36results about How to "No overcharging" patented technology

The present invention is an automatic equalizing charge device which uses discharging network formed by MOS tube connecting with power resistance in series to replace power switch and bypass flow network formed by it to execute the automatic equalizing charge for series battery group in quick and safe way with in existing equalizing charge technique including series battery group waiting for charge, real time collecting and isolation circuit for battery voltage signal, main control circuit board, contravariant charging power source, patrol inspection and indication circuit of battery voltage,temperature transducer, isolation driving circuit, power source and bypass flow network formed by it.

The invention regards each single battery in cascaded battery set (CBS) as a small heart. Only when each small heart is normal, integral heart combination can work effectively. Based on the comprehension, the invention sets up a control unit for balanced charging and discharging (CUBCD) for each single battery in CBS so as to form one to one mode to control each single battery in CBS. In parallel charging mode, being controlled by CUBCD, the invention charges each single battery. In discharging operation, being monitored by CUBCD, the invention activates inverter circuit to complement charging operation according to magnitude of energy needed by using energy of battery set self if over discharging occurs on a single battery. Harmonizing charging and discharging operations, the invention keeps synchronous charging and discharging operation among batteries so as to guarantee safe operation of system, prolong service life of battery set.

The invention discloses an equalizing charge method and an equalizing charger. The equalizing charge method comprises the following steps: (1) connecting N (N is integer and is more than or equal to 2) single batteries in a battery pack in parallel; (2) independently and quickly charging the N single batteries at the same time; and (3) after the single batteries meet the charge requirement, finishing charging the battery pack. The equalizing charge method of the invention changes the series discharge mode of the single batteries of the battery pack into a parallel mode to independently charge the batteries of the battery pack, thus independently controlling the charge process of the single batteries to ensure equalizing charge for the single batteries. The charger of the invention uses a single chip control center as the core, and simply and precisely realizes independent charge and independent control of the single batteries.

The invention relates to the field of fuel cell system control, in particularly to a control method of a fuel cell system of a hybrid electric vehicle. According to the control method, under the situation that the fuel cell system has no power output on the whole vehicle, a fuel cell is still controlled to output at the set power, wherein the set power is not less than the power for maintaining work of fuel cell accessories, starting of the fuel cell is ensured, by obtaining the actual demanded power of the whole vehicle, the SOC of a power cell, the single body temperature and the single bodyvoltage, the actual demanded power and the steady-state charging power allowed by the power cell are obtained, finally, the set power of the whole vehicle on the fuel cell is obtained, it is ensuredthat the overcharging phenomenon of the power cell is avoided, meanwhile, constant power output of the fuel cell and balance of the SOC of the whole vehicle are ensured, frequent starting-stopping andload varying of the fuel cell are avoided, the life of an electric pile of the fuel cell is prolonged, the durability of the electric pile of the fuel cell and the power cell safety are improved, andoperation is more convenient.

The invention relates to a charging device and a charging method for lithium secondary battery pack, in particular to a charging device and a charging method for lithium secondary battery pack with a battery management system free of overcharge. The charging method of the lithium secondary battery pack provided by the invention combines a series charging and a constant-voltage current-limiting paralleled connection charging. The charging device thereof comprises at least a series charging power source and at least a paralleled connection charging source. The invention can solve the problems of overcharge and inadequate charge of series charging effectively and avoid the disadvantages of high cost, low reliability, low charging efficiency and thick connecting wire of charging power source of paralleled connection charging.

The invention provides a charging protection circuit which is simple in structure, low in cost and capable of effectively leading charging current to other functional devices after a battery is fully charged and is used for capacitor voltage reduction. A reverse switching element, a battery overcharge detection circuit and a battery overcharge shunt circuit are arranged between a rectifying circuit and a battery charging circuit. By means of the charging protection circuit, when the charging battery is fully charged, in other words, when the set electricity storage amount upper limit value is achieved, power supply current is led to circuits of the other functional devices, such as LED display lamps, heaters and small motors or a small part of functional devices, arranged on a product, and therefore the voltage of the charging battery can be lower than or equal to the set value in the charging process. It is ensured that no overcharge phenomenon can happen to the charging battery, the charging battery is effectively protected, and the service life of the charging battery is greatly prolonged. The charging protection circuit is simple in structure, only dozens of small-power components are used, the product performance is improved, and the material cost can be effectively reduced.

The invention discloses an insufficient voltage activating device for a lithium battery and relates to the technical field of lithium battery charging equipment. The insufficient voltage activating device comprises a lithium battery charging management IC (integrated circuit) and an activating circuit, wherein the activating circuit comprises an MCU (micro control unit) and a current-limiting float charging circuit, wherein a control output pin I/O of the MCU is connected with the enabled pin EN of the lithium battery charging management IC, and a third analog quantity input pin AD3 of the MCU is connected with the lithium battery and used for detecting the voltage of the lithium battery; one end of the current-limiting float charging circuit is connected with a power Vin, the other end of the current-limiting float charging circuit is connected with the lithium battery, and a current control end used for controlling the magnitude of current outputted by the current-limiting float charging circuit is connected with an analog quantity output pin DA of the MCU. The insufficient voltage activating device solves the technical problem in the prior art that a lithium battery is inconvenient to activate in the insufficient voltage state. The insufficient voltage activating device can activate the lithium battery in the insufficient voltage state, has high safety and reliability, facilitates prolonging the service life of the lithium battery, and is low in price.

The invention discloses a method for realizing safety mechanism of motor control system based on MCU + CPLD structure, the three-phase current in the stator winding of a motor, Fault FO signal of eachIGBT in three-phase bridge circuit, The bus voltage signals of the DC power supply Udc are input to the control circuit. The signals are processed by the control circuit and output to the MCU and theCPLD/FPGA processor. The MCU and the CPLD/FPGA process these signals together and process the corresponding fault and enter the safety mechanism. Using this scheme to realize the security mechanism,because of the joint redundancy detection mechanism of MCU + CPLD/FPGA, the motor system can still ensure the safety of the whole vehicle and the human body when one side of the hardware failure occurs. Due to the parallel processing mechanism of CPLD/FPAG processor, the response time from fault detection to fault processing is ensured to be at the level of us, while the response time of fault processing of MCU is at the level of ms, which greatly shortens the time to enter the safety mechanism, so that the motor system ensures the safety of the whole vehicle and the person in the shortest time.

The invention discloses a multifunctional charger, which comprises a charging circuit, a compensating circuit, a rectifying loop, an intelligent control system, a compensating contactor 1KM, a charging contactor 2KM, an AC contactor 8KM and a reverse connection relay 9KA, wherein the compensating contactor 1KM and the charging contactor 2KM are subjected to electric interlocking by self auxiliary contact points on the control; when the charging contactor 2KM works, the charging circuit is formed, and when the compensating contactor 1KM works, the compensating circuit is formed; and an PLC (Programmable Logic Controller) module and a PLC host of the intelligent control system are in plugged connection, wherein the PLC host controls connection and disconnection of the compensating contactor 1KM and the charging contactor 2KM so as to realize the conversion between a charging state and a reactive power compensation state of the charger. The multifunctional charger realizes programmable automatic control by adopting an AC/DC current-voltage sensor and the PLC host, realizes the conversion between analog quantity and digital quantity by the PLC module, displays various working states and working parameters by using a touch display screen, realizes man-machine conversation and is high in automation degree.

The invention relates to a battery current-limiting control method for multi-module parallel charging. The charging current of a battery is sampled by a monitoring unit in real time; if the charging current is greater than a first threshold value, the monitoring unit sends out a subtracting instruction; if the charging current is less than a second threshold value, the monitoring unit sends out an adding instruction; and each module adjusts the output current according to the corresponding instructions. According to the battery current-limiting control method, the charging current for the battery is stabilized within a set range without causing a battery overcharging phenomenon; and long-term overcharging of the battery is avoided, so that the battery can be protected and the service life of the battery can be prolonged consequently.

The invention provides a grouping method of organic super-capacitor modules, relating to a super-capacitor manufacturing method. The grouping method comprises the steps of selecting and grouping capacitor cores before assembling the modules, wherein in the step of selecting the capacitor cores, the capacitor cores which are qualified in capacity, voltage and internal resistance are selected, in the step of grouping the capacitor cores, the capacitor cores which are qualified in capacity, voltage and internal resistance are grouped into a plurality of sets, in the process of assembling, the capacitor cores of the same set are assembled into the modules, in the process of grouping, the capacity difference of the capacitor cores of the same set is not beyond 5% of standard capacity, and, after charging and laying aside the capacitor cores for three days, the voltage difference is not more than 0.2 V, and the internal resistance difference is not beyond 1 m omega. By adopting the scheme disclosed by the invention, the consistency of modular monomer capacitor cores can be ensured, so that the circulation service lives of the super-capacitor modules are further prolonged.

The invention discloses a fuel cell control method under a low temperature condition. The method comprises the following steps: acquiring the temperature, SOP and SOC of a power cell; judging the temperature range of the power battery, the SOC and the current allowable SOP, and controlling the fuel battery to start and the power battery to heat; when the temperature of the power battery is lower than a set threshold value or the SOC is smaller than a set threshold value, starting the fuel battery; and controlling the output power of the fuel cell according to the allowable power of the power cell, the power required for heating and the minimum energy consumption power of the vehicle, reducing the capacity of the power cell in a low-temperature environment, not allowing charging, and when the available power of the power cell is limited, preforming comprehensive distribution, and respectively controlling the heating time sequence and limiting the output power of the fuel cell system. The dual-power system is accelerated to quickly enter a normal working state, so that the electric quantity of the power battery can be recovered to a normal control range, the condition of over-discharge is avoided, and the dynamic property of the vehicle is gradually recovered to be normal.

The invention relates to the technical field of energy management, in particular to an energy management technology aiming at a marine direct current hybrid power system, and particularly relates to an energy management method aiming at the marine direct current hybrid power system composed of multiple groups of fuel cells, multiple groups of lithium batteries and a super capacitor. By monitoring information such as bus voltage and residual electric quantity of each power supply, each power supply DC/DC converter in the marine direct-current hybrid power system is controlled, so that the hybrid power system is switched among 11 working modes, flow of energy in the hybrid power supply is timely allocated, the stability of the direct-current bus is ensured, and the service life of the hybrid power supply is prolonged. The hybrid power supply system rapidly tracks load changes, and stable and reliable operation of the whole DC hybrid power system is realized.

The invention discloses a fuel generation type range-extended electric vehicle controller, which comprises a voltage comparison circuit, a mode conversion switching circuit, a vehicle speed-sensing circuit, an engine speed-sensing circuit, a miss control circuit, a rotational speed display circuit, an accelerator control circuit, a voltage-regulating circuit, a generator phase sequence signal pickup circuit, a phase A MOS (metal oxide semiconductor) transistor drive circuit, a phase B MOS transistor drive circuit, a phase C MOS transistor drive circuit and a current-limiting protection circuit, a master control chip is connected with the voltage comparison circuit, the mode conversion switching circuit, the vehicle speed-sensing circuit, the engine speed-sensing circuit, the miss control circuit, the rotational speed display circuit and the accelerator control circuit, a slave control chip is connected with the voltage-regulating circuit, the generator phase sequence signal pickup circuit, the phase A MOS transistor drive circuit, the phase B MOS transistor drive circuit, the phase C MOS transistor drive circuit and the current-limiting protection circuit, and the master control chip is connected with the slave control chip. By means of an intelligent control measure, the controller can automatically start a fuel generator to operate to charge a storage battery when the voltage of the storage battery is low, and after an electric vehicle starts to run, an engine automatically increases the speed. When the storage battery is fully charged, the fuel generator is automatically shut down. Consequently, the controller not only effectively prevents inconvenience and loss brought to a user as the result of the stopping of the electric vehicle on the midway caused by the shortage of the electricity of the storage battery, but also solves the technical problem that the service life of the storage battery is short due to the insufficient voltage of the storage battery, and meanwhile, the controller can meet the requirement of endurance.

The invention discloses an artificial intelligence charging pile. The charging pile comprises a pile body. A sunshade is arranged at the top end of the pile body, and a maintaining and checking door is installed on one side of the pile body. A charging socket opening is formed in one side of the maintaining and checking door, and a light box assembly is arranged in the top end of the charging socket opening. A card reading unit is arranged at the bottom of the light box assembly, and a human-computer interaction interface is arranged on one side of the card reading unit. A running indicating light is arranged on one side of the human-computer interaction interface, and a fault indicating lamp is arranged on one side of the running indicating light. A charging indicating light is arranged on one side of the fault indicating lamp, and an infrared communication port is arranged in one side of the charging indicating light. Through the artificial intelligence charging pile, a battery can be charged fast without being damaged, and does not go wrong before scrapping of an automobile. For an automobile owner, the environment is protected, and money is saved; the artificial intelligence charging pile is simple and easy to use, charging can be completed automatically, the overcharging phenomenon is avoided, the safety and reliability are achieved, and the artificial intelligence charging pile is suitable for application and popularization.

The invention discloses a UPS lithium battery floating charge control circuit, a lithium battery system and a UPS lithium battery charging control method. The UPS lithium battery floating charge control circuit comprises a first input end, a second input end, a first output end, a second output end, a first switch unit, a floating charge resistor and a control unit; the control unit is used for controlling the UPS lithium battery floating charge control circuit to be in a constant charge state or a floating charge state according to the current voltage of the lithium battery, a preset floating charge voltage and a floating charge entering voltage in a charging stage; the first end of the first switch unit is electrically connected with the first input end, the second end of the first switch unit is electrically connected with the first end of the floating charge resistor; the third end of the first switch unit is electrically connected with the first output end; and the resistance value of the floating charge resistor is determined by the preset floating charge voltage, the voltage entering floating charge, the power consumption of the UPS lithium battery floating charge control circuit and a preset formula. According to the UPS lithium battery floating charge control circuit, lithium battery system and the UPS lithium battery charging control method of the embodiment of the invention, the lithium battery can be in a floating charge and non-overcharge state for a long time.

The charging method of the battery comprises the following steps that in the mth charging and discharging cycle, constant-current charging is conducted on the battery with a charging current, and m isany two or more integers of 1, 2, 3,..., x; wherein a first state of charge SOC1 of the battery when the constant current charging stage in any charge-discharge cycle is cut off is the same as a standard state of charge SOC0 (S21); SOCb is smaller than or equal to SOC0 and smaller than or equal to SOCa+k, SOCa is the state of charge or the preset value of the battery when the constant-current charging stage is cut off in the nth charging and discharging cycle, and SOCb is the state of charge or the preset value of the battery when the constant-current charging stage is cut off in the m1th charging and discharging cycle. By adopting the charging method of the battery, the full charging time of the battery can be shortened, the overcharging phenomenon of the battery can be avoided, and theservice life of the battery can be prolonged.

The invention discloses a switch-type peripheral charging circuit and a charging system. The switch-type peripheral charging circuit comprises a switch-type charging chip. The input end of the switch-type charging chip is connected with a direct-current power supply, the output end of the switch-type charging chip is connected with a battery to be charged, and the switch-type charging chip is usedfor carrying out constant-current charging on the battery to be charged when the voltage of the battery to be charged is smaller than a constant-voltage threshold voltage of the switch-type chargingchip. And when the voltage of the battery to be charged is greater than or equal to the constant-voltage threshold voltage of the switch type charging chip, constant-voltage charging is performed on the battery to be charged. The battery to be charged is charged by adopting the switch type charging chip so that a charging heat loss can be effectively reduced, and the charging efficiency of the battery to be charged can be effectively improved. In addition, the phenomenon that the battery to be charged is overcharged due to the fact that the battery to be charged is fully charged can be avoided, and therefore the use loss of the battery to be charged is reduced.

The invention discloses a cabinet power supply method, device and system, and relates to the technical field of servers. A specific embodiment of the method comprises the following steps: acquiring input power of a power supply in a cabinet in real time; when the input power is greater than a preset first power value, starting a backup power supply in the cabinet; and setting the output voltage of the back-up power supply according to the output voltage of the power supply in the cabinet, so that the back-up power supply supplies power to the server. According to the embodiment, the power management controller is additionally arranged in the cabinet to obtain the input power of the power supply in the cabinet in real time, and the power management controller is combined with the back-up power supply in the cabinet to realize power supply by using the power supply and the back-up power supply at the same time under the condition that the input power is greater than the preset power value; therefore, the cabinet is prevented from being overcharged.

The invention provides a magnetizing power source for a magnetic defect detector. The magnetizing power source for the magnetic defect detector comprises an entire chassis, and a charge circuit, a protection circuit, an electric quantity display circuit and a pulse removing circuit arranged in the entire chassis, wherein the charge circuit is connected with the protection circuit; the protection circuit is connected with the electric quantity display circuit; and the protection circuit is connected with the pulse removing circuit. The magnetizing power source for the magnetic defect detector provided by the invention has the beneficial effects of light weight, stable work, over-current protection in an output process, long service life, simplicity of maintenance, safety, reliability, and beautiful appearance.

The invention relates to a new energy automobile power battery deep charging and discharging calibration device, and belongs to the technical field of V2G charging piles, the front end of a calibration device main body is provided with a first connecting column and a second connecting column, the first connecting column is connected with an anti-loosening fixing clamp through a transmission line, a connecting device is inserted into the first connecting column, and the second connecting column is connected with the anti-loosening fixing clamp through a transmission line. The connecting device is connected with the anti-loose fixing clamp through a transmission line, the connecting device rotates around the second connecting column, and one side of the calibration device main body is provided with a storage device for placing a detection part. The method has the beneficial effects that the power battery is deeply charged and discharged once, so that the activity of the battery can be stimulated to the maximum extent, the percentage accuracy of the electric quantity of the battery can be calibrated, the electric quantity of the V2G charging pile for charging the battery is more accurately grasped, and the problem of over-charging or over-discharging of the battery is avoided.