18results about How to "Increase internal resistance" patented technology

The invention discloses an electrolyte, a secondary battery and a power utilization device, and belongs to the technical field of batteries, the electrolyte comprises a lithium salt, the molecular structure of the lithium salt contains C3-C20 alkyl ether, a sulfonic acid amine group and a fluorine element, the lithium salt has a large dipole moment and a high donor number, meanwhile, the lithium salt can be combined with Li < + >, and the lithium salt can be combined with Li < + >. A solvation structure is formed, solvent decomposition is inhibited, and the fast charging performance and the cycle performance of the secondary battery are remarkably improved.

The invention relates to the technical field of thermal batteries, in particular to a high-specific-energy long-endurance thermal battery composite positive electrode material and a preparation method and application thereof.The composite positive electrode material is formed by compounding a high-capacity cobalt-based multi-component composite positive electrode material A and a high-conductivity cobalt-based multi-component composite positive electrode material B. Compared with traditional FeS2 and CoS2 positive electrode materials, the composite positive electrode material has the advantages that the specific energy of the composite positive electrode material is greatly improved; the material has the advantages of high pyrolysis temperature, good conductivity and high specific energy, and is suitable for high-specific-energy long-endurance thermal batteries.

The present invention provides a negative electrode active layer, a double negative electrode active layer, a negative electrode plate and a lithium ion battery. The negative electrode active layer includes a carbon-modified lithium metasilicate binder, and the content of the carbon-modified lithium metasilicate binder is 2.4% to 3.2% based on the total weight of the negative electrode active layer as 100%. The negative electrode active layer of a lithium ion battery provided by the present invention, which includes carbon-modified lithium metasilicate, can be used as a binder to construct a cross-linked network in the negative electrode active layer, improve the internal resistance, adhesion, liquid absorption capacity, expansion and ion conductivity of the negative electrode plate, and finally obtain a lithium ion battery that can simultaneously take into account high rate performance, low internal resistance and long cycle.

The present application relates to an electrolyte and an electrochemical device comprising the electrolyte. The electrolyte comprises a dinitrile compound, a trinitrile compound, and propyl propionate, wherein, based on the total weight of the electrolyte, X is a weight percentage of the dinitrile compound and Y is a weight percentage of the trinitrile compound, and Z is a weight percentage of the propyl propionate; 2 wt% < (X+Y) ≤ 8 wt%, 0.1 ≤ (X / Y) ≤ 6, 2 wt% < X ≤ 6 wt%, 30 wt% ≤ Z ≤ 50 wt%, and 0.01 ≤ (Y / Z) ≤ 0.3.

This invention discloses a fluorine-containing cathode material, its preparation method, and its application. The fluorine-containing cathode material includes a bulk material and a fluorine-containing lithium cobalt compound coated on the bulk material. The chemical formula of the fluorine-containing cathode material is Li. 1+x (Ni (1‑c‑d) Co d Mn c ) 1‑b‑e M b M′ e F y O 2‑y In this invention, the fluoride in the fluorinated coating layer reacts with lithium in the bulk material of the fluorinated cathode material to form a fluorinated cobalt lithium compound. Since the conductivity of the fluorinated compound is very low, coating with the fluorinated cobalt lithium compound significantly increases the impedance of the fluorinated cathode material in the battery, increasing the battery's internal resistance and sacrificing battery capacity. By simultaneously coating with the fluorinated coating layer and replenishing lithium, the conductivity of the fluorinated cathode material is significantly improved, thereby achieving the goal of increasing the capacity of the fluorinated cathode material and improving cycle performance.

The present application provides a binder and a preparation method thereof. The binder comprises a copolymer comprising a building block (I) and a building block (II), wherein the building block (I) is formed by copolymerizing a building block (i) and a building block (ii). The binder of the present application is a multifunctional binder with excellent binding, dispersing and thickening properties. An electrode sheet prepared from the binder of the present application has a relatively low electrode sheet resistance. A secondary battery prepared from the binder of the present application also has excellent cycling performance.

The invention relates to a composite particle, a positive pole piece, a battery and electric equipment. The composite particle comprises an inner core, a first coating layer and a second coating layer, wherein the inner core comprises lithium iron phosphate; the periphery of the inner core is coated with the first coating layer, and the first coating layer is a carbon layer; the second coating layer is coated on the periphery of the first coating layer, the second coating layer is a metal oxide layer, and the ionic conductivity of the second coating layer is variable.

The present application relates to a kind of vehicle and its regenerative braking auxiliary control method and system, belong to new energy regenerative braking system and engine exhaust brake technical field.The present application obtains regenerative braking request power and battery allowed recharging power when vehicle braking, when regenerative braking request power is greater than or equal to battery allowed recharging power, engine exhaust brake power and drive motor regenerative braking power are determined according to the difference between regenerative braking request power and battery allowed recharging power, drive motor is controlled according to the determined regenerative braking power to carry out regenerative braking, and exhaust brake valve is closed, by controlling generator to drag engine, so that engine speed reaches the speed value corresponding to the engine exhaust brake power, the method can solve the problem of insufficient regenerative braking caused by the limited battery recharging capacity when vehicle is full or battery low temperature, avoid braking feeling inconsistency and regenerative braking failure when long downhill and other problems.

The invention discloses a halide solid electrolyte with electrochemical activity and a preparation method and application thereof, the solid electrolyte is a zirconium-doped ferric lithium chloride solid electrolyte, the chemical general formula of the solid electrolyte is LiFe1-4x / 3MxCl4, M is a metal element with the valence state higher than + 3, 0 lt; xlt; 1. According to the halide solid-state electrolyte with the electrochemical activity, the ionic conductivity order of magnitude is improved, the room-temperature ionic conductivity is improved to 10 <-3 > S / cm from 10 <-6 > S / cm by three orders of magnitude, so that the material is changed from'unavailability 'to'high performance', and the application requirement of an all-solid-state battery is met.

The present invention relates to a separator comprising: a substrate; an inorganic particle layer formed on at least one surface of the substrate; and an adhesive layer formed on at least one of the inorganic particle layers, in which F40 is 1 nN to 30 nN when an adhesive force between a probe of an atomic force microscope having a spring constant of 40 N / m, an average radius of 8 nm, and a scanning speed of 0.5 Hz, measured at a temperature x DEG C of a sample stage, is set as Fx, and the separator satisfies formula 1 below. [Formula 1] F75 / F40 > = 5.

The invention relates to a current collector module and a preparation method thereof, an electrode plate and a battery. The preparation method comprises the following steps: providing a current collector; performing plasma activating treatment on the surface of the current collector; and depositing a bonding enhancement layer on the surface of the current collector subjected to plasma activation treatment to obtain a current collector module, wherein the thickness of the bonding enhancement layer is less than 1 [mu] m. The current collector module prepared by the preparation method of the current collector module provided by the invention has relatively good bonding performance, and can effectively bond the active material layer, so that the electrode plate has relatively good use performance.

The utility model relates to the technical field of capacitor heat dissipation, and discloses a heat dissipation capacitor, which comprises a capacitor, a pair of terminal pins are arranged at the top of the capacitor, leads are arranged at the tops of the terminal pins, and a heat dissipation shell is arranged on the outer side of the capacitor. The heat dissipation shell comprises a shell body, installation grooves are formed in the front face and the back face of the shell body, exhaust outlets are formed in the installation grooves, heat dissipation pipes are installed on the inner side of the shell body, separation nets are arranged on the two sides of the shell body, a base is installed at the bottom of the shell body, and a thermoelectric module is installed in the middle of the base. According to the heat dissipation capacitor, the stability of the capacitor can be improved through the heat dissipation shell, temperature change can cause size and property change of internal materials of the capacitor, so that the electrical performance of the capacitor is influenced, heat dissipation can help maintain the stable working temperature of the capacitor, the influence of temperature change on the performance of the capacitor is reduced, and the stability of the capacitor is maintained.

This invention relates to the field of manufacturing electrode materials for thermal batteries, specifically a method for preparing gold-doped sulfide materials. The invention employs a low-temperature hydrothermal method to construct a doped framework, forming a uniform and complete micron- and / or nano-scale Au dopant on the framework. Then, a sulfur-addition process is used to achieve a more stable embedding of the dopant within the FeS2 particles, resulting in excellent thermal stability and high effective discharge capacity when the product is used as a thermal battery. The product obtained by this invention has a discharge specific capacity greater than or equal to 361 mAh / g and an internal resistance less than or equal to 0.102 Ω. The process of this invention is simple and controllable, and the resulting product has excellent performance, facilitating industrial application.

The utility model provides a kind of pole piece structure, roll core pole group and cylindrical battery, including pole piece body, pole piece body has coating area, several pole lug areas are arranged at interval along the length direction of pole piece body, at least one pole lug area is equipped with at least 2 pole lug arranged at interval between pole lug area, and pole lug is connected to the long side of pole piece body;Pole piece structure is after participating in winding and forms roll core pole group, and the pole lug area on pole piece structure is arranged at radial in the center hole of roll core pole group towards one end surface of roll core pole group. It improves the space utilization of battery shell, improves the infiltration problem of electrolyte, improves internal resistance and heat dissipation, and improves electrochemical performance.

The invention relates to a temperature control device for temperature control of battery cells (11), comprising a sheet-like main area (2) with a first plane (21) and a second plane (22), a plurality of first support areas (3) on the first plane (21), a plurality of second support areas (4) on the second plane (22), wherein first temperature control channels (5) are constructed between adjacent first support areas (3), wherein second temperature control channels (6) are constructed between adjacent second support areas (4), wherein the main area (2), the first support areas (3) and the second support areas (4) are integrally formed from reversibly deformable material, and wherein the first temperature control channels (5) and the second temperature control channels (6) extend through the main area from a first side (23) of the main area to a second side (24) of the main area (2).

This invention relates to agricultural biological control technology, aiming to provide a bamectin-degrading strain, Ldeb-1, and its application in enhancing the resistance of parasitic wasps. This strain is deposited at the China Center for Type Culture Collection (CCTCC), with the deposit name *Stenotrophomoans maltophilia* Ldeb-1 and the Latin taxonomic name *Stenotrophomoans maltophilia*, and the accession number CCTCC NO: M 20252462. The 16S rRNA gene sequence of the strain is shown in SEQ ID NO: 1. This invention provides a novel strain with outstanding degradation activity against the next-generation macrolide insecticide bamectin, offering a highly targeted and precise tool for addressing bamectin pesticide residue problems. Introducing a strain derived from a specific parasitic wasp species into its own species can enhance the parasitic wasps' intrinsic resistance to bamectin, representing a green, safe, and sustainable technology.

This application provides a single-cell battery, an energy storage device, an energy storage system, and a power supply system. The single-cell battery includes a casing; a cell, including a cell body and a tab connected electrically; a restraining member, including a side plate, a bottom plate, and a guide plate, the side plate being disposed around the outer periphery of the bottom plate and the bottom plate and the side plate defining a mounting groove, the bottom plate having a through groove, the guide plate protruding from the surface of the bottom plate facing the mounting groove and disposed around the outer periphery of the through groove; a tab passing through the through groove and partially located within the mounting groove; and an end cap assembly disposed on the side of the restraining member away from the cell body, the end cap assembly including an adapter, the adapter being connected to the end of the tab away from the cell body; the dimension of the tab passing through the through groove is w1, the dimension of the guide plate along a first direction is w2, the distance from the connection point of the adapter and the tab closest to the cell body to the end face of the tab away from the cell body is w3, then 2≤(w1-w3) / w2≤8.

The present invention provides: an electrolyte composition (14) which is capable of reducing move of an electrolyte solution; and a secondary battery (10). This electrolyte composition contains a solid electrolyte (18) which has lithium ion conductivity, an electrolyte solution (21) into which a lithium salt is dissolved, and a granular polymer (22) which is dispersed in the electrolyte solution. This secondary battery sequentially comprises a positive electrode (11), an electrolyte layer (14) and a negative electrode (15); and at least one of the positive electrode, the electrolyte layer and the negative electrode contains an electrolyte composition that contains a solid electrolyte which has lithium ion conductivity, an electrolyte solution into which a lithium salt is dissolved, and a granular polymer which is dispersed in the electrolyte solution.