A power supply system includes a lead battery supplying power to the electric load of the vehicle, a battery sensor unit acquiring a value related to a state of the lead battery, and a battery deterioration determination device determining deterioration of the lead battery based on the value acquired by the battery sensor unit. The battery sensor unit acquires a value of a charge amount of the lead battery, a value of a discharge amount of the lead battery, and a value of a discharge depth of the lead battery. An ECU calculates a value of an effective charge/discharge amount of the lead battery based on a charge amount acquisition value, a discharge amount acquisition value and a discharge depth acquisition value acquired by the battery sensor unit and determines deterioration resulting from softening of a positive electrode active material based on the value of the effective charge/discharge amount.

A power supply system includes a lead battery supplying power to the electric load of the vehicle, a battery sensor unit acquiring a value related to a state of the lead battery, and a battery deterioration determination device determining deterioration of the lead battery based on the value acquired by the battery sensor unit. The battery sensor unit acquires a value of a charge amount of the lead battery, a value of a discharge amount of the lead battery, and a value of a discharge depth of the lead battery. An ECU calculates a value of an effective charge/discharge amount of the lead battery based on a charge amount acquisition value, a discharge amount acquisition value and a discharge depth acquisition value acquired by the battery sensor unit and determines deterioration resulting from softening of a positive electrode active material based on the value of the effective charge/discharge amount.

Disclosed herein are a methods and system for monitoring battery temperature and providing alerts when temperatures are abnormal, comprising: wirelessly receiving temperature measurement data from a single monobloc or a plurality of monoblocs that are electrically connected in series or parallel, wherein a temperature measurement data represent the temperatures inside each of said plurality of monoblocs; calculating a temperature value, T.sub.PDAVE, equal to an average of the temperature measurement data wirelessly received from all the plurality of monoblocs in a battery; calculating a high temperature difference, T.sub.PDH, as an absolute value of the difference between the highest monobloc temperature in the battery and the T.sub.PDAVE; calculating a low temperature difference, T.sub.PDL, as an absolute value of the difference between the lowest monobloc temperature in the battery and the T.sub.PDAVE; and establishing an alert when the T.sub.PDH is greater than a predetermined high temperature threshold.

Disclosed herein are a methods and system for monitoring battery temperature and providing alerts when temperatures are abnormal, comprising: wirelessly receiving temperature measurement data from a single monobloc or a plurality of monoblocs that are electrically connected in series or parallel, wherein a temperature measurement data represent the temperatures inside each of said plurality of monoblocs; calculating a temperature value, T.sub.PDAVE, equal to an average of the temperature measurement data wirelessly received from all the plurality of monoblocs in a battery; calculating a high temperature difference, T.sub.PDH, as an absolute value of the difference between the highest monobloc temperature in the battery and the T.sub.PDAVE; calculating a low temperature difference, T.sub.PDL, as an absolute value of the difference between the lowest monobloc temperature in the battery and the T.sub.PDAVE; and establishing an alert when the T.sub.PDH is greater than a predetermined high temperature threshold.

An embodiment relates to a method for predicting a voltage dip in a vehicle electrical system before a planned start of a load in a motor vehicle. The embodiment operates to ascertain a value of supply current expected to be required after the start of the load. An electrical voltage source and an energy store connected in parallel to a voltage source via the vehicle electrical system provide the supply current for operating the load. The energy store blocks a charge current into the energy store or blocks a discharge current out of the energy store based on a vehicle electrical system voltage of the vehicle electrical system being greater than a maximum value. Based on an instantaneous value of the vehicle electrical system voltage, the embodiment further ascertains a proportion of the supply current that the voltage source generates as a source current without the energy store until the vehicle electrical system voltage has fallen to the maximum value.

An embodiment relates to a method for predicting a voltage dip in a vehicle electrical system before a planned start of a load in a motor vehicle. The embodiment operates to ascertain a value of supply current expected to be required after the start of the load. An electrical voltage source and an energy store connected in parallel to a voltage source via the vehicle electrical system provide the supply current for operating the load. The energy store blocks a charge current into the energy store or blocks a discharge current out of the energy store based on a vehicle electrical system voltage of the vehicle electrical system being greater than a maximum value. Based on an instantaneous value of the vehicle electrical system voltage, the embodiment further ascertains a proportion of the supply current that the voltage source generates as a source current without the energy store until the vehicle electrical system voltage has fallen to the maximum value.

The present disclosure is a battery capacity testing interface (BCTI) module. The BCTI module may be configured to test capacity of a battery unit, such as an individual battery or string of batteries. In one aspect of the present disclosure, the BCTI module may instruct a battery unit under test to release a controlled electrical discharge that is measured by the BCTI module. Once determined, battery capacity can provide insight into the battery life of the battery, as well as the ability of the battery to deliver a specified amount of current at a constant rate to a specified end voltage for a specified time. Advantageously, the BCTI module may operate with various types of battery monitors and may be employed to test various types of batteries, including lead-acid batteries and lithium-ion batteries.

The present disclosure is a battery capacity testing interface (BCTI) module. The BCTI module may be configured to test capacity of a battery unit, such as an individual battery or string of batteries. In one aspect of the present disclosure, the BCTI module may instruct a battery unit under test to release a controlled electrical discharge that is measured by the BCTI module. Once determined, battery capacity can provide insight into the battery life of the battery, as well as the ability of the battery to deliver a specified amount of current at a constant rate to a specified end voltage for a specified time. Advantageously, the BCTI module may operate with various types of battery monitors and may be employed to test various types of batteries, including lead-acid batteries and lithium-ion batteries.

Described herein are method and systems for detecting an unauthorized removal of a battery. The system comprising: a battery monitor circuit attached to or embedded in the battery; a remote device, wherein the remote device stores instructions that when executed on the remote device cause the remote device to perform operations comprising: receiving, at the remote device, a wireless signal from the battery monitor circuit comprising voltage and temperature data; evaluating, by the remote device, whether the battery is in its expected location by confirming for each battery, which is expected to be present, whether there has been an unexpected interruption in the wireless signal from the battery; providing an alert notification when there has been an unexpected interruption in the wireless signal.

Described herein are method and systems for detecting an unauthorized removal of a battery. The system comprising: a battery monitor circuit attached to or embedded in the battery; a remote device, wherein the remote device stores instructions that when executed on the remote device cause the remote device to perform operations comprising: receiving, at the remote device, a wireless signal from the battery monitor circuit comprising voltage and temperature data; evaluating, by the remote device, whether the battery is in its expected location by confirming for each battery, which is expected to be present, whether there has been an unexpected interruption in the wireless signal from the battery; providing an alert notification when there has been an unexpected interruption in the wireless signal.