AESC Patente

Disclosed are an electrolyte and a bipolar battery including the same. The electrolyte includes a first component, the first component being a compound shown by Formula I below, wherein R₁ and R₂ are each independently selected from any one of an alkyl group having 1-3 carbon atoms, an alkenyl group having 2-3 carbon atoms, and a substituent having 1-3 heteroatoms; the heteroatoms are nitrogen atoms and/or sulfur atoms. When the electrolyte containing the compound shown by Formula I of the present disclosure is applied in the bipolar battery, the bipolar battery exhibits a good high-temperature storage performance and a good high-temperature cycling performance.

Disclosed are a sulfide solid electrolyte and a preparation method and an application thereof. The sulfide solid electrolyte has a molecular formula of Li<a>P<1-b>M<b>S<c>O<d>X<e>; wherein: 5<a<6; 0<b<1; 1.5<c<5, 0<d<2.5, 4<c+d<5, 1<e<2; M is selected from one or more of Al, Ga, In, Ti, Sc, As, Sb, Bi, V or Nb; X is selected from one or more of Cl, Br or I. Through the sulfide solid electrolyte and the preparation method and the application thereof provided by the present disclosure, it is possible to enhance the air stability and chemical stability of the sulfide solid electrolyte, increase the conductivity of the sulfide solid electrolyte, improve the air stability, and ameliorate the electrolyte/active material interface properties, thereby improving the compatibility with active materials, reducing packaging steps and the use of packaging materials, and thus significantly improving the capacity, number of cycles and energy density of lithium-ion batteries.

A secondary battery (1), a battery assembly (100), and an electronic device (1000) are provided. The secondary battery (1) includes: a housing (10) and an electrode assembly (20) accommodated in the housing (10). The electrode assembly (20) includes a wound structure (201) formed by a positive electrode sheet (21), a separator (22), and a negative electrode sheet (23). A positive electrode current collector (211) of the positive electrode sheet (21) includes a positive electrode coated region (212) and a positive electrode uncoated region (213). A negative electrode current collector (231) of the negative electrode sheet (23) includes a negative electrode coated region (232) and a negative electrode uncoated region (233). A part of the positive electrode uncoated region (213) is bent to form a stacked positive electrode tab region (2131). A part of the negative electrode uncoated region (233) is bent to form a stacked negative electrode tab region (2331).

A secondary battery (100), a battery pack (200), and an electronic device (300) are provided. The secondary battery (100) includes a casing (110), an electrode assembly (120), a current-collecting member (130), and a sealing plate (160). The casing (110) includes a side wall (111) and a cover plate assembly (140). The side wall (111) includes an opening (112) sealed by the cover plate assembly (140). The electrode assembly (120) mounted in the casing (110) has a winding cell through hole (121). The current-collecting member (130) is electrically connected to the electrode assembly (120) and the casing (110). The sealing plate (160) is arranged on a side of the cover plate assembly (140) away from the electrode assembly (120). The cover plate assembly (140) is provided with a liquid injection hole (170). The sealing plate (160) seals the liquid injection hole (170).

Disclosed are a positive electrode and a preparation method thereof and a battery. The positive electrode includes a current collector, an active material layer, and a conductive layer disposed between the current collector and the active material layer. The conductive layer includes an MXene material. Adding the MXene material in the conductive layer may elevate the conductive performance and stability of the battery, and may also strengthen the adhesion between the current collector and the active material layer, enhance the peel force of the positive electrode, and improve the long-term cycle stability of the battery. In addition, since the addition of the MXene material enhances the adhesion between the current collector and the active material layer, under the condition that the peel strength of the electrode sheet is ensured, the content of binder in the active material layer may be reduced.

Disclosed are an electrolyte coating, a solid-state battery and an electrical device. The electrolyte coating is coated on the surface of a solid-state electrolyte. The solid-state electrolyte includes one or both of a sulfide electrolyte and a halide electrolyte, wherein the electrolyte coating is a copolymer of tridecafluorooctyl methacrylate and n-butyl methacrylate. By coating the electrolyte coating on the surface of the sulfide electrolyte and the halide electrolyte, the present disclosure significantly increases the stability thereof in the air (even with high humidity) on the premise of not substantially affecting the conductivity thereof.

A secondary battery (100), a battery pack (200) and an electronic device (300) are provided. The secondary battery (100) includes: a housing (110) and an electrode assembly (120). The housing (110) includes a side wall (111) with an opening (112) at one end and a cover plate assembly (140). The cover plate assembly (140) seals the opening (112). The electrode assembly (120) is disposed within the housing (110). The cover plate assembly (140) includes: a first cover plate (141) and a second cover plate (142). The first cover plate (141) covers the opening (112) and is connected with the side wall (111) in a sealed manner. The first cover plate (141) includes a through hole (1411). The second cover plate (142) at least partially blocks the through hole (1411). The second cover plate (142) is connected with the first cover plate (141).

Disclosed is a battery pack, including: multiple cells (210); a casing (100), wherein the inner bottom surface (10) of the casing (100) has a stepped surface for dividing the inner bottom surface (10) of the casing (100) into at least two placement areas (11) having a height difference in the height direction of the casing (100), and the cells (210) are placed in each of the placement areas (11). With stepped surfaces disposed on the inner bottom surface (10) of the casing (100), the battery pack may form at least two placement areas (11) with height differences within the casing (100), making it possible to provide a force to the adhesive located in the placement area with a higher height, helping the adhesive flow toward the placement area with lower height.

The disclosure provides a cylindrical battery (100), a pack (1002), and an electronic device (1000). The cylindrical battery (100) includes a housing (200) having an opening (205) at one end in a height direction (Hd) of the cylindrical battery (100); an electrode assembly (120) located in the housing (200) and having a winding center hole (120c); a cover plate (220) covering the opening of the housing (200) and having an explosion-proof valve region (222) formed by being surrounded by explosion-proof valves (350). The winding center hole (120c) is located within a range of an orthogonal projection of the explosion-proof valve region (222) of the cover plate (220) in the height direction (Hd). The winding center hole (120c) has a diameter D1, a partial region of the cover plate (220) has a diameter D2, and 35%≥D1/D2≥10%.

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