JP4764618B2 - Battery pack - Google Patents

Description

The present invention relates to a battery pack capable of obtaining a required output voltage by connecting a plurality of single cells without using a conventional inter-battery connection structure such as solder welding, and more specifically, a positive electrode as a conductive terminal. A metal support provided with a convex electrode that abuts and a spring-like electrode that abuts on the negative pole, or a spring-like electrode that abuts on both poles can be attached to the case body or the holder case, and a single cell can be easily inserted into the holder part. A battery pack that provides a new battery pack in which a single battery can be easily inserted into a cylindrical body or a box , and electrodes can be brought into contact with both ends of the battery to obtain a required output voltage. It is.

  A conventional battery module that obtains a predetermined voltage by collecting a plurality of NiMH batteries used in an electric bicycle or the like is shown in FIGS. In FIG. 12, a plurality of batteries 1 constitute a battery module 4 in which the positive electrodes 2 and the negative electrodes 3 of adjacent batteries 1 are alternately arranged and are closely arranged so as to form one aggregate. ing.

  On the other hand, the adjacent battery 1 is connected to the positive electrode 2 and the negative electrode 3 with the conductive bar 5 so that all the connections are electrically connected in series, and the battery 1A and the battery 1B at the end of the electrical connection are externally connected. A lead wire 6 for supplying electric power is connected.

  Here, the conductive bar 5 is made of a good conductor such as strip or round wire copper, aluminum, stainless steel, etc., and is soldered or welded to the positive electrode 2 or the negative electrode 3 of the battery 1. Electrically and mechanically connected and fixed.

  The lead wire 6 is a copper wire, aluminum wire, or the like, which is covered with a plastic insulating material or rubber, and is soldered or welded to the positive electrode 2 or the negative electrode 3 of the battery 1 in the same manner as the conductor bar 5. It is fixed electrically and mechanically.

  In FIG. 13, the plurality of batteries 1 configured as shown in FIG. 12 cover the entire outer periphery with an insulation protector 7 to provide electrical insulation from the outside and mechanical protection. The insulating protector 7 is often made of insulating paper or an organic insulating material, and a heat-shrinkable plastic tube is a kind of preferred material.

  The battery module 4 configured as described above is housed in a battery case (not shown), and forms a battery pack for an electric bicycle as a whole.

In the above conventional example, when the battery module is configured, there are the following drawbacks.
(1) When soldering or welding a battery connection, the electrode part of the battery is locally kept at a constant temperature, so that the battery undergoes thermal deterioration, the characteristics are remarkably lowered, and the life is extremely shortened.
(2) When connecting adjacent batteries, each must be fixed. If there are many connections, the work becomes complicated and a lot of work time is required.
(3) There is a risk of causing an accident that short-circuits the batteries during work, which may destroy the batteries or cause personal injury.
(4) Since it is mechanically bonded and fixed by soldering etc., it is very difficult to replace the battery when some characteristics deteriorate.
(5) Since the outer periphery is covered with insulating paper, etc., it is difficult to identify a defective battery in the event of a battery failure, and it is necessary to remove the insulating paper once and repair and replace it with insulating paper again. The work was complicated and took a lot of time.

  As a result of intensive research to solve such problems, the present inventor has been able to develop a new battery pack that can conduct electricity by simply enclosing a single cell from above and below without welding the flat connecting plate. .

That is, according to the first aspect of the present invention, conductive terminals that contact the electrodes of a plurality of unit cells are attached to both ends of the case, and the conductive terminals and the external connectors attached to the case are electrically connected via lead wires. The battery pack for guiding the output voltage obtained by incorporating the plurality of single cells in a case to the external connector, wherein the plurality of single cells have a central axis of the rechargeable single cells. The battery is characterized in that it is arranged in a plurality of rows and stages so as to be substantially parallel, and at least one of the conductive terminals in contact with the electrodes of the unit cell is a spring-like electrode . It is a pack.

In the second aspect of the present invention, conductive terminals that contact the electrodes of a plurality of unit cells are attached to both ends of the case, and the conductive terminals and the external connector attached to the case are electrically connected via lead wires. In the battery pack that connects and leads the output voltage obtained by incorporating the plurality of unit cells in a case to the external connector, the plurality of unit cells have a substantially central axis of the rechargeable unit cell. A battery pack having a structure arranged in a plurality of rows in two directions so as to be parallel to each other, wherein at least one of the conductive terminals in contact with the electrodes of the unit cell is a spring-like electrode It is.

A third aspect of the present invention is the first or second battery pack according to the present invention, wherein the conductive terminal is a metal electrode that contacts a positive electrode of a unit cell, a metal electrode that contacts a convex electrode, and a negative electrode The battery pack is characterized by having a structure in which the convex electrode and the spring electrode adjacent to each other are integrally attached to a conductive flat metal support in advance .

According to a fourth aspect of the present invention, in the first or second battery pack according to the present invention, the conductive terminal includes a metal electrode that contacts the positive electrode and the negative electrode of the unit cell, both of which are spring-like electrodes, and is adjacent to each other. The battery pack has a structure in which the spring-like electrodes to be integrally attached to a conductive flat metal support in advance.

A fifth aspect of the present invention is the battery pack according to any one of the first to fourth battery packs of the present invention, wherein the spring-like electrode has a structure in which a flat metal terminal is attached to a tip. .

According to a sixth aspect of the present invention, in the first to fifth battery packs of the present invention, the case is configured by combining an upper case and a lower case, and the plurality of single cells has a central axis. Is stored at a substantially right angle to the mating surface of the case.

According to a seventh aspect of the present invention, in the first to fifth battery packs of the present invention, the case is configured by combining an upper case and a lower case, and the plurality of single cells has a central axis. Is stored in substantially parallel to the mating surface of the case.

According to an eighth aspect of the present invention, the case includes a battery holder portion that holds the unit cell, and the battery holder unit is configured such that the unit cell is movable in a central axis direction and is free from rattling. A holder hole that is made slightly larger than the outer diameter of the unit cell and that individually accommodates each electrode side of the unit cell, and a groove that is formed so as to straddle the adjacent holder hole. The battery pack is characterized in that the conductive terminal is fitted in the groove. As such a battery pack, the case body is provided with a key switch, a fuse holder, an external connector, a remaining amount display board as required, and a handle is provided at the upper end of the upper and lower cases. Inside, a battery holder for storing and fixing the unit cell and a conductive terminal that contacts both electrodes of the unit cell are provided, and a lead wire is connected to the metal electrode located at the electrical end of the metal electrode. The battery pack can be formed by connecting a temperature fuse and wiring to an external connector through the key switch and the fuse holder.

According to a ninth aspect of the present invention, the case includes a battery holder portion that holds the unit cell, and the battery holder unit is configured such that the unit cell is movable in a central axis direction and is free from rattling. It has an insertion groove which is made slightly larger than the outer diameter of the unit cell and is formed so as to straddle the adjacent battery holder part on the end side where each electrode of the unit cell comes into contact. In the battery pack, the conductive terminal is inserted into the insertion groove.

In the eighth or ninth battery pack of the present invention , the battery holder portion of the case main body is detachable from the case main body, and the temperature fuse and the lead wire are sandwiched and fixed between the case main body and the battery holder portion. That can be a battery pack.

The battery pack according to the present invention includes a cylindrical main body containing a single cell, a lower lid that attaches and fixes an end of the main body, and an upper lid that is attached to the other end of the main body. The external cover is attached and a groove for arranging a lead wire is provided. The inner surface of the lower lid is fixed with a conductive terminal that contacts the electrode of the battery. A battery is formed by fixing a conductive terminal that comes into contact with an electrode and, if necessary, a fuse, a key part, and a remaining amount display board, and attaching the upper and lower lids and the end of the cylindrical body . Can be a pack.

The battery pack of the present invention is composed of a box body containing a unit cell and a lid for mounting and fixing the end of the body, and a battery holder is installed in the center of the cylindrical body if necessary. The battery can be arranged to the left and right, and the lid is fixed with conductive terminals that contact the battery electrodes on the inner surface of the lid, and at least an external connector, a fuse, a key part, and a remaining amount display board are provided if necessary. Thus, a battery pack in which the lid and the end of the box body are mounted can be obtained.

  According to the present invention, since there is no need to manually solder or weld the metal support as in the prior art, all the conventional problems are solved, there is no thermal damage during assembly, and the assembly is easy. It is possible to provide a long-life, high-quality, high-reliability battery pack that can be easily replaced.

  In addition, the battery pack of the present invention has a carrying handle attached to the case body for easy carrying, and an external connector is attached to the outside of the case so that the charging operation can be performed easily. Therefore, it is a battery pack that can be easily charged by users such as women and children.

  The battery pack of the present invention is a tool that can be easily used not only as a battery pack for a conventional electric bicycle, but also as an electric motorcycle, a power source for camping, an electric reel for fishing, or the like.

  Embodiments of the present invention will be described below with reference to the drawings, but the scope of the present invention is not limited to these drawings.

  1 and 2 show the external shape of the battery pack 100 according to the first embodiment of the present invention. Of these, FIG. 1 is a front view, and FIG. 2 is a side view.

  In FIG. 1 and FIG. 2, the upper case 101 and the lower case 102, which are case bodies, are assembled together by incorporating a battery (not shown) therein, and are integrally fixed by screws 103. A key switch 104 and a fuse holder 105 are attached to the upper case 101, and an external connector 106 is attached across the upper case 101 and the lower case 102. Note that a handle 107 is provided on the upper side of the battery pack 100 as necessary, so that the battery pack 100 can be easily carried.

  FIG. 3 shows a front view with the lower case 101 of the battery pack 100 removed, and FIG. 4 shows a cross-sectional view taken along line AA shown in FIGS.

  3 and 4, the upper case 101 and the lower case 102 are provided with a plurality of holder holes 111 and 112 into which the battery 108 is inserted and held, respectively, integrally with the upper case 101 and the lower case 102. On the upper and lower bottom surfaces 113, 114 of the holder holes 111, 112, a metal electrode 115 that is a conductive terminal that comes into contact with the positive electrode 109 of the battery 108 and a spring-like electrode 116 that is a conductive terminal that comes into contact with the negative electrode 110. Although not shown, the electrode support 117 is integrated with the electrode support 117 and fixed at a predetermined place.

Here, when the holder holes 111 and 112 are configured as a battery pack as shown in FIG. 4 , the battery 108 can move in the direction of the central axis and is slightly larger than the outer diameter of the battery 108 so that there is no backlash. It is made.

  On the other hand, in the present embodiment, the plurality of batteries 108 include a metal electrode 115, a spring-like electrode 116, and holder holes 111, 112 which are convex electrodes integrated with the electrode support 117 so as to be all connected in series. The negative pole (not shown) of the battery 108A located at the final electrical end has a lead wire 118, a key switch 119, a lead wire connected to a spring-like electrode (not shown). 120, the fuse holder 121, and the lead wire 122 are led to the external connector 123, and the positive electrode (not shown) of the battery 108B at the other electrical end is connected to the metal electrode (not shown). The lead is led to the external connector 123 via the lead wire 124.

  Next, the metal electrode 115 and the spring-like electrode 116 integrated with the electrode support 117 will be described. FIG. 5 shows a perspective view attached to the electrode support 117, and FIG. 6 shows the holder holes 111 and 112. The top view of the state inserted in is shown.

  5 and 6, a metal electrode 115 and a spring-like electrode 116 are attached to an electrode support 117 made of a flat conductive metal. The metal electrode 115 is a part of the electrode support 117 here. The parts are integrally formed by extruding with a mold, but of course, they may be attached by welding or soldering as another member of conductive metal.

  On the other hand, the spring-like electrode 116 is made by winding a conductive metal wire such as a phosphor bronze wire for spring and a beryllium wire for spring in a coil shape, and is electrically connected to the electrode support 117 by screwing or riveting. Mechanically fixed while touching. Note that the structure, manufacturing method, and mounting direction of the metal electrode 115 and the spring-like electrode 116 described here are just examples, and are not limited as long as the functions and configurations are satisfied.

  The electrode unit 125 thus configured is fitted into the groove 126 communicating with the adjacent holder holes 111A and 111B (in the case of the lower case, the holder holes 112A and 112B) and is attached to the upper case 101 with screws 127. It is fixed. Note that the bottom surface (not shown) of the groove 126 is substantially flush with or slightly higher than the bottom surface 113 of the holder hole 111.

  Next, another embodiment of the present invention will be described.

  7, 8, and 9 are views showing another embodiment of the present invention. FIG. 7 is a front view of the battery pack 200 with the lower case 202 removed, and FIG. 8 shows the lower case 202. FIG. 9 shows a cross-sectional view taken along the line B-B of FIG. 7 in the attached state, and FIG. 9 shows a cross-sectional view taken along the line CC of FIG. 7 with the lower case 202 attached. In this case, the basic functions and configurations of FIGS. 7 to 9 are the same as FIGS. 1 to 4 of the first embodiment, and the battery 208 is placed at right angles to the fitting direction of the upper case and the lower case. .

  7 to 9, the upper case 201 and the lower case 202 are provided with a plurality of arc-shaped holder grooves 211 and 212 into which the battery 208 is inserted and held, respectively, integrally with the upper case 201 and the lower case 202. In the holder grooves 211 and 212, two batteries 208 are placed in series. In addition, a metal electrode 215 that abuts the positive electrode 209 at one end of the battery 208 placed in series, and a spring-like electrode 216 that abuts the negative electrode 210 at the opposite end are integrated with the electrode support 217. And fixed in place.

  Here, the arc diameter of the holder grooves 211 and 212 is slightly smaller than the outer diameter of the battery 208 so that the battery 208 can move in the direction of the central axis when the battery pack 200 is configured. It is made large.

  On the other hand, in this embodiment, the plurality of batteries 208 have a configuration in which the metal electrode 215 and the spring-like electrode 216 integrated with the electrode support 217 are arranged so as to be all connected in series. The positive electrode 209A of the battery 208A located at the end is led to the external connector 223 via the lead wire 218, the key switch 219, the lead wire 220, the fuse holder 221, and the lead wire 222 connected to the metal electrode 215, and the other The negative electrode 210B of the battery 208B at the final electrical end is led to the external connector 123 via a lead wire 224 connected to the spring-like electrode 216.

  After being configured in this manner, the upper case 201 and the lower case 202 are fitted together and fixed together with screws 203 to form the battery pack 200. It should be noted that the previous example and this example differ in the number of batteries 208, but are not particularly intended and not limited.

  Next, the metal electrode 215 and the spring-like electrode 216 integrated with the electrode support 217 will be described. 10 is a perspective view of the electrode unit, and FIG. 11 is a partial side view of the electrode unit inserted and fixed in the upper case.

  10 and 11, a metal electrode 215 and a spring-like electrode 216 are attached to an electrode support 217 made of a plate-like conductive metal having a substantially U-shape, and the metal electrode 215 is Here, a part of the electrode support 217 is integrally formed by extruding with a mold, but of course, it may be attached by welding or soldering as another member of the conductive metal.

  On the other hand, the spring-like electrode 216 is made by winding a conductive metal wire such as a phosphor bronze wire for spring or a beryllium wire for spring in a coil shape, and is electrically connected to the electrode support 217 by screwing or riveting. Mechanically fixed while touching. Note that the structure, manufacturing method, and mounting direction of the metal electrode 215 and the spring-like electrode 216 described here are just examples, and are not limited as long as the functions and configurations are satisfied.

  Thus, the electrode unit 225 configured in this way has the side walls 201A, 201B of the upper case 201 so that the metal electrode 215 and the spring-like electrode 216 are in contact with the positive electrode 209 and the negative electrode 210 of the adjacent battery 208, respectively. In addition, it is inserted and fixed in an insertion groove 230 provided in the side walls 202A and 202B of the lower case 202.

  As an improved version of the first embodiment, a case in which a holder is attached to the upper and lower cases to cope with vibrations when using the battery is shown in FIGS. 14 and 15. In this case, the inner bottom surfaces of the upper case 101 and the lower case 102 A plurality of holders 311 and 312 in which the battery 108 is inserted and held are provided integrally or detachably.

  The electrode units 315 shown in FIG. 16 are arranged at predetermined positions on the inner bottom surface portions 313 and 314 of the upper and lower cases so that the holders 311 and 312 are in contact with the positive electrode 109 and the negative electrode 110 of the battery 108.

  This electrode unit 315 has a structure in which a flat metal terminal 318 having a diameter of 6 mm and a thickness of 1 mm, for example, is fixed to the tip by welding or soldering on an electrode indicating plate 316 via a spring-like electrode 317. The flat metal terminal 318 is in direct contact with the positive electrode 109 and the negative electrode 110 of the battery 108, so that a large installation area can be taken, so that a large current can be applied. Yes.

  When the holders 311 and 312 are used in a battery pack as shown in FIG. 3, the battery 108 is movable in the direction of the central axis and laterally as shown in FIGS. It is attached so as to be slightly wider than the outer diameter of the battery so as not to rattle.

In this embodiment, in order to connect all the batteries 108 in series, an electrode unit 315 is arranged between the holders 311 and 312 as shown in FIG. 16, and the lower case shown in FIG. In the front view showing the state in which the battery is removed, the minus plate (not shown) of the battery 108A located at the final electrical end is a lead wire 118 key switch 119 connected to the spring electrode and the flat metal terminal. The positive electrode (not shown) of the battery 108B at the other end of the electrical lead is led to the external connector 123 via the lead wire 120, the fuse holder 121, and the lead wire 122, and a spring-like electrode (not shown). The lead wire 401 is connected to the external connector 123 through the thermal fuse 400 and the lead wire 124 .

  The electrode unit 315 having the above structure is fitted between the adjacent holders 311 and 312 and fixed to the upper case 101 or the battery holder 400 shown in FIG. 23 with screws 319. In this case, the holders 311 and 312 are fixed. Is set lower than the unit cell 108.

  FIGS. 18 to 20 are diagrams for explaining another embodiment. FIG. 18 is a front view of the battery pack 200 with the lower case 202 removed, and FIG. 19 shows the lower case 202 attached. 18 shows a section BB of FIG. 18 in a state, and FIG. 20 shows a section CC of FIG. 18 with the lower case 202 attached. In this case, the basic functions and configurations of FIGS. 18 to 20 are the same as those of FIGS. 1 to 4 of the first embodiment, and the battery 208 is placed at right angles to the fitting direction of the upper case and the lower case. .

  18 to 20, the upper case 201 and the lower case 202 are provided with a plurality of arc-shaped holder grooves 211 and 212 into which the battery 208 is inserted and held, respectively, integrally with the upper case 201 and the lower case 202. In the holder grooves 211 and 212, two batteries 208 are placed in series. In addition, a flat metal terminal 318 that contacts the positive electrode 209 at one end of the battery 208 placed in series, and a flat metal terminal 318 that contacts the negative electrode 210 at the opposite end of the battery 208 are spring-shaped electrodes 317. The electrode indicating plate 316 is integrated and fixed at a predetermined place.

  Here, the arc diameters of the holder grooves 211 and 212 are, when configured as the battery pack 200, the diameter outer dimensions of the battery 208 so that the battery 208 can move in the central axis direction and there is no backlash in the lateral direction. Made slightly larger.

  On the other hand, in this embodiment, the plurality of batteries 208 have a configuration in which a flat metal terminal 416 integrated with the electrode support 417 and a spring-like electrode 415 are arranged as a battery unit 425 so as to be all connected in series. The positive electrode 209A of the battery 208A located at the final electrical end is connected to the external connector via the lead wire 218, key switch 219, lead wire 220, fuse holder 221, and lead wire 222 connected to the electrode support 417. The negative electrode 210B of the battery 208B at the other end of the electrical lead is led to the external connector 123 via the lead wire 224 connected to the electrode support 417.

  After being configured in this manner, the upper case 201 and the lower case 202 are fitted together and fixed together with screws 203 to form the battery pack 200. It should be noted that the third embodiment is different from the present embodiment in the number of batteries 208, but is not specifically intended or limited.

  Next, the flat metal terminal 416 and the spring electrode 415 integrated with the electrode support 417 will be described. 21 is a perspective view of the electrode unit, and FIG. 22 is a partial side view of the electrode unit inserted and fixed in the upper case.

  21 and 22, a plate-like metal terminal 416 and a spring-like electrode 415 are attached to an electrode support 417 made of a plate-like conductive metal having a substantially U-shape. The terminal 416 is attached to the spring-like electrode 415 by welding or soldering.

  On the other hand, the spring-like electrode 416 is made by winding a conductive metal wire such as a phosphor bronze wire for spring and a beryllium wire for spring in a coil shape, and is electrically connected to the electrode support 417 by screwing or riveting. Mechanically fixed while touching. In addition, the structure, manufacturing method, and mounting direction of the metal electrode 415, the spring-like electrode 416, and the plate-like metal terminal 416 described here are just examples, and are not limited as long as the functions and configurations are satisfied. Absent.

  The electrode unit 425 thus configured includes the side walls 201A and 201B of the upper case 201 and the lower case so that the flat metal terminals 416 are in contact with the positive electrode 209 and the negative electrode 210 of the adjacent battery 208, respectively. It is inserted and fixed in an insertion groove 230 provided on the side walls 202A and 202B of 202.

  In the third and fourth embodiments, the thermal fuse 400 is attached at an arbitrary position between the batteries in order to prevent the battery from being heated. In this case, the thermal fuse may be of a type that is disconnected by commercially available heat. However, a thing which can be restored when the switch is turned off at a certain fixed temperature and the temperature is lowered is still more preferable.

  FIG. 23 and FIG. 24 show an embodiment showing another form in which the holders 301 and 302 are attached to the holder unit 402. Holders 301 and 302 and a battery unit 315 are fixed to the holder unit 402 so as to sandwich the battery.

  The four corners of the holder unit 402 are provided with a fixing hole 420 for attachment to the case, and a thermal fuse hole 422 for passing a thermal fuse lead wire at an arbitrary position.

  As shown in FIG. 24, such a holder unit 402 is attached to the upper case 101 to sandwich the battery. In this case, the lead wire connected to the thermal fuse 400 has a thermal fuse hole 422 provided in the holder unit 402. Although it is inserted and connected to an electrode support (not shown) and an external connector (not shown) in the groove 423, the thermal fuse 400 itself has a thermal conductivity such as aluminum tape as shown in FIG. It is directly attached to the side of the battery 108 with an excellent tape (not shown).

  FIG. 25 is a perspective view showing a flashlight type battery pack. This battery pack is composed of a cylindrical body 500 containing a unit cell, a lower lid 501 for attaching and fixing the end of the main body, and an upper lid 502 with a handle 503 attached to the other end of the body. Yes.

  26 is a perspective view showing a holder case 512 that is inserted into the flashlight-type battery pack shown in FIG. The holder case 512 is a hollow body that is open at the other end and holds a plurality of single cells inserted therein. A lead terminal 514 is provided at the end and is wired to the external connector 504 through the groove 506. The lead wire 507 is connected.

  FIG. 27 is a cross-sectional view showing the AA ′ cross section of FIG. 25. The cylindrical body 500 is provided with an external connector 504 and a holder case 512 provided with a groove 505 in which the lead wire 507 is disposed. A spring electrode 508, which is a metal electrode in contact with the battery electrode, is fixed to the inner surface of the holder case 512, and the upper cover 502 on the other side is a metal electrode in contact with the battery electrode on the inner surface of the cover body. A certain spring electrode 509 is fixed, and a fuse 510, a key portion 511, and a remaining amount display board (not shown) are provided therein, and the upper and lower lids and the end of the cylindrical body are fixed with screws. It is installed by doing.

  In FIG. 27, a groove for guiding the lead wire 507 connected to the external connector 504 is set on the outer surface of the cylindrical body 500. On the contrary, this groove is provided on the inner surface of the cylindrical body 500 to connect the lead wire 507 to the spring. The electrode 508 and the external connector 504 may be connected.

  On the other hand, the fuse 510 and the key portion 511 attached to the upper lid 502 have ends on the outer surface side, and lead wires are disposed on the opposite side to connect to the external connector 504 and the spring-like electrode 509. Yes.

  FIG. 28 is a perspective view showing a box-shaped battery pack. This battery pack is composed of a box body 600 containing a unit cell and a lid 601 with a handle to which the end of the body is attached. The lid 601 includes an external connector 602, a fuse 603, and a key portion. 604 is installed facing the front side.

  The box body 600 is a hollow body that is open at the other end and holds a plurality of single cells inserted therein. A lead terminal (not shown) is provided at the end inside the body. A lead wire (not shown) wired to the external connector 602 is connected to the inner surface of the main body through a groove (not shown).

  As another form, a holder case 605 inserted into the box body 600 as shown in FIG. 29 may be used. The holder case 605 is provided so as to be positioned inside the box body 600 of FIG. 27, and a structure in which a single battery (not shown) is inserted into the left and right cylindrical portions 606 of the holder case to hold the single battery. It has become.

  The holder case 605 is provided with a groove 608 in which a lead wire 607 connected to the external connector 602 is disposed. The lead wire 607 is connected to the lead terminal 609 at the center of the end of the holder case 605, and further the lead terminal 607 is configured to contact a metal electrode (not shown) in contact with the tip electrode of the left and right unit cells.

  The external connector 602, the fuse 603, the key portion 604, and the remaining amount display board (not shown) provided in the box body 600 are connected by lead wires as shown in FIG. 27 of the sixth embodiment. In addition, a metal electrode (not shown) that is in contact with the tip electrode of the unit cell is attached to the end of the lid, as described above.

It is a front view of the battery pack of the present invention. It is a side view in FIG. It is a front view which shows the state which removed the lower case in Example 1. FIG. It is sectional drawing which shows the cross section of AA in FIG.1 and FIG.3. It is a perspective view which shows the metal support body which attached the metal electrode and the spring-like electrode. It is a top view which shows the state which inserted the metal support body in the holder hole. It is a front view which shows the state which removed the lower case in Example 2. FIG. It is BB sectional drawing which shows the state which attached the lower case in FIG. It is CC sectional drawing which shows the state which attached the lower case in FIG. 6 is a perspective view showing an electrode unit in Example 2. FIG. It is a partial side view which shows the state which attached FIG. 10 to the upper case. It is a perspective view which shows the structure of the conventional battery module. It is sectional drawing which shows the state which covered FIG. 12 with the electrical insulator. It is a front view which shows the state which removed the lower case in Example 3. It is sectional drawing which shows the cross section of AA in FIG. It is a perspective view which shows the metal support body which attached the spring-like electrode. It is a top view which shows the state which inserted the metal support body between the holders. It is a front view which shows the state which removed the lower case in Example 4. It is BB sectional drawing which shows the state which attached the lower case in FIG. It is CC sectional drawing which shows the state which attached the lower case in FIG. 6 is a perspective view showing an electrode unit in Example 3. FIG. It is a partial side view which shows the state which attached FIG. 21 to the upper case. 10 is a plan view of the upper surface of a holder unit in Embodiment 3. FIG. It is sectional drawing which shows the A-A 'cross section of the state which attached the holder unit. FIG. 10 is a perspective view showing the entire battery unit of Example 6. It is a perspective view of the holder case used in Example 6. FIG. It is sectional drawing which shows the A-A 'cross section of FIG. FIG. 10 is a perspective view showing the entire battery unit of Example 7. It is a perspective view of the holder case used in Example 6. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Battery pack 101 ... Upper case 102 ... Lower case 103 ... Screw 104 ... Key switch 105 ... Fuse holder 106 ... External connector 107 ... Handle 108 ... Battery 109 ... Positive electrode 110 ... Negative electrode 111 ... Holder hole 112 ... Holder hole 113 ... Holder hole bottom surface 114 ... Holder hole bottom surface 115 ... Metal electrode 116 ... Spring Electrode 117 ... Electrode support 119 ... Key switch 120 ... Lead wire 121 ... Fuse holder 122 ... Lead wire 123 ... External connector 124 ... Lead wire 125 ... Electrode Unit 126 ... groove 200 ... battery pack 201 ... upper case 202 ... lower case 208 ... battery 209 ... positive electrode 210 ··· Negative electrode 211 ··· Holder groove 212 ··· Holder groove 215 ··· Metal electrode 216 · · · Spring-like electrode 217 · Metal support 218 · · · Lead wire 219 · · · Key switch 220 .... Lead wire 221 ... Fuse holder 222 ... Lead wire 223 ... External connector 230 ... Insertion groove 301 ... Upper case 302 ... Lower case 311 ... Holder 312 ... Holder 313: Upper case bottom surface portion 314 ... Lower case bottom surface portion 315 ... Electrode unit 316 ... Electrode indicating plate 317 ... Spring electrode 318 ... Flat metal terminal 319 ... Screw 320 ... groove 400 ... temperature fuse 401 ... lead wire 402 ... holder case 403 ... groove 415 ... electrode unit 416 ... electrode indicator plate 4 7 ... Spring electrode 418 ... Flat metal terminal 419 ... Screw 420 ... Fixing hole 421 ... Screw hole 422 ... Thermal fuse hole 423 ... Groove 500 ... Tube Body body 501 ... Lower lid body 502 ... Upper lid body 503 ... Handle 504 ... External connector 505 ... Groove 506 ... Screw 507 ... Lead wire 508 ... Spring electrode 509 ... Spring electrode 510 ... Fuse 511 ... Key 512 ... Holder case 513 ... Recess 514 ... Lead terminal 600 ... Box body 601 ... Lid 602 ... External Connector 603 ... Key 604 ... Fuse 605 ... Holder case 606 ... Cylindrical part 607 ... Lead wire 608 ... Groove 609 ... Lead terminal

DESCRIPTION OF SYMBOLS 1 ... Battery 2 ... Positive pole 3 ... Negative pole 4 ... Battery module 5 ... Conductive bar 6 ... Lead wire

Claims (9)

A conductive terminal that contacts the electrodes of a plurality of unit cells is attached to both ends of the case, the conductive terminal and an external connector attached to the case are electrically connected via a lead wire, In the battery pack for guiding the output voltage obtained by incorporating the single cell in the case to the external connector,
The plurality of unit cells are structured in a plurality of rows and a plurality of stages so that the central axes of the rechargeable cells are substantially parallel.
The battery pack according to claim 1, wherein at least one of the conductive terminals in contact with the electrode of the unit cell is a spring electrode . A conductive terminal that contacts the electrodes of a plurality of unit cells is attached to both ends of the case, the conductive terminal and an external connector attached to the case are electrically connected via a lead wire, In the battery pack for guiding the output voltage obtained by incorporating the single cell in the case to the external connector,
The plurality of cells are arranged in a plurality of rows in two directions so that the central axes of the rechargeable cells are substantially parallel,
The battery pack according to claim 1, wherein at least one of the conductive terminals in contact with the electrode of the unit cell is a spring electrode. In the conductive terminal, the metal electrode that contacts the positive electrode of the unit cell is a convex electrode, the metal electrode that contacts the negative electrode is a spring-like electrode, and the adjacent convex electrode and the spring-like electrode are preliminarily conductive plates. battery pack according to claim 1 or 2, characterized in that the Jo metal support is a structure attached integrally. In the conductive terminal, the metal electrodes that contact the positive electrode and the negative electrode of the unit cell are both spring-like electrodes, and the adjacent spring-like electrodes are integrally attached to a conductive flat metal support in advance. The battery pack according to claim 1, wherein the battery pack has a structure. The battery pack according to any one of claims 1 to 4, wherein the spring-like electrode has a structure in which a flat metal terminal is attached to a tip. The case is configured by combining an upper case and a lower case,
The battery pack according to any one of claims 1 to 5, wherein the plurality of single cells are accommodated so that a central axis thereof is substantially perpendicular to a mating surface of the case. The case is configured by combining an upper case and a lower case,
The battery pack according to any one of claims 1 to 5, wherein the plurality of single cells are accommodated with a central axis thereof substantially parallel to a mating surface of the case. The case includes a battery holder for holding the unit cell,
The battery holder portion is made slightly larger than the outer diameter of the unit cell so that the unit cell can move in the direction of the central axis and is not loose, and each cell side of the unit cell. A holder hole that individually accommodates the groove, and a groove formed so as to cross over the adjacent holder hole,
The conductive terminal is fitted in the groove,
The battery pack according to claim 6, wherein the battery pack is a battery pack. The case includes a battery holder for holding the unit cell,
The battery holder portion is made slightly larger than the outer diameter of the unit cell so that the unit cell can move in the direction of the central axis thereof and does not rattle, and each electrode of the unit cell is It has an insertion groove formed so as to straddle the adjacent battery holder part on the end side to be abutted,
The conductive terminal is inserted in the insertion groove,
The battery pack according to claim 6, wherein the battery pack is a battery pack.

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