Becker Kurig & Partner

A liquid heating device (1a) includes: a container (3) having a space inside; a plate-shaped base part (121) including a first portion (121a) in the space, and a second portion (121b) at a periphery of the first portion and exposed outside the container; a heating element (23a) on a first side of the first portion; a terminal (23b1) on the first side of the second portion; a connection part (23b2) on the first side of the first portion and the second portion, and electrically connected to the heating element and the terminal; a protection part (24) on the first side of the first portion and the second portion, covering the heating element and the connection part, and exposing the terminal; and a sealing part (4) between the container and the second portion, and provided at an end portion on an upper side in a gravity direction of the container.

The invention provides a sulfide solid electrolyte and a preparation method and an application thereof. A molecular formula of the sulfide solid electrolyte is Li_aP_1-bM_bS_cO_dX_e; wherein: 5<a<10; 0<b<1, 3<c<6, 0<d<2.5, 4<c+d<6, 0<e<2; M is selected from one or a plurality of Al, Ga, In, Ti, Sc, As, Sb, Bi, V, Nb, Ca, Mg, Sr, Ba, Zn, Cr, Sn, or Pb, and X is selected from one or a plurality of Cl, Br, or I. In an X-ray diffraction pattern obtained by CuKα radiation of a sulfide solid electrolyte powder, no diffraction peaks appear in ranges of 27° to 27.3°, 29° to 29.5°, and 35° to 35.2°. The invention provides a sulfide solid electrolyte and a preparation method and an application thereof that may obtain a high-purity doped sulfide solid electrolyte, suppress the formation of impurity phases, and improve the energy efficiency and cycle performance of the lithium-ion battery.

Disclosed are a separator (100) and an electrochemical device, specifically relating to the battery technology field. The separator (100) includes a porous base film (101), a heat-resistant layer (102) and an adhesive layer (103), wherein the heat-resistant layer (102) is disposed on at least one surface of the porous base film (101). The adhesive layer (103) is at least disposed on a surface of the heat-resistant layer (102) opposite to a surface in contact with the porous base film (101). An effective adhesion degree R-value of the separator (100) on a side where the heat-resistant layer (102) is provided is 40%-80%, and a difference between a maximum value and a minimum value of the effective adhesion degree R-value is <30%; wherein the effective adhesion degree R-value indicates a ratio of an effective adhesion area to a theoretical adhesion area of the separator (100).

Provided are a separator (100) and an electrochemical device. The separator (100) includes a porous base film (101) and a heat resistant layer (102). The heat resistant layer (102) is disposed on at least one surface of the porous base film (101), and includes inorganic particles and an adhesive agent. A surface static friction coefficient of the heat resistant layer (102) is ≤0.8, and a bulk density A of the heat resistant layer (102) satisfies: A=(0.4 to 0.5)×ρ. A heat resistant layer (102) with dense stacking and flat surface is obtained by controlling the static friction coefficient and bulk density of the heat resistant layer (102), which may increase an effective contact area between the adhesive particles in the heat resistant layer (102) and the electrode sheet, thereby increasing the adhesive force between the separator (100) as a whole and the electrode sheet.

An electrode sheet (100) includes a current collector (10) including a current collector body (12) and a tab (14) extending from the current collector body (12) along a first direction (d); an active material layer (20) disposed on at least one side of the current collector (10) in a thickness direction; and a reinforcement rib (30). The tab (14) has a tab bare foil region (40) where the active material layer (20) is not disposed. In the first direction (d), the reinforcement rib (30) continuously extends from the tab bare foil region (40) to a surface of the active material layer (20). The disclosure provides an electrode sheet (100) and a secondary battery (1300) to at least achieve avoiding tab folding.

An electrode sheet (100, 100A, 100B), a secondary battery (500), and an electronic device (1000) are provided. The electrode sheet (100, 100A, 100B) includes: an electrode sheet body (160); and an electrode tab (150, 150') extending from the electrode sheet body (160) in a first direction (D1), where a stiffener (190) is disposed on a surface of the electrode tab (150, 150'), where the stiffener (190) at least includes a first portion (192) and a second portion (194), the first portion (192) and the second portion (194) are connected through a bending part (196). An angle formed by the first portion (192) and the second portion (194) is a, 28°≤a≤45°.

The disclosure provides an electrode sheet (300), including: an electrode sheet body (310), and a tab (320) protruding from the electrode sheet body (310) along a first direction (F), the tab (320) is set with a reinforcing rib array (321), the reinforcing rib array (321) includes multiple first reinforcing ribs (322); wherein in the first direction (F), every two adjoining first reinforcing ribs (322) are separated from each other. The purpose of the disclosure lies in providing an electrode sheet (300), a secondary battery (100A/B) and an electronic device (1000), so as to at least strengthen the supporting force for the tab (320).

Disclosed are a secondary battery (100), a battery pack (1002), and an electronic device (1000). The secondary battery (100) includes: a housing (200), including an end wall (111) and a side wall (109) surrounding the end wall (111), the end wall (111) having an opening portion (111V); an electrode assembly (120), including positive and negative electrode sheets (10, 20) and a separator (122); an electrode terminal (160), passing through the opening portion (111V) and fixed on the end wall (111); and a current collecting plate (202), disposed between the electrode assembly (120) and the end wall (111) and electrically connecting the electrode assembly (120) and the electrode terminal (160). Along a radial direction of the electrode assembly (120), the electrode assembly (120) includes a first region (Ra) and a second region (Rb). A minimum distance between a surface of the current collecting plate (202) facing the electrode assembly (120) and a first end (16u) of a negative electrode active material layer (16) along a first direction (D1) is L_A mm, L_A mm ≥1.5 mm.

An electrode sheet (100), a secondary battery (500), and an electronic device (1000) are provided. The electrode sheet (100) includes: an electrode sheet body (160), including a current collector (110) and an active material layer (130), the current collector (110) has two opposite surfaces, and the two surfaces are respectively coated with active material layers (130); and a tab (150), extending from the electrode sheet body (160), the tab (150) is provided with a second stiffener region (192) and a first stiffener region (191), the second stiffener region (192) is disposed between the first stiffener region (191) and the active material layer (130), a stiffener (190) is disposed in the first stiffener region (191) and the second stiffener region (192), a depth (H1) of the stiffener (190) in the first stiffener region (191) is greater than a depth (H2) of the stiffener (190) in the second stiffener region (192).

Provided is an active dual-frequency liquid crystal transmission and reflection array structure including a first substrate layer (1), a second substrate layer (3), a first liquid crystal layer (2), a first surface unit (111), a second surface unit (121), a third surface unit (311), and a fourth surface unit (321). When the first liquid crystal layer (2) is not applied with a bias voltage, a center operating frequency of the active dual-frequency liquid crystal transmission and reflection array structure lies in a first frequency band. Conversely, when the first liquid crystal layer (2) is applied with a bias voltage, the center operating frequency of the active dual-frequency liquid crystal transmission and reflection array structure lies in a second frequency band. The first frequency band is higher than the second frequency band.