Provided are: a highly reliable secondary battery electrode plate; and a secondary battery using same. The electrode plate is a positive electrode plate for a secondary battery, the positive electrode plate having a metallic positive electrode core body and a positive electrode active material layer formed on both surfaces of the positive electrode core body, wherein the positive electrode plate has a first edge and a positive electrode tab protruding from the first edge, and a fluorine-containing coating is formed on the end surface of the positive electrode core body at the first edge of the positive electrode plate. The secondary battery has the positive electrode plate and a negative electrode plate.

The present invention provides a battery module, including a plurality of battery cells, a plurality of conductive sheets, and at least one plastic protective layer, wherein each conductive sheet is connected in series or in parallel with a plurality of battery cells. The plastic protective layer is formed on the partial surface of the conductive sheet by injection molding to prevent the electrolyte leaked from the defective battery cell from contacting the conductive sheet, causing rise in temperature of the battery cell and causes melt or explosion of the battery cell, which is helpful to improve the safety of the battery module.

A wound battery includes an electrode assembly in which a first electrode and a second electrode are wound together via a separator, the electrode assembly being accommodated in a battery case including a bottomed tube-shaped metallic can. The first electrode has a first uncoated region defined by an exposed portion of a first current collector sheet at an end of the first current collector sheet in the axial direction of winding. The first electrode includes a first current collector lead connected to the first uncoated region. The first uncoated region is disposed on the same side as the open end of the metallic can. The second electrode includes a second current collector lead connected thereto. The first and the second current collector leads extend toward the open end of the metallic can. At least a portion of the first uncoated region is covered with an insulating layer, and the insulating layer extends beyond an end face of the first uncoated region.

Embodiments of the present application relate to a battery module, a battery pack, a device and a failure processing method. The battery module includes: a plurality of battery units for series connection, where after the battery module fails, the plurality of battery units include a failed battery unit and at least one unfailed battery unit adjacent to the failed battery unit; a connecting sheet, used to connect the plurality of battery units in series, where the connecting sheet is provided with at least one breakage guide portion for guiding the connecting sheet to break and form a first part and a second part which are arranged separately, where the first part is used to be connected to the at least one unfailed battery unit and the second part is used to be connected to the failed battery unit; and an electroconductive part, used to be connected to the first part.

Embodiments of the present application relate to a battery module, a battery pack, a device and a failure processing method. The battery module includes: a plurality of battery units for series connection, where after the battery module fails, the plurality of battery units include a failed battery unit and at least one unfailed battery unit adjacent to the failed battery unit; a connecting sheet, used to connect the plurality of battery units in series, where the connecting sheet is provided with at least one breakage guide portion for guiding the connecting sheet to break and form a first part and a second part which are arranged separately, where the first part is used to be connected to the at least one unfailed battery unit and the second part is used to be connected to the failed battery unit; and an electroconductive part, used to be connected to the first part.

A battery terminal includes a terminal main body and a protector, wherein the terminal main body includes clamping sections for clamping the battery post, opposed sections and an operating section, the opposed sections being continuous with the clamping sections, wherein the operating section causes the opposed sections to approach each other, wherein the protector includes an elastic section provided with a contact section to be brought into contact with the upper surface of the battery main body, and a displacement section provided so as to be freely displaced between an introduction position and a retracted position, wherein in the introduction position, a tightening operation by the operating section is limited, and wherein the displacement section is displaced from the introduction position to the retracted position by pressing the contact section against the upper surface of the battery main body so that the tightening operation is allowed.

A battery terminal includes a terminal main body and a protector, wherein the terminal main body includes clamping sections for clamping the battery post, opposed sections and an operating section, the opposed sections being continuous with the clamping sections, wherein the operating section causes the opposed sections to approach each other, wherein the protector includes an elastic section provided with a contact section to be brought into contact with the upper surface of the battery main body, and a displacement section provided so as to be freely displaced between an introduction position and a retracted position, wherein in the introduction position, a tightening operation by the operating section is limited, and wherein the displacement section is displaced from the introduction position to the retracted position by pressing the contact section against the upper surface of the battery main body so that the tightening operation is allowed.

A battery terminal includes a terminal main body and a protector to be mounted to the terminal main body, wherein the terminal main body includes an operating section for clamping and tightening the battery post, and the protector includes a movable section provided with a contact section to be brought into contact with the upper surface of the battery main body, and a displacement section to be freely displaced between a covering position for covering the operating section and a retracted position with an external force applied on the contact section, wherein in the retracted position, the displacement section is retracted from the covering position, and wherein the displacement section is displaced to the retracted position by pressing the contact section against the upper surface of the battery main body so that the access to the operating section is allowed.

An embodiment of the present invention provides a secondary battery wherein, by positively charging a case by a high-resistance positive electrode charging member, an alloy (for example, a lithium aluminum (LiAl) alloy) is not formed on the inner surface of the case by an electrolyte (that is, the case is not corroded), and when a negative electrode terminal is short-circuited to a positive electrode case; a short-circuit current is limited. As an example, the secondary battery according to an embodiment of the present invention comprises: an electrode assembly; a case in which the electrode assembly is accommodated; a cap plate which is coupled to the case and seals the electrode assembly; a terminal which is connected to the electrode assembly and exposed through the cap plate; and a charging member which is interposed between the cap plate and the terminal, wherein the charging member may comprise a conductive member interposed between the cap plate and the terminal, and an insulating member interposed between the conductive member, the cap plate, and the terminal.

An embodiment of the present invention provides a secondary battery wherein, by positively charging a case by a high-resistance positive electrode charging member, an alloy (for example, a lithium aluminum (LiAl) alloy) is not formed on the inner surface of the case by an electrolyte (that is, the case is not corroded), and when a negative electrode terminal is short-circuited to a positive electrode case; a short-circuit current is limited. As an example, the secondary battery according to an embodiment of the present invention comprises: an electrode assembly; a case in which the electrode assembly is accommodated; a cap plate which is coupled to the case and seals the electrode assembly; a terminal which is connected to the electrode assembly and exposed through the cap plate; and a charging member which is interposed between the cap plate and the terminal, wherein the charging member may comprise a conductive member interposed between the cap plate and the terminal, and an insulating member interposed between the conductive member, the cap plate, and the terminal.