Abstract: A secondary aggregate battery with spatial separation of operation temperatures is provided, including: a housing, wherein a plurality of secondary battery packs and a charge balancing system connected to the secondary battery packs are disposed in the housing. The charge balancing system includes a battery state detection unit and a heat dissipation component. The housing includes a heat dissipation chamber and an accommodation chamber separated by a partition. The heat dissipation chamber accommodates the heat dissipation component, and the accommodation chamber accommodates the secondary battery packs and the battery state detection unit such that the temperature of the heat dissipation component is isolated by the independent chamber to prevent the operation temperature of the heat dissipation component affects the normal operation of the secondary battery packs.

Abstract: A secondary aggregate battery with spatial separation of operation temperatures is provided, including: a housing, wherein a plurality of secondary battery packs and a charge balancing system connected to the secondary battery packs are disposed in the housing. The charge balancing system includes a battery state detection unit and a heat dissipation component. The housing includes a heat dissipation chamber and an accommodation chamber separated by a partition. The heat dissipation chamber accommodates the heat dissipation component, and the accommodation chamber accommodates the secondary battery packs and the battery state detection unit such that the temperature of the heat dissipation component is isolated by the independent chamber to prevent the operation temperature of the heat dissipation component affects the normal operation of the secondary battery packs.

Abstract: A connecting structure for exteriorly connecting a battery cell and a load circuit by using two graphite connecting graphite blocks, wherein the positive and negative electrode terminals of the battery cell are made of nickel, the battery cell is connected to the load circuit by the two connecting graphite blocks, respectively. The graphite is inexpensive and resistant to oxidation; whereas, the connecting graphite blocks and the nickel-plated metal made electrode terminals of the battery cell will dissolve in each other to form a carbon-nickel alloy after being brought into contact with one another, thus ensuring a smooth large-current discharge because of the reduction in resistance of external connection.

Abstract: A composite lithium secondary battery, and the electrode layer assembly of the secondary battery includes: a plurality of positive electrode layers, a plurality of negative electrode layers and a plurality of separating layers disposed between the positive and negative electrode layers. The two opposite surfaces of the respective positive electrode layers are coated with the same positive electrode material which is LiFePO4 or lithium-containing ternary oxide, at least one of the positive electrode layers is coated with LiFePO4, and at least another one of the positive electrode layers is coated with lithium-containing ternary oxide, so that during the process of charge and discharge, the lithium secondary battery would have the advantages of different positive electrode materials.

Abstract: A composite lithium secondary battery, and the core assembly of the secondary battery includes: at least one positive electrode layer, at least one negative electrode layer and a plurality of separating layers which are superimposed one another and rolled up to form the core assembly. The positive electrode layer is provided with a plurality of coating sections and at least one non-coating section. The coating sections are coated with different positive electrode materials which are separated from one another by the non-coating section. At least one coating section on each of the two opposite surfaces of the positive electrode layer is coated with a different positive electrode material than other coating sections. The positive electrode materials are LFP and lithium-containing ternary oxides, so that, during the process of charge and discharge, the lithium secondary battery would have the advantages of different positive electrode materials.

Abstract: A front suspension system for an electric wheelchair includes front pivot shaft, a front wheel retainer, an elasticity resistance member, and a front shock absorber. The front shock absorber is disposed on a horizontal first section of the front wheel retainer so as to improve climbing capability of the wheelchair. The elasticity resistance member is disposed between the frame and the front wheel retainer and has two ends connected to the front wheel retainer and the abutting member of the frame, respectively. When the front wheels encounters bumpy road and makes the front wheel retainer pivot, the elasticity resistance member will be compressed to produce a reaction force toward the front wheel retainer and the abutting member of the frame, respectively, so that the front wheel retainer is pressed down to keep pressing against the flat bearing surface, and the frame is also pressed downward to prevent tipping backward.

Abstract: A front suspension system for an electric wheelchair is disposed between the frame of the electric wheelchair and each of the front wheels, and has two ends pivoted to the front pivot shaft and a corresponding one of the front wheels, respectively. An elasticity resistance member is sleeved onto the front pivot shaft and has two ends connected to the front wheel retainer and the abutting member of the frame, respectively. When the front wheels encounters bumpy road and makes the front wheel retainer pivot, the elasticity resistance member will be compressed to produce a reaction force toward the front wheel retainer and the abutting member of the frame, respectively, so that the front wheel retainer is pressed down to keep pressing against the flat bearing surface, and the frame is also pressed downward to prevent tipping backward.

Abstract: A foldable scooter frame includes: a front fork pivoted to a front frame, a front wheel assembly disposed on the front fork, the front fork being fixed to a pivot seat of a control unit, the pivot seat being pivoted to a control rod, a rear frame being connected to the front frame in a foldable manner, a rear wheel assembly disposed on the rear frame. With the pivoting arrangement of the front and rear frames, and more importantly, with the bridge rod abutted against the rear frame, the foldable scooter frame of the present invention can be maintained in a best stable state when in use, and when folded, the distance between the front and rear wheel assemblies can be reduced to the least possible amount, and the whole structure is simply structured and can be easily folded without requiring the use of complicated linkage mechanism.

Abstract: A front suspension system for an electric wheelchair is disposed between the frame of the electric wheelchair and each of the front wheels, and has two ends pivoted to the front pivot shaft and a corresponding one of the front wheels, respectively. An elasticity resistance member is sleeved onto the front pivot shaft and has two ends connected to the front wheel retainer and the abutting member of the frame, respectively. When the front wheels encounters bumpy road and makes the front wheel retainer pivot, the elasticity resistance member will be compressed to produce a reaction force toward the front wheel retainer and the abutting member of the frame, respectively, so that the front wheel retainer is pressed down to keep pressing against the flat bearing surface, and the frame is also pressed downward to prevent tipping backward.

Abstract: A front suspension system for an electric wheelchair includes front pivot shaft, a front wheel retainer, an elasticity resistance member, and a front shock absorber. The front shock absorber is disposed on a horizontal first section of the front wheel retainer so as to improve climbing capability of the wheelchair. The elasticity resistance member is disposed between the frame and the front wheel retainer and has two ends connected to the front wheel retainer and the abutting member of the frame, respectively. When the front wheels encounters bumpy road and makes the front wheel retainer pivot, the elasticity resistance member will be compressed to produce a reaction force toward the front wheel retainer and the abutting member of the frame, respectively, so that the front wheel retainer is pressed down to keep pressing against the flat bearing surface, and the frame is also pressed downward to prevent tipping backward.

Abstract: A secondary battery with an overcharge protection device includes a battery case with a chamber for holding a plurality of secondary battery cells; a heat dissipation plate fixed to the battery case; and an overcharge discharge device disposed in the battery case and including a plurality of overcharge discharge modules electrically connected to the secondary battery cells. Each overcharge discharge module includes a balance resistor fixed to the heat dissipation plate. The battery case and the heat dissipation plate are made of metal, the balance resistors are cement resistors, a plurality of first connectors are electrically connected to the overcharge discharge modules, and a plurality of second connectors are electrically connected to the cement resistors and removably fixed to a corresponding one of the first connectors.

Abstract: A battery pack with a heat dissipation structure comprises two battery modules, four heat dissipation elements, and four spacing sleeves that are combined by four screws. The four heat dissipation elements and the four spacing sleeves are disposed between the two battery modules. The dissipation elements are in direct contact with the respective battery modules, so that the heat of the respective battery module will be conducted to the heat dissipation plates then dissipated into the air through the heat dissipation fins of the heat dissipation plates. Between the two battery modules is formed a heat dissipation channel, which can avoid the heat accumulation due to direct contact of the two battery modules while allowing the hot air in the heat dissipation channel to be exchanged to the cool air outside the battery pack.

Abstract: A simply structured suspension structure for an electric wheelchair includes a frame, two drive units, two front guide units, two front shock absorbers, two anti-roll units, and two rear shock absorbers. The two front guide units are located at both sides of the frame and each include a front guide wheel, a front suspension arm and a torsion spring. The two front and rear shock absorbers are connected to the frame. The two anti-roll units are located at both sides of the frame. When the front guide arms drive the front guide wheels to pivot, the torsion springs can produce a reaction force to prevent the frame from rolling over, improving safety. When the suspension structure runs across an uneven bumpy road, the front and rear shock absorbers can ease the shock imposed on the frame, enhancing sitting comfort.

Abstract: A simply structured suspension structure for an electric wheelchair includes a frame, two drive units, two front guide units, two front shock absorbers, two anti-roll units, and two rear shock absorbers. The two front guide units are located at both sides of the frame and each include a front guide wheel, a front suspension arm and a torsion spring. The two front and rear shock absorbers are connected to the frame. The two anti-roll units are located at both sides of the frame. When the front guide arms drive the front guide wheels to pivot, the torsion springs can produce a reaction force to prevent the frame from rolling over, improving safety. When the suspension structure runs across an uneven bumpy road, the front and rear shock absorbers can ease the shock imposed on the frame, enhancing sitting comfort.

Abstract: A chassis for an electric vehicle comprises: a base frame, a front frame, a rear frame, two side frames, four suspension devices and four wheels. The front frame and the rear frame have the front arc-shaped tube and the arc-shaped rear tube fixed to the base frame, the arc-shaped tubes can not only reduce the number of tubes required but also increase the area of thrust force as compared to the straight tubes. Besides, the arc of the arc-shaped tubes avoids a connection point of an acute angle. Moreover, the height is larger than the width, which will produce less torque on the base frame as compared to that if the height is smaller than the width, thus preventing the torque acted on the base frame from damaging the connection points and improving the structural strength of the chassis at the connection points.

Abstract: A chassis for an electric vehicle comprises: a base frame, a front frame, a rear frame, two side frames, four suspension devices and four wheels. The front frame and the rear frame have the front arc-shaped tube and the arc-shaped rear tube fixed to the base frame, the arc-shaped tubes can not only reduce the number of tubes required but also increase the area of thrust force as compared to the straight tubes. Besides, the arc of the arc-shaped tubes avoids a connection point of an acute angle. Moreover, the height is larger than the width, which will produce less torque on the base frame as compared to that if the height is smaller than the width, thus preventing the torque acted on the base frame from damaging the connection points and improving the structural strength of the chassis at the connection points.

Abstract: An electrode assembly of a lithium secondary battery is specially designed such that the positive and negative layers are formed at a side thereof with a large uncoated negative lead area and a large uncoated positive lead area. In addition, the collecting area is located correspondingly to the negative lead area or the positive lead area. And then the clasping assemblies are fixed outside the positive lead area or the negative lead area. In this way, the two pressing pieces are firmly pressed against the positive lead area or the negative lead area. On the one hand, the respective layers of the positive lead area or the negative lead area are pressed closely against one another, and on the other hand, the innermost layer of the positive lead area or the negative lead area is allowed to be maintained in a tight electrical contact with the collecting area.

Abstract: A safe battery assembly structure comprises a plurality of secondary battery cells mounted on one side of a rack, and a positive guiding strip, a negative guiding strip, and a plurality of fuses mounted on the other side of the rack in such a manner that the secondary battery cells is electrically connected to the positive and negative guiding strips by the fuses and the connecting members, and each of secondary battery cells has its own fuse, so that the secondary battery cells are mounted on one side of the rack while the fuses and positive and negative guiding strips are all mounted on the other side of the rack, thus making it easy for visual checking, assembling, replacement, and maintenance of the components of the battery assembly, and also allowing a plurality of such battery assemblies to be safely arranged side by side or stacked on one another.

Abstract: A method for forming low-resistance electric connection points for a battery cell with two external nickel electrode terminals, when the graphite alloy connecting member is brought into contact with the external nickel terminals of the battery cell, graphite will be separated out of the graphite alloy connecting member, and the nickel will be separated out of the external nickel terminals of the battery cell, and then the graphite and the nickel are dissolved into each other, so that the graphite alloy connecting member and the external nickel electrode terminals of the battery cell are melted and seamlessly connected. Hence, the resistance of the battery cell is reduced to the least, while the discharge and conductivity performance of the battery cell are improved.

Abstract: A safety secondary battery pack formed by bridge connection of two secondary battery cells and two fuses is provided with two secondary battery cells and two fuses, wherein the secondary battery cells and the fuses are connected in bridge mode, each of the positive or negative terminals of the secondary battery cells is provided with a fuse. Hence, the secondary battery pack can still work properly in the case that any single battery cell fails. When any of the secondary battery cells fails and the current flowing through the fuse exceeds the rated value, the fuse electrically connected to the failed secondary battery cell will be blown to stop current from flowing, so that the failed secondary battery cell is isolated from the rest good secondary battery cells to improve safety of the battery pack.