40results about How to "Uniform charge and discharge" patented technology

The invention relates to a charging system of low-voltage batteries of an electric automobile and a charging method of the charging system of the low-voltage batteries of the electric automobile. The charging system of the low-voltage batteries of the electric automobile comprises a main control loop, a voltage sampling loop, a power battery pack, auxiliary loop control switches, auxiliary loop gating switches, a transformer and main loop control switches, wherein the output end of the main control loop is connected with the auxiliary loop switches and the main loop control switches, the input end of the voltage sampling loop is connected with the power battery pack and the output end of the main control loop, the output end of the voltage sampling loop is connected with the input end of the main control loop, the low-voltage batteries are connected with the transformer through the main loop control switches, and the power battery pack is connected with the transformer through the auxiliary loop switches. The charging method of the low-voltage batteries of the electric automobile comprises the steps that sampling analysis is carried out on voltage values of batteries of the power battery pack, discharging is carried out on the batteries with high voltage, and charging is carried out on the batteries with low voltage. Mutual transfer between energy of the low-voltage batteries and energy of the power battery pack is achieved, and energy balance of the power battery pack is ensured.

The invention discloses a control method and a device for achieving equalizing charge of a battery pack and a battery box. The control method for achieving the equalizing charge of the battery pack comprises periodically checking battery status signals of the battery pack, wherein the battery status signals comprise a battery state of charge (SOC), internal resistance, a voltage, a current and / or temperature, judging whether batteries in the battery pack need conducting equalizing charge or not according to the battery status signals, and if the batteries need conducting the equalizing charge, then the equalizing charge is conducted to the batteries through an equalization unit connected with the batteries. According to the control method and the device for achieving the equalizing charge of the battery pack and the battery box, the battery status signals such as the battery SOC, the internal resistance, the voltage, the current, the temperature and the like can be combined, the actual state equilibrium of the batteries is achieved, a switch topological structure and control are high in efficient and stability, the size of a magnetic element is greatly reduced, and achieving by using an integrated circuit can be easily achieved.

The invention relates to the technical field of charging and discharging protection for lithium batteries, in particular to a power module management system and method for lithium batteries. The power module management system and method are used for managing the power module formed by the lithium batteries; the power module comprises a plurality of battery packs, a power module management unit and a charger; each battery pack is formed by connecting a plurality of battery pieces in series; each battery piece comprises a single battery or a plurality of single batteries; each battery piece is connected with a first change-over switch in parallel; the first change-over switches in each battery pack form a switch array; each switch array is connected with a battery pack control unit; the battery pack control unit can monitor state parameters of charging and discharging states of the battery pieces and can send out a corresponding drive signal to control one first change-over switch in one switch array to change the state, so that the corresponding battery piece is shifted out of a charge and discharge loop; the power module management unit is connected with the battery pack control unit; the charger is connected with the power module management unit; and the power module management unit generates an instruction according to the state parameters, and controls the charger to adjust the charging mode and the charging current magnitude.

The invention provides a charge-discharge system and a charge-discharge method for a mobile power supply. The charge-discharge system comprises a load detection unit, a charge unit, a discharge unit and a control unit, wherein the load detection unit is used for detecting whether the mobile power supply is connected with a load or not; the charge unit is used for outputting a charge current to charge the battery of the mobile power supply; the discharge unit is used for outputting a discharge current to discharge to the load; and the control unit is used for receiving an input current and adjusting the charge current output by the charge unit and the discharge current output by the discharge unit according to the magnitude of the input current and the discharge current. Therefore, a beneficial effect of synchronous charging and discharging, and the balancing of the charge-discharge currents is realized.

A dry homogenization process for positive electrode slurry of lithium iron phosphate start-stop battery and the prepared slurry, including: S1) putting the dry powder into the mixing tank, and controlling the temperature during the stirring process; S2) wetting stage: mixing to step S1) Add conductive paste to the dry powder, put the conductive paste in 4-6 times; S3) kneading stage: after the last feeding of the conductive paste, add solvent to adjust the solid content of the paste in the mixing tank to 66%-68% Carry out kneading, and gradually increase the revolution speed and dispersion speed; S4) The solvent is added to the mixing tank at one time, and the stirring is continued. The invention improves the particle agglomeration of the slurry and reduces the fineness of the slurry; the slurry kneaded under the condition of high solid content is beneficial to disperse the material evenly under the action of high shear force, so that the high-rate battery can be charged and discharged More uniform, thereby greatly improving the rate charge and discharge performance and service life of the battery. In addition, the invention shortens the homogenization cycle to 4.5-5.5h.