Safe and high-energy USB rechargeable battery

An explosion-proof structure, comprising:

• a metal housing which is a cylindrical structure with a closed end and an open end and for mounting a cell;
• and
• an explosion-proof plug disposed inside the metal housing to divide the metal housing into a first region with the closed end and a second region with the open end, the first region is used for mounting the cell and is sealed by the explosion-proof plug, the second region is used for mounting the protective circuit board and the open end of the second region is sealed by a positive electrode cap,
• wherein the explosion-proof plug comprises an explosion-proof plug body, the explosion-proof plug body has a pressure relief portion having a weaker strength than the explosion-proof plug body, and one end of the pressure relief portion communicates with an interior of the metal housing and another end of the pressure relief portion communicates with an exterior of the metal housing;
• wherein the explosion-proof plug body is provided with a positive pinhole through which a positive electrode of the cell is allowed to pass and a negative pinhole through which a negative electrode of the cell is allowed to pass, and the positive electrode and the negative electrode of the cell are electrically connected to the protective circuit board after passing through the positive pinhole and the negative pinhole respectively;
• wherein the metal housing is provided with a groove at a position at which the explosion-proof plug is disposed, the groove is formed by concaving the metal housing, and the explosion-proof plug is disposed at the groove and abuts against an inner wall of the groove to seal up the cell;
• and
• wherein in the second region, the protective circuit board is vertically inserted into the explosion-proof plug, the protective circuit board and the USB interface are integrally formed, and the positive electrode cap is disposed over the protective circuit board;
• the second region is a pressure relief region which comprises an interior of the positive electrode cap, an interior of the USB interface, and a path between the interior of the positive electrode cap and the interior of the USB interface, so that a pressure inside the rechargeable battery is released to the outside of the rechargeable battery through the interiors and the path.

A cell assembly structure, comprising:

• a positive electrode assembly comprising a positive electrode cap and a protective board support structure;
• a protective circuit board which is provided with a socket and is disposed on the protective board support structure;
• and
• a cell which uses a rigid electrode pin and comprises a positive electrode and a negative electrode;
• and
• a metal housing, wherein the metal housing is a cylindrical structure with a closed end and an open end and is used for mounting the cell,
• an explosion-proof plug disposed inside the metal housing to divide the metal housing into a first region with the closed end and a second region with the open end, the first region is used for mounting the cell and is sealed by the explosion-proof plug, the second region is used for mounting the protective circuit board and the open end of the second region is sealed by a positive electrode cap
• wherein the socket is provided with a socket hole that cooperates with the electrode pin, the electrode pin is in close cooperation with and electrically connected to the socket hole so that the cell is electrically connected to the socket;
• wherein the explosion-proof plug comprises an explosion-proof plug body, the explosion-proof plug body is provided with a positive pinhole through which the positive electrode is allowed to pass and a negative pinhole through which the negative electrode is allowed to pass, and the positive electrode and the negative electrode of the cell are electrically connected to the protective circuit board after passing through the positive pinhole and the negative pinhole respectively;
• wherein the metal housing is provided with a groove at a position at which the explosion-proof plug is disposed, the groove is formed by concaving the metal housing, and the explosion-proof plug is disposed at the groove and abuts against an inner wall of the groove to seal up the cell;
• and
• wherein in the second region, the protective circuit board is vertically inserted into the explosion-proof plug, the protective circuit board and the USB interface are integrally formed, and the positive electrode cap is disposed over the protective circuit board;
• the second region is a pressure relief region which comprises an interior of the positive electrode cap, an interior of the USB interface, and a path between the interior of the positive electrode cap and the interior of the USB interface, so that a pressure inside the rechargeable battery is released to the outside of the rechargeable battery through the interiors and the path.

A cell assembly structure, comprising:

• a positive electrode assembly comprising a positive electrode cap and a protective board support structure,
• a protective circuit board which is disposed on the protective board support structure;
• and
• a cell, wherein the cell comprises a positive electrode and a negative electrode and the cell uses a rigid electrode pin which is electrically connected to the protective circuit board by a plugging procedure;
• and
• a metal housing, wherein the metal housing is a cylindrical structure with a closed end and an open end and is used for mounting the cell;
• an explosion-proof plug disposed inside the metal housing to divide the metal housing into a first region with the closed end and a second region with the open end, the first region is used for mounting the cell and is sealed by the explosion-proof plug, the second region is used for mounting the protective circuit board and the open end of the second region is sealed by a positive electrode cap;
• wherein the explosion-proof plug comprises an explosion-proof plug body, the explosion-proof plug body is provided with a positive pinhole through which the positive electrode is allowed to pass and a negative pinhole through which the negative electrode is allowed to pass, and the positive electrode and the negative electrode of the cell are electrically connected to the protective circuit board after passing through the positive pinhole and the negative pinhole respectively;
• wherein the metal housing is provided with a groove at a position at which the explosion-proof plug is disposed, the groove is formed by concaving the metal housing, and the explosion-proof plug is disposed at the groove and abuts against an inner wall of the groove to seal up the cell;
• and
• wherein in the second region, the protective circuit board is vertically inserted into the explosion-proof plug, the protective circuit board and the USB interface are integrally formed, and the positive electrode cap is disposed over the protective circuit board;
• the second region is a pressure relief region which comprises an interior of the positive electrode cap, an interior of the USB interface, and a path between the interior of the positive electrode cap and the interior of the USB interface, so that a pressure inside the rechargeable battery is released to the outside of the rechargeable battery through the interiors and the path.