149 results about "Battery cell" patented technology

Solar-powered lighting devices that may be portable and/or collapsible are described. The devices may include a housing including a first wall, a second wall, and one or more side walls between the first wall and the second wall, at least one solar panel to generate solar energy, and a rechargeable battery to store the solar energy generated. The devices may include a plurality of operating modes for controlling lights within the housing, and a microprocessor for controlling the operating modes.

The invention relates to a capacitor of a lithium ion battery. The capacitor comprises a capacitor shell, an organic electrolyte arranged in the capacitor shell, a winding core formed by isolating a positive plate from a negative plate through an ion permeability microporous membrane and winding, wherein the positive plate and the negative plate are respectively connected with a positive lug and a negative lug and are led out by the positive lug and the negative lug to a positive end and a negative end of the capacitor shell. A negative active material comprises a material A and a material B, wherein the material A comprises at least one of hard carbon and soft carbon, the material B comprises at least one of natural graphite, modified graphite and synthetic graphite, the material A accounts for 50.0%-95.0% of the capacity percentage of the negative active material, and the material B accounts for 5.0%-50.0% of the capacity percentage of the negative active material. The capacitor has the high-energy density characteristic of the lithium ion battery and the high-power density characteristic of a double electric layer capacitor.

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 an accumulator battery online equalizing system which comprises a central processing controller, an electricity quantity acquisition module, a battery switching module, a voltage online equalizing module, an internal resistance and capacity online equalizing module and the like. The system can perform online and real-time equalizing adjusting on the voltage, the internal resistance and the capacity of a battery cell in an accumulator battery, can ensure that each battery in the accumulator battery is operated at an optimized operating state, greatly prolongs the operating life of the accumulator battery by more than two times, improves the reliability and the performance of the accumulator battery, reduces the environment pollution caused by the battery, and has good social benefit and environmental protection property; and the system adopting the active equalizing method can cancel the traditional equalizing method of periodic charging, reduces water loss of the battery, greatly reduces the probability of incontrollable low heat, prolongs the service life of the battery, simultaneously avoids the vulcanization of the battery, and saves a large amount of cost.

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.

The invention relates to the field of lithium ion battery designs, and discloses a lithium ion battery pack and a soldering method for single batteries therein. The lithium ion battery pack comprises a plurality of single batteries which are connected in series or in parallel through soldered lugs; and the soldering method for soldering the first lug and the second lug of any two single batteries includes the following steps: a rigid plate is arranged on the backs of the horizontal bent sections of the first lug and the second lug, and is in plane contact with the backs of both the first lug and the second lug, wherein a predetermined gap is reserved between the first lug and the second lug which are horizontally opposite to each other; soldering is carried out on the top of the rigid plate in the gap between the first lug and the second lug, a tin bar is melted, the gap is covered by and filled with the melted tin, and the melted tin permeates to the top of the rigid plate; and the melted tin is solidified and shaped. The heat-dissipating effect of the method is better, and moreover, the structure of the soldered parts of the lugs is firmer, which can help to enhance the conductivity of the lithium ion battery pack.

The invention discloses a temperature pre-regulation system and method of a power battery pack and a thermal management system control method, and relates to the technical field of power batteries. The temperature pre-regulation control system comprises a battery pack, a thermal management system, an automobile electricity utilization load and a control system, wherein the control system comprisesa controller, an acquisition module and an instruction module; the acquisition module acquires battery pack parameter information, compares the battery pack parameter information with a preset parameter value in the controller, and controls the automobile electricity utilization load and the thermal management system through the instruction module to realize battery pack temperature pre-regulation. According to the invention, the battery pack can work in a relatively large temperature range, responses can be made in time for various problems of the battery pack, and especially when the discharge current is relatively large and the temperature rise of the battery is delayed, the flow of the cooling liquid is pre-adjusted, so that the uncontrollable condition of the battery is avoided; andmeanwhile, the controller has the functions of continuously learning and optimizing control parameters, and can carry out continuous adjustment according to the driving habit of a driver and the gradual aging of the battery.

The invention discloses a battery pack active equalization method and a battery pack active equalization device. The battery pack active equalization device is composed of an intelligent control unit, a BMS communication unit, a differential-amplification pressure difference detection unit, and an electric energy transfer unit. The BMS communication unit acquires the current value and ampere hour from a BMS. The differential-amplification pressure difference detection unit detects the voltage of batteries one by one through a differential amplifier and sends the detection values to the intelligent control unit. The electric energy transfer unit is used for transferring energy from a battery cell to a battery cell, from a battery cell to a battery module or from a battery cell to a battery pack. The intelligent control unit receives the current value and ampere hour information acquired by the BMS communication unit and the test values of the differential-amplification pressure difference detection unit, and makes operational analysis according to the received current value and ampere hour information acquired by the BMS communication unit and the test values of the differential-amplification pressure difference detection unit so as to make the electric energy transfer unit transfer the energy of battery cells. The method and the device of the invention have the characteristics of high equalization efficiency, accurate equalization current flow and high cost performance.

Provided are a redox flow battery system and a method for operating a redox flow battery that suppress overcharge and overdischarge of an electrolyte.

A redox flow battery system includes a pump that supplies an electrolyte to a battery cell by circulation, a pump controller that controls a flow rate of the pump, and a measurement unit that measures at least two parameters selected from among an inlet-side state of charge of the electrolyte supplied to the battery cell, an outlet-side state of charge of the electrolyte drained from the battery cell, and a charge/discharge current input to/output from the battery cell. The pump controller includes a pump flow-rate computation unit that calculates a charge/discharge efficiency of the battery cell from the parameters measured by the measurement unit and, based on the charge/discharge efficiency, determines the flow rate of the pump so that the electrolyte drained from the battery cell is neither overcharged nor overdischarged. The pump controller also includes a pump flow-rate instruction unit that sets in the pump the flow rate determined by the pump flow-rate computation unit.

The invention discloses a method for detecting an inner connecting resistor of a power battery pack. The method includes the following steps that (1) the alternating current inner resistance Zi of each battery cell is tested before battery modules are assembled; (2) the alternating current inner resistance Zm of each battery module is tested after the battery modules are assembled and before the battery pack is assembled, and the inner connecting resistor comprehensive value Rci of each battery module is calculated through the Zi and the Zm; (3) constant-current discharge is conducted on the power battery pack, the direct current resistance Di of each battery module and the direct current resistance Dp of the battery pack are calculated, and the connecting resistor comprehensive value Rco between the modules is calculated through the Di and the Dp; (4) the inner connecting resistor comprehensive value Rc of the battery pack is calculated through the formula Rc=Rci+Rco; (5) the inner connecting resistor of the power battery pack is evaluated through the Rc. According to the method for detecting the inner connecting resistor of the power battery pack, the structure of the battery pack does not need to be damaged, the Rc can be calculated effectively and conveniently, and therefore support is provided for the connecting resistor design of the battery pack and the electrical property and health condition judgment.

The invention provides a lithium battery and a lithium battery packaging housing. The lithium battery comprises a housing, a cover plate and a pole piece roll core arranged in the housing. The front surface and the back surface of the housing are consistent in structure, and the left side surface and the right side surface of the housing are consistent in structure. A heat superconducting pipelineand a refrigerant channel are combined together on the housing; the heat superconducting pipeline is filled with a phase change inhibition working medium to form a phase change inhibition heat transfer packaging housing, and the heat superconducting region has the characteristics of high heat conduction rate and good temperature uniformity; and by utilizing the characteristics of high heat conduction rate and good temperature uniformity of the heat superconducting region and high heat exchange rate of the refrigerant heat exchange region, the temperature difference between a battery and the outside and the effective heat transfer area are increased, the heat dissipation and heat equalization capabilities of the battery are greatly improved, and the safety performance of the lithium battery is improved.

The invention discloses an energy storage system BMS wireless networking communication system, comprising an energy management system EMS, a battery array management unit BAU, a bidirectional inverterPCS and a battery cluster, wherein the battery array management unit BAU and the bidirectional inverter PCS are in communication connection with the energy management system EMS at the same time; anda battery cluster in communication connection with the battery array management unit BAU. The battery cluster comprises a battery string management unit BCU and a battery module management unit BMU which perform data interaction through Bluetooth communication. The invention further discloses an energy storage system BMS wireless networking communication method. According to the energy storage system, a wireless communication mode is adopted at a short distance, the anti-interference capability can be improved, the cost for installing communication wiring harnesses is saved, energy storage facilities in an energy storage area can be arranged at will, the product structure development period is shortened, and the product power consumption is reduced.

The invention discloses a preparation method of battery-grade anhydrous lithium hydroxide, wherein industrial-grade lithium hydroxide monohydrate is used as a raw material, and the preparation steps comprises: dissolving, ultrafiltration, adsorption, recrystallization, jet milling, vacuum drying, electromagnetic iron removal, vacuum packaging and the like so as to finally obtain the battery-gradeanhydrous lithium hydroxide. The process is simple and high in operability, the added value of products is greatly increased, and economic benefits and social benefits of the products are increased.

The invention discloses an off-line battery replacement method and system of a battery replacement cabinet, a terminal and a storage medium. The method comprises the steps: receiving a Bluetooth connection request initiated by a user terminal when the battery replacement cabinet is detected to be in an off-line state; when an order sent by the user terminal through Bluetooth connection is received, opening an idle battery compartment, and prompting to place a to-be-replaced battery; obtaining a first ID of the to-be-replaced battery placed in the idle battery compartment, and judging whether the first ID is consistent with a second ID in the order; and if so, opening the full-power battery compartment, and prompting to take out the full-power battery in the full-power battery compartment. By means of the mode, when the battery replacement cabinet cannot be connected to the network or disconnected from the network, the Bluetooth module of the cabinet body is connected with the user terminal for data communication so as to achieve off-line battery replacement, normal work of the battery replacement cabinet system is not affected, the battery utilization rate can be increased, the operation income can be increased too, verification is performed through the server, and the legality of battery replacement operation is ensured.

The invention discloses a microneedle beautifying device based on ultrasonic atomization. The microneedle beautifying device comprises a host machine and a microneedle oscillating head; a PCB, a battery, an LCD display screen and a power switch are arranged in the host machine to supply power to a piezoelectric vibration plate of the microneedle oscillating head; the piezoelectric vibration plate,a vibration seat, a microneedle piece mounting seat, a solution bottle and a microneedle piece form an oscillation component, and the oscillation component is connected with a connecting seat througha spring; and the microneedle oscillating head is in threaded engagement with the connecting seat of the upper shell of the host machine through external threads of the connecting seat. Through the vibration of the piezoelectric vibration plate, a cosmetic liquid in the solution bottle is ultrasonically atomized, so that the cosmetic liquid is converted into an atomized state from a liquid state,and the absorption by the skin is facilitated. Due to the integrated design of the microneedle piece and the solution bottle, a microneedle opens a skin leading-in channel and finishes leading-in ofthe cosmetic liquid into the skin at the same time, and efficient absorption of cosmetic products can be achieved.

The invention discloses a fuel cell with a cathode flow channel flow distribution design and catalyst layer Pt content gradient distribution. The fuel cell sequentially comprises an anode collector plate, an anode diffusion layer, a membrane electrode with gradient platinum content, a cathode diffusion layer and a cathode collector plate, and is characterized in that the cathode collector plate forming a cathode module of the fuel cell is provided with a main air inlet and at least one flow distribution air inlet so as to introduce air with different flow rates, and the catalyst concentrationof a cathode catalyst layer of the membrane electrode with the gradient platinum content is increased in a gradient manner from the air inlet to the air outlet. The catalyst layer of the membrane electrode fuel cell with the gradient platinum content adopts gradient distribution, so that gas at the outlet of the cell completely reacts, and the effects of uniformly utilizing an active region and reducing the production cost are achieved; by adopting the flow distribution gas inlet, the distribution of the gas in the battery is changed, the diffusion mass transfer of the gas in the cathode sidediffusion layer is improved, and the effect of improving the performance of the battery is achieved.

The invention relates to an embedding method of a lithium battery sensing optical fiber. The key is to avoid physical damage, optical performance decline or battery electrolyte performance decline ofthe optical fiber sensor after long-term use caused by direct contact between the optical fiber and electrolyte. The method has a plurality of modes and is suitable for a plurality of practical environments. The optical fiber sensor can be effectively embedded into the lithium battery to monitor various sensing quantities such as temperature, vibration, strain/stress and the like without affectingthe battery performance and the optical fiber sensing performance. The embedding process and the sealing process for arranging optical fibers into lithium batteries can be provided and a good foundation is laid for distributed optical fiber temperature measurement inside lithium batteries in the later period.

The invention provides a plug-in type ultrasonic flow meter, a flow metering system and a flow metering method, which belongs to the field of flow monitoring. The push-in type ultrasonic flow meter comprises a main plugging rod, wherein a first branch portion and a second branch portion are spaced and symmetrically arranged at one end of the plugging rod, which is plugged into a pipeline, the first branch portion and the second branch portion are arranged at the upstream and the downstream of the pipeline respectively, a first ultrasonic transducer is arranged on the first branch portion, and a second ultrasonic transducer corresponding to the position of the first ultrasonic transducer is arranged on the second branch portion. Compared with the prior art, the plug-in type ultrasonic flow meter provided by the invention has strong signal reception capacity, and lower channel noise, so that the power consumption is less and the power can be supplied by a battery. Also, the plug-in type ultrasonic flow meter has a stable and concise structure, is convenient in use, and can accurately measure the slow pipe flow rate and pipe flow.

The invention discloses an air tightness detection device and an air tightness detection method. The air tightness detection device provides special equipment for detecting the air tightness of a battery pack PACK upper cover, a workpiece sealing mold is arranged to form a sealable cavity with the battery pack PACK upper cover, and the position precision of the workpiece sealing mold is ensured through a positioning structure. An edge sealing mechanism and an anti-deformation mechanism are combined to guarantee the sealing performance and prevent the battery pack PACK upper cover from deforming during detection, so that reliable conditions are created for airtightness detection, airtightness detection of the battery pack PACK upper cover can be effectively carried out, and a basic guarantee is provided for improving the airtightness of the battery pack.

A method and device for cooling the electrolyte of aqueous battery cells such as lead acid batteries. The method includes the steps of delivering non-saturated gas to the electrolyte of in the battery cell, contacting said non-saturated gas with said electrolyte so that water from said electrolyte evaporates and thereby cools said electrolyte, and allowing the gas to escape from said battery cell, thereby removing heat from the electrolyte. An apparatus for carrying out the method is also provided. A fluid conduit is positioned to deliver the cooling air to the electrolyte within the cell. At least one pump delivers the air to the fluid conduit.

The invention discloses a method, device and equipment for predicting overlarge differential pressure of a battery pack, and the method comprises the steps of determining a single battery cell with apotential problem in the battery pack; acquiring voltage sampling data of a battery pack of a single battery cell with a potential problem; when the voltage sampling data is located in the same temperature interval and the same battery remaining capacity interval, calculating the maximum slope under two adjacent groups of voltage sampling data of the battery pack; judging whether the maximum slopeexceeds a preset slope threshold value or not, and when the maximum slope exceeds the preset threshold value, judging that the voltage difference of the battery pack is too large. The method achievesthe prediction of the overlarge differential pressure of the battery pack, can take corresponding measures in advance when the overlarge differential pressure of the battery pack is predicted, and prevents the overlarge differential pressure of the battery pack from affecting the energy of the battery pack.