JP3829086B2 - Non-aqueous electrolyte battery and manufacturing method thereof - Google Patents

Non-aqueous electrolyte battery and manufacturing method thereof Download PDF

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Publication number
JP3829086B2
JP3829086B2 JP2001346060A JP2001346060A JP3829086B2 JP 3829086 B2 JP3829086 B2 JP 3829086B2 JP 2001346060 A JP2001346060 A JP 2001346060A JP 2001346060 A JP2001346060 A JP 2001346060A JP 3829086 B2 JP3829086 B2 JP 3829086B2
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Prior art keywords
lead
current collecting
negative electrode
positive
collecting lead
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JP2003151527A (en
Inventor
喜治 小柿
貴敏 尾崎
靖 平川
順哉 西森
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松下電器産業株式会社
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    • Y02P70/54

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-aqueous electrolyte (organic solvent-based electrolyte) battery such as a lithium ion secondary battery that is a sealed battery having a small capacity but a large capacity, and a method for manufacturing the same.
[0002]
[Prior art]
In recent years, portable and cordless electronic devices such as AV devices or personal computers and portable communication devices have been rapidly promoted. Conventionally, nickel cadmium batteries and nickel metal hydride batteries have been mainly used as power sources for driving these electric devices. However, in recent years, lithium batteries that can be rapidly charged, have high energy density, and are highly safe. Non-aqueous electrolyte secondary batteries represented by ion secondary batteries are becoming mainstream. In this non-aqueous electrolyte secondary battery, it is promoted to be a sealed type excellent in high energy density and load characteristics, and to be a square shape suitable for thinning of the device and having a high space effect.
[0003]
By the way, in recent years, there is a high demand for non-aqueous electrolyte secondary batteries to further improve battery capacity per unit volume. Therefore, conventionally, for the purpose of improving the battery capacity per unit volume, the core material of the positive and negative electrode plates (generally, the positive electrode plate is made of an aluminum core material and the negative electrode plate is made of a copper core material). It is considered to adopt a means for connecting the positive and negative current collecting leads to the core material of the positive and negative electrode plates by resistance welding or the like.
[0004]
[Problems to be solved by the invention]
In general, in resistance welding, it is preferable that there is no significant difference between the thicknesses of both of the objects to be welded. As described above, the positive and negative current collectors correspond to the thinning of the cores of the positive and negative electrodes. It is possible to reduce the thickness of each lead. However, the sealing plate that welds the end of the positive electrode current collecting lead or the negative electrode current collecting lead opposite to the welded portion with the core member may have a predetermined pressure resistance performance against an increase in battery internal pressure. Since it is necessary, it must be set several times as thick as the core material. Therefore, as shown in FIG. 6A, the other end portion of the thin lead 2 whose one end is connected to the core material (not shown) of the electrode group 1 is a sealing plate having a thickness several times that of the lead 2. 3, when the resistance welding is performed using the pair of resistance welding electrodes 4A and 4B, the thin lead 2 is melted before the sealing plate 3 at the time of welding, so that welding is performed as shown in FIG. Cracks are generated in the periphery of the part, or a hole is formed by sparking, so that not only the welding joint strength and mechanical strength are reduced, but also the internal resistance during charging and discharging of the battery is increased. The problem arises.
[0005]
Therefore, the present invention has been made in view of the above-described conventional problems, and it is possible to improve the battery capacity per unit volume without causing a decrease in bonding strength or mechanical strength between the current collecting lead and the sealing plate. An object of the present invention is to provide a non-aqueous electrolyte battery having a configuration that can be achieved and a method for manufacturing the same.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a nonaqueous electrolyte battery according to the present invention includes a battery case containing an electrode group and an electrolyte and serving as one electrode, and an opening for the battery case sealed. A sealing plate electrically connected to each other, an electrode terminal which is disposed in an insulating state on the sealing plate via an insulating gasket and serves as the other electrode, and each core material of the positive and negative bipolar plates of the electrode group 1 is connected to one end of each of the sealing plate and the electrode terminal by resistance welding , and one end of each is joined to the electrode group. And a negative electrode current collecting lead, the thickness of each of the positive and negative bipolar plates is set to 8 to 20 μm, and the positive electrode current collecting lead and the negative electrode current collecting lead have a thickness of 50 μm or less. Thin strip-shaped set to The lead piece portion has a connection portion formed at a thickness larger than that of the lead piece portion at the other end portion.
[0007]
In this non-aqueous electrolyte battery, since the connecting portion having a large thickness is provided at the other end portion of the lead piece portion of the positive and negative electrode current collecting leads, the thickness of the lead piece portion is made as thin as 50 μm or less. Even if it sets, it can join by resistance welding, without producing troubles, such as a crack and a piercing | piercing, with respect to a sealing plate with a large thickness etc. via a connection part, and can ensure sufficient joining strength and mechanical strength. While obtain this effect, positive, the lead piece of the negative electrode current collecting lead, since the thickness as described above can be below as much as possible thin 50 [mu] m, positive, the thickness of the core members of the negative electrode plate 8 The battery capacity per unit volume can be improved by reducing the thickness of each lead piece of the positive and negative current collecting leads to ˜20 μm to 50 μm or less .
[0009]
According to this configuration, when the total thickness of the positive and negative electrode plates is set to be the same as that of the conventional electrode plate, the battery capacity per unit volume can be increased by the thickness of the core material. it can. The positive and negative electrode plates are wound in a spiral shape by joining one end of each lead piece of the positive and negative current collecting leads to the winding start end or winding end of the core member. Since the spiral central part of the electrode group becomes thinner as the thickness of the electrode becomes thinner, when forming an electrode group having the same external shape as before, the number of turns is increased by the amount of the thinner spiral central part. As a result, the battery capacity per unit volume can be further improved.
[0010]
Further, the positive electrode current collecting lead and the negative electrode current collecting lead in the above invention are formed by molding or / and trimming into a shape integrally having a connection portion at the other end portion of the lead piece portion. Is preferred. According to this configuration, the leads can be mass-produced with high productivity.
[0011]
On the other hand, the positive electrode current collecting lead and the negative electrode current collecting lead in the above invention are a crushing means by applying pressure processing after the other end portion of the thin strip-like lead piece portion is folded or spirally wound. It can also be assumed that a connection portion is formed. According to this configuration, for example, a lead piece can be formed simply by cutting a metal foil into a thin strip shape, and a connecting portion can be formed simply by bending and pressing the end of the lead piece. Therefore, in particular, when aluminum having excellent workability is used as a material, the connecting portion can be easily formed, and mass production can be performed with high productivity.
[0012]
In addition, the positive electrode current collecting lead and the negative electrode current collecting lead in the above invention may be formed by attaching a connecting portion having a thickness larger than that of the lead piece portion to the other end portion of the thin strip-like lead piece portion. it can. According to this configuration, for example, a metal foil can be formed by attaching a thick connecting portion to the end portion of a lead piece portion formed by cutting a thin strip into a thin strip shape by means of an adhesive or the like. No need for bending, pressing and pressing, etc., so that a product having a required shape can be mass-produced at low cost.
[0013]
In the method for producing a non-aqueous electrolyte battery according to the present invention, one end of a lead strip portion formed in a thin strip shape in the positive electrode current collecting lead and the negative electrode current collecting lead is bonded to each core material of the positive electrode plate and the negative electrode plate. A step of housing the formed electrode group in the battery case, and joining a connecting portion formed at a thickness larger than the other end portion of the lead piece portion of the positive electrode current collecting lead to an aluminum sealing plate A step of joining a connecting portion formed at a thickness larger than the other end of the lead piece portion of the negative electrode current collecting lead to a negative electrode terminal disposed in an insulating state on the sealing plate; The step of sealing the battery case by fitting and joining the sealing plate to the opening of the battery case, and after injecting the electrolyte into the battery case from the injection hole of the sealing plate, The process of sealing the injection hole It is characterized by having.
[0014]
In this non-aqueous electrolyte battery manufacturing method, a thick connecting portion provided at the other end of the lead piece portion of the aluminum positive electrode current collecting lead is joined to an aluminum sealing plate made of the same material by welding, for example, Since the thick connecting portion provided at the other end of the lead piece portion of the nickel negative electrode current collecting lead is joined to the negative electrode terminal that is insulated from the sealing plate by the insulating gasket, the non-aqueous electrolysis of the present invention The liquid battery can be manufactured with good productivity while preventing the occurrence of defects.
[0015]
In the manufacturing method of the above invention, at least a joint portion of the negative electrode current collecting lead in the copper core material of the negative electrode plate is subjected to surface treatment to be roughened, and the roughened core material portion is used for collecting the negative electrode current. It is preferable to join one end of the lead piece of the lead by resistance welding. Thereby, for example, the negative electrode current collecting lead made of nickel can be resistance-welded to the negative electrode core material made of copper. That is, when the negative electrode current collecting lead and the negative electrode side core material are brought into contact with each other, the contact resistance increases due to the roughening of the surface of the negative electrode side core material. It is possible to mass-produce liquid batteries with high productivity while reducing costs.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a nonaqueous electrolyte battery according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the nonaqueous electrolyte battery. In these figures, an electrode group 9 having an oval cross-sectional shape is housed in a battery case 8 made of aluminum with a bottomed rectangular tube by winding a positive electrode plate, a negative electrode plate and a separator in a spiral shape. Yes.
[0017]
The positive electrode current collecting lead 10 made of aluminum and the negative electrode current collecting lead 11 made of nickel, as clearly shown in FIG. 2, are each of the positive electrode side and negative electrode side lead piece portions 15 and 16 each having a thin strip shape. The positive electrode side connection portion 12 and the negative electrode side connection portion 13 for welding, which are set to a large thickness, are integrally formed at the end portions. One end side (lower end side in the figure) of each of the positive electrode side and negative electrode side lead pieces 15 and 16 is welded to the core material of each of the positive electrode plate and the negative electrode plate and taken out from the electrode group 9. In order to improve the battery capacity per unit volume, the positive electrode plate and the negative electrode plate are set as thin as possible. Details of this will be described later. The lead piece portions 15 and 16 of each of the positive electrode current collecting lead 10 and the negative electrode current collecting lead 11 are set to have a thin thickness corresponding to the above-described reduction in the thickness of the core material.
[0018]
After the other end portions of the positive electrode current collecting lead 10 and the negative electrode current collecting lead 11 are inserted into the insertion holes 14a and 14b of the frame body 14, respectively, the positive electrode side connecting portion 12 at the other end is formed of flat aluminum. The negative electrode side connecting portion 13 is welded to the negative electrode terminal plate 18 and the sealing plate 17. As this welding, any one of resistance welding, laser welding, and ultrasonic welding can be employed. In this embodiment, resistance welding is performed.
[0019]
The frame body 14 is fitted in the vicinity of the opening of the battery case 8, and the sealing plate 17 is laser-welded to the battery case 8 while being supported on the frame body 14. The opening is sealed. An upper insulating gasket 20 is fitted in the recess 19 at the center of the sealing plate 17, and the negative electrode terminal 21 made of nickel-plated iron rivets is connected to the sealing plate 17 via the upper insulating gasket 20. The insulating gasket 20 is inserted into the insertion holes of the upper insulating gasket 20 and the sealing plate 17 in an insulated state. The lower portion of the negative terminal 21 through which the upper insulating gasket 20 and the sealing plate 17 are inserted is further inserted into the mounting holes 22a and 18a of the lower insulating gasket 22 and the negative terminal plate 18, respectively. It is caulked. Thus, the negative electrode terminal plate 18 is electrically insulated from the sealing plate 17 via the lower insulating gasket 22 and is attached to the negative electrode terminal 21 via the caulking portion in an electrically connected state.
[0020]
During assembly, the sealing plate 17 is fitted and welded to the opening of the battery case 8 with the upper insulating gasket 20, the lower insulating gasket 22, and the negative terminal plate 18 attached by the negative terminal 21. Thereafter, an electrolytic solution (not shown) is injected into the battery case 8 through the injection hole 17 a of the sealing plate 17. The liquid injection hole 17a is closed with a sealing plug 23 after the electrolyte solution is injected.
[0021]
The sealing plate 17 is formed with a safety valve hole 17b at a location opposite to the liquid injection port 17a. As shown in FIG. 1, the safety valve hole 17 b is closed by an aluminum foil film 24 provided by a cladding method on the lower surface of the sealing plate 17, and the safety valve hole 17 b in the resin film 24 is blocked. The portion constitutes a safety valve 24a for breaking and releasing gas to the outside when the battery internal pressure increases. On the other hand, a positive terminal 27 is welded to the bottom surface of the bottom wall of the battery case 8. Therefore, in this nonaqueous electrolyte battery, the battery case 8 is the positive electrode and the negative terminal 21 made of rivets is the negative electrode.
[0022]
FIG. 3A shows one end portion of each of the lead piece portions 15 and 16 of the positive electrode current collecting lead 10 or the negative electrode current collecting lead 11 as the positive electrode side core material 30 or the negative electrode side core of the positive electrode plate 28 or the negative electrode plate 29. It is a perspective view which shows the state connected to the material 31. FIG. The positive electrode plate 28 is configured by applying a positive electrode active material 32 on both surfaces of a positive electrode side core material 30 made of aluminum, and the negative electrode plate 29 is formed by applying a negative electrode active material 33 on both surfaces of a negative electrode side core material 31 made of copper. Configured. That is, the positive electrode plate 28 and the negative electrode plate 29 have the same configuration except for the formation material, and the connection form with the leads 10 and 11 is also the same. is there.
[0023]
In this embodiment, the core members 30 and 31 of the positive and negative electrode plates 28 and 29 are formed to have a thickness t1 as small as possible of 8 to 20 μm or less. Accordingly, the thickness t2 of the thin strip-like lead pieces 15 and 16 of each of the positive and negative current collecting leads 10 and 11 is set to be very thin to 50 μm or less. The connecting portions 12 and 13 having a large thickness t3 are integrally formed at the other end portion of 16. The total thickness t of the electrode plates 28 and 29 including the core materials 30 and 31 and the active materials 32 and 33 on both sides thereof is 120 to 180 μm.
[0024]
On the other hand, the electrode plate of the conventional non-aqueous electrolyte battery has a thickness T1 of the core materials 30 and 31 of about 30 μm as shown in FIG. T2 is set to about 100 μm. In addition, the thickness t of the whole electrode plate including the core materials 30 and 31 and the active materials 32 and 33 on both sides thereof is about 140 to 190 μm as in the above embodiment.
[0025]
Therefore, in the above embodiment, when the total thickness t of the positive and negative electrode plates 28 and 29 is set to be the same as that of the conventional electrode plate, the unit corresponding to the thickness t1 of the core members 30 and 31 is reduced. The battery capacity per volume can be increased. The positive and negative electrode plates 28 and 29 are wound in a spiral shape by welding one end of each of the lead pieces 15 and 16 of the positive and negative current collecting leads 10 and 11 to the winding start ends of the core members 30 and 31. Since the lead strips 15 and 16 are thinned, the spiral central portion of the electrode group 9 becomes thinner by the thickness of the lead pieces 15 and 16 from 50 μm to 100 μm. The number of turns can be increased as much as the spiral central portion becomes thinner, and this also improves the battery capacity per unit volume by about 2%.
[0026]
In the non-aqueous electrolyte battery of the above embodiment, the thicknesses t1 and t2 of the lead pieces 15 and 16 of the positive and negative electrode side core members 30 and 31 and the positive and negative electrode current collecting leads 10 and 11 are reduced. While improving the battery capacity per unit volume, sufficient bonding strength and mechanical strength can be secured at the welded portion between the lead piece portions 15 and 16 having a small thickness t2 and the sealing plate 17 and the negative electrode terminal plate 18. . That is, as clearly shown in FIG. 3, the positive and negative current collecting leads 10 and 11 have a large thickness t3 at the other end portions of the lead piece portions 15 and 16 whose one ends are connected to the core members 30 and 31 by welding. Since the positive and negative electrode side connecting portions 12 and 13 are integrally formed, the thickness t3 of the positive and negative electrode side connecting portions 12 and 13 matches the thickness of the sealing plate 17 or the negative electrode terminal plate 18 to be welded. Therefore, welding can be performed without causing any trouble. This point will be described in detail with reference to FIG.
[0027]
FIG. 4A is a longitudinal sectional view showing a state in which the positive electrode current collecting lead 10 is resistance-welded to the sealing plate 17. The positive electrode current collecting lead 10 taken out from the electrode group 9 housed in the battery case 8 through the insertion hole 14 a of the frame body 14 has a positive electrode side welding portion 12 at the other end thereof paired with the sealing plate 17 by a pair of resistance welding. By resistance welding using the electrodes 4A and 4B, the positive electrode side welded portion 12 is joined to the sealing plate 17 as shown in FIG. At this time, since the positive electrode side connecting portion 12 is set to have substantially the same thickness as the sealing plate 17, it melts almost simultaneously with the sealing plate 17 and is bonded with high bonding strength, and a crack is generated around the bonding portion, Since there is no problem such as opening of holes, high mechanical strength can be ensured. Note that, as indicated by only the reference numeral in the figure, the negative electrode current collecting lead 11 is connected to the negative electrode terminal plate 18 of the negative electrode side connecting portion 13 by resistance welding similarly to the positive electrode current collecting lead 10 described above. You can do that.
[0028]
By the way, the positive electrode current collecting lead 10 is made of aluminum which has excellent corrosion resistance against non-aqueous electrolyte and is easy to handle, and the negative electrode current collecting lead 11 is made of nickel. Yes. On the other hand, as described above, the positive electrode side core material 30 is formed of aluminum, and the negative electrode side core material 31 is formed of copper. Therefore, since the positive electrode current collecting lead 10 and the positive electrode side core member 30 are the same material, they can be easily joined by resistance welding. On the other hand, the negative electrode current collecting lead 11 made of nickel is joined to the negative electrode side core material 31 made of copper by laser welding or ultrasonic welding. However, both laser welding and ultrasonic welding require large-scale equipment. Especially in ultrasonic welding, since the horn that irradiates ultrasonic waves is heavily worn, it is necessary to replace this horn early and mass production There is a problem.
[0029]
Therefore, in the above embodiment, the surface of the negative electrode side core material 31 at least where the negative electrode current collecting lead 11 is welded is subjected to surface treatment so that the surface is roughened. As a result, the negative electrode current collecting lead 11 and the negative electrode side core material 31 have a contact resistance that is increased by roughening, and can be joined without any problem by resistance welding. The nonaqueous electrolyte battery of the above embodiment is It is possible to mass-produce with good productivity while reducing costs.
[0030]
5 (a) to 5 (e) show different types of positive and negative current collecting leads 10 and 11 that can be suitably used in the non-aqueous electrolyte battery of the above embodiment. These can be used for both positive electrode current collection and negative electrode current collection, but will now be described as a positive electrode current collection lead 10. (A) The positive electrode current collecting lead 10 is formed into a shape integrally having a rectangular positive electrode side connection portion 12 at an end portion of the positive electrode side lead piece portion 15 by molding using a mold. It can be mass-produced with high productivity.
[0031]
The positive electrode current collecting lead 10 in (b) is formed by molding using a mold in the same manner as in (a), and then the boundary between the thin strip-shaped portion in the positive electrode side connecting portion 12 and the lead piece portion. The tapered surface 34 is formed by trimming the portion. In the positive electrode current collecting lead 10, in addition to obtaining the effect of mass production with high productivity as in the case of (a), the connecting portion 12 and the lead when the lead piece portion 15 is bent during assembly. There exists an advantage which can prevent reliably the cutting | disconnection and crack which are easy to occur in the boundary part with the piece part 15 by the taper surface 34. FIG.
[0032]
(C) The positive electrode current collecting lead 10 is overlapped by alternately folding the end portions of the thin strip-like lead piece portions 15 in opposite directions, and then crushing the overlapped portion by pressure processing. Thus, the connecting portion 12 is formed. The positive current collecting lead 10 in (d) is obtained by winding the end portions of the thin strip-shaped lead piece portions in a spiral shape and then superimposing them, and then crushing the overlapped portion by pressure processing to connect the connecting portion 12. Is formed. Each of the positive electrode current collecting leads 10 of (C) and (d) can form a lead piece portion 15 by simply cutting a metal foil into a thin strip shape, for example, and bends at the end of the lead piece portion 15. In addition, the connecting portion 12 can be formed simply by applying pressure processing, and in particular, since the positive electrode current collecting lead 10 is made of aluminum having excellent workability, the connecting portion 12 can be easily formed. It can be mass-produced with good productivity.
[0033]
The positive electrode current collecting lead 10 in (e) is one in which, for example, a rectangular connecting portion 12 is attached to an end portion of a lead piece portion 15 formed by cutting a metal foil into a simple thin strip shape by an adhesive means or the like. In addition, since there is no need to perform molding processing, bending and pressurizing processing using a mold, it is possible to mass-produce a product having a required shape with high productivity.
[0034]
【The invention's effect】
As described above, according to the nonaqueous electrolyte battery of the present invention, the lead is provided with a connecting portion for welding having a large thickness at the other end of the lead piece of the positive and negative current collecting leads. Even if the thickness of one part is set as thin as possible, it can be joined by resistance welding to the sealing plate with a large thickness through the connecting part without causing defects such as cracks and perforations. Bonding strength and mechanical strength can be secured. While obtaining this effect, the lead piece portions of the positive and negative current collecting leads can be made as thin as possible as described above. It is possible to improve the battery capacity per unit volume by reducing the thickness of each lead piece portion of the lead.
[0035]
Further, according to the method for producing a non-aqueous electrolyte battery of the present invention, the thick connecting portion provided at the other end of the lead piece portion of the aluminum positive electrode current collecting lead is formed on the aluminum sealing plate made of the same material. Joined by welding, the thick connecting part provided at the other end of the lead piece of the nickel negative electrode current collecting lead is joined by welding to the negative electrode terminal that is insulated from the sealing plate by an insulating gasket. The non-aqueous electrolyte battery of the present invention can be manufactured with good productivity while preventing the occurrence of problems.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a nonaqueous electrolyte battery according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing the same nonaqueous electrolyte battery.
FIG. 3A is a perspective view showing a state in which the lead in the above nonaqueous electrolyte battery is connected to the core of the electrode plate, and FIG. 3B is a conventional nonaqueous electrolyte battery shown for comparison. The perspective view which shows the state which connected the lead | read | reed to the core material of the electrode plate.
4A is a longitudinal sectional view showing a state in which the positive electrode current collecting lead is resistance-welded to the sealing plate in the manufacturing process of the nonaqueous electrolyte battery, and FIG. 4B is a cut side view after assembly.
FIGS. 5A to 5E are a perspective view or an exploded perspective view showing positive and negative current collecting leads of different types in the nonaqueous electrolyte battery of the same.
6A and 6B are a partial longitudinal sectional view and a side view showing a manufacturing process of a conventional non-aqueous electrolyte battery.
[Explanation of symbols]
9 Electrode group 8 Battery case 10 Positive electrode current collecting lead 11 Negative electrode current collecting lead 12 Positive electrode side connecting portion 13 Negative electrode side connecting portion 15 Positive electrode side lead piece portion 16 Negative electrode side lead piece portion 17 Sealing plate 20 Upper insulating gasket (insulating gasket) )
21 Negative terminal (electrode terminal)
28 Positive electrode plate 29 Negative electrode plate 30 Positive electrode side core material 31 Negative electrode side core material t1 Core material thickness t2 Lead thickness

Claims (6)

  1. A battery case that houses an electrode group and an electrolyte and serves as one electrode;
    A sealing plate electrically sealed by sealing the opening of the battery case;
    An electrode terminal which is disposed in an insulating state via an insulating gasket on the sealing plate and becomes the other electrode;
    One end of each of the positive and negative bipolar plates of the electrode group is joined to each other and taken out from the electrode group, and the other end is one or the other of the sealing plate and the electrode terminal. Each having a positive current collecting lead and a negative current collecting lead joined by resistance welding ,
    The thickness of each of the positive and negative bipolar plates is set to 8 to 20 μm,
    The positive electrode current collecting lead and the negative electrode current collecting lead are connected to the other end portion of the thin strip-shaped lead piece portion whose thickness is set to 50 μm or less, and is formed to have a larger thickness than the lead piece portion. A nonaqueous electrolyte battery characterized by comprising:
  2. Positive current collector lead and the negative electrode current collecting lead is No placement claim 1 Symbol the connecting portion to the other end of the lead piece and is formed by molding and / or trimming the shape integrally having Non-aqueous electrolyte battery.
  3. The positive current collecting lead and the negative current collecting lead are formed by connecting the other end of the thin strip-shaped lead piece part by folding or spiraling, and then applying pressure processing to form the connection part. non-aqueous electrolyte battery according to claim 1 Symbol placement was one in which the.
  4. Positive current collector lead and the negative electrode current collecting lead is claim 1 Symbol mounting the other end portion of the thin strip-like lead piece portion than the lead piece is formed by sticking a large connection of thickness Non-aqueous electrolyte battery.
  5. A step of accommodating in the battery case an electrode group in which one end portion of the lead strip portion formed in a thin strip shape in the positive electrode current collecting lead and the negative electrode current collecting lead is bonded to each core material of the positive electrode plate and the negative electrode plate; ,
    A connecting portion formed to a thickness larger than the other end of the lead piece portion of the positive electrode current collecting lead is welded to an aluminum sealing plate, and the lead of the negative electrode current collecting lead is joined. A step of joining a connecting portion formed on the other end of the one piece with a thickness larger than this to a negative electrode terminal disposed in an insulating state on the sealing plate;
    Fitting the sealing plate into the opening of the battery case and sealing the battery case;
    And a step of sealing the liquid injection hole after injecting the electrolyte from the liquid injection hole of the sealing plate into the battery case.
  6. A surface treatment is applied to at least a joining portion of the negative electrode current collecting lead in the copper core material of the negative electrode plate to roughen the surface, and one end of the lead piece portion of the negative current collecting lead is provided on the roughened core material portion. nonaqueous electrolyte manufacturing method of battery according to claim 5 Symbol placement was to join the parts resistance welding to.
JP2001346060A 2001-11-12 2001-11-12 Non-aqueous electrolyte battery and manufacturing method thereof Expired - Fee Related JP3829086B2 (en)

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Publication number Priority date Publication date Assignee Title
CN102265430A (en) * 2009-02-02 2011-11-30 株式会社杰士汤浅国际 Conductor for connecting terminals, assembled battery, and method for producing assembled battery
CN102265430B (en) * 2009-02-02 2014-07-30 株式会社杰士汤浅国际 Assembled battery and method for producing assembled battery

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