31results about "Multimode batteries" patented technology

A power tool is provided including a power supply interface receiving a removable battery pack, a brushless direct current (BLDC) motor including a rotor and a stator, and a multi-phase inverter bridge circuit. A controller is provided to output drive signals to the inverter bridge circuit to control flow of current from to the motor, where each drive signal is activated within each corresponding phase of the motor within a conduction band. The controller is configured to control a length of the conduction band at a variable value within a first torque range below a torque threshold and at a substantially constant value within a second torque range above the torque threshold. The torque threshold is greater than approximately 1 Newton-meters and the motor produces a maximum power output of at least approximately 1250 watts at the torque of approximately 1 Newton-meters.

Methods and devices are disclosed herein pertaining to an auxiliary electrodes for transferring of carrier ions to into a batteries such as secondary batteries e.g., a lithium-ion batteries. The batteries may comprise silicon based active material. The batteries may comprise stacked unit cells. The auxiliary electrode and battery may be sealed in an enclosure.

The present invention relates to charging and discharging methods of a lithium ion battery with a high capacity retention rate, which comprise the following steps: (1) when a number of turns is n, the negative and positive electrodes of the lithium ion battery are only charged; after the charging is finished, a third electrode and a fourth electrode are discharged with controlled current, wherein the controlled current is 0.05 - 10 A; (2) after standing for 1 hour, the fourth electrode is connected in parallel with the negative electrode of the lithium ion battery to perform the discharge with the positive electrode of the lithium ion battery; (3) common charge and discharge between the positive and negative electrodes of the lithium ion battery occur at the (n + 1) th and subsequent turns; (4) the common charge and discharge are continued until the next conditional number of turns, and steps (1) - (4) are repeated; and (5) when the number of cycles reaches the specified number of turns, the charging and discharging methods are finished; n is the conditional number of turns, which is selected from the next turn every time the discharge capacity is attenuated by 0.2 - 1%. The charging and discharging methods can release active lithium according to the self-demand of each battery cell or battery pack, so as to facilitate the capacity retention rate.

Disclosure is a multi-voltage battery pack which includes: a housing, battery strings disposed inside the housing and including a plurality of battery cells, a battery interface disposed on the housing for use with the power tool, and a converting assembly disposed within the housing and electrically connected to the battery strings. The converting assembly has a first state, a second state, and a third state. The multi-voltage battery pack can separately output a first operating voltage, a second operating voltage, and a third operating voltage. The third operating voltage is greater than the second operating voltage, and the second operating voltage is greater than the first operating voltage.

The invention provides a power tool system and a battery pack (100) thereof, the battery pack (100) comprises a housing (101) provided with a socket (110) located thereon, and two battery cell groups (102, 103) received in the housing. Each battery cell group has a positive electrode and a negative electrode. The socket has four conductive terminals (111, 112, 113, 114) respectively, which are electrically connected to electrodes of the two battery cell groups. The two battery cell groups can be switched between an isolated state and a series connected state to output two different voltages through two conductive terminals with different polarities being disconnected or connected to each other, and where the two conductive terminals with different polarities respectively are connected to the two battery cell groups.

A battery bank unit includes: a first battery bank and a second battery bank that are connected in parallel to each other; and a control apparatus that performs collective charge for collectively charging the first battery bank and the second battery bank, performs first bank charge for charging only the first battery bank after the collective charge, and performs second bank charge for charging only the second battery bank after the first bank charge. The control apparatus calculates remaining time to complete charge of the battery bank unit based on a temperature of the battery bank unit at a start of the collective charge.

The disclosure provides an energy storage device comprising four energy units with a same rated voltage and a socket, wherein the four energy units are equally divided into two energy modules, and the socket comprises two voltage output terminals respectively connected with a positive electrode and a negative electrode of the electric energy storage device. The socket is further provided with an in-module control part for switching the connection state of two energy units in the energy modules and an inter-module control part for switching the connection state between the two energy modules. The disclosure provides an electric tool system, wherein the electric tool is provided with a plug coupled with a socket. The energy storage device can provide three output voltages, which can be matched with electric tools with different rated voltages, improves the adaptability of the electric energy storage devices, and reduces the cost.

A method for monitoring and controlling a vehicle battery pack that includes a plurality of battery cells. The battery cells each include a switching unit which serves to connect and disconnect the respective battery cells. Pack information of the battery pack is acquired, a pack voltage of the battery pack is calculated on the basis of the cell voltages and a current activation pattern for actuating the switching units. An electrical power requirement of the vehicle is predicted based on GPS information. A state of the battery pack is estimated based on the pack information and the current activation pattern and an optimized activation pattern for actuating the switching units on the basis of the predicted electrical power requirement and the estimated state of the battery pack is calculated. The switching units of the respective battery cells are actuated according to the optimized activation pattern.

A battery module includes: a plurality of battery cells stacked in a predetermined direction and electrically connected together; a plurality of bus bars that electrically connect the plurality of battery cells together; and a plurality of voltage detection wires each connected to one set of two or more battery cells electrically connected together. According to the battery module, the number of the voltage detection wires is reduced, thereby attaining reduced sizes of the bus bars, productivity improved by improved workability, and reduced cost.

A dual battery system, including: a primary battery which drives a starter motor; an auxiliary battery which drives one or more auxiliary loads; an alternator which supplies current to recharge the primary battery; and a power supply circuit which supplies current from the alternator to recharge the auxiliary battery when a surplus condition is detected, the surplus condition indicating that the alternator is generating more electrical power than is required for recharging the primary battery, wherein the power supply circuit ceases to supply current to recharge the auxiliary battery when absence of the surplus condition is detected so that the primary and auxiliary batteries become electrically isolated, thereby ensuring that recharging of the auxiliary battery does not have an adverse effect on the level of charge of the primary battery.

Assembly comprising an electrochemical element and a rechargeable electrical element and associated manufacturing process. The assembly (10) comprises: - an electrochemical element (20) comprising: - a container (22) extending along a first central axis (A-A'), having an external tubular wall (24) delimiting an internal volume (30) receiving a first electrochemical bundle (32); - a rechargeable electrical element (40) electrically connected to the electrochemical element (20). The rechargeable electrical element (40) is a pouch-type element comprising a second bundle (43) having a first electrode, a second electrode, and at least one separator, the second bundle (43) being spirally wound around a second central axis (B-B') coaxial to the first central axis (A-A') and around the external tubular wall (24) of the electrochemical element (20). Figure for the abbreviation: Figure 2

Methods and devices are disclosed herein pertaining to an auxiliary electrodes for transferring of carrier ions to into a batteries such as secondary batteries e.g., a lithium-ion batteries. The batteries may comprise silicon based active material. The batteries may comprise stacked unit cells. The auxiliary electrode and battery may be sealed in an enclosure.

The invention relates to an HV battery system (2) comprising a plurality of cell groups, each of the cell groups comprising at least one battery cell (1), a circuit arrangement comprising a plurality of converter devices (3), each of the cell groups being assigned one of the converter devices (3), and the circuit arrangement being configured such that the cell groups can be coupled and uncoupled independently of one another via the assigned converter device (3), so that cell groups can be connected in parallel to form a high-voltage bus, and a method for doing so.

SOLUTION: There is provided a battery cell connection structure that connects two battery cells 14 in series with two rectangular battery cells 14 stacked in the thickness direction, in which a positive electrode tab 20a of one of the battery cells 14 and a negative electrode tab 20b of the other battery cell 14 are inclined with respect to the direction in which the two battery cells 14 are stacked, and with the positive electrode tab 20a and the negative electrode tab 20b stacked in the thickness direction, the positive electrode tab 20a and the negative electrode tab 20b are connected.SELECTED DRAWING: Figure 10

An electric energy storage device comprises four energy units with a same rated voltage and a socket. The four energy units are divided into two energy modules each comprising with two energy units. Each energy module is provided with a positive electrode and a negative electrode. The socket includes four voltage output terminals connected to the positive and negative electrodes of the two energy modules and is provided with two control parts, which respectively control the two energy units in the two corresponding energy modules to switch between parallel state and series state. An electric tool system is also provided, comprising a plug that is connected to the socket, and different plugs can connect the four energy units in different connection states. The electric energy storage device with multiple output voltages can be matched with various electric tools with different rated voltages and reduces the cost.

The present invention relates to an electrode assembly for a secondary battery, the electrode assembly for a secondary battery including at least one positive electrode and at least one negative electrode alternately stacked in a state in which a separator is interposed therebetween, wherein the positive electrode includes a first positive electrode having a single positive electrode tab and a second positive electrode having two or more positive electrode tabs, and the negative electrode includes a first negative electrode having a single negative electrode tab and a second negative electrode having two or more negative electrode tabs, whereby the output of the electrode assembly is adjustable.

A method of production of layered composite material packs for use as an electrode by a material bonding process, comprises: stacking multiple material layers to be bonded forming a pack, assembling several packs for forming a stack, with placing inert interface plates between adjacent packs (3) to separate the packs by the inert interface plates, placing inert interface plates on top and bottom of the stack, placing the stack in between a top and a bottom plate and connecting the top and bottom plates with constraining fixtures for forming a rack, whereas the material of the constraining fixtures is so chosen that their thermal expansion coefficient is smaller than a value of thermal expansion for the total of the stack, pressing towards each other the top and bottom plates to apply an initial pressing force, placing the rack into a furnace, heating up the furnace to a bonding temperature with a heating rate between 0.1K / min and 35K / min and applying a connecting pressure due to the difference in thermal expansion coefficients of the stack material and the constraining fixtures, holding the bonding temperature for a predetermined time to form a bond via material diffusion in between the material layers, cooling down the furnace, disassembling the stack and removing the bonded packs.

Embodiments described herein relate to electrochemical cells with dendrite prevention mechanisms, and methods of producing and operating the same. ln some aspects, an electrochemical cell can include an anode and a cathode material disposed on a cathode current collector, the cathode material and the cathode current collector forming a cathode.The electrochemical cell further includes a first separator disposed on the anode, a second separator disposed on the cathode, and an interlayer disposed between the first separator and the second separator, the interlayer including electroactive material, the interlayer including a source of lithium ions, the lithium ions configured to migrate toward the anode upon a voltage difference between the interlayer and the anode exceeding a threshold value. In some embodiments, the anode can include an anode material disposed on an anode current collector. ln some embodiments, the anode material can include graphite, silicon, and / or hard carbon.

The application relates to a distributed large-scale system of an all-vanadium redox flow battery, comprising a main electrical energy storage center, power distribution subsystems and a control subsystem. If the power of the power distribution subsystem does not meet a preset power requirement and / or the distance between the power distribution subsystem and the main electrical energy storage center exceeds a preset distance, a sub electric energy storage center connected with the main electrical energy storage center is arranged in the power distribution subsystem. The power distribution subsystem comprises an electric energy load point and / or an electric energy access point. The main electrical energy storage center and the plurality of power distribution subsystems are electrically connected with the control subsystem respectively. The power supply system has the effect of meeting the power increase and decrease requirements of a plurality of distributed external loads or power supply systems.

A battery control system (1) controls a solid-state battery including a battery cell (21) having a solid electrolyte and a negative electrode containing lithium. The battery control system includes: a measurement unit that measures a surface pressure distribution from an actual measured value or an estimated value of a surface pressure distribution on a main surface of the battery cell (21); and a control unit that controls a charge / discharge current of the solid-state battery, the charge / discharge current being at least one of a charge current and a discharge current. The control unit determines the charge / discharge current according to an upper-limit surface pressure difference and a lower-limit surface pressure difference, the upper-limit surface pressure difference being a difference between a measured value of the surface pressure distribution measured by the measurement unit and an upper limit surface pressure of the battery cell (21), the lower-limit surface pressure difference being a difference between the measured value of the surface pressure distribution measured by the measurement unit and a lower limit surface pressure of the battery cell (21).

Embodiments described herein relate to electrochemical cells with dendrite prevention mechanisms, and methods of producing and operating the same. ln some aspects, an electrochemical cell can include an anode and a cathode material disposed on a cathode current collector, the cathode material and the cathode current collector forming a cathode.The electrochemical cell further includes a first separator disposed on the anode, a second separator disposed on the cathode, and an interlayer disposed between the first separator and the second separator, the interlayer including electroactive material, the interlayer including a source of lithium ions, the lithium ions configured to migrate toward the anode upon a voltage difference between the interlayer and the anode exceeding a threshold value. In some embodiments, the anode can include an anode material disposed on an anode current collector. ln some embodiments, the anode material can include graphite, silicon, and / or hard carbon.

A battery pack 100 which has cell units 146, 147 in which top-side and bottom-side battery cells are connected in series, and is capable of switching the connection state of the cell units 146, 147, wherein a control unit 350 monitors voltage imbalances between the plurality of cell units, and also monitors whether or not a cell unit contact failure has occurred. In order to stop a charging / discharging when a contact failure occurs, a signal (abnormality stoppage signal 341 or charging stoppage signal 441) for stopping discharge is produced and outputted to the electrical device body-side.

To provide a battery bank unit that can accurately calculate time required for finishing charging.SOLUTION: A battery bank unit comprises: a first battery bank and a second battery bank that are connected in parallel; and a control device that performs first bank charging to charge only the first battery bank after collective charging in which the first battery bank and the second battery bank are collectively charged, and performs second bank charging to charge only the second battery bank after the first bank charging. The control device calculates residual time for finishing charging of the battery bank unit on the basis of the temperature of the battery bank unit at time of starting the collective charging.SELECTED DRAWING: Figure 5

A method of production of layered composite material packs for use as an electrode by a material bonding process, comprises: • stacking multiple material layers to be bonded on top of each other forming a pack (3), • assembling several packs (3) on top of each other for forming a stack (8), with placing inert interface plates between adjacent packs (3), such that each pack (3) in the stack (8) being separated by an inert interface plate, • placing inert interface plates on the top and the bottom of the stack (8), • placing the stack (8) in between a top (5) and a bottom (4) plate and connecting the top (5) and bottom (4) plates with constraining fixtures (6) for forming a rack (16), whereas the material of the constraining fixtures (6) is so chosen that thermal expansion coefficient of the constraining fixtures (6) is smaller than a value of thermal expansion for the total of the stack (8), • pressing towards each other the top plate (5) and the bottom plate (4) to apply an initial pressing force for bringing all material layers of each pack (3) into firm contact with each other, • placing the rack (16) into a furnace, • heating up the furnace to a bonding temperature for applying heat to the rack (16) with a heating rate between 0.1K / min and 35K / min and applying a connecting pressure due to the difference in thermal expansion coefficients of the stack (8) material and the constraining fixtures (6), • holding the bonding temperature for a predetermined holding time to form a bond via material diffusion in between the material layers, • cooling down the furnace to a temperature below 350°C, • disassembling the stack (8) from the rack (16) and interface plates and removing the bonded packs (3).

A battery control system (1) for controlling a solid-state battery provided with a battery cell (21) having a solid electrolyte and a negative electrode containing lithium, the battery control system (1) being provided with: a measurement means for measuring a surface pressure distribution on the basis of a measured value or an estimated value of the surface pressure distribution on the main surface of the battery cell (21); and a control means for controlling a charge / discharge current, which is a charge current and / or discharge current of the solid-state battery, the control means determining the charge / discharge current on the basis of the upper limit surface pressure difference and the lower limit surface pressure difference. The upper limit surface pressure difference is the difference between the measured value of the surface pressure distribution measured by the measuring unit and the upper limit surface pressure of the battery cell (21), and the lower limit surface pressure difference is the difference between the measured value of the surface pressure distribution measured by the measuring unit and the lower limit surface pressure of the battery cell (21).

A method of production of layered composite material packs for use as an electrode by a material bonding process, comprises: • stacking multiple material layers to be bonded on top of each other forming a pack (3), • assembling several packs (3) on top of each other for forming a stack (8), with placing inert interface plates between adjacent packs (3), such that each pack (3) in the stack (8) being separated by an inert interface plate, • placing inert interface plates on the top and the bottom of the stack (8), • placing the stack (8) in between a top (5) and a bottom (4) plate and connecting the top (5) and bottom (4) plates with constraining fixtures (6) for forming a rack (16), whereas the material of the constraining fixtures (6) is so chosen that thermal expansion coefficient of the constraining fixtures (6) is smaller than a value of thermal expansion for the total of the stack (8), • pressing towards each other the top plate (5) and the bottom plate (4) to apply an initial pressing force for bringing all material layers of each pack (3) into firm contact with each other, • placing the rack (16) into a furnace, • heating up the furnace to a bonding temperature for applying heat to the rack (16) with a heating rate between 0.1K / min and 35K / min and applying a connecting pressure due to the difference in thermal expansion coefficients of the stack (8) material and the constraining fixtures (6), • holding the bonding temperature for a predetermined holding time to form a bond via material diffusion in between the material layers, • cooling down the furnace to a temperature below 350°C, • disassembling the stack (8) from the rack (16) and interface plates and removing the bonded packs (3).

A battery control system (1) controls a solid-state battery including a battery cell (21) having a solid electrolyte and a negative electrode containing lithium. The battery control system includes: a measurement unit that measures a surface pressure distribution from an actual measured value or an estimated value of a surface pressure distribution on a main surface of the battery cell (21); and a control unit that controls a charge / discharge current of the solid-state battery, the charge / discharge current being at least one of a charge current and a discharge current. The control unit determines the charge / discharge current according to an upper-limit surface pressure difference and a lower-limit surface pressure difference, the upper-limit surface pressure difference being a difference between a measured value of the surface pressure distribution measured by the measurement unit and an upper limit surface pressure of the battery cell (21), the lower-limit surface pressure difference being a difference between the measured value of the surface pressure distribution measured by the measurement unit and a lower limit surface pressure of the battery cell (21).

The invention relates to a method for pre-lithiating a lithium-based secondary battery. The battery includes a unit cell group, an electrode busbar, and a counter electrode busbar. Each unit cell comprises an electrode structure, a diaphragm structure and a counter electrode structure. An auxiliary electrode containing lithium metal is connected to the unit cell. A current sink is connected to the electrode bus bar and the auxiliary electrode, the current sink is controlled to conduct a current from the electrode bus bar through the auxiliary electrode, a voltage between the auxiliary electrode and the counter electrode bus bar is periodically detected, an adjustment value of the voltage is periodically determined, and the adjustment value is adjusted. And control the current sink to control the magnitude of the current such that the sum of the voltage and the adjustment value is about 0 volt.

Lithium-ion cell, comprehensive - two opposing working electrodes (12, 14) of different polarity, between which in an electrolyte space (16) a separator (18) is arranged which electronically insulates the working electrodes (12, 14) from each other and is permeable to lithium ions, and - a lithium-containing reservoir electrode (182) which is in electronically insulating, lithium-ion-exchanging contact with the electrolyte space (16), wherein a voltage between the reservoir electrode (182) and the working electrode (12, 14) can be measured and a voltage between the reservoir electrode (182) and the working electrode (12, 14) can be applied by means of a measuring and control circuit (22) connecting the reservoir electrode (182) with at least one of the working electrodes (12, 14). and wherein the reservoir electrode (182), comprising an electrically conductive polymer material (183) onto which a lithium-containing deposit material (184) is deposited, is porous and is arranged between two electronically insulating and lithium-ion permeable insulating layers (181) of the separator (18), characterized by that the application material (184) contains lithium iron phosphate LiFePO4.

The invention relates to a method for pre-lithiating a lithium-based secondary battery. The method includes: (i) charging the lithium-based secondary battery using a charging circuit connected to an electrode busbar and a counter electrode busbar; (ii) stopping using the charging circuit to charge the lithium-based secondary battery when the battery voltage reaches a first voltage; (iii) controlling a current sink connected to the electrode busbar and the auxiliary electrode to conduct a current from the electrode busbar through the auxiliary electrode so as to diffuse lithium from the auxiliary electrode into an electrode active material layer of the lithium-based secondary battery; (iv) stopping controlling the current sink connected to the electrode busbar and the auxiliary electrode to conduct current from the electrode busbar through the auxiliary electrode when the battery voltage reaches a second voltage lower than the first voltage; and (v) repeating steps (i) to (iv). By using the method, the process time and the required equipment can be reduced.