摘要:
A charging and discharging device includes a switching circuit 44, an input of which is connected to a power supply, the switching circuit 44 adjusting an output current IB to a power storing unit 60 connected to an output of the switching circuit 44, and a control unit 46 configured to generate an ON/OFF signal DGC to the switching circuit 44. The control unit 46 includes a temperature-rise control unit 70 configured to separately generate, based on a signal BTMP equivalent to the temperature of the power storing unit 60, a control signal FC for adjusting a ripple component of the output current IB and a control signal OFS for adjusting a non-ripple component of the output current IB and generates the ON/OFF signal DGC based on the control signal FC and the control signal OFS and outputs the ON/OFF signal DGC to the switching circuit 44.
摘要:
A storage battery deterioration measurement device and a power storage system are provided which measure deterioration in unit batteries included in an assembled battery constituting a storage battery in a shorter time than conventional devices and systems, and which include a control unit 10 to acquire information based on the states of the multiple unit batteries 1 and a deterioration determination unit 11 to detect the unit battery 1 indicating the maximum value among the information acquired by the control unit 10 and the unit battery 1 indicating the minimum value thereamong, and to detect deterioration in the unit batteries 1 on the basis of the difference between a per-predetermined-period variation of information on the unit battery 1 indicating the maximum value and a per-predetermined-period variation of information on the unit battery 1 indicating the minimum value.
摘要:
A cell developed to solve the problem of a conventional cell having a negative electrode containing metallic lithium that a large short-circuit current flows when the temperature of the cell is raised due to internal short circuit, whereby the temperature of the cell is further raised due to heat buildup and a further increased short-circuit current flows. Specifically a cell in which a negative electrode (2) contains metallic lithium, a positive electrode (1) contains a positive electrode active material (8) and an electron conductive material (9) in contact with the positive electrode active material (8), and an electrolytic layer (3) is sandwiched between the positive electrode (1) and the negative electrode (2). The electron conductive material (9) contains an electrically conductive filler and a resin and has resistance increasing with temperature.
摘要:
A charge/discharge device (1) that controls charge/discharge of an electric-power storage apparatus (2) comprises a heating determination unit (31) that determines whether to heat the electric-power storage apparatus (2) based on a temperature of the electric-power storage apparatus (2) at a time of starting up the electric-power storage apparatus (2), and a heating control unit (32) that, when it is determined to heat the electric-power storage apparatus (2), obtains a frequency characteristic of a resistance value of an internal resistance of the electric-power storage apparatus (2) corresponding to a temperature and a charge level of the electric-power storage apparatus (2) and performs control of alternately repeating charge and discharge of the electric-power storage apparatus (2) in a charge/discharge period specified based on the frequency characteristic.
摘要:
When a continuous short-circuit occurs between both terminals of a battery pack, there is a possibility of a failure, destruction and rupture of the battery due to heating; thus, flowing of electricity needs to be immediately interrupted. Further, a problem lies in that when a momentary short-circuit occurs, a user continues to use, without knowing such a thermal and electrical damage to the batteries, storage batteries under a situation in which reliability for the batteries is impaired, To overcome the problem, in a battery pack configured by connecting a plurality of storage batteries in series, at least one storage battery is included which has a low capacity compared to the other batteries during high rate discharge, and at least one specific storage battery undergoes polarity inversion during external short-circuit, thereby preventing the other batteries from becoming damaged.
摘要:
A cell developed to solve the problems of a conventional cell that a large short-circuit current flows when the temperature of the cell is raised due to internal short circuit, whereby the temperature of the cell is further raised due to heat buildup and a further increased short-circuit current flows, and that when an aluminum-laminated bag is used as a covering member in order to seal the cell body, the sealed port is apt to be opened due to temperature rise, leaving the problem of safety. Specifically a cell in which at least either a positive electrode (1) or a negative electrode (2) is provided with an active material layer (6) containing an active material (8) and an electron conductive material (9) in contact with the active material (8), and an electrolyte layer (3) is sandwiched between the positive electrode (1) and the negative electrode (2) thereby to constitute a cell body (11). The cell body is sealed with a covering member (14) made of aluminum (13) and a thermally fusible resin (12). The electron conductive material (9) contains an electrically conductive filler and a resin and has a resistance increasing with temperature.
摘要:
A controller (240) of a battery monitoring apparatus (200), said controller calculating the amount of heat generated inside a battery (110) on the basis of information about the electric current which flows out of or flows into the battery (110). Furthermore, the controller (240) calculates the amount of heat discharged from the surface of the battery (110), said amount being calculated on the basis of temperature information about at least one from among the surface of the battery (110) and a substance in the vicinity of the battery (110). In addition, the controller (240) calculates the temperature inside the battery (110) on the basis of information about the amount of heat generated, and information about the amount of heat discharged.
摘要:
A thin battery comprising a battery body and a flexible package. The battery body comprises a laminate or coil including a positive plate, a negative plate, and a separator between them; and a plurality of leads connected to the positive and negative plates. The package, in which the battery body is placed, is charged with electrolyte and sealed in such a manner that the inner pressure is lower than atmospheric pressure and higher than the vapor pressure of the electrolyte. This battery is kept from generation of gas in the package during storage at high temperature and from the increase in the inner pressure due to expansion of gas.
摘要:
A battery-condition monitoring device (100) that monitors a condition of the battery (10) through discharge thereof includes a discharger (15) and a discharge control device (3). The discharger (15) includes a discharge circuit having a load resistor (1) and a switching element (2) connected in series between a positive electrode of the battery (10) and a negative electrode thereof. The discharge control device (3) controls an open/close operation of the switching element (2). The discharge control device (3) adjusts the resistance value of the load resistor (1) in the discharger (15), thereby enabling an adjustment of a discharge current.