A lithium ion battery and an electric vehicle with the same are provided. The lithium ion battery includes a cover plate assembly and a battery cell assembly, the cover plate assembly includes a pole and a polarity connecting piece, the pole is connected with the polarity connecting piece, the battery cell assembly is provided with a battery cell tab assembly, and the pole is connected and conducted with the battery cell tab assembly through the polarity connecting piece. As a hard connection, the polarity connecting piece is directly or indirectly connected with the battery cell tab assembly. The polarity connecting piece is in interference fit with the pole for laser welding, so that the connection reliability is high, the overcurrent capability is strong, and electronic conduction is easy.

A battery according to the present disclosure includes: a power generating element including a first electrode, a second electrode, and an electrolyte layer between the first electrode and the second electrode; and a first extraction electrode. The first electrode includes a first current collector and a first active material layer between the first current collector and the electrolyte layer. The first extraction electrode includes: a first conductive member connected to a first surface of the first current collector, the first surface being opposite to the first active material layer; and a first lead connected to the first conductive member.

A battery according to the present disclosure includes: a power generating element including a first electrode, a second electrode, and an electrolyte layer between the first electrode and the second electrode; and a first extraction electrode. The first electrode includes a first current collector and a first active material layer between the first current collector and the electrolyte layer. The first extraction electrode includes: a first conductive member connected to a first surface of the first current collector, the first surface being opposite to the first active material layer; and a first lead connected to the first conductive member.

This application provides a battery cell, a battery, and an electric apparatus. The battery cell includes: an electrode assembly, including a body portion and a first tab. A first size L1 of the body portion in a length direction thereof is greater than a second size L2 of the body portion in a width direction thereof. The first tab is located on at least one end of the body portion in the width direction. The first tab has a third size L3 in the length direction. The first size L1, the second size L2, and the third size L3 satisfy 0.5L2≤L3≤L1. The battery cell according to an embodiment of this application is intended to resolve a technical problem of severe heat generation by a tab.

A battery is provided in which a reliability of the caulked part vicinity of the terminal is suitably enhanced. One suitable embodiment of the battery herein disclosed includes a negative electrode electrical collector part includes a penetration hole into which the negative electrode terminal is inserted, and the penetration hole includes a taper part including an inclination for making an inner diameter become gradually larger along the insertion direction. Here, the negative electrode terminal is caulked on the taper part in a state of being arranged in the penetration hole, an outer circumference smoothing part including a step difference is formed at the outer circumferential edge on the caulked part, and a join part exists at which the outer circumference smoothing part and the edge part of the penetration hole are joined.

A battery is provided. The battery includes: a housing and a plurality of accommodating cavities provided in the housing. Two adjacent accommodating cavities are separated by a partition plate. An electrode core assembly is arranged in each of the accommodating cavities. A plurality of electrode core assemblies are sequentially arranged along the first direction and connected in series. A spacer is arranged between the end of the electrode core assembly along the first direction and the partition plate.

A battery pack includes a battery unit; a housing including an inner portion and an outer portion, the battery unit being accommodated in the inner portion, the outer portion including a service terminal therein that is electrically connected to the battery unit; a bus bar including a first end and a second end, the first end being in the inner portion of the housing and connected to the battery unit, the second end being in the outer portion of the housing and connected to the service terminal such that at least a portion of the bus bar is buried in the housing; a first sealing portion sealing the battery unit and the first end of the bus bar; and a second sealing portion sealing the service terminal and the second end of the bus bar.

Certain aspects relate to a battery pack for electric vertical take-off and landing aircraft. Exemplary battery pack includes a first pouch cell, a second pouch cell, at least a sensor, where the at least a sensor is configured to sense battery pack data and transmit the battery pack data to a data storage system, and a vent configured to vent the ejecta from the first pouch cell. In some embodiments, battery pack may be configured to power at least a propulsor component.

Certain aspects relate to a battery pack for electric vertical take-off and landing aircraft. Exemplary battery pack includes a first pouch cell, a second pouch cell, at least a sensor, where the at least a sensor is configured to sense battery pack data and transmit the battery pack data to a data storage system, and a vent configured to vent the ejecta from the first pouch cell. In some embodiments, battery pack may be configured to power at least a propulsor component.

An electrode plate which is to be contained in a wound or multilayer electrode body, and which is provided with: a band-like electrode plate core body; mixture layers that are formed on both surfaces of the electrode plate core body; and a tab that extends from one end of the electrode plate core body in the short-side direction. With respect to this electrode plate, the front edge of the electrode plate core body at the end from which the tab extends is covered by the mixture layers.