摘要:
According to an embodiment of the invention, a prismatic battery includes an electrode group 10 contained in a prismatic metal outer can. The electrode group 10 has a positive electrode substrate exposed part 11 at one end and a negative electrode substrate exposed part 12 at the other end. The positive and negative electrode substrate exposed parts 11 and 12 are bundled and welded to positive and negative electrode current collectors 13 and 14, respectively. The positive electrode substrate exposed part 11 and positive electrode current collector 13 and the negative electrode substrate exposed part 12 and negative electrode current collector 14 are covered with an insulating frame 16 having an angled U-shaped cross section and an angled U-shaped outline. It is therefore possible to provide a prismatic battery of a simple structure including an electrode group whose ends are covered with an easily manufactured insulating cover in which the battery's volume energy density is maintained and an internal short circuit is prevented.
摘要:
A prismatic battery according to one embodiment of the present invention includes a flat electrode group 10 stacked or rolled by mutually positive and negative electrodes with a separator therebetween, a pressing plate 13A, a current collecting body 18A or 18B and a plurality of exposed sections 16, at least one end of the positive and negative electrodes substrates in a width direction being uncoated with a positive or negative electrode mixture. The pressing plate 13A is welded to the exposed sections 16. The pressing plate 13A includes opposing surfaces with a space therebetween provided by folding back a metal plate, and includes a slit 15 along a folded back section at least to one of the opposing surface's side. The exposed sections 16 are inserted into a gap of the pressing plate 13A, and the exposed sections 16 and the pressing plate 13A are welded by a high energy beam from a transverse direction through the slit 15. This provides a prismatic battery for large current application in electric vehicles and hybrid electric vehicles.
摘要:
A non-aqueous electrolyte secondary battery has a current interrupting mechanism with excellent impact and vibration resistance. The mechanism includes a fragile portion which breaks when the diaphragm deforms and rises upward, thereby interrupting current flow thereto; and an insulating current collecting tab holder into which a part of a current collecting tab is inserted. The tab holder has a tab receiving portion into which the insert member of the tab is inserted. The tab receiving portion is provided on the inner and outer surfaces thereof with a holder hole, which overlaps with a throughhole when the insert member is inserted. The diaphragm is disposed outside the tab receiving portion so as to cover the holder hole and electrically connected at its center bottom to the fragile portion via the holder hole. The gas pressure in the battery acts on the fragile portion and the inner side of the diaphragm.
摘要:
The method for manufacturing a sealed battery of the invention includes an ultrasonic fusion process whereby layers of a positive electrode substrate exposed portion 11 are ultrasonically fused to form a positive electrode fused portion 11a at the positive electrode substrate exposed portion 11, and layers of a negative electrode substrate exposed portion 12 are ultrasonically fused to form a negative electrode fused portion 12a at the negative electrode substrate exposed portion 12; and an electrode body formation process whereby a high-energy beam is directed at the positive electrode fused portion 11a to weld a positive electrode collector to the positive electrode fused portion 11a, and a high-energy beam is directed at the negative electrode fused portion 12a to weld a negative electrode collector to the negative electrode fused portion 12a, thus forming an electrode body in which a positive electrode collector is welded to one end of the electrode group and a negative electrode collector is welded to the other end. Thereby, the required weld strength is obtained despite a reduction in the energy for welding, and a sealed battery is obtained which has low internal resistance and in which internal short-circuiting is prevented.
摘要:
According to an embodiment of the invention, a prismatic battery includes an electrode group 10 contained in a prismatic metal outer can. The electrode group 10 has a positive electrode substrate exposed part 11 at one end and a negative electrode substrate exposed part 12 at the other end. The positive and negative electrode substrate exposed parts 11 and 12 are bundled and welded to positive and negative electrode current collectors 13 and 14, respectively. The positive electrode substrate exposed part 11 and positive electrode current collector 13 and the negative electrode substrate exposed part 12 and negative electrode current collector 14 are covered with an insulating frame 16 having an angled U-shaped cross section and an angled U-shaped outline. It is therefore possible to provide a prismatic battery of a simple structure including an electrode group whose ends are covered with an easily manufactured insulating cover in which the battery's volume energy density is maintained and an internal short circuit is prevented.
摘要:
A prismatic battery according to one embodiment of the present invention includes a flat electrode group 10 stacked or rolled by mutually positive and negative electrodes with a separator therebetween, a pressing plate 13A, a current collecting body 18A or 18B and a plurality of exposed sections 16, at least one end of the positive and negative electrodes substrates in a width direction being uncoated with a positive or negative electrode mixture. The pressing plate 13A is welded to the exposed sections 16. The pressing plate 13A includes opposing surfaces with a space therebetween provided by folding back a metal plate, and includes a slit 15 along a folded back section at least to one of the opposing surface's side. The exposed sections 16 are inserted into a gap of the pressing plate 13A, and the exposed sections 16 and the pressing plate 13A are welded by a high energy beam from a transverse direction through the slit 15. This provides a prismatic battery for large current application in electric vehicles and hybrid electric vehicles.
摘要:
A sealed battery includes an ultrasonic fusion process whereby layers of a positive electrode substrate exposed portion are ultrasonically fused to form a positive electrode fused portion at the positive electrode substrate exposed portion, and layers of a negative electrode substrate exposed portion are ultrasonically fused to form a negative electrode fused portion at the negative electrode substrate exposed portion; and an electrode body formation process whereby a high-energy beam is directed at the positive electrode fused portion to weld a positive electrode collector to the positive electrode fused portion, and a high-energy beam is directed at the negative electrode fused portion to weld a negative electrode collector to the negative electrode fused portion, thus forming an electrode body in which a positive electrode collector is welded to one end of the electrode group and a negative electrode collector is welded to the other end.
摘要:
A nonaqueous secondary battery 10 of the invention has an active material compound layer 14 deposed over at least one face of a collector 12 made of metal foil and is equipped with a positive electrode 11 having a portion 13 in a part of which metal is exposed. The positive electrode 11 together with the exposed-metal portion 13 faces a negative electrode 17 through an interposed separator 23, and on that part of the exposed-metal portion 13 that faces the negative electrode 17 through the interposed separator 23 there is formed a protective layer 16 made of a material whose electronic conductivity is lower than that of the metal and which moreover is non-insulative. With such nonaqueous secondary battery 10, should part of an electrode pierce the separator and contact with the other electrode, the battery will be gently discharged, thereby averting abnormal heat generation by the battery and additionally enabling the battery's abnormality to be sensed by the equipment via the fall in battery voltage. Thus, there is provided a nonaqueous secondary battery of excellent safety that can prevent abnormal heat generation due to a short circuit caused by burr, powder or the like piercing the separator.
摘要:
A battery including an electrode unit housed in a battery can and which generates electricity which can be taken out of the battery via a pair of negative and positive electrode terminals, wherein a terminal assembly is installed in the battery, a current collector plate is connected to an edge of an electrode of the electrode unit for connecting the electrode unit to the terminal assembly, and one or more than one connecting piece which is protrusively formed on a surface of the current collector plate is welded and secured to a base portion of the terminal assembly.
摘要:
A nonaqueous secondary battery 10 of the invention has an active material compound layer 14 deposed over at least one face of a collector 12 made of metal foil and is equipped with a positive electrode 11 having a portion 13 in a part of which metal is exposed. The positive electrode 11 together with the exposed-metal portion 13 faces a negative electrode 17 through an interposed separator 23, and on that part of the exposed-metal portion 13 that faces the negative electrode 17 through the interposed separator 23 there is formed a protective layer 16 made of a material whose electronic conductivity is lower than that of the metal and which moreover is non-insulative. With such nonaqueous secondary battery 10, should part of an electrode pierce the separator and contact with the other electrode, the battery will be gently discharged, thereby averting abnormal heat generation by the battery and additionally enabling the battery's abnormality to be sensed by the equipment via the fall in battery voltage. Thus, there is provided a nonaqueous secondary battery of excellent safety that can prevent abnormal heat generation due to a short circuit caused by burr, powder or the like piercing the separator.