Abstract: A bicycle tire comprises a toothset (5) of substantially radial generatrix (G), positioned to collaborate with a complementary toothset of a driving pinion of an electrical assistance device. The toothset (5) has teeth (51) that are equidistant by a pitch p, each tooth having a length l, in the direction of the generatrix (G), and a substantially triangular section, in a plane perpendicular to the generatrix (G), of height h. Each tooth (51) comprises an elastomeric material having an elastic shear modulus G* at least equal to a threshold elastic shear modulus G*s, G*s being such that the displacement d of the crest of each tooth is equal to 0.2 times the height h of the tooth under the action of a uniform pressure, applied by the complementary toothset to the side that forms the smallest angle, equal to 650/(l×h×(2.67?0.33×p)).

Abstract: A device for measuring voltages of N cells in a fuel cell includes plural voltage measurement modules and a communication bus connecting in series the plural measurement devices to a computer. The N cells are separated by bipolar plates. Each module can measure M voltages on a group of adjoining cells of the fuel cell, with M being a natural number, and with M?N/2. A group of cells measured by a first module is adjacent to group of cells measured by a second module. Each module includes a mechanism for fixing the module onto the fuel cell, a voltage measurement device, a connector for connecting bipolar plates of the module to the voltage measurement device, and a connector for connecting the voltage measurement device to the communication bus. A last bipolar plate connected to the first module also is connected to the second module.

Abstract: An electric power-assist device for a bicycle includes an electrical machine with a rotor, a connector structured to attach to the electrical machine, a drive pinion arranged to be driven by the rotor of the electrical machine, and a supporting structure. The drive pinion is structured to mesh tangentially with a complementary toothing integral to a tyre of a rear wheel of the bicycle. The connector is borne by the supporting structure. The connector together with the electrical machine form a sub-assembly that is manually separatable from the supporting structure.

Abstract: An electric power-assist device for a bicycle includes an electrical machine with a rotor, a connector structured to attach to the electrical machine, a battery arranged to power the electrical machine, a controller arranged to control the electrical machine, a drive pinion arranged to be driven by the rotor of the electrical machine, and a supporting structure. The drive pinion is structured to mesh tangentially with a complementary toothing integral to a tyre of a rear wheel of the bicycle. The connector is borne by the supporting structure. The supporting structure includes arms attachable to an axle of the rear wheel of the bicycle.

Abstract: Bicycle tire comprising continuous toothing (5) cooperating with complementary toothing of a drive pinion of an electric assist device. The toothing has a substantially radial generatrix (G) with respect to the rotation axis of the tire in the axial direction (YY?). Toothing (5) is positioned circumferentially on an axially outer face (31) of at least one sidewall (3) and comprises teeth (51) having height h and length l, and comprising an elastomeric material having a Shore A hardness. The height h of teeth (51) is at least equal to 0.6 mm and at most equal to 3 mm. The length l of teeth (51) is at least equal to 0.15 times and at most equal to 0.50 times the section width S of the tire. The elastomeric material of teeth (51) has a Shore A hardness of at least equal to 55 and at most equal to 85.

Abstract: Bicycle tire (1) comprising a continuous toothing (5) having a substantially radial generatrix (G) with respect to the rotation axis of the tire in the axial direction (YY?), said toothing (5) being positioned circumferentially on an axially outer face (21) of at least one sidewall (2) and comprising an elastomeric material. A retroreflective strip (6) is positioned circumferentially on the sidewall (2), axially on the outside of the axially outer face (21) of the sidewall (2) and radially on the outside of the toothing (5), a strip support (7) is interposed axially between the retroreflective strip (6) and the axially outer face (21) of the sidewall (2), and an axially outer face (71) of the strip support (7), to which the retroreflective strip (6) is applied, forms an angle (A) of at most equal to 30° with the radial direction (ZZ?) of the tire.

Abstract: A supply system of the anode circuit of a fuel cell (1) comprising: a primary fuel tank (2) intended to supply the anode circuit during an operating phase of the fuel cell, a secondary fuel tank (4) intended to supply the anode circuit when the fuel cell is shut down, the primary and secondary tanks are installed so that the secondary tank is recharged with fuel from the primary tank during an operating phase of the fuel cell, and the system further comprises a permeable membrane (6) installed between the secondary fuel tank and the anode circuit of a fuel cell. Also disclosed is a fuel cell system comprising a fuel cell and the described supply system.

Abstract: The invention concerns in particular an electrical assist device for a bicycle, said device comprising: an electric machine (2) comprising a rotor, a drive pinion (3) driven by the rotor of the electric machine, fixing means (4) for fixing the electric machine to the bicycle (1) in the vicinity of a tyre (5) of a wheel (61; 62) of said bicycle, a source (7) of electrical energy for powering the electric machine, means (8) for controlling the electric machine, characterized in that the drive pinion includes teeth (31) intended to mesh tangentially with complementary teeth (51) fastened to said tyre (5).

Abstract: The invention concerns in particular an electrical assist device for a bicycle, said device comprising: an electric machine (2) comprising a rotor, a drive pinion (3) driven by the rotor of the electric machine, fixing means (4) for fixing the electric machine to the bicycle (1) in the vicinity of a tyre (5) of a wheel (61; 62) of said bicycle, a source (7) of electrical energy for powering the electric machine, means (8) for controlling the electric machine, characterized in that the drive pinion includes teeth (31) intended to mesh tangentially with complementary teeth (51) fastened to said tyre (5), the teeth (31) of the drive pinion being helicoidal teeth.

Abstract: A bipolar plate, which forms a first polar plate of a first base element of a fuel cell and a second polar plate of a second base element adjacent to the first base element of the fuel cell, includes two parallel plates. Each plate of the parallel plates includes at least one distribution channel formed in a thickness thereof, for distributing fuel or oxidant. Each distribution channel is arranged so that, when the first and second base elements of the fuel cell are stacked together, a flow channel is formed between the two parallel plates, and the flow channel communicates with a cooling fluid supply opening.

Abstract: The invention relates to a bipolar plate forming the first polar plate of a first base element of a fuel cell and the second polar plate of a second base element adjacent to the first base element of the same fuel cell, comprising two parallel plates, each plate having at least one channel for distributing fuel or oxidant, formed in the thickness of the polar plate, the bipolar plate further comprising a manifold for the supply of fuel and/or oxidant, this manifold communicating with the interior of the bipolar plate through openings. The bipolar plate is characterized in that it comprises a cut-out formed in one of the parallel plates, so as to allow a gas located in the manifold to enter the distribution channel via the openings and the cut-out.

Abstract: Fluid distribution plate (1) for a fuel cell assembly, comprising a first plate (11) made of an electrically conductive material impermeable to all the fluids used in a fuel cell assembly, said distribution plate having a useful section (S) which is the surface over which the gases used by the electrochemical reaction are distributed, said useful section (S) being bordered all around by a peripheral section (P), said first plate having a given thickness e1 in the peripheral section and a smaller thickness e2 in the useful section so as to form a recess from the side facing the outer face and so as to have a flat inner surface, a flexible graphite foil (11C) being applied against said first plate (11) over the entire surface of the recess, the visible face of the flexible graphite foil having a distribution channel (111) for one of the fluids, said network being formed completely in the graphite foil.

Abstract: A device for measuring voltages of N cells in a fuel cell includes plural voltage measurement modules and a communication bus connecting in series the plural measurement devices to a computer. The N cells are separated by bipolar plates. Each module can measure M voltages on a group of adjoining cells of the fuel cell, with M being a natural number, and with M?N/2. A group of cells measured by a first module is adjacent to group of cells measured by a second module. Each module includes a mechanism for fixing the module onto the fuel cell, a voltage measurement device, a connector for connecting bipolar plates of the module to the voltage measurement device, and a connector for connecting the voltage measurement device to the communication bus. A last bipolar plate connected to the first module also is connected to the second module.

Abstract: A bipolar plate (1) comprising on the first face a groove forming a first distribution channel (111) for one of the gases, comprising on the second face a groove forming a second distribution channel for the other of the gases, comprising in its thickness an inner channel (122) for the circulation of a coolant, said plate being formed from a structural support having a surface that does not conduct electricity and that is chemically inert, said plate comprising pins (10) that pass through the whole thickness and that emerge on both sides through each of said first and second faces in the working section, said pins being spread over the entire working section of said plate.

Abstract: The invention relates to a device for generating electricity using a fuel cell, comprising means for producing fuel gas and oxidant gas, and at least one conditioning unit for one of the fuel and oxidant gases. The conditioning unit comprises at least one means for dehydrating the gas before its storage under pressure, at least one means for storing the gas under pressure, and at least one means for humidifying the gas after it has been taken out of storage. According to the invention, the dehydration means is configured in such a way that, in fuel cell operating mode, it operates at a temperature of at least 60° C. and at least partially humidifies the gas passing through it in fuel cell operating mode, by restoring at least some of the water extracted from the gas that passed through it in the gas production and storage mode.

Abstract: Fuel cell comprising a stack of bipolar plates (1) and polymer films (2), in which the polymer films comprise a lip (3) that overhangs on all sides relative to the adjacent bipolar plates (1).

Abstract: A fuel cell (FC) comprising a stack (A) of bipolar plates and ion exchange membranes arranged alternately, the stack (A) being clamped between two endplates (B and C), the stack (A) comprising feed and return ducts for the fluids required for the operation of the cell, said fluids comprising at least one fuel gas, the ducts communicating with a fluid management system comprising elements for controlling certain operating parameters, elements for recycling gases not consumed by the cell and elements for eliminating the water produced by the cell, said installation comprising connections for feeding gases to the cell, in which the fluid management system is at least partly integrated inside one of the endplates.

Abstract: A distribution plate for a fuel cell, comprising a first plate (11) made of electrically conductive material having an inner face and having an outer face (11o) adapted to cooperate with an ion-exchange membrane, the outer face (11o) comprising a network of distribution channels (111) for a first gas, the distribution plate having a second plate (12) made of electrically conductive material having an outer face and having an inner face (12i) adapted to be applied against the inner face of the first plate (11), a network of channels (122) for the circulation of a coolant being provided on the inner face either of the first plate (11) or (12i) of the second plate (12), or on both, the plates being joined by a uniform layer of an electrically conductive link material (2) covering the inner face of each of the first and second plates.

Abstract: A fuel cell (FC) comprising a stack (A) of bipolar plates and ion exchange membranes arranged alternately, the stack (A) being clamped between two endplates (B and C), the stack (A) comprising feed and return ducts for the fluids required for the operation of the cell, said fluids comprising at least one fuel gas, the ducts communicating with a fluid management system comprising elements for controlling certain operating parameters, elements for recycling gases not consumed by the cell and elements for eliminating the water produced by the cell, said installation comprising connections for feeding gases to the cell, in which the fluid management system is at least partly integrated inside one of the endplates.

Abstract: Fuel cell comprising a stack of bipolar plates (1) and polymer films (2), in which the polymer films comprise a lip (3) that overhangs on all sides relative to the adjacent bipolar plates (1).