Battery swap control circuit and method based on power battery pack modularization and storage medium

Abstract

The application discloses a power battery pack modularized battery replacement control circuit and method and a storage medium, relates to the technical field of battery replacement control, and the circuit comprises a bidirectional battery replacement control circuit, a sampling circuit, a control circuit, a driving circuit and a power supply circuit; the input end of the bidirectional battery replacement control circuit is connected with a single battery module, the output end of the bidirectional battery replacement control circuit is connected with a vehicle power output port, the control circuit is connected with the battery module, the sampling circuit, the driving circuit and the power supply circuit, the bidirectional battery replacement control circuit is connected with the sampling circuit and the driving circuit, and the power supply circuit is connected with the sampling circuit and the driving circuit; wherein the sampling circuit is used for collecting the charging and discharging information of the battery module, the control circuit is used for generating a circuit control instruction based on the charging and discharging information, and the driving circuit is used for driving the bidirectional battery replacement control circuit to perform power battery pack modularized battery replacement control based on the circuit control instruction. The application improves the battery replacement control flexibility.

Description

Technical Field

[0001] This application relates to the field of battery swapping control technology, and in particular to a battery swapping control circuit, method and storage medium based on modular power battery packs. Background Technology

[0002] With the development of new energy vehicles, users have increasingly higher requirements for charging and discharging. They hope to ensure the normal operation of the battery while improving the portability of battery swapping, which also puts forward higher requirements for battery swapping control.

[0003] Traditional battery swapping control methods involve directly connecting multiple batteries in parallel and charging and discharging them simultaneously. This method suffers from poor modularity, integration difficulties, and high after-sales costs. Parallel connection requires precise voltage control of the battery packs, and different battery packs necessitate entirely new designs, further increasing costs and significantly hindering the industrialization of battery swapping. Summary of the Invention

[0004] The main objective of this application is to provide a battery swapping control circuit, method, and storage medium based on a modular power battery pack, aiming to solve the technical problem of how to improve the flexibility of battery swapping control.

[0005] To achieve the above objectives, this application provides a battery swapping control circuit based on a modular power battery pack, which includes a bidirectional battery swapping control circuit, a sampling circuit, a control circuit, a drive circuit, and a power supply circuit.

[0006] The input terminal of the bidirectional battery swapping control circuit is connected to a single battery module, and the output terminal of the bidirectional battery swapping control circuit is connected to the vehicle power output port. The control circuit is connected to the battery module, the sampling circuit, the drive circuit, and the power supply circuit respectively. The bidirectional battery swapping control circuit is connected to the sampling circuit and the drive circuit respectively. The power supply circuit is connected to the sampling circuit and the drive circuit.

[0007] The sampling circuit is used to collect the charging and discharging information of the battery module, the control circuit is used to generate circuit control commands based on the charging and discharging information, and the driving circuit is used to drive the bidirectional battery swapping control circuit to charge and discharge based on the circuit control commands.

[0008] Optionally, the bidirectional battery swapping control circuit includes a charging control circuit, a discharging control circuit, and an auxiliary circuit. The charging control circuit includes a first switching transistor, a first resistor, a second resistor, a first inductor, a first diode, and a third capacitor.

[0009] The first end of the first resistor is connected to the driving circuit. The second end of the first resistor is connected to the first end of the second resistor and the gate of the first switching transistor. The drain of the first switching transistor is connected to the sampling circuit and the auxiliary circuit. The source of the first switching transistor is connected to the second end of the second resistor and then to the discharge control circuit. The first end of the first inductor is connected to the cathode of the first diode and then to the discharge control circuit. The anode of the first diode is connected to the auxiliary circuit, the second end of the third capacitor, the sampling circuit, and the auxiliary circuit. The first end of the third capacitor is connected to the second end of the first inductor and then to the auxiliary circuit.

[0010] Optionally, the discharge control circuit includes a second switching transistor, a fourth resistor, and a third resistor;

[0011] The first end of the third resistor is connected to the driving circuit, the second end of the third resistor is connected to the first end of the fourth resistor and the gate of the second switch, the second end of the fourth resistor is connected to the source of the second switch and then to the source of the first switch, and the drain of the second switch is connected to the first end of the first inductor.

[0012] Optionally, the auxiliary circuit includes a shunt, a first common-mode inductor, a second common-mode inductor, a first capacitor, a second capacitor, and a fourth capacitor;

[0013] The first terminal of the fourth capacitor is connected to the sampling circuit, the positive terminal of the battery module, and the first terminal of the first common-mode inductor, respectively. The second terminal of the fourth capacitor is connected to the sampling circuit, the negative terminal of the battery module, and the second terminal of the first common-mode inductor, respectively. The third terminal of the first common-mode inductor is connected to the second terminal of the first inductor, and the fourth terminal of the first common-mode inductor is connected to the first terminal of the shunt and the sampling circuit, respectively. The second terminal of the shunt is connected to the anode of the first diode and the sampling circuit, respectively.

[0014] The first terminal of the second capacitor is connected to the drain of the first switching transistor, the sampling circuit, and the first terminal of the second common-mode inductor. The second terminal of the second capacitor is connected to the anode of the first diode, the sampling circuit, and the second terminal of the second common-mode inductor. The third terminal of the second common-mode inductor is connected to the first terminal of the first capacitor and the vehicle power output port. The fourth terminal of the second common-mode inductor is connected to the second terminal of the first capacitor and the vehicle power output port.

[0015] Optionally, the driving circuit includes a first driving chip and a second driving chip. The first driving chip is connected to the first control port of the microcontroller in the control circuit, the power supply circuit, and the first end of the first resistor, respectively. The second driving chip is connected to the second control port of the microcontroller in the control circuit, the power supply circuit, and the first end of the third resistor, respectively.

[0016] Optionally, the sampling circuit includes a current sampling circuit, a battery voltage sampling circuit, and an output voltage sampling circuit. The input terminal of the current sampling circuit is connected to the first terminal and the second terminal of the shunt, respectively. The output terminal of the current sampling circuit is connected to the first sampling port of the microcontroller in the control circuit, and the power supply terminal of the current sampling circuit is connected to the power supply circuit. The input terminal of the battery voltage sampling circuit is connected to the positive terminal and the negative terminal of the battery module, respectively. The output terminal of the battery voltage sampling circuit is connected to the second sampling port of the microcontroller in the control circuit, and the power supply terminal of the battery voltage sampling circuit is connected to the power supply circuit. The input terminal of the output voltage sampling circuit is connected to the first terminal and the second terminal of the second capacitor, respectively. The output terminal of the output voltage sampling circuit is connected to the third sampling port of the microcontroller in the control circuit, and the power supply terminal of the output voltage sampling circuit is connected to the power supply circuit.

[0017] Furthermore, to achieve the above objectives, the present invention also provides a battery swapping control method based on a modular power battery pack. This method is applied to the aforementioned battery swapping control circuit based on a modular power battery pack, and includes:

[0018] Acquire the collected charging and discharging information, and generate circuit control commands based on the charging and discharging information and preset charging and discharging index information;

[0019] Battery swapping control is performed based on the circuit control commands.

[0020] Optionally, the step of generating circuit control commands based on the charge / discharge information and preset charge / discharge index information includes:

[0021] The control mode is determined based on the charging and discharging information;

[0022] If the control mode is a charging control mode, then the charging current in the charging and discharging information is determined, and the rated charging current in the preset charging and discharging index information is determined.

[0023] If the rated charging current is greater than the charging current, a first duty cycle instruction is generated and used as a circuit control instruction; wherein, the first duty cycle instruction refers to the instruction to increase the duty cycle of the first switching transistor control signal;

[0024] If the rated charging current is less than the charging current, a second duty cycle instruction is generated and used as a circuit control instruction; wherein, the second duty cycle instruction refers to the instruction to reduce the duty cycle of the first switching transistor control signal;

[0025] Determine the battery voltage in the charge / discharge information, and determine the stop charging voltage value in the charge / discharge index information;

[0026] If the battery voltage is greater than the stop charging voltage value, a stop charging command is generated and used as a circuit control command.

[0027] Optionally, after determining the control mode based on the charging and discharging information, the method further includes:

[0028] If the control mode is a discharge control mode, then the discharge current in the charge and discharge information is determined, and the discharge overcurrent value in the preset charge and discharge index information is determined.

[0029] If the discharge current is greater than or equal to the discharge overcurrent value, a switch disconnect command is generated and used as a circuit control command; wherein, the switch disconnect command refers to the command to disconnect the second switch transistor;

[0030] If the discharge current is less than the discharge overcurrent value, a switch closing command is generated and used as a circuit control command; wherein, the switch closing command refers to the command to close the second switch transistor;

[0031] Determine the battery voltage in the charge / discharge information, and determine the stop-discharge voltage value in the charge / discharge index information;

[0032] If the battery voltage is less than the stop discharge voltage value, a stop discharge command is generated and used as a circuit control command.

[0033] This application also provides a storage medium storing a program for implementing a battery swapping control method based on a modular power battery pack. The program for implementing the battery swapping control method based on a modular power battery pack is executed by a processor to implement the steps of the battery swapping control method based on a modular power battery pack as described above.

[0034] The technical solution of this application provides a battery swapping control circuit based on a modular power battery pack, including a bidirectional battery swapping control circuit, a sampling circuit, a control circuit, a drive circuit, and a power supply circuit. The input terminal of the bidirectional battery swapping control circuit is connected to a single battery module, and the output terminal of the bidirectional battery swapping control circuit is connected to the vehicle's power output port. The control circuit is connected to the battery module, the sampling circuit, the drive circuit, and the power supply circuit, respectively. The bidirectional battery swapping control circuit is connected to both the sampling circuit and the drive circuit, and the power supply circuit is connected to both the sampling circuit and the drive circuit. The sampling circuit is used to collect charging and discharging information of the battery module, the control circuit is used to generate circuit control commands based on the charging and discharging information, and the drive circuit is used to drive the bidirectional battery swapping control circuit to charge and discharge based on the circuit control commands. The circuit control command is generated by charging and discharging information, and then the bidirectional battery swapping control circuit is driven by the drive circuit according to the circuit control command to perform battery swapping control. The battery swapping control includes charging and discharging, which can avoid the phenomenon of charging and discharging the battery at the same time without considering the actual situation of the battery. The battery swapping control circuit based on the modular power battery pack of this application can not only collect the charging and discharging information of the battery module to accurately detect and monitor the battery module and improve the accuracy of battery swapping control, but also generate circuit control commands by charging and discharging information and drive the bidirectional battery swapping control circuit according to the circuit control commands to perform battery swapping control, thereby improving the flexibility of battery swapping control. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of an embodiment of the battery swapping control circuit based on the modular design of a power battery pack according to the present invention.

[0038] Figure 2 This is a schematic diagram of the circuit connection of the bidirectional battery swapping control circuit in the modular battery swapping control circuit of the present invention.

[0039] Figure 3 This is a schematic diagram of the battery swapping control device structure based on a modular power battery pack, which is part of the hardware operating environment of the embodiment of the present invention.

[0040] Figure 4 This is a flowchart illustrating an embodiment of the battery swapping control method based on modular power battery packs of the present invention.

[0041] Figure 5 This is a schematic diagram of the parallel structure of battery modules in the modular battery swapping control circuit of the present invention.

[0042] Figure 6 This is a schematic diagram of another module in the modular battery swapping control circuit of the present invention.

[0043] Figure 7 This is a schematic diagram of a battery swapping control method based on modular power battery packs according to the present invention.

[0044] Explanation of icon numbers:

[0045]

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0049] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0050] To ensure clarity and brevity in the description of the following embodiments, a brief introduction is first given to the implementation of a battery swapping control circuit based on a modular power battery pack and a commonly used charging and discharging station system:

[0051] With the increasing popularity of electric vehicles, their use in daily life is becoming more and more common. Battery swapping solutions, as a direction for the development of electric vehicles, can solve the problem of long charging times, allowing drivers to quickly swap batteries and get back on the road. The swapping station can then recharge during off-peak hours. However, existing charging and discharging solutions directly control the simultaneous charging or discharging of the entire battery. This can lead to inconsistencies in the voltage of different battery modules, and blindly connecting them in parallel can cause uncontrolled short-circuit currents, which is detrimental to vehicle safety and battery module lifespan. Based on the above problems, this application proposes a technical solution to solve the problem of blindly charging or discharging different battery modules simultaneously.

[0052] This application discloses a battery swapping control circuit based on a modular power battery pack, comprising a bidirectional battery swapping control circuit, a sampling circuit, a control circuit, a drive circuit, and a power supply circuit. The input terminal of the bidirectional battery swapping control circuit is connected to a single battery module, and the output terminal is connected to the vehicle's power output port. The control circuit is connected to the battery module, the sampling circuit, the drive circuit, and the power supply circuit. The bidirectional battery swapping control circuit is also connected to the sampling circuit and the drive circuit. The power supply circuit is connected to both the sampling circuit and the drive circuit. The sampling circuit collects charging and discharging information from the battery module. The control circuit generates circuit control commands based on the charging and discharging information. The drive circuit drives the bidirectional battery swapping control circuit to charge and discharge based on the circuit control commands. The circuit control command is generated by charging and discharging information, and then the bidirectional battery swapping control circuit is driven by the drive circuit according to the circuit control command to perform battery swapping control. The battery swapping control includes charging and discharging, which can avoid the phenomenon of charging and discharging the battery at the same time without considering the actual situation of the battery. The battery swapping control circuit based on the modular power battery pack of this application can not only collect the charging and discharging information of the battery module to accurately detect and monitor the battery module and improve the accuracy of battery swapping control, but also generate circuit control commands by charging and discharging information and drive the bidirectional battery swapping control circuit according to the circuit control commands to perform battery swapping control, thereby improving the flexibility of battery swapping control.

[0053] This invention proposes a battery swapping control circuit based on the modular design of power battery packs.

[0054] In one embodiment of the present invention, such as Figure 1 As shown, Figure 1This is a schematic diagram of an embodiment of a battery swapping control circuit based on a modular power battery pack. The battery swapping control circuit based on a modular power battery pack includes: a bidirectional battery swapping control circuit 10, a sampling circuit 20, a control circuit 40, a drive circuit 30, and a power supply circuit 50.

[0055] The input terminal of the bidirectional battery swapping control circuit 10 is connected to a single battery module 100, and the output terminal of the bidirectional battery swapping control circuit 10 is connected to the vehicle power output port 200. The control circuit 40 is connected to the battery module 100, the sampling circuit 20, the drive circuit 30, and the power circuit 50, respectively. The bidirectional battery swapping control circuit 10 is connected to the sampling circuit 20 and the drive circuit 30, respectively, and the power circuit 50 is connected to the sampling circuit 20 and the drive circuit 30.

[0056] The sampling circuit 20 is used to collect the charging and discharging information of the battery module 100, the control circuit 40 is used to generate circuit control commands based on the charging and discharging information, and the driving circuit 30 is used to drive the bidirectional battery swapping control circuit 10 to charge and discharge based on the circuit control commands.

[0057] For example, refer to Figure 5 , Figure 5 This diagram illustrates the parallel structure of battery modules in a modular battery swapping control circuit. The vehicle battery is modularized into battery modules 1110 to n1n0, each connected to its respective modular battery swapping control circuit 1310 to n3n0. This allows for individual control of battery modules 1110 to n1n0, rather than blindly charging and discharging simultaneously. The outputs of battery modules 1110 to n1n0, controlled by the modular battery swapping control circuits 1310 and n3n0, are connected to the vehicle's power output port 200 or charging interface, enabling separate charging and discharging of each module. Battery modules 1110 to n1n0 refer to the vehicle's power supply battery being divided into multiple modules and individually controlled, including at least the batteries within each module and other protective batteries or externally connected devices. Furthermore, the flexibility of battery swapping control can be improved by controlling each individual battery module separately.

[0058] In this embodiment, when the vehicle battery is divided into multiple parallel modules, each battery module 100 is connected to the vehicle power output port 200 or charging interface through a battery swapping control circuit 300 based on the modular power battery pack. (Refer to...) Figure 5For example, the positive terminals of Modulex+ (the xth battery module) among the 100 battery modules are ultimately connected together through a battery swapping control circuit 300 based on the modular design of the power battery pack, and the negative terminals of Modulex- (the xth battery module) are also ultimately connected together through the same circuit. The CANH and CANL terminals among the 100 battery modules are interconnected. (Refer to...) Figure 6 , Figure 6 This is a schematic diagram of another module in the modular battery swapping control circuit based on the power battery pack. Referring to Figure c, the function of the power supply circuit 50 is to use the 12V power supply from the low-voltage battery as input, and generate isolated 15V and 5V power supplies through the isolated power supply module to power the drive circuit 30, sampling circuit 20, and control circuit 40. The power supply circuit 50 can be a DC-DC converter chip or a circuit. For example, the 12V power supply from the low-voltage battery can be grounded through resistors of 7Ω and 5Ω, and then the output terminal can be connected between the 7Ω and 5Ω resistors for output, resulting in an output voltage of 12 / (7+5)*5 = 5V.

[0059] For example, when the sampling circuit 20 collects the charging and discharging information of each battery module, it performs battery swapping control. Here, battery swapping includes charging and discharging, and this is explained using a single battery module. If the sampling circuit 20 collects the charging and discharging information of battery module 1110, it generates circuit control commands based on this information, and finally drives the bidirectional battery swapping control circuit 10 to charge and discharge based on the driving circuit 30 using these circuit control commands. The charging and discharging information refers to the actual charging and discharging information of battery module 1110, which may include the current and voltage magnitudes collected by the sampling circuit 20. The specific current and voltage values ​​collected are determined according to actual needs. The circuit control commands are the commands of the control circuit corresponding to the collected charging and discharging information. For example, if the charging current is too high, the circuit control command stops charging battery module 1110; if the current and voltage magnitudes of the circuit match the current and voltage magnitudes of a fully charged state, the circuit control command stops charging battery module 1110; if the current and voltage magnitudes of the circuit match the current and voltage magnitudes of an abnormal discharge state, the circuit control command stops discharging battery module 1110. This allows for controlled charging and discharging of battery modules with different voltages connected in parallel. Simultaneously, during driving, if a battery module malfunctions, its charging and discharging circuit is disconnected, allowing other modules to continue as a safe power source, enabling the electric vehicle to continue driving safely. Improving battery swapping control based on the charging and discharging information of each battery module enhances the driver's user experience and the modularity of battery swapping products. By treating the battery system as a modular system, the integrability, convenience, and accuracy of battery swapping control are improved.

[0060] The battery swapping control circuit based on the modular power battery pack in this embodiment includes a bidirectional battery swapping control circuit, a sampling circuit, a control circuit, a drive circuit, and a power supply circuit. The input terminal of the bidirectional battery swapping control circuit is connected to a single battery module, and the output terminal of the bidirectional battery swapping control circuit is connected to the vehicle's power output port. The control circuit is connected to the battery module, the sampling circuit, the drive circuit, and the power supply circuit, respectively. The bidirectional battery swapping control circuit is connected to both the sampling circuit and the drive circuit, and the power supply circuit is connected to both the sampling circuit and the drive circuit. The sampling circuit is used to collect charging and discharging information from the battery module. The control circuit is used to generate circuit control commands based on the charging and discharging information. The drive circuit is used to drive the bidirectional battery swapping control circuit to charge and discharge based on the circuit control commands. The circuit control command is generated by charging and discharging information, and then the bidirectional battery swapping control circuit is driven by the drive circuit according to the circuit control command to perform battery swapping control. The battery swapping control includes charging and discharging, which can avoid the phenomenon of charging and discharging the battery at the same time without considering the actual situation of the battery. The battery swapping control circuit based on the modular power battery pack of this application can not only collect the charging and discharging information of the battery module to accurately detect and monitor the battery module and improve the accuracy of battery swapping control, but also generate circuit control commands by charging and discharging information and drive the bidirectional battery swapping control circuit according to the circuit control commands to perform battery swapping control, thereby improving the flexibility of battery swapping control.

[0061] In one embodiment, reference is made to... Figure 2 , Figure 2 This is a schematic diagram of the charging harness module in a modular battery swapping control circuit based on a power battery pack. The bidirectional battery swapping control circuit 10 includes a charging control circuit, a discharging control circuit, and an auxiliary circuit. The charging control circuit includes a first switch Q1, a first resistor R1, a second resistor R2, a first inductor L1, a first diode D1, and a third capacitor C3.

[0062] The first end of the first resistor R1 is connected to the driving circuit 30. The second end of the first resistor R1 is connected to the first end of the second resistor R2 and the gate of the first switching transistor Q1. The drain of the first switching transistor Q1 is connected to the sampling circuit 20 and the auxiliary circuit. The source of the first switching transistor Q1 is connected to the second end of the second resistor R2 and then to the discharge control circuit. The first end of the first inductor L1 is connected to the cathode of the first diode D1 and then to the discharge control circuit. The anode of the first diode D1 is connected to the auxiliary circuit, the second end of the third capacitor C3, the sampling circuit 20, and the auxiliary circuit. The first end of the third capacitor C3 is connected to the second end of the first inductor L1 and then to the auxiliary circuit.

[0063] Specifically, the discharge control circuit includes a second switch Q2, a fourth resistor R4, and a third resistor R3;

[0064] The first end of the third resistor R3 is connected to the driving circuit 30. The second end of the third resistor R3 is connected to the first end of the fourth resistor R4 and the gate of the second switch Q2. The second end of the fourth resistor R4 is connected to the source of the second switch Q2 and then to the source of the first switch Q1. The drain of the second switch Q2 is connected to the first end of the first inductor L1.

[0065] Specifically, the auxiliary circuit includes a shunt FL, a first common-mode inductor GL1, a second common-mode inductor GL2, a first capacitor C1, a second capacitor C2, and a fourth capacitor C4;

[0066] The first terminal of the fourth capacitor C4 is connected to the sampling circuit 20, the positive terminal of the battery module 100, and the first terminal of the first common-mode inductor GL1, respectively. The second terminal of the fourth capacitor C4 is connected to the sampling circuit 20, the negative terminal of the battery module 100, and the second terminal of the first common-mode inductor GL1, respectively. The third terminal of the first common-mode inductor GL1 is connected to the second terminal of the first inductor L1, and the fourth terminal of the first common-mode inductor GL1 is connected to the first terminal of the shunt FL and the sampling circuit 20, respectively. The second terminal of the shunt FL is connected to the anode of the first diode D1 and the sampling circuit 20, respectively.

[0067] The first terminal of the second capacitor C2 is connected to the drain of the first switching transistor Q1, the sampling circuit 20, and the first terminal of the second common-mode inductor GL2. The second terminal of the second capacitor C2 is connected to the anode of the first diode D1, the sampling circuit 20, and the second terminal of the second common-mode inductor GL2. The third terminal of the second common-mode inductor GL2 is connected to the first terminal of the first capacitor C1 and the vehicle power output port 200. The fourth terminal of the second common-mode inductor GL2 is connected to the second terminal of the first capacitor C1 and the vehicle power output port 100.

[0068] In this embodiment, the bidirectional battery swapping control circuit 10 implements battery swapping control for each parallel battery module based on the modular design of the power battery pack through a charging control circuit and a discharging control circuit, respectively. The charging control circuit controls the first switch Q1 to achieve charging control after determining the control command; the discharging control circuit controls the second switch Q2 to achieve discharging control after determining the control command. VEE is a negative power supply voltage, used to control the conduction and closing control of the first switch Q1 and the second switch Q2, ensuring flexibility in controlling the first switch Q1 and the second switch Q2. Module+ and Module- are the positive and negative terminals output to the vehicle power output port 200. (See reference...) Figure 2 During charging, the Charger's control signal controls the first switch Q1 to determine whether charging should proceed. If the charging current is too high, self-protection is required. The Charger outputs a low level to turn off the first switch Q1, thereby disconnecting the battery module from the charging port and protecting the battery. During discharging, the Discharger's control signal controls the second switch Q2 to determine whether discharging should proceed. If the discharging current is too high, self-protection is required. The Discharger outputs a low level to turn off the second switch Q2, thereby disconnecting the battery module from the discharge port (i.e., the vehicle's power output port 200) and protecting the battery. Alternatively, if the battery itself is malfunctioning, and a low battery voltage is detected or matches the voltage at the time of the malfunction, the Discharger outputs a low level to turn off the second switch Q2, disconnecting the battery module from the discharge port and preventing power supply to a single malfunctioning battery module, thus ensuring the accuracy of the entire battery swapping control.

[0069] In yet another embodiment, reference is made to... Figure 6 , Figure 6 This is a schematic diagram of another module in a modular battery swapping control circuit based on a power battery pack. The drive circuit includes a first drive chip U1 and a second drive chip U2. The first drive chip U1 is connected to the first control port of the microcontroller in the control circuit 40, the power supply circuit 50, and the first end of the first resistor R1, respectively. The second drive chip U2 is connected to the second control port of the microcontroller in the control circuit 40, the power supply circuit 50, and the first end of the third resistor R3, respectively.

[0070] Specifically, the sampling circuit 20 includes a current sampling circuit, a battery voltage sampling circuit, and an output voltage sampling circuit. The input terminal of the current sampling circuit is connected to the first terminal and the second terminal of the shunt FL, respectively. The output terminal of the current sampling circuit is connected to the first sampling port of the microcontroller in the control circuit 40, and the power supply terminal of the current sampling circuit is connected to the power supply circuit 50. The input terminal of the battery voltage sampling circuit is connected to the positive terminal and the negative terminal of the battery module 100, respectively. The output terminal of the battery voltage sampling circuit is connected to the second sampling port of the microcontroller in the control circuit 40, and the power supply terminal of the battery voltage sampling circuit is connected to the power supply circuit 50. The input terminal of the output voltage sampling circuit is connected to the first terminal and the second terminal of the second capacitor C2, respectively. The output terminal of the output voltage sampling circuit is connected to the third sampling port of the microcontroller in the control circuit 40, and the power supply terminal of the output voltage sampling circuit is connected to the power supply circuit 50.

[0071] In this embodiment, refer to Figure 6 In the diagram of region b, sampling circuit 20 includes a current sampling circuit, a battery voltage sampling circuit, and an output voltage sampling circuit. The current sampling circuit is connected to... Figure 2 The I+ and I- positions in the diagram indicate the connection of the battery voltage sampling circuit. Figure 2 The Bat+ and Bat- positions in the diagram indicate the connection of the output voltage sampling circuit. Figure 2 The positions of VB+ and VB- are specified. They are connected via a current sampling circuit, a battery voltage sampling circuit, and an output voltage sampling circuit, respectively. Figure 2 The location of the sensor is used to collect current, battery voltage, and output voltage. The current / voltage acquisition circuit can be a data acquisition chip or a commonly used acquisition circuit; no specific limitation is made here. (See reference...) Figure 6 In the diagram of region d, after the current, battery voltage, and output voltage are output to the control circuit 40, the I in the current sampling circuit is connected to the I in the control circuit 40; the Bat_V in the battery voltage sampling circuit is connected to the Bat_V in the control circuit 40; and the VB_V in the output voltage sampling circuit is connected to the VB_V in the control circuit 40. This allows the current and voltage to be acquired by the microcontroller in the control circuit. The microcontroller outputs charging (Charge_Driver) and discharging (DisCharge_Driver) signals, which are then sent to the drive circuit 30 as control input signals to drive the drive circuit (actually driving the first switch Q1 and the second switch Q2 to conduct). The drive circuit 30 outputs drive signals Gcharge and Gdischarge, thereby controlling the charging and discharging current. Through the CAN (Controller Area Network) communication module, the microcontroller control modules of different battery modules exchange signals. (Refer to...) Figure 6 In the diagram of region a, the first driver chip U1 and the second driver chip U2 can also be microcontroller chips, outputting different output signals according to different input signals. The operation of the entire sampling circuit 20 is as follows:

[0072] The battery voltage sampling circuit of sampling circuit 20 obtains the total input voltage values ​​of Bat+ and Bat- of battery module 100 in bidirectional battery swapping control circuit 10. The analog signal Bat_V of battery voltage sampling circuit is output to the AD port of microcontroller in control circuit 40 to obtain the total voltage value at the battery end.

[0073] The total input voltage values ​​of the module terminals Module+ and Module- of the bidirectional battery swapping control circuit 10 are obtained through the output voltage sampling circuit of sampling circuit 20. The analog signal VB_V of the output voltage sampling circuit is output to the AD port of the microcontroller in the control circuit 40 to obtain the total voltage value of the module terminal.

[0074] The I+ and I- input signals at both ends of the bidirectional power swapping control circuit 10 are obtained through the current sampling circuit of sampling circuit 20. The analog signal I of the current sampling circuit is output to the AD port of the microcontroller in control circuit 40 to obtain the high voltage circuit current value. Based on the current value, it can be determined whether the mode is charging mode or discharging mode (charging current is positive value, discharging current is negative value).

[0075] The control process of control circuit 40 is as follows:

[0076] Based on the collected total voltage value at the battery end, total voltage value at the module end, and high voltage circuit current value, the microcontroller in the control circuit 40 outputs a high-level and low-level control signal Discharger_Driver to the drive circuit 40, which drives U4 in the drive circuit 40 to generate high and low Gdischarge signals with high current driving capability. The Gdischarge signals drive the second switch Q2 of the bidirectional battery swapping control circuit 10 to complete the operation of closing and opening the discharge second switch Q2.

[0077] Based on the collected total voltage value at the battery terminal, total voltage value at the module terminal, and high-voltage circuit current value, the microcontroller in the control circuit 40 outputs the control signal Charger_DriverPWM signal to the drive circuit 40, which drives U3 in the drive circuit 40 to generate a Gcharge signal with high current driving capability. The GchargePWM signal drives the first switch Q1 of the bidirectional battery swapping control circuit 10 to complete the operation of closing and opening the discharge first switch Q1.

[0078] By collecting the total voltage value at the battery terminal, the total voltage value at the module terminal, and the high-voltage circuit current value of each battery module, and then performing various controls based on the total voltage value at the battery terminal, the flexibility of battery swapping control based on the modular design of the power battery pack can be guaranteed.

[0079] like Figure 3 As shown, the modular battery swapping control device based on the power battery pack may include: a processor 0003, such as a central processing unit (CPU), a communication bus 0001, an acquisition interface 0002, a processing interface 0004, and a memory 0005. The communication bus 0001 is used to enable communication between these components. The acquisition interface 0002 may include an information acquisition device or acquisition unit, such as a computer; optionally, the acquisition interface 0002 may also include a standard wired interface or a wireless interface. The processing interface 0004 may optionally include a standard wired interface or a wireless interface. The memory 0005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 0005 may also be a storage device independent of the aforementioned processor 0003.

[0080] Those skilled in the art will understand that Figure 3 The structure shown does not constitute a limitation on the battery swapping control device based on the modular power battery pack, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0081] like Figure 3 As shown, the memory 0005, which serves as a storage medium, may include an operating system, an acquisition interface module, a processing interface module, and a battery swapping control program based on the modular design of the power battery pack.

[0082] exist Figure 3 In the modular battery swapping control device shown, the communication bus 0001 is mainly used to realize the connection and communication between components; the acquisition interface 0002 is mainly used to connect to the backend server and communicate with the backend server; the processing interface 0004 is mainly used to connect to the deployment end (user end) and communicate with the deployment end. The processor 0003 and memory 0005 in the modular battery swapping control device of the present invention can be set in the modular battery swapping control device. The modular battery swapping control device calls the modular battery swapping control program stored in the memory 0005 through the processor 0003 and executes the modular battery swapping control method provided in the embodiment of the present invention.

[0083] Furthermore, refer to, for example Figure 4 As shown, based on the above-described embodiment of the modular power battery pack-based battery swapping control circuit, a flowchart of an embodiment of the present invention's modular power battery pack-based battery swapping control method is presented. The steps of the modular power battery pack-based battery swapping control method include:

[0084] Step S10: Acquire the collected charging and discharging information, and generate circuit control commands based on the charging and discharging information and preset charging and discharging index information;

[0085] In this embodiment, current and voltage information of a single battery module and the bidirectional battery swapping control circuit are collected by a data acquisition circuit. The collected total voltage value at the battery terminal, total voltage value at the module terminal, and high-voltage circuit current value serve as charging and discharging information. Circuit control commands are generated based on this charging and discharging information and preset charging and discharging index information. The preset charging and discharging index information refers to preset limits on charging and discharging in terms of at least current and voltage, such as maximum charging voltage, maximum discharging voltage, full charge voltage, and full discharge voltage. The circuit control commands are instructions to control the bidirectional battery swapping control circuit to conduct charging and discharging or to disconnect charging and discharging. Thus, battery swapping control based on the modular design of the power battery pack can be performed on each battery module, ensuring the accuracy of battery swapping control after modularization of the power battery pack.

[0086] Step S20: Perform battery swapping control based on the circuit control command.

[0087] In this embodiment, when the circuit control command determined by the charging and discharging information is the battery control command for idle states, each battery module will be controlled in the idle state based on the circuit control command. For example, the first switch Q1 is controlled by the battery module's modular power battery pack-based battery swapping control circuit. The first switch Q1 is an IGBT (Insulated Gate Bipolar Transistor). A PWM (Pulse Width Modulation) 100% duty cycle drives the bidirectional battery swapping control circuit to charge the first switch Q1. Simultaneously, the second switch Q2 is controlled by the battery module's modular power battery pack-based battery swapping control circuit. The second switch Q2 is also an IGBT. Closing the bidirectional battery swapping control circuit charges the second switch Q2. This achieves idle state control. Other control methods can also be used, which are not limited here. This idle control method ensures the accuracy of the battery swapping control based on the modular power battery pack.

[0088] Furthermore, based on the first embodiment of the battery swapping control method based on modular power battery packs, a second embodiment of the battery swapping control method based on modular power battery packs of this application is proposed. The step of generating circuit control commands based on the charging and discharging information and preset charging and discharging index information includes:

[0089] Step S11: Determine the control mode based on the charging and discharging information;

[0090] Step S12: If the control mode is a charging control mode, then determine the charging current in the charging and discharging information, and determine the rated charging current in the preset charging and discharging index information.

[0091] In this embodiment, on the one hand, if the output voltage VB_V is greater than the battery voltage Bat_V, it is determined that the system is entering the charging control mode, i.e., the charging closed-loop control mode; if the output voltage VB_V is less than the battery voltage Bat_V, it is determined that the system is entering the discharging control mode, i.e., the discharging closed-loop control mode; and if the output voltage VB_V is equal to the battery voltage Bat_V, it is determined that the system is entering the idle control mode. On the other hand, the control mode can be determined by the high-voltage circuit current value in the charging and discharging information. That is, the actual current flow direction is determined by determining the sign of the current value, thereby determining whether it is the discharging mode or the charging mode. For example, the current value is acquired through the acquisition circuit. If the current value is greater than 0, the system enters the charging closed-loop control mode; if the current value is less than 0, the system enters the discharging closed-loop control mode; and if the current value is equal to 0, the system enters the idle control mode.

[0092] When the control mode is charging control mode, the system determines whether charging is normal by determining the charging current in the charging and discharging information and the rated charging current in the preset charging and discharging index information. Here, the charging current refers to the current value collected at both ends of the shunt, and the rated charging current refers to the maximum charging current during charging to protect the battery module. The determination of the rated charging current and the charging current provides the basis for charging control; this could also be based on voltage, which is not limited here.

[0093] Step S13: If the rated charging current is greater than the charging current, a first duty cycle instruction is generated and used as a circuit control instruction; wherein, the first duty cycle instruction refers to the instruction to increase the duty cycle of the first switching transistor control signal.

[0094] Step S14: If the rated charging current is less than the charging current, a second duty cycle instruction is generated and used as a circuit control instruction; wherein, the second duty cycle instruction refers to the instruction to reduce the duty cycle of the first switching transistor control signal.

[0095] In this embodiment, when the rated charging current is greater than the charging current, it can be determined that the charging current is insufficient, and a first duty cycle command is generated and used as a circuit control command. The first duty cycle command refers to the command to increase the duty cycle of the first switching transistor control signal. When the rated charging current is less than the charging current, it can be determined that the charging current is excessive, and a second duty cycle command is generated and used as a circuit control command. The second duty cycle command refers to the command to decrease the duty cycle of the first switching transistor control signal. When the rated charging current equals the charging current, it can be determined that the charging current is moderate, and no control processing is performed. This ensures the accuracy of charging control and protects the battery modules under the modular power battery pack swapping control circuit. When the rated charging current is less than the charging current, the first charging switch Q1 in the bidirectional charge-discharge control circuit is controlled by the battery pack modular swapping control circuit to reduce the PWM duty cycle. When the rated charging current is greater than the charging current, the first charging switch Q1 in the bidirectional charge-discharge control circuit is controlled by the battery pack modular swapping control circuit to increase the PWM duty cycle. When the rated charging current is greater than the charging current, the first charging switch Q1 in the bidirectional charge-discharge control circuit is controlled by the battery pack modular swapping control circuit to maintain the PWM duty cycle and drive the first charging switch Q1 in the bidirectional charge-discharge control circuit. This enables charging control of the battery module.

[0096] Step S15: Determine the battery voltage in the charge / discharge information and determine the stop charging voltage value in the charge / discharge index information;

[0097] Step S16: If the battery voltage is greater than the stop charging voltage value, a stop charging command is generated and the stop charging command is used as a circuit control command.

[0098] In this embodiment, when controlling the charging process to full charge, the battery voltage in the charge / discharge information can be determined, and then the stop charging voltage value in the charge / discharge index information can be determined. When the battery voltage is greater than the stop charging voltage value, charging is stopped. Here, the battery voltage refers to Bat_V, and the stop charging voltage value refers to a preset stop charging voltage threshold. On the other hand, the first voltage difference in the charge / discharge information is also determined, along with the stop charging voltage difference and stop charging current threshold in the charge / discharge index information. Here, the first voltage difference refers to the difference between the battery voltage and the input voltage in the charge / discharge information, i.e., the difference between VB_V and Bat_V; the stop charging voltage difference refers to the difference between VB_V and Bat_V when fully charged; and the stop charging current threshold refers to the current value when fully charged. When the first voltage difference is less than the stop charging voltage difference and the charging current is less than the stop charging current threshold, it indicates that the battery is fully charged. A stop charging command will be generated and used as a circuit control command. The stop charging command is an instruction to disconnect the charging port, which can be achieved by directly disconnecting the first switch Q1. This enables charging control of the battery module and ensures the accuracy of the battery module charging control.

[0099] Furthermore, based on the first and / or second embodiments of the battery swapping control method based on modular power battery packs, a third embodiment of the battery swapping control method based on modular power battery packs of this application is proposed. After the step of determining the control mode based on the charging and discharging information, the method includes:

[0100] Step A12: If the control mode is a discharge control mode, then determine the discharge current in the charge and discharge information, and determine the discharge overcurrent value in the preset charge and discharge index information.

[0101] In this embodiment, when the control mode is discharge control mode, the system determines whether the discharge is normal by determining the discharge current in the charge / discharge information and the discharge overcurrent value in the preset charge / discharge index information. Here, the discharge current refers to the current value collected at both ends of the shunt, and the discharge overcurrent value refers to the maximum discharge current during discharge to protect the battery module. The determination of the discharge overcurrent value and discharge current provides the basis for discharge control; however, voltage determination could also be used, and this is not limited to this specific method.

[0102] Step A13: If the discharge current is greater than or equal to the discharge overcurrent value, a switch disconnection command is generated and used as a circuit control command; wherein, the switch disconnection command refers to the command to disconnect the second switch.

[0103] Step A14: If the discharge current is less than the discharge overcurrent value, a switch closing command is generated and used as a circuit control command; wherein, the switch closing command refers to the command to close the second switch.

[0104] In this embodiment, when the discharge current is less than the discharge overcurrent value, it can be determined that the discharge current is insufficient, and a switch closing command is generated, which is used as a circuit control command. The switch closing command refers to the command to close the second switch. When the discharge current is greater than or equal to the discharge overcurrent value, it can be determined that the discharge current is excessive, and a switch opening command is generated, which is used as a circuit control command. The switch opening command refers to the command to open the second switch. Alternatively, when the discharge current equals the discharge overcurrent value, it can be determined that the discharge current is moderate, and no control processing is performed. This ensures the accuracy of charging control and protects the battery modules under the modular power battery pack swapping control circuit. For example, when the discharge current is greater than or equal to the discharge overcurrent value, the second switch Q2 for charging is controlled by the modular power battery pack swapping control circuit, opening the second switch Q2 for charging in the bidirectional charge-discharge control circuit; when the discharge current is less than the discharge overcurrent value, the second switch Q2 for charging is controlled by the modular power battery pack swapping control circuit, closing the second switch Q2 for charging in the bidirectional charge-discharge control circuit. This enables the discharge control of the battery module.

[0105] Step A15: Determine the battery voltage in the charge / discharge information and determine the stop discharge voltage value in the charge / discharge index information;

[0106] Step S16: If the battery voltage is less than the stop discharge voltage value, a stop discharge command is generated and the stop discharge command is used as a circuit control command.

[0107] In this embodiment, when controlling insufficient discharge, on the one hand, the battery voltage in the charge / discharge information can be determined, and then the stop discharge voltage value in the charge / discharge index information can be determined. When the battery voltage is less than the stop discharge voltage value, discharge is stopped. Here, the battery voltage refers to Bat_V, and the stop discharge voltage value refers to a preset stop discharge voltage threshold. On the other hand, the second voltage difference in the charge / discharge information can also be determined, along with the stop discharge voltage difference and the stop discharge current threshold in the charge / discharge index information. Here, the second voltage difference refers to the difference between the battery voltage and the input voltage in the charge / discharge information, i.e., the difference between VB_V and Bat_V; the stop discharge voltage difference refers to the difference between VB_V and Bat_V when the battery is low; and the stop discharge current threshold refers to the current value when the battery is low. When the second voltage difference is less than the stop discharge voltage difference and the discharge current is less than the stop discharge current threshold, it indicates that the battery power is insufficient. A stop discharge command will be generated and used as a circuit control command. The stop discharge command is a command to disconnect the discharge port, which can be achieved by directly disconnecting the second switch Q2. This realizes the discharge control of the battery module and ensures the accuracy of the battery module discharge control.

[0108] Furthermore, refer to Figure 7 , Figure 7This is a flowchart illustrating a battery swapping control method based on modular power battery packs. In this embodiment, a host computer is used to configure addresses for each battery module's electronic control system via a CAN communication module. The main control module is configured with an address of 0x0001 (which can be calibrated), while the others are slave control modules. The battery modules are physically connected in parallel. The battery module electronic control system refers to the aforementioned battery swapping control circuit based on modular power battery packs. The CAN communication module refers to a module that transmits high and low voltage levels, or it can refer to various communication protocol network modules. The entire process essentially involves address calibration control for each battery module, and the microcontrollers in the entire control circuit can be shared. The microcontroller in the control circuit of the main control module, such as battery module 1, obtains the configuration addresses of the slave control modules via the CAN communication module and network broadcast commands. This means obtaining the configuration addresses of the battery module electronic control systems other than the main control module's system. Alternatively, the control modules can feedback their configured addresses via their respective CAN communication modules. The main control module broadcasts commands to the control systems of each battery module via the CAN communication module, essentially issuing a command to start operation. This allows each battery module control system to read the total battery voltage (i.e., the aforementioned battery voltage), the total voltage of the module itself (i.e., the aforementioned output voltage), the high-voltage circuit current, and determine its operating mode (current sign determination). Based on the determination, it enters a closed-loop charging control mode, a closed-loop discharging control mode, or an idle control mode. After completing closed-loop control, it returns to reading the total battery voltage from each battery module control system, continuously cycling through these modes. If the system is determined to be charging, it enters the closed-loop charging control mode; if it is determined to be discharging, it enters the closed-loop discharging control mode; and if it is determined to be idle, it enters the idle control mode. This allows for the control of different modes for the parallel battery modules based on the collected voltage and current information, ensuring the accuracy of the modular battery swapping control.

[0109] The present invention also provides a battery swapping control device based on a modular power battery pack.

[0110] The device of the present invention includes: a memory, a processor, and a battery swapping control program based on a modular power battery pack stored in the memory and executable on the processor. When the battery swapping control program based on a modular power battery pack is executed by the processor, it implements the steps of the battery swapping control method based on a modular power battery pack as described above.

[0111] The present invention also provides a storage medium.

[0112] The storage medium can be a computer-readable storage medium. The storage medium of the present invention stores a battery swapping control program based on the modular design of the power battery pack. When the battery swapping control program based on the modular design of the power battery pack is executed by the processor, it implements the steps of the battery swapping control method based on the modular design of the power battery pack as described above.

[0113] The method implemented when the battery swapping control program based on the modular power battery pack running on the processor is executed can be referred to in various embodiments of the battery swapping control method based on the modular power battery pack of the present invention, and will not be repeated here.

[0114] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A battery swap control circuit based on power battery pack modularization, characterized in that, The battery swapping control circuit based on the modular design of the power battery pack includes a bidirectional battery swapping control circuit, a sampling circuit, a control circuit, a drive circuit, and a power supply circuit. The input terminal of the bidirectional battery swapping control circuit is connected to a single battery module, and the output terminal of the bidirectional battery swapping control circuit is connected to the vehicle power output port. The control circuit is connected to the battery module, the sampling circuit, the drive circuit, and the power supply circuit respectively. The bidirectional battery swapping control circuit is connected to the sampling circuit and the drive circuit respectively. The power supply circuit is connected to the sampling circuit and the drive circuit. The bidirectional battery swapping control circuit includes a charging control circuit, a discharging control circuit, and an auxiliary circuit. The charging control circuit includes a first switching transistor, the discharging control circuit includes a second switching transistor, and the auxiliary circuit includes a shunt and a second capacitor. The sampling circuit is used to collect the charging and discharging information of the battery module. This information includes the total battery terminal voltage between the two ends of the second capacitor, the total module terminal voltage of the power battery pack, and the high-voltage circuit current value on the shunt. The control circuit generates circuit control commands based on the charging and discharging information. The drive circuit drives the bidirectional battery swapping control circuit to charge and discharge based on the circuit control commands. Following the step of generating circuit control commands based on the charging and discharging information, the following steps are included: If the control mode is discharge control mode, then the high-voltage circuit current value in the charge / discharge information is determined, and the discharge overcurrent value in the preset charge / discharge index information is determined; if the high-voltage circuit current value is greater than or equal to the discharge overcurrent value, then a switch disconnect command is generated, and the switch disconnect command is used as a circuit control command; wherein, the switch disconnect command refers to the command to disconnect the second switch; if the high-voltage circuit current value is less than the discharge overcurrent value, then a switch close command is generated, and the switch close command is used as a circuit control command; wherein, the switch close command refers to the command to close the second switch; the total battery terminal voltage value in the charge / discharge information is determined, and the stop discharge voltage value in the charge / discharge index information is determined; if the total battery terminal voltage value is less than the stop discharge voltage value, then a stop discharge command is generated, and the stop discharge command is used as a circuit control command.

2. The power battery pack modularized battery swap control circuit according to claim 1, wherein, The charging control circuit includes a first resistor, a second resistor, a first inductor, a first diode, and a third capacitor; The first end of the first resistor is connected to the driving circuit. The second end of the first resistor is connected to the first end of the second resistor and the gate of the first switching transistor. The drain of the first switching transistor is connected to the sampling circuit and the auxiliary circuit. The source of the first switching transistor is connected to the second end of the second resistor and then to the discharge control circuit. The first end of the first inductor is connected to the cathode of the first diode and then to the discharge control circuit. The anode of the first diode is connected to the auxiliary circuit, the second end of the third capacitor, the sampling circuit, and the auxiliary circuit. The first end of the third capacitor is connected to the second end of the first inductor and then to the auxiliary circuit.

3. The power battery pack modularized battery swap control circuit according to claim 2, wherein, The discharge control circuit includes a fourth resistor and a third resistor; The first end of the third resistor is connected to the driving circuit, the second end of the third resistor is connected to the first end of the fourth resistor and the gate of the second switch, the second end of the fourth resistor is connected to the source of the second switch and then to the source of the first switch, and the drain of the second switch is connected to the first end of the first inductor.

4. The power battery pack modularized battery swap control circuit according to claim 3, wherein, The auxiliary circuit includes a first common-mode inductor, a second common-mode inductor, a first capacitor, and a fourth capacitor; The first terminal of the fourth capacitor is connected to the sampling circuit, the positive terminal of the battery module, and the first terminal of the first common-mode inductor, respectively. The second terminal of the fourth capacitor is connected to the sampling circuit, the negative terminal of the battery module, and the second terminal of the first common-mode inductor, respectively. The third terminal of the first common-mode inductor is connected to the second terminal of the first inductor, and the fourth terminal of the first common-mode inductor is connected to the first terminal of the shunt and the sampling circuit, respectively. The second terminal of the shunt is connected to the anode of the first diode and the sampling circuit, respectively. The first terminal of the second capacitor is connected to the drain of the first switching transistor, the sampling circuit, and the first terminal of the second common-mode inductor. The second terminal of the second capacitor is connected to the anode of the first diode, the sampling circuit, and the second terminal of the second common-mode inductor. The third terminal of the second common-mode inductor is connected to the first terminal of the first capacitor and the vehicle power output port. The fourth terminal of the second common-mode inductor is connected to the second terminal of the first capacitor and the vehicle power output port.

5. The power battery pack modularized battery swap control circuit according to claim 4, wherein, The driving circuit includes a first driving chip and a second driving chip. The first driving chip is connected to the first control port of the microcontroller in the control circuit, the power supply circuit, and the first end of the first resistor, respectively. The second driving chip is connected to the second control port of the microcontroller in the control circuit, the power supply circuit, and the first end of the third resistor, respectively.

6. The power battery pack modularized battery swap control circuit according to claim 5, wherein, The sampling circuit includes a current sampling circuit, a battery voltage sampling circuit, and an output voltage sampling circuit. The input terminal of the current sampling circuit is connected to the first terminal and the second terminal of the shunt, respectively. The output terminal of the current sampling circuit is connected to the first sampling port of the microcontroller in the control circuit, and the power supply terminal of the current sampling circuit is connected to the power supply circuit. The input terminal of the battery voltage sampling circuit is connected to the positive terminal and the negative terminal of the battery module, respectively. The output terminal of the battery voltage sampling circuit is connected to the second sampling port of the microcontroller in the control circuit, and the power supply terminal of the battery voltage sampling circuit is connected to the power supply circuit. The input terminal of the output voltage sampling circuit is connected to the first terminal and the second terminal of the second capacitor, respectively. The output terminal of the output voltage sampling circuit is connected to the third sampling port of the microcontroller in the control circuit, and the power supply terminal of the output voltage sampling circuit is connected to the power supply circuit.

7. A battery swap control method based on power battery pack modularization, characterized in that, The battery swapping control method based on modular power battery packs is applied to the battery swapping control circuit based on modular power battery packs according to any one of claims 1-6, wherein the battery swapping control method based on modular power battery packs includes: The system acquires the collected charging and discharging information and generates circuit control commands based on the charging and discharging information and preset charging and discharging index information. The charging and discharging information of the battery module includes the total voltage value of the battery terminal between the two ends of the second capacitor in the modular power battery pack swapping control circuit, the total voltage value of the module terminal of the power battery pack, and the high-voltage loop current value on the shunt in the modular power battery pack swapping control circuit. Battery swapping control is performed based on the circuit control commands. Following the step of generating circuit control commands based on the charging and discharging information, the following steps are included: If the control mode is discharge control mode, then the high-voltage circuit current value in the charge / discharge information is determined, and the discharge overcurrent value in the preset charge / discharge index information is determined; if the high-voltage circuit current value is greater than or equal to the discharge overcurrent value, then a switch disconnect command is generated, and the switch disconnect command is used as a circuit control command; wherein, the switch disconnect command refers to the command to disconnect the second switch; if the high-voltage circuit current value is less than the discharge overcurrent value, then a switch close command is generated, and the switch close command is used as a circuit control command; wherein, the switch close command refers to the command to close the second switch; the total battery terminal voltage value in the charge / discharge information is determined, and the stop discharge voltage value in the charge / discharge index information is determined; if the total battery terminal voltage value is less than the stop discharge voltage value, then a stop discharge command is generated, and the stop discharge command is used as a circuit control command. 8.The power battery pack modular-based battery swapping control method of claim 7, wherein, The step of generating circuit control commands based on the charging and discharging information and preset charging and discharging index information includes: The control mode is determined based on the charging and discharging information; If the control mode is a charging control mode, then the charging current in the charging and discharging information is determined, and the rated charging current in the preset charging and discharging index information is determined. If the rated charging current is greater than the charging current, a first duty cycle instruction is generated and used as a circuit control instruction; wherein, the first duty cycle instruction refers to the instruction to increase the duty cycle of the first switching transistor control signal; If the rated charging current is less than the charging current, a second duty cycle instruction is generated and used as a circuit control instruction; wherein, the second duty cycle instruction refers to the instruction to reduce the duty cycle of the first switching transistor control signal; Determine the battery voltage in the charge / discharge information, and determine the stop charging voltage value in the charge / discharge index information; If the battery voltage is greater than the stop charging voltage value, a stop charging command is generated and used as a circuit control command.

9. A storage medium, characterized by The storage medium stores a program for implementing a battery swapping control method based on a modular power battery pack. The program for implementing the battery swapping control method based on a modular power battery pack is executed by a processor to implement the steps of the battery swapping control method based on a modular power battery pack as described in any one of claims 7-8.

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