Abstract: Discussed is a battery pack diagnosis method including a battery pack manufacturing process, a battery cell charging and discharging process, a battery pack thermal image photographing process, a thermal image reading process, a battery pack magnetic field image photographing process, a magnetic field image reading process, and a wire bonding state defect determining process of finally determining a bonding state of a battery cell and a wire by combining thermal image reading result information obtained in the thermal image reading process and magnetic field image reading result information obtained in the magnetic field image reading process in order to exactly diagnose the bonding state of the battery cell and the wire connecting the battery cell in the battery pack.

Abstract: A battery module a plurality of battery cells, a module case configured to accommodate the plurality of battery cells, an air intake unit provided to one side of the module case and configured to guide an air into the module case to cool the plurality of battery cells, an air discharge unit provided to the other side of the module case and configured to discharge the air introduced into the module case through the air intake unit to the outside of the module case, and at least one sheet member attached to an inner wall of the module case between the air discharge unit and the air intake unit and configured to expand at a predetermined temperature or above to seal an inner space of the module case.

Abstract: A gas venting induction block includes a block body having a slit configured to accommodate a cell terrace of a pouch-type secondary battery inserted through the slit to a first distance. The gas venting induction block further includes a pocket portion inside the block body. The pocket portion accommodates a portion of the cell terrace having a space larger than the slit. The gas venting induction block further includes an exhaust pipe having a tubular shape and extends from the pocket portion to an outer surface of the block body. The exhaust pipe includes a needle portion protruding toward an inner space of the pocket portion so as to perforate the cell terrace when the cell terrace expands beyond a first volume in the pocket portion.

Abstract: A battery module includes a plurality of battery cells each having an electrode lead, a module case configured to receive the plurality of battery cells, an ICB assembly having a busbar electrically connected to the electrode lead, and a swelling sensing means configured to sense swelling of the battery cell. Swelling of the battery cell is sensed in an early stage.

Abstract: A battery module includes a plurality of battery cells, a module case configured to accommodate the plurality of battery cells, an air intake unit provided to one side of the module case and configured to guide an air into the module case to cool the plurality of battery cells, an air discharge unit provided to the other side of the module case and configured to discharge the air introduced into the module case through the air intake unit to the outside of the module case, and at least one sheet member attached to an inner wall of the module case between the air discharge unit and the air intake unit and configured to expand at a predetermined temperature or above to seal an inner space of the module case.

Abstract: Discussed is a battery pack diagnosis method including a battery pack manufacturing process, a battery cell charging and discharging process, a battery pack thermal image photographing process, a thermal image reading process, a battery pack magnetic field image photographing process, a magnetic field image reading process, and a wire bonding state defect determining process of finally determining a bonding state of a battery cell and a wire by combining thermal image reading result information obtained in the thermal image reading process and magnetic field image reading result information obtained in the magnetic field image reading process in order to exactly diagnose the bonding state of the battery cell and the wire connecting the battery cell in the battery pack.

Abstract: An apparatus for detecting a defect of a battery pack may disconnect a battery cell at which a defect is detected inside a battery pack to remove a risk factor that may occur from the corresponding battery cell. Risk factors that may cause explosions can be eliminated by discharging the battery cell at which a defect is detected. In addition, the recurrence of the risk factor can be prevented in advance by disconnecting the battery cell at which the defect is detected from the battery pack.

Abstract: A battery management system of a battery cell assembly including a plurality of cells, includes a plurality of first cell balancing resistors and a plurality of first cell balancing switches connected between a positive electrode and a negative electrode of a corresponding first cell among the plurality of cells; and a plurality of second cell balancing resistors and a plurality of second cell balancing switches connected between the positive electrode and the negative electrode of the corresponding first cell, wherein a first cell balancing current flowing during an on period of each first cell balancing switch is greater than a second cell balancing current flowing during an on period of each second cell balancing switch.

Abstract: Discussed is a secondary battery and a method for detecting lithium dendrite of the secondary battery. The secondary battery includes: a positive electrode and a negative electrode; a battery case configured to accommodate the positive electrode and the negative electrode; and a lithium dendrite detector provided at a tab of the positive electrode at a side of the battery case to detect lithium dendrite.

Abstract: An apparatus for detecting a defect of a battery pack may disconnect a battery cell at which a defect is detected inside a battery pack to remove a risk factor that may occur from the corresponding battery cell. Risk factors that may cause explosions can be eliminated by discharging the battery cell at which a defect is detected. In addition, the recurrence of the risk factor can be prevented in advance by disconnecting the battery cell at which the defect is detected from the battery pack.

Abstract: Disclosed are a communication method between a master controller and slave controllers, a slave controller for the communication method, and a battery management system using the communication method and the slave controller, in which the master controller receives safety information about battery cells through a plurality of channels even when each of a plurality of slave controllers includes only one micro controller unit, thereby minimizing the increase in the cost and enhancing the safety of the battery management system. The communication method includes performing bidirectional communication between a master controller and first to Nth (where N is an integer equal to or more than two) slave controllers through a first communication channel, and receiving, by the master controller, an indication signal through a second communication signal via the first to Nth slave controllers.

Abstract: An apparatus and a method of detecting liquid leakage within a battery pack using a gyro sensor and a moisture detecting sensor. When liquid leakage of a coolant is detected, such as when a pipe of a coolant supplied for cooling (radiating heat) within a battery pack is damaged, the apparatus recognizes a liquid leakage generation position according to a slope of the battery pack by using a gyro sensor and determines whether the liquid leakage is generated based on a difference in a temperature between an upper side and a lower side of a corresponding region by using moisture detecting sensors, thereby improving accuracy of the detection of the liquid leakage according to the slope and the position of the battery pack. Particularly, the moisture detecting sensor is operated to be on only when the detection of the liquid leakage is required, thereby preventing unnecessary energy consumption.

Abstract: A shunt resistor for enhancing accuracy of current detection in the process of detecting current flowing through the shunt resistor and an apparatus for detecting current including the same. The shunt resistor includes two busbars made of an electrically conductive material and spaced apart a predetermined distance, a first connection element made of an electrically conductive material and configured to be mounted in a first busbar provided on one side among the two busbars, and a second connection element made of an electrically conductive material and configured to be mounted in a second busbar provided on the other side among the two busbars. The first connection element and the second connection element are configured to have an increase or decrease in an area of direct or indirect contact between the first connection element and the second connection element.

Abstract: Disclosed is battery cell including a reception unit of a battery case having an electrode assembly and an electrolytic solution received therein, a gas storage unit disposed outside the reception unit, a storage space in the gas storage unit being partitioned into two or more sections, and a sensor, wherein a signal is sensed by the sensor when the two or more sections of the gas storage unit are filled with gas. In the case in which the sensed signal deviates from a predetermined value, an alarm member signals danger, whereby an accident is prevented.

Abstract: A battery management system of a battery cell assembly including a plurality of cells, includes a plurality of first cell balancing resistors and a plurality of first cell balancing switches connected between a positive electrode and a negative electrode of a corresponding first cell among the plurality of cells; and a plurality of second cell balancing resistors and a plurality of second cell balancing switches connected between the positive electrode and the negative electrode of the corresponding first cell, wherein a first cell balancing current flowing during an on period of each first cell balancing switch is greater than a second cell balancing current flowing during an on period of each second cell balancing switch.

Abstract: An apparatus, a battery system and a method for controlling a main battery and a sub battery. The apparatus includes a first main switch connectable between the main battery and an electrical load, a second main switch connectable between the sub battery and the electrical load, a sub switch connectable between the main battery and the sub battery, a main battery management system and a sub battery management system. The main battery management system transmits a first diagnosis message to the sub battery management system, when a fault of the main battery is detected. The sub battery management system induces the second main switch into a turn on state, in response to the first diagnosis message.

Abstract: Disclosed is a battery module, which includes a base plate; a plurality of battery cells disposed on the base plate; a plurality of sockets electrically connected to electrode leads of the battery cells; and a plurality of connecting bars configured to be inserted into a part of the plurality of sockets to allow the plurality of battery cells to be connected in a serial pattern or a combined serial and parallel pattern.

Abstract: Disclosed are a communication method between a master controller and slave controllers, a slave controller for the communication method, and a battery management system using the communication method and the slave controller, in which the master controller receives safety information about battery cells through a plurality of channels even when each of a plurality of slave controllers includes only one micro controller unit, thereby minimizing the increase in the cost and enhancing the safety of the battery management system. The communication method includes performing bidirectional communication between a master controller and first to Nth (where N is an integer equal to or more than two) slave controllers through a first communication channel, and receiving, by the master controller, an indication signal through a second communication signal via the first to Nth slave controllers.

Abstract: A battery module includes a plurality of battery cells, a module case configured to accommodate the plurality of battery cells, an air intake unit provided to one side of the module case and configured to guide an air into the module case to cool the plurality of battery cells, an air discharge unit provided to the other side of the module case and configured to discharge the air introduced into the module case through the air intake unit to the outside of the module case, and at least one sheet member attached to an inner wall of the module case between the air discharge unit and the air intake unit and configured to expand at a predetermined temperature or above to seal an inner space of the module case.

Abstract: Disclosed are a communication method between a master controller and slave controllers, a slave controller for the communication method, and a battery management system using the communication method and the slave controller, in which the master controller receives safety information about battery cells through a plurality of channels even when each of a plurality of slave controllers includes only one micro controller unit, thereby minimizing the increase in the cost and enhancing the safety of the battery management system. The communication method includes performing bidirectional communication between a master controller and first to Nth (where N is an integer equal to or more than two) slave controllers through a first communication channel, and receiving, by the master controller, an indication signal through a second communication signal via the first to Nth slave controllers.