An intelligent charging control system for lithium batteries in a battery swapping cabinet

Abstract

The present invention discloses an intelligent charging control system for lithium batteries of a battery swapping cabinet, which relates to the technical field of battery swapping cabinets. It includes a micro-control module that controls the first conversion module to perform power transmission, power regulation, energy storage filtering, boosting, and dual-channel voltage conversion. When the first conversion module stops power transmission, it controls the second conversion module to perform power transmission, power regulation, energy storage filtering, boosting, and dual-channel voltage conversion. After completing a charging cycle, it resumes power transmission control to achieve different-time power conversion regulation control of the first conversion module and the second conversion module. According to the charging states of the first charging module, the second charging module, the third charging module, and the fourth charging module, the bidirectional current boosting module performs mutual current boosting processing between the charging modules. The intelligent charging control system for lithium batteries of the battery swapping cabinet in the present invention can avoid the situation of current drop during multi-channel power conversion regulation, improve the stable voltage and constant current power supply efficiency, and increase the charging rate.

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 an APP. In order to achieve the charging control of multiple lithium batteries, the existing battery swapping cabinets generally have multiple battery compartments to achieve 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 raised in the above background art.

[0004] According to an 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 accessed AC power and outputting first electric energy;

[0005] A micro-control module is 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. 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 re-outputs 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 perform current boosting processing on the first charging module and the fourth charging module, perform current boosting processing on 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;

[0006] The first conversion module is connected to the power supply module, and 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-channel 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 second electric energy;

[0007] The second conversion module, connected to the power supply module, is configured to receive a second control signal and transmit first electric energy, receive a second adjustment signal and perform power adjustment, energy storage filtering, boost conversion, and dual-path 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 third electric energy;

[0008] 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 fourth electric energy;

[0009] 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 fifth electric energy;

[0010] 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 sixth electric energy;

[0011] 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 seventh electric energy;

[0012] 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 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.

[0013] As a further solution of the present invention: 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;

[0014] 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. 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.

[0015] As a further aspect 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;

[0016] 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.

[0017] As a further aspect 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;

[0018] 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.

[0019] As a further aspect 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;

[0020] Preferably, the drain of the fourth power transistor is connected to the third terminal 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 power conversion device through a second inductor, the drain of the sixth power transistor is connected to the first input terminal of the power conversion device, the source of the fifth power transistor is connected to the fourth terminal of the first rectifier, the ground terminal of the power conversion device is grounded, the first output terminal and the second output terminal of the power conversion device are respectively connected to the first terminal and the second terminal of the primary side of the second transformer, and 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.

[0021] 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 a power control device and a fourth interface;

[0022] Preferably, the first terminal and the second terminal of the fourth rectifier are respectively connected to the first terminal and the second terminal of the first secondary side of the second transformer, the third terminal of the fourth rectifier is connected to the drain of the thirteenth power transistor and the first terminal 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 terminal of the first rectifier and the ground terminal 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 terminal and the second terminal 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, and the shunt terminal of the power control device is connected to the IO7 terminal of the first controller.

[0023] 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;

[0024] 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 terminal of the second rectifier, the drain of the eleventh power transistor is connected to the third terminal 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 terminal of the third rectifier, and 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.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: The intelligent charging control system for lithium batteries of the battery swapping cabinet of the present invention can control the first conversion module by the micro-control module to perform power transmission, power regulation, energy storage filtering, boosting, and dual-channel voltage conversion regulation. When the first conversion module stops working on power transmission, it controls the second conversion module to start performing power transmission, power regulation, energy storage filtering, boosting, and dual-channel voltage conversion regulation. After the first conversion module completes a charging cycle, it resumes power transmission control, realizing the control of power conversion regulation for 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the 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 drawings can be obtained based on these drawings.

[0027] Figure 1 It is a schematic block diagram of the principle of an intelligent charging control system for lithium batteries of a battery swapping cabinet provided by an embodiment of the present invention.

[0028] Figure 2 It is a circuit diagram of an intelligent charging control system for lithium batteries of a battery swapping cabinet provided by an embodiment of the present invention.

[0029] Figure 3 It is a circuit diagram of the fourth charging module provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0031] In one embodiment, please refer to Figure 1 , an intelligent charging control system for lithium batteries of a battery swapping cabinet, including:

[0032] Specifically, a power supply module 1 for rectifying the input AC power and outputting first electric energy;

[0033] The micro - control module 4 is 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. It 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, perform current - boosting processing on the second charging module 6 and the third charging module 7, 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;

[0034] The first conversion module 2 is connected to the power supply module 1. It 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;

[0035] The second conversion module 3 is connected to the power supply module 1. It 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;

[0036] The first charging module 5 is connected to the first conversion module 2. It is used to perform rectification filtering processing and shunt processing on the second electric energy, and output the fourth electric energy;

[0037] The second charging module 6 is connected to the first conversion module 2. It is used to perform rectification filtering processing and shunt processing on the second electric energy, and output the fifth electric energy;

[0038] The third charging module 7 is connected to the second conversion module 3. It is used to perform rectification filtering processing and shunt processing on the third electric energy, and output the sixth electric energy;

[0039] The fourth charging module 8 is connected to the second conversion module 3. It is used to perform rectification filtering processing and shunt processing on the third electric energy, and output the seventh electric energy;

[0040] The bidirectional flow expansion module 9 is connected to the first charging module 5, the second charging module 6, the third charging module 7 and the fourth charging module 8, and is used to control the fourth electric energy to expand the flow of the seventh electric energy or the seventh electric energy to expand the flow of the fourth electric energy, and control the fifth electric energy to expand the flow of the sixth electric energy or the sixth electric energy to expand the flow of the fifth electric energy.

[0041] In a specific embodiment, the power supply module 1 can adopt a power supply circuit composed of a power supply interface and a rectifier, can be connected to AC power and perform rectification processing; the first conversion module 2 can adopt a first conversion circuit composed of field effect tubes, capacitors, inductors, transformers, etc., can transmit power, and perform power regulation, energy storage filtering, boosting and dual-path transformation processing on the transmitted power. After the output power reaches the required power, that is, the charging voltage, the power transmission is stopped, and the stored power is boosted and dual-path transformed; the second conversion module 3 can adopt field effect tubes, capacitors, inductors, transformers, etc. The second conversion circuit composed of the above-mentioned components can transmit electric energy and perform power regulation, energy storage filtering, boosting and dual-path transformation on the transmitted electric energy. After the output electric energy reaches the required electric energy, that is, the charging voltage, the electric energy transmission is stopped, and the stored electric energy is boosted and dual-path transformed. 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 and output device to realize functions such as signal processing, data storage, module control and timing control. The above-mentioned first charging module 5 can adopt a second conversion circuit composed of a rectifier, a field effect transistor and a resistor. The first charging circuit can rectify and filter the input electric energy and supply power to the connected lithium battery. When it is not connected to the lithium battery, it can be shunted for power supply. The 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 electric energy and supply power to the connected lithium battery. When it is not connected to the lithium battery, it can be shunted for power supply. The 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 electric energy and supply power to the connected lithium battery. When it is not connected to the lithium battery, it can be shunted for power supply. The 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 electric energy and supply power to the connected lithium battery. When it is not connected to the lithium battery, it can shunt the power supply; the bidirectional current expansion module 9 can adopt a bidirectional current expansion circuit composed of a field effect transistor, which can perform bidirectional transmission control of electric energy, realize the first charging module 5 to the fourth charging module 8 or the fourth charging module 8 to the first charging module 5 to perform current expansion processing, realize the second charging module 6 to the third charging module 7 or the third charging module 7 to the second charging module 6 to perform current expansion processing.

[0042] In another embodiment, see 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 microcontrol module 4 includes a first controller U1;

[0043] 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, and 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.

[0044] In a specific embodiment, the above-mentioned first controller U1 can be selected as an STM32 single-chip microcomputer; the above-mentioned first power transistor Q1, second power transistor Q2 and third power transistor Q3 can all be selected as N-channel field effect transistors, wherein 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, and the conduction of the third power transistor Q3 can reduce the magnetic flux of the first transformer B1, reduce the temperature, and complete a charging cycle; the above-mentioned second capacitor C1, first diode D1, third capacitor C3, second diode D2, third inductor L3 and first transformer B1 perform resonance regulation processing to achieve energy storage filtering and step-up voltage transformation processing.

[0045] 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;

[0046] 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.

[0047] In a specific embodiment, the above-mentioned 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 above-mentioned first interface is connected to the charging terminal of the lithium battery.

[0048] 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;

[0049] 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.

[0050] In a specific embodiment, the above-mentioned eighth power transistor Q8 can be selected as an N-channel field effect transistor to cooperate with the second resistor R2 for current expansion processing; the above-mentioned second interface is connected to the charging terminal of the lithium battery.

[0051] 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;

[0052] Specifically, the drain of the fourth power transistor Q 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 end of the electric energy conversion device through the second inductor. The drain of the sixth power transistor Q6 is connected to the first input end 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 end and the second output end 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.

[0053] In a specific embodiment, the above-mentioned fourth power transistor Q4, fifth power transistor Q5, and sixth power transistor Q6 can all be N-channel field-effect transistors. Among them, the fourth power transistor Q4 controls the power transmission, cooperates with the sixth power transistor Q6 and the second inductor to perform 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 power conversion device is the same as that of the above-mentioned first capacitor C1, second capacitor C1, third capacitor C3, first diode D1, second diode D2, and third inductor L3.

[0054] 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 a power control device and a fourth interface.

[0055] 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 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 grounding 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.

[0056] In a specific embodiment, the above-mentioned thirteenth power transistor Q13 can be an N-channel field-effect transistor, which cooperates with the third resistor R3 for shunt processing. The above-mentioned third interface and fourth interface can both 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 that of the above-mentioned fourth rectifier T4, sixth capacitor C6, thirteenth power transistor Q13, and third resistor R3.

[0057] 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.

[0058] 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 terminal of the second rectifier T2, the drain of the eleventh power transistor Q11 is connected to the third terminal 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 terminal of the third rectifier T3, and 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.

[0059] 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 for power transmission control.

[0060] In the intelligent lithium battery charging control system of a battery swapping cabinet in this embodiment, AC power is accessed through a power interface. 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 to control the second power transistor Q2 to conduct. The first inductor L1 stores and supplies power. 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. 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 to control the third power transistor Q3 to conduct, reducing the magnetic flux of the first transformer B1, lowering 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 power conversion device to achieve power 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 power 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 power 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 power control device to perform 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 boosting for the third charging module 7.

[0061] 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-limiting. 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.

[0062] 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 re-outputs 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 perform current boosting processing on the first charging module and the fourth charging module, perform current boosting processing on 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, voltage boosting, and dual-path 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 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, voltage boosting, and dual-path 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 the third electric energy; A first charging module connected to the first conversion module, for performing rectification filtering processing and shunt processing on the second electric energy, and outputting the fourth electric energy; A second charging module connected to the first conversion module, for performing rectification filtering processing and shunt processing on the second electric energy, and outputting the fifth electric energy; A third charging module connected to the second conversion module, for performing rectification filtering processing and shunt processing on the third electric energy, and outputting the sixth electric energy; A fourth charging module connected to the second conversion module, for performing rectification filtering processing and shunt processing on 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 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 controlling 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; 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 micro-control module includes a first controller; The drain of the fourth power transistor is connected to the third terminal 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 power conversion device through the second inductor. The drain of the sixth power transistor is connected to the first input terminal of the power conversion device. The source of the fifth power transistor is connected to the fourth terminal of the first rectifier. The ground terminal of the power conversion device is grounded. The first output terminal and the second output terminal of the power 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; 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 a power 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 terminal 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 terminal of the first rectifier, and the ground terminal 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; 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 terminal of the second rectifier. The drain of the eleventh power transistor is connected to the third terminal 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 terminal 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.

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 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, wherein 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, characterized in that, 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.

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