CN105539180A - Control method for electromobile combined power source shaped like Chinese character ''tian'' - Google Patents
Control method for electromobile combined power source shaped like Chinese character ''tian'' Download PDFInfo
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- CN105539180A CN105539180A CN201511000289.8A CN201511000289A CN105539180A CN 105539180 A CN105539180 A CN 105539180A CN 201511000289 A CN201511000289 A CN 201511000289A CN 105539180 A CN105539180 A CN 105539180A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/14—Preventing excessive discharging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/25—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by controlling the electric load
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention belongs to the technical field of energy and power and relates to a control method for an electromobile combined power source shaped like a Chinese character ''tian''. An electronic control unit reads electrical charge states of a first energy storing device and a second energy storing device in real time through a communication bus and controls a first switch and a second switch to be switched on and switched off and a power generation device to be started and stopped according to the electrical charge states of the first energy storing device and the second energy storing device. According to the control method, the process is simple, the principle is reliable, operation is convenient, and the service life is long; power source control is reasonable and efficient, energy consumption is low, and the environment-friendly effect is achieved.
Description
Technical field:
The invention belongs to energy source and power technical field, relate to a kind of matrix pattern electronlmobil AC-battery power source control method, by redistributing power demand, distribute the mode of operation of different closed-center system rationally, make each closed-center system can be operated in the operating mode oneself be applicable to the most as far as possible, realize the optimization of the performances such as the efficiency of transformation of energy or Energy transmission, life-span, cost, reliability.
Background technology:
At present, the battery system of electronlmobil mainly adopts lithium cell, although lithium cell is in the ability adapting to the dynamic power demand that vehicle travels, obviously be better than driving engine, but integral battery door group structure conventional at present or Shortcomings, be mainly reflected in the cost of cell stack designs, life-span, capacity isoparametric conflicting on, no matter be hybrid vehicle, or pure electric automobile, battery pack needs the dynamic part bearing vehicle power demand, for drive motor directly provides the battery pack of energy to be often operated in significantly dynamic mapping operating mode, in existing single integral battery door group project organization, battery must meet this dynamic power demand, lithium cell is existed equally to the problem of an optimum operating condition.If the lithium cell group of electronlmobil is also adopted mixed system, in theory can under the condition meeting power demand, continual mileage, significantly reduce battery pack cost, effective prolongation battery life, but actual count data show, the entrucking practical life of integral battery door group are all starkly lower than the bench life of battery core, possible major cause be wherein battery pack under entrucking environment, the coupling of its mode of operation is unreasonable.The structure forefathers of hybrid energy-storing had done multiple organization plan, comprise lithium cell+super capacitor, lead-acid battery+super capacitor, lithium cell+lead-acid battery, but be the direct modes in parallel of two kinds of closed-center systems substantially, be difficult to reach desirable effect, this is because both voltage platforms remain consistent due to direct parallel connection, fundamentally cannot realize both mode of operation decoupling zeros, optimum while also just can not realizing both operating modes completely.
Summary of the invention:
The object of the invention is to the shortcoming overcoming prior art existence; seek design and a kind of matrix pattern electronlmobil AC-battery power source control method is provided; realize closed-center system electric energy by the reasonable switching of two groups of closed-center systems to export overcharging under not interrupt condition, cross and put and the function such as temperature protection; by carrying out isolation switching controls to two groups of closed-center systems; effectively can improve the estimation precision of system status parameters, and effective recycling regenerating braking energy.
To achieve these goals, the present invention realizes in matrix pattern electronlmobil hybrid power supply, electronic control unit reads charged (SOC) state of the first closed-center system and the second closed-center system in real time by communication bus, control the conducting of the first switch and second switch and the open and close of shutoff and power generation assembly according to both state-of-charges, concrete steps are:
(1), by direct current charge-discharge interface, electronic control unit judges whether whole device is in charge condition, if charge condition, enter step (2) charging cycle, if not charge condition, enter step (3) discharge cycles;
(2) charging cycle:
The first step: close power generation assembly;
Second step, judge whether SOC32 is greater than SOC32max, if SOC32>SOC32max, electronic control unit exports the pwm control signal of the first switch and second switch, make D52>U31/ (U31+U32), the electric energy transfer of the second closed-center system is to the first closed-center system;
3rd step, judges whether SOC31 is greater than SOC31max, if SOC31>SOC31max, electronic control unit exports control signal, all turns off the first switch and second switch, and charging terminates; If SOC31<SOC31max, return second step, circulate successively;
(3) discharge cycles:
The first step, judges the state-of-charge of the second closed-center system, if SOC32>SOC32max, closes power generation assembly; If SOC32<SOC32min, open power generation assembly; If SOC32max>SOC32>SOC32min, keep power generation assembly state constant; Respectively to the first closed-center system and the charging of the second closed-center system when power generation assembly is opened, the outgoing current of power generation assembly is more than or equal to the average output current of electric machine controller;
Second step, judge the state-of-charge of the first closed-center system, if SOC31>SOC31max, electronic control unit exports the pwm control signal of the first switch and second switch, make D52<U31/ (U31+U32), make the electric energy transfer of the first closed-center system to the second closed-center system; If SOC31<SOC31min, electronic control unit exports the pwm control signal of the first switch and second switch, make D52>U31/ (U31+U32), make the electric energy transfer of the second closed-center system to the first closed-center system, and the electric energy transfer of the second closed-center system is more than or equal to the average output current of electric machine controller to the electric current of the first closed-center system; If SOC31max>SOC31>SOC31min, then close the first switch and second switch; Wherein SOC31 is the SOC of the first closed-center system, SOC31min is the minimum SOC of the first closed-center system, SOC31max is the maximum SOC of the first closed-center system, SOC32 is the SOC of the second closed-center system, the maximum SOC of SOC32min to be minimum SOC, the SOC32max of the second closed-center system be the second closed-center system; U31 is the voltage of the first closed-center system, and U32 is the voltage of the second closed-center system; D52 is the control dutycycle of second switch, D52=T52on/ (T52on+T52off), and in formula, T52on is the conduction duration of second switch, and T52off is the shutoff time length of second switch.
The agent structure of matrix pattern electronlmobil hybrid power supply of the present invention comprises drive motor, electric machine controller, the first closed-center system, the second closed-center system, inductance, the first switch, second switch, power generation assembly, electronic control unit, direct current charge-discharge interface, the first point of connection, the second point of connection, communication bus and control line; First switch and second switch are connected in series, and are provided with the first point of connection between the first switch and second switch, and second switch is connected with the negative pole of the second closed-center system, and the first switch is connected with the positive pole of the first closed-center system; First closed-center system and the second closed-center system are connected in series, the negative pole of the first closed-center system is electrically connected with the positive pole of the second closed-center system, be provided with point of connection between first closed-center system and the second closed-center system, one end of inductance is connected with the first point of connection, and the other end is connected with the second point of connection; The positive pole of the first closed-center system inputs positive pole with the positive pole of power generation assembly and the direct current of electric machine controller respectively and is electrically connected; The negative pole of the second closed-center system is connected with the negative electricity of power generation assembly, and the positive pole of the second closed-center system is connected with the direct current input negative electricity of electric machine controller; The mouth of electric machine controller is electrically connected with drive motor; Positive terminal and the negative terminal of direct current charge-discharge interface are connected positive pole and the negative pole of the second closed-center system respectively; Electronic control unit is connected with the first closed-center system, the second closed-center system, power generation assembly and direct current charge-discharge interface respectively by communication bus and carries out status data exchange, and controls power generation assembly outgoing current; Electronic control unit is connected with the first switch and second switch respectively by control line, controls conducting and the shutoff of the first switch and second switch.
First switch of the present invention and second switch are field effect transistor, insulated gate bipolar transistor (IGBT) or other types solid switch device; First closed-center system is DC power type closed-center system, comprise dynamic lithium battery group or super capacitor etc., second closed-center system is DC energy storage type battery pack, comprise the accumulation energy type batteries such as energy-storage lithium battery group or lead-acid battery, power generation assembly is the power output device that direct current exports, and comprises internal combustion engine generator group or fuel cell.
Electronic control unit of the present invention controls the first switch, second switch is operated in rp state or whole off state, and namely during the first switch conduction, second switch turns off; During the first switch OFF, second switch conducting; Or first switch and second switch turn off simultaneously.
The present invention compared with prior art, have the following advantages: one is the reasonable switching of electronlmobil hybrid power supply by two groups of closed-center systems, realize battery pack electric energy in closed-center system and export the functions such as over-charge protective, Cross prevention and temperature protection under not interrupt condition, efficiently solve the defencive functions such as single closed-center system is put owing to overcharging, excessively, temperature and electric energy output must be cut off, having a strong impact on the problem of traffic safety; Two is that this device mates adaptation load power demand by power take-off module, and effective reclaiming braking energy, significantly can reduce the capacity requirement of the closed-center system mated; Three is that its closed-center system can realize shallowly filling shallow putting, and increases substantially battery life; Four is that two groups of closed-center systems are under the condition not affecting Power output, can by isolating input, the output of electric energy individually or simultaneously, reduce or eliminate the impact of external factor on battery, improve the survey precision of correlated variables, thus significantly improve the estimation precision of closed-center system state parameter, make the management of closed-center system system and control process more reasonable, efficient; Its technique is simple, and principle is reliable, easy to operate, long service life, and Energy control is rationally efficient, less energy consumption, environmental friendliness.
Accompanying drawing illustrates:
Fig. 1 is the agent structure circuit theory schematic diagram of matrix pattern electronlmobil hybrid power supply of the present invention.
Detailed description of the invention:
Below by embodiment, also the invention will be further described by reference to the accompanying drawings.
Embodiment:
The present embodiment to the principle of work that electronlmobil AC-battery power source controls is: electronic control unit 7 reads charged (SOC) state of the first closed-center system 31 and the second closed-center system 32 in real time by communication bus, control the conducting of the first switch 51 and second switch 52 and the open and close of shutoff and power generation assembly 6 according to both state-of-charges, concrete steps are:
(1), by direct current charge-discharge interface 8, electronic control unit 7 judges whether whole device is in charge condition, if charge condition, enter step (2) charging cycle, if not charge condition, enter step (3) discharge cycles;
(2) charging cycle:
The first step: close power generation assembly 6;
Second step, judge whether SOC32 is greater than SOC32max, if SOC32>SOC32max, electronic control unit 7 exports the pwm control signal of the first switch 51 and second switch 52, make D52>U31/ (U31+U32), the electric energy transfer of the second closed-center system 32 is to the first closed-center system 31;
3rd step, judges whether SOC31 is greater than SOC31max, if SOC31>SOC31max, electronic control unit 7 exports control signal, all turns off the first switch 51 and second switch 52, and charging terminates; If SOC31<SOC31max, return second step, circulate successively;
(3) discharge cycles:
The first step, judges the state-of-charge of the second closed-center system 32, if SOC32>SOC32max, closes power generation assembly 6; If SOC32<SOC32min, open power generation assembly 6; If SOC32max>SOC32>SOC32min, keep power generation assembly 6 state constant; When power generation assembly 6 is opened, respectively the first closed-center system 31 and the second closed-center system 32 are charged with constant current A6, and charging current A6 is more than or equal to the average output current A2outavg of electric machine controller 2;
Second step, judge the state-of-charge of the first closed-center system 31, if SOC31>SOC31max, electronic control unit 7 exports the pwm control signal of the first switch 51 and second switch 52, make D52<U31/ (U31+U32), make the electric energy transfer of the first closed-center system 31 to the second closed-center system 32; If SOC31<SOC31min, electronic control unit 7 exports the pwm control signal of the first switch 51 and second switch 52, make D52>U31/ (U31+U32), make the electric energy transfer of the second closed-center system 32 to the first closed-center system 31, and transfer current A32_31 is more than or equal to the average output current A2outavg of electric machine controller 2; If SOC31max>SOC31>SOC31min, then close the first switch 51 and second switch 52; Wherein SOC31 is the SOC of the first closed-center system 31, SOC31min is the minimum SOC of the first closed-center system 31, SOC31max is the maximum SOC of the first closed-center system 31, SOC32 is the SOC of the second closed-center system 32, maximum SOC, the A6 of SOC32min to be minimum SOC, the SOC32max of the second closed-center system 32 be the second closed-center system 32 are the outgoing current of power generation assembly 6, A2outavg is that drive motor 1 is operated in electric motor state, the average output current of electric machine controller 2; U31 is the voltage of the first closed-center system 31, and U32 is the voltage of the second closed-center system 32; D52 is the control dutycycle of second switch 52, D52=T52on/ (T52on+T52off), and in formula, T52on is the conduction duration of second switch 52, and T52off is the shutoff time length of second switch 52.
The agent structure of matrix pattern electronlmobil hybrid power supply described in the present embodiment as shown in Figure 1, comprise drive motor 1, electric machine controller 2, first closed-center system 31, second closed-center system 32, inductance 4, first switch 51, second switch 52, power generation assembly 6, electronic control unit 7, direct current charge-discharge interface 8, first point of connection 91, second point of connection 92, communication bus 10 and control line 11; First switch 51 and second switch 52 are connected in series, and are provided with the first point of connection 91 between the first switch 51 and second switch 52, and second switch 52 is connected with the negative pole of inductance 4 second closed-center system 32, and the first switch 51 is connected with the positive pole of the first closed-center system 31; First closed-center system 31 and the second closed-center system 32 are connected in series, the negative pole of the first closed-center system 31 is electrically connected with the positive pole of the second closed-center system 32, point of connection is provided with between first closed-center system 31 and the second closed-center system 32, one end of inductance 4 is connected with the first point of connection 91, and the other end is connected with the second point of connection 92; The positive pole of the first closed-center system 31 inputs positive pole with the positive pole of power generation assembly 6 and the direct current of electric machine controller respectively and is electrically connected; The negative pole of the second closed-center system 32 is connected with the negative electricity of power generation assembly 6, and the positive pole of the second closed-center system 32 is connected with the direct current input negative electricity of electric machine controller 2; The output of electric machine controller 2 is electrically connected with drive motor 1; Positive terminal and the negative terminal of direct current charge-discharge interface 8 are connected positive pole and the negative pole of the second closed-center system 32 respectively; Electronic control unit 7 is connected with the first closed-center system 31, second closed-center system 32, power generation assembly 6 and direct current charge-discharge interface 8 respectively by communication bus 10 and carries out status data exchange, and controls power generation assembly 6 outgoing current; Electronic control unit 7 is connected with the first switch 51 and second switch 52 respectively by control line 11, controls conducting and the shutoff of the first switch 51 and second switch 52.
First switch 51 described in the present embodiment and second switch 52 are field effect transistor, insulated gate bipolar transistor (IGBT) or other types solid switch device; First closed-center system 31 is DC power type closed-center system, comprise dynamic lithium battery group or super capacitor etc., second closed-center system 32 is DC energy storage type battery pack, comprise the accumulation energy type batteries such as energy-storage lithium battery group or lead-acid battery, the power output device that power generation assembly 6 exports for direct current, comprises internal combustion engine generator group or fuel cell.
Electronic control unit 7 described in the present embodiment controls the first switch 51, second switch 52 is operated in rp state or whole off state, and namely during the first switch 51 conducting, second switch 52 turns off; When first switch 51 turns off, second switch 52 conducting; Or first switch 51 and second switch 52 turn off simultaneously.
Claims (3)
1. a matrix pattern electronlmobil AC-battery power source control method, it is characterized in that realizing in matrix pattern electronlmobil hybrid power supply, electronic control unit reads the state-of-charge of the first closed-center system and the second closed-center system in real time by communication bus, control the conducting of the first switch and second switch and the open and close of shutoff and power generation assembly according to both state-of-charges, concrete steps are:
(1), by direct current charge-discharge interface, electronic control unit judges whether whole device is in charge condition, if charge condition, enter step (2) charging cycle, if not charge condition, enter step (3) discharge cycles;
(2) charging cycle:
The first step: close power generation assembly;
Second step, judge whether SOC32 is greater than SOC32max, if SOC32>SOC32max, electronic control unit exports the pwm control signal of the first switch and second switch, make D52>U31/ (U31+U32), the electric energy transfer of the second closed-center system is to the first closed-center system;
3rd step, judges whether SOC31 is greater than SOC31max, if SOC31>SOC31max, electronic control unit exports control signal, all turns off the first switch and second switch, and charging terminates; If SOC31<SOC31max, return second step, circulate successively;
(3) discharge cycles:
The first step, judges the state-of-charge of the second closed-center system, if SOC32>SOC32max, closes power generation assembly; If SOC32<SOC32min, open power generation assembly; If SOC32max>SOC32>SOC32min, keep power generation assembly state constant; Respectively to the first closed-center system and the charging of the second closed-center system when power generation assembly is opened, the outgoing current of power generation assembly is more than or equal to the average output current of electric machine controller;
Second step, judge the state-of-charge of the first closed-center system, if SOC31>SOC31max, electronic control unit exports the pwm control signal of the first switch and second switch, make D52<U31/ (U31+U32), make the electric energy transfer of the first closed-center system to the second closed-center system; If SOC31<SOC31min, electronic control unit exports the pwm control signal of the first switch and second switch, make D52>U31/ (U31+U32), make the electric energy transfer of the second closed-center system to the first closed-center system, and the electric energy transfer of the second closed-center system is more than or equal to the average output current of electric machine controller to the electric current of the first closed-center system; If SOC31max>SOC31>SOC31min, then close the first switch and second switch; Wherein SOC31 is the SOC of the first closed-center system, SOC31min is the minimum SOC of the first closed-center system, SOC31max is the maximum SOC of the first closed-center system, SOC32 is the SOC of the second closed-center system, the maximum SOC of SOC32min to be minimum SOC, the SOC32max of the second closed-center system be the second closed-center system; U31 is the voltage of the first closed-center system, and U32 is the voltage of the second closed-center system; D52 is the control dutycycle of second switch, D52=T52on/ (T52on+T52off), and in formula, T52on is the conduction duration of second switch, and T52off is the shutoff time length of second switch.
2. matrix pattern electronlmobil AC-battery power source control method according to claim 1, is characterized in that the agent structure of described matrix pattern electronlmobil hybrid power supply comprises drive motor, electric machine controller, the first closed-center system, the second closed-center system, inductance, the first switch, second switch, power generation assembly, electronic control unit, direct current charge-discharge interface, the first point of connection, the second point of connection, communication bus and control line; First switch and second switch are connected in series, and are provided with the first point of connection between the first switch and second switch, and second switch is connected with the negative pole of the second closed-center system, and the first switch is connected with the positive pole of the first closed-center system; First closed-center system and the second closed-center system are connected in series, the negative pole of the first closed-center system is electrically connected with the positive pole of the second closed-center system, be provided with point of connection between first closed-center system and the second closed-center system, one end of inductance is connected with the first point of connection, and the other end is connected with the second point of connection; The positive pole of the first closed-center system inputs positive pole with the positive pole of power generation assembly and the direct current of electric machine controller respectively and is electrically connected; The negative pole of the second closed-center system is connected with the negative electricity of power generation assembly, and the positive pole of the second closed-center system is connected with the direct current input negative electricity of electric machine controller; The mouth of electric machine controller is electrically connected with drive motor; Positive terminal and the negative terminal of direct current charge-discharge interface are connected positive pole and the negative pole of the second closed-center system respectively; Electronic control unit is connected with the first closed-center system, the second closed-center system, power generation assembly and direct current charge-discharge interface respectively by communication bus and carries out status data exchange, and controls power generation assembly outgoing current; Electronic control unit is connected with the first switch and second switch respectively by control line, controls conducting and the shutoff of the first switch and second switch.
3. matrix pattern electronlmobil AC-battery power source control method according to claim 2, it is characterized in that described first switch and second switch comprise field effect transistor, insulated gate bipolar transistor; First closed-center system is DC power type closed-center system, comprise dynamic lithium battery group or super capacitor, the second closed-center system is DC energy storage type battery pack, comprises energy-storage lithium battery group or lead-acid battery, power generation assembly is the power output device that direct current exports, and comprises internal combustion engine generator group or fuel cell.
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