JP2008034213A - Conductive coupling structure of conductive handle for lithium-ion secondary battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conductive coupling structure of a conductive handle for a lithium-ion secondary battery capable of coupling each conductive handle and a conductive terminal without relying on a welding work, with a manufacturing process more simplified, an assembly work made more easy, and with capital investment reduced. <P>SOLUTION: A lead-out terminal is provided with an assembly zone with conductivity, in correspondence with a cathode and an anode conductive handles at either end of polar windings, and an electric coupling work of each conductive handle with the lead-out terminal does not have to be welded, since, when a tying port of a tying member is fitted into an outer periphery of each conductive handle and gradually contracted, a tying band, the assembly zone and either the cathode conductive handle or the anode conductive handle come in close contact with one another, especially, electric coupling of the cathode/anode conductive handle and the lead-out terminal being carried out by the tying member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a conductive connection structure of a conductive pattern for a lithium ion secondary battery, and more particularly to a connection structure of a conductive pattern lead-out from a pole winding and a conductive terminal of a lithium ion secondary battery.

At present, a conventional lithium ion secondary battery has a configuration proposed in US Pat. No. 5,849,431, and as shown in FIGS. 1 and 2, its pole winding 10 has one positive electrode sheet 11, one separator 12 and the like. And a plurality of conductive patterns 111 and 131 at one end of each of the positive electrode sheet 11 and the negative electrode sheet 13. Thus, the conductive patterns 111 and 131 can be joined to the outer edge of the disk-shaped conductive connector 15 by welding to lead out the electric energy of the pole winding 10. It becomes possible.

FIG. 3 shows another conventional lithium ion secondary battery structure. A plurality of conductive patterns 111a and 131a are welded to the edges of the positive electrode sheet 11a and the negative electrode sheet 13a of the pole winding 10a. In addition, the ends of the conductive patterns 111a and 131a are joined to the outer edge of the battery lead-out terminal 15a by welding, so that the electrical energy of the pole winding 10 can be read out. Become.
U.S. Patent No. 5849431

However, the electrical connection between the conductive pattern formed by integral molding or welding and the conductive terminal is made by electrically connecting the conductive pattern and the conductive terminal by welding technology. In the case of an ion secondary battery, the number of conductive patterns inside the battery is extremely large, and the impedance inside the battery drops due to the many conductive patterns, which leads to the large current of the high-capacity lithium ion secondary battery. The charging / discharging requirements can be met. However, the welding work between many conductive handles and conductive terminals requires a considerable number of man-hours and makes the manufacturing process complicated and difficult.

The main object of the present invention is to electrically connect each conductive handle and conductive terminal without performing welding work, simplifying the manufacturing process, facilitating assembly work, and reducing capital investment. Provided is a conductive connection structure of a conductive pattern for a lithium ion secondary battery that falls.

The invention of the present application made to achieve the above object is mainly characterized in that a single center bar is provided in the battery can, and two lead-out terminals are respectively fixed to both ends of the center bar. The end of the pole winding is electrically connected to the lead-out terminal by two bundling members, and the battery member and the battery can are fixed by two assembly nuts. In the lithium ion secondary battery configured as described above, the pole winding is composed of one positive electrode sheet, one negative electrode sheet, and at least one separator, and a positive electrode material and a negative electrode are formed on the surface of the positive and negative electrode sheets. Each of which is coated with a material, the separator is installed between the positive and negative electrode sheets, and one end of the positive electrode sheet is provided with a positive electrode connection zone where no positive electrode material is applied, and the positive electrode of the negative electrode sheet A negative electrode connection zone where no negative electrode material is applied is provided at one end opposite to the contact zone, the positive electrode sheet, the separator, and the negative electrode sheet are stacked in order, and the central rod is wound, The negative electrode connection zone extends from both ends of the pole winding, the lead-out terminal has a conductive structure, one end which is a connection end is coupled to the connection portion of the center rod, and the other end is output The lead-out terminal is located between the connecting end and the output end, and one convex edge and one collecting zone are formed, and the collecting zone is a positive electrode connection zone having a pole winding; Alternatively, corresponding to the negative electrode connection zone, the convex edge abuts the end cover of the battery can, and the binding member has one binding band and one assembly frame, and the inside of the assembly frame Has one locking part A plurality of tooth grooves are provided on the surface of the binding band, and when the binding member is inserted into the assembly frame, one neck is formed, and one of the tooth groove and the assembly frame is formed. Due to the direction locking (reverse check), when the narrowing port is reduced, it cannot be expanded again, and when the narrowing port of the narrowing member is fitted into the positively wound positive electrode connection zone or the negative electrode connection zone and the narrowing port is reduced, The gist of the present invention is a conductive connection structure of a conductive pattern for a lithium ion secondary battery, wherein the pole-connected positive electrode connection zone or negative electrode connection zone is in close electrical contact with the lead-out terminal gathering zone. .

In the invention of the present application, the connecting portion of the center rod is one insertion groove, the connecting end of the lead-out terminal is one insertion rod, and the insertion rod is inserted into the insertion groove and coupled. The gist of the present invention is the conductive connection structure of the conductive handle for a lithium ion secondary battery according to claim 1.

In the invention of the present application, the binding frame of the binding member is provided with one binding band and one knob, and a spiral is formed on the peripheral surface of the knob, and the spiral is the binding band. 2. The conductive connection of a conductive pattern for a lithium ion secondary battery according to claim 1, wherein when the knob is meshed with a tooth groove and the knob is rotated in a predetermined direction, the binding port of the binding band is gradually reduced. The gist is the structure.

In the invention of the present application, one airtight packing is disposed between the back end surface of the end cover and the convex edge, and between the assembly nut and the front end surface of the end cover. 2. Another airtight packing is provided, and when the assembly nut is screwed in, the space between the convex edge and the opening in the end cover is in an airtight state. The gist is that the conductive connection structure of the conductive pattern for the lithium ion secondary battery described.

In the invention of the present application, there is mainly one central bar in the battery can, and two lead-out terminals are fixed to both ends of the central bar, respectively, and a winding is wound around the peripheral surface of the central bar. A lithium ion secondary battery in which the end of the pole winding is electrically connected to the lead-out terminal by two constricting members, and the battery member and the battery can are fixed by two assembly nuts The pole winding is composed of one positive electrode sheet, one negative electrode sheet, and at least one separator, and a positive electrode material and a negative electrode material are respectively applied to the surface of the positive and negative electrode sheets, The separator is disposed between the positive and negative electrode sheets, a positive electrode connection zone where no positive electrode material is applied is provided at one end of the positive electrode sheet, and a negative electrode is provided at one end of the negative electrode sheet opposite to the positive electrode connection zone. A negative electrode connection zone where no material is applied is provided, and after the positive electrode sheet, the separator, and the negative electrode sheet are stacked in order and the center rod is wound, the positive electrode connection zone and the negative electrode connection zone are respectively connected to the electrode. The lead-out terminal extends from both ends of the winding, and the lead-out terminal has a conductive structure, one end which is a connecting end is coupled to the connecting portion of the center rod, and the other end is formed at the output end, and the lead-out terminal Is located between the connecting end and the output end, and one convex edge and one collecting zone are formed, and the collecting zone corresponds to a positively wound positive electrode connecting zone or a negative electrode connecting zone, A convex edge is in contact with the end cover of the battery can, and the binding member has one binding band, one knob, and one assembly frame, and a spiral is formed on the peripheral surface of the knob. And the wrapping van A plurality of tooth grooves are provided on the surface of the sheet, and when the knob and the band are inserted through the assembly frame, a single opening is formed, and the spiral meshes with the tooth groove, and the knob When the ring is rotated in a certain direction, the narrowing port is gradually reduced, and when the narrowing port is reduced by fitting the narrowing port of the narrowing member into the positively-connected positive electrode connection zone or the negative-electrode connection zone, The gist of the present invention is a conductive connection structure of a conductive pattern for a lithium ion secondary battery, wherein the zone or the negative electrode connection zone is in close electrical contact with the collection zone of the lead-out terminal.

According to the conductive connection structure of the conductive handle for the lithium ion secondary battery of the present invention, each conductive handle and the conductive terminal can be electrically connected without performing a welding operation, and the manufacturing process is simplified. Assembling work becomes easy, and there is an effect that the capital investment is lowered.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First, reference will be made to FIGS. The structure of the lithium ion secondary battery of the present invention mainly includes one center rod 30 in the battery can 20, and two lead-out terminals 50 are fixed to both ends of the center rod 30, respectively. A pole winding 40 is wound around the peripheral surface of the center rod 30, and ends of the pole winding 40 are electrically connected to the lead-out terminal 50 by two constricting members 60, so that the battery member and the battery can 20 are connected. It is configured to be fixed by two assembly nuts 70.

The battery can 20 has an end opening 21 at both ends, a battery member is accommodated therein, each end opening 21 is covered by two end covers 22, and the end cover 22. Has an opening 221 for inserting the battery member.

The center bar 30 is an insulating member and is assembled inside the battery can 20, and both ends thereof are respectively formed into the connecting portions 31, and the connecting portions 31 are one insertion groove.

The pole winding 40 is composed of one positive electrode sheet 41, one negative electrode sheet 42, and at least one separator 43. On the surfaces of the positive and negative electrode sheets 41, 42, a positive electrode material 411, a negative electrode material 421, and The separator 43 is disposed between the positive and negative electrode sheets 41, 42, and at least one positive electrode conductive pattern 44 is welded to one end of the positive electrode sheet 41. On the opposite side, at least one negative electrode conductive pattern 45 is welded to the negative electrode sheet 42, and the positive electrode sheet 41, the separator 43, and the negative electrode sheet 42 are stacked in order and the central rod 30 is wound around The pole winding 40 is configured, and the positive and negative electrode conductive patterns 44 and 45 are positioned at both ends of the pole winding 40, respectively.

The lead-out terminal 50 has a conductive structure, a connection end 51 is formed at one end, and the connection end 51 is an insertion rod, whereby the connection end 51 is on the center bar 30. The other end of the lead-out terminal 50 may be formed into an output end 52, and the output end 52 may be formed into a screw shaft. The lead-out terminal 50 is connected to the connecting end 51. One convex edge 53 and one collecting zone 54 are formed between the output end 52 and the collecting zone 54 corresponds to the positive and negative electrode conductive patterns 44 and 45 of the pole winding 40, and the convex An edge 53 contacts the end cover 22 of the battery can 20.

The binding member 60 has one binding band 61, one knob 62, and one assembly frame 63, and a spiral 621 is formed on the peripheral surface of the knob 62. A plurality of tooth grooves 611 are provided on the surface of each of the teeth, and when the knob 62 and the band 61 are inserted through the assembly frame 63, one band 64 is formed, and the spiral 621 is the teeth. When the knob 62 engages with the groove 611 and rotates the knob 62 in a certain direction, the narrowing port 64 is gradually reduced. When the opening 64 is reduced, the positive and negative electrode conductive patterns 44 and 45 of the pole winding 40 are in close electrical contact with the collecting zone 54 of the lead-out terminal 50.

The assembly nut 70 is an opening in which the output end 52 of the lead-out terminal 50 is opened in the end cover 22 after the pole winding 40, the center rod 30 and the lead-out terminal 50 are assembled by the constricting member 60. Each battery member and the battery can 20 are inserted into the output end 52 by inserting the assembly nut 70 into the output end 52 by inserting the assembled nut 70 into the output end 52. Will be bound stably.

According to the conductive connection structure of the conductive handle for the lithium ion secondary battery of the present invention, each conductive handle is directly electrically connected to the lead-out terminal via the tie member, and the welding operation is completely unnecessary. Since the manufacturing process is simplified and the contact area between each conductive pattern and the lead-out terminal is large, the impedance of the battery is effectively lowered, and charging and discharging can be performed with a large current.

Reference is also made to FIGS. In the middle stage of the lead-out terminal 50 of the present invention, a conductive collecting zone 54 is formed, and the collecting zone 54 corresponds to the positive and negative electrode conductive patterns 44 and 45 at both ends of the pole winding 40. When the conductive handles 44 and 45 are electrically connected to the lead-out terminal 50, the constriction port 64 of the constricting member 60 is fitted into the positive and negative electrode conductive patterns 44 and 45, and the knob 62 is rotated in a certain direction. When the spiral 621 is engaged with the tooth groove 611 in the narrow band 61 and eventually the narrow band 61 passes through the assembly frame 63 and the knob 62 is further rotated in the above direction, the narrow opening 64 is gradually reduced. As a result, the band 61, the collecting zone 54, and the positive electrode conductive pattern 44 or the negative electrode conductive pattern 45 are in intimate contact, and the positive and negative electrode conductive patterns 44 and 45 are in contact with the lead-out terminal 50. Closely electrically connected, and welding work is not at all necessary.

In particular, the electrical connection between the positive and negative electrode conductive patterns 44 and 45 and the lead-out terminal 50 is performed by tightly binding the lead-out terminal 50 and the positive electrode conductive pattern 44 or the negative electrode conductive pattern 45 by the narrow port 64 of the narrow member 60. Because it is connected, it is not necessary to weld each conductive pattern one by one, and for high capacity batteries with many conductive patterns, the connection work between the conductive pattern and the lead-out terminal is effectively simplified and assembled. The work becomes easy, the capital investment is reduced, and the positive and negative electrode conductive patterns 44 and 45 and the collecting zone 54 in the lead-out terminal 50 are in electrical contact with a large area, so that the impedance of the battery is effective. It is possible to charge and discharge with a large current.

Further, in the conventional one, one end of each positive and negative electrode conductive pattern is welded to the pole winding, but FIG. 9 and FIG. 10 show the positive electrode sheet 41a of the pole winding 40a or the edge of the negative electrode sheet at the positive electrode. A zone in which no material or negative electrode material is applied is provided, and the zone is cut into a positive electrode conductive pattern 44a or a negative electrode conductive pattern, and the integrally formed positive electrode conductive pattern 44a or negative electrode conductive pattern is bundled. Further wrapping up by the member 60a, the positive electrode conductive pattern 44a or the negative electrode conductive pattern and the collecting zone 54a of the lead-out terminal 50a are in close electrical connection, and the integrally formed positive electrode conductive pattern 44a or negative electrode Each conductive pattern of the conductive pattern may be cut as shown in FIG. 11, that is, after wrapping each conductive pattern, the gap 80 between adjacent conductive patterns is extremely small. However, according to the binding member 60b of the present invention, each positive electrode conductive pattern 44b or negative electrode conductive pattern and the collecting zone 54b of the lead-out terminal 50b are in close electrical connection. To come.

In particular, it is possible to integrate the assembly frame of the binding member 60c and the knob. As shown in FIGS. 12 and 13, a tooth portion inclined in one direction is provided in the assembly frame 63a instead of the knob. A locking part 631 having a single-piece is integrally formed, and after inserting the binding band 61a into the assembly frame 63a, the tooth groove 611a in the binding band 61a is detented to the tooth part in the locking part 631, As a result, the narrowing port 64a can only be reduced. When the narrowing port 64a is further reduced, each positive electrode conductive pattern 44c or negative electrode conductive pattern and the collecting zone 54c of the lead-out terminal 50c are closely and electrically connected. Come to join.

As is clear from the above description, according to the binding port of the binding member of the present invention, each conductive handle and the lead-out terminal are tightly and electrically connected by directly binding each conductive handle and the lead-out terminal. They can be connected, and no welding work is used in the manufacturing process, which simplifies the manufacturing process, facilitates assembly work, and reduces capital investment.

It is a perspective view which shows the composition of the conventional pole winding proposed in US Patent No. 5849431. It is the schematic which shows the structure which welded the conductive terminal to the conventional conductive handle proposed in US Patent No. 5849431. It is sectional drawing which shows the structure of another conventional lithium ion secondary battery. It is a perspective view which shows the composition of the pole winding wound around the center stick | rod of this invention. It is a perspective view which shows the state before tying up a conductive handle by one of the tying members of this invention. It is a perspective view which shows the state which tied the conductive pattern with the binding member of this invention. It is a partially expanded perspective view of the state which combined the binding member with the pole winding of this invention. It is sectional drawing which shows the state by which this invention was assembled | attached in the battery can. It is a perspective view which shows the state before tying up the electrically conductive pattern integrally molded by one of the tying members of this invention. It is a perspective view which shows the state which tied the electrically conductive pattern integrally molded by the binding member of this invention. It is a perspective view which shows the state which tied the another electrically conductive pattern formed integrally by the binding member of this invention. It is a partially expanded perspective view of the state before couple | bonding another binding member with the pole winding of this invention. It is a partially expanded perspective view of the state which combined the binding member in FIG. 12 with the pole winding of this invention.

Explanation of symbols

10, 10a Polar winding 11, 11a Positive electrode sheet 111, 111a Conductive handle 131, 131a Conductive handle 12 Separator 13, 13a Negative electrode sheet 14 Center rod 15, 15a Conductive terminal 20 Battery can 21 End opening 22 End cover 221 Opening 30 Center Rod 31 Connecting portion 40, 40a Polar winding 41, 41a Positive electrode sheet 411 Positive electrode material 42 Negative electrode sheet 421 Negative electrode material 43 Separator 44, 44a Positive electrode conductive pattern 44b, 44c Positive electrode conductive pattern 45 Negative electrode conductive pattern 50, 50a Lead-out terminal 50b, 50c Lead-out terminal 51 Connecting end 52 Output end 53 Convex edge 54, 54a Collecting zone 54c Collecting zone 60, 60a Bending member 60b, 60c Bending member 61, 61a Bending band 611, 611a Tooth groove 62 Knob 621 Spiral 63, 63a Assembly frame 631 Locking portions 64, 64 70 set nut 80 connecting gap opening lumping

Claims (4)

Mainly, one center rod is provided in the battery can, and two lead-out terminals are fixed to both ends of the center rod, respectively, and a pole winding is wound around the peripheral surface of the center rod. In the lithium ion secondary battery, in which the winding end is electrically connected to the lead-out terminal with two tie members, and the battery member and the battery can are fixed by two assembly nuts,
The pole winding is composed of one positive electrode sheet, one negative electrode sheet, and at least one separator, and a positive electrode material and a negative electrode material are applied to the surface of the positive and negative electrode sheets, respectively. Is installed between the positive and negative electrode sheets, and a positive electrode connection zone where no positive electrode material is applied is provided at one end of the positive electrode sheet, and a negative electrode material is not applied to one end of the negative electrode sheet opposite to the positive electrode connection zone A negative electrode connection zone is provided, and after the positive electrode sheet, the separator, and the negative electrode sheet are stacked in order and the center rod is wound, the positive electrode connection zone and the negative electrode connection zone are respectively connected to both ends of the pole winding. Stretched out,
The lead-out terminal has a conductive structure, one end which is a connecting end is coupled to the connecting portion of the center rod, and the other end is formed as an output end, and the lead-out terminal is connected to the connecting end and the output end. And one convex edge and one collecting zone are formed, and the collecting zone corresponds to a positively wound positive electrode connecting zone or a negative electrode connecting zone, and the protruding edge is formed on the battery can. Abut the end cover,
The binding member has one binding band and one assembly frame, and one locking portion is provided inside the assembly frame, and a plurality of tooth grooves are formed on the surface of the binding band. When the constricting member is inserted into the assembly frame, one constriction opening is formed, and the constriction opening is formed by one-way locking (reverse check) between the tooth gap and the assembly frame. When the size is reduced, the size cannot be enlarged again, and when the size of the size of the size of the size of the binding port is reduced when the size of the size of the size of the size of the size of the size of the size of the binding port is reduced. In close electrical contact with the out terminal gathering zone,
Conductive connection structure of a conductive pattern for a lithium ion secondary battery. The connecting portion of the center rod is one insertion groove, and the connecting end of the lead-out terminal is one insertion rod, and the insertion rod is inserted into the insertion groove and coupled, The conductive connection structure of the conductive handle for a lithium ion secondary battery according to claim 1. The binding frame of the binding member is provided with one binding band and one knob, a spiral is formed on the peripheral surface of the knob, and the spiral is a tooth groove in the binding band. 2. The conductive connection structure for a conductive pattern for a lithium ion secondary battery according to claim 1, wherein when the knobs are engaged and the knob is rotated in a certain direction, the binding port of the binding band is gradually reduced. Mainly, one center rod is provided in the battery can, and two lead-out terminals are fixed to both ends of the center rod, respectively, and a pole winding is wound around the peripheral surface of the center rod. In the lithium ion secondary battery, in which the winding end is electrically connected to the lead-out terminal with two tie members, and the battery member and the battery can are fixed by two assembly nuts,
The pole winding is composed of one positive electrode sheet, one negative electrode sheet, and at least one separator, and a positive electrode material and a negative electrode material are applied to the surface of the positive and negative electrode sheets, respectively. Is installed between the positive and negative electrode sheets, and a positive electrode connection zone where no positive electrode material is applied is provided at one end of the positive electrode sheet, and a negative electrode material is not applied to one end of the negative electrode sheet opposite to the positive electrode connection zone A negative electrode connection zone is provided, and after the positive electrode sheet, the separator, and the negative electrode sheet are stacked in order and the center rod is wound, the positive electrode connection zone and the negative electrode connection zone are respectively connected to both ends of the pole winding. Stretched out,
The lead-out terminal has a conductive structure, one end which is a connecting end is coupled to the connecting portion of the center rod, and the other end is formed as an output end, and the lead-out terminal is connected to the connecting end and the output end. And one convex edge and one collecting zone are formed, and the collecting zone corresponds to a positively wound positive electrode connecting zone or a negative electrode connecting zone, and the protruding edge is formed on the battery can. Abut the end cover,
The binding member has one binding band, one knob, and one assembly frame. A spiral is formed on the peripheral surface of the knob, and a tooth gap is formed on the surface of the binding band. When the knob and the band are inserted through the assembly frame, a single port is formed, and the spiral meshes with the tooth gap, and the knob rotates in a certain direction. When the narrowing port is gradually reduced, and the narrowing port is reduced by fitting the narrowing port of the constricting member into the positively wound positive electrode connection zone or the negative electrode connection zone, the polar positive electrode connection zone or the negative electrode connection zone becomes In close electrical contact with the lead-out terminal gathering zone,
Conductive connection structure of a conductive pattern for a lithium ion secondary battery.