Protection system of a vehicle battery
1 Assignment
0 Petitions
Accused Products
Abstract
A system for protecting the battery of a vehicle comprises a device (1) for electrically disconnecting of connecting the battery (BA) with respect to an electric load (CS); the device (1) comprises switch means (20, 21) and a microprocessor control circuit (15). The control circuit (15) comprises means for calculating a mean value of voltage of the battery (BA) and comparing it with a threshold value, in order to control the switch means (20, 21). The threshold value is variable as a function of the ambient temperature and the time of inactivity of the motor, and the switch means comprises a bistable electromagnetic arrangement, capable of passing from a first to a second stable condition following a pulse generated by the control circuit (15).
29 Citations
71 Claims
-
1-42. -42. (canceled)
-
43. A protection system of a battery of a vehicle, the vehicle having a motor, an ignition system (MA) of the motor, a battery (BA) used by the ignition system (MA) in order to start the motor, an alternator (AL) actuated by the motor in order to recharge the battery (BA) and at least one electric load (CS) supplied by the battery (BA), the protection system comprising a device (1) for electrically disconnecting or connecting the battery (BA) with respect to the electric load (CS), the device (1) having
switch means (20, 21, 22) connected in series between the battery (BA) and the electric load (CS) and capable of assuming a closed condition and an open condition, the switch means comprising a movable contact (21) and actuation means (20, 22) which can be actuated in order to displace the movable contact (21), a microprocessor control circuit (15), comprising means for measuring at least one electrical quantity (V_BATT, VB_AVG) being representative of a state of charge of the battery (BA), comparator means for operating a comparison between a measured value of the electrical quantity (V_BATT, VB_AVG) and a respective threshold value (VTH), control means capable of controlling the actuation means (20, 22) as a function of the comparison performed by the comparator means, characterized in that the control circuit (15) further comprises means for detecting ambient temperature (TEMP), means for detecting time of inactivity of the motor (E_OFF), means for calculating a mean value of voltage (VB_AVG) of the battery, the electrical quantity (V_BATT, VB_AVG) is the mean value of voltage of the battery (BA), the threshold value (VTH) is variable in function of the ambient temperature (TEMP) and the time of inactivity of the motor (E_OFF), the actuation means comprise a bistable electromagnetic arrangement (20, 21, 22) capable of passing from a first stable condition to a second stable condition following a pulse generated by the control means.
-
64. A device (1) for electrically connecting and/or disconnecting a battery (BA) of a vehicle with respect to an electric load (CS) of the vehicle, the device (1) having
a casing (2,3), two terminals (T1, T2) for connecting the device (1) in series between the battery (BA) and the electric load (CS), switch means (20, 21, 22) operatively interposed between the two terminals (T1, T2) and capable of assuming a closed condition and an open condition, the switch means comprising a movable contact (21) and actuation means (20, 22) which can be actuated for displacing the movable contact (21), a microprocessor control circuit (15), comprising means for measuring at least one electrical quantity (V_BATT, VB_AVG) being representative of a state of charge of the battery (BA), comparator means for performing a comparison between the measured value of the electrical quantity (V_BATT, VB_AVG) and a respective threshold value (VTH), control means capable of controlling the actuation means (20, 22) in function of the comparison operated by the comparator means, characterized in that a conductor (30) is associated to the terminal (T1) which is provided for being connected to the positive polarity of the battery (BA), the conductor (30) having at least one portion protruding outside the casing (2, 3), to realize a jump start contact, i.e., a fixing point for a clamp of an electric cable for the connection to an auxiliary starting system of the vehicle.
-
66. A device (1) for electrically connecting and/or disconnecting a battery (BA) of a vehicle with respect to an electric load (CS) of the vehicle, the device (1) having
a casing (2,3) made of at least two parts (2, 3) mutually coupled in a sealed way, two terminals (T1, T2) for connecting the device in series between the battery (BA) and the electric load (CS), switch means (20, 21, 22) operatively interposed between the two terminals (T1, T2) and capable of assuming a closed condition and an open condition, the switch means comprising a movable contact (21) and actuation means (20, 22) which can be actuated in order to displace the movable contact (21), a microprocessor control circuit (15), comprising means for measuring at least one electrical quantity (V_BATT, VB_AVG) representative of a state of charge of the battery (BA), comparator means for performing a comparison between the measured value of the electrical quantity (V_BATT, VB_AVG) and a respective threshold value (VTH), control means capable of controlling the actuation means (20, 22) in function of the comparison operated by the comparator means, characterized in that a vent device (14-14D) is associated to the casing (2, 3), operative for avoiding significant increases of pressure within the casing itself.
-
68. A device (1) for electrically connecting and/or disconnecting a battery (BA) of a vehicle with respect to an electric load (CS) of the vehicle, the device (1) having
a sealed casing (2,3), two terminals (T1, T2) for connecting the device in series between the battery (BA) and the electric load (CS), switch means (20, 21, 22) operatively interposed between the two terminals (T1, T2) and capable of assuming a closed condition and an open condition, the switch means comprising a movable contact (21) and actuation means (20, 22) which can be actuated in order to displace the movable contact (21), a microprocessor control circuit (15), comprising means for measuring at least one electrical quantity (V_BATT, VB_AVG) representative of a state of charge of the battery (BA), comparator means for performing a comparison between the measured value of the electrical quantity (V_BATT, VB_AVG) and a respective threshold value (VTH), control means capable of controlling the actuation means (20, 22) in function of the comparison operated by the comparator means, characterized in that the terminals (T1, T2) are connected to the control circuit (15) by means of respective connection elements made of conductive material (24, 25), wherein at least a part (28) of the connection elements (24, 25) that it is surrounded by material constituting the casing (2,3) has recesses and/or projections (28B) defining a labyrinth aimed at eliminating possible water and humidity infiltrations towards the inside of the casing (2, 3).
-
71. A protection system of a battery of a vehicle, the vehicle having a motor, an ignition system (MA) of the motor, a battery (BA) used by the ignition system (MA) in order to start the motor, an alternator (AL) actuated by the motor in order to recharge the battery (BA) and at least one electric load (CS) supplied by the battery (BA), the protection system comprising a device (1) for electrically disconnecting or connecting the battery (BA) with respect to the electric load (CS), the device (1) having
switch means (20, 21, 22) connected in series between the battery (BA) and the electric load (CS) and capable of assuming a closed condition and an open condition, the switch means comprising a movable contact (21) and actuation means (20, 22) which can be actuated in order to displace the movable contact (21), a microprocessor control circuit (15), comprising means for measuring at least one electrical quantity (V_BATT, VB_AVG) being representative of a state of charge of the battery (BA), comparator means for operating a comparison between the measured value of the electrical quantity (V_BATT, VB_AVG) and a respective threshold value (VTH), control means capable of controlling the actuation means (20, 22) as a function of the comparison performed by the comparator means, the control circuit (15) further comprising means for detecting a first signal being indicative of an active condition of the alternator (AL) and means for detecting a second signal being indicative of an active condition of the ignition system, wherein the control circuit (15) is operative for causing in an automatic way closure of the switch means (20, 21, 22) in case difference of voltage at ends of the movable contact (21) exceeds a predefined value for a certain number of successive detections and the first and the second signal are simultaneously present.
Specification