The flat-shaped battery of the present invention comprises a battery container provided with an outer can and a sealing plate, and a positive electrode, a negative electrode, a separator, and an electrolyte solution are enclosed in the battery container. The positive electrode is housed in the outer can, and a porous electrolyte solution absorber is inserted between the positive electrode and an inner bottom surface of the outer can. Also, the method for manufacturing a flat-shaped battery, including: disposing an electrolyte solution absorber on an inner bottom surface of the outer can; disposing the positive electrode on the electrolyte solution absorber; and injecting the electrolyte solution into the outer can after disposing the electrolyte solution absorber, before or after disposing the positive electrode. A porous body having a porosity of 40 to 90% is used as the electrolyte solution absorber.

The flat-shaped battery of the present invention comprises a battery container provided with an outer can and a sealing plate, and a positive electrode, a negative electrode, a separator, and an electrolyte solution are enclosed in the battery container. The positive electrode is housed in the outer can, and a porous electrolyte solution absorber is inserted between the positive electrode and an inner bottom surface of the outer can. Also, the method for manufacturing a flat-shaped battery, including: disposing an electrolyte solution absorber on an inner bottom surface of the outer can; disposing the positive electrode on the electrolyte solution absorber; and injecting the electrolyte solution into the outer can after disposing the electrolyte solution absorber, before or after disposing the positive electrode. A porous body having a porosity of 40 to 90% is used as the electrolyte solution absorber.

A lithium-ion battery system which can appropriately determine the presence or absence of an abnormality of a unit cell. It is provided with an assembled battery formed by stacking a plurality of battery units, each of the plurality of battery units including a unit cell consisting of a lithium-ion battery and a signal output part provided in the unit cell; a signal receiving part for receiving an optical signal output by the signal output part in each of the plurality of battery units; an analysis processing part for analyzing the optical signal received by the signal receiving part; and a state determination part for determining that the assembled battery is abnormal in accordance with the analysis result of the analysis processing part.

An electrode for a secondary battery includes a plurality of active material particles. A length of each of the active material particles in a first direction along a thickness direction of the electrode is larger than a length of the active material particle in a second direction intersecting the first direction.

There is provided a secondary zinc battery including: a unit cell including; a positive-electrode plate including a positive-electrode active material layer and a positive-electrode collector; a negative-electrode plate including a negative-electrode active material layer containing zinc and a negative-electrode collector; an LDH separator covering or wrapping around the entire negative-electrode active material layer; and an electrolytic solution. The positive-electrode collector has a positive-electrode collector tab extending from one edge of the positive-electrode active material layer, and the negative-electrode collector has a negative-electrode collector tab extending from the opposite edge of the negative-electrode active material layer and beyond a vertical edge of the LDH-like compound separator. The unit cell can thereby collects electricity from the positive-electrode collector tab and the negative-electrode collector tab that are disposed at opposite edges of the unit cell. The LDH-like compound separator has at least two continuous closed edges.

An alkaline electrochemical cell includes a cathode, an anode which includes an anode active material, and a non-conductive separator disposed between the cathode and the anode, wherein from about 20% to about 50% by weight of the anode active material relative to a total amount of anode active material has a particle size of less than about 75 μm, and wherein the separator includes a unitary, cylindrical configuration having an open end, a side wall, and integrally formed closed end disposed distally to the open end.

A high voltage zinc (Zn)-anode battery comprising a cathode comprising a cathode electroactive material; an anode comprising a Zn electroactive material; a catholyte in contact with the cathode, wherein the catholyte is not in contact with the anode; an anolyte in contact with the anode, wherein the anolyte is not in contact with the cathode; and a separator disposed between the anolyte and the catholyte. The catholyte has a pH of less than 4, and the anolyte has a pH of greater than 10. The separator has ion-selective properties.

A primary or rechargeable battery comprising a battery housing; a cathode comprising a cathode electroactive material a conductive carbon, and a binder; an anode comprising an anode electroactive material; an electrolyte; and a conductive interlayer; and wherein the cathode, the anode, the electrolyte, and the conductive interlayer are disposed within the battery housing. The cathode electroactive material comprises manganese dioxide, any polymorphs thereof, or combinations thereof. The cathode is configured to access 20-100% of 1.sup.st electron capacity of the cathode electroactive material. The conductive interlayer contacts the cathode. The conductive interlayer comprises (i) a binder and (ii) a conductive carbon, a metal hydroxide, a metal oxide, or combinations thereof.

A battery pack includes a plurality of battery modules that includes a plurality of battery cells, a battery cell holder, a second-electrode assembly including a plurality of second-electrode bus bar plates, a first-electrode assembly, and a cover. The first-electrode assembly includes a plurality of first-electrode bus bar plates, a first-electrode terminal, a second-electrode terminal connected to one of the plurality of second-electrode bus bar plates, and an inter-electrode bus bar connecting the second-electrode bus bar plate and one of the first-electrode bus bar plate and the first-electrode terminal. The first-electrode assembly is in a first pattern or a second pattern. An arrangement of the first-electrode terminal and the second-electrode terminal in the battery module differs according to the pattern of the first-electrode assembly.

The present invention relates to a method for improving the operational efficiency of a battery pack (100) comprising at least two battery modules (10, 10′, 10″), wherein each battery pack is configured to have a common gas space (29). The method comprises the steps of: obtaining data (101) on the battery modules (10, 10′, 10″), wherein the data relates to the number of battery cells per battery module, the number of battery modules, the temperature of each battery module and the energy capacity of the battery modules; obtaining (102) an indication of the internal resistance (R.sub.i1, R.sub.i2, R.sub.i3) for the battery modules; determining (104), in case a difference in indication parameters between any of the battery modules exceeds a first threshold value, a filling amount of oxygen to be filled into the battery pack; and initiating (107) filling of the battery pack based on the determined filling amount of oxygen.