Nitro Nobel Ab

Ctek Sweden Ab

Bengt Wahlqvist

Lars-Gunnar Lofgren

Börje Maleus

Tord Olsson

Allen Salaker

Vidon Lindquist

A battery charging system () and method for state controlled charging of a battery (). The battery charging system comprises two parallel paths () for supplying charging current to the battery () from two parallel sources of charging current, an energy source () and a controlled charging device (). A control unit () is adapted to control the supply of charging current along the two paths in response to a detected state of the battery (). If a state above a predetermined threshold is detected, the control unit () controls the supply of charging current such that the battery () receives charging current from the controlled charging device (), but not directly from the energy source (). The detected state of the battery may e.g. be a temperature state. The present invention allows for balancing the demands of high charging rate and long expected lifetime of the battery ().

Battery charging system for controlling the supply of charging current depending on battery temperature, a battery operated system and a method for state controlled charging

A block for enclosing, holding or connecting in a signalling pyrotecnical network exploding pyrotecnic ignition devices, such as cords or detonators. The block comprises, in sequence from a centrally arranged ignition device (9), an inner wall (2) substantially surrounding at least an axial part of the ignition device, an empty space (7), or a material of lower density than in the inner wall, substantially surrounding the inner wall, an outer wall (1) substantially surrounding the inner wall and the space and fixation means (6, 8, 12) for keeping the ignition device, the walls and space in said positions. The block may have an annular inner space (65) or channel spaces between the ignition device and the inner wall and fixation means (35,66,69) for keeping the ignition device, the walls and space in the stated positions, whereby the inner wall is axially slitted (33,64).

Connecting block for ignition devices

Growing community of inventors

Vikmanshyttan, Sweden

Bengt Wahlqvist