Abstract: An electrochemical apparatus and an electronic apparatus are disclosed. The electrochemical apparatus includes an electrode plate and a tab, where the electrode plate includes a current collector, a first active material layer, and a first insulation layer. The current collector includes a first region, a second region, and a first portion of a third region, where the first region is provided with the first active material layer, and the second region is provided with the first insulation layer. Along a thickness direction of the current collector, an orthographic projection of the second region at least partially surrounds an orthographic projection of the first portion of the third region. In this way, the electrode plate has a small exposed conductive region. This can reduce the safety risk such as a short circuit risk caused during a needle penetration operation on the electrochemical apparatus.

Abstract: A battery cell, including an electrode assembly. The electrode assembly is formed by stacking in sequence or winding a first electrode plate, a separator, and a second electrode plate. The first electrode plate includes a first current collector and a first active material layer disposed on two sides of the first current collector. The first electrode plate further includes a conductive layer. The first current collector includes a first surface and a second surface facing away from the first surface. The conductive layer completely covers the first surface and/or the second surface. The first active material layer is disposed on a surface of the conductive layer. This application further provides a battery containing the battery cell and an electronic apparatus with such battery.

Abstract: The present application discloses a battery, an electronic device and a battery pack. The battery according to one embodiment comprises a battery cell assembly, the battery cell assembly including a first tab and a protection assembly. The protection assembly is connected to the first tab, and comprises a breaker and a first unidirectional conduction element, the breaker and the first unidirectional conduction element are connected in parallel. The battery, the electronic device and the battery pack provided by the embodiments of the present application may achieve overcharge protection on a soft package battery, and may meet a performance requirement of the soft package battery for discharge at large current.

Abstract: The present disclosure relates to a technical field of cells, and discloses a protection device and a battery. The protection device includes: a first connecting member; a second connecting member; a first element; and an elastic sheet. When the elastic sheet has a temperature lower than a first temperature, the elastic sheet is connected to at least one of the first connecting member and the second connecting member; when the temperature of the elastic sheet is equal to the first temperature, the elastic sheet is deformed to allow the first connecting member, the second connecting member, the elastic sheet and the first element to form a series circuit. When the protection device is not triggered, the temperature of the elastic sheet is lower than the first temperature, and the elastic sheet is connected to at least one of the first connecting member and the second connecting member.

Abstract: The present invention discloses a cell and a battery, wherein the cell comprises a body including a first electrode tab; and a choke that triggers after the temperature reaches a certain value to reduce the current passing through it; the choke is electrically connected to the first electrode tab, and a product of the length of connection path from the choke to the first electrode tab and a cooling coefficient of the connection path is smaller than a difference between a first temperature of the first electrode tab and a second temperature of the choke, wherein the second temperature of the choke is a temperature when the choke is triggered. In the above-mentioned cell, if the trigger action of the choke is timely, the body of the cell can be prevented from reaching the overcharge state, and the choke in the above-mentioned cell can further effectively protect the cell.

Abstract: The present application discloses a battery, an electronic device and a battery pack. The battery according to one embodiment comprises a battery cell assembly, the battery cell assembly including a first tab and a protection assembly. The protection assembly is connected to the first tab, and comprises a breaker and a first unidirectional conduction element, the breaker and the first unidirectional conduction element are connected in parallel. The battery, the electronic device and the battery pack provided by the embodiments of the present application may achieve overcharge protection on a soft package battery, and may meet a performance requirement of the soft package battery for discharge at large current.

Abstract: The present disclosure relates to a technical field of cells, and discloses a protection device and a battery. The protection device includes: a first connecting member; a second connecting member; a first element; and an elastic sheet. When the elastic sheet has a temperature lower than a first temperature, the elastic sheet is connected to at least one of the first connecting member and the second connecting member; when the temperature of the elastic sheet is equal to the first temperature, the elastic sheet is deformed to allow the first connecting member, the second connecting member, the elastic sheet and the first element to form a series circuit. When the protection device is not triggered, the temperature of the elastic sheet is lower than the first temperature, and the elastic sheet is connected to at least one of the first connecting member and the second connecting member.

Abstract: The present application relates to the field of battery, discloses an electrode-assembly and a battery, wherein the electrode-assembly includes a body with a first wall and a current blocker arranged on the first wall. The first wall of the body is close to the internal structure of the body, and its temperature is relatively close to the internal temperature of the body as compared with the seal side of the electrode-assembly; in above electrode-assembly, since the current blocker is directly attached to the first wall of the body, the heat inside the body can be quickly conducted to the current blocker through the first wall, so the current blocker of the electrode-assembly can be triggered more timely to reduce or cut off the current for effectively protecting the electrode-assembly.

Abstract: The present invention discloses a cell and a battery, wherein the cell comprises a body including a first electrode tab; and a choke that triggers after the temperature reaches a certain value to reduce the current passing through it; the choke is electrically connected to the first electrode tab, and a product of the length of connection path from the choke to the first electrode tab and a cooling coefficient of the connection path is smaller than a difference between a first temperature of the first electrode tab and a second temperature of the choke, wherein the second temperature of the choke is a temperature when the choke is triggered. In the above-mentioned cell, if the trigger action of the choke is timely, the body of the cell can be prevented from reaching the overcharge state, and the choke in the above-mentioned cell can further effectively protect the cell.