KR100814780B1 - Battery having side electric conduction plate - Google Patents

Abstract

The present invention relates to a battery having a side collector plate. The present invention relates to a battery having a pole plate group in which a positive electrode plate and a negative electrode plate are alternately stacked with a separator plate interposed therebetween, a current collector plate welded to the side of the pole plate group, and a terminal connected to the current collector plate. An insertion groove is formed at a side of the collector plate, and a coupling protrusion fitted to the insertion groove is formed at an inner surface of the current collector plate, thereby providing a battery that is welded and coupled with the coupling protrusion inserted into the insertion groove. At this time, the maximum depth of the insertion groove and the maximum thickness of the engaging projection is preferably the same as possible. The present invention is welded in the state that the engaging projection is inserted into the insertion groove has the effect that the pole plates are aligned neatly, and has a high contact area with the current collector plate.

Battery, nickel-hydrogen, electrode plate, current collector plate, welding

Description

Battery having a side collector plate {Battery having side electric conduction plate}

1 is a perspective view showing a battery according to the prior art.

FIG. 2 is a cross-sectional view of the main assembly of FIG. 1.

3 is an exploded perspective view of the electrode plate assembly constituting the battery according to the present invention.

Figure 4 shows a cross-sectional view of the combination of the electrode plate assembly according to FIG.

Figure 5 shows a cross-sectional view and enlarged view of the main portion of Figure 3 combined.

6 is a cross-sectional view of a battery according to the first aspect of the present invention.

7 is a sectional view of principal parts of a battery according to a second embodiment of the present invention.

Fig. 8 is an exploded perspective view of the battery according to the third aspect of the present invention and the principal part assembling sectional view.

Fig. 9 is an exploded perspective view of the battery according to the fourth aspect of the present invention and the principal part assembling sectional view.

10 is a perspective view of principal parts of a battery according to a fifth embodiment of the present invention.

11 is a perspective view showing main components of a battery according to a sixth aspect of the present invention.

12 is an exploded perspective view showing a state in which FIG.

13 is a perspective view of principal parts of a battery according to a seventh aspect of the present invention.

Explanation of symbols on the main parts of the drawings

10: separator 15: heat insulating material

20,30: pole plate 22,32: pole tab

22a, 32a: Insertion groove 50: Plate group

60: collector plate 60a: coupling protrusion

61: collector plate body 63: the horizontal portion

64: fitting portion 65: inclined portion

66: rib 67: insertion groove

100: pole plate assembly 150: connection frame

152: fastening groove 160: connection terminal

210: roll 220: terminal

L: Maximum depth of insertion groove T: Maximum thickness of coupling protrusion

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery having a side current collector plate. In particular, in welding-coupling a current collector plate to a side of the pole plate, the electrode plate is aligned by forming a fitting structure on the pole plate and the current collector plate, and then welding them. It relates to a cell coupled with a high contact area.

Generally, secondary batteries such as nickel-hydrogen (Ni-MH) batteries, lead acid batteries, nickel-cadmium (Ni-Cd) batteries, and storage batteries used in an uninterruptible power supply system, for example, electricity A battery such as an electric double layer capacitor has an electrode plate group in which a plate-shaped positive plate and a negative plate are alternately stacked with a separator interposed therebetween. Generally, the battery is manufactured and completed by embedding the above-described electrode plate group in a roll, and sealing and bonding the cover to the top of the roll in the state in which the electrolyte is impregnated. Batteries have a variety of shapes depending on the type and use of a device that requires a power source, a battery such as a cylindrical or polygonal mold (for example, rectangular) is commonly used.

In this case, the positive electrode plate and the negative electrode plate is impregnated with an electrolyte after the electrode active material is fixed to exhibit electrical performance. For example, in the case of a nickel-hydrogen (Ni-MH) battery, the positive electrode plate is composed of nickel oxide fixed to a nickel (Ni) metal, and the negative electrode plate is fixed to a hydrogen storage alloy on a paste to the nickel (Ni) punching metal. It is configured. And the separator is a non-conductor, mainly non-woven fabric such as paper or fiber is used.

In addition, the positive electrode plate and the negative electrode plate may be provided with pole tabs, the positive electrode tabs of the positive electrode and the negative electrode of the negative electrode tabs are coupled to each other, but may be electrically welded by the current collector plate.

For example, Japanese Patent Laid-Open No. 2002-343333 discloses a nickel-hydrogen battery in which current collector plates are coupled to both sides of a pole plate group, but weld-bonded using an electron beam. This will be described with reference to FIGS. 1 and 2 as follows. 1 is an exploded perspective view of a nickel-hydrogen battery shown in the prior patent document, Figure 2 is a cross-sectional view of the main portion of the assembled state of FIG.

Referring to FIGS. 1 and 2, in the above-mentioned prior patent document, a plurality of anode plates 3 and a cathode plate 4 are alternately stacked with the separator 5 therebetween to form a pole plate group 6. At the side of the electrode plate group 6, the positive electrode plate 3 is coupled to the positive electrode plates 3, and the negative electrode plate 4 is coupled to the negative electrode plates 4 by using the current collector plate 1, but the inner surface of the current collector plate 1. A nickel-hydrogen battery, which is weld-bonded by using an electron beam in a state in which a nickel-phosphorus (Ni-P) oxide 1a is coated in an bar shape, has been proposed. At this time, the nickel-phosphorus (Ni-P) oxide (1a) can be easily dissolved, the electrode plate (3) (4) and by the melting of the nickel-phosphorus (Ni-P) oxide (1a) during irradiation of the electron beam The current collector plate 1 is coupled.

However, the battery disclosed in the above patent document is a process for forming a nickel-phosphorus (Ni-P) oxide (1a) on the current collector plate 1, the air flow plating method is further advanced, the manufacturing is complicated by this process, The welding process proceeds in a state in which the electrode plates 3 and 4 are not aligned so that the defective rate of the electrode plate group 6 is high.

In addition, referring to FIG. 2, the nickel-phosphorus (Ni-P) oxide 1a is melted and then hardened between the electrode plates 3 and 4 and the current collector plate 1 to form a non-contact space S. As a result, there is a problem in that the contact area between the electrode plates 3 and 4 and the current collector plate 1 is low.

On the other hand, when welding inevitably generates a high heat, this may cause the separator 5 to be carbonized, conventionally there is no means to prevent this, there is a problem that the edge of the separator 5 is carbonized do. In addition, the heat generated during welding is directly transmitted to the pole plates 3 and 4, thereby lowering the electrical performance of the electrode active material adhered thereto, and increasing the defective rate of the pole plates 3 and 4. .

The present invention has been invented to solve the problems described above, in the welding coupling the current collector plate to the side of the pole plate, by forming a fitting structure on the pole plate and the current collector plate and then weld-bonded, the pole plate is aligned neatly It is an object to provide a battery which can be combined in a high contact area.

In addition, the present invention is to provide a battery that can prevent the carbonization of the separator during welding, by blocking the heat transmitted to the electrode plate by the heat insulating treatment of the edge of the separator plate to prevent the failure rate and electrical performance degradation of the electrode plate. There is a purpose.

In order to achieve the above object, the present invention, the positive electrode plate and the negative electrode plate and the current collector plate welded to the side of the pole plate group alternately stacked between the separator plate and the electrode plate and the electrode plate is built-in In the battery comprising a cover which is hermetically coupled to an electric roll, an electrolyte solution impregnated in the pole plate group, and a terminal electrically connected to the current collector plate,

Insertion grooves are formed on side surfaces of the positive electrode plate and the negative electrode plate, and the current collector plate is provided with a coupling protrusion fitted to the insertion groove on an inner surface thereof, to provide a battery that is welded and coupled in a state where the coupling protrusion is inserted into the insertion groove. .

At this time, the maximum depth of the insertion groove and the maximum thickness of the engaging projection is preferably the same as possible.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail. The accompanying drawings show an exemplary embodiment of the present invention, Figure 3 is an exploded perspective view of the electrode plate assembly according to a preferred embodiment of the present invention, Figure 4 is a cross-sectional view showing a combined cross-sectional view of the electrode plate assembly according to FIG. , Figure 5 shows a cross-sectional view and the main portion enlarged view of the combination of FIG.

Referring to Figures 3 to 5, the battery according to the present invention comprises a pole plate assembly 100, the pole plate assembly 100 is the pole plate group 50 and the side of the pole plate group 50 The current collector plate 60 is welded in the direction. The electrode plate group 50 is formed by alternately stacking a plurality of positive electrode plates 20 and negative electrode plates 30 with separators 10 therebetween. The positive electrode plate 20 and the negative electrode plate 30 are provided with pole tabs 22 and 32 on their side surfaces, respectively. At this time, the pole tabs 22 and 32 may be integrally formed with the pole plates 20 and 30 or separately manufactured and then welded to the side surfaces of the pole plates 20 and 30. In the accompanying drawings, reference numerals 21 and 31 denote electrode active materials 21 and 31 fixed to the electrode plates 20 and 30.

Referring to FIG. 4, according to the present invention, the positive electrode plate 20 and the negative electrode plate 30 are inserted into the pole tabs 22 and 32 provided in the positive electrode plate 20 and the negative electrode plate 30 in detail. Grooves 22a and 32a are formed, and the current collector plate 60 has a coupling protrusion 60a fitted into the insertion grooves 22a and 32a on an inner surface thereof (a surface in contact with the pole tabs 22 and 32). ) Is formed. Then, the coupling protrusion 60a of the collector plate 60 is tightly inserted into the insertion grooves 22a and 32a formed in the pole tabs 22 and 32, and then the welding beam W is formed on the outer surface of the collector plate 60. Irradiated and welded together. The welding here includes welding by electron beam, laser beam, high frequency plasma, or the like.

The insertion grooves 22a and 32a and the coupling protrusion 60a may have various shapes such as semicircular, semi-elliptic, triangular, and square. In FIG. 4, the shape of the insertion grooves 22a and 32a is semicircular, and the shape of the coupling protrusion 60a is triangular. At this time, as shown in Figure 4, the cross-sectional shape of the coupling protrusion (60a) is preferably a triangle. As such, when the cross-sectional shape of the coupling protrusion 60a has a vertex as a triangle, a local contact P is formed at the time of welding by the vertex. Accordingly, while the welding pressure is concentrated to the contact point P to enable instant welding, the heat transfer area transmitted to the pole tabs 22 and 32 around the contact point P can be minimized.

The insertion grooves 22a and 32a may be formed by punching and cutting, and the coupling protrusion 60a may be formed by pressing and bending to form an integrated structure with the current collector 200. In addition, the pole tabs 22 and 32 and the current collector 200 are preferably made of the same material.

4, the maximum depth L of the insertion grooves 22a and 32a and the maximum thickness T of the coupling protrusion 60a are preferably the same as possible. 4, where L = T. In this way, when the maximum depth T of the insertion grooves 22a and 32a and the maximum thickness T of the engaging projection 60a are the same, the pole tab 22 ( 32) the contact area between the current collector plate 60 is increased, thereby improving the conductivity of both. Specifically, the contact grooves P which the insertion grooves 22a and 32a and the coupling protrusion 60a come into contact with, of course, are completely in close contact with each other and have excellent conductivity.

According to the present invention, when welded in a state where the engaging projection 60a is inserted into the insertion grooves 22a and 32a as described above, the pole plates 20 and 30 are combined with the insertion grooves 22a and 32a. Aligned by the fitting of 60a), the pole plates 20 and 30 are welded in a neatly aligned state. At this time, two or more alignment grooves 22b and 32b disposed on at least one side of the positive electrode plate 20 and the negative electrode plate 30, specifically, the pole tabs 22 and 32, preferably at predetermined intervals. This can be formed. The alignment grooves 22b and 32b are intended to be arranged so that the pole plates 20 and 30 are arranged more neatly by inserting separate bars therein, which are semicircular, circular, semi-elliptic, elliptical, triangular, It may have various shapes such as a square. Two or more alignment grooves 22b and 32b are preferably formed, but they are preferably different in shape from each other. Thus, when two or more alignment grooves 22b and 32b differ in shape from each other, there is an advantage that the position thereof becomes clear without confusion in fitting the bars. In FIG. 4, the circular alignment grooves 22b and 32b and the elliptical alignment grooves 22b and 32b are alternately formed.

Meanwhile, referring to FIGS. 3 and 5, high heat may be generated in the process of welding the electrode plates 20 and 30 and the current collector plate 60. In this case, the isolation may be prevented by high heat. It is preferable that the edge 10a of the plate 10 is heat-insulated. The separator 10 is heat-insulated by applying a heat insulating material 15 to its edge 10a. As described above, when the heat insulating material 15 is applied to the edge 10a of the separator 10 and is insulated, high heat generated during welding is applied to the electrode active materials 21 and 31 of the electrode plates 20 and 30. Blocking the direct transmission, there is an advantage that can prevent the electrical performance of the pole plate 20, 30, and reduce the defective rate due to short.

The separator 10 may be made of a conventional material. For example, a nonwoven fabric such as paper or fiber, and a polyethylene (PE) or polypropylene (PP) nonwoven fabric may be used.

In addition, the heat insulating material 15 may be applied to the edge 10a of the separator 10 by coating, impregnation, or the like, and the heat insulating material 15 may be used as long as it is non-conductive and heat resistant. The heat insulating material 15 may be selected from, for example, heat resistant resins such as fluorocarbon resins. In this case, the fluororesin is polytetrafluoroethylene (PTFE), tedrahfluoroethylene-hexafluoropropylene copolymer (FEP), tedrahfluoro-ethylene perfluoroalkyl vinyl ether copolymer (PFA) and polyvinylidene fluoride (PVDF) Examples thereof include polytetrafluoro-ethylene (PTFE) having excellent heat resistance.

In addition, the heat insulating material 15 may use a heat resistant material including cork powder or inorganic powder. Specifically, the heat-resistant material is made of a binder resin, a powder having a particle size of 5㎛ ~ 400㎛ mixed as one or more selected from cork or inorganic material. At this time, although not particularly limited, the cork or the inorganic powder may be contained by 20 to 400 parts by weight based on 100 parts by weight of the binder resin.

In addition, the binder resin constituting the heat-resistant material may be polyether ether ketone (PEEK), polyamide (PA), nylon (PA66), polyphenylene-sulfide (PPS) and the like, preferably the fluorine resin It is good to use The inorganic material may be calcium carbonate, calcium hydroxide, aluminum hydroxide, magnesium hydroxide, or the like.

The battery according to the present invention includes the electrode plate assembly 100 made of the electrode plate assembly 100 described above, that is, the electrode plate group 50 and the current collector plate 60 welded to the side direction of the electrode plate group 50. It is configured by. More specifically, the pole plate assembly 100 is embedded in the roll, and then the cover plate 50 is completed by sealing and coupling the upper portion of the roll in the state in which the electrode plate 50 is impregnated with the electrolyte. A terminal is connected to the current collector plate 60. In this case, the battery according to the present invention may be an upper terminal type or a side terminal type depending on the position of the terminal. Specifically, the terminal is connected to the current collector plate 60, the position of the terminal may be an upper terminal type located on both sides of the top of the roll, and the terminal may be a side terminal type located on both sides of the roll. In addition, the battery according to the present invention may have a large capacity in which two or more pole plate assemblies 100 are connected in parallel or in series.

6 and 7 show a side terminal type, FIG. 6 is a sectional view of a battery according to the first aspect of the present invention, and FIG. 7 is a sectional view of principal parts of a battery according to the second aspect of the present invention.

First, referring to FIG. 6, the battery includes a roll 210, a cover 280 hermetically coupled to an upper portion of the roll 210, a pole plate assembly 100 embedded in the roll 210, Electrode solution impregnated in the electrode plate group 50 constituting the electrode plate assembly 100, and a terminal 220 electrically connected to the current collector plate 60 constituting the electrode plate assembly 100, the terminal ( The 220 is positioned in the side direction of the precursor 210 is welded or bolted to the current collector plate 60. In FIG. 6, reference numeral 270 denotes a vent cap for exhausting the gas generated inside the roll 210 to the outside under a set pressure.

The current collector plate 60 and the terminal 220 may be coupled by bolting or by welding in the side direction of the rolling member 210. FIG. 6 shows a coupling structure by bolting.

As shown, terminal insertion holes 61a and 212a are formed in the wall 212 of the current collector plate 60 and the rolling element 210. A packing 230 for preventing leakage of the electrolyte is interposed between the current collector plate 60 and the wall 212. In the state where the terminal 220 is inserted into the terminal insertion holes 61a and 212a, the washer 240 and the nut 250 are coupled to the terminal 220 in order from the outside of the roll 210.

Thus, as shown in Figure 6, the current collector plate 60 and the terminal 220 is connected in the side direction, the space of the upper side (S) as well as the space of the side is minimized to reduce the volume of the battery.

In addition, Figure 7 is a cross-sectional view of the main portion showing another embodiment of the side terminal type as described above, the current collector plate 60 and the terminal 220 is shown to be coupled by welding in the side direction of the roll 210.

Referring to FIG. 7, the current collector plate 60 and the terminal 220 may be coupled by welding, and the terminal 220 may include a protrusion 222 and an outer cap 215 welded to the current collector plate 60. ) And a main body 224 coupled to the uneven structure. And the other side of the main body 224 is formed with a fastening hole 225 is formed threaded. As shown in FIG. 7, the terminal 220 has an uneven structure in which an interface between the main body 224 and the outer cap 215 comes into contact with each other by insert injection molding. It is good to have. The outer cap 215 is molded integrally with the roll 210. A separate connection terminal 260 is screwed to the fastening hole 225. At this time, the welding rod is inserted into the fastening hole 225, and the current collector plate 60 and the protrusion 222 are spot welded. In FIG. 7, reference numeral W denotes a welding point.

8 to 10 show an upper terminal type, FIG. 8 is an exploded perspective view and a main part assembling sectional view of the battery according to the third aspect of the present invention, and FIG. 9 is an exploded perspective view of the battery according to the fourth aspect of the present invention. And main assembly section. 10 is an exploded perspective view of the main portion of the battery according to the fifth aspect of the present invention, wherein the terminal 220 and the current collector plate 60 are exploded.

First, referring to FIG. 8, the battery includes a roll 210, a cover 280 hermetically coupled to an upper portion of the roll 210, and a pole plate assembly 100 embedded in the roll 210. The terminal 220 includes an electrolyte solution impregnated in the electrode plate group 50 constituting the electrode plate assembly 100, and a terminal 220 electrically connected to the current collector plate 60 constituting the electrode plate assembly 100. 220 is positioned on the top of the precursor 210 is welded or bolted to the top of the current collector plate (60). In FIG. 8, reference numeral 270 denotes a vent cap for exhausting gas generated inside the roll 210 to the outside under a set pressure.

As illustrated in FIG. 8, the current collector plate 60 may be bent at a right angle from the main body 61 at an upper end thereof, and may be bent at a right angle from the horizontal portion 63 and a horizontal portion 63 provided by bending inwardly. , Has a fitting portion 64 provided to be bent upward. And the terminal 220 is provided with a fitting groove 227, the fitting portion 64 is fitted at the lower end thereof. In this case, the fitting groove 227 is provided by two extension parts 221 formed at the lower end of the terminal 220.

The current collector plate 60 and the terminal 220 may be coupled by welding or by bolting. FIG. 8 illustrates a coupling structure by bolting. Specifically, insertion holes 64a and 221a are formed in the fitting portion 64 and the extension portion 221, and the bolt B is inserted into the insertion holes 64a and 221a. ) May be fastened and coupled. The terminal 220 and the current collector plate 60 have a large contact area by the fitting groove 227 provided in the terminal 220, and thus have an effective electrical flow.

As above, after combining the current collector plate 60 and the terminal 220, they are embedded in the precursor 210. The washer 240 and the nut 250 are fastened to the terminal 220, and the cover 280 is sealed to be completed. In FIG. 8, reference numeral 230 denotes a packing for preventing leakage of the electrolyte solution.

The current collector plate 60 and the terminal 220 may be coupled by bolting or by welding. FIG. 9 illustrates a structure that may be coupled by welding.

As shown in FIG. 9, the current collector plate 60 has both inclined portions 65 provided at an upper end thereof by bending inward from the main body 61, and both ribs extending from the inclined portions 65. A rib 66 may be formed to provide an insertion groove 67. In addition, the terminal 220 has one extension portion 221 formed at an end thereof, and the extension portion 221 may be welded after the insertion groove 67 of the current collector plate 60 is fitted. As such, when the current collector plate 60 is provided with the insertion groove 67, and the extension part 221 is fitted thereto and coupled thereto, the contact area between the current collector plate 60 and the terminal 220 is wide and thus has excellent electrical flow. At this time, the inclined portion 65 is provided to be inclined inclined in the inward direction from the upper end of the main body 61 in order to provide the insertion groove 67 of the width substantially the same as the thickness of the extension portion 221. In FIG. 9, reference numeral W denotes a welding point.

In addition, as illustrated in FIG. 10, the current collector plate 60 has an inclined surface 61c formed at an upper end of the main body 61, and the inclined surface 61c has a width of the end 61b of the main body 61. It may be configured smaller than the main body 61. In addition, two ribs 66 may be extended to the end 61b to have a structure in which an insertion groove 67 is formed between the two ribs 66. And the extension portion 221 of the terminal 220 is inserted into the insertion groove 67, and then welded or bolted.

11 to 13 show a large capacity of the above-described pole plate assembly 100 connected in parallel or in series, FIG. 11 is a perspective view showing main components of a battery according to a sixth aspect of the present invention. FIG. 12 is an exploded perspective view showing a state in which FIG. 12 is incorporated in the rolling mill 210. 13 is a perspective view of principal parts of a battery according to a seventh aspect of the present invention.

Referring to FIG. 11, the battery according to the present invention has a large capacity and is configured by electrically connecting at least two pole plate assemblies 100. In FIG. 11, four pole plate assemblies 100 are connected in parallel.

The pole plate assemblies 100 are electrically connected to each other by a connection frame 150. The connection frame 150 has a fastening groove 152 formed long in the lower end thereof. The upper end 68 of the current collector plate 60 is fitted into the fastening groove 152. As such, after the upper end 68 of the current collector plate 60 is inserted into the fastening groove 152, bolting or welding is further performed for firm coupling between the two ends. The connecting frame 150 and the current collector plate 60 are made of the same material as possible as nickel, nickel alloy, SUS alloy, or the like, for example.

In addition, the connection frame 150 is provided with a connection terminal 160 protruding upwards. The connection terminal 160 may be integrally molded with the connection frame 150 or may be separately molded and welded to the connection frame 150. The connection terminal 160 is connected to the terminal 220 (see FIG. 12), and a terminal insertion hole 160a may be provided therein.

FIG. 12 is an exploded perspective view illustrating a state in which FIG. 11 is embedded in the roll 210, and illustrates a side terminal type in which the terminal 220 is located in the side direction.

Referring to FIG. 12, the pole plate assemblies 100 assembled by the connection frame 150 are embedded in the roll 210. In this case, as illustrated in FIG. 12, the roll 210 may be partitioned into the partition wall 216 so that the pole plate assemblies 100 are accommodated one by one, and may have a plurality of receiving portions 218. In addition, a terminal insertion hole 212a may be formed at an upper end of the wall 212 of the roll 210.

As shown in FIG. 12, the connection terminal 160 and the terminal 220 are electrically connected to each other. At this time, the terminal 220 is the end thereof is exposed in the side direction of the roll 210. Specifically, the terminal 220 penetrates through the terminal insertion hole 160a of the connection terminal 160 and the terminal insertion hole 212a of the roll 210, and then the washer 240 and the nut from the outside of the roll 210. After the 250 is fastened in turn, the end thereof is exposed to the outside in the side direction of the precursor 210. Then, the electrolyte plate is impregnated into the electrode plate assembly 100, and then a cover (not shown) is seal-bonded on the upper part of the precursor 210 to be completed and manufactured.

In addition, as shown in FIG. 13, the plurality of pole plate assemblies 100 may be connected in parallel, but the terminals 220 may be coupled at the top. Specifically, as shown in FIG. 13, the plate assembly 100 may be connected in zigzag form by a connecting frame 150 to have a series connection.

At this time, the current collector plate 60 is bent at a right angle from the main body 61 at its upper end, the horizontal portion 63 provided by bending inward, and bent at a right angle from the horizontal portion 63, and bent upwards It has the fitting part 64 provided. And the fitting portion 64 is fitted into the coupling groove 152 formed on the lower end of the connecting frame 150 is coupled. As such, after the fitting portion 64 of the current collector plate 60 is inserted into the fastening groove 152, bolting or welding is further performed for firmly coupling the two.

At this time, the terminal 220 may be coupled from the top, for this purpose, the terminal 220 is provided with a fitting groove 227 at the bottom thereof. The fitting groove 227 is provided by two extension parts 221 extending at the lower end of the terminal 220. In addition, the connection terminal 160 provided on the upper end of the connection frame 150 is fitted into the fitting groove 227 of the terminal 220 and is coupled by bolting or welding by bolts B and nuts N or by welding. do.

In addition, the two pole plate assemblies 100 positioned at both ends of the pole plate assembly 100 have a fitting portion 64 formed at the contact plate 60 thereof fitted into the fitting groove 227 of the terminal 220, and then bolting. Or by welding.

As described above, the present invention is coupled by a high contact area in the state that the pole plates 20 and 30 are aligned, by the fitting structure consisting of the insertion groove (22a) 32a and the engaging projection (60a) defective rate This has the effect of exhibiting little and excellent electrical performance.

Claims (9)

delete delete An electrode plate group 50 in which an anode plate 20 and an anode plate 30 are alternately stacked with the separator 10 therebetween; A current collector plate 60 welded to the side of the pole plate group 50; A cover 210 that is tightly coupled to the roll 210 and the roll 210 in which the pole plate group 50 and the collector plate 60 are embedded; An electrolyte solution impregnated in the electrode plate group 50; In the battery comprising a; terminal 220 is electrically connected to the current collector plate 60, Insertion grooves 22a and 32a are formed at side surfaces of the positive electrode plate 20 and the negative electrode plate 30, and the current collector plate 60 has a coupling protrusion fitted into the insertion grooves 22a and 32a on an inner surface thereof. 60a is formed and welded in a state where the engaging projection 60a is fitted into the insertion grooves 22a and 32a, The terminal 220 is located on the top of the precursor 210 is electrically connected to the current collector plate 60, The current collector plate 60 is provided with a fitting portion 64 at its upper end, and the terminal 220 has a fitting groove 227 into which the fitting portion 64 is fitted at its lower end, and the fitting groove 227. Battery is characterized in that the bolted or welded in a state in which the fitting portion 64 is fitted. An electrode plate group 50 in which an anode plate 20 and an anode plate 30 are alternately stacked with the separator 10 therebetween; A current collector plate 60 welded to the side of the pole plate group 50; A cover 210 that is tightly coupled to the roll 210 and the roll 210 in which the pole plate group 50 and the collector plate 60 are embedded; An electrolyte solution impregnated in the electrode plate group 50; In the battery comprising a; terminal 220 is electrically connected to the current collector plate 60, Insertion grooves 22a and 32a are formed at side surfaces of the positive electrode plate 20 and the negative electrode plate 30, and the current collector plate 60 has a coupling protrusion fitted into the insertion grooves 22a and 32a on an inner surface thereof. 60a is formed and welded in a state where the engaging projection 60a is fitted into the insertion grooves 22a and 32a, The terminal 220 is located on the top of the precursor 210 is electrically connected to the current collector plate 60, The current collector plate 60 has two ribs 66 formed at an upper end thereof, and an insertion groove 67 is provided, and the terminal 220 has an extension part 221 formed at its distal end. The battery characterized in that it is bolted or welded in the state in which the extension portion 221 is fitted. A pole plate assembly composed of a pole plate group 50 in which an anode plate 20 and a cathode plate 30 are alternately stacked with a separator plate 10 interposed therebetween, and a current collector plate 60 welded to a side of the pole plate group 50. 100; A roll 210 into which the pole plate assembly 100 is embedded; A cover 280 that is hermetically coupled to the roll 210; An electrolyte solution impregnated in the electrode plate group 50 of the electrode plate assembly 100; Includes; terminal 220 is electrically connected to the current collector plate 60, Insertion grooves 22a and 32a are formed at side surfaces of the positive electrode plate 20 and the negative electrode plate 30, and the current collector plate 60 has a coupling protrusion fitted into the insertion grooves 22a and 32a on an inner surface thereof. 60a is formed and welded in a state where the engaging projection 60a is fitted into the insertion grooves 22a and 32a, The pole plate assembly 100 is a battery, characterized in that at least two electrically connected by a connection frame (150). The method of claim 5, The connection frame 150 is a battery, characterized in that the connection terminal 160 is connected to the terminal 220 is provided. The method of claim 5, The connecting frame 150 has a fastening groove 152 is formed at its lower end, the upper end 68 of the current collector plate 60 is fitted into the fastening groove 152, characterized in that the battery is bolted or welded . The method according to any one of claims 3 to 7, And a maximum portion depth (T) of the insertion grooves (22a) and (32a) and the maximum portion thickness (T) of the coupling protrusion (60a) are the same (L = T). The method according to any one of claims 3 to 7, The coupling protrusion (60a) has a triangular cross-sectional shape, characterized in that to form a local contact (P) during welding.

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