Lithium battery intelligent charging control system of battery changing cabinet

Abstract

The invention discloses a lithium battery intelligent charging control system of a battery changing cabinet, and relates to the technical field of battery changing cabinets, and the system comprises a micro-control module which controls a first conversion module to carry out electric energy transmission, power adjustment, energy storage filtering, voltage boosting and double-path voltage transformation; and controlling the second conversion module to carry out electric energy transmission, power regulation, energy storage filtering, boosting and double-path transformation, and after a charging period is completed, carrying out electric energy transmission control again to realize electric energy conversion regulation control on the first conversion module and the second conversion module in different time periods. And according to the charging states of the first charging module, the second charging module, the third charging module and the fourth charging module, mutual current expansion processing is carried out between the charging modules by the bidirectional current expansion module. According to the lithium battery intelligent charging control system of the battery changing cabinet, the situation that the current is reduced when multi-path electric energy conversion adjustment is carried out can be avoided, the stable-voltage constant-current power supply efficiency is improved, and the charging rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of battery swapping cabinets, and specifically to an intelligent charging control system for lithium batteries of a battery swapping cabinet. Background Art

[0002] A battery swapping cabinet is an intelligent device that provides fast battery replacement services for electric two-wheel vehicles. Users can put the lithium batteries of electric two-wheel vehicles into the cabinet for charging control by scanning a code or operating through an APP. In order to achieve the charging control of multiple lithium batteries, the existing battery swapping cabinets generally have multiple battery compartments to realize the charging control of multiple groups of lithium batteries. However, when charging multiple groups of lithium batteries together, the charging current will be reduced, and then the charging efficiency of the lithium batteries will be reduced. Therefore, it needs to be improved. Summary of the Invention

[0003] An embodiment of the present invention provides an intelligent charging control system for lithium batteries of a battery swapping cabinet to solve the problems proposed in the above background art.

[0004] According to the embodiment of the present invention, an intelligent charging control system for lithium batteries of a battery swapping cabinet is provided, including: a power supply module for rectifying the input AC power and outputting a first electric energy; a micro-control module connected to the first charging module, the second charging module, the third charging module, the fourth charging module, a bidirectional current boosting module, a first conversion module, and a second conversion module, for outputting a first control signal and a first adjustment signal when the first charging module or the second charging module is charging, stopping outputting the first control signal when the charging voltage reaches the required voltage, outputting a second control signal and a second adjustment signal when the third charging module or the fourth charging module is charging and the first control signal stops being output, stopping outputting the second control signal when the charging voltage reaches the required voltage, re-outputting the first control signal when the first conversion module completes a charging cycle, controlling the bidirectional current boosting module to perform current boosting processing on the first charging module and the fourth charging module, performing current boosting processing on the second charging module and the third charging module according to the charging states of the first charging module, the second charging module, the third charging module, and the fourth charging module, and performing shunt control on the first charging module, the second charging module, the third charging module, or the fourth charging module according to the current boosting state; a first conversion module connected to the power supply module, for receiving the first control signal and transmitting the first electric energy, receiving the first adjustment signal and performing power adjustment, energy storage filtering, voltage boosting, and dual-channel voltage conversion processing on the transmitted first electric energy, stopping transmitting the first electric energy and performing voltage boosting processing on the stored electric energy, and outputting a second electric energy; The second conversion module, connected to the power supply module, is configured to receive the second control signal and transmit the first electric energy, receive the second adjustment signal and perform power adjustment, energy storage filtering, boost conversion, and dual-channel voltage conversion on the transmitted first electric energy, stop transmitting the first electric energy and perform boost conversion on the stored electric energy, and output the third electric energy; The first charging module, connected to the first conversion module, is configured to perform rectification filtering and shunt processing on the second electric energy and output the fourth electric energy; The second charging module, connected to the first conversion module, is configured to perform rectification filtering and shunt processing on the second electric energy and output the fifth electric energy; The third charging module, connected to the second conversion module, is configured to perform rectification filtering and shunt processing on the third electric energy and output the sixth electric energy; The fourth charging module, connected to the second conversion module, is configured to perform rectification filtering and shunt processing on the third electric energy and output the seventh electric energy; The bidirectional current boosting module, connected to the first charging module, the second charging module, the third charging module, and the fourth charging module, is configured to control the fourth electric energy to boost the seventh electric energy or the seventh electric energy to boost the fourth electric energy, and control the fifth electric energy to boost the sixth electric energy or the sixth electric energy to boost the fifth electric energy.

[0005] As a further aspect of the present invention: The power supply module includes a power interface and a first rectifier; the first conversion module includes a first power transistor, a second power transistor, a third power transistor, a first inductor, a first capacitor, a second capacitor, a third capacitor, a first diode, a second diode, a third inductor, and a first transformer; the micro control module includes a first controller; Preferably, the first end and the second end of the power interface are respectively connected to the first end and the second end of the first rectifier, the third end of the first rectifier is connected to the drain of the first power transistor, the source of the first power transistor is connected to the drain of the third power transistor and is connected to the source of the second power transistor and one end of the third capacitor through the first inductor, the other end of the third inductor is connected to the first end of the primary side of the first transformer, the second end of the primary side of the first transformer is connected to the cathode of the second diode, the anode of the first diode, and one end of the third capacitor and is connected to the cathode of the first diode, one end of the first capacitor, and the drain of the second power transistor through the second capacitor, the other end of the third capacitor is connected to the anode of the second diode, the other end of the first capacitor, the source of the third power transistor, and the fourth end of the first rectifier, the gates of the first power transistor, the second power transistor, and the third power transistor are respectively connected to the IO1 terminal, the IO2 terminal, and the IO3 terminal of the first controller, and the first secondary side and the second secondary side of the first transformer are respectively connected to the first charging module and the second charging module.

[0006] As a further solution of the present invention: The first charging module includes a second rectifier, a fourth capacitor, a seventh power transistor, a first resistor, and a first interface; Preferably, the first end and the second end of the second rectifier are respectively connected to the first end and the second end of the first secondary side of the first transformer. The third end of the second rectifier is connected to the drain of the seventh power transistor and one end of the first interface, and is connected to the fourth end of the second rectifier, one end of the first resistor, the other end of the first interface, and the ground terminal through the fourth capacitor. The gate of the seventh power transistor is connected to the IO8 terminal of the first controller.

[0007] As a further solution of the present invention: The second charging module includes a third rectifier, a fifth capacitor, an eighth power transistor, a second resistor, and a second interface; Preferably, the first end and the second end of the third rectifier are respectively connected to the first end and the second end of the second secondary side of the first transformer. The fourth end of the third rectifier is connected to the drain of the eighth power transistor and one end of the second interface, and is connected to the fourth end of the third rectifier, one end of the eighth resistor, the other end of the second interface, and the ground terminal through the fifth capacitor. The source of the eighth power transistor is connected to the other end of the second resistor. The gate of the eighth power transistor is connected to the IO10 terminal of the first controller.

[0008] As a further solution of the present invention: The second conversion module includes a fourth power transistor, a fifth power transistor, a sixth power transistor, an electric energy conversion device, and a second transformer; Preferably, the drain of the fourth power transistor is connected to the third end of the first rectifier. The source of the fourth power transistor is connected to the drain of the fifth power transistor and is connected to the source of the sixth power transistor and the second input terminal of the electric energy conversion device through the second inductor. The drain of the sixth power transistor is connected to the first input terminal of the electric energy conversion device. The source of the fifth power transistor is connected to the fourth end of the first rectifier. The ground terminal of the electric energy conversion device is grounded. The first output terminal and the second output terminal of the electric energy conversion device are respectively connected to the first end and the second end of the primary side of the second transformer. The first secondary side and the second secondary side of the second transformer are respectively connected to the third charging module and the fourth charging module.

[0009] As a further solution of the present invention: The third charging module includes a fourth rectifier, a sixth capacitor, a thirteenth power transistor, a third resistor, and a third interface; The fourth charging module includes an electric energy control device and a fourth interface; Preferably, the first end and the second end of the fourth rectifier are respectively connected to the first end and the second end of the first secondary side of the second transformer. The third end of the fourth rectifier is connected to the drain of the thirteenth power transistor and the first end of the third interface. The source of the thirteenth power transistor is connected to the other end of the third interface, the other end of the sixth capacitor, the fourth end of the first rectifier and the ground through the third resistor. The gate of the thirteenth power transistor is connected to the IO9 terminal of the first controller. The first input terminal and the second input terminal of the power control device are respectively connected to the first end and the second end of the second secondary side of the second transformer. The output terminal of the power control device is connected to one end of the fourth interface. The ground terminal of the power control device is connected to the other end of the fourth interface. The shunt terminal of the power control device is connected to the IO7 terminal of the first controller.

[0010] As a further solution of the present invention: The bidirectional current boosting module includes a ninth power transistor, a tenth power transistor, an eleventh power transistor and a twelfth power transistor; Preferably, the drain of the ninth power transistor is connected to the output terminal of the power control device. The source of the ninth power transistor is connected to the source of the tenth power transistor. The drain of the tenth power transistor is connected to the third end of the second rectifier. The drain of the eleventh power transistor is connected to the third end of the fourth rectifier. The source of the eleventh power transistor is connected to the source of the twelfth power transistor. The drain of the twelfth power transistor is connected to the third end of the third rectifier. The gates of the ninth power transistor, the tenth power transistor, the eleventh power transistor and the twelfth power transistor are respectively connected to the IO7 terminal, the IO8 terminal, the IO9 terminal and the IO10 terminal of the first controller.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The intelligent lithium battery charging control system of the battery swapping cabinet of the present invention can control the first conversion module to perform power transmission, power regulation, energy storage filtering, boosting and dual-channel voltage conversion regulation by the micro control module. When the first conversion module stops power transmission work, it controls the second conversion module to start power transmission, power regulation, energy storage filtering, boosting and dual-channel voltage conversion regulation work. After the first conversion module completes a charging cycle, it resumes power transmission control, realizing the control of power conversion regulation of the first conversion module and the second conversion module at different time periods, avoiding the situation of current drop when performing power conversion regulation simultaneously, improving the efficiency of regulated constant current power supply, and performing mutual current boosting processing between the charging modules by the bidirectional current boosting module according to the charging states of the first charging module, the second charging module, the third charging module and the fourth charging module, improving the charging rate of the lithium battery. Description of the Drawings

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0013] Figure 1 It is a schematic block diagram of the principle of an intelligent charging control system for a lithium battery of a battery swapping cabinet provided by an embodiment of the present invention.

[0014] Figure 2 It is a circuit diagram of an intelligent charging control system for a lithium battery of a battery swapping cabinet provided by an embodiment of the present invention.

[0015] Figure 3 It is a circuit diagram of the fourth charging module provided by an embodiment of the present invention. Specific embodiments

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0017] In one embodiment, please refer to Figure 1 , an intelligent charging control system for a lithium battery of a battery swapping cabinet, including: Specifically, a power supply module 1, configured to rectify the input AC power and output the first power; The micro - control module 4, connected to the first charging module 5, the second charging module 6, the third charging module 7, the fourth charging module 8, the bidirectional current - boosting module 9, the first conversion module 2 and the second conversion module 3, is used to output a first control signal and a first adjustment signal when the first charging module 5 or the second charging module 6 is charging, stop outputting the first control signal when the charging voltage reaches the required voltage, output a second control signal and a second adjustment signal when the third charging module 7 or the fourth charging module 8 is charging and the first control signal stops being output, stop outputting the second control signal when the charging voltage reaches the required voltage, re - output the first control signal when the first conversion module 2 completes a charging cycle, control the bidirectional current - boosting module 9 to perform current - boosting processing on the first charging module 5 and the fourth charging module 8 and on the second charging module 6 and the third charging module 7 according to the charging states of the first charging module 5, the second charging module 6, the third charging module 7 and the fourth charging module 8, and perform shunt control on the first charging module 5, the second charging module 6, the third charging module 7 or the fourth charging module 8 according to the current - boosting state; The first conversion module 2, connected to the power supply module 1, is used to receive the first control signal and transmit the first electric energy, receive the first adjustment signal and perform power adjustment, energy storage filtering, voltage boosting and dual - path voltage conversion processing on the transmitted first electric energy, stop transmitting the first electric energy and perform voltage - boosting processing on the stored electric energy, and output the second electric energy; The second conversion module 3, connected to the power supply module 1, is used to receive the second control signal and transmit the first electric energy, receive the second adjustment signal and perform power adjustment, energy storage filtering, voltage boosting and dual - path voltage conversion processing on the transmitted first electric energy, stop transmitting the first electric energy and perform voltage - boosting processing on the stored electric energy, and output the third electric energy; The first charging module 5, connected to the first conversion module 2, is used to perform rectification filtering processing and shunt processing on the second electric energy, and output the fourth electric energy; The second charging module 6, connected to the first conversion module 2, is used to perform rectification filtering processing and shunt processing on the second electric energy, and output the fifth electric energy; The third charging module 7, connected to the second conversion module 3, is used to perform rectification filtering processing and shunt processing on the third electric energy, and output the sixth electric energy; The fourth charging module 8, connected to the second conversion module 3, is used to perform rectification filtering processing and shunt processing on the third electric energy, and output the seventh electric energy; The bidirectional current - boosting module 9, connected to the first charging module 5, the second charging module 6, the third charging module 7 and the fourth charging module 8, is used to control the fourth electric energy to perform current - boosting processing on the seventh electric energy or the seventh electric energy to perform current - boosting processing on the fourth electric energy, and control the fifth electric energy to perform current - boosting processing on the sixth electric energy or the sixth electric energy to perform current - boosting processing on the fifth electric energy.

[0018] In a specific embodiment, the above-mentioned power supply module 1 can adopt a power supply circuit composed of a power interface and a rectifier, which can access AC power and perform rectification processing; the above-mentioned first conversion module 2 can adopt a first conversion circuit composed of a field effect transistor, a capacitor, an inductor, a transformer, etc., which can perform power transmission and perform power regulation, energy storage filtering, boost and dual-channel voltage conversion processing on the transmitted power. When the output power reaches the required power, that is, the charging voltage, the power transmission is stopped, and then the stored power is subjected to boost and dual-channel voltage conversion processing; the above-mentioned second conversion module 3 can adopt a second conversion circuit composed of a field effect transistor, a capacitor, an inductor, a transformer, etc., which can perform power transmission and perform power regulation, energy storage filtering, boost and dual-channel voltage conversion processing on the transmitted power. When the output power reaches the required power, that is, the charging voltage, the power transmission is stopped, and then the stored power is subjected to boost and dual-channel voltage conversion processing; the above-mentioned micro-control module 4 can adopt a micro-control circuit composed of a single-chip microcomputer, which integrates many components such as an arithmetic unit, a controller, a memory, and an input / output unit, and realizes functions such as signal processing, data storage, module control, and timing control; the above-mentioned first charging module 5 can adopt a first charging circuit composed of a rectifier, a field effect transistor, and a resistor, which can rectify and filter the input power and supply power to the connected lithium battery. When not connected to the lithium battery, it can perform shunt power supply; the above-mentioned second charging module 6 can adopt a second charging circuit composed of a rectifier, a field effect transistor, and a resistor, which can rectify and filter the input power and supply power to the connected lithium battery. When not connected to the lithium battery, it can perform shunt power supply; the above-mentioned third charging module 7 can adopt a third charging circuit composed of a rectifier, a field effect transistor, and a resistor, which can rectify and filter the input power and supply power to the connected lithium battery. When not connected to the lithium battery, it can perform shunt power supply; the above-mentioned fourth charging module 8 can adopt a fourth charging circuit composed of a rectifier, a field effect transistor, and a resistor, which can rectify and filter the input power and supply power to the connected lithium battery. When not connected to the lithium battery, it can perform shunt power supply; the above-mentioned bidirectional current boosting module 9 can adopt a bidirectional current boosting circuit composed of a field effect transistor, which can perform bidirectional power transmission control, and realize the current boosting processing of the first charging module 5 to the fourth charging module 8 or the fourth charging module 8 to the first charging module 5, and realize the current boosting processing of the second charging module 6 to the third charging module 7 or the third charging module 7 to the second charging module 6.

[0019] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the power supply module 1 includes a power interface and a first rectifier T1; the first conversion module 2 includes a first power transistor Q1, a second power transistor Q2, a third power transistor Q3, a first inductor L1, a first capacitor C1, a second capacitor C1, a third capacitor C3, a first diode D1, a second diode D2, a third inductor L3, and a first transformer B1; the micro-control module 4 includes a first controller U1; Specifically, the first end and the second end of the power interface are respectively connected to the first end and the second end of the first rectifier T1. The third end of the first rectifier T1 is connected to the drain of the first power transistor Q1. The source of the first power transistor Q1 is connected to the drain of the third power transistor Q3 and is connected to the source of the second power transistor Q2 and one end of the third capacitor C3 through the first inductor L1. The other end of the third inductor L3 is connected to the first end of the primary side of the first transformer B1. The second end of the primary side of the first transformer B1 is connected to the cathode of the second diode D2, the anode of the first diode D1 and one end of the third capacitor C3 and is connected to the cathode of the first diode D1, one end of the first capacitor C1 and the drain of the second power transistor Q2 through the second capacitor C1. The other end of the third capacitor C3 is connected to the anode of the second diode D2, the other end of the first capacitor C1, the source of the third power transistor Q3 and the fourth end of the first rectifier T1. The gates of the first power transistor Q1, the second power transistor Q2 and the third power transistor Q3 are respectively connected to the IO1 terminal, the IO2 terminal and the IO3 terminal of the first controller U1. The first secondary side and the second secondary side of the first transformer B1 are respectively connected to the first charging module 5 and the second charging module 6.

[0020] In a specific embodiment, the first controller U1 can be selected as an STM32 single-chip microcomputer; the first power transistor Q1, the second power transistor Q2 and the third power transistor Q3 can all be selected as N-channel field effect transistors. Among them, the first power transistor Q1 controls the power transmission, cooperates with the second power transistor Q2 and the first inductor L1 to perform power regulation processing. When the third power transistor Q3 is turned on, the magnetic flux of the first transformer B1 can be reduced, the temperature can be lowered, and a charging cycle can be completed; the second capacitor C1, the first diode D1, the third capacitor C3, the second diode D2, the third inductor L3 and the first transformer B1 perform resonance regulation processing to achieve energy storage filtering and step-up voltage transformation processing.

[0021] Further, the first charging module 5 includes a second rectifier T2, a fourth capacitor C4, a seventh power transistor Q7, a first resistor R1 and a first interface; Specifically, the first end and the second end of the second rectifier T2 are respectively connected to the first end and the second end of the first secondary side of the first transformer B1. The third end of the second rectifier T2 is connected to the drain of the seventh power transistor Q7 and one end of the first interface and is connected to the fourth end of the second rectifier T2, one end of the first resistor R1, the other end of the first interface and the ground terminal through the fourth capacitor C4. The gate of the seventh power transistor Q7 is connected to the IO8 terminal of the first controller U1.

[0022] In a specific embodiment, the seventh power transistor Q7 can be selected as an N-channel field effect transistor to cooperate with the first resistor R1 for shunt processing; the first interface is connected to the charging terminal of the lithium battery.

[0023] Further, the second charging module 6 includes a third rectifier T3, a fifth capacitor C5, an eighth power transistor Q8, a second resistor R2, and a second interface; Specifically, the first end and the second end of the third rectifier T3 are respectively connected to the first end and the second end of the second secondary side of the first transformer B1. The fourth end of the third rectifier T3 is connected to the drain of the eighth power transistor Q8 and one end of the second interface, and is connected to the fourth end of the third rectifier T3, one end of the eighth resistor, the other end of the second interface, and the ground terminal through the fifth capacitor C5. The source of the eighth power transistor Q8 is connected to the other end of the second resistor R2, and the gate of the eighth power transistor Q8 is connected to the IO10 terminal of the first controller U1.

[0024] In a specific embodiment, the above-mentioned eighth power transistor Q8 can be selected as an N-channel field effect transistor for current expansion processing in cooperation with the second resistor R2; the above-mentioned second interface is connected to the charging terminal of the lithium battery.

[0025] Further, the second conversion module 3 includes a fourth power transistor Q4, a fifth power transistor Q5, a sixth power transistor Q6, an electric energy conversion device, and a second transformer B2; Specifically, the drain of the fourth power transistor Q4 is connected to the third end of the first rectifier T1. The source of the fourth power transistor Q4 is connected to the drain of the fifth power transistor Q5 and is connected to the source of the sixth power transistor Q6 and the second input terminal of the electric energy conversion device through a second inductor. The drain of the sixth power transistor Q6 is connected to the first input terminal of the electric energy conversion device. The source of the fifth power transistor Q5 is connected to the fourth end of the first rectifier T1. The ground terminal of the electric energy conversion device is grounded. The first output terminal and the second output terminal of the electric energy conversion device are respectively connected to the first end and the second end of the primary side of the second transformer B2. The first secondary side and the second secondary side of the second transformer B2 are respectively connected to the third charging module 7 and the fourth charging module 8.

[0026] In a specific embodiment, the above-mentioned fourth power transistor Q4, fifth power transistor Q5, and sixth power transistor Q6 can all be selected as N-channel field effect transistors. Among them, the fourth power transistor Q4 controls the power transmission and cooperates with the sixth power transistor Q6 and the second inductor for power regulation processing. When the fifth power transistor Q5 is turned on, it can reduce the magnetic flux of the second transformer B2, lower the temperature, and complete a charging cycle; the circuit composition structure of the above-mentioned electric energy conversion device is the same as the circuit composition structure of the above-mentioned first capacitor C1, second capacitor C1, third capacitor C3, first diode D1, second diode D2, and third inductor L3.

[0027] Further, the third charging module 7 includes a fourth rectifier T4, a sixth capacitor C6, a thirteenth power transistor Q13, a third resistor R3, and a third interface; the fourth charging module 8 includes an electric energy control device and a fourth interface; Specifically, the first end and the second end of the fourth rectifier T4 are respectively connected to the first end and the second end of the first secondary side of the second transformer B2. The third end of the fourth rectifier T4 is connected to the drain of the thirteenth power transistor Q13 and the first end of the third interface. The source of the thirteenth power transistor Q13 is connected to the other end of the third interface, the other end of the sixth capacitor C6, the fourth end of the first rectifier T1, and the ground terminal through the third resistor R3. The gate of the thirteenth power transistor Q13 is connected to the IO9 terminal of the first controller U1. The first input terminal and the second input terminal of the power control device are respectively connected to the first end and the second end of the second secondary side of the second transformer B2. The output terminal of the power control device is connected to one end of the fourth interface. The ground terminal of the power control device is connected to the other end of the fourth interface. The shunt terminal of the power control device is connected to the IO7 terminal of the first controller U1.

[0028] In a specific embodiment, the above-mentioned thirteenth power transistor Q13 can be selected as an N-channel field effect transistor to perform shunt processing in cooperation with the third resistor R3. Both the above-mentioned third interface and the fourth interface can be connected to the charging terminal of the lithium battery. The circuit composition structure of the above-mentioned power control device is the same as the circuit composition structure of the above-mentioned fourth rectifier T4, sixth capacitor C6, thirteenth power transistor Q13, and third resistor R3.

[0029] Further, the bidirectional current boosting module 9 includes a ninth power transistor Q9, a tenth power transistor Q10, an eleventh power transistor Q11, and a twelfth power transistor Q12. Specifically, the drain of the ninth power transistor Q9 is connected to the output terminal of the power control device. The source of the ninth power transistor Q9 is connected to the source of the tenth power transistor Q10. The drain of the tenth power transistor Q10 is connected to the third end of the second rectifier T2. The drain of the eleventh power transistor Q11 is connected to the third end of the fourth rectifier T4. The source of the eleventh power transistor Q11 is connected to the source of the twelfth power transistor Q12. The drain of the twelfth power transistor Q12 is connected to the third end of the third rectifier T3. The gates of the ninth power transistor Q9, the tenth power transistor Q10, the eleventh power transistor Q11, and the twelfth power transistor Q12 are respectively connected to the IO7 terminal, IO8 terminal, IO9 terminal, and IO10 terminal of the first controller U1.

[0030] In a specific embodiment, the above-mentioned ninth power transistor Q9, tenth power transistor Q10, eleventh power transistor Q11, and twelfth power transistor Q12 can all be selected as N-channel field effect transistors to perform power transmission control.

[0031] In the intelligent lithium battery charging control system of a battery swapping cabinet in this embodiment, AC power is accessed through a power interface, and the first rectifier T1 performs rectification processing and outputs the first electric energy. When charging in the first charging module 5 or the second charging module 6, the first control signal is output from the IO1 terminal of the first controller U1, which can control the first power transistor Q1 to conduct, and then transmit the first electric energy. The first adjustment signal is output from the IO2 terminal of the first controller U1 and controls the second power transistor Q2 to conduct. The first inductor L1 stores energy and supplies power, and the first capacitor C1, the second capacitor C1, and the third capacitor C3 store energy and filter. Then, the first transformer B1 performs step-up processing and outputs the second electric energy. When the second electric energy reaches the required voltage, that is, the charging voltage, the first controller U1 stops outputting the first control signal. At this time, the transmission of the first electric energy stops, and the first capacitor C1, the second capacitor C1, and the third capacitor C3 cooperate with the first inductor L1 to discharge. The first transformer B1 performs voltage transformation and maintains the supply of the charging voltage. After the first inductor L1 finishes discharging, the first adjustment signal will be output from the IO3 terminal of the first controller U1 and control the third power transistor Q3 to conduct, reducing the magnetic flux of the first transformer B1, reducing the temperature, and completing a charging cycle. Similarly, when charging in the third charging module 7 or the fourth charging module 8, the first controller U1 can control the conduction states of the fourth power transistor Q4, the fifth power transistor Q5, and the sixth power transistor Q6, and cooperate with the electric energy conversion device to realize electric energy transmission, power adjustment, energy storage filtering, step-up, and dual-channel voltage transformation processing and reduce the circuit temperature. It should be noted that when the first controller U1 stops outputting the first control signal, the second conversion module 3 starts to perform electric energy transmission work, and after the first conversion module 2 completes a charging cycle, the first electric energy is transmitted again. At this time, the second conversion module 3 is disconnected from the power module 1, realizing the alternating power consumption control of the first conversion module 2 and the second conversion module 3 for the power module 1, and then providing a constant power supply. The output second electric energy can be rectified and filtered through the second rectifier T2 and the fourth capacitor C4 and transmitted to the first interface, and rectified and filtered through the third rectifier T3 and the fifth capacitor C5 and transmitted to the second interface. The output third electric energy is rectified and filtered through the electric energy control device and transmitted to the fourth interface, and rectified and filtered through the fourth rectifier T4 and the sixth capacitor C6 and transmitted to the third interface. Only when the first interface is connected to the lithium battery or the second interface is connected to the lithium battery, and when the third interface is not connected to the lithium battery, the IO9 terminal of the first controller U1 can control the thirteenth power transistor Q13 and the eleventh power transistor Q11 to conduct, cooperate with the third resistor R3 for shunt processing and expand the current for the second interface. When the fourth interface is not connected to the lithium battery, the IO7 terminal of the first controller U1 can control the electric energy control device for shunt, control the ninth power transistor Q9 to conduct and expand the current for the first interface. Similarly, only when the third interface is connected to the lithium battery or the fourth interface is connected to the lithium battery, and the first interface is not connected to the lithium battery, the first charging module 5 can expand the current for the fourth charging module 8.The second interface is not connected to the lithium battery, and the second charging module 6 can provide current boost for the third charging module 7.

[0032] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0033] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An intelligent charging control system for lithium batteries of a battery swapping cabinet, characterized in that, The system includes: A power supply module for rectifying the input AC power and outputting the first electric energy; A micro-control module connected to the first charging module, the second charging module, the third charging module, the fourth charging module, the bidirectional current boosting module, the first conversion module, and the second conversion module. When the first charging module or the second charging module is charging, it outputs a first control signal and a first adjustment signal. When the charging voltage reaches the required voltage, it stops outputting the first control signal. When the third charging module or the fourth charging module is charging and the first control signal stops being output, it outputs a second control signal and a second adjustment signal. When the charging voltage reaches the required voltage, it stops outputting the second control signal. When the first conversion module completes a charging cycle, it resumes outputting the first control signal. According to the charging states of the first charging module, the second charging module, the third charging module, and the fourth charging module, it controls the bidirectional current boosting module to boost the current of the first charging module and the fourth charging module, boost the current of the second charging module and the third charging module, and perform shunt control on the first charging module, the second charging module, the third charging module, or the fourth charging module according to the current boosting state; A first conversion module connected to the power supply module, for receiving the first control signal and transmitting the first electric energy, receiving the first adjustment signal and performing power adjustment, energy storage filtering, step-up, and dual-path voltage conversion on the transmitted first electric energy, stopping transmitting the first electric energy and performing step-up processing on the stored electric energy, and outputting the second electric energy; A second conversion module connected to the power supply module, for receiving the second control signal and transmitting the first electric energy, receiving the second adjustment signal and performing power adjustment, energy storage filtering, step-up, and dual-path voltage conversion on the transmitted first electric energy, stopping transmitting the first electric energy and performing step-up processing on the stored electric energy, and outputting the third electric energy; A first charging module connected to the first conversion module, for rectifying, filtering, and shunting the second electric energy, and outputting the fourth electric energy; A second charging module connected to the first conversion module, for rectifying, filtering, and shunting the second electric energy, and outputting the fifth electric energy; A third charging module connected to the second conversion module, for rectifying, filtering, and shunting the third electric energy, and outputting the sixth electric energy; A fourth charging module connected to the second conversion module, for rectifying, filtering, and shunting the third electric energy, and outputting the seventh electric energy; A bidirectional current boosting module connected to the first charging module, the second charging module, the third charging module, and the fourth charging module, for controlling the fourth electric energy to boost the current of the seventh electric energy or the seventh electric energy to boost the current of the fourth electric energy, and controlling the fifth electric energy to boost the current of the sixth electric energy or the sixth electric energy to boost the current of the fifth electric energy.

2. The intelligent charging control system for lithium batteries of a battery swapping cabinet according to claim 1, wherein The power supply module includes a power supply interface and a first rectifier; the first conversion module includes a first power transistor, a second power transistor, a third power transistor, a first inductor, a first capacitor, a second capacitor, a third capacitor, a first diode, a second diode, a third inductor, and a first transformer; the micro-control module includes a first controller; The first end and the second end of the power interface are respectively connected to the first end and the second end of the first rectifier. The third end of the first rectifier is connected to the drain of the first power transistor. The source of the first power transistor is connected to the drain of the third power transistor and is connected to the source of the second power transistor and one end of the third capacitor through the first inductor. The other end of the third inductor is connected to the first end of the primary side of the first transformer. The second end of the primary side of the first transformer is connected to the cathode of the second diode, the anode of the first diode, and one end of the third capacitor and is connected to the cathode of the first diode, one end of the first capacitor, and the drain of the second power transistor through the second capacitor. The other end of the third capacitor is connected to the anode of the second diode, the other end of the first capacitor, the source of the third power transistor, and the fourth end of the first rectifier. The gates of the first power transistor, the second power transistor, and the third power transistor are respectively connected to the IO1 terminal, the IO2 terminal, and the IO3 terminal of the first controller. The first secondary side and the second secondary side of the first transformer are respectively connected to the first charging module and the second charging module.

3. The intelligent charging control system for lithium batteries of a battery swapping cabinet according to claim 2, characterized in that, The first charging module includes a second rectifier, a fourth capacitor, a seventh power transistor, a first resistor, and a first interface; The first end and the second end of the second rectifier are respectively connected to the first end and the second end of the first secondary side of the first transformer. The third end of the second rectifier is connected to the drain of the seventh power transistor and one end of the first interface and is connected to the fourth end of the second rectifier, one end of the first resistor, the other end of the first interface, and the ground terminal through the fourth capacitor. The gate of the seventh power transistor is connected to the IO8 terminal of the first controller.

4. The intelligent charging control system for lithium batteries of a battery swapping cabinet according to claim 3, wherein, The second charging module includes a third rectifier, a fifth capacitor, an eighth power transistor, a second resistor, and a second interface; The first end and the second end of the third rectifier are respectively connected to the first end and the second end of the second secondary side of the first transformer. The fourth end of the third rectifier is connected to the drain of the eighth power transistor and one end of the second interface and is connected to the fourth end of the third rectifier, one end of the eighth resistor, the other end of the second interface, and the ground terminal through the fifth capacitor. The source of the eighth power transistor is connected to the other end of the second resistor. The gate of the eighth power transistor is connected to the IO10 terminal of the first controller.

5. The intelligent charging control system for lithium batteries of a battery swapping cabinet according to claim 4, characterized in that, The second conversion module includes a fourth power transistor, a fifth power transistor, a sixth power transistor, an electric energy conversion device, and a second transformer; The drain of the fourth power transistor is connected to the third end of the first rectifier. The source of the fourth power transistor is connected to the drain of the fifth power transistor and is connected to the source of the sixth power transistor and the second input terminal of the electric energy conversion device through the second inductor. The drain of the sixth power transistor is connected to the first input terminal of the electric energy conversion device. The source of the fifth power transistor is connected to the fourth end of the first rectifier. The ground terminal of the electric energy conversion device is grounded. The first output terminal and the second output terminal of the electric energy conversion device are respectively connected to the first end and the second end of the primary side of the second transformer. The first secondary side and the second secondary side of the second transformer are respectively connected to the third charging module and the fourth charging module.

6. The intelligent charging control system for lithium batteries of a battery swapping cabinet according to claim 5, characterized in that, The third charging module includes a fourth rectifier, a sixth capacitor, a thirteenth power transistor, a third resistor, and a third interface; The fourth charging module includes an electric energy control device and a fourth interface; The first end and the second end of the fourth rectifier are respectively connected to the first end and the second end of the first secondary side of the second transformer. The third end of the fourth rectifier is connected to the drain of the thirteenth power transistor and the first end of the third interface. The source of the thirteenth power transistor is connected to the other end of the third interface, the other end of the sixth capacitor, the fourth end of the first rectifier, and the ground terminal through a third resistor. The gate of the thirteenth power transistor is connected to the IO9 terminal of the first controller. The first input terminal and the second input terminal of the power control device are respectively connected to the first end and the second end of the second secondary side of the second transformer. The output terminal of the power control device is connected to one end of the fourth interface. The ground terminal of the power control device is connected to the other end of the fourth interface. The shunt terminal of the power control device is connected to the IO7 terminal of the first controller.

7. The intelligent charging control system for lithium batteries of a battery swapping cabinet according to claim 6, wherein, The bidirectional current boosting module includes a ninth power transistor, a tenth power transistor, an eleventh power transistor, and a twelfth power transistor; The drain of the ninth power transistor is connected to the output terminal of the power control device. The source of the ninth power transistor is connected to the source of the tenth power transistor. The drain of the tenth power transistor is connected to the third end of the second rectifier. The drain of the eleventh power transistor is connected to the third end of the fourth rectifier. The source of the eleventh power transistor is connected to the source of the twelfth power transistor. The drain of the twelfth power transistor is connected to the third end of the third rectifier. The gates of the ninth power transistor, the tenth power transistor, the eleventh power transistor, and the twelfth power transistor are respectively connected to the IO7 terminal, the IO8 terminal, the IO9 terminal, and the IO10 terminal of the first controller.

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