Provided is a separator for a lithium ion secondary battery includes a porous resin layer that contains polyolefin as a main component. In a spectrum obtained by X-ray diffraction using a CuK-ray as a ray source, the separator has a diffraction peak (A) corresponding to a (111) crystal plane of the polyolefin.

The present disclosure relates to a novel process for preparing isotropic carbonaceous composite particles with favorable crystallographic, morphological & mechanical properties, wherein relatively fine carbonaceous primary particles are coated with a carbonaceous binder precursor material, agglomerated and finally heat-treated at temperatures of between about 1850 and 3500 C. to convert the binder precursor material to non-graphitic or graphitic carbon, thereby resulting in stable highly isotropic carbonaceous composite materials wherein the primary particles of the aggregate are held together by the carbonized/graphitized binder. The present disclosure also relates to the isotropic carbonaceous composite particles obtainable by the process described herein. The disclosure further relates to uses of said isotropic carbonaceous composite material in various applications, including as active material in negative electrodes in lithium-ion batteries, and in secondary products containing said isotropic carbonaceous composite material.

An energy storage device includes: an electrode assembly; a positive electrode current collector and a negative electrode current collector connected to the electrode assembly; and a container configured to house the electrode assembly and the positive electrode current collector and the negative electrode current collector, wherein the container has recessed portions, a connecting portion of the positive electrode current collector and a connecting portion of the negative electrode current collector respectively connected to the electrode assembly are housed in the recessed portions, respectively, the electrode assembly has a tab portion which includes a connecting portion connected to the positive electrode current collector and a tab portion which includes a connecting portion connected to the negative electrode current collector, and the tab portions have a bent portion respectively.

A case includes first and second opposed main surfaces and a side surface extending between the first and second main surfaces. An electrode body is housed in the case and including a first electrode, a second electrode, and a separator disposed between the first and second electrodes. First and second terminals are located on the side wall of the case. A first lead is electrically connected with the first electrode and extends from a side surface of the electrode body. A second lead is electrically connected with the second electrode and extends from the side surface of the electrode body. First and second connection members electrically connect the first and second leads to the first and second terminals, respectively. Each of the connection members includes a first part extending along the side surface of the case and a second part extending along the second main surface of the case.

The top cover structure of the power battery includes a cap plate, a cathode column, a conducting piece and a reversing piece, the conducting piece is electrically connected with the cathode column, the cathode column is insulatedly assembled with the cap plate; the reversing piece includes a welding part, a embossment and a joint part arranged between the welding part and the embossment, the embossment is arranged at the center of the reversing piece and protrudes towards the conducting piece, the welding part is arranged on the outer margin of the joint part; the welding part is electrically connected with the cap plate, the embossment does not contact the conducting piece, when the pressure inside the power battery increases, the reversing piece receives the pressure inside the power battery, and moves upwards, so that the embossment is electrically connected to the conducting piece.

An electrochemical device includes a storage element in which two types of electrodes are superposed on each other with a separator interposed therebetween and an outer container made of a flexible film that houses the storage element and an electrolyte solution, the two types of electrodes each including an active material-applied portion where an active material layer is formed on current collector 9, and an active material-non-applied portion, wherein each of the two types of electrodes is provided with an electrode terminal 7 and support tab 13, one end portion of electrode terminal 7 being superposed on the active material-non-applied portion of the electrode in the outer container, the other end portion of electrode terminal 7 extending to an outside of the outer container, support tab 13 sandwiching the active material-non-applied portion along with the one end portion of electrode terminal 7 in the outer container, and the active material-non-applied portion, electrode terminal 7, and support tab 13 are joined at a position where they are superposed on one another. Support tab 13 has a planar shape without any corner portion of 90 degrees or less.

A separator for a secondary battery includes a porous polymer sheet having a first surface, a second surface opposing the first surface, and a plurality of pores connecting the first surface to the second surface; and heat-resistant inorganic layers formed on at least one of the first surface or the second surface of the porous polymer sheet and on internal surfaces of the pores using an atomic layer deposition (ALD) process. The at least one of the first surface or the second surface and the internal surfaces of the pores have hydrophobically coated hydrophobic layers having hydrophobic functional groups on the heat-resistant inorganic layers.

A water-refill plug for automatically filling and refilling the cells of the battery has a housing forming a valve seat, and forming an upper and lower guides above and below the valve seat. A float is movable vertically in the housing below the seat in one of the cells of the battery. A valve body vertically movable independently of the float body has upper and lower end vertically slidable in the upper and lower guides. A magnetically attractable or repellable element or permanent magnet is provided on one of the bodies. Another permanent magnetic on the other of the bodies exerts a force via the element or magnet so the valve body is moved by the float body.

A battery pack may include a battery cell, a cradle, a board and a housing. The cradle may be coupled with the battery cell and may include one or more guide members extending from and integrally formed with a surface of the cradle. The board may be mounted to the cradle and may include a plurality of terminal contacts electrically connected with the battery cell. The one or more guide members may be adapted to guide a device into engagement with the terminal contacts. The housing may at least partially enclose the cradle and the battery cell and may include one or more guide apertures and a plurality of terminal apertures. The one or more guide members may protrude through the one or more guide apertures. Each of the terminal apertures may be aligned with a corresponding one of the plurality of contacts.

The embodiment of the present application relates to the field of Li-ion battery and, in particular, to a secondary battery. The secondary battery includes a cell, a safety component fixed on the cell and thermal conductive adhesive provided between the cell and the safety component, the thermal conductive adhesive contains at least one of hot melt adhesive, silica gel binder or epoxy resin binder, and thermal conductive filling material. The thermal conductive adhesive in the secondary battery performs good thermal conductivity and adhering property, which can stably adhere the safety component with the cell, meanwhile transferring, via the thermal conductive adhesive, heat of the cell to the safety component rapidly, so that the safety component cuts off the circuit to protect the cell during overcharge, thereby avoid situations that the thermal conductive adhesive is separated from the cell due to cell inflation and deformation.