摘要:
The invention relates to a system comprising an n-phase separately excited electrical machine (1), with n≧1, a controllable first energy store (2) which has n parallel energy supply branches (2a, 2b, 2c), every energy supply branch (2a, 2b, 2c) comprising a first connection (3a, 3b, 3c) that is connected to a respective phase connection (1a, 1b, 1c) of the electrical machine (1), and a second connection (4a, 4b, 4c) that is connected to a common reference bus (9), said reference bus (9) being connected to the neutral point (10) of the electrical machine (1) via a field winding (11) of the electrical machine (1).
摘要:
The invention relates to a system for charging at least one energy storing cell (5) in a controllable energy store (2) that is used to control and supply electric energy to an n-phase electric machine (1), wherein n≧1. The controllable energy store (2) has n parallel energy supply branches (3-1, 3-2, 3-3), each of which has at least two serially connected energy storing modules (4), each said energy storing module comprising at least one electric energy storing cell (5) with a corresponding controllable coupling unit (6). The energy supply branches (3-1, 3-2, 3-3) can be connected to a reference bus (T-), and each energy supply branch can be connected to a phase (U, V, W) of the electric machine (1). The coupling units (6) bridge the respective corresponding energy storing cells (5) or connect same into the respective energy supply branch (3-1, 3-2, 3-3) dependent on control signals. The aim of the invention is to allow at least one energy storing cell (5) to be charged. This is achieved in that each energy supply branch (3-1, 3-2, 3-3) can be connected to and separated from a secondary side (9-1′; 9-1″; 9-2′; 9-2″; 9-3′; 9-3″) of a charging transformer (10′; 10-1″; 10-2″; 10-3″) by a respective controllable switching element (21-1; 21-2; 21-3), an additional charging inductor (20-1; 20-2; 20-3) being arranged in each connecting line between the energy supply branches (3-1, 3-2, 3-3) and the secondary sides (9-1′; 9-1″; 9-2′; 9-2″; 9-3′; 9-3″) of the charging transformer (10′; 10-1″; 10-2″; 10-3″).
摘要:
The invention relates to a controllable energy store (2) with n parallel energy supply branches (3-1, 3-2, 3-3), where n≧1, each of which comprises at least two serially connected energy storage modules (4). Each energy storage module comprises at least one electric energy storage cell (5) having an associated controllable coupling unit (6). The coupling units (6) bridge the associated power storage cells (5) in accordance with control signals or connect the associated energy storage cells to the respective energy storage branch (3-1; 3-2; 3-3). At least one energy storage module (4-11; 4-21; 4-31) is designed such that it has reduced switching losses, reduced in particular by at least 10% compared to the other energy storage modules (4) in the respective power supply branch (3-1; 3-2; 3-3).
摘要:
The invention relates to a battery cell (101; 101; 101″; 101″′), comprising a first electrode foil (102) and a second electrode foil (103), which are rolled up together with an interposed separator to form a roll 104; 104″′), a first (105; 105″; 105″′) and a second terminal connector (106; 106″; 106″′) for connecting the battery cell (101; 101; 101″; 101′) to external circuitry, a first connecting element (107; 107; 107′), which electrically connects the first terminal connector (105; 105″; 105″′) to the first electrode foil (102), and a second connecting element (108; 108; 108″′), which electrically connects the second terminal connector (106; 106″; 106′) to the second electrode foil (103). According to the invention, the two connecting elements (105, 107; 105″, 107″; 105″′, 107″′) make contact with the respective electrode foil (102; 103) on a first end face (110; 110′) of the roll.
摘要:
The invention relates to a battery module (1), comprising at least two battery cells (2), each having a first (3) and a second connection (4), connector connecting elements (7) for connecting the battery cells (2), a first (9) and a second terminal connector (11) for connecting the battery module (1) to external circuitry, a first terminal connector connecting element (8) for connecting the first terminal connector (9) to a first terminal (5) of the battery module (1), and a second terminal connector connecting element (10) for connecting the second terminal connector (11) to a second terminal (6) of the battery module (1). The second terminal connector connecting element (10) has a planar design and is arranged in such a manner that the surface thereof runs spaced from and substantially parallel to connector connecting elements (7) and covers said elements at least in sub-regions, and that during operation a current flows through the second terminal connector connecting element (10), the direction of the current being substantially opposite the current flow direction in the connector connecting elements (7).
摘要:
A method for setting a desired output voltage of a power supply branch of a controllable energy store, for controlling and supplying electrical energy to an n-phase electric motor, where n≧1. The controllable energy store has n parallel power supply branches, which each have at least two serially connected energy storage modules including at least one electrical energy storage cell having an assigned, controllable coupling unit; are connected to a reference bus on one side; and are connected to phases, respectively, of the electric motor on the other side. At least one coupling unit is controlled by pulses so that the arithmetic mean of the output voltage of a power supply branch corresponds to the desired output voltage. The energy storage cells respectively assigned to the coupling unit are switched into the respective power supply branch for a pulse duration, and are bypassed during a pause time.
摘要:
A method for determining a point in time of a start of combustion in a cylinder of an internal combustion engine includes: providing a base compression pressure model which gives a curve of a compression pressure in the cylinder as a function of the operating point; adjusting the base compression pressure model using measured cylinder pressures of at least one operating state of the internal combustion engine at points in time at which no combustion is taking place in the cylinder, in order to obtain an adjusted compression pressure model; and determining a point in time of a start of combustion with the aid of a pressure curve determined by the adjusted compression pressure model.
摘要:
A method for determining a point in time of a start of combustion in a cylinder of an internal combustion engine includes: providing a base compression pressure model which gives a curve of a compression pressure in the cylinder as a function of the operating point; adjusting the base compression pressure model using measured cylinder pressures of at least one operating state of the internal combustion engine at points in time at which no combustion is taking place in the cylinder, in order to obtain an adjusted compression pressure model; and determining a point in time of a start of combustion with the aid of a pressure curve determined by the adjusted compression pressure model.
摘要:
The invention relates to a system (100) with a battery charging device (20) with output terminals and an vehicle electrical system power supply stage (10). The vehicle electrical system power supply stage has a step-up/step-down converter (12), which is designed to raise an input voltage of the vehicle electrical system power supply stage to an intermediate circuit voltage, a direct current intermediate circuit (13), which is coupled to the step-up/step-down converter (12) at intermediate circuit nodes (14a, 14b), and a vehicle electrical system d.c.-d.c. converter (11), which is coupled to the direct voltage intermediate circuit at the intermediate circuit nodes, and which is designed to convert the intermediate circuit voltage into a direct voltage for a vehicle electrical system (1, 2), the output terminals of the battery charging device (20) being coupled to the direct voltage intermediate circuit (13) via the intermediate circuit nodes (14a, 14b).
摘要:
A system for charging at least one energy reservoir cell in a controllable energy reservoir serving to control/supply electrical energy to an n-phase electrical machine (n≧2). The controllable energy reservoir has n parallel energy supply branches each having at least two series connected energy reservoir modules, each encompassing at least one electrical energy reservoir cell having an associated controllable coupling unit, are connected to a reference bus, and are connected to a respective phase of the machine. As a function of control signals, the coupling units interrupt the respective energy supply branch or bypass the associated reservoir cells or switch the associated reservoir cells into the respective energy supply branch. To charge at least one cell, at least two phases of the machine are connectable via at least one respective free-wheeling diode to a negative pole of a charging device. The reference bus is connectable to the negative pole of the device. Those energy supply branches connected to those phases which are connectable to the negative pole of the device each have a contact point disposed between two energy reservoir modules and is connectable via at least one free-wheeling diode to a positive pole of the device.