EVE Power Patente

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 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.

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.

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 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.

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 a positive electrode material, a method for preparing the same, a positive electrode plate, and a battery. The positive electrode material includes a positive electrode active material, which includes a ternary single-crystal material and lithium manganese iron phosphate. The crystal of the ternary single-crystal material has a lattice spacing satisfying the equation of a₁=b₁, where the lattice spacing a₁ ranges from 2.7 Å to 3.0 Å, and the lattice spacing c₁ ranges from 13.5 Å to 15.0 Å. The crystal of lithium manganese iron phosphate has a lattice spacing satisfying the equation of a₂=b₂, where the lattice spacing a₂ ranges from 6.1 Å to 6.4 Å, and the lattice spacing c₂ ranges from 4.6 Å to 5.0 Å.

A pole, a cover assembly, and a cell are provided, which relates to the field of cell technologies. The pole includes a body having a first surface, and the first surface defines a tab welding groove; The tab welding groove includes at least one groove sidewall, the groove sidewall is configured to be in contact with the tab of the cell, and a plane where the groove sidewall is located is gradually inclined toward an axis of the pole in a direction away from the first surface.

The present application provides a pole, a terminal assembly, and a battery cell. The pole includes: a base (1) including a first surface (11); and a cylindrical body (2) disposed on the first surface (11). The cylindrical body (2) includes a second surface (23) away from the base (1), the second surface (23) is provided with a heat conduction groove (3), and the heat conduction groove (3) is filled with a heat conduction material (4).

A positive electrode active material, a positive electrode slurry, a positive electrode sheet and a battery are provided herein. The positive electrode active material includes lithium manganese iron phosphate and lithium-rich lithium ferrite; where a mass ratio of the lithium-rich lithium ferrite added in the positive electrode active material is 0.5%-5%; a particle size D50 of the lithium manganese iron phosphate is d<1>, the particle size D50 of the lithium-rich lithium ferrite is d<2>, and 0.05 ≤ d<1>/d<2> ≤ 0.32.

The present disclosure provides a conductive structure (10) for a battery cell, a cover plate assembly (100), and a battery cell (1000). The conductive structure (10) includes: a first-metal post (1) including a first end (11) and a second end (12) opposite to each other; and a second-metal layer (2) bonded to a surface of the first-metal post (1). The second-metal layer (2) wraps the first end (11) and extends toward the second end (12). The second-metal layer (2) is used to be connected to a tab (1210). In an axial direction of the first-metal post (1), a distance from an end portion (20) of the second-metal layer (2) to an end surface of the second end (12) is H1, a thickness D2 of the first-metal post (1), and a ratio of H1 to D2 ranges from 0 to 0.8.

The present application provides a cover plate and a battery, where the cover plate is applied to batteries. The cover plate includes a plurality of ribs, each rib extends outward from the center of the cover plate along a radial direction of the cover plate, and the plurality of ribs are distributed along a circumferential direction of the cover plate. The cover plate is further provided with a plurality of score grooves, each score groove is provided between two adjacent ribs, and the score grooves are configured to rupture when the internal pressure of the battery exceeds a preset value.

A pole (11), a pole component (10), and a battery are provided. The pole (11) includes a first pole portion (111) and a second pole portion (112). An outer periphery of the first pole portion (111) is convexly provided with a first flange (1114). An end of the second pole portion (112) is provided with a mating groove (1121), and the first end (1111) is provided in the mating groove (1121) and engages with the second pole portion (112). An outer periphery of the second pole portion (112) is convexly provided with a second flange (1125), the second flange (1125) is provided with a first connecting groove (1126), and the first flange (1114) is at least partially located in the first connecting groove (1126) and engages with the second flange (1125). The pole improves a bonding force between the first pole portion and the second pole portion.

The present disclosure provides a conductive module (10a), a cover plate assembly (100), and a battery cell (1000). The conductive module (10a) includes a pole (101) and a terminal pressing block (102). The pole (101) includes a first-metal post (1) and a second-metal layer (2) bonded on a surface of the first-metal post (1). The second-metal layer (2) includes a clamping portion (2a). The terminal pressing block (102) is connected to the pole (101). The clamping portion (2a) is clamped between the first-metal post (1) and the terminal pressing block (102), thereby reducing a risk that the second-metal layer (2) is separated from the first-metal post (1).

The present application provides a positive electrode plate, a method for preparing the same, and a battery. The positive electrode plate includes a positive current collector, a first positive electrode active coating layer, and a second positive electrode active coating layer. In the first positive electrode active coating layer, a mass ratio of a first lithium manganese iron phosphate active material to a nickel-cobalt-manganese ternary active material is (80-90):(8-15). The second positive electrode active coating layer includes a second lithium manganese iron phosphate active material. An areal density ρ₁ of the first positive electrode active coating layer and an areal density ρ₂ of the second positive electrode active coating layer satisfy: ρ₁ ≥ 240 g/m², ρ₂ ≥ 240 g/m², and |ρ1 - ρ2| ≤ 5 g/m².

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The present application provides an electrode tab structure and a welding tooling. The electrode tab structure includes multiple electrode tab units stacked and pre-welded together, and the electrode tab structure includes a first end face and a second end face arranged opposite to each other. The first end face of the electrode tab structure is configured to be abutted against a welding head, and the second end face of the electrode tab structure is configured to be abutted against a welding platform. A difference between a highest point and a lowest point of a metallographic section of the first end face in a first direction being H1, a difference between a highest point and a lowest point of a metallographic section of the second end face in the first direction being H2, and H1 ≤ H2.

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Disclosed are an electrode assembly, a battery, a battery pack, and a method of designing an electrode assembly. The electrode assembly includes an electrode plate structure and at least one tab structure. The tab structure includes a plurality of tabs, and the plurality of tabs are disposed on one side of the electrode plate structure and are connected to the electrode plate structure; where at least two adjacent tabs have different sizes.

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A battery shell, a single battery cell, and a battery pack are provided. The battery shell includes: a battery shell body, wherein the battery shell body is provided with an opening; and a top cover body, wherein the top cover body is covered on the battery shell body at the opening, an end surface, facing the top cover body, of the battery shell body is defined as an upper end surface, and the upper end surface is divided into a first area and a second area located at an outer side of the first area towards an edge; the top cover body is assembled on the first area of the battery shell body, and a welding gap is formed between the second area of the battery shell body and an outer edge of the top cover body.

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