41results about "Batteries" patented technology

The disclosed embodiments provide a battery cell. The battery cell includes a cathode current collector containing graphene, a cathode active material, an electrolyte, an anode active material, and an anode current collector. The graphene may reduce the manufacturing cost and/or increase the energy density of the battery cell.

The invention discloses a power battery thermal management system with functions of efficient heat dissipation and efficient heating. The power battery thermal management system comprises a power battery case and a thermal management system, wherein a plurality of battery monomers are adjacently aligned to form a battery pack placed inside a battery case housing, a composite phase change material plate is sandwiched between the gap of the adjacent batteries and the surface of the outermost side battery in the battery pack width direction, the composite phase change material plates and thermal pipes are combined to form composite phase change material thermal pipe coupling components, the composite phase change material thermal pipe coupling components are additionally arranged on both sides of the battery pack, the thermal pipes extends from the through holes on the battery module housing, the extending ends are connected to heating devices and heat dissipation fans, and a programmable automatic temperature regulator treats the signal from a temperature sensor by programming so as to determine whether the fans and the heating devices are started. The power battery thermal management system of the present invention has advantages of simple and firm whole structure, high efficiency, stable operating, and the like. In addition, the battery pack can be subjected to direct, unified and uniform cooling and heating, such that the battery can work at the appropriate temperature range, and the electric vehicle battery thermal management system is improved.

A rechargeable battery pack for a handheld power tool, encompasses a housing and at least one interface unit for establishing a mechanical and electrical connection between the rechargeable battery pack and the handheld power tool and/or a charging device. The interface unit has at least one locking element for locking the rechargeable battery pack onto the handheld power tool, and an actuation element for actuating the locking element. The actuation element encompasses at least one light-emitting element for outputting an optical signal and/or for illumination.

The invention relates to an electrolyte for a ternary cathode material lithium ion battery. The electrolyte comprises a lithium salt, organic solvent and an additive, wherein the lithium salt is an imidodisulfuryl fluoride lithium salt of which the concentration is greater than 1 mol/L; the organic solvent comprises cyanogen carboxylate and other non-water organic solvent; the addition mass of the cyanogen carboxylate is 5-35% of the total mass of the organic solvent; the cyanogen carboxylate is a combination of one or more selected from the following structural formulae in the specification; and at least one of R1 and R2 is a cyanogen radical or a cyanogen radical containing group. By using the electrolyte provided by the invention, the cycle performance of the ternary cathode material lithium ion battery at normal temperature can be stabilized, the aging and swelling phenomena of the ternary cathode material lithium ion battery under high-temperature conditions can be inhibited, and the internal resistance of the ternary cathode material lithium ion battery is reduced.

Provided is a process for producing a rope-shaped alkali metal battery, comprising: (a) providing a first electrode comprising a first conductive porous rod and a first mixture of a first electrode active material and a first electrolyte residing in the pores of the first porous rod; (b) wrapping or encasing a porous separator around the first electrode to form a separator-protected first electrode; (c) providing a second electrode comprising a second conductive porous rod and a second mixture of a second electrode active material and a second electrolyte residing in the pores of the second porous rod; (d) combining the separator-protected first electrode and second electrode to form a braid or a yarn having a twist or spiral electrode; and (e) wrapping or encasing a protective casing or sheath around the braid or yarn to form the rope battery.

The present invention relates to a battery module, which includes one or more battery cell units, and the battery cell unit includes a battery cell, a fixing member located surrounding an outer circumference surface of the battery cell, and a heat absorbing material located between the battery cell and the fixing member, and as a result, heat generation inside the battery module is suppressed, and ignition between the series-connected battery cell units may be suppressed. Accordingly, excellent charge and discharge efficiency, an excellent cycle property and a lifespan property of the battery may be exhibited without concern for explosion or ignition of the battery module.

Provided is an auto-thermal evaporative liquid-phase synthesis method for cathode material for battery, comprising the following steps: (1) Adding a synthetic raw material of cathode material into a solvent to obtain a mixture A, the synthetic raw material of the cathode material containing lithium source, adding an accelerant into the mixture A, which makes the mixture A achieve a strong auto-thermal reaction to release heat to evaporate the solvent, and obtaining a solid precursor of the cathode material; (2) Drying the precursor, sintering in an atmosphere furnace and obtaining the cathode material. The method is simple in process, low in energy consumption, requirements for equipment and cost, and is applicable to industrial mass production and application. The cathode material obtained through the method is stability in batch, easy to process, low in internal resistance and high in capacity and has an excellent charging and discharging performance.

The invention provides a thermal runaway control system for a lithium ion battery pack of a new energy automobile, and the battery pack. The control system comprises a water pump, a water tank and at least two groups of battery packs; each battery pack is matched with a three-way valve which is controlled and gated by a BMS; each battery pack liquid cooling plate is provided with a discharging valve which also can be controlled to be opened by the BMS; and a floating pipeline, which can be lowered along with a liquid surface and is connected with inlet water and outlet water of the water tank, is arranged in the water tank. By means of controlling the flow of the water pump and the flowing direction of an anti-freezing solution, the battery pack in thermal runaway can be full by the anti-freezing solution within 10s; when battery pack thermal runaway occurs in certain several packs, the liquid cooling plate valve in the battery pack in thermal runaway is controlled to be opened, and meanwhile, the three-way valves of other packs are controlled to be connected with the water tank; and therefore, spreading of heat to other battery packs can be blocked by means of controlling the thermal runway of a single battery pack or a few battery packs.

A tearable low adhesive sheet (29) is attached to a battery pack (19). This low adhesive sheet (29) is bonded with a double-sided adhesive tape (31) to a bottom face (17a) of a battery accommodating part (17) shaped into a recess and provided to a front cabinet (7) included in a casing (3), so that the battery pack (19) is secured to the battery accommodating part (17).

In a nonaqueous secondary battery including a pressure-operated current interrupt device, a ratio (Vt/Cr) of a sum Vt (cm³) of an effective pore volume Vp of the positive electrode active material layer, an effective pore volume Vn of the negative electrode active material layer, and a pore volume Vs of the separator to a volume Cr (cm³) of a remaining space in the battery case is 0.92 to 1.05. The volume Cr of the remaining space in the battery case is calculated by subtracting a volume Ce of the electrode body, a volume Cna of the nonaqueous electrolytic solution, and a volume Cc of auxiliary components from a volume Ct of the battery case. The remaining space volume Cr (cm³) is 14.8 vol % or higher of the volume Ct (cm³) of the battery case.

A battery module including a plurality of cell units is disclosed. Each cell unit has a first surface and a second surface, and the cell units are stacked alone a direction. The cell unit includes a frame, at least one cell and at least two conductors. The frame has at least a first accommodating recess located at the first surface. The cell having two tabs is accommodated in the first accommodating recess. The conductors and the frame are connected at the second surface, and each conductor has a connecting portion located at the first surface. The connecting portions of the two conductors are ultrasound welded with the two tabs respectively. The conductors of adjacent cell units are fixed to each other.

Embodiments of the invention disclose a battery, a telescoping device, a shell, and a battery fixing system. The battery is provided with at least one groove at one side opposite to a metal conducting strip. According to the embodiments of the invention, reliability of fixation of the battery can be improved.

A method and apparatus for evaluating CEW performance, in particular by evaluating a battery pack condition state via direct or indirect means. A two-tier load test for a CEW battery pack and an indirect wireless spark analysis tool are disclosed.

The invention discloses a battery device. The battery device comprises: a semiconductor thermoelectric generation module; a boosting constant current module, wherein the input end of the boosting constant current module is connected with the output end of the semiconductor thermoelectric generation module; and a battery module connected with the output end of the boosting constant current module. The invention also discloses a wearable apparatus with the battery device. The battery device can improve the battery life of the wearable apparatus.

A wiring module includes a busbar for connecting between electrode terminals, an external connection busbar to be connected to an external terminal, a resin protector including a first holding portion for holding the busbar and a second holding portion for holding the external connection busbar and a main cover for covering the first holding portion. The main cover includes a first auxiliary cover for covering the second holding portion and a second auxiliary cover connected to the first auxiliary cover via a hinge portion. The first auxiliary cover is provided with an interfered portion for interfering with an interfering portion of the second holding portion as the main cover is mounted on the resin protector, and the first auxiliary cover is automatically rotated and arranged at a predetermined position by the interference of the interfered portion and the interfering portion.

The invention provides a battery cooling system, a vehicle power exchange system and a battery cooling control method. The battery cooling system comprises a cooling liquid loop, a bypass branch and acontrol module, wherein the cooling liquid loop comprises a cold supply source, a liquid storage container, a power source and a plurality of battery cooling branches, the cold supply source, the liquid storage container and the power source are connected, the plurality of battery cooling branches are connected in parallel, a rechargeable battery is connected to the battery cooling branches underan application state, a first end of the bypass branch is connected with the cooling liquid loop between a downstream of the power source and an upstream of the battery cooling branches, a second endof the bypass branch is connected with the cooling liquid loop between a downstream of the battery cooling branches and an upstream of the power source, the bypass branch is controllably conducted ordisconnected, at least one part of cooling liquid passes through the bypass branch in a condition state, and the control module is used for maintaining pressure difference between an inlet and an outlet of each battery cooling branch within a preset zone by controlling on or off of the bypass branch. By the battery cooling system, the vehicle power exchange system and the battery cooling controlmethod, the battery cooling system can be maintained to stably work, and the rechargeable battery obtains a stable cooling effect.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a pole piece for a button battery. The pole piece comprises a current collector including a coating area and an empty foil area which are adjacently arranged, an active substance layer and a tab, wherein the empty foil area is provided with unfoldable wrinkles; the active substance layer is arranged on at least one surface of the coating area; and the tab is connected with the empty foil area. According to the invention, the current collector empty foil area is provided with the unfoldable wrinkles so that in the charging expansion process of a roll core of the button battery, the wrinkles of the current collector empty foil area of the outermost layer pole piece of the roll core have a certain extension space, and the outermost layer pole piece of the roll core can be prevented from being broken due to a pulling stress; and the reject ratio of a large internal resistance and the reject ratio of a zero voltage are also reduced.

The invention relates to a novel battery cooling structure based on coupling of heat pipe and liquid cooling plate, which comprises a battery, a liquid cooling plate and an L-shaped heat pipe, the liquid cooling plate is arranged at the bottom of the battery, the L-shaped heat pipe comprises a vertical evaporation section and a horizontal condensation section, the evaporation section absorbs the heat of the wall surface of the battery main body, and the condensation section transfers heat absorbed by the evaporation section to the liquid cooling plate. The heat pipe is combined with the liquidcooling plate, the heat pipe takes away heat on the wall surface of the battery main body, the heat passes through the evaporation section and the condensation section of the heat pipe and then is taken away through the liquid cooling plate, other energy supplies are not needed in the whole heat dissipation process, and the structure is an efficient and energy-saving cooling mode. The cooling capacity of the liquid cooling plate to the bottom of the battery is not reduced, and the heat dissipation of the wall surface of the battery main body is increased, so that the total heat exchange effect is certainly improved compared with the traditional cooling structure, and the structure can effectively reduce the temperature of the wall surface of the battery, improve the charge-discharge performance of the battery and reduce the influence of reduction of the capacitance of the battery caused by temperature rise.

The invention discloses a vehicle battery module based on PCM cooling. The vehicle battery module comprises a casing box composed of a composite phase change material; the surface of the casing box isrecessed downward to form a plurality of battery holes; the outer side surface of the casing box is wrapped with an annular air duct plate, so that the outer side surface of the casing box and the inner side surface of the air duct plate form a closed air duct cavity; a partition plate is fixed in the air duct cavity; the partition plate divides the air duct cavity into a first air chamber and asecond air chamber, which are relatively sealed; the first air chamber is provided with an air outlet tube; the second air chamber is provided with an air inlet tube; the air inlet tube is connected with a wind pump; the vehicle battery module further comprises cooling fans; one end of the cooling fan is fixed on the outer side surface of the casing box, and the other end penetrates the air duct plate and extends to the outside. The vehicle battery module based on PCM cooling solves the problem that when the battery temperature is too high, the PCM material can not satisfy the heat dissipationeffect; at the same time, the temperature inside the PCM material is difficult to exchange heat with the outside, which causes the temperature inside and outside to be uneven, which affects the heatdissipation performance.

An electrical storage system includes an electric storage zone, an electric storage positioned within the electric storage zone, a cooling fluid source in fluid communication with the electric storage zone via a fluid flow path, a modulating valve in the fluid flow path downstream from the cooling fluid source and upstream from the electric storage zone, and a detector in fluid communication with the electric storage zone. A method for operating an electrical storage system includes adjusting a modulating valve in a fluid flow path to reduce a cooling airflow to an electric storage zone, operating a detector in fluid communication with the electric storage zone configured and adapted to sense at least one of smoke, gas, or other particulates during a detection period with a detection system, and adjusting the modulating valve to increase the cooling airflow to the electric storage zone.