To provide a power storage device control apparatus, a power storage device control system, and a power storage device control method that can increase the available power storage capacity (battery capacity) of a deteriorated power storage device such as a secondary battery without causing further deterioration of the power storage device. A battery control apparatus of an embodiment includes a controller. The controller lowers a lower limit voltage of discharge of a power storage device to a value in a range where a positive electrode potential of the power storage device is more than a first threshold or to a value in a range where a negative electrode potential of the power storage device is less than a second threshold, based on a deterioration state of the power storage device.

An automobile charger, a charging method and a medium are provided. The charger includes a MCU, a switching power supply circuit, a first and second charging circuits, a battery voltage detection circuit, a charging current detection circuit, a constant-current driving control circuit, a constant-voltage driving control circuit and a switch driving control circuit. The charger is provided with the first and second charging circuits, which can realize three charging modes on the battery. The real-time voltage signal and the real-time current signal are collected with the battery voltage detection circuit and the charging current detection circuit, and through feedback of the real-time voltage signal and the real-time current signal, the MCU is configured to output PWM signals with different duty ratios to the constant-current driving control circuit and the constant-voltage driving control circuit, so as to realize output of different voltage values and current values of the switching power supply.

Power management techniques are disclosed. For instance, an apparatus may include a bidirectional voltage converter circuit, and a control module that selectively operates the bidirectional voltage converter circuit in a charging mode and a delivery mode. The charging mode converts a voltage provided by an interface (e.g., a USB interface) into a charging voltage employed by an energy storage module (e.g., a rechargeable battery). Conversely, the delivery mode converts a voltage provided by the energy storage module into a voltage employed by the interface. Other embodiments are described and claimed.

An electric working machine includes an electric device, electric circuitry, battery packs to be connected sequentially to the electric device such that they are connected in parallel, and a controller. The electric circuitry includes external relays corresponding to the respective battery packs. The controller is configured or programmed to specify each battery pack as being a battery pack requiring a test process to examine opening and closing actions of internal relay(s) of the battery pack or a battery pack not requiring the test process, and in connecting the battery packs to the electric device, perform the test process on battery pack(s) that have been specified as requiring the test process to examine the opening and closing actions, and not perform the test process on battery pack(s) that have been specified as not requiring the test process to examine the opening and closing actions.

A mobile power source system with maintenance charging and a method of maintenance charging the mobile power source system are disclosed. In one aspect, the mobile power source system includes a bidirectional inverter electrically connected to the battery and configured to convert an alternating current (AC) power to direct current (DC) power in a first direction and convert DC power to AC power in a second direction. The system also includes a first switch configured to provide grid power from an electrical grid to the bidirectional inverter when switched on and stop providing the grid power to the bidirectional inverter when switched off. The system further includes a second switch configured to provide battery power from the bidirectional inverter to a load when switched on and stop providing the battery power to the load when switched off.

A battery control apparatuses may include a measuring unit for measuring a voltage of a battery, a memory for storing a multi-stage charging protocol data, and a processor for identifying a SOC of the battery based on the voltage measurement value. The processor may perform a temporary discharging procedure, when the SOC of the battery reaches the first criterion SOC while the constant current charging procedure using the first current rate is in progress. The processor may also determine an adjusted second current rate different from the second current rate based on discharging information of the temporary discharging procedure and, after the temporary discharging procedure is finished, perform a constant current charging procedure using the adjusted second current rate.

A method for periodic deep discharge to extract lithium in silicon-dominant anodes may include providing a cell comprising a cathode, a separator, and a silicon-dominant anode; charging and discharging the cell through a plurality of cycles; and, following the plurality of cycles, performing one or more deep discharge cycles, where each of the one or more deep discharge cycles comprises a cutoff voltage below a normal operating voltage range of the cell. The one or more deep discharge cycles may comprise a C/10 or lower or C/20 or lower discharge current. The one or more deep discharge cycles may include a cutoff voltage of 3.2 V or less, a cutoff voltage of 2.5 V or less, a cutoff voltage of 1.5 V or less, or a cutoff voltage of 1 V or less. The cell may be configured at a higher temperature during the one or more deep discharge cycles.

Disclosed are a charging/discharging probe, a charging/discharging jig, and a charging/discharging apparatus. The charging/discharging probe is a charging/discharging probe in contact with an electrode terminal of a secondary battery in a charging/discharging jig used for charging, discharging, or testing of the secondary battery, and may include: a jig terminal electrically connected to the electrode terminal of the secondary battery in contact with the electrode terminal; a guide rod coupled to a connection portion with a frame of the charge/discharge jig and the jig terminal and made of an elastic member; and a spring formed to surround a part of the jig terminal and the guide rod and allowing the guide rod to elastically fix the electrode terminal of the secondary battery.

Example methods to manage a plurality of battery packs of an electric vehicle include initiating a charging process for a primary battery pack and an auxiliary battery pack, determining that an Open Circuit Voltage (OCV) of the primary battery pack matches an OCV of the auxiliary battery pack, and based on determining that the OCV of the primary battery pack matches the OCV of the auxiliary battery, connecting the primary and auxiliary battery packs in parallel and initiating parallel charging of the primary battery pack and the auxiliary battery pack.

A battery management apparatus includes a measuring unit configured to measure a charge voltage, a charge current, a discharge voltage and a discharge current in the process of charging and discharging a battery according to a preset charge C-rate and a preset discharge C-rate, and a control unit configured to receive information about the voltage and current of the battery from the measuring unit, calculate a charge resistance for each voltage of the battery based on the charge voltage and the charge current, calculate a discharge resistance for each voltage of the battery based on the discharge voltage and the discharge current, calculate a resistance ratio between the charge resistance and the discharge resistance for each voltage of the battery, and set a discharge C-rate for the battery based on the resistance ratio calculated for each voltage of the battery.