CN114094667A - Control system for controlling charging voltage and current of shared charger - Google Patents

Control system for controlling charging voltage and current of shared charger Download PDF

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Publication number
CN114094667A
CN114094667A CN202111397235.5A CN202111397235A CN114094667A CN 114094667 A CN114094667 A CN 114094667A CN 202111397235 A CN202111397235 A CN 202111397235A CN 114094667 A CN114094667 A CN 114094667A
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module
resistor
port
voltage
inverter
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张剑
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Hangzhou Donghi Information Technology Co ltd
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Hangzhou Donghi Information Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F17/00—Coin-freed apparatus for hiring articles; Coin-freed facilities or services
    • G07F17/0042—Coin-freed apparatus for hiring articles; Coin-freed facilities or services for hiring of objects
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H02J7/00716—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to integrated charge or discharge current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

The invention discloses a control system for controlling the magnitude of charging voltage and current of a shared charger, which belongs to the technical field of shared chargers and comprises a voltage and current sampling module, a DSP (digital signal processor) control module, a driving module and a power supply module, wherein the voltage and current sampling module, the DSP control module and the power supply module are arranged in a charging cabinet; and the power supply module is used for providing a working power supply for the voltage and current sampling module, the DSP control module and the driving module. The invention influences an inversion module in a charging system of the charging cabinet to achieve the purpose of controlling output voltage and current, thereby realizing the effect of stably and quickly charging the storage battery in the shared charger bank and further meeting the lease application scene of the shared charger bank.

Description

Control system for controlling charging voltage and current of shared charger
Technical Field
The invention relates to the technical field of shared power banks, in particular to a control system for controlling the charging voltage and current of a shared power bank.
Background
The shared charging treasure refers to charging lease equipment provided by an enterprise, a user uses a mobile device to scan a two-dimensional code on a screen of equipment to deliver a deposit, so that the charging treasure can be leased, and after the charging treasure is successfully returned, the deposit can be brought back at any time and returned to an account of the user. The shared treasured that charges that current public occasion (like tourist attraction, shopping mall, airport, railway station etc.) was placed leases equipment facility adopts and to concentrate the treasured mode that charges in the treasured position of keeping in storage that charges of cabinet. When the shared charger baby needs to be charged, the shared charger baby is returned to the charging cabinet, and the charging cabinet charges the storage battery of the charger baby.
At present, a charging system for charging a shared charger bank in a charging cabinet mainly comprises an input rectifying and filtering module, an inverter module and an output rectifying module, wherein 220V mains supply is connected into the charging cabinet, and then forms direct current through rectification and filtering of the input rectifying and filtering module, then forms alternating current through high-frequency voltage transformation of the inverter module, and finally outputs required voltage and current to charge a storage battery of the shared charger bank after rectification and filtering of the output rectifying and filtering module. The inverter module usually adopts a full-bridge inverter circuit, and includes four power switching tubes Q1, Q2, Q3, and Q4, and a capacitor is connected in parallel to each of the four power switching tubes, and through this capacitor, zero-voltage turn-on and turn-off of the power switching tubes are realized in the circuit.
The charging system adopts a constant-voltage charging mode, although the mode is simpler, and the charging system does not have too many bubbles in the charging process, thereby ensuring that the performance of the polar plate cannot be greatly influenced and the energy consumption is lower. However, the disadvantage is also obvious, namely, in the initial charging stage, the storage battery may be damaged due to the over-current caused by the over-current of the charging current, and the charging takes longer time caused by the small selection of the charging voltage, which is difficult to adapt to the rental application scenario of the shared charger.
Therefore, a voltage and current control means is needed to be added into the charging system to meet the requirement of stable and quick charging of the shared charger, so that the shared charger is fully adapted to the rental application scene, and the use experience degree of the shared charger is improved.
Disclosure of Invention
The invention aims to provide a control system for controlling the charging voltage and current of a shared charger, and aims to solve the problem that the charging system of the existing charging cabinet is difficult to realize the requirement of stable and quick charging of the shared charger.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a control system for controlling sharing treasured that charges voltage and electric current size, is including setting up voltage and current sampling module, DSP control module, drive module, the power module in the cabinet that charges, wherein:
the voltage and current sampling module is used for collecting charging voltage and current signals output by the charging cabinet to the shared charger storage battery and feeding the charging voltage and current signals back to the DSP control module, and the DSP control module controls the driving circuit according to the feedback information to influence an inversion module in a charging system of the charging cabinet and realize control of the magnitude of output voltage and current; and the power supply module is used for providing a working power supply for the voltage and current sampling module, the DSP control module and the driving module.
Furthermore, the invention also comprises a system protection module which is simultaneously connected with the DSP control module and the power supply module.
Still further, the system protection module comprises an overvoltage and undervoltage protection module and an overcurrent protection module which are both connected with the DSP control module.
Specifically, the overvoltage and undervoltage protection module comprises a logic gate chip with the model number of SN74LVC1G00DCKR and a first inverter with the model number of LM 339N; the Y port of the logic gate chip is connected with the DSP control module through a resistor R6 and is connected with the power module through a resistor R7, and meanwhile, one end of a resistor R7 is also sequentially grounded through diodes D8 and D9; the VCC port of the logic gate chip is connected with the power module; pins 1 and 2 of the first inverter are connected with an A port of the logic gate chip, and a resistor R8 is also connected in series between the pins 2 and 3 of the first inverter; the pin 5 is sequentially connected with the power module through resistors R9 and R10, and one end of the resistor R10 is also sequentially grounded through resistors R12 and R14; pin 7 is connected with pin 4 and is connected with a direct current bus through a resistor R11; pin 6 is connected to resistor R14 through resistor R13 and to ground.
Specifically, the overcurrent protection module comprises a second inverter with the model number of LM339ADR, a capacitor C7 with one end connected with a pin 5 of the second inverter and the other end grounded, a resistor R16 with one end connected with the power supply module and the other end connected with a pin 2 of the second inverter, and a resistor R17 with one end connected with a pin 4 of the second inverter and the other end grounded; the pin 2 of the second inverter is connected with the DSP control module through a resistor R15; a pin 4 of the second inverter is connected with the power module through a resistor R18, and a pin 3 is connected with the power module; pin 5 is connected with a direct current bus through a resistor R19; one end of the resistor R16 is grounded through the diodes D10 and D11 in sequence.
Specifically, the driving module comprises a driving chip with the model number of IR2110, a resistor R4 with one end connected to the HO port of the driving chip and the other end connected to the inverter module in the charging cabinet charging system, a capacitor C1 with one end connected to the VB port of the driving chip and the other end connected to the inverter module in the charging cabinet charging system, a resistor R3 with one end connected to the LO port of the driving chip and the other end connected to the inverter module in the charging cabinet charging system, a diode D3 connected to two ends of the resistor R4, and a diode D5 connected to two ends of the resistor R3; the VCC port, the VDD port, the VSS port and the VB port of the driving chip are all connected with a power module; and the HIN port and the LIN port of the driving chip are both connected with the DSP control module.
Further, the driving module further includes a negative bias module, which includes a capacitor C2 and a diode D4 connected in parallel between the VS port of the driving chip and the inverter module in the charging cabinet charging system, and a capacitor C4 and a diode D6 connected in parallel and grounded to each other and connected to the VCC port of the driving chip.
Still further, the VB port of the driving chip is connected with the power module through a diode D7.
Furthermore, capacitors C5 and C6 which are connected in parallel with each other and are grounded are connected between the VDD port and the VCC port of the driving chip at the same time.
Furthermore, a diode D1 and a resistor R2 which are connected in parallel are connected between the HO port and the VB port of the driving chip in series; and a diode D2 and a resistor R1 which are mutually connected in parallel are connected in series between the VCC port and the LO port of the driving chip.
The invention has the following beneficial effects:
(1) according to the invention, the DSP control module is taken as a core, the design of the voltage and current sampling module and the driving module is matched, a constant-current-first-constant-voltage charging mode is adopted, the purpose of controlling the output voltage and current is achieved by acquiring the voltage and current information output by the charging system and then controlling the driving module to work to influence the inversion module in the charging system of the charging cabinet, so that the effect of stably and quickly charging the storage battery in the shared charger bank is realized, the renting application scene of the shared charger bank is further met, and the use experience of the shared charger bank is improved.
(2) The driving module designed by the invention carries out circuit design by taking the IR2110 driving chip as a core, and has the advantages of convenient driving and simple circuit structure; meanwhile, the negative bias module is arranged in the driving module, so that the phenomenon that the power switch tube in the inverter module is conducted by mistake can be well avoided, the power switch tube is protected, and the normal work of a charging system circuit is ensured.
(3) The invention also sets a system protection module which is divided into overvoltage and undervoltage protection and overcurrent protection, and is matched with the DSP control module, when the charging system circuit has undervoltage, overvoltage and overcurrent, the circuit can be automatically cut off by utilizing the circuit design and the working principle of the overvoltage and undervoltage protection module and the overcurrent protection module and combining the PDPINTA control of the DSP control module, thereby realizing the protection of the system.
(4) The circuit of the invention has reasonable design and stable and reliable performance, and provides good guarantee for the charging of the shared charger bank, therefore, the invention is very suitable for being applied to the charging cabinet matched with the shared charger bank.
Drawings
FIG. 1 is a schematic block diagram of a system of an embodiment of the present invention.
FIG. 2 is a schematic diagram of an application of an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a driving module according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of an under-voltage and over-voltage protection module according to an embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of an overcurrent protection module according to an embodiment of the present invention.
Detailed Description
The invention provides a control system which is used for controlling the voltage and the current output by a charging system in a charging cabinet so as to achieve the purpose of stable and quick charging of a shared charger. The invention is further illustrated by the following description and examples in conjunction with the accompanying drawings.
Examples
As shown in fig. 1, the system frame of the control system according to this embodiment mainly includes a voltage and current sampling module, a DSP control module, a driving module, a power supply module, and a system protection module, which are disposed in the charging cabinet.
The voltage and current sampling module is used for collecting charging voltage and current signals output by the charging cabinet to the shared charger storage battery and feeding the charging voltage and current signals back to the DSP control module, and the DSP control module controls the driving circuit according to the feedback information to influence the inverter module in the charging system of the charging cabinet, so as to control the magnitude of the output voltage and current, and an application example of this embodiment is shown in fig. 2. The system protection module is used for protecting the whole circuit. And the power supply module is used for providing a working power supply for the voltage and current sampling module, the DSP control module, the driving module and the system protection module. The model of the DSP control module in the embodiment adopts DSPTMS320F 2812.
The voltage and current sampling module comprises an output voltage acquisition module and an output current acquisition module which are both connected with the DSP control module. In this embodiment, the output voltage acquisition module adopts the hall voltage sensor to realize voltage acquisition, and the output current acquisition module hall current sensor realizes current acquisition.
As shown in fig. 3, the driving module includes a driving chip of type IR2110, a resistor R4 having one end connected to the HO port of the driving chip and the other end connected to the inverter module in the charging cabinet charging system, and a diode D3 connected in parallel to the resistor R4, a capacitor C1 having one end connected to the VB port of the driving chip and the other end connected to the inverter module in the charging cabinet charging system, a resistor R3 having one end connected to the LO port of the driving chip and the other end connected to the inverter module in the charging cabinet charging system, a diode D5 connected in parallel to the resistor R3, a capacitor C3 having one end connected to the VCC port of the driving chip and the other end connected to ground, a diode D1 and a resistor R2 connected in parallel to each other in series between the HO port and the VB port of the driving chip, a diode D2 and a resistor R1 connected in parallel to each other in series between the VCC port and the LO port of the driving chip and a capacitor C5 connected in parallel to each other and ground in series between the VCC port and the VCC port, C6. The VCC port, VDD port and VSS port of the driving chip are all connected with the power module, and the VB port is connected with the power module through a diode D7. Meanwhile, the HIN port and the LIN port of the driving chip are both connected with the DSP control module.
In the circuit, the capacitance values of the capacitors C1-C6 are 1uF, 100nF, 10uF, 100nF and 10uF respectively; the resistances of the resistors R1-R5 are respectively 10K, 10K and 2K.
The driving module that this embodiment set up uses IR2110 driver chip to carry out circuit design as the core, and not only the drive is convenient, circuit structure is simple moreover.
In addition, in some special cases, when the power switch tube in the inverter module is turned off, dv/dt between the collector and the emitter of the power switch tube becomes large, which transfers charges to the gate through the capacitor, so that the gate voltage becomes large, which is usually larger than the lowest voltage at which the gate of the power switch tube in the inverter module is turned on, resulting in misconduction of the power switch tube, and in severe cases, the power switch tube may be damaged, resulting in abnormal operation of the circuit. Therefore, in order to avoid this problem, in this embodiment, a negative bias module is further disposed in the driving module, and the negative bias module includes a capacitor C2 and a diode D4 connected between the VS port of the driving chip and the inverter module in the charging cabinet charging system and connected in parallel with each other, and a capacitor C4 and a diode D6 connected to the VCC port of the driving chip and connected in parallel with each other and connected to ground.
Taking the application scenario shown in fig. 2 as an example, when the VCC supplies power to the power module, the power module divides the voltage and inputs the voltage into the driving module. When the circuit works normally, the voltage of the capacitor C2 keeps 5V, and the voltage of the emitter of the Q1 is 5V. When an input signal of an HIN port of the driving chip is at a high level, the HO port outputs 20V, the grid voltage of Q1 is 15V and is greater than the normal conduction voltage of a power switch tube in the inverter module, and at the moment, Q1 is conducted; when the input signal of the HIN port is in a low level, the HO port outputs 0V, the voltage of the grid of the Q1 is-5V at the moment, and the voltage is smaller than the conducting voltage of the Q1, so that the negative voltage of the Q1 is turned off. And the voltage of the lower nozzle Q2 charges the capacitor C4 through the resistor R5, after the charging is finished, the voltage of the capacitor C4 keeps 5V, and the voltage of the emitter of the Q2 is 5V. When the input signal of the LIN port is at a high level, the LO port outputs 20V, the grid voltage of Q2 is 15V and is greater than the normal conducting voltage of a power switch tube in the inverter module, and at the moment, Q2 is conducted; when the LIN port input signal is low, the LO port outputs 0V, at this time, the gate voltage of Q2 is-5V, which is less than the on voltage of Q2, and the negative voltage of Q2 is turned off.
The system protection module comprises an overvoltage and undervoltage protection module and an overcurrent protection module which are connected with the DSP control module.
As shown in fig. 4, the brown-out protection module includes a logic gate chip with model SN74LVC1G00DCKR, and a first inverter with model LM 339N. The Y port of the logic gate chip is connected with the DSP control module through a resistor R6 and is connected with the power module through a resistor R7, and meanwhile, one end of a resistor R7 is grounded through diodes D8 and D9 in sequence; and the VCC port of the logic gate chip is connected with the power supply module. Pins 1 and 2 of the first inverter are connected with an A port of the logic gate chip, and a resistor R8 is also connected in series between the pins 2 and 3 of the first inverter; the pin 5 is sequentially connected with the power module through resistors R9 and R10, and one end of the resistor R10 is also sequentially grounded through resistors R12 and R14; pin 7 is connected with pin 4 and is connected with a direct current bus through a resistor R11; pin 6 is connected to resistor R14 through resistor R13 and to ground.
In the circuit, the resistances of the resistors R6-R14 are all 1K.
Taking the application scenario shown in fig. 2 as an example, with the overvoltage and undervoltage protection module designed as above, after the voltage on the dc bus is divided by the resistors R10, R12, and R14, a high level and a low level are obtained. When the circuit normally works, the circuit outputs a high level, and the high level is changed into an output low level after the phase inversion of the first inverter, and because the PDPINTA in the DSP control module is effective to the high level, the circuit protection cannot be triggered. When the voltage is over-voltage or under-voltage, the first inverter can output a low level, and after phase inversion, the first inverter outputs a high level, and at the moment, the DSP control module responds to automatically cut off the circuit, so that the purpose of protecting the circuit is achieved.
As shown in fig. 5, the overcurrent protection module includes a second inverter with a model LM339ADR, a capacitor C7 with one end connected to the second inverter pin 5 and the other end connected to ground, a resistor R16 with one end connected to the power module and the other end connected to the second inverter pin 2, and a resistor R17 with one end connected to the second inverter pin 4 and the other end connected to ground. The pin 2 of the second inverter is connected with the DSP control module through a resistor R15; a pin 4 of the second inverter is connected with the power module through a resistor R18, and a pin 3 is connected with the power module; pin 5 is connected with a direct current bus through a resistor R19; one end of the resistor R16 is grounded through the diodes D10 and D11 in sequence.
In the circuit, the resistances of the resistors R15-R19 are all 1K, and the capacitance of the capacitor C7 is 0.1 uF.
Taking the application scenario shown in fig. 2 as an example, with the overcurrent protection module designed as above, when the voltage obtained by voltage division by the resistor R19 is smaller than the voltage generated by the detection current, the low level is output after inversion by the second inverter, and since the PDPINTA in the DSP control module is effective for the high level, the circuit protection is not triggered. When the voltage obtained after the voltage division of the R19 is greater than the voltage generated by the detection current, a high level is output after the inversion of the second inverter, and at the moment, the DSP control module responds, the system is automatically interrupted, and the safety of the circuit is protected.
The invention takes the DSP control module as a core, and is matched with the design of the voltage and current sampling module and the driving module, so that the purpose of controlling the output voltage and current of the charging system is realized, the effect of stably and rapidly charging the storage battery in the shared charger baby is realized, and the rental application scene of the shared charger baby is further met. Meanwhile, the invention also realizes the function of system protection by matching the design of the DSP control module and the system protection module, thereby ensuring the good and reliable operation of the whole system.
The particular embodiments described above are illustrative only of the spirit of the invention. Modifications or additions may be made to the described embodiments by persons skilled in the art or may be substituted in a similar manner without departing from the spirit of the invention or exceeding the scope of the protection defined by the claims.

Claims (10)

1. The utility model provides a control system for controlling sharing treasured that charges voltage and electric current size, characterized by, including setting up voltage and current sampling module, DSP control module, drive module, the power module in the cabinet that charges, wherein:
the voltage and current sampling module is used for collecting charging voltage and current signals output by the charging cabinet to the shared charger storage battery and feeding the charging voltage and current signals back to the DSP control module, and the DSP control module controls the driving circuit according to the feedback information to influence an inversion module in a charging system of the charging cabinet and realize control of the magnitude of output voltage and current; and the power supply module is used for providing a working power supply for the voltage and current sampling module, the DSP control module and the driving module.
2. The control system as claimed in claim 1, further comprising a system protection module connected to the DSP control module and the power module.
3. The control system of claim 2, wherein the system protection module comprises an under-voltage over-voltage protection module and an over-current protection module both connected to the DSP control module.
4. The control system of claim 3, wherein the under-voltage over-voltage protection module comprises a logic gate chip of model SN74LVC1G00DCKR and a first inverter of model LM 339N; the Y port of the logic gate chip is connected with the DSP control module through a resistor R6 and is connected with the power module through a resistor R7, and meanwhile, one end of a resistor R7 is also sequentially grounded through diodes D8 and D9; the VCC port of the logic gate chip is connected with the power supply module; pins 1 and 2 of the first inverter are connected with an A port of the logic gate chip, and a resistor R8 is also connected in series between the pins 2 and 3 of the first inverter; the pin 5 is sequentially connected with the power module through resistors R9 and R10, and one end of the resistor R10 is also sequentially grounded through resistors R12 and R14; pin 7 is connected with pin 4 and is connected with a direct current bus through a resistor R11; pin 6 is connected to resistor R14 through resistor R13 and to ground.
5. The control system of claim 3, wherein the over-current protection module comprises a second inverter of type LM339ADR, a capacitor C7 connected to the second inverter pin 5 and the ground at the other end, a resistor R16 connected to the power module and the second inverter pin 2 at one end, and a resistor R17 connected to the second inverter pin 4 and the ground at the other end; the pin 2 of the second inverter is connected with the DSP control module through a resistor R15; a pin 4 of the second inverter is connected with the power module through a resistor R18, and a pin 3 of the second inverter is connected with the power module; pin 5 is connected with a direct current bus through a resistor R19; one end of the resistor R16 is grounded through the diodes D10 and D11 in sequence.
6. The control system according to any one of claims 1 to 5, wherein the driver module comprises a driver chip of type IR2110, a resistor R4 connected to the HO port of the driver chip and the other end of the driver chip, a capacitor C1 connected to the VB port of the driver chip and the other end of the capacitor C1 connected to the inverter module of the charging cabinet charging system, a resistor R3 connected to the LO port of the driver chip and the other end of the resistor R3 connected to the inverter module of the charging cabinet charging system, a diode D3 connected to the two ends of the resistor R4, and a diode D5 connected to the two ends of the resistor R3; the VCC port, the VDD port, the VSS port and the VB port of the driving chip are all connected with a power module; and the HIN port and the LIN port of the driving chip are both connected with the DSP control module.
7. The control system of claim 6, wherein the driving module further comprises a negative bias module comprising a capacitor C2 and a diode D4 connected in parallel between the VS port of the driving chip and the inverter module of the charging cabinet charging system, and a capacitor C4 and a diode D6 connected in parallel to the VCC port of the driving chip and to ground.
8. The control system as claimed in claim 7, wherein the VB port of the driver chip is connected to the power module via a diode D7.
9. The control system as claimed in claim 8, wherein the capacitors C5 and C6 are connected between the VDD terminal and the VCC terminal of the driver chip and are connected in parallel to each other and to ground.
10. The control system of claim 9, wherein a diode D1 and a resistor R2 are connected in parallel between the HO port and the VB port of the driver chip; and a diode D2 and a resistor R1 which are mutually connected in parallel are connected in series between the VCC port and the LO port of the driving chip.
CN202111397235.5A 2021-11-23 2021-11-23 Control system for controlling charging voltage and current of shared charger Pending CN114094667A (en)

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* Cited by examiner, † Cited by third party
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CN103248107A (en) * 2013-05-20 2013-08-14 镇江天力变压器有限公司 High-power vehicle-mounted charging device based on DSP (Digital Signal Processor) control
US20160028229A1 (en) * 2014-07-22 2016-01-28 Toyota Jidosha Kabushiki Kaisha Power supply system
CN112054600A (en) * 2020-08-20 2020-12-08 猪草微(深圳)电子有限公司 Sharing treasured and charging rack system that charges
CN112421786A (en) * 2020-08-20 2021-02-26 猪草微(深圳)电子有限公司 Sharing treasured that charges
CN213461205U (en) * 2020-11-30 2021-06-15 深圳市海豚共享科技有限公司 Sharing cabinet that charges

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US20160028229A1 (en) * 2014-07-22 2016-01-28 Toyota Jidosha Kabushiki Kaisha Power supply system
CN112054600A (en) * 2020-08-20 2020-12-08 猪草微(深圳)电子有限公司 Sharing treasured and charging rack system that charges
CN112421786A (en) * 2020-08-20 2021-02-26 猪草微(深圳)电子有限公司 Sharing treasured that charges
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