A state estimator estimates, based on at least one of a voltage, a current, and a temperature of a secondary battery, a state of the secondary battery including a state of charge (SOC) of the secondary battery. A discharge controller discharges, when a state of non-use of the secondary battery lasts for a predetermined period of time, the secondary battery such that an indicator indicating easiness of storage deterioration of the secondary battery to progress decreases in stages. The indicator includes a parameter that depends on an SOC of the secondary battery. A value of the indicator and a duration of stay in each stage are set such that a predetermined relationship holds between products in a plurality of stages, each of the products being derived from multiplying the value of the indicator and the duration of stay in each stage.

The present invention relates to a method for reconditioning of a battery module (1). The battery module (1) comprises two or more battery cells (2), and has a casing (4) encompassing the battery cells and enclosing a common gas space (5). The method comprises the steps of: obtaining data relating to the number of cells of the battery module and voltage over the battery cells; obtaining (102) an indicative parameter related to an internal resistance (Ri) of at least one of the battery cells; determining (104) based on the indicative parameter and the data on the battery module, determining (105a) whether the voltage indication over the at least one of the battery cells is range of voltage indication threshold (Ut0-Ut1), a filling amount of oxygen to be filled into the battery module; and filling (107) the amount of oxygen into the battery module in order to reduce the indicative parameter to a level below the first threshold value.

Disclosed is a zero-voltage discharge circuit device, in particular, a zero-voltage discharge circuit device configured to discharge a secondary battery while relevant switching elements are kept continuously turned on without being repeatedly turned on and off in a discharge mode of the second battery, so that the discharge circuit can be configured with low withstand voltage switching elements, and is configured to generate a charging current and a discharging current by just selectively turning on the switching elements without changing an operating voltage, thereby reducing power loss in charging and discharging, and simplifying a control operation for the charging and the discharging.

A control device that controls charging/discharging of a secondary battery mounted on a vehicle includes: a detection unit configured to detect start of deriving of a deterioration state of the secondary battery; and a control unit configured to control charging/discharging of the secondary battery such that a charging rate of the secondary battery is equal to or higher than a first predetermined value and equal to or lower than a second predetermined value in a state in which the vehicle is parked and is connected to an external power supply in a case in which start of deriving of the deterioration state has been detected by the detection unit.

A chassis structure of an apparatus contains a battery. Charger circuitry is operable to provide charge to the battery. Discharge circuitry is operable to receive charge from the battery. Switch circuitry is coupled between the battery and each of the charger circuitry, the discharge circuitry, and a load. A connector at an exterior surface of the chassis couples the apparatus to a power supply. The switch circuitry is coupled to the connector via the charger circuitry. A first control activable at the exterior surface of the chassis structure is operable to generate, in response to being activated, a first control signal to request a first switch state wherein the battery is electrically coupled to the discharge circuitry. A controller circuit coupled to receive the first control signal from the first control and, based on the first control signal, to operate the switch circuitry to provide the first switch state.

An automated vehicle battery preconditioning system and method that receive battery state-of-charge and battery preconditioning time information from a vehicle battery management system of each of a plurality of vehicles and battery charging time and charging power information from a battery charger management system and, based on the information, generate a battery charging schedule and a battery preconditioning schedule for the plurality of vehicles; direct the battery charger management system to charge a battery of each of the plurality of vehicles according to the battery charging schedule; and direct the vehicle battery management system of each of the plurality of vehicles to precondition the associated battery according to the battery preconditioning schedule. The vehicle battery preconditioning system and method further receive power grid schedule and cost information and, based on the information, generate the battery charging schedule and the battery preconditioning schedule for the plurality of vehicles.

Embodiments of the present application provide a charging/discharging apparatus, a method for charging a battery and a charging/discharging system, the charging-and-discharging apparatus including a bidirectional AC/DC converter, a first DC/DC converter, and a control unit, where the first DC/DC converter is a bidirectional DC/DC converter; and where the control unit is configured to: receive a first charging current sent by a BMS of a battery, control the bidirectional AC/DC converter and the first DC/DC converter according to the first charging current to charge the battery through an AC power; receive a first discharging current sent by the BMS and discharging a power of the battery according to the first discharging current; and receiving a second charging current sent by the BMS and control the bidirectional AC/DC converter and the first DC/DC converter according to the second charging current to charge the battery through the AC power.

A vehicle, and a balancing device and method of controlling a state of charge of a reference electrode in a battery. The balancing device includes a measurement circuit and a charging circuit. The measurement circuit is configured to obtain a measurement of a reference voltage of the reference electrode. The charging circuit is configured to adjust the reference voltage based on the measurement. The state of charge of the reference electrode is controlled based on the reference voltage.

A battery management system comprising: at least one battery comprising two or more sets of cells, each set of cells comprising one or more cells; a multiplexing switch apparatus connected to each set of cells; and at least one controller configured to use the multiplexing switch apparatus to selectively discharge the sets of cells based on at least one criterion. A battery pack comprising: at least one battery comprising two or more sets of cells, each set of cells comprising one or more cells; and an integrated switching control system comprising at least one switch connected to each set of cells, wherein the integrated switching control system is configured to control the at least one switch to discharge the sets of cells sequentially or selectively based on at least one criterion. A battery management method or a battery pack control method.

A secondary battery charging and discharging apparatus for performing a secondary battery activation process including a plurality of compression plates disposed to face each other to form a cell insert space therebetween in which a secondary battery cell is disposed, the plurality of compression plates moving to reduce a gap therebetween to press a body of the secondary battery cell; gripper units respectively mounted to the compression plates to move integrally with the compression plates, the gripper units coming into contact with an electrode lead of the secondary battery cell when the compression plate presses the body of the secondary battery cell; and push bar units respectively mounted to the compression plates to be adjacent to the gripper units and configured to press a terrace portion of the secondary battery cell adjacent to the electrode lead is provided.