Abstract: A battery comprise: a housing made by a metal or a metal alloy; a battery core in the housing comprising a positive plate, a separator and a negative plate; an electrolyte in the housing; a cover assembly having a positive terminal electrically connected with the positive plate and a negative terminal electrically connected with the negative plate; and a protection component to prevent the housing from being corroded by the electrolyte.

Abstract: An electrochemical storage cell having a coiled core is disclosed. The coiled core includes a cathode sheet, an anode sheet, and a separator sheet. An anode connector is connected with the anode sheet at a first end of the coiled core and a cathode connector is connected with the cathode sheet at a second, opposite end of the coiled core. The coiled core has a length Lcore and a width Wcore and each connector has a width Wconnector. The length of the coiled core Lcore, width of the coiled core Wcore, and width of each connector Wconnector have the relationship 0<(Wcore?Wconnector)/Lcore<0.37.

Abstract: A battery comprise: a housing made by a metal or a metal alloy; a battery core in the housing comprising a positive plate, a separator and a negative plate; an electrolyte in the housing; a cover assembly having a positive terminal electrically connected with the positive plate and a negative terminal electrically connected with the negative plate; and a protection component to prevent the housing from being corroded by the electrolyte.

Abstract: A method and a device for controlling battery heating is disclosed. The method comprises: starting battery heating when conditions for starting battery heating are met; and stopping battery heating when conditions for stopping battery heating are met. The conditions for stopping battery heating include at least one of the following: (a) an absorbed energy Q of the battery reaching a predetermined energy QSET; (b) a time period Ti during which a discharging current I of the battery maintains constant (c) the discharging current I starting to decrease when a predetermined time period TSET is reached; and (d) a heating time period T reaching a predetermined maximum heating time period Tmax. The method and the device consider multiple conditions, for example, temperature, discharging current, battery State-of-Charge, heating time, etc. to determine when to stop battery heating, which may further enhance the operating efficiency and lifespan of the battery.

Abstract: A battery system having interconnected battery packs is disclosed. Each battery pack includes a plurality of rectangular prismatic shaped cells. Each cell includes a positive terminal at one end and a negative terminal at the other end. The cells are housed in a battery pack housing in a side-by-side manner. The cells may be electrically connected in series so that the positive terminal for a cell extends toward and contacts the negative terminal of an adjacent cell and the negative terminal for the cell extends toward and contacts the positive terminal of another adjacent cell.

Abstract: An electrochemical storage cell having a coiled core is disclosed. The coiled core includes a cathode sheet, an anode sheet, and a separator sheet. An anode connector is connected with the anode sheet at a first end of the coiled core and a cathode connector is connected with the cathode sheet at a second, opposite end of the coiled core. The coiled core has a length Lcore and a width Wcore and each connector has a width Wconnector. The length of the coiled core Lcore, width of the coiled core Wcore, and width of each connector Wconnector have the relationship 0<(Wcore?Wconnector)/Lcore<0.37.