In a battery apparatus, a battery pack includes a plurality of battery modules and a bus-bar connecting two battery modules among the plurality of battery modules. A wire connects the battery pack and the switch for controlling current supply of the battery pack. A voltage measuring circuit measures a voltage of the bus-bar, a voltage of the battery pack, and voltages of the plurality of battery modules. A processor diagnoses a connection status of the bus-bar and a connection status of the wire based on a current of the battery pack, the voltage of the bus-bar, the voltage of the battery pack, and the voltages of the plurality of battery modules.

In a battery apparatus, a battery pack includes a plurality of battery modules and a bus-bar connecting two battery modules among the plurality of battery modules. A wire connects the battery pack and the switch for controlling current supply of the battery pack. A voltage measuring circuit measures a voltage of the bus-bar, a voltage of the battery pack, and voltages of the plurality of battery modules. A processor diagnoses a connection status of the bus-bar and a connection status of the wire based on a current of the battery pack, the voltage of the bus-bar, the voltage of the battery pack, and the voltages of the plurality of battery modules.

A battery inspection apparatus capable of self-diagnosing failure is provided. The battery inspection apparatus includes a contact probe, a power supply module, a power cable for providing a path for supplying the power generated by the power supply module to the contact probe, a voltage measuring module, a measuring cable configured to measure a voltage of the contact probe by the voltage measuring module, a switching module configured to selectively connect the voltage measuring module to the power cable or the measuring cable, and a control module configured to determine whether at least one of the contact probe or the power cable is abnormal based on the voltage measurement value of the voltage measuring module according to a connection state of the switching module. A verification device capable of diagnosing failure of the battery inspection apparatus is also provided.

The present technology relates to a battery cell jig including film-type pressure sensors, and a method of measuring a swelling of a battery cell using the same. According to the present invention, by using film-type pressure sensors, the volume of the measuring apparatus can be reduced, and abnormal degeneration of the battery cell by the pressure difference for each location of the battery cell can be prevented.

A lithium battery system comprising a battery and a feedback current control apparatus having a first current capture device that comprises: a first feedback current capture module for capturing feedback current; a first switch module for conducting or unidirectionally cutting off a main circuit; and a control module for receiving a first voltage of one end of a driver on the main circuit, a second voltage of one end of the battery, and the temperature of the battery. When a difference between the first and second voltage is greater than a preset voltage and the temperature of the battery is less than or equal to a preset temperature, the first switch module is controlled to unidirectionally cut off the main circuit to capture feedback current by the first feedback current capture module on a first current capture circuit, greatly reducing the probability of lithium precipitation and risk of thermal runaway.

A device for charging and discharging a battery cell, and a method of charging and discharging a battery cell are provided. The device includes a pair of jigs configured to fix respective electrode leads of the battery cell. Each jig includes a first jig block configured to press a first surface of a corresponding electrode lead of the battery cell, a second jig block configured to press a second surface of the corresponding electrode lead facing the first surface of the corresponding electrode lead, a first jig block control unit connected to the first jig block to move the first jig block toward the first surface of the corresponding electrode lead, and an interval adjusting member arranged between the first and second jig blocks to control an interval between the first and second jig blocks.

A device for charging and discharging a battery cell, and a method of charging and discharging a battery cell are provided. The device includes a pair of jigs configured to fix respective electrode leads of the battery cell. Each jig includes a first jig block configured to press a first surface of a corresponding electrode lead of the battery cell, a second jig block configured to press a second surface of the corresponding electrode lead facing the first surface of the corresponding electrode lead, a first jig block control unit connected to the first jig block to move the first jig block toward the first surface of the corresponding electrode lead, and an interval adjusting member arranged between the first and second jig blocks to control an interval between the first and second jig blocks.

Methods for activating a secondary battery are provided, as well as methods for manufacturing a secondary battery, which include: providing a secondary battery including an electrode assembly and an electrolyte solution in a battery case, pre-aging the secondary battery at room temperature to provide a pre-aged secondary battery; initially charging the pre-aged secondary battery to provide an initially-charged secondary battery; aging the initially-charged secondary battery at room temperature to provide a room-temperature-aged secondary battery; fully charging the room-temperature-aged secondary battery to a voltage of 4.4V or more to provide a fully-charged secondary battery; and degassing the charged secondary battery to remove gas inside the fully-charged secondary battery. According to these methods, it is possible to increase the remaining amount of an electrolyte solution inside an electrode by fully charging a secondary battery.

Methods for activating a secondary battery are provided, as well as methods for manufacturing a secondary battery, which include: providing a secondary battery including an electrode assembly and an electrolyte solution in a battery case, pre-aging the secondary battery at room temperature to provide a pre-aged secondary battery; initially charging the pre-aged secondary battery to provide an initially-charged secondary battery; aging the initially-charged secondary battery at room temperature to provide a room-temperature-aged secondary battery; fully charging the room-temperature-aged secondary battery to a voltage of 4.4V or more to provide a fully-charged secondary battery; and degassing the charged secondary battery to remove gas inside the fully-charged secondary battery. According to these methods, it is possible to increase the remaining amount of an electrolyte solution inside an electrode by fully charging a secondary battery.

A battery management system includes a voltage measurement circuit for generating a voltage signal indicating a cell voltage of each of a plurality of battery cells connected in series, and a controller. The controller determines an observation matrix including a plurality of observation voltage vectors indicating a voltage history of each of the plurality of battery cells in a moving window having a predetermined size based on the voltage signal. The controller determines a recovery matrix including a plurality of recovery voltage vectors corresponding to the plurality of observation voltage vectors in a one-to-one relationship. The controller detects an abnormality of each of the plurality of battery cells based on a plurality of absolute error vectors indicating a difference between the plurality of observation voltage vectors and the plurality of recovery voltage vectors.