Abstract: A battery (30) is disclosed which comprises: a housing (32) containing an electrolyte solution; a plurality of jelly roll electrode assemblies (10) arranged substantially in parallel with each other in contact with the electrolyte solution within the housing (32) thereby forming a single electrochemical system of the battery (30), each jelly roll electrode assembly (10) having a first end (10A) and an opposing second end (10B); and a current collector plate (20); wherein the current collector plate (20) is arranged to be shared among and in direct physical and electrical contact with the first ends (10A) of the plurality of jelly roll electrode assemblies (10).

Abstract: An anode active material for a lithium-ion battery with greatly reduced recharging time includes SiO particles, graphite particles, and a carbon coating layer. The graphite particles and SiO particles are processed to form spherical SiO/graphite composite particles. A layer of carbon coating is applied to the surface of the SiO/graphite composite particle and the resulting anode active material resembles a pomegranate structure.

Abstract: A battery (10) comprises a safety vent assembly (100). The safety vent assembly (100) comprises a sealing member (104) and an urging member (106) to urge the sealing member (104) against a venting aperture (105) on a battery reaction chamber to seal the battery reaction chamber when pressure inside the battery reaction chamber is below a venting threshold pressure under normal operation conditions, wherein the sealing member (104) is operable to provide a venting path to vent gas from the battery chamber when pressure inside the battery chamber reaches the venting threshold pressure which is sufficient to overcome the urging force of the sealing member (104), and wherein the urging member (106) is to permanently deform on reaching a venting threshold temperature such that gas venting from the battery chamber will occur at a pressure below the venting threshold pressure.

Abstract: A battery cell comprises a positive electrode, a negative electrode, and a separator which separates the positive and negative electrodes. Specifically, a non-reactive conductive substance is dispersed in a starch layer distributed between an electrode and the separator. The present invention is advantageous for reducing the internal resistance between the electrode and the separator.

Abstract: A prismatic battery cell or an electronic component comprising an electrode plate group of alternately stacked positive and negative electrode plates, wherein adjacent electrode plates of opposite polarity are insulated by an insulating separator, and electrode plates of one polarity are bent to converge at a common joining location for connecting together as a lead portion, the lead portion being joined together to a current collector of that one polarity, characterized in that the electrode plates are bent after the electrode plates are stacked and held or bundled together. Shaping the electrode plates to form the lead portions while the electrode plates are held in a stack means it is not necessary to handle pre-shaped electrode plates, since handling pre-shaped electrode plates in a production line could be tedious because the electrode plates are quite easily deformable.

Abstract: A method of determining the state of charge (SOC) of a rechargeable battery, the method comprising charging the battery using a substantially constant charge current; measuring the battery temperature; and conducting a first measurement of the battery voltage at a time interval, t1, from the start of the charging, and a second measurement of the battery voltage at a time interval, t2, from the first measurement.