A battery and an electronic device are disclosed. The battery is component to the electronic device, and includes: a first cathode plate including a first surface oriented in a first direction, and a second surface oriented in a second direction opposite to the first direction, a first separation membrane disposed on the second surface of the first cathode plate, a first anode plate disposed on a surface of the separation membrane oriented in the second direction, a through hole formed adjacent to respective center portions of the first cathode plate, the first separation membrane, and the first anode plate, wherein the through hole is substantially perpendicular to one surface of the first cathode plate, a cathode tab disposed within the through hole and electrically connected to the first cathode plate, and an anode tab spaced apart from the cathode plate within the through hole and electrically connected to the first anode plate, wherein the cathode tab and the anode tab are at least partially exposed to an external environment through the through hole.

A battery and an electronic device are disclosed. The battery is component to the electronic device, and includes: a first cathode plate including a first surface oriented in a first direction, and a second surface oriented in a second direction opposite to the first direction, a first separation membrane disposed on the second surface of the first cathode plate, a first anode plate disposed on a surface of the separation membrane oriented in the second direction, a through hole formed adjacent to respective center portions of the first cathode plate, the first separation membrane, and the first anode plate, wherein the through hole is substantially perpendicular to one surface of the first cathode plate, a cathode tab disposed within the through hole and electrically connected to the first cathode plate, and an anode tab spaced apart from the cathode plate within the through hole and electrically connected to the first anode plate, wherein the cathode tab and the anode tab are at least partially exposed to an external environment through the through hole.

The present disclosure relates to a secondary battery module including a nonaqueous electrolyte secondary battery and an elastic body. The elastic body has a compressive elastic modulus of 5 MPa to 120 MPa. The nonaqueous electrolyte secondary battery includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector containing Ti as a main component and having a thickness of 1 μm to 8 μm. The negative electrode includes a first layer and a second layer sequentially formed from a side with the negative electrode collector. The first layer contains negative electrode active material particles containing first carbon-based active material particles with a 10% proof stress of 3 MPa or less. The second layer contains negative electrode active material particles containing second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.

A lithium secondary battery includes a positive electrode, a negative electrode, and a porous separator disposed between the positive electrode and the negative electrode, a spacer disposed between the separator and at least one of the positive electrode and the negative electrode, and a non-aqueous electrolyte having lithium ion conductivity. In the negative electrode, the lithium metal deposits during charging, and the lithium metal dissolves during discharging. In a region where the negative electrode and the positive electrode face each other, a first region (R1) facing the spacer and a second region (R2) not facing the spacer are included. The spacer is nonporous or porous, and the spacer has a height (t) of 20 .Math.m or more. When the spacer is porous, the spacer has a porosity Psp, the porosity Psp of the spacer being equal to or less than a porosity Pse the separator.

A lithium secondary battery includes a positive electrode, a negative electrode, and a porous separator disposed between the positive electrode and the negative electrode, a spacer disposed between the separator and at least one of the positive electrode and the negative electrode, and a non-aqueous electrolyte having lithium ion conductivity. In the negative electrode, the lithium metal deposits during charging, and the lithium metal dissolves during discharging. In a region where the negative electrode and the positive electrode face each other, a first region (R1) facing the spacer and a second region (R2) not facing the spacer are included. The spacer is nonporous or porous, and the spacer has a height (t) of 20 .Math.m or more. When the spacer is porous, the spacer has a porosity Psp, the porosity Psp of the spacer being equal to or less than a porosity Pse the separator.

A secondary battery includes a battery case housing a flat electrode body and a sealing plate. The electrode body is housed in the battery case such that a winding axis thereof is parallel with a longitudinal direction of the sealing plate. At an end portion of the electrode body in a winding axis direction thereof, an edge of a positive or negative electrode plate is connected to an external terminal fixed to the sealing plate through a current collector. An insulating pressing member is arranged between the sealing plate and the electrode body. The pressing member presses the electrode body in a direction perpendicular to the winding axis such that a distance between a portion of the electrode body contacting the pressing member and the sealing plate is longer than a distance between the end portion of the electrode body in the winding axis direction thereof and the sealing plate.

A secondary battery includes a battery case housing a flat electrode body and a sealing plate. The electrode body is housed in the battery case such that a winding axis thereof is parallel with a longitudinal direction of the sealing plate. At an end portion of the electrode body in a winding axis direction thereof, an edge of a positive or negative electrode plate is connected to an external terminal fixed to the sealing plate through a current collector. An insulating pressing member is arranged between the sealing plate and the electrode body. The pressing member presses the electrode body in a direction perpendicular to the winding axis such that a distance between a portion of the electrode body contacting the pressing member and the sealing plate is longer than a distance between the end portion of the electrode body in the winding axis direction thereof and the sealing plate.

A cap assembly for a battery, comprising: a connector, the connector comprising a central part, a peripheral part, and a transition part between the former two parts, wherein a current interrupt device is disposed on the central part; a pressure relief piece and electrically connected to the connector via the current interrupt device; and an internal insulating washer, wherein an insulating coating is applied to the peripheral part and transition part of the connector. The insulating coating can prevent reconnection of the connector to the pressure relief piece in the case of an external short circuit and improve the short circuit safety of the battery. The present disclosure further includes a method for making a connector for the cap assembly and to a battery comprising the cap assembly.

A cap assembly for a battery, comprising: a connector, the connector comprising a central part, a peripheral part, and a transition part between the former two parts, wherein a current interrupt device is disposed on the central part; a pressure relief piece and electrically connected to the connector via the current interrupt device; and an internal insulating washer, wherein an insulating coating is applied to the peripheral part and transition part of the connector. The insulating coating can prevent reconnection of the connector to the pressure relief piece in the case of an external short circuit and improve the short circuit safety of the battery. The present disclosure further includes a method for making a connector for the cap assembly and to a battery comprising the cap assembly.

A rechargeable battery according to an exemplary embodiment of the present invention includes: an electrode assembly; a casing which accommodates the electrode assembly and has an opening; a cap assembly which is coupled through the opening and seals the casing; a spacer which is positioned between the electrode assembly and the casing and has multiple holes; and a vent member which is formed on a bottom surface of the casing which is positioned opposite to the opening.