Electric quantity balance control circuit for battery pack of electric wheel dump truck

Abstract

The invention discloses an electric quantity balance control circuit for a battery pack of an electric-wheel dump truck, which relates to the technical field of battery packs and comprises a micro-control module for respectively supplying power to electric wheels and auxiliary equipment of the electric-wheel dump truck according to the electric energy states of a first battery module, a second battery module and a third battery module during discharging, when the discharging work is stopped, the first battery module can be charged according to the electric energy states of the first battery module, the second battery module and the third battery module, and the second battery module can be charged according to the electric energy states of the first battery module, the second battery module and the third battery module; electric energy charging and discharging control among the first battery module, the second battery module and the third battery module is realized by matching with the equalization interaction module, and equalization adjustment processing is carried out on the first battery module, the second battery module and the third battery module. According to the electric wheel dump truck battery pack electric quantity balance control circuit, the electric energy utilization rate of the three battery modules and the cruising ability of the three battery modules can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of battery packs, in particular to an electric wheel dump truck battery pack power balance control circuit. Background Art

[0002] The ‌Electric Wheel Dump Truck‌ is a heavy-duty dump truck that uses electricity to drive. It is mainly used in places such as mines and construction sites that require a large amount of material to be transported and dumped. The ‌Electric Wheel Dump Truck‌ in the prior art has two motors driving the rear wheels, each motor corresponds to an electric wheel, and each electric wheel is independently powered by a group of battery packs. In addition, an auxiliary battery pack is used to power auxiliary equipment such as the steering pump, lifting pump, and cooling system on the vehicle. However, each battery pack is individually charged and discharged. When the battery pack supplies power to the electric wheel, due to different discharge efficiencies, an imbalance in power is likely to occur, which in turn leads to different endurance of the battery pack of the electric wheel. In addition, due to the different workloads of the battery packs and the inability to exchange power between the auxiliary battery pack and the battery pack of the electric wheel, the power supply efficiency of the battery pack is low, so it needs to be improved. Summary of the invention

[0003] An embodiment of the present invention provides a battery pack power balance control circuit for an electric wheel dump truck to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, a battery pack power balance control circuit for an electric wheel dump truck is provided, comprising: A first battery module is connected to the micro-control module and the balancing interaction module, and is used to store the second electric energy output by the balancing interaction module, store the first electric energy output by the balancing interaction module when receiving the first energy storage signal output by the micro-control module, release the stored electric energy and provide the third electric energy, and adjust the third electric energy and output the first balancing electric energy when receiving the first discharge signal output by the micro-control module; a second battery module, connected to the micro-control module, the connection control module and the balancing interaction module, and used to store the sixth electric energy output by the connection control module, store the first electric energy output by the balancing interaction module when receiving the second energy storage signal output by the micro-control module, release the stored electric energy and provide the fourth electric energy, and adjust the fourth electric energy and output the second balancing electric energy when receiving the second discharge signal output by the micro-control module; The microcontrol module is connected to the third battery module and is used to perform voltage sampling on the first battery module, the second battery module and the third battery module and output the first voltage signal, the second voltage signal and the third voltage signal respectively. During the operation of the dump truck, the first working signal, the second working signal and the third working signal are output. When the first voltage signal is lower than the second voltage signal, the first compensation signal is output. When the first voltage signal is lower than the second voltage signal, the second compensation signal is output. During the period when the dump truck stops working, when the first voltage signal is equal to the second voltage signal and both are lower than the third voltage signal, the total balance signal and the third discharge signal are output. When the first voltage signal is greater than the second voltage signal and greater than the third voltage signal , output the first discharge signal and the third energy storage signal, when the second voltage signal is greater than the first voltage signal and greater than the third voltage signal, output the second discharge signal and the third energy storage signal, when the third voltage signal is greater than the first voltage signal and greater than the second voltage signal, output the third discharge signal and the second energy storage signal, when the third voltage signal is greater than the second voltage signal and greater than the first voltage signal, output the third discharge signal and the first energy storage signal, when the third voltage signal is greater than the second voltage signal and greater than the first voltage signal, output the third discharge signal and the first energy storage signal, when the third voltage signal is lower than the set voltage threshold, stop the discharge work and output the total balancing signal, according to the voltage between the first voltage signal and the second voltage signal, output the first discharge signal or the second discharge signal and control the voltage balancing of the first battery module and the second battery module; a balancing interaction module connected to the microcontroller module and the third battery module, configured to isolate and transform the first balancing electric energy or the second balancing electric energy, output the third balancing electric energy, and store the third balancing electric energy, isolate and transform the fifth electric energy output by the third battery module, and output the first electric energy, and when receiving the total balancing signal, control the transmission of the third balancing electric energy or the fifth electric energy output by the third battery module and provide the second electric energy; a third battery module, configured to rectify and store the third equalized electric energy upon receiving a third charging signal, and release the stored electric energy and provide the fifth electric energy upon receiving a third discharging signal; The connection control module is connected to the microcontrol module and the first battery module, and is used to control the first battery module and the second battery module to be connected in series and output the sixth electric energy when the first working signal or the second working signal is not received.

[0005] As a further solution of the present invention: the battery pack power balance control circuit of the electric wheel dump truck also includes a first power supply module, a second power supply module and a third power supply module; Preferably, the first power supply module is connected to the microcontroller module, the first battery module and the third battery module, and is used to transmit the third electric energy to the electric wheel of the connected electric wheel dump truck when receiving the first working signal, and to superimpose the fifth electric energy with the third electric energy and supply power to the electric wheel when receiving the first compensation signal; a second power supply module connected to the microcontroller module, the second battery module and the third battery module, and configured to transmit the fourth electric energy to the electric wheel of the connected electric wheel dump truck upon receiving the second working signal, and to superimpose the fifth electric energy with the fourth electric energy and supply power to the electric wheel upon receiving the second compensation signal; The third power supply module is connected to the third battery module and the micro-control module, and is used to transmit the fifth electric energy to the auxiliary equipment of the connected electric wheel dump truck when receiving the third working signal.

[0006] As a further solution of the present invention: the first battery module includes a first inductor, a first resistor, a third power tube, a second power tube and a first battery pack; the microcontroller module includes a first controller; the balancing interaction module includes a first transformer and a second thyristor; Preferably, the first end of the first battery group is connected to the cathode of the second thyristor and is connected to the first end of the first primary side of the first transformer through the first inductor and the first resistor in sequence, the second end of the first primary side of the first transformer is connected to the source of the third power tube, the drain of the third power tube is connected to the drain of the second power tube, the source of the second power tube is connected to the second end of the first battery group, the gate of the third power tube, the gate of the second power tube and the control end of the second thyristor are respectively connected to the IO3 end, IO2 end and IO12 end of the first controller, and the anode of the second thyristor is connected to the first end of the secondary side of the first transformer.

[0007] As a further solution of the present invention: the second power supply module includes a fourth inductor, a sixth power tube, a seventh power tube, a third resistor and a second battery pack; the connection control module includes a first thyristor, a first inverter, a fourth diode and a fifth diode; Preferably, the first end of the second battery group is connected to one end of the first thyristor and is connected to the first end of the second primary of the first transformer through a third resistor and a fourth inductor in sequence, the source of the sixth power tube is connected to the second end of the second primary of the first transformer, the drain of the sixth power tube is connected to the drain of the seventh power tube, the source of the seventh power tube is connected to the second end of the second battery group, the output end of the first inverter is connected to the control end of the first thyristor, the other end of the first thyristor is connected to the second end of the first battery group, the input end of the first inverter is connected to the cathode of the fourth diode and the cathode of the fifth diode, the anode of the fourth diode, the gate of the sixth power tube and the gate of the seventh power tube are respectively connected to the IO1 end, IO6 end and IO7 end of the first controller, and the anode of the fifth diode is connected to the second power supply module.

[0008] As a further solution of the present invention: the third battery module includes a second resistor, a third inductor, a fourth power tube, a fifth power tube and a third battery pack; the microcontroller module also includes a first detection device and a second detection device; the balancing interaction module also includes a second inductor; Preferably, the source of the fourth power tube is connected to the first end of the secondary side of the first transformer and is connected to the second end of the secondary side of the first transformer and one end of the second resistor through the second inductor, the other end of the second resistor is connected to the second end of the third battery group through the third inductor, the drain of the fourth power tube is connected to the drain of the fifth power tube, the source of the fifth power tube is connected to the first end of the third battery group and the input end of the second detection device, the output end of the second detection device, the gate of the fourth power tube and the gate of the fifth power tube are respectively connected to the IO14 end, IO4 end and IO5 end of the first controller, the first input end and the second input end of the first detection device are respectively connected to the first end of the first battery group and the first end of the second battery group, and the output end of the first detection device is connected to the IO13 end of the first controller.

[0009] As a further solution of the present invention: the first power supply module includes a first power tube, a first capacitor, a first diode, a second diode, a third diode, a second capacitor, an eighth power tube and a first motor interface; Preferably, the drain of the first power tube is connected to the first end of the first battery group, the source of the first power tube is connected to the anode of the second diode and one end of the second capacitor and the anode of the first diode and the source of the eighth power tube are connected through the first capacitor, the cathode of the first diode is connected to the cathode of the second diode and the first end of the first motor interface, the other end of the second capacitor is connected to the cathode of the third diode and the second end of the first motor interface, the anode of the third diode is connected to the second end of the first battery group, the drain of the eighth power tube is connected to the first end of the third battery group, and the gate of the eighth power tube and the gate of the first power tube are respectively connected to the IO8 end and IO1 end of the first controller.

[0010] As a further solution of the present invention: the second power supply module includes a ninth power tube, an output adjustment device, a second motor interface and a tenth power tube; Preferably, the drain of the ninth power tube is connected to the first end of the third battery group, the source of the ninth power tube is connected to the second input end of the output regulating device, the first input end of the output regulating device is connected to the source of the tenth power tube, the drain of the tenth power tube is connected to the first end of the second battery group, the output end of the output regulating device is connected to the first end of the second motor interface, the second end of the second motor interface is connected to the ground end of the output regulating device, the second end of the second battery group and the second end of the third battery group, and the gate of the ninth power tube and the gate of the tenth power tube are respectively connected to the IO9 end and IO10 end of the first controller.

[0011] As a further solution of the present invention: the third power supply module includes an eleventh power tube, a third capacitor and an auxiliary machine power supply interface; Preferably, the drain of the eleventh power tube is connected to the first end of the third battery group, the source of the eleventh power tube is connected to the first end of the auxiliary power interface and connected to the second end of the third battery group and the second end of the auxiliary power interface through the third capacitor, and the gate of the eleventh power tube is connected to the IO11 end of the first controller.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the battery pack power balance control circuit of the electric wheel dump truck of the present invention uses the microcontroller module to supply power to the electric wheels and auxiliary equipment of the electric wheel dump truck through the first power supply module, the second power supply module and the third power supply module respectively according to the power states of the first battery module, the second battery module and the third battery module during discharge operation, and can maintain the balanced power supply of the first battery module and the second battery module through the third battery module. When the discharge operation is stopped, the power charge and discharge control between the first battery module, the second battery module and the third battery module can be realized according to the power states of the first battery module, the second battery module and the third battery module in cooperation with the balancing interaction module, and the first battery module, the second battery module and the third battery module are balanced and adjusted to improve the power utilization rate of the three battery modules and the endurance of the three battery modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0014] Figure 1 A schematic block diagram of a battery pack power balance control circuit for an electric wheel dump truck provided in an embodiment of the present invention.

[0015] Figure 2 A circuit diagram of a battery pack power balance control circuit for an electric wheel dump truck provided in an embodiment of the present invention.

[0016] Figure 3 A circuit diagram of a second power supply module provided in an embodiment of the present invention.

[0017] Figure 4 A circuit diagram of a third power supply module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In one embodiment, see Figure 1 , a battery pack power balance control circuit for an electric wheel dump truck, comprising: Specifically, the first battery module 1 is connected to the micro-control module 3 and the balancing interaction module 4, and is used to store the second electric energy output by the balancing interaction module 4, and when receiving the first energy storage signal output by the micro-control module 3, stores the first electric energy output by the balancing interaction module 4, releases the stored electric energy and provides the third electric energy, and when receiving the first discharge signal output by the micro-control module 3, adjusts the third electric energy and outputs the first balancing electric energy; The second battery module 2 is connected to the micro-control module 3, the connection control module 6 and the balancing interaction module 4, and is used to store the sixth electric energy output by the connection control module 6, and when receiving the second energy storage signal output by the micro-control module 3, store the first electric energy output by the balancing interaction module 4, release the stored electric energy and provide the fourth electric energy, and when receiving the second discharge signal output by the micro-control module 3, adjust the fourth electric energy and output the second balancing electric energy; The microcontroller module 3 is connected to the third battery module 5, and is used to perform voltage sampling on the first battery module 1, the second battery module 2 and the third battery module 5 and output the first voltage signal, the second voltage signal and the third voltage signal respectively. During the operation of the dump truck, the first working signal, the second working signal and the third working signal are output. When the first voltage signal is lower than the second voltage signal, the first compensation signal is output. When the first voltage signal is lower than the second voltage signal, the second compensation signal is output. During the period when the dump truck stops working, when the first voltage signal is equal to the second voltage signal and both are lower than the third voltage signal, the total balance signal and the third discharge signal are output. The first voltage signal is greater than the second voltage signal and greater than the third voltage signal. When the first voltage signal is greater than the second voltage signal, the first discharge signal and the third energy storage signal are output; when the second voltage signal is greater than the first voltage signal and the third voltage signal, the second discharge signal and the third energy storage signal are output; when the third voltage signal is greater than the first voltage signal and the second voltage signal, the third discharge signal and the second energy storage signal are output; when the third voltage signal is greater than the second voltage signal and the first voltage signal, the third discharge signal and the first energy storage signal are output; when the third voltage signal is lower than the set voltage threshold, the discharge operation is stopped and the total balancing signal is output; according to the voltage between the first voltage signal and the second voltage signal, the first discharge signal or the second discharge signal is output and the voltage balancing of the first battery module 1 and the second battery module 2 is controlled; The balancing interaction module 4 is connected to the micro-control module 3 and the third battery module 5, and is used to isolate and transform the first balancing electric energy or the second balancing electric energy, output the third balancing electric energy, and store the third balancing electric energy, isolate and transform the fifth electric energy output by the third battery module 5, and output the first electric energy, and when receiving the total balancing signal, control the transmission of the third balancing electric energy or the fifth electric energy output by the third battery module 5 and provide the second electric energy; The third battery module 5 is used to rectify and store the third equalized electric energy when receiving the third charging signal, and release the stored electric energy and provide the fifth electric energy when receiving the third discharging signal; The connection control module 6 is connected to the microcontroller module 3 and the first battery module 1, and is used to control the first battery module 1 and the second battery module 2 to be connected in series and output the sixth electric energy when the first working signal or the second working signal is not received.

[0020] Furthermore, the battery pack power balance control circuit of the electric wheel dump truck also includes a first power supply module 7, a second power supply module 8 and a third power supply module 9; Specifically, the first power supply module 7 is connected to the microcontroller module 3, the first battery module 1 and the third battery module 5, and is used to transmit the third electric energy to the electric wheel of the connected electric wheel dump truck when receiving the first working signal, and to superimpose the fifth electric energy with the third electric energy and supply power to the electric wheel when receiving the first compensation signal; a second power supply module 8 connected to the microcontroller module 3, the second battery module 2 and the third battery module 5, and configured to transmit the fourth electric energy to the electric wheel of the connected electric wheel dump truck when receiving the second working signal, and to superimpose the fifth electric energy with the fourth electric energy and supply power to the electric wheel when receiving the second compensation signal; The third power supply module 9 is connected to the third battery module 5 and the micro-control module 3, and is used for transmitting the fifth electric energy to the auxiliary equipment of the connected electric wheel dump truck when receiving the third working signal.

[0021] In a specific embodiment, the first battery module 1 may adopt a first battery circuit composed of a battery pack, an inductor, a field effect transistor, etc., which may perform energy storage and discharge control; the second battery module 2 may adopt a first battery circuit composed of a battery pack, an inductor, a field effect transistor, etc., which may perform energy storage and discharge control; the microcontroller 3 may adopt a microcontroller circuit composed of a detection device and a single-chip microcomputer, and the detection device performs voltage sampling, voltage difference detection and voltage size comparison. The single-chip microcomputer integrates many components such as an operator, a controller, a memory, and an input and output device to realize signal processing, data storage, module control, timing control and other functions; the balancing interaction module 4 may adopt a balancing interaction circuit composed of a transformer, an inductor and a diode, which may realize isolation transformation, energy storage and power transmission control, and realize power balancing control of the first battery module 1, the second battery module 2 and the third battery module 5 ; The third battery module 5 can adopt a third battery circuit composed of a battery pack, a field effect transistor, an inductor, etc., which can perform energy storage and discharge control; the connection control module 6 can adopt a connection control circuit composed of a thyristor, an inverter and a diode, which can control the first battery module 1 and the second battery module 2 to be connected in series; the first power supply module 7 can adopt a first power supply circuit composed of a field effect transistor, a capacitor, a diode, etc., which can control the discharge of the first battery module 1, and superimpose and compensate the electric energy released by the first battery module 1 with the electric energy released by the third battery module 5; the second power supply module 8 can adopt a second power supply circuit composed of an output regulating device, a field effect transistor and a motor interface, which can perform power transmission control and power superposition compensation control; the third power supply module 9 can adopt a third power supply circuit composed of a field effect transistor, a capacitor and an auxiliary power supply interface, which can perform power transmission control.

[0022] In another embodiment, see Figure 1 , Figure 2 , Figure 3 and Figure 4 The first battery module 1 includes a first inductor L1, a first resistor R1, a third power tube Q3, a second power tube Q2 and a first battery pack; the microcontroller module 3 includes a first controller U1; the balancing interaction module 4 includes a first transformer B1 and a second thyristor S2; Specifically, the first end of the first battery group is connected to the cathode of the second thyristor S2 and is connected to the first end of the first primary side of the first transformer B1 through the first inductor L1 and the first resistor R1 in sequence, the second end of the first primary side of the first transformer B1 is connected to the source of the third power tube Q3, the drain of the third power tube Q3 is connected to the drain of the second power tube Q2, the source of the second power tube Q2 is connected to the second end of the first battery group, the gate of the third power tube Q3, the gate of the second power tube Q2 and the control end of the second thyristor S2 are respectively connected to the IO3 end, IO2 end and IO12 end of the first controller U1, and the anode of the second thyristor S2 is connected to the first end of the secondary side of the first transformer B1.

[0023] In a specific embodiment, the third power tube Q3 and the second power tube Q2 can both be N-channel field effect tubes with body diodes, which can control the energy storage and discharge of the first battery pack and can perform unidirectional transmission control of electric energy; the first battery pack can be a storage battery; the second thyristor S2 can be a unidirectional thyristor; the first controller U1 can be an STM32 microcontroller.

[0024] Further, the second power supply module 8 includes a fourth inductor L4, a sixth power tube Q6, a seventh power tube Q7, a third resistor R3 and a second battery pack; the connection control module 6 includes a first thyristor S1, a first inverter INV1, a fourth diode D4 and a fifth diode D5; Specifically, the first end of the second battery group is connected to one end of the first thyristor S1 and is connected to the first end of the second primary side of the first transformer B1 through the third resistor R3 and the fourth inductor L4 in sequence, the source of the sixth power tube Q6 is connected to the second end of the second primary side of the first transformer B1, the drain of the sixth power tube Q6 is connected to the drain of the seventh power tube Q7, the source of the seventh power tube Q7 is connected to the second end of the second battery group, the output end of the first inverter INV1 is connected to the control end of the first thyristor S1, the other end of the first thyristor S1 is connected to the second end of the first battery group, the input end of the first inverter INV1 is connected to the cathode of the fourth diode D4 and the cathode of the fifth diode D5, the anode of the fourth diode D4, the gate of the sixth power tube Q6 and the gate of the seventh power tube Q7 are respectively connected to the IO1 end, IO6 end and IO7 end of the first controller U1, and the anode of the fifth diode D5 is connected to the second power supply module 8.

[0025] In a specific embodiment, the sixth power tube Q6 and the seventh power tube Q7 can both use N-channel field effect tubes with body diodes to control the discharge and energy storage of the second battery group and perform unidirectional transmission control of electric energy; the selection of the second battery group is the same as that of the first battery group; the first thyristor S1 can use a bidirectional thyristor; the first inverter INV1 can use a NOT gate chip.

[0026] Further, the third battery module 5 includes a second resistor R2, a third inductor L3, a fourth power tube Q4, a fifth power tube Q5 and a third battery pack; the microcontroller module 3 also includes a first detection device and a second detection device; the balancing interaction module 4 also includes a second inductor L2; Specifically, the source of the fourth power tube Q4 is connected to the first end of the secondary side of the first transformer B1 and is connected to the second end of the secondary side of the first transformer B1 through the second inductor L2, and the other end of the second resistor R2 is connected to the second end of the third battery group through the third inductor L3, the drain of the fourth power tube Q4 is connected to the drain of the fifth power tube Q5, the source of the fifth power tube Q5 is connected to the first end of the third battery group and the input end of the second detection device, the output end of the second detection device, the gate of the fourth power tube Q4 and the gate of the fifth power tube Q5 are respectively connected to the IO14 end, IO4 end and IO5 end of the first controller U1, the first input end and the second input end of the first detection device are respectively connected to the first end of the first battery group and the first end of the second battery group, and the output end of the first detection device is connected to the IO13 end of the first controller U1.

[0027] In a specific embodiment, the fourth power tube Q4 and the fifth power tube Q5 can both use N-channel field effect tubes with body diodes to control the discharge and energy storage of the third battery module 5; the third battery group can use a storage battery; the first detection device can be composed of a resistor, a comparator and a subtraction device, which can sample the voltage of the first battery group and the second battery group, compare the voltages of the first battery group and the second battery group, and calculate the voltage difference between the first battery group and the second battery group; the second detection device can be composed of a reference power supply, a resistor and a comparator, which can sample the voltage and set the voltage threshold, and compare the voltage of the sampled signal with the signal sampled by the first detection device, and compare the voltage with the set voltage threshold, which is set by relevant staff.

[0028] Further, the first power supply module 7 includes a first power tube Q1, a first capacitor C1, a first diode D1, a second diode D2, a third diode D3, a second capacitor C2, an eighth power tube Q8 and a first motor interface; Specifically, the drain of the first power tube Q1 is connected to the first end of the first battery group, the source of the first power tube Q1 is connected to the anode of the second diode D2 and one end of the second capacitor C2 and connected to the anode of the first diode D1 and the source of the eighth power tube Q8 through the first capacitor C1, the cathode of the first diode D1 is connected to the cathode of the second diode D2 and the first end of the first motor interface, the other end of the second capacitor C2 is connected to the cathode of the third diode D3 and the second end of the first motor interface, the anode of the third diode D3 is connected to the second end of the first battery group, the drain of the eighth power tube Q8 is connected to the first end of the third battery group, and the gate of the eighth power tube Q8 and the gate of the first power tube Q1 are respectively connected to the IO8 end and IO1 end of the first controller U1.

[0029] In a specific embodiment, the above-mentioned first power tube Q1 can be an N-channel field effect tube; the above-mentioned first motor interface is connected to the electric wheel of the electric wheel dump truck to power the electric wheel of the electric wheel dump truck; the above-mentioned eighth power tube Q8 can be an N-channel field effect tube with a body diode.

[0030] Further, the second power supply module 8 includes a ninth power tube Q9, an output adjustment device, a second motor interface and a tenth power tube Q10; Specifically, the drain of the ninth power tube Q9 is connected to the first end of the third battery group, the source of the ninth power tube Q9 is connected to the second input end of the output regulating device, the first input end of the output regulating device is connected to the source of the tenth power tube Q10, the drain of the tenth power tube Q10 is connected to the first end of the second battery group, the output end of the output regulating device is connected to the first end of the second motor interface, the second end of the second motor interface is connected to the ground end of the output regulating device, the second end of the second battery group and the second end of the third battery group, and the gate of the ninth power tube Q9 and the gate of the tenth power tube Q10 are respectively connected to the IO9 end and IO10 end of the first controller U1.

[0031] In a specific embodiment, the ninth power tube Q9 may be an N-channel field effect tube, and the tenth power tube Q10 may be an N-channel field effect tube with a body diode; the circuit composition structure of the output regulating device is the same as the circuit composition structure of the first capacitor C1, the first diode D1, the second diode D2 and the second capacitor C2, and performs power transmission and power superposition compensation.

[0032] Further, the third power supply module 9 includes an eleventh power tube Q11, a third capacitor C3 and an auxiliary machine power supply interface; Specifically, the drain of the eleventh power tube Q11 is connected to the first end of the third battery pack, the source of the eleventh power tube Q11 is connected to the first end of the auxiliary power interface and connected to the second end of the third battery pack and the second end of the auxiliary power interface through the third capacitor C3, and the gate of the eleventh power tube Q11 is connected to the IO11 end of the first controller U1.

[0033] In a specific embodiment, the eleventh power tube Q11 may be an N-channel field effect tube; the auxiliary machine power supply interface is connected to the auxiliary machine equipment of the electric wheel dump truck.

[0034] In a battery pack power balance control circuit of an electric wheel dump truck of the present embodiment, during the operation of the dump truck, the IO1 terminal, IO10 terminal and IO11 terminal of the first controller U1 respectively output the first working signal, the second working signal and the third working signal, and respectively control the first power tube Q1, the tenth power tube Q10 and the eleventh power tube Q11 to be turned on, so that the third electric energy released by the first battery pack is transmitted to the electric wheel of the electric wheel dump truck connected to the first motor interface through the second diode D2, and similarly, the fourth electric energy released by the second battery pack is transmitted to the electric wheel of the electric wheel dump truck connected to the second motor interface, and the fifth electric energy released by the third battery pack is transmitted to the auxiliary equipment of the electric wheel dump truck connected to the auxiliary power interface, and at the same time, the first detection device The voltages of the first battery pack and the second battery pack are detected and the first voltage signal and the second voltage signal are output respectively. The second detection device detects the voltage of the third battery pack and outputs the third voltage signal. When the first voltage signal is lower than the second voltage signal, IO8 of the first controller U1 outputs a first compensation signal, controls the eighth power tube Q8 to be turned on, stores the electric energy of the third battery pack through the first capacitor C1 and performs superposition processing with the electric energy stored in the second capacitor C2, and transmits it to the first battery interface through the first diode D1. Similarly, when the first voltage signal is lower than the second voltage signal, the IO9 end of the first controller U1 outputs a second compensation signal and controls the ninth power tube Q9 to be turned on, and the second battery pack and the third battery pack are superimposed and compensated through the output adjustment device. Power supply, and then maintain equal voltage power supply to the two groups of electric wheels of the electric wheel dump truck. When the dump truck stops working, the first inverter INV1 controls the first thyristor S1 to turn on, and the first battery group and the second battery group are connected in series. If the first voltage signal is equal to the second voltage signal and both are lower than the third voltage signal, the IO12 end of the first controller U1 outputs a total balancing signal and controls the second thyristor S2 to turn on, and the IO4 end outputs a third discharge signal and controls the fourth power tube Q4 to turn on. The third battery group cooperates with the second inductor L2 to supply power to the first battery group and the second battery group in series. If the first voltage signal is greater than the second voltage signal and greater than the third voltage signal, the IO2 end of the first controller U1 outputs a first discharge signal and controls the second power tube Q4 to turn on. The tube Q2 is turned on, the IO5 terminal outputs the third energy storage signal and controls the fifth power tube Q5 to be turned on, so that the first battery group supplies power to the third battery group through the first transformer B1. Similarly, when the second voltage signal is greater than the first voltage signal and greater than the third voltage signal, the IO7 terminal outputs the second discharge signal and controls the seventh power tube Q7 to be turned on, and the IO5 terminal controls the fifth power tube Q5 to be turned on, and the second battery group supplies power to the third battery group. If the third voltage signal is greater than the first voltage signal and greater than the second voltage signal, the IO4 terminal controls the fourth power tube Q4 to be turned on, and the IO6 terminal outputs the second energy storage signal and controls the sixth power tube Q6 to be turned on, so that the third battery group supplies power to the second battery group. If the third voltage signal is greater than the second voltage signal and greater than the first voltage signal,The first controller U1 outputs the third discharge signal and the first energy storage signal and controls the fourth power tube Q4 and the third power tube Q3 to be turned on respectively. The third battery group supplies power to the first battery group. If the third voltage signal is lower than the voltage threshold set by the second detection device, the discharge work of the third battery group will be stopped and the total balance signal will be output. At this time, the first discharge signal or the second discharge signal will be output according to the voltage between the first voltage signal and the second voltage signal, and the voltage balance of the first battery module 1 and the second battery module 2 will be controlled. That is, when the first voltage signal is greater than the second voltage signal, the first battery group will be controlled to discharge, and the first transformer B1 will isolate and transform the voltage and the second inductor L2 will store the energy. The energy stored in the second inductor L2 will directly supply power to the first battery group and the second battery group in series through the second thyristor S2. Similarly, when the first voltage signal is less than the second voltage signal, the second battery group will discharge, and the energy stored in the second inductor L2 will directly supply power to the first battery group and the second battery group in series through the second thyristor S2. ,

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A battery pack power balance control circuit for an electric wheel dump truck, characterized in that: The circuit includes: a first battery module, connected to the microcontrol module and the balancing interaction module, and used to store the second electric energy output by the balancing interaction module, store the first electric energy output by the balancing interaction module when receiving the first energy storage signal output by the microcontrol module, release the stored electric energy and provide the third electric energy, and adjust the third electric energy and output the first balancing electric energy when receiving the first discharge signal output by the microcontrol module; a second battery module, connected to the micro-control module, the connection control module and the balancing interaction module, and used to store the sixth electric energy output by the connection control module, store the first electric energy output by the balancing interaction module when receiving the second energy storage signal output by the micro-control module, release the stored electric energy and provide the fourth electric energy, and adjust the fourth electric energy and output the second balancing electric energy when receiving the second discharge signal output by the micro-control module; The microcontrol module is connected to the third battery module and is used to perform voltage sampling on the first battery module, the second battery module and the third battery module and output the first voltage signal, the second voltage signal and the third voltage signal respectively. During the operation of the dump truck, the first working signal, the second working signal and the third working signal are output. When the first voltage signal is lower than the second voltage signal, the first compensation signal is output. When the first voltage signal is lower than the second voltage signal, the second compensation signal is output. During the period when the dump truck stops working, when the first voltage signal is equal to the second voltage signal and both are lower than the third voltage signal, the total balance signal and the third discharge signal are output. When the first voltage signal is greater than the second voltage signal and greater than the third voltage signal , output the first discharge signal and the third energy storage signal, when the second voltage signal is greater than the first voltage signal and greater than the third voltage signal, output the second discharge signal and the third energy storage signal, when the third voltage signal is greater than the first voltage signal and greater than the second voltage signal, output the third discharge signal and the second energy storage signal, when the third voltage signal is greater than the second voltage signal and greater than the first voltage signal, output the third discharge signal and the first energy storage signal, when the third voltage signal is greater than the second voltage signal and greater than the first voltage signal, output the third discharge signal and the first energy storage signal, when the third voltage signal is lower than the set voltage threshold, stop the discharge work and output the total balancing signal, according to the voltage between the first voltage signal and the second voltage signal, output the first discharge signal or the second discharge signal and control the voltage balancing of the first battery module and the second battery module; a balancing interaction module connected to the microcontroller module and the third battery module, configured to isolate and transform the first balancing electric energy or the second balancing electric energy, output the third balancing electric energy, and store the third balancing electric energy, isolate and transform the fifth electric energy output by the third battery module, and output the first electric energy, and when receiving the total balancing signal, control the transmission of the third balancing electric energy or the fifth electric energy output by the third battery module and provide the second electric energy; a third battery module, configured to rectify and store the third equalized electric energy upon receiving a third charging signal, and release the stored electric energy and provide the fifth electric energy upon receiving a third discharging signal; The connection control module is connected to the micro control module and the first battery module, and is used to control the first battery module and the second battery module to be connected in series and output the sixth electric energy when the first working signal or the second working signal is not received.

2. The battery pack power balance control circuit of an electric wheel dump truck according to claim 1, characterized in that: The battery pack power balance control circuit of the electric wheel dump truck also includes a first power supply module, a second power supply module and a third power supply module; a first power supply module connected to the microcontroller module, the first battery module and the third battery module, and configured to transmit the third electric energy to the electric wheel of the connected electric wheel dump truck upon receiving the first working signal, and to superimpose the fifth electric energy with the third electric energy and supply power to the electric wheel upon receiving the first compensation signal; a second power supply module connected to the microcontroller module, the second battery module and the third battery module, and configured to transmit the fourth electric energy to the electric wheel of the connected electric wheel dump truck when receiving the second working signal, and to superimpose the fifth electric energy with the fourth electric energy and supply power to the electric wheel when receiving the second compensation signal; The third power supply module is connected to the third battery module and the micro-control module, and is used to transmit the fifth electric energy to the auxiliary equipment of the connected electric wheel dump truck when receiving the third working signal.

3. The battery pack power balance control circuit of an electric wheel dump truck according to claim 2 is characterized in that: The first battery module includes a first inductor, a first resistor, a third power tube, a second power tube and a first battery pack; the microcontroller module includes a first controller; the balancing interaction module includes a first transformer and a second thyristor; The first end of the first battery group is connected to the cathode of the second thyristor and is connected to the first end of the first primary side of the first transformer through the first inductor and the first resistor in sequence. The second end of the first primary side of the first transformer is connected to the source of the third power tube, the drain of the third power tube is connected to the drain of the second power tube, the source of the second power tube is connected to the second end of the first battery group, the gate of the third power tube, the gate of the second power tube and the control end of the second thyristor are respectively connected to the IO3 end, IO2 end and IO12 end of the first controller, and the anode of the second thyristor is connected to the first end of the secondary side of the first transformer.

4. The battery pack power balance control circuit of an electric wheel dump truck according to claim 3 is characterized in that: The second power supply module includes a fourth inductor, a sixth power tube, a seventh power tube, a third resistor and a second battery pack; the connection control module includes a first thyristor, a first inverter, a fourth diode and a fifth diode; The first end of the second battery group is connected to one end of the first thyristor and is connected to the first end of the second primary side of the first transformer through the third resistor and the fourth inductor in sequence. The source of the sixth power tube is connected to the second end of the second primary side of the first transformer, the drain of the sixth power tube is connected to the drain of the seventh power tube, the source of the seventh power tube is connected to the second end of the second battery group, the output end of the first inverter is connected to the control end of the first thyristor, the other end of the first thyristor is connected to the second end of the first battery group, the input end of the first inverter is connected to the cathode of the fourth diode and the cathode of the fifth diode, the anode of the fourth diode, the gate of the sixth power tube and the gate of the seventh power tube are respectively connected to the IO1 end, IO6 end and IO7 end of the first controller, and the anode of the fifth diode is connected to the second power supply module.

5. The battery pack power balance control circuit of an electric wheel dump truck according to claim 4, characterized in that: The third battery module includes a second resistor, a third inductor, a fourth power tube, a fifth power tube and a third battery pack; the microcontroller module also includes a first detection device and a second detection device; the balancing interaction module also includes a second inductor; The source of the fourth power tube is connected to the first end of the secondary side of the first transformer and is connected to the second end of the secondary side of the first transformer and one end of the second resistor through the second inductor. The other end of the second resistor is connected to the second end of the third battery pack through the third inductor. The drain of the fourth power tube is connected to the drain of the fifth power tube. The source of the fifth power tube is connected to the first end of the third battery pack and the input end of the second detection device. The output end of the second detection device, the gate of the fourth power tube and the gate of the fifth power tube are respectively connected to the IO14 end, IO4 end and IO5 end of the first controller. The first input end and the second input end of the first detection device are respectively connected to the first end of the first battery pack and the first end of the second battery pack. The output end of the first detection device is connected to the IO13 end of the first controller.

6. The battery pack power balance control circuit of an electric wheel dump truck according to claim 5, characterized in that: The first power supply module includes a first power tube, a first capacitor, a first diode, a second diode, a third diode, a second capacitor, an eighth power tube and a first motor interface; The drain of the first power tube is connected to the first end of the first battery group, the source of the first power tube is connected to the anode of the second diode and one end of the second capacitor and is connected to the anode of the first diode and the source of the eighth power tube through the first capacitor, the cathode of the first diode is connected to the cathode of the second diode and the first end of the first motor interface, the other end of the second capacitor is connected to the cathode of the third diode and the second end of the first motor interface, the anode of the third diode is connected to the second end of the first battery group, the drain of the eighth power tube is connected to the first end of the third battery group, and the gate of the eighth power tube and the gate of the first power tube are respectively connected to the IO8 end and IO1 end of the first controller.

7. The battery pack power balance control circuit of an electric wheel dump truck according to claim 6, characterized in that: The second power supply module includes a ninth power tube, an output regulating device, a second motor interface and a tenth power tube; The drain of the ninth power tube is connected to the first end of the third battery group, the source of the ninth power tube is connected to the second input end of the output regulating device, the first input end of the output regulating device is connected to the source of the tenth power tube, the drain of the tenth power tube is connected to the first end of the second battery group, the output end of the output regulating device is connected to the first end of the second motor interface, the second end of the second motor interface is connected to the ground end of the output regulating device, the second end of the second battery group and the second end of the third battery group, and the gate of the ninth power tube and the gate of the tenth power tube are respectively connected to the IO9 end and IO10 end of the first controller.

8. The battery pack power balance control circuit of an electric wheel dump truck according to claim 7, characterized in that: The third power supply module includes an eleventh power tube, a third capacitor and an auxiliary machine power supply interface; The drain of the eleventh power tube is connected to the first end of the third battery pack, the source of the eleventh power tube is connected to the first end of the auxiliary power interface and is connected to the second end of the third battery pack and the second end of the auxiliary power interface through the third capacitor, and the gate of the eleventh power tube is connected to the IO11 end of the first controller.

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