JP2003077442A - Battery and manufacturing device of battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery and a manufacturing device of the battery in which a connecting tool is not required or attachment and detachment to the connection fixture becomes easier by providing a protrusion or the like for positioning of the leads themselves or the lead and the connecting tool. SOLUTION: In the battery in which leads 2 are mutually connected in the battery pack, it is structured that a protrusion 1a is provided on the plate face of a first lead 1 and a hole 2a or a cut-out 2b is provided on the plate face of a second lead 2, and by overlapping the plates themselves of both leads 1, 2, the protrusion 1a of the first lead 1 is inserted and engaged in the hole 2a or cut-out 2b of the second lead 2, and these are mutually connected and fixed, or that protrusions 1b, 2c are provided on the plate face of each lead 1, 2 and a recessed part 3d, 3e, in which the protrusions 1b, 2c of each lead 1, 2 are to be inserted and engaged, is provided on the mounting faces 3a, 3b of a connecting tool 3 for mounting the plate of these leads 1, 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery in which a battery body made of a non-aqueous electrolyte secondary battery or the like is housed in a battery pack.

[0002]

2. Description of the Related Art In electronic devices such as mobile phones, a battery pack containing a small non-aqueous electrolyte secondary battery may be attached to the device and used as a power source. For example, as shown in FIG. 10, the battery pack is configured by housing battery cells 5 between resin battery case cases 6 and 7 which are vertically divided.
The battery cell 5 is obtained by sealing a non-aqueous electrolyte secondary battery in a thin rectangular battery cell container 5a made of aluminum and projecting a negative electrode terminal 5b from an end face on the inner side. In addition, in the battery cell 5, the entire battery cell container 5a except the portion where the negative electrode terminal 5b is projecting serves as the positive electrode terminal.

A protection circuit board 8 is arranged on the front side of the battery cell 5. The protection circuit board 8 is a circuit board on which a circuit for preventing overcharging or overdischarging of the battery cells 5 is configured. Circuit elements are mounted on the surface facing the battery cells 5, and the protection circuit board 8 on the opposite side is mounted. Positive case terminal 8a on the surface
And a negative electrode case terminal 8b. The protection circuit board 8 is connected to the positive electrode terminal of the battery cell container 5a of the battery cell 5 via the positive electrode lead 9 and also connected to the negative electrode terminal 5b of the battery cell 5 via the negative electrode lead 10 and the PTC 11. It is connected. The PTC 11 is a protection element that interrupts the circuit by becoming a high resistance when the temperature of the battery cell 5 rises abnormally. Therefore, the positive electrode terminal (battery cell container 5a) and the negative electrode terminal 5b of the battery cell 5
Will be connected to the positive electrode case terminal 8a and the negative electrode case terminal 8b through the protection circuit on the protection circuit board 8 and the PTC 11.

The battery cells 5 to which the protection circuit board 8 is connected as described above are sandwiched between the battery pack cases 6 and 7 from above and below, and the overlapping portions are heat-welded, whereby the insides of the battery pack cases 6 and 7 are welded. Is stored in. In addition, in the battery pack cases 6 and 7, the positive electrode case terminal 8a and the negative electrode case terminal 8b of the protection circuit board 8 are exposed to the outside through a window portion opened on the front end surface, whereby the battery cell 5 is exposed to the outside. I am trying to connect with the circuit.

In the case of the above battery pack, first, the negative electrode lead 1
One end of the negative electrode lead 10 is connected and fixed to one lead of the PTC 11 by spot welding.
While connecting and fixing the other end of the to the protection circuit board 8,
The other lead portion of the PTC 11 is connected and fixed to the negative electrode terminal 5b. In addition, for example, in a battery pack containing a plurality of battery cells, leads are also used to connect the terminals of these battery cells, but in this case as well, the leads may be connected to each other. Furthermore, for example, the case where a battery cell (battery main body) including one unit cell is used is shown here, but a battery main body in which a plurality of unit cells are internally connected may be used.

Conventionally, a connecting jig 4 as shown in FIG. 11 has been used to connect the negative electrode lead 10 and the lead portion of the PTC 11 or to connect other leads. The connecting jig 4 is formed by continuously forming a deep groove 4a and a shallow groove 4b, which are slightly wider than the widths of the leads 1 and 2 for connection, on the upper surface of an elongated rectangular thick plate. The deep groove 4a is a groove having a depth of about the combined thickness of the two leads 1 and 2. Further, an electrode hole 4c penetrating the back surface of the connection jig 4 is opened at an end portion on the inner side of the deep groove 4a. The shallow groove 4b is a groove formed continuously from the end on the inner side of the deep groove 4a to the inner side, and is formed to be shallower than the deep groove 4a by the plate thickness of the lead 1. Therefore, these grooves 4 which become the mounting surfaces of the leads 1 and 2
The bottom surfaces of a and 4b are stepped. Also, this shallow groove 4b is
The second lead 2 has a length slightly shorter than that of the other second lead 2.

One of the first leads 1 is fitted into the deep groove 4a of the connecting jig 4. The other second lead 2 is fitted into the shallow groove 4b. At this time, the front end of the second lead 2 overlaps the rear end of the first lead 1. Then, through the upper surface of the front end portion of the second lead 2 and the electrode hole 4c of the connection jig 4,
Spot welding is performed by pressing a welding electrode against the lower surface of the end portion on the back side of the first lead 1 and sandwiching the welding electrode, and passing an electric current between these welding electrodes. Then, the ends of the leads 1 and 2 are accurately positioned by the connecting jig 4 and connected and fixed by spot welding.

[0008]

However, in the conventional connecting jig 4, when the precision of the groove widths of the grooves 4a and 4b is strictly formed, the leads 1 and 2 are caught in these grooves 4a and 4b, There has been a problem that it is difficult to insert and remove the leads 1 and 2, and there is a possibility that the leads 1 and 2 may be bent during the insertion and removal. Further, in order to solve this problem, if the precision of the groove widths of the grooves 4a and 4b is relaxed, the positioning of the leads 1 and 2 becomes inaccurate, and the connecting and fixing portions are moved in the longitudinal direction and the width direction. Since the fixing is carried out at a misaligned or bent angle, there arises a problem that the connection fixing accuracy deteriorates.

The present invention has been made in order to cope with such a situation, and by providing a protrusion for positioning or the like between the leads or between the lead and the connecting jig, the connecting jig becomes unnecessary or the connecting jig is not connected. An object of the present invention is to provide a battery and a battery manufacturing apparatus that can be easily attached to and detached from a jig.

[0010]

According to a first aspect of the present invention, in a battery in which leads are connected to each other in a battery pack, at least one convex portion is provided on a plate surface of the first lead, and a second lead is provided. One or more recesses, holes and /
Or, a notch is provided, the plate surfaces of both of these leads overlap each other, and the convex portion of the first lead fits into the concave portion, hole and / or notch of the second lead and is mutually connected and fixed. Is characterized by.

According to the first aspect of the present invention, when the plate surface of the second lead is superposed on the plate surface of the first lead, the convex portion of the first lead has the concave portion, the hole portion and the notch of the second lead. Since it fits into the
It is possible to eliminate the positional deviation between the lead and the second lead. For example, when the convex portion of the first lead has a hemispherical shape having only one location, it is possible to reliably prevent the first lead and the second lead from being shifted and fixed in the longitudinal direction and the width direction. It is also possible to prevent the first lead and the second lead from being fixed at an angle different from a predetermined value when the convex portion has a shape other than a circular shape, an elongated shape, or when provided at two or more places. can do. Therefore, this connection work can be performed on a simple flat plate, and even if a connection jig is used, it is not necessary to fit the lead into the groove for positioning, and the work is facilitated.

According to a second aspect of the present invention, in the battery in which the leads are connected to each other in the battery pack, the plate surface of the first lead has one or more protrusions and one or more recesses, holes and / or cuts. Notches and 1 are provided on the plate surface of the second lead.
At least one concave portion, a hole portion and / or a notch and at least one convex portion are provided, the plate surfaces of both leads overlap each other, and the convex portion of the first lead is the concave portion of the second lead, the hole portion. And / or fit into the notch, and the protrusion of the second lead is fitted into the recess, hole and / or notch of the first lead and connected and fixed to each other.

According to the invention of claim 2, when the plate surface of the second lead is superposed on the plate surface of the first lead, the convex portion of the first lead has the concave portion, the hole portion and the notch of the second lead. Since the convex portion of the second lead fits into the concave portion, the hole portion and the notch of the first lead as well as the first lead portion, It is possible to eliminate the positional deviation of. That is, the first lead and the second
The lead can surely be prevented from being fixed by being displaced in the longitudinal direction and the width direction by fitting the protruding portion and the recessed portion, the hole portion, and the notch at two or more places, and is different from the predetermined one. It can also be prevented from being fixed at an angle.
Therefore, this connection work can be performed on a simple flat plate, and even if a connection jig is used, it is not necessary to fit the lead into the groove for positioning, and the work is facilitated. Moreover, these first lead and second lead are
Since the surfaces with the protrusions, recesses, holes, and notches face each other, they overlap each other, so even if the leads of the same component are overlapped with each other, both protrusions will become the recesses, holes, or notches of the other party. It is possible to fit the parts into each other, which makes it possible to reduce the number of types of parts and to standardize the processing steps of parts.

According to a third aspect of the battery manufacturing apparatus of the present invention, in the battery manufacturing apparatus for mutually connecting the leads used in the battery pack, one or more convex portions are provided on the plate surface of each lead to be connected. At the same time, the protrusions of the leads are fitted into the mounting surfaces of the connection jigs on which the plate surfaces of these leads are mounted.
It is characterized in that recesses or holes are provided at each of more than one place.

According to the third aspect of the present invention, each lead is mounted on the mounting surface of the connecting jig with the plate surface provided with the convex portion facing down, and at this time, the convex portion of the lead is mounted. Since it fits in the concave portion of the surface, the positional deviation between these leads can be eliminated by connecting and fixing in this state. For example, when the protrusions of the leads are hemispherical with only one place, it is possible to reliably prevent these leads from being shifted and fixed in the longitudinal direction and the width direction, and the protrusions other than the circular shape. In the case of the above-mentioned shape, the elongated shape, or when provided in two or more places, it is possible to prevent these leads from being fixed at an angle different from a predetermined angle. In addition, these leads do not need to be fitted into the grooves of the connecting jig for positioning, and the connecting work is facilitated.

According to a fourth aspect of the present invention, there is provided a battery manufacturing apparatus for connecting leads used in a battery pack to each other, wherein at least one recess is provided on a plate surface of each lead to be connected. , The recessed portion of each lead is fitted into the mounting surface of the connection jig for mounting the plate surface of these leads 1
It is characterized in that convex portions are provided at more than one place.

According to the fourth aspect of the present invention, each lead is mounted on the mounting surface of the connection jig with the plate surface provided with the recessed portion facing down. Since the convex portion fits in, by performing connection and fixing in this state, it is possible to eliminate the positional deviation between the leads. For example, when the recesses of the leads are hemispherical with only one location, it is possible to reliably prevent these leads from being shifted and fixed in the longitudinal direction or the width direction, and the recesses may have a shape other than a circle. It is also possible to prevent these leads from being fixed at an angle different from a predetermined value in the case of or in the case of being provided in two or more places, or in the case of an elongated shape. In addition, these leads do not need to be fitted into the grooves of the connecting jig for positioning, and the connecting work is facilitated.

According to a fifth aspect of the present invention, there is provided a battery manufacturing apparatus in which leads used in a battery pack are mutually connected, and at least one convex portion is provided on a plate surface of the first lead to be connected. Thus, the plate surface of the second lead is provided with one or more recesses, and the convex portion of the first lead is fitted to the first mounting surface of the connection jig on which the plate surface of the first lead is mounted. One or more recesses or holes are provided, and a second mounting surface on which the plate surface of the second lead is mounted is provided with one or more protrusions that fit into the recesses of the second lead. It is characterized by being done.

According to the invention of claim 5, the first lead is
The plate surface provided with the convex portion is placed downward, and the convex portion is mounted so as to fit into the concave portion or the hole portion of the first mounting surface of the connection jig, and the second lead is provided with the concave portion. Face down,
By placing the connecting jig so that the convex portion of the first mounting surface fits in the concave portion, it is possible to eliminate the positional deviation between the leads. For example, in the case where the first lead and the convex portion of the second mounting surface are hemispherical in only one place, it is ensured that the first lead and the second lead are displaced in the longitudinal direction and the width direction and fixed. It is also possible to prevent these leads from being fixed at an angle different from the predetermined one when the convex part has a shape other than a circular shape, an elongated shape, or when it is provided at two or more places. can do. In addition, these leads do not need to be fitted into the grooves of the connecting jig for positioning, and the connecting work is facilitated.
In addition, if the convex portion of the first lead projects toward the side where the second lead and the second lead are superposed, it is possible to eliminate extra protrusion in the thickness direction of the entire lead after connection by the convex portion. . This also applies to the case where the recess of the second lead forms a protrusion on the opposite surface.

According to a sixth aspect of the present invention, there is provided a battery manufacturing apparatus in which leads used in a battery pack are connected to each other, and at least one recess is provided on a side surface of each lead to be connected. The mounting surface of the connection jig for mounting the plate surfaces of these leads is provided with one or more convex portions that are fitted laterally into the concave portions of each lead.

According to the sixth aspect of the present invention, when the lead surface of each lead is mounted on the mounting surface of the connection jig, the convex portion of the mounting surface fits into the concave portion of the side surface. By fixing the connection in this state, it is possible to eliminate the positional deviation between these leads. If there are one or more recesses in each lead, the protrusions of the mounting surface are fitted into the recesses, respectively, to reliably prevent the leads from being shifted and fixed in the longitudinal direction or the width direction. be able to. Further, if these recesses or recesses are staggered on both sides at two or more places, preferably at three or more places, the leads can be prevented from being fixed at an angle different from a predetermined angle. Furthermore, if there are two or more convex portions, it is not necessary to fit all the convex portions into the concave portions of the leads, and the bending of the angle can be eliminated by merely contacting the side surfaces of the leads.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show a first embodiment of the present invention, and FIG. 1 is a partially enlarged perspective view showing before and during connection of two leads having a convex portion and a hole portion. FIG. 2 is a partially enlarged perspective view showing before and during connection of two leads having a convex portion and a notch, and FIG. 3 is before connection of two leads having a convex portion and a flask-shaped notch. And a partially enlarged perspective view showing the state of connection, and FIG. 4 shows two projections, holes and cutouts.
FIG. 6 is a partially enlarged perspective view showing before and during connection of the leads. The constituent elements having the same functions as those of the conventional example shown in FIGS. 10 to 11 are designated by the same reference numerals.

In this embodiment, the leads connected to each other in the battery pack will be described. The leads that make the connection are
It may be connected to a terminal of the battery body, a case terminal, a protective element, or the like, or may be a lead portion of a protective element such as PTC. As shown in FIG. 1 (a), the first lead 1 on one side has a convex portion 1 a at the end of the plate surface facing upward.
Is provided. The convex portion 1a is a protrusion protruding in a hemispherical shape from the plate surface of the first lead 1, and can be formed, for example, by pressing from below with a punch having a hemispherical tip. The other second lead 2 is provided with a hole 2a penetrating the plate surface at the end thereof. This hole 2a
Is a round hole having a size in which the hemispherical diameter of the convex portion 1a of the first lead 1 fits with almost no gap.

When the end portion of the second lead 2 is superposed on the end portion of the first lead 1 so that the convex portion 1a fits into the hole portion 2a as shown in FIG. 1 (b). The positions of the leads 1 and 2 in the longitudinal direction and the width direction are determined within the accuracy error of the formation position and size of the convex portion 1a and the hole portion 2a. Therefore, if the overlapping portion is connected and fixed by spot welding or the like in this state, without using a connecting jig,
The leads 1 and 2 can be accurately positioned in the longitudinal direction and the width direction. Further, if the leads 1 and 2 are connected and fixed along a connecting jig having a straight side surface, the leads 1 and 2 can be connected in a straight line and fixed at a bent angle. Nothing goes away.

In the above embodiment, the case where the convex portion 1a of the first lead 1 has a hemispherical shape has been described.
The shape is arbitrary, and the circular shape may be a conical shape, a cylindrical shape, or the like, or a polygonal pyramid shape, a polygonal pillar shape, or the like. Further, for example, it may have an elongated shape along the longitudinal direction of the first lead. The hole 2a of the second lead 2 usually has a shape corresponding to the convex portion 1a, but when the convex portion 1a is circular, for example, it can be a polygonal shape circumscribing the circular shape. When the portion 1a has a polygonal shape, for example, it may have a circular shape circumscribing the polygon.

In the above embodiment, the case where the second lead 2 is provided with the hole 2a penetrating the plate surface has been described.
It is also possible to provide a concave portion corresponding to the convex portion 1a of the first lead 1. For example, in the case of the second lead 2 shown in FIG. 1, by pressing from below with a punch having a hemispherical tip, it is possible to provide a concave portion into which the convex portion 1a is fitted on the plate surface facing downward. Such a recess is formed in the hole 2
Similar to the case of a, the shape may be any shape suitable for the convex portion 1a.

Further, the second lead 2 may be provided with a notch 2b as shown in FIG. 2 (a). The notch 2b is a slit provided by cutting in a U shape from the end face side of the second lead 2, and the slit width is the first.
It is provided slightly wider than the hemispherical diameter of the convex portion 1a of the lead 1. Such a notch 2 in the second lead 2
2b, even if the protrusion 1a is fitted into the notch 2b as shown in FIG.
2 becomes slidable in the longitudinal direction. However, the convex portion 1a
If the semicircular portion at the back of the notch 2b is brought into contact with the second lead 2, the second lead 2 will not move to the first lead 1 side any more. Therefore, by performing connection and fixing in this state, It becomes possible to perform accurate positioning. The shape at the back of the notch 2b can be any shape suitable for the convex portion 1a, as in the case of the hole 2a.

Further, the second lead 2 may be provided with a flask-shaped notch 2b as shown in FIG. 3 (a). The notch 2b has a shape in which a slot is formed from the end face side of the second lead 2 in a through hole similar to the hole 2a of the above-described embodiment, and the width of this slot is sufficiently larger than the diameter of the through hole. It is narrowing. When the second lead 2 is provided with the flask-shaped cutout 2b, as shown in FIG. 3B, the projection 1a is fitted into the through hole at the back of the cutout 2b. As in the case where 1a is provided, accurate positioning can be performed. The shape of the through hole at the back of the notch 2b can be any shape suitable for the convex portion 1a, as in the case of the hole portion 2a.

Further, in the above embodiment, the case where the protrusions 1a and the holes 2a and the like are provided at each of the ends for connecting and fixing the leads 1 and 2 has been described, but these should be provided at a plurality of positions. You can also For example, in the case shown in FIG. 4A, the first lead 1 is provided with two convex portions 1a, and the second lead 2 is provided with one hole portion 2a and one notch portion 2b. Then, these leads 1 and 2 are overlapped with each other, and as shown in FIG.
While being fitted in a, the other convex portion 1a is fitted in the notch 2b to be connected and fixed. Thus, the convex portion 1a and the hole portion 2a
When multiple parts are provided, the first lead 1 and the second lead 2 will be connected in a straight line when they are fitted, and they can be fixed at a bent angle without using a connecting jig. Can be prevented. Further, even when the convex portion 1a, the hole portion 2a, and the like are provided at one place, the same effect can be obtained by making the convex portion 1a, the hole portion 2a, and the like elongated. Further, even when the convex portion 1a and the hole portion 2a are formed into polygons, the effect of preventing fixation at a bent angle can be obtained.

Further, in FIG. 4, the first lead 1 has a convex portion 1
Although the case where only a is provided and only the hole 2a is provided in the second lead 2 has been shown, the first lead 1 and the second lead 2 are shown.
It is also possible to provide both the convex portion 1a, the hole portion 2a, and the like on each. For example, the first lead 1 and the second lead 2
Both have a notch on the tip side and a convex part on the front side, and if these ends are overlapped face to face, both convex parts will fit in the notch of the other side. Therefore, accurate positioning can be performed. Moreover, the first lead 1 and the second lead 2 are
Since the shapes of the end portions are the same, it is possible to use both as a common component, or to share the processing steps of the convex portion and the notch even for different components.

FIGS. 5 to 6 show a second embodiment of the present invention, and FIG. 5 is provided with a ridge-shaped convex portion for connection using a connection jig having a groove-shaped concave portion. FIG. 6 is a partially enlarged perspective view showing before and after mounting of the lead, and FIG. 6 is a portion showing before and after mounting of the lead having a convex portion for connection using a connecting jig having a hole portion. It is an expansion perspective view. It should be noted that constituent members having the same functions as those of the first embodiment shown in FIGS. 1 to 4 and the conventional example shown in FIG.

In this embodiment, an apparatus for connecting leads used in a battery pack to each other will be described. Similar to the case of the first embodiment, these leads may be single leads or may be lead portions of elements or the like. As shown in FIG. 5 (a), the first lead 1 and the second lead 2 are provided with convex portions 1b and 2c at the central portion in the width direction along the longitudinal direction except for the end portion for connecting and fixing. ing. These convex portions 1b and 2c are elongated ridge-shaped projections having a semicircular cross section that are long in the longitudinal direction and project downward from the plate surfaces of the leads 1 and 2 facing downward. Such protrusions 1b and 2c can be formed, for example, by pressing from the upper surface side with a punch having a cylindrical peripheral side surface.

The leads 1 and 2 are connected and fixed using a connecting jig 3. The connection jig 3 includes leads 1 for connection.
The first mounting surface 3a, the second mounting surface 3b, and the contact portion 3c are formed on the upper surface of an elongated rectangular thick plate having a width substantially similar to that of the second embodiment. The first mounting surface 3a is the lowest plane on the upper surface of the connection jig 3, and is provided with a recessed portion 3d in the widthwise central portion along the longitudinal direction except for the end portion on the back side. The second mounting surface 3b is a plane that is formed higher than the first mounting surface 3a by the plate thickness of the lead 1 and is arranged on the back side,
A recess 3 is formed in the central portion in the width direction over the entire length along the longitudinal direction.
e is provided. The second mounting surface 3b is formed to have a length slightly shorter than that of the second lead 2. These recesses 3d and 3e are elongated grooves having an inverted triangular cross section.
The contact portion 3c is an end portion of the connection jig 3 which is formed sufficiently higher on the inner side than the second mounting surface 3b. Further, an electrode hole 3f penetrating the back surface of the connection jig 3 is opened at an end portion on the back side of the first mounting surface 3a.

As shown in FIG. 5B, the first lead 1 is placed on the first placing surface 3a of the connecting jig 3 and
The lead 2 is mounted on the second mounting surface 3b of the connection jig 3. At this time, the convex portion 1b of the first lead 1 is not attached to the first mounting surface 3
The convex portion 2c of the second lead 2 is fitted into the concave portion 3d of a.
Fits into the recess 3e of the second mounting surface 3b. Recess 3
d and 3e are provided as grooves that are substantially circumscribing the protruding peripheral surfaces of the protrusions 1b and 2c when the leads 1 and 2 are mounted on the mounting surfaces 3a and 3b. 1 and 2 are accurately positioned on the connecting jig 3 in the width direction and angle. The first lead 1 has a mounting surface 3 at the end on the back side.
The position in the longitudinal direction is determined by contacting the stepped portions of a and 3b, but the position in the longitudinal direction can also be determined by fitting the convex portion 1b into the concave portion 3d. The position of the second lead 2 in the longitudinal direction is determined by the end on the back side contacting the contact portion 3c. In the first lead 1 thus mounted on the connection jig 3, the end portion on the back side where the convex portion 1b is not provided reaches the first mounting surface 3a where the concave portion 3d is not provided, This covers the electrode holes 3f. Further, the second lead 2 has its front end portion over the second mounting surface 3b and overlaps with the rear end portion of the first lead 1. Therefore, if spot welding or the like is performed on the overlapping portions of the leads 1 and 2 in this state, the leads 1 and 2 can be accurately positioned and connected and fixed. That is, the leads 1 and 2 are not only positioned in the longitudinal direction and the width direction by fitting the elongated protrusions 1b and 2c into the recesses 3d and 3e, but also can be connected in a straight line and bent angles. It will not be fixed in.

The cross-sectional shape of the protrusions 1b and 2c of the leads 1 and 2 is not limited to the semicircular shape as described above, but may be any shape such as an inverted triangle shape or a quadrangular shape. Further, the cross-sectional shape does not necessarily have to be the same in the longitudinal direction.
The concave portions 3d and 3e of the connection jig 3 are the convex portions 1b and 2c.
However, the semicircular convex portions 1b and 2c may have a circumscribed shape such as an inverted triangle. Further, instead of these recesses 3d and 3e, holes that penetrate the back surface of the connecting jig 3 may be used.

In the above embodiment, the case where the protrusions 1b and 2c of the leads 1 and 2 are elongated protrusions is shown, but they may be hemispherical protrusions as shown in FIG. 6 (a). .
These protrusions 1b and 2c are the same as the first embodiment shown in the first embodiment.
The protrusion is the same as the convex portion 1a of the lead 1, but the lead 1,
It projects downward from the lower surface of 2. The protrusions 1b and 2c may be provided at one location on each of the leads 1 and 2, or may be provided at a plurality as shown in FIG. 6 (a). In this case, the connecting jig 3 may be provided with elongated groove-shaped recesses 3d and 3e similar to those shown in FIG. 5A, but as shown in FIG. ，
It is also possible to provide 3h. These holes 3g, 3h
Is a through hole having a diameter slightly larger than the hemispherical diameter of the protrusions 1b and 2c provided corresponding to the protrusions 1b and 2c of the leads 1 and 2. In this case, FIG. 6 (b)
As shown in FIG. 2, the leads 1 and 2 are mounted on the mounting surface 3 of the connection jig 3 by fitting the protrusions 1b and 2c into the holes 3g and 3h.
It can be positioned on a, 3b. That is, the convex portion 1
If the holes b, 2c and the holes 3g, 3h are provided one by one, the positioning in the longitudinal direction and the width direction can be performed.
It is also possible to connect them straight by arranging the side surfaces of the connection jig 2 and the connection jig 3. Also, the protrusions 1b and 2c and the hole 3
If g and 3h are provided at each of a plurality of positions, it is possible to perform positioning in the longitudinal direction, the width direction, and the angle. The convex portions 1b and 2c in this case can also have an arbitrary shape, like the convex portion 1a of the first lead 1 shown in the first embodiment.
The holes 3g and 3h can also have any shape suitable for the protrusions 1b and 2c. Also, the holes 3g and 3h
Instead of this, a concave portion into which the convex portions 1b and 2c are fitted can be used.

FIGS. 7 to 8 show a third embodiment of the present invention. FIG. 7 shows a groove-shaped concave portion for connection using a connection jig having a ridge-shaped convex portion. FIG. 8 is a partially enlarged perspective view showing before and after mounting the lead. FIG. 8 is a partially enlarged view showing before and after mounting the lead having a concave portion for connection using a connecting jig having a convex portion. It is a perspective view. It should be noted that constituent members having the same functions as those of the first and second embodiments shown in FIGS. 1 to 6 and the conventional example shown in FIG.

In this embodiment, as in the second embodiment, a device for connecting leads used in a battery pack to each other will be described. Similar to the case of the first embodiment, these leads may be single leads or may be lead portions of elements or the like. As shown in FIG. 7 (a),
The first lead 1 and the second lead 2 are provided with recesses 1c and 2d in the central portion in the width direction along the longitudinal direction except the ends for connecting and fixing. These recesses 1c, 2d
Is an elongated groove having a semicircular cross section that is long in the longitudinal direction and is recessed upward from the plate surface of the leads 1 and 2 facing downward. Such recesses 1c and 2d can be formed, for example, by pressing from the lower surface side with a punch having a cylindrical peripheral side surface shape.

The connecting jig 3 for connecting and fixing the leads 1 and 2 has the same structure as that shown in the second embodiment.
However, the first mounting surface 3a is provided with a convex portion 3i in the central portion in the width direction along the longitudinal direction except for the end portion on the back side. Further, the second mounting surface 3b is provided with a convex portion 3j at the center in the width direction over the entire length along the longitudinal direction.
These protrusions 3i and 3j are ridge-shaped protrusions having a triangular cross section and elongated in the longitudinal direction.

The first lead 1 is placed on the first placing surface 3a of the connecting jig 3 as shown in FIG.
The lead 2 is mounted on the second mounting surface 3b of the connection jig 3. At this time, the convex portion 3i of the first mounting surface 3a is fitted into the concave portion 1c of the first lead 1, and the concave portion 2d of the second lead 2 is formed.
The convex portion 3j of the second mounting surface 3b is fitted in the. Recess 1
Since c and 2d are provided as grooves that are substantially circumscribed on the protruding triangular slopes of the convex portions 3i and 3j when the leads 1 and 2 are mounted on the mounting surfaces 3a and 3b, respectively. The leads 1 and 2 are accurately positioned on the connection jig 3. However, the position in the longitudinal direction is determined similarly to the case of the second embodiment. In this state, if spot welding or the like is performed on the overlapping portions of the leads 1 and 2, the leads 1 and 2 can be accurately positioned and connected and fixed. That is, the leads 1 and 2 have elongated recesses 1c and 2d.
By fitting the convex portions 3i and 3j into the ridges, not only the positioning in the longitudinal direction and the width direction can be performed, but also they can be connected in a straight line and are not fixed at a bent angle.

The cross-sectional shapes of the recesses 1c and 2d of the leads 1 and 2 and the cross-sectional shapes of the projections 3i and 3j of the connection jig 3 are arbitrary shapes that fit with each other, as in the second embodiment. Can be

In the above embodiment, the case where the convex portions 3i and 3j of the connecting jig 3 are elongated protrusions is shown.
As shown in (a), it may be a hemispherical protrusion. These protrusions 3i and 3j are protrusions having the same shape as the protrusion 1a of the first lead 1 shown in the first embodiment. These protrusions 3i and 3j may be provided on each of the mounting surfaces 3a and 3b of the connection jig 3 at one place, or may be provided at a plurality of places as shown in FIG. 8 (a). In this case, lead 1,
2 can be provided with elongated groove-shaped recesses 1c and 2d similar to those shown in FIG. 7A, but can also be provided with recesses 1c and 2d as shown in FIG. 8A. . These concave portions 1c and 2d are the convex portions 3i and 3 of the connecting jig 3, respectively.
It is a hemispherical depression slightly larger than the hemispherical diameter of these convex portions 3i, 3j provided corresponding to j.
In this case, as shown in FIG. 8B, the leads 1 and 2 are positioned on the mounting surfaces 3a and 3b of the connection jig 3 by fitting the protrusions 3i and 3j into the recesses 1c and 2d. You can That is, if the concave portions 1c and 2d and the convex portions 3i and 3j are provided one at a time, the positioning in the longitudinal direction and the width direction can be performed, and the leads 1 and 2 and the connection jig 3 can be aligned by aligning the side surfaces. You can also connect to. Further, if the concave portions 1c and 2d and the convex portions 3i and 3j are provided at a plurality of positions, respectively, the longitudinal direction, the width direction, and the angle can be positioned. The protrusions 3i and 3j in this case can have any shape, like the protrusions 1a of the first lead 1 shown in the first embodiment, and the recesses 1c and 2d can also have these recesses 1c and 2d. It can be any shape suitable for.

In the second and third embodiments, the first lead 1 and the second lead 2 are both provided with only the concave portion or the convex portion, and the first mounting surface 3a of the connection jig 3 and the second mounting surface are provided. Although the case where only the convex portion or the concave portion is also provided on the placing surface 3b is shown, for example, the concave portion is provided on the first lead 1 and the second placing surface 3b, and the second lead 2 and the first placing surface 3a are provided. Even if the convex portion is provided, accurate positioning can be performed. Moreover, in this case, since the convex portion of the second lead 2 projects downward, it is arranged in the same direction as the plate thickness of the first lead 1 connected to the lower side of the second lead 2, and after the connection. It is possible to prevent the total thickness of both the leads 1 and 2 from being significantly thicker than the total thickness of the two leads 1 and 2 by the convex portion. Also, the first lead 1
The same applies to the case where the concave portion is formed with a protrusion on the upper surface side by press working.

FIG. 9 shows a fourth embodiment of the present invention, in which a lead having a concave portion on the side surface to be connected by using a connecting jig having a convex portion on the side surface is used. It is a partial expansion perspective view which shows the back. The first to the first shown in FIGS.
Constituent members having the same functions as those in the third embodiment and the conventional example shown in FIG. 11 are designated by the same reference numerals.

In this embodiment as well, similar to the second and third embodiments, an apparatus for mutually connecting the leads used in the battery pack will be described. Similar to the case of the first embodiment, these leads may be single leads or may be lead portions of elements or the like. As shown in FIG. 9A, the first lead 1 and the second lead 2 are provided with concave portions 1d and 2e on their side surfaces, respectively. These recesses 1d and 2e are recesses formed by cutting the side surfaces of the leads 1 and 2 in the width direction in a triangular shape, and usually a plurality of recesses are provided in each of the leads 1 and 2. However, the first lead 1
The concave portion 1d of FIG.
Only the points are shown.

The connecting jig 3 for connecting and fixing the leads 1 and 2 is provided with a first mounting surface 3a and a second mounting surface on an upper surface of an elongated rectangular thick plate which is sufficiently wider than the connecting leads 1 and 2. Surface 3
b is formed. The mounting surfaces 3a and 3b are flat surfaces with steps similar to those in the second and third embodiments, and the convex portions 3k are provided on the side portions of the first mounting surface 3a at a plurality of locations and at the same time. 2 The protrusions 3 are provided on the side portions of the mounting surface 3b at a plurality of locations.
m is provided. However, the convex portion 3 of the first mounting surface 3a
Since k is omitted from the drawing, only one place is shown in FIG. These convex portions 3k and 3m are placed on the mounting surface 3
The protrusions are cylindrical protrusions protruding from the surfaces of a and 3b, and may be integrally formed with the connecting jig 3, or may be provided by embedding and fixing a pin or the like.

The first lead 1 is mounted on the first mounting surface 3a of the connection jig 3 as shown in FIG.
The lead 2 is mounted on the second mounting surface 3b of the connection jig 3. At this time, the convex portion 3k of the first mounting surface 3a is laterally fitted into the concave portion 1d of the first lead 1, and the convex portion of the second mounting surface 3b is fitted into the concave portion 2e of the second lead 2. 3m fits in from the side. The leads 1 and 2 are placed on the mounting surface 3 of the recesses 1d and 2e.
The protrusions 3k and 3 are mounted on the a and 3b at correct positions.
These leads 1 and 2 are accurately positioned on the connection jig 3 because they are provided as dents that are substantially circumscribed on the peripheral side surface of m. However, the concave portions 1d and 2e and the convex portion 3
When k and 3m are provided only in two places or when three or more places are not provided alternately on both sides in the width direction, the leads 1 and 2 are placed on the mounting surfaces 3a and 3b on one side in the rotation direction. Since it is possible to move the projections 3k and 3m, it is necessary that the projections 3k and 3m are pressed against the recesses 1d and 2e.
In this state, if spot welding or the like is performed on the overlapping portions of the leads 1 and 2, the leads 1 and 2 can be accurately positioned and connected and fixed. Also, the recesses 1d, 2
It is also possible to provide e and the convex portions 3k and 3m only at one place. In this case, the leads 1 and 2 are able to move on the mounting surfaces 3a and 3b in a freely and freely movable manner, but if the projections 3k and 3m are locked in the recesses 1d and 2e, Positioning can be performed at least in the longitudinal direction and the width direction. Then, connect the leads 1 and 2 to the connection jig 3
Other positioning can be performed by, for example, following the side surface of the.

The shapes of the recesses 1d and 2e of the leads 1 and 2 and the shapes of the protrusions 3k and 3m of the connecting jig 3 are the second and the third.
As in the case of the above embodiment, it may have any shape that fits with each other. Further, since the protrusions 3k and 3m may be protrusions in the side surface direction which fit into the recesses 1d and 2e, for example, from the edges standing on both sides of the upper surface of the wide connection jig 3 toward the inside. It may be a protruding protrusion.

Further, in the above-mentioned first to fourth embodiments, the case where the ends of the leads 1 and 2 are connected and fixed to each other has been described, but the connecting portion does not necessarily have to be the end. Also, the leads 1 and 2 to be connected are not limited to the case where they are connected in a straight line with their longitudinal directions aligned, and for example, the leads 1 and 2 which are orthogonal to each other
The same can be implemented when connecting and fixing the two.

In the first to fourth embodiments described above, the case where the leads 1 and 2 are connected and fixed by spot welding or the like has been described, but ultrasonic welding or the like may be used as a welding method other than spot welding. As another method for connecting and fixing, soldering, brazing, pressure welding or the like can be used.

[0052]

As is apparent from the above description, according to the battery and the battery manufacturing apparatus of the present invention, the convex portions of the leads are fitted into the concave portions or the convex portions or the concave portions of the leads. By fitting the concave portion and the convex portion on the mounting surface of the connecting jig, it becomes possible to connect and fix the leads without causing positional displacement of these leads. Therefore, it is not necessary to use a conventional connecting jig, or the leads can be easily attached to and detached from the connecting jig.

[Brief description of drawings]

FIG. 1 is a partially enlarged perspective view showing a first embodiment of the present invention and showing before and during connection of two leads having a protrusion and a hole.

FIG. 2 shows the first embodiment of the present invention and is a partially enlarged perspective view showing before and during connection of two leads having a protrusion and a notch.

FIG. 3 is a partially enlarged perspective view showing a first embodiment of the present invention and showing before and during connection of two leads having a convex portion and a flask-shaped cutout.

FIG. 4 shows the first embodiment of the present invention, in which 2
FIG. 3 is a partially enlarged perspective view showing before and at the time of connecting two leads having a convex portion and a hole portion or a notch provided at a location.

FIG. 5 is a view showing a second embodiment of the present invention, in which a lead having ridge-shaped projections for connection using a connection jig provided with groove-shaped recesses is mounted before and mounting. It is a partial expansion perspective view which shows the back.

FIG. 6 is a view showing a second embodiment of the present invention, and is a partial enlarged view showing a lead having a convex portion for connection using a connecting jig having a hole portion before and after mounting. It is a perspective view.

FIG. 7 is a view showing a third embodiment of the present invention, in which a lead having groove-shaped recesses for connection using a connection jig provided with ridge-shaped projections is mounted before and after mounting. It is a partial expansion perspective view which shows the back.

FIG. 8 shows a third embodiment of the present invention, and is a partially enlarged perspective view showing a lead having a concave portion for connection using a connecting jig having a convex portion before and after mounting the lead. It is a figure.

FIG. 9 is a view showing a fourth embodiment of the present invention, in which a lead having a concave portion on the side surface to be connected by using a connecting jig having a convex portion on the side surface is mounted before and after mounting. It is a partial expansion perspective view shown.

FIG. 10 is an exploded perspective view showing a structure of a battery pack using leads, showing a conventional example.

FIG. 11 is a partial enlarged perspective view showing a conventional example before and after mounting of leads for connection using a connecting jig provided with a groove.

[Explanation of symbols]

1st lead 1a convex part 1b convex part 1c recess 1d recess 2 second lead 2a hole 2b cutout 2c convex part 2d recess 2e Recess 3 connection jig 3a First mounting surface 3b Second mounting surface 3d recess 3e Recess 3g hole 3i convex part 3j convex part 3k convex part 3m convex part

Continued front page    (72) Inventor Kenji Yabino             5 Nitta Ichinodancho, Kichijoin, Minami-ku, Kyoto-shi, Kyoto Prefecture             Within GS Melcotech Co., Ltd. F term (reference) 5H022 AA19 BB03 BB28 CC13 EE01                 5H040 AA03 AA22 AY04 DD07 JJ06

Claims (6)

[Claims] 1. In a battery in which leads are connected to each other in a battery pack, at least one convex portion is provided on a plate surface of the first lead, and at least one concave portion is provided on a plate surface of the second lead, Hole and /
Or, a notch is provided, the plate surfaces of both of these leads overlap each other, and the convex portion of the first lead fits into the concave portion, hole and / or notch of the second lead and is mutually connected and fixed. A battery characterized by. 2. A battery in which leads are connected to each other in a battery pack, wherein a plate surface of the first lead is provided with one or more convex portions and one or more concave portions, holes and / or notches. At the same time, the plate surface of the second lead is provided with one or more concave portions, holes and / or notches and one or more convex portions, and the plate surfaces of both of these leads are overlapped with each other to form the convex portion of the first lead. The portion fits into the recess, hole and / or notch of the second lead, and the protrusion of the second lead fits into the recess, hole and / or notch of the first lead, and are connected and fixed to each other. Batteries characterized by being made. 3. A battery manufacturing apparatus for connecting leads used in a battery pack to each other, wherein each of the leads to be connected is provided with one or more protrusions on the plate surface, and the plate surfaces of the leads are connected to each other. A battery manufacturing apparatus characterized in that the mounting surface of a connection jig for mounting the battery is provided with one or more recesses or holes in which the protrusions of the leads fit. 4. In a battery manufacturing apparatus for connecting leads used in a battery pack to each other, one or more recesses are provided on the plate surface of each lead to be connected, and the plate surfaces of these leads are connected to each other. A battery manufacturing apparatus, wherein the mounting surface of a mounting jig to be mounted is provided with one or more convex portions that fit into the concave portions of each lead. 5. A battery manufacturing apparatus for connecting leads used in a battery pack to each other, wherein the plate surface of the first lead to be connected is provided with one or more protrusions, and the plate surface of the second lead is provided. Is provided with one or more recesses, and the projections of the first leads are fitted into the first mounting surface on which the plate surface of the first leads of the connection jig is mounted.
Recesses or holes are provided at each of more than one place, and one or more protrusions that fit into the recesses of the second lead are provided on the second mounting surface on which the plate surface of the second lead is placed. A battery manufacturing apparatus characterized by the above. 6. A battery manufacturing apparatus for connecting leads used in a battery pack to each other, wherein at least one recess is provided on a side surface of each lead to be connected, and plate surfaces of these leads are mounted. A battery manufacturing apparatus, characterized in that, on a mounting surface of a connecting jig to be placed, one or more convex portions that are fitted laterally into concave portions of each lead are provided.