EVE Power Patente

The invention provides a battery and an electrical device. The battery includes a connection member and a package member, where the connection member (2) has an electrode lead-out portion (201) for connecting an electrode of the battery and a tab connection portion (202) for connecting a tab of the battery; and where at least a partial structure of the package portion (3) is provided at the connection between the electrode lead-out portion (201) and the tab connection portion (202) and/or the connection between the electrode lead-out portion (201) and an electrode of the battery. The battery of the invention improves the connection stability of between the tab of the battery and the electrode of the battery.

The present application provides a positive electrode sheet, a battery cell, and an electrical device, which belong to the field of battery technologies. The electrical device includes the battery cell, the battery cell includes the positive electrode sheet, and the positive electrode sheet satisfies the formula: 2.5 ≤ H/PD ≤ 4.5, where H represents the Mohs hardness scale of the positive electrode sheet, and PD represents the compaction density of the positive electrode sheet.

The present application provides a housing assembly, a battery, and an energy storage device. The housing assembly includes a housing body and a cover. The housing body is provided with an accommodating cavity and includes two first end portions arranged oppositely. At least one first end portion is provided with a mounting hole communicated with the accommodating cavity. The cover includes a cover body and an insertion portion, and the insertion portion is inserted into the mounting hole. The inner side wall of the mounting hole includes a first side wall section that is tapered and connected to the first end portion and/or the side wall of the insertion portion includes a second side wall section that is tapered.

The present application provides a current collecting plate, a battery cell, and an electrical device. The current collecting plate includes a current collecting plate body and a foldable member, the current collecting plate body is defined with a through hole, the foldable member is provided at the through hole, the foldable member includes a current collecting portion and a connecting portion, and the connecting portion connects the current collecting portion with the current collecting plate body. A thickness of a part of the connecting portion is less than a thickness of other parts of the connecting portion, and/or a thickness of at least part of the connecting portion is less than a thickness of the current collecting plate body, and/or a thickness of at least part of the connecting portion is less than a thickness of the current collecting portion.

The application discloses a welding method of a battery shell, a battery shell, and a battery cell, belonging to the technical field of battery manufacturing. The battery shell includes a cover plate and a shell. The cover plate includes a body and an overlapping protrusion. The overlapping protrusion is melted and welded to a top of the body by providing a welding laser to run a loop on a top of the overlapping protrusion. The method of top welding can also better realize the welding of the overlapping protrusion and the shell, which not only retains the advantage of high welding speed of the top welding, but also has the advantage of side welding to avoid light leakage into the battery cell.

The present application provides a top cover assembly, a single cell, and a battery pack. The top cover assembly includes a plastic member and a cover plate. The cover plate is provided with a pressure relief port. The plastic member is connected to a side of the cover plate adjacent to the electrode assembly. The plastic member includes a fracture region. The fracture region is provided adjacent to the pressure relief port. The fracture region is configured to be fractured after being subjected to an air pressure inside a cell.

A battery, a battery pack, a housing, and a housing assembly are provided. The battery includes a housing, a cover assembly and a first sealing element. A first opening is formed at one end of the housing, the cover assembly is connected to the housing and seals the first opening, the first sealing element is disposed between the cover assembly and the housing. The first sealing element wraps a side surface of the cover assembly and forms a sealed connection to the cover assembly and the housing, and a gap is formed between the first sealing element and the side surface of the cover assembly.

The present application provides a cover plate, a battery, and an electrical device. The cover plate includes a cover plate body, an explosion-proof structure, and a copper layer. The explosion-proof structure is disposed on the cover plate body, at least one side of the cover plate body is provided with the copper layer, the copper layer covers the explosion-proof structure, and the cover plate body and the copper layer are made of different materials.

This application provides a battery cell, which relates to the technical field of battery cells. The battery cell includes an electrode assembly and a housing, wherein the electrode assembly is arranged in the housing, and an explosion-proof structure is provided on the housing; a valve opening area S of the explosion-proof structure, a valve opening pressure P of the explosion-proof structure, an electrolyte injection amount m of the battery cell, and a capacity C of the battery cell satisfy 2.4 ≤ S×P-C/(m×1000) ≤ 5.4. This application appropriately sets the valve opening area of the explosion-proof structure, valve opening pressure of the of the explosion-proof structure, electrolyte injection amount of the battery cell, and the capacity of the battery cell, so that when the battery cell fails and causes thermal runaway, the explosion-proof structure can work in time, and different parameters, for example the capacity of the battery cell, can be set according to actual conditions, so as to meet the explosion-proof requirements of large-capacity batteries.

The present disclosure provides a lithium-ion battery, including a solvent, a lithium salt and an electrolyte. The electrolyte includes additives. A proportion of the additives in the electrolyte is denoted as A_dd, with a unit of A_dd being parts. A charging cutoff voltage of the lithium-ion battery is denoted as V_ol, with a unit of V_ol being V. A CB value of the lithium-ion battery, the A_dd and the V_ol satisfy 0.98≤CB×VolAdd≤1.54, wherein the CB value of the lithium-ion battery is a dimensionless numerical value. The additives include a negative electrode film-forming additive, a positive electrode complexing additive, and a high-voltage-resistant positive electrode additive.

The present application provides a positive electrode active material, a method for preparing the same, a positive electrode plate, and a battery, which relate to the field of battery technologies. The positive electrode active material includes a ternary material and lithium manganese iron phosphate. A mass of the lithium manganese iron phosphate is represented by A, a total mass of the ternary material and the lithium manganese iron phosphate is represented by B, where A and B satisfy: 0 < A/B < 50%. The lithium manganese iron phosphate has a hollow spherical structure and has a median particle size ranging from 0.5 µm to 3 µm.

The present application provides a conductive adhesive and a preparation method thereof, a negative electrode sheet and a battery, which belongs to a field of battery technology. The conductive adhesive has a structural formula represented by formula (1), where m: n= (1-4): 1.

A negative electrode sheet and a battery are provided in the disclosure. The negative electrode sheet includes a negative electrode current collector and a coating. The coating includes an inner layer and an outer layer. The inner layer is close to a surface of the negative electrode current collector, and the outer layer is away from the surface of the negative electrode current collector. A first negative electrode active material in the inner layer includes a silicon-based negative electrode material, and a second negative electrode active material in the outer layer includes a carbon-based negative electrode material.

The present disclosure provides a core, a battery, and a battery pack. The core includes: an electrode sheet assembly including a plurality of electrode sheets each including a tab; where a plurality of tabs are welded to form a weld imprint area, a height of the tabs after folded is H1, and the height of the weld imprint area is H2; and where the core further has two side surfaces opposite to each other in a thickness direction of the core, a distance between the weld imprint area and one of the side surfaces is D, and a thickness of the core is d; and where 0.42< arctan((H1-H2)/(d-D))/arctan((H1-H2)/D)≤1.

A pin structure includes a terminal connecting part and a tab connecting part. The terminal connecting part has a first section and a second section connected to each other, and the first section has a width less than a width of the second section. The tab connecting part is connected, by bending, to a side of the first section in a width direction of the first section, and is spaced apart from the second section. A smooth transition is formed between opposite respective sides of the tab connecting part and the second section in a direction in which the terminal connecting part extends.

A laminating platform, a laminating machine, and a laminating method are provided. The laminating platform includes a cutting mechanism and a plurality of laminating sub-platforms. Each of the laminating sub-platforms has a bearing surface configured to carry the composite strip A. The plurality of laminating sub-platforms shares a material receiving station; the plurality of laminating sub-platforms are moved in the first direction, so that the plurality of laminating sub-platforms are located at the material receiving station in turn. The cutting mechanism is configured to cut a portion of the composite strip A located between two adjacent laminating sub-platforms.

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 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.

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.

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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