A system and method are described permitting a sophisticated control of a battery composed of a multiplicity of three-terminal electrochemical cells. Each cell has first and second terminals, connected with respective electrodes, one of which is a positive terminal and one of which is a negative terminal. Each cell has a third terminal connected with a grid electrode. A battery is composed of N cells. For each of the N cells, there is provided a respective capacitor switchably coupled to the second and third terminals thereof. A controller is connected through a switching matrix to the capacitors. In operation, the controller is connected sequentially to each capacitor among the multiplicity of capacitors, during which time the capacitor is momentarily uncoupled from its respective cell. When the controller is connected to one of the capacitors, it measures the voltage thereupon. The controller can then charge up or discharge the capacitor to drive it to a desired voltage level. Thereafter, the capacitor is disconnected from the controller and is coupled again to its respective cell.

Embodiments include methods and products for evaluating microbatteries. The microbattery includes a cathode layer, an anode layer physically separated from the cathode layer, and an electrolyte layer in contact with the anode and the cathode. The microbattery also includes at least one auxiliary electrode in physical contact with the electrolyte layer, the auxiliary electrode containing at least one metal coating and at least one non-conductive film, wherein the at least one metal coating is physically separated from the cathode and the anode.

Embodiments include methods and products for evaluating microbatteries. The microbattery includes a cathode layer, an anode layer physically separated from the cathode layer, and an electrolyte layer in contact with the anode and the cathode. The microbattery also includes at least one auxiliary electrode in physical contact with the electrolyte layer, the auxiliary electrode containing at least one metal coating and at least one non-conductive film, wherein the at least one metal coating is physically separated from the cathode and the anode.

The present invention discloses a multi-functional battery box, belonging to the field of power supply devices; a multi-functional battery box, comprising: a case, having an accommodating cavity; a printed circuit board, located in the accommodating cavity and permanently connected with the case; a power source, located in the accommodating cavity and in contact with the printed circuit board; an electro-acoustic transducer, permanently arranged on the printed circuit board and electrically connected with the printed circuit board; a spring piece, arranged on the case and in contact with the printed circuit board; a change-over switch, flexibly connected with the printed circuit board; the present invention has two switching modes that can be flexibly switched, making the battery box easier and more flexible to use, reducing the loss to the switch and prolonging the life of the battery box.

A method recalibrates in situ a comparison electrode integrated into an electrochemical system. The electrochemical system includes a working electrode, a counter electrode, and an electrolyte. The method includes verifying a potential of the comparison electrode relative to the working electrode or to the counter electrode in situ, detecting whether there is a drift in the potential of the comparison electrode relative to a potential plateau for which the comparison electrode was functionalized or designed, and when the drift is detected, recalibrating the comparison electrode in situ.

The present invention relates to a lithium-ion energy store, comprising an electrode comprising a main section and comprising a measurement section electrically isolated from the main section, a counterelectrode and a separator between the electrode and the counterelectrode, wherein a measurement cell, which forms part of the lithium-ion energy store, comprises the measurement section of the electrode, a counterelectrode measurement section, which is opposite the measurement section of the electrode in relation to the separator, and a section of the separator which is arranged between the measurement sections of the electrode and the counterelectrode measurement section, and a main cell, which forms part of the lithium-ion energy store, the main section of the electrode, a counterelectrode main section, which is opposite the main section of the electrode in relation to the separator, and a section of the separator which is arranged between the main section of the electrode and the counterelectrode main section, wherein the lithium-ion energy store comprises a matching device, by means of which an electrical potential of the measurement section and an electrical potential of the main section can be matched to one another.

Supplemental lithium can be used to stabilize lithium ion batteries with lithium rich metal oxides as the positive electrode active material. Dramatic improvements in the specific capacity at long cycling have been obtained. The supplemental lithium can be provided with the negative electrode, or alternatively as a sacrificial material that is subsequently driven into the negative electrode active material. The supplemental lithium can be provided to the negative electrode active material prior to assembly of the battery using electrochemical deposition. The positive electrode active materials can comprise a layered-layered structure comprising manganese as well as nickel and/or cobalt.

A system and method are described permitting a sophisticated control of a battery composed of a multiplicity of three-terminal electrochemical cells. Each cell has first and second terminals, connected with respective electrodes, one of which is a positive terminal and one of which is a negative terminal. Each cell has a third terminal connected with a grid electrode. A battery is composed of N cells. For each of the N cells, there is provided a respective capacitor switchably coupled to the second and third terminals thereof. A controller is connected through a switching matrix to the capacitors. In operation, the controller is connected sequentially to each capacitor among the multiplicity of capacitors, during which time the capacitor is momentarily uncoupled from its respective cell. When the controller is connected to one of the capacitors, it measures the voltage thereupon. The controller can then charge up or discharge the capacitor to drive it to a desired voltage level. Thereafter, the capacitor is disconnected from the controller and is coupled again to its respective cell.

Described embodiments include a system and a method. A system includes a controllable electrochemical cell configured to output electric power. The controllable cell includes an electrolyte and a first working electrode configured to transfer electrons to or from the electrolyte. The controllable cell includes a second working electrode configured to transfer electrons to or from the electrolyte. The controllable cell includes a gating electrode spaced-apart from the second working electrode. The gating electrode is configured, if biased relative to the second working electrode, to modify an electric charge, field, or potential in the space between the electrolyte and the second working electrode. The controllable cell includes a control circuit coupled to the gating electrode of the controllable cell and configured to apply a biasing signal responsive to an electrical property of an external electrical load coupled to the controllable cell.

The present invention relates to a method for controlling a regeneration procedure of a lithium battery cell (1) which comprises an anode (2), a cathode (3) and the regeneration electrode (4). The method comprises: detecting a current availability of cyclable lithium in the anode (2); detecting a current availability of cyclable lithium in the cathode (3); passing a first current (I.sub.1) between the anode (2) and the regeneration electrode (4) until the actual availability of cyclable lithium in the anode (2) corresponds to a targeted availability of cyclable lithium in the anode (2); and passing a second current (I2) between the cathode (3) and the regeneration electrode (4) until the current availability of cyclable lithium in the cathode (3) corresponds to a targeted availability of cyclable lithium in the cathode (3).