EVE Power

A core pack assembly, a battery, a battery pack, and a vehicle are provided. The core pack assembly includes a core pack and one or more wicking components. The core pack is provided with tabs, and each wicking component is arranged on an outer surface of the core pack and located on a same side of the core pack as the tabs, and is configured to absorb electrolyte outside the core pack and transfer the electrolyte into the core pack.

The present disclosure provides a lithium-ion battery and an electrical device. The lithium-ion battery includes a positive electrode sheet and an electrolyte. Active material in the positive electrode sheet includes a lithium phosphate positive electrode material and a lithium cobalt nickel manganese oxide. The electrolyte includes a positive electrode film forming agent, a negative electrode film forming agent, and a lithium salt. The lithium salt includes lithium hexafluorophosphate and lithium bisfluorosulfonylimide. The lithium-ion battery satisfies a formula as follows: 0.1≤NL×SaltAdd≤0.59, wherein NL is a mass ratio of the lithium cobalt nickel manganese oxide to the lithium phosphate positive electrode material, S_alt is a value of a sum of molar concentrations of the lithium hexafluorophosphate and the lithium bisfluorosulfonylimide in the electrolyte in mol/L, and A_dd is a mass ratio of the positive electrode film forming agent to the negative electrode film forming agent.

The present application provides a cover plate assembly, a battery cell, and a battery. The cover plate assembly includes a cover plate and a pole. The cover plate is provided with a mounting hole, and the cover plate includes a width dimension W and a length dimension L. The pole includes a main body, an end of the main body is provided with a tab connecting groove, and the main body is provided penetrating through the mounting hole. The main body includes a width dimension b' along a direction of the width dimension W, and the main body includes a length dimension a' along a direction of the length dimension L. W - 6 mm ≤ b' ≤ W - 8 mm, and 0.4 ≤ b'/ a' ≤ 0.9.

A heat spreader includes a first plate, a second plate and a plurality of protrusions. The first plate is configured to fit against at least one side surface of a cell. The second plate is hermetically connected to the first plate to form an enclosed space filled with a liquid medium. The protrusions are disposed between the first plate and the second plate and dispersedly arranged in the enclosed space. Some of the protrusions are arranged at intervals in a first direction to form a protrusion group, and two parts of the protrusions respectively belonging to two adjacent protrusion groups are at least partially staggered in a second direction different from the first direction.

The present application provides an adapter piece structure, a battery cell structure and an assembly process therefor, as well as a battery for large-scale energy storage. The adapter piece structure includes a tab connecting portion and a terminal connecting portion, the tab connecting portion is configured to connect with a tab of a battery cell, and the terminal connecting portion is connected with the tab connecting portion. The terminal connecting portion has a first side, the first side has a clean area provided to be cleaned, and the clean area includes a welding area and an annular area arranged around a circumference of the welding area. The welding area is configured for welding the terminal connecting portion with a terminal of a cover plate.

The present disclosure discloses a cover plate assembly and a battery, the cover plate assembly includes a cover plate body, a monitoring device, a conductive member and a fixing member, the monitoring device is installed on one side of the cover plate body, the monitoring device is located between a first terminal post and a second terminal post on the cover plate body; the conductive member connects the monitoring device, the first terminal post and the second terminal post; the conductive member is located between the cover plate body and the fixing member, and the fixing member is used to fix the conductive member. The present disclosure does not need to set up a separate power supply to power the monitoring device, thereby reducing the number of components.

The present application provides a pin component and a battery cell. The pin component includes a tab connection section, a transition section, and a pole connection section. The transition section is connected to the tab connection section in a bending manner, and a first included angle is formed between the transition section and the tab connection section. The pole connection section and the transition section are connected in a bending manner, and a part of the pole connection section overlaps with the transition section.

A positive electrode active material, a positive electrode slurry, a positive electrode sheet, a battery and a vehicle are provided herein, belonging to a field of battery technology. The positive electrode active material includes lithium manganese iron phosphate and lithium nickel cobalt manganese oxide; where a mass ratio of lithium manganese iron phosphate to lithium nickel cobalt manganese oxide is (50-95): (5-50); a general chemical formula of lithium nickel cobalt manganese oxide is: LiNi<a>Co<b>Mn<(1-a-b)>O<2>, 0.6≤a<1, 0<b<0.5, 0<a+b<1.

The present application provides a cover plate assembly and a battery. The cover plate assembly includes a cover body, an insulating support part, and a supporting member. The cover body is provided with an explosion-proof valve. The insulating support part is arranged opposite to the cover body and is in contact with the cover body, and the insulating support part is provided with an air-exhausting port corresponding to the explosion-proof valve. The supporting member is installed on the insulating support part, and the supporting member is located between the cover body and a core package. A melting temperature of the supporting member is higher than a melting temperature of the insulating support part.

The present application provides an electrolyte, a preparation method therefor, a lithium battery, and an electric device. The electrolyte includes a lithium salt, a solvent, and a film-forming additive, where the solvent includes a low-viscosity solvent having a viscosity of 0.50 mPa·s or less, and the electrolyte meets 0.35≤100∗PD∗AddW≤1.30, where based on the mass of the solvent being 100%, W is the mass fraction of the low-viscosity solvent in the solvent, in units of wt%, and A_dd is the ratio of the mass of the film-forming additive in the electrolyte to the total mass of the lithium salt and the solvent. For positive electrode sheets with different compaction densities, the contents of the low-viscosity solvent and the film-forming additive in the corresponding electrolyte can be determined through calculation, thereby obtaining a matched electrolyte. After a lithium battery is prepared using the positive electrode sheet and the matched electrolyte, the electrolyte exhibits good wettability on the positive electrode sheet, and the lithium battery also demonstrates excellent cycling stability.