battery cell; a second positive electrode collector connected to the second positive electrode portion of the second battery cell and connected in parallel with the first positive electrode collector; a first negative electrode current collector connected to a first negative electrode portion of the first battery cell; and A second negative electrode collector is connected to the second negative electrode portion of the second battery cell and is connected in parallel with the first negative electrode collector.

2. The vehicle body member according to claim 1, wherein: The first negative electrode collector is stacked on the second surface of the first battery cell; The second negative electrode collector is stacked on the first surface of the second battery cell; and A surface layer made of a composite material is stacked on each of the second surface of the first negative electrode collector and the first surface of the second negative electrode collector.

3. The vehicle body member according to claim 2, wherein: The skin layer includes a glass fiber reinforced sheet.

4. The vehicle body member according to claim 2, wherein: The surface layer and the insertion protrusions of the reinforced insulating layer are directly bonded to each other.

5. The vehicle body member according to claim 4, further comprising: a bonding region at which the insertion protrusions of the surface layer and the reinforced insulating layer are directly bonded to each other; as well as an overlapping region around the adhesion region, wherein the first battery cell, the second battery cell, the first negative electrode collector, and the second negative electrode collector are deformed by press molding in the overlapping region to be compressed.

6. The vehicle body member according to claim 5, wherein: The reinforced insulation layer comprises a plastic polymer; and In the bonding region, the surface layer and the reinforced insulating layer are bonded to each other by an adhesive.

7. The vehicle body member according to claim 5, wherein: The reinforced insulation layer comprises a plastic polymer; and In the bonding region, the resin forming the surface layer and the resin forming the reinforcing insulating layer are melted and bonded to each other.

8. The vehicle body member according to claim 1, wherein: Each of the first negative electrode portion and the second negative electrode portion is formed by stacking a plurality of reinforcing fiber sheets whose carbon fibers are arranged in different directions.

9. The vehicle body member according to claim 1, wherein: The first positive electrode portion includes: a first positive electrode layer opposite to a first surface of the first negative electrode portion and in which the first positive electrode active material is distributed; and a first solid electrolyte layer made of the first solid electrolyte and arranged between the first negative electrode portion and the first positive electrode layer to contact each of the first negative electrode portion and the first positive electrode layer; The second positive electrode portion includes: a second positive electrode layer that is opposite to the second surface of the second negative electrode portion and in which the second positive electrode active material is distributed; and a second solid electrolyte layer that is made of the second solid electrolyte and is arranged between the second negative electrode portion and the second positive electrode layer to contact each of the second negative electrode portion and the second positive electrode layer; and The first positive electrode layer and the second positive electrode layer are electrically insulated from each other by the reinforced insulating layer.

10. The vehicle body member according to claim 1, wherein: The vehicle body components include a plurality of roof components; A first positive electrode collector and a second positive electrode collector constituting each roof member are connected in parallel to each other; The first negative electrode collector and the second negative electrode collector constituting each roof member are connected in parallel to each other; and The first positive electrode collector, the second positive electrode collector, the first negative electrode collector, and the second negative electrode collector are selectively connected to an alternator or an electronic device of a vehicle through a switch.

11. The vehicle body member according to claim 10, wherein: While the first positive electrode collector, the second positive electrode collector, the first negative electrode collector, and the second negative electrode collector are electrically connected to an alternator of the vehicle, charging is performed through the plurality of roof members; and While the first positive current collector, the second positive current collector, the first negative current collector, and the second negative current collector are connected to electronic equipment of the vehicle, power generated by discharge through the plurality of roof members is supplied to the electronic equipment of the vehicle.

12. The vehicle body member according to claim 10, wherein: The plurality of roof members are configured such that at least one of the plurality of roof members forms a roof panel of the vehicle and at least another one of the plurality of roof members forms a roof rail of the vehicle.

13. A vehicle comprising: Car body; as well as Electronic equipment in the vehicle body; Wherein, the vehicle body includes a roof member electrically connected to the electronic device, and the roof member includes: a first battery cell, comprising a first negative electrode portion and a first positive electrode portion disposed in contact with a first surface of the first negative electrode portion, the first negative electrode portion comprising carbon fibers, and the first positive electrode portion comprising a first positive electrode active material and a first solid electrolyte, wherein at least one first through hole penetrates the first negative electrode portion and the first positive electrode portion; a second battery cell including a second negative electrode portion and a second positive electrode portion disposed in contact with a first surface of the second negative electrode portion, the second negative electrode portion including carbon fibers, and the second positive electrode portion including a second positive electrode active material and a second solid electrolyte, wherein at least one second through hole penetrates the second negative electrode portion and the second positive electrode portion; a reinforced insulating layer formed in a honeycomb structure and having two opposite surfaces, each of the two opposite surfaces having at least one insertion protrusion inserted into each of the first through hole and the second through hole, the reinforced insulating layer being located between a first surface of the first battery cell and a second surface of the second battery cell so that the first battery cell and the second battery cell are electrically insulated from each other; a first positive electrode current collector connected to a first positive electrode portion of the first battery cell; a second positive electrode collector connected to the second positive electrode portion of the second battery cell and connected in parallel with the first positive electrode collector; a first negative electrode current collector connected to a first negative electrode portion of the first battery cell; and A second negative electrode collector is connected to the second negative electrode portion of the second battery cell and is connected in parallel with the first negative electrode collector.

14. The vehicle of claim 13, wherein: The first negative electrode collector is stacked on the second surface of the first battery cell; The second negative electrode collector is stacked on the first surface of the second battery cell; and A surface layer made of a composite material is stacked on each of the second surface of the first negative electrode collector and the first surface of the second negative electrode collector.

15. The vehicle of claim 14, wherein: The skin layer includes a glass fiber reinforced sheet.

16. The vehicle of claim 14, wherein: The surface layer and the insertion protrusions of the reinforced insulating layer are directly bonded to each other.

17. The vehicle of claim 16, further comprising: a bonding region at which the insertion protrusions of the surface layer and the reinforced insulating layer are directly bonded to each other; as well as an overlapping region around the adhesion region, wherein the first battery cell, the second battery cell, the first negative electrode collector, and the second negative electrode collector are deformed by press molding in the overlapping region to be compressed.

18. The vehicle of claim 17, wherein: The reinforced insulation layer comprises a plastic polymer; and In the bonding region, the skin layer and the reinforcing insulating layer are bonded to each other by an adhesive, or a resin forming the skin layer and a resin forming the reinforcing insulating layer are melted and bonded to each other.

19. The vehicle of claim 13, wherein: Each of the first negative electrode portion and the second negative electrode portion is formed by stacking a plurality of reinforcing fiber sheets whose carbon fibers are arranged in different directions.

20. The vehicle of claim 13, wherein: The first positive electrode portion includes: a first positive electrode layer opposite to a first surface of the first negative electrode portion and in which the first positive electrode active material is distributed; and a first solid electrolyte layer made of the first solid electrolyte and arranged between the first negative electrode portion and the first positive electrode layer to contact each of the first negative electrode portion and the first positive electrode layer; The second positive electrode portion includes: a second positive electrode layer that is opposite to the second surface of the second negative electrode portion and in which the second positive electrode active material is distributed; and a second solid electrolyte layer that is made of the second solid electrolyte and is arranged between the second negative electrode portion and the second positive electrode layer to contact each of the second negative electrode portion and the second positive electrode layer; and The first positive electrode layer and the second positive electrode layer are electrically insulated from each other by the reinforced insulating layer.

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