KR101104154B1 - Second Battery Head Lamp - Google Patents

Abstract

According to an aspect of the present invention, there is provided a head lamp including at least one light source member and a head member installed on both sides of the light source member, wherein the head member is mounted with two or more secondary battery cells electrically connected thereto. Provided is a head lamp having a structure that is continuously mounted laterally so that the mutual electrical connection is bent.

Head lamp according to the present invention by mounting two or more secondary battery cells directly to the head member, to ensure the desired output, to prevent the weight bias phenomenon while suppressing the increase in volume as much as possible, can exhibit a high performance even at subzero temperatures It works.

Description

Secondary Battery Head Lamp

The present invention relates to a head lamp comprising two or more secondary battery cells mounted in an electrically connected state to a head member of a head lamp, wherein the battery cells are continuously mounted side by side to be bendable to each other.

As technology development and demand for mobile devices are increasing, the demand for batteries as energy sources is rapidly increasing, and accordingly, a lot of researches on batteries capable of meeting various demands have been conducted.

Representatively, there is a high demand for rectangular secondary batteries and pouch secondary batteries, which can be applied to products such as mobile phones with a thin thickness in terms of shape of batteries, and lithium ion batteries with high energy density, discharge voltage, and output stability in terms of materials. There is a high demand for lithium secondary batteries such as lithium ion polymer batteries.

On the other hand, headlamps which are widely used in various fields such as outdoor activities such as mountain climbing and fishing or medical diagnosis such as otolaryngology and dentistry generally use primary batteries such as batteries, and thus have various problems. . For example, there are problems such as occurrence of environmental problems and economical efficiency due to single use, low weight, low voltage, and inconsistent output power.

In particular, alkaline or manganese batteries currently on the market have a weak weak point. In other words, when the temperature drops below zero, the lithium secondary battery is only 10-20% of the room temperature, whereas the lithium secondary battery is resistant to cold and has a long life, and thus is more suitable as a head lamp power source.

As a technique to solve this problem, Korean Patent Application Publication No. 2003-0079664, two or more light sources and the light source transfer device, the light source and the light source transfer device for controlling the direction in which the light is shining light, Switchgear which press plate is pressed and electrically connected when worker wears, Wearing part to fix head lamp on worker's head, Charger attached to wearing part and supplying power to each light source A technique is disclosed for a head lamp composed of possible power supplies. However, the above technique has a problem in that the bulky and heavy battery is mounted on the rear side of the wearing part, so that the overall volume of the head lamp is increased, and the weight is biased on one side while being mounted on the head.

Therefore, there is a high need for a head lamp that can be conveniently used by suppressing a volume increase and solving a problem in which weight is biased on one side.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems of the prior art and the technical problems required from the past.

After extensive research and various experiments, the inventors of the present application secure the output of a desired lamp when the two or more battery cells are electrically connected to the head member of the head lamp and the connection part is mounted to be bent. In addition, it is possible to exert excellent operating performance even at sub-zero temperatures, as well as to minimize the increase in volume caused by the mounting of the battery and to solve the weight-biasing problem, thereby confirming the advantages of being very convenient and completing the present invention. .

Accordingly, the head lamp according to the present invention is a head lamp including at least one light source member and a head member respectively installed on both sides of the light source member, wherein the head member is mounted with two or more secondary battery cells electrically connected thereto. The battery cells have a structure in which the battery cells are continuously mounted in the lateral direction so that the electrical connection parts can be bent.

That is, the head lamp according to the present invention is economically effective because two or more secondary battery cells are effectively mounted on the head member, and thus can be expanded to a desired battery capacity, and can be reused as compared to a head lamp using a conventional primary battery. In addition, due to the characteristics of the secondary battery exhibiting high operating performance even at sub-zero temperatures, it can be easily used not only for indoor night work but also for external activities such as night climbing. Furthermore, by mounting the secondary battery cells on the head member itself, it is possible to suppress the increase in volume due to power supply, and the weight is biased on one side because the secondary battery cells are distributed in two or more units and mounted on the head member that is in close contact with the body. Can be solved.

The light source member may be formed of a general incandescent lamp or LED (Light Emitting Diode) that can emit light, and may be configured as a head lamp using two or more light source members according to the intended use.

The head member in which the secondary battery cells are embedded serves as a kind of pack case for sealing after mounting the battery cell in the battery pack, in addition to mounting the light source member to the body.

The headlamp according to the present invention may be worn on a predetermined part of the body as needed, for example, may be worn on the head, chest, belly, wrist, and the like. It is preferable to use a secondary battery cell that is light in weight and thin in thickness as a power source mainly due to the characteristics of a head lamp worn on the head. Accordingly, the battery cell is a plate-shaped battery cell in which the stack type or the stack / fold type electrode assembly is incorporated, and the number of pole plates per battery cell is preferably 10 or less.

In the present specification, a stack type electrode assembly is an electrode assembly in which a plurality of positive and negative electrodes cut in units of a predetermined size are sequentially stacked with a separator therebetween, and the stack / foldable electrode assembly is a unit of positive and negative electrodes. It refers to an electrode assembly having a structure in which bi-cells or full cells are stacked with a separator interposed therebetween.

Accordingly, the secondary battery cell may be a plate-shaped battery cell having a plurality of stackable or stackable / foldable electrode assemblies capable of charging and discharging, and the 'plate-shaped' means a rectangular parallelepiped shape having a relatively large length to width. do.

The number of pole plates constituting the secondary battery cell may be 10 or less as described above in order to make the thickness of the battery cell thin and the weight light, and to suppress the increase in thickness of the head member on which the battery cell is mounted. It is more preferable that it consists of two to four electrode plates so that bending by itself is possible.

In one preferred example, the secondary battery cell may be a lithium secondary battery comprising an electrode assembly consisting of a positive electrode and a negative electrode, and a separator interposed therebetween, and a lithium salt-containing non-aqueous electrolyte.

The positive electrode is prepared by, for example, applying a mixture of a positive electrode active material, a conductive agent, and a binder onto a positive electrode current collector, followed by drying. If necessary, a filler may be further added to the mixture.

The cathode active material may be a layered compound such as lithium cobalt oxide (LiCoO ₂ ), lithium nickel oxide (LiNiO ₂ ), or a compound substituted with one or more transition metals; Li _{1 + x} Mn _{2 - x} O ₄ (Where x is 0 to 0.33), lithium manganese oxides such as LiMnO ₃ , LiMn ₂ O ₃ and LiMnO ₂ ; Lithium copper oxide (Li ₂ CuO ₂ ); Vanadium oxides such as LiV ₃ O ₈ , LiFe ₃ O ₄ , V ₂ O ₅ , Cu ₂ V ₂ O ₇ and the like; Ni-site type lithium nickel oxide represented by the formula LiNi _1-x M _x O ₂ , wherein M = Co, Mn, Al, Cu, Fe, Mg, B, or Ga, and x = 0.01 to 0.3; Formula LiMn _2-x M _x O ₂ (wherein M = Co, Ni, Fe, Cr, Zn or Ta and x = 0.01 to 0.1) or Li ₂ Mn ₃ MO ₈ (wherein M = Fe, Co, Lithium manganese composite oxide represented by Ni, Cu or Zn); LiMn ₂ O _{4 in} which a part of Li in the formula is substituted with alkaline earth metal ions; Disulfide compounds; Fe ₂ (MoO ₄ ) ₃ , and the like. However, the present invention is not limited to these.

The conductive agent is typically added in an amount of 1 to 50 wt% based on the total weight of the mixture including the positive electrode active material. Such a conductive agent is not particularly limited as long as it has conductivity without causing chemical change in the battery. Examples of the conductive agent include graphite such as natural graphite and artificial graphite; Carbon blacks such as carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, and summer black; Conductive fibers such as carbon fiber and metal fiber; Metal powders such as carbon fluoride powder, aluminum powder and nickel powder; Conductive whiskeys such as zinc oxide and potassium titanate; Conductive metal oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives and the like can be used.

The binder is a component that assists in bonding the active material and the conductive agent to the current collector, and is generally added in an amount of 1 to 50 wt% based on the total weight of the mixture including the positive electrode active material. Examples of such binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene , Polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber, fluorine rubber, various copolymers and the like.

The filler is optionally used as a component for suppressing the expansion of the anode, and is not particularly limited as long as it is a fibrous material without causing a chemical change in the battery. Examples of the filler include olefin polymers such as polyethylene and polypropylene; Fibrous materials such as glass fibers and carbon fibers are used.

The negative electrode is manufactured by applying and drying a negative electrode material on the negative electrode current collector, and if necessary, the components as described above may be further included.

The negative electrode material may be, for example, carbon such as hardly graphitized carbon or graphite carbon; Li _x Fe ₂ O ₃ (0 ≦ _x ≦ 1), Li _x WO ₂ (0 ≦ _x ≦ 1), Sn _x Me _{1 - x} Me ' _y O _z (Me: Mn, Fe, Pb, Ge; Me' Metal complex oxides such as Al, B, P, Si, Group 1, Group 2, Group 3 elements of the periodic table, halogen, 0 <x ≦ 1; 1 ≦ y ≦ 3; 1 ≦ z ≦ 8); Lithium metal; Lithium alloys; Silicon-based alloys; Tin-based alloys; SnO, SnO ₂ , PbO, PbO ₂ , Pb ₂ O ₃ , Pb ₃ O ₄ , Sb ₂ O ₃ , Sb ₂ O ₄ , Sb ₂ O ₅ , GeO, GeO ₂ , Bi ₂ O ₃ , Bi ₂ O ₄ , and metal oxides such as Bi ₂ O ₅ ; Conductive polymers such as polyacetylene; Li-Co-Ni-based materials and the like can be used.

The separator is interposed between the anode and the cathode, and an insulating thin film having high ion permeability and mechanical strength is used. The pore diameter of the separator is generally from 0.01 to 10 ㎛ ㎛, thickness is generally 5 ~ 300 ㎛. As such a separator, for example, olefin polymers such as chemical resistance and hydrophobic polypropylene; Sheet or nonwoven fabric made of glass fiber or polyethylene; Kraft paper or the like is used.

In some cases, a gel polymer electrolyte may be coated on the separator to increase the stability of the battery. Representative of such gel polymers are polyethylene oxide, polyvinylidene fluoride, polyacrylonitrile and the like.

When a solid electrolyte such as a polymer is used as the electrolyte, the solid electrolyte may also serve as a separator.

The said lithium salt containing non-aqueous electrolyte consists of a nonaqueous electrolyte and a lithium salt. As the non-aqueous electrolyte, a non-aqueous electrolyte, a solid electrolyte, an inorganic solid electrolyte and the like are used.

Examples of the nonaqueous electrolytic solution include N-methyl-2-pyrrolidinone, propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, But are not limited to, lactone, 1,2-dimethoxyethane, tetrahydroxyfuran, 2-methyltetrahydrofuran, dimethylsulfoxide, 1,3-dioxolane, formamide, dimethylformamide, Nitrile, nitromethane, methyl formate, methyl acetate, phosphoric acid triester, trimethoxymethane, dioxolane derivatives, sulfolane, methyl sulfolane, 1,3-dimethyl-2-imidazolidinone, propylene carbonate derivatives , Tetrahydrofuran derivatives, ether, methyl pyrophosphate, ethyl propionate and the like can be used.

Examples of the organic solid electrolyte include polyethylene derivatives, polyethylene oxide derivatives, polypropylene oxide derivatives, phosphate ester polymers, polyedgetion lysine, polyester sulfides, polyvinyl alcohols, polyvinylidene fluorides, Polymers containing ionic dissociating groups and the like can be used.

As the inorganic solid electrolyte, for example, Li ₃ N, LiI, Li ₅ NI ₂ , Li ₃ N-LiI-LiOH, LiSiO ₄ , LiSiO _{4 -} LiI-LiOH, Li ₂ SiS ₃ , Li ₄ SiO ₄ , _{Li 4 SiO 4 - LiI-LiOH} , Li 3 PO 4 - there is a Li nitrides, halides, sulfates, etc., such as Li ₂ S-SiS ₂ can be used.

The lithium salt is a material that is readily soluble in the non-aqueous electrolyte, for example, LiCl, LiBr, LiI, LiClO 4, LiBF 4, LiB 10 Cl 10, LiPF 6, LiCF 3 SO 3, LiCF 3 CO 2, LiAsF _{6, LiSbF 6, LiAlCl 4,} CH 3 SO 3 Li, CF 3 SO 3 Li, (CF 3 SO 2) 2 NLi, chloroborane lithium, lower aliphatic carboxylic acid lithium, lithium tetraphenyl borate and imide have.

In addition, for the purpose of improving charge / discharge characteristics, flame retardancy, etc., for example, pyridine, triethyl phosphite, triethanolamine, cyclic ether, ethylene diamine, n-glyme, hexaphosphate triamide, etc. Nitrobenzene derivatives, sulfur, quinone imine dyes, N-substituted oxazolidinones, N, N-substituted imidazolidines, ethylene glycol dialkyl ethers, ammonium salts, pyrroles, 2-methoxy ethanol, aluminum trichloride, etc. It may be. In some cases, a halogen-containing solvent such as carbon tetrachloride or ethylene trifluoride may be further added to impart nonflammability, or a carbon dioxide gas may be further added to improve high-temperature storage characteristics.

In general, a secondary battery cell is manufactured by connecting a protection circuit or the like to a core cell in which a plurality of electrode plates are arranged in series or in parallel. The secondary battery cell is preferably made of a pouch-type battery in which an electrode assembly is embedded in a battery case of a laminate sheet including a resin layer and a metal layer so as to be able to be bent in itself while minimizing weight increase. Can be.

The secondary battery cells are mounted on one or both head members in two or more numbers. That is, the battery cells may be embedded in the head member, one on each side or continuously on one side of the light source, and two or more battery cells may be embedded in the head member according to the output size of the desired light source. .

In one preferred embodiment, the battery cells are mounted at 50% or more based on the length of one side of the head member, so that the appropriate weight of the head member can be uniformly dispersed in consideration of the output and weight of the desired light source. I can attach it.

The electrical connection of the battery cells embedded in the head member may use a variety of methods according to the output capacity of the desired head lamp light source, for example, may be configured in parallel or in series.

The parallel connection structure is achieved by arranging two or more battery cells so that the electrode terminals of the same polarity are continuous and connected to the connection member. On the contrary, a series connection structure is achieved by arranging two or more battery cells in a long manner so that electrode terminals of opposite polarity are continuous and connected by connecting members.

The electrical connection of such battery cells can be realized by performing spot welding using thin, thin connection members such as, for example, copper conductors, metal plates, and the like.

The battery cells are continuously mounted in the lateral direction, that is, the length direction of the head member, as described above, so as to provide a desired battery capacity while minimizing the increase in thickness of the head member. That is, when using a plate-shaped battery as a battery cell, the side surfaces of the plate-shaped batteries are mounted to be adjacent to each other. Since the adjacent portions of the battery cells have a predetermined space, it is possible to bend according to the material properties of the head member.

Therefore, the head member is not particularly limited as long as the head member is made of a material having durability and elasticity. For example, rubber, silicone, elastic synthetic resin, or the like may be used. In particular, the head member is preferably formed of a synthetic resin that is flexible enough to be bent and has a predetermined strength in order to embed the battery cell and protect the battery cell from external force.

The shape of the head member is not particularly limited as long as it is a shape that can be worn on a predetermined body part, for example, the head. For example, the head member is formed in a circular or oval shape to improve the adhesion when the head lamp is worn on the head. Can be.

The head member may have a structure in which both ends of the head member are separated from each other with respect to the light source, or on the contrary, may be connected to each other. For example, when both ends of the head member are continuously connected, an inner surface of the head member may use a rubber band or silicone with a cushion to improve the adhesion when the head lamp is worn on the head. On the contrary, in a structure in which both ends are separated from each other, each end of each side may be connected by using a connecting member made of an elastic material such as a rubber band.

As described above, the headlamp according to the present invention may be preferably used for outdoor activities such as night leisure activities because it is made of a secondary battery capable of exhibiting optimal performance even at subzero temperatures.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the scope of the present invention.

1 is a schematic diagram of a head lamp according to an exemplary embodiment of the present invention, and FIG. 2 is a partial schematic diagram illustrating a connection relationship between battery cells built in the head member in the head lamp of FIG. 1.

Referring to these drawings, the head lamp 100 is a light source member 10 is mounted on the central portion of the head member 30, the battery cells 21 are head members connected to both sides around the light source member 10 Each of the casings 23 of 30 is constructed in a structure.

The battery cells 21 made of a lithium secondary battery having a structure in which a stacked electrode assembly is embedded in a pouch type case are composed of 2 to 4 pole plates 26 per cell, and the positive electrode terminal 22 is a positive electrode. The negative electrode terminal 24 of the terminals is electrically connected in parallel with the negative electrode terminals using the copper conductive wire 28.

Therefore, despite the mounting of a secondary battery that provides a predetermined battery capacity, since the battery cells 21 are built in the head member 30, there is almost no increase in the volume of the head lamp 100, and furthermore, the battery cells. Since 21 are adjacently distributed in the lateral direction, a plurality of 21 are mounted so that the weight is not biased to one side.

The elliptical head member 30 is made of synthetic resin, and the battery cells 21 are built in the spaces formed between the bent portions 32 of the head member 30, respectively, and on the inner surface of the head member 30. Since the silicon (not shown) is mounted, when the head lamp 100 is worn on the head, the adhesion between the head and the head lamp 100 is in close contact with each other.

Rubber bands 40 having excellent elasticity are coupled to both end portions of the head member 30 around the light source member 10, so that the length of the head member 30 can be adjusted to suit the size of the head.

One side of the light source member 10 is provided with a button 12 for turning on and off the power of the battery cell 21, the rear side 14 of each of the protection circuit module (PCM) and the battery cells (21) An electrode terminal is formed in which electrode terminals are connected in parallel (to simplify the drawing, the electrode terminal and the protection circuit module are not shown).

Although described above with reference to the drawings according to an embodiment of the present invention, those of ordinary skill in the art will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

As described above, the head lamp according to the present invention has two or more battery cells built into the head member to electrically connect and bend the connection, thereby securing the desired output, while suppressing the volume increase as much as possible. It does not cause weight bias and has the effect of exerting high operating performance even at sub-zero temperatures.

1 is a schematic diagram of a headlamp according to one embodiment of the present invention;

2 is a partial schematic view of a battery cell built in the head member in the head lamp of FIG.

Claims (13)

A headlamp comprising at least one light source member and a head member respectively provided on both sides of the light source member, wherein the head member is a plate-shaped battery cell in which a stack type or a stack / fold type electrode assembly is incorporated, and the number of pole plates per battery cell is included. Two or more secondary battery cells of less than 10 are mounted in an electrically connected state, the battery cells are characterized in that the side is continuously mounted to the side so that the electrical connection between each other bendable. delete The headlamp of claim 1, wherein the secondary battery cell is composed of two to four electrode plates. The headlamp of claim 1, wherein the secondary battery cell is made of a lithium secondary battery. The headlamp as claimed in claim 4, wherein the secondary battery cell is a pouch type battery cell in which an electrode assembly is embedded in a laminate sheet including a metal layer and a resin layer. The headlamp of claim 1, wherein the secondary battery cells are mounted in one or more numbers of one side head member. The headlamp of claim 1, wherein the secondary battery cells are mounted at 50% or more based on the length of one head member. The headlamp of claim 1, wherein the electrical connection of the secondary battery cells is in parallel or in series. The headlamp of claim 1, wherein the head member is made of a material having durability and elasticity. The headlamp of claim 1, wherein the head member is formed in a circular or elliptical shape. 11. The headlamp according to any one of claims 1 and 3 to 10, wherein the headlamp is for outdoor use. A headlamp comprising at least one light source member and a head member respectively provided on both sides of the light source member, wherein the head member is mounted with two or more secondary battery cells made of two to four pole plates electrically connected thereto. The battery cells are headlamps, characterized in that the side is continuously mounted so that the electrical connection between each other bendable. A headlamp including at least one light source member and a head member respectively installed at both sides of the light source member, wherein the head member is electrically connected to at least two secondary battery cells mounted at 50% or more based on one side length. The battery cells are headlamps, characterized in that the battery cells are continuously mounted to the side so that the electrical connection between each other can be bent.

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