Power conversion storage device and storage method for battery module

Abstract

The invention provides a power conversion storage device of a battery module and a storage method. The power conversion storage device comprises a power input interface; the power input interface is connected with the power storage module; the power conversion module comprises a rectifier and a DC-DC converter, the rectifier is used for converting alternating current power into direct current power, and the DC-DC converter is used for converting the direct current power into voltage and current stored by the battery. The power conversion and storage device of the battery module can effectively convert an external alternating current power supply into voltage and current suitable for battery storage. The power storage module is composed of a plurality of battery units which are connected in series or in parallel, voltage, current and temperature parameters are detected in real time through a sensor in the control module, charging management is carried out through a microprocessor, the safety and stability of battery charging are ensured, and the service life of the battery is prolonged. The microprocessor processes a power conversion storage voltage formula, the power conversion and storage process can be accurately controlled, and the power conversion precision and efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power conversion and storage, and in particular to a power conversion and storage device and a storage method for a battery module. Background Art

[0002] With the widespread use of electronic devices and the growing demand for sustainable energy, efficient and reliable power storage and conversion technologies have become crucial.

[0003] The SOC balancing control device and method of a power storage module proposed in the Chinese invention patent application number: CN112886076A, the technical solution of which includes: a power storage module selector, a boost converter, a regeneration switch, a mode selector and a charging standby switch; the power storage module selector is connected to the boost converter; the power storage module selector includes a plurality of battery packs, the regeneration switch is respectively connected to the power storage module selector and the boost converter, and is used to enable the boost converter to reversely charge the battery pack; the charging standby switch is connected to the boost converter, and is used to serve as a backup power supply for the boost converter; the mode selector is respectively connected to the charging standby switch, the boost converter, and the power storage module selector, and is used to switch the power supply mode. The balancing control device can allow the battery to balance the battery SOC while charging the load, and the balancing speed and balancing efficiency are greatly improved.

[0004] In existing technologies, power conversion efficiency is often low, and external power cannot be effectively converted into voltage and current suitable for battery storage, which leads to energy waste. In addition, battery charging management is not accurate enough, which can easily damage the battery and shorten the battery life.

[0005] In addition, existing power storage modules have problems with the balanced management of battery cells, making it difficult for each battery cell to maintain consistent power, affecting the overall performance and reliability of the battery pack. At the same time, there is a lack of accurate control in terms of power output, and it is impossible to accurately output power according to the needs of the external load, resulting in irrational use of power resources.

[0006] In terms of circuit stability, the existing technology is easily affected by electromagnetic interference, which reduces the reliability of the circuit. Moreover, there is a lack of effective adjustment measures for voltage fluctuations and temperature changes in the circuit, which easily leads to damage to circuit components. Therefore, we propose a power conversion storage device and storage method for a battery module. Summary of the invention

[0007] The purpose of the present invention is to address the problems raised by the existing background technology. In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions: a power conversion and storage device of a battery module, comprising a power input interface, a power conversion module, a power storage module, a power output interface and a control module; The power input interface is used to receive input from an external power source, and the power input interface is connected to the power storage module; the power conversion module is connected to the power input interface, and is used to convert the input power into voltage and current stored in the battery; The power conversion module includes a rectifier and a DC-DC converter. The rectifier is used to convert AC power into DC power, and the DC-DC converter is used to convert DC power into voltage and current stored in the battery. The power storage module is connected to the power conversion module and is used to store the converted power; the power storage module includes a plurality of battery cells connected in series or in parallel; The power output interface is connected to the power storage module and is used to output the stored power to an external load; The control module is respectively connected to the power conversion module, the power storage module and the power output interface, and is used to control the operation of the entire device, including power conversion, battery charging and discharging management; the control module includes a microprocessor, a sensor and a driver; the microprocessor is used to process various control signals and data, the sensor is used to detect the voltage, current and temperature parameters of the power storage module, and the driver is used to control the operation of the power conversion module and the power output interface.

[0008] As a preferred technical solution of the present invention, the microprocessor is arranged on a power conversion circuit board, a battery equalizer is arranged on the power conversion circuit board, and the battery equalizer is connected to a voltage regulator diode circuit.

[0009] As a preferred technical solution of the present invention, the driver is connected to an electromagnetic interference filter, and the electromagnetic interference filter is connected to an energy storage inductor.

[0010] As a preferred technical solution of the present invention, the energy storage inductor is connected to a thermistor, the thermistor is connected to a filter capacitor, and a cooling fan is provided on the side of the power conversion circuit board.

[0011] As a preferred technical solution of the present invention, the filter capacitor is connected to a relay, and the relay is connected to a resistor.

[0012] The storage method of the power conversion storage device of the battery module comprises the following steps: Step 1. An external power source inputs power through a power input interface, and the power input interface transmits the power to the power conversion module; a rectifier in the power conversion module converts the AC power into a DC power, and a DC-DC converter converts the DC power into a voltage and current suitable for battery storage; Step 2. The converted electricity is stored in a power storage module, which is composed of a plurality of battery cells connected in series or in parallel; the sensor in the control module detects the voltage, current, and temperature parameters of the power storage module in real time, and transmits these parameters to the microprocessor; Step 3. The microprocessor processes various control voltages and currents and manages battery charging based on the parameters detected by the sensor; The formula for the microprocessor to process power conversion and store voltage is: + ; in Is the time during the power conversion and storage process Voltage; is the initial storage voltage of power conversion storage; is the power storage value of the i-th harmonic component; is the phase of the i-th power conversion storage harmonic component; is the power conversion storage frequency; is the power conversion storage harmonic order Step 4. During the battery charging process, the battery balancer on the power conversion circuit board manages the battery cells to ensure that the power of each battery cell remains consistent; the voltage regulator diode circuit provides voltage regulation protection for the battery balancer; when the stored power needs to be output to the external load, the power is transmitted to the power output interface through the power storage module; The stored power output current is calculated as: * * Where: P is the power of the stored electricity output to the external load, V is the voltage of the stored electricity output to the external load, is the power factor of the stored power output to the external load, is the stored power frequency, is the fluctuation value of the i-th stored power phase component.

[0013] Step 5. The driver in the control module controls the operation of the power conversion module and the power output interface; the electromagnetic interference filter connected to the driver filters the electromagnetic interference in the circuit; the filtered power is transmitted to the energy storage inductor, which stores and releases the power; the energy storage inductor is connected to the thermistor, which adjusts the circuit resistance according to temperature changes; The resistance adjustment formula is: + ; in, It's time Resistance; is the initial value of the resistor; It is The phase adjusted by a resistor; is the number of resistance adjustments; Step 6. The filter capacitor further filters the power to improve the power quality; the filter capacitor is connected to the relay, and the relay controls the on and off of the circuit according to the control signal; the relay is connected to the resistor, and the resistor is used to limit the current and protect the circuit components.

[0014] As a preferred technical solution of the present invention, the AC voltage of the external power supply input is 220V and the frequency is 50Hz. The rectifier converts the 220V AC power supply into a 300V DC power supply; the DC-DC converter converts the 300V DC power supply into a voltage stored in the battery.

[0015] As a preferred technical solution of the present invention, the sensor detects that the initial voltage of the power storage module is 10V, the current is 2A, and the temperature is 25°C.

[0016] As a preferred technical solution of the present invention, the parameter cutoff frequency of the electromagnetic interference filter is 100kHz.

[0017] As a preferred technical solution of the present invention, the capacitance value of the filter capacitor is 1000 μF.

[0018] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of the present invention: The power conversion and storage device of the battery module of the present invention can effectively convert the external AC power supply into a voltage and current suitable for battery storage, thereby improving the utilization efficiency of power. The power storage module is composed of a plurality of battery cells connected in series or in parallel. The voltage, current, and temperature parameters are detected in real time by the sensors in the control module, and the charging management is performed by the microprocessor, which can ensure the safety and stability of battery charging and extend the battery life. The microprocessor processes the formula for power conversion and storage voltage, and can accurately control the power conversion and storage process, thereby improving the accuracy and efficiency of power conversion.

[0019] The battery balancer manages the battery cells to ensure that the power of each battery cell remains consistent, improving the overall performance and reliability of the battery pack. The voltage regulator diode circuit provides voltage protection for the battery balancer, which can effectively prevent voltage fluctuations from damaging the battery balancer and improve the stability of the system. The stored power output current calculation formula can accurately output the required power according to the needs of the external load, improving the accuracy and reliability of the power output. The driver in the control module controls the operation of the power conversion module and the power output interface to ensure the normal conversion and output of power.

[0020] Electromagnetic interference filters filter the electromagnetic interference in the circuit, reducing the impact of electromagnetic interference on the circuit and improving the stability and reliability of the circuit. Energy storage inductors store and release electricity, effectively balancing the supply and demand of electricity and improving the stability of the power system. Thermistors adjust the circuit resistance according to temperature changes, preventing the circuit from being damaged due to excessive temperature and improving the safety of the circuit. Filter capacitors further filter the electricity, improving the quality of the electricity and making the output electricity more stable and pure.

[0021] The relay controls the on and off of the circuit according to the control signal, and the resistor is used to limit the current and protect the circuit components, further improving the safety and reliability of the circuit. The synergistic effect of the electromagnetic interference filter, energy storage inductor, thermistor, and filter capacitor components filters and stabilizes the output power, which can provide stable, high-quality power to the external load and reduce the impact of power fluctuations on the load equipment.

[0022] The microprocessor in the control module can process various control signals and data, realize accurate management of power conversion, battery charging and discharging, and improve the operating reliability and safety of the device. The cooling fan set on the side of the power conversion circuit board can timely dissipate the heat generated during the operation of the device, ensure that the device operates within the normal temperature range, and improve the stability and reliability of the device. Through efficient conversion and rational use of energy, as well as effective management of batteries, the device helps to reduce energy waste and achieve the goal of energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 A schematic diagram of the structure provided by the present invention; Figure 2 A schematic diagram of the control module structure provided by the present invention; Figure 3 A schematic diagram of a local structure provided by the present invention; Figure 4 A schematic cross-sectional view of the structure provided by the present invention; Figure 5 This is a schematic diagram of the structure of the power conversion module provided by the present invention.

[0024] Indicated in the figure: 1. Power input interface; 2. Power conversion module; 21. Rectifier; 22. DC-DC converter; 3. Power storage module; 4. Power output interface; 5. Control module; 51. Microprocessor; 52. Sensor; 53. Driver; 6. Power conversion circuit board; 7. Battery equalizer; 8. Zener diode; 9. Electromagnetic interference filter; 91. Filter capacitor; 10. Energy storage inductor; 11. Thermistor; 12. Relay; 13. Resistor; 14. Cooling fan. DETAILED DESCRIPTION

[0025] To make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is a specific implementation of the present invention and is not limited to all embodiments.

[0026] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] Example 1: Please refer to Figure 1-Figure 5 , a power conversion and storage device of a battery module, comprising a power input interface 1, a power conversion module 2, a power storage module 3, a power output interface 4 and a control module 5; The power input interface 1 is used to receive input from an external power source, and the power input interface 1 is connected to the power storage module 3; the power conversion module 2 is connected to the power input interface 1, and is used to convert the input power into voltage and current stored in the battery; The power conversion module 2 includes a rectifier 21 and a DC-DC converter 22. The rectifier 21 is used to convert the AC power supply into a DC power supply, and the DC-DC converter 22 is used to convert the DC power supply into a voltage and current stored in the battery. The power storage module 3 is connected to the power conversion module 2 and is used to store the converted power; the power storage module 3 includes a plurality of battery units connected in series or in parallel; the power output interface 4 is connected to the power storage module 3 and is used to output the stored power to an external load; The control module 5 is respectively connected to the power conversion module 2, the power storage module 3 and the power output interface 4, and is used to control the operation of the entire device, including power conversion, battery charging and discharging management; the control module 5 includes a microprocessor 51, a sensor 52 and a driver 53; the microprocessor 51 is used to process various control signals and data, the sensor 52 is used to detect the voltage, current and temperature parameters of the power storage module 3, and the driver 53 is used to control the operation of the power conversion module 2 and the power output interface 4.

[0029] The microprocessor 51 is arranged on the power conversion circuit board 6 , and a battery equalizer 7 is arranged on the power conversion circuit board 6 . The battery equalizer 7 is connected to the voltage regulator diode 8 circuit.

[0030] The driver 53 is connected to the electromagnetic interference filter 9, and the electromagnetic interference filter 9 is connected to the energy storage inductor 10. The energy storage inductor 10 is connected to the thermistor 11, and the thermistor 11 is connected to the filter capacitor 91. A cooling fan 14 is provided on the side of the power conversion circuit board 6. The filter capacitor 91 is connected to the relay 12, and the relay 12 is connected to the resistor 13.

[0031] The working principle of the power conversion and storage device of the battery module is as follows: the external power supply inputs power through the power input interface 1, which is connected to the power storage module 3. The rectifier 21 in the power conversion module 2 converts the AC power into a DC power, and the DC-DC converter 22 converts the DC power into a voltage and current suitable for battery storage. Among them, the function of the rectifier 21 is to convert the AC power into a DC power, and the DC-DC converter 22 is responsible for adjusting the DC power to the voltage and current values ​​required by the battery.

[0032] The converted power is stored in the power storage module 3, which is composed of a plurality of battery cells connected in series or in parallel. The power storage module 3 is connected to the power output interface 4, and when power is needed for an external load, the stored power is output through the power output interface 4.

[0033] The control module 5 plays a key control role in the entire device. It is connected to the power conversion module 2, the power storage module 3 and the power output interface 4 respectively. The microprocessor 51 in the control module 5 is arranged on the power conversion circuit board 6 for processing various control signals and data. The sensor 52 detects the voltage, current and temperature parameters of the power storage module 3, and these parameter information is transmitted to the microprocessor 51 for processing. The driver 53 controls the operation of the power conversion module 2 and the power output interface 4 according to the instructions of the microprocessor 51. On the power conversion circuit board 6, a battery equalizer 7 is also arranged, which is connected to the voltage regulator diode 8 circuit to ensure the balance of power between battery cells and improve the service life and performance of the battery.

[0034] The driver 53 is connected to the electromagnetic interference filter 9 to reduce electromagnetic interference. The electromagnetic interference filter 9 is connected to the energy storage inductor 10, the energy storage inductor 10 is connected to the thermistor 11, and the thermistor 11 is connected to the filter capacitor 91. These components work together to filter and stabilize the power to improve the power quality. A cooling fan 14 is provided on the side of the power conversion circuit board 6 to dissipate the heat generated during the operation to ensure the normal operation of the device.

[0035] The filter capacitor 91 is connected to the relay 12, and the relay 12 is connected to the resistor 13, and they jointly participate in the control and regulation of electric power.

[0036] The power conversion and storage device of this battery module realizes the input, conversion, storage and output of power through the coordinated work of various modules. At the same time, the control module 5 accurately manages and controls the entire process to meet different power needs.

[0037] The working process of the power conversion storage device of the battery module is as follows: Power input: The external power source is connected to the device through the power input interface 1, and the power input interface 1 transmits the received power to the power conversion module 2.

[0038] Power Conversion: Rectification: The rectifier 21 in the power conversion module 2 converts the input AC power into DC power.

[0039] DCDC conversion: The rectified DC power supply is then converted into a voltage and current suitable for battery storage through a DCDC converter.

[0040] Battery charging: The converted electricity is transmitted to the power storage module 3, and the multiple battery cells connected in series or in parallel in the power storage module 3 are charged to store the electrical energy.

[0041] Battery monitoring: The sensor 52 in the control module 5 detects the voltage, current, and temperature parameters of the power storage module 3 in real time, and transmits these data to the microprocessor 51.

[0042] Control Management: The microprocessor 51 processes various control signals and data according to the data transmitted by the sensor 52, and manages power conversion, battery charging and discharging.

[0043] The battery equalizer 7 is connected to the voltage stabilizing diode 8 to ensure the balance of power between the battery cells.

[0044] Power output: When power is required for an external load, the electric energy in the power storage module 3 is output through the power output interface 4 .

[0045] The driver 53 controls the operation of the power output interface 4 according to the instruction of the microprocessor 51 .

[0046] The electromagnetic interference filter 9 reduces electromagnetic interference, and the energy storage inductor 10, thermistor 11, and filter capacitor 91 components filter and stabilize the output power.

[0047] The cooling fan 14 dissipates heat from the power conversion circuit board 6 to ensure normal operation of the device.

[0048] The filter capacitor 91 is connected to the resistor 13 via the relay 12 and participates in the control and regulation of the power output.

[0049] Embodiment 2: A storage method of a power conversion storage device of a battery module, comprising the following steps: Step 1. An external power source inputs power through a power input interface 1, and the power input interface 1 transmits the power to a power conversion module 2; a rectifier 21 in the power conversion module 2 converts the AC power into a DC power, and a DC-DC converter 22 converts the DC power into a voltage and current suitable for battery storage; Step 2. The converted electricity is stored in the power storage module 3, which is composed of a plurality of battery cells connected in series or in parallel; the sensor 52 in the control module 5 detects the voltage, current and temperature parameters of the power storage module 3 in real time, and transmits these parameters to the microprocessor 51; Step 3. The microprocessor 51 processes various control voltages and currents and manages battery charging according to the parameters detected by the sensor 52; The formula for the microprocessor 51 to process the power conversion storage voltage is: + ; in Is the time during the power conversion and storage process Voltage; is the initial storage voltage of power conversion storage; is the power storage value of the i-th harmonic component; is the phase of the i-th power conversion storage harmonic component; is the power conversion storage frequency; is the power conversion storage harmonic order; Step 4. During the battery charging process, the battery equalizer 7 on the power conversion circuit board 6 performs equalization management on the battery cells to ensure that the power of each battery cell remains consistent; the voltage regulator diode 8 circuit performs voltage regulation protection on the battery equalizer 7; when the stored power needs to be output to the external load, the power is transmitted to the power output interface 4 through the power storage module 3; The stored power output current is calculated as: * * Where: P is the power of the stored electricity output to the external load, V is the voltage of the stored electricity output to the external load, is the power factor of the stored power output to the external load, is the stored power frequency, is the fluctuation value of the i-th stored power phase component.

[0050] Step 5. The driver 53 in the control module 5 controls the operation of the power conversion module 2 and the power output interface 4; the electromagnetic interference filter 9 connected to the driver 53 filters the electromagnetic interference in the circuit; the filtered power is transmitted to the energy storage inductor 10, and the energy storage inductor 10 stores and releases the power; the energy storage inductor 10 is connected to the thermistor 11, and the thermistor 11 adjusts the circuit resistance according to the temperature change; The resistance adjustment formula is: + ; in, It's time Resistance; is the initial value of the resistor; It is The phase adjusted by a resistor; is the number of resistance adjustments; Step 6. The filter capacitor 91 further filters the power to improve the power quality; the filter capacitor 91 is connected to the relay 12, and the relay 12 controls the on and off of the circuit according to the control signal; the relay 12 is connected to the resistor 13, and the resistor 13 is used to limit the current and protect the circuit components.

[0051] The AC voltage of the external power supply input is 220V and the frequency is 50Hz. The rectifier 21 converts the 220V AC power supply into a 300V DC power supply; the DC-DC converter 22 converts the 300V DC power supply into a voltage stored in the battery.

[0052] The sensor 52 detects that the initial voltage of the power storage module 3 is 10V, the current is 2A, and the temperature is 25°C.

[0053] The parameter cut-off frequency of the electromagnetic interference filter 9 is 100 kHz.

[0054] The capacitance value of the filter capacitor 91 is 1000 μF.

[0055] Embodiment 3: In this embodiment, the power conversion storage device of the battery module operates according to the following parameters: the AC voltage of the external power supply input is 220V and the frequency is 50Hz. The rectifier 21 converts the 220V AC power supply into a 300V DC power supply, and the DC-DC converter 22 converts the 300V DC power supply into a voltage of 12V and a current of 5A stored in the battery.

[0056] The power storage module 3 is composed of 10 battery cells connected in series, and each battery cell has a rated voltage of 1.2V and a rated capacity of 2000mAh.

[0057] The sensor 52 detects that the initial voltage of the power storage module 3 is 10V, the current is 2A, and the temperature is 25° C. During the charging process, the sensor 52 monitors the voltage, current, and temperature changes of the power storage module 3 in real time.

[0058] The formula for the microprocessor 51 to process the power conversion storage voltage is: The formula for the microprocessor 51 to process the power conversion storage voltage is: + ; in Is the time during the power conversion and storage process Voltage; is the initial storage voltage of power conversion storage; is the power storage value of the i-th harmonic component; is the phase of the i-th power conversion storage harmonic component; is the power conversion storage frequency; is the power conversion storage harmonic order When the stored power needs to be output to an external load, assuming that the load power P=100W, the output voltage V=20V, the power factor \cos\theta=0.8, the power frequency f=50Hz, and the fluctuation value of the first stored power phase component is 0.1. Then the calculation formula for the stored power output current is: The calculation formula for the stored power output current is: * * Where: P is the power of the stored electricity output to the external load, V is the voltage of the stored electricity output to the external load, is the power factor of the stored power output to the external load, is the stored power frequency, is the fluctuation value of the i-th stored power phase component; The driver 53 in the control module 5 controls the operation of the power conversion module 2 and the power output interface 4. The electromagnetic interference filter 9 connected to the driver 53 has a parameter cutoff frequency of 100 kHz and performs filtering on the electromagnetic interference in the circuit.

[0059] The filtered power is transmitted to the energy storage inductor 10, the inductance of which is 10mH, to store and release the power. The energy storage inductor 10 is connected to the thermistor 11, the initial resistance value of the thermistor 11 is R_{0}=100\Omega, and the resistance adjustment formula is: + ; in, It's time Resistance; is the initial value of the resistor; It is The phase adjusted by a resistor; The capacitance value of the filter capacitor 91 is 1000μF, which further filters the power and improves the power quality. The filter capacitor 91 is connected to the relay 12, and the relay 12 controls the on and off of the circuit according to the control signal. The relay 12 is connected to the resistor 13, and the resistance value of the resistor 13 is 10\Omega, which is used to limit the current and protect the circuit components.

[0060] Through the implementation of the above specific parameter values, the power conversion storage device of the battery module can achieve efficient power conversion, storage and output, while effectively managing and protecting the battery, improving the performance and reliability of the device. It should be noted that the above parameter values ​​are only examples and can be adjusted and optimized according to specific needs in actual applications.

[0061] Experimental example Experimental purpose: To verify the performance and function of the power conversion storage device of the battery module.

[0062] Experimental equipment: Power conversion storage device for battery modules; AC power supply, output voltage is 220V, frequency is 50Hz; Electronic load, can set different load powers; Voltage and current tester, used to measure input and output voltage and current; The temperature sensor 52 is used to measure the temperature inside the power storage module 3 and the device.

[0063] Experimental steps: 1. Connect the AC power supply to the power input port 1 and make sure the connection is secure.

[0064] 2. Turn on the power conversion storage device of the battery module and observe whether the indicator light of the device is normally lit and whether the cooling fan 14 is operating normally.

[0065] 3. Use a voltage and current tester to measure the input voltage and current at the power input interface 1 and record the data. At this time, the input voltage should be 220V and the frequency should be 50Hz.

[0066] 4. Observe the working condition of the power conversion module 2, and confirm that the rectifier 21 converts the AC power into DC power, and the DC-DC converter 22 converts the DC power into a voltage and current suitable for battery storage. Use a voltage and current tester to measure the converted voltage and current and record the data. For example, the rectifier 21 converts the 220V AC power into a 300V DC power, and the DC-DC converter 22 converts the 300V DC power into a 12V battery storage voltage with a current of 5A.

[0067] 5. The power storage module 3 starts to store the converted power, and the voltage, current and temperature parameters of the power storage module 3 are monitored by the sensor 52. The voltage, current and temperature of the initial power storage module 3 are recorded. Assume that the initial voltage is 10V, the current is 2A, and the temperature is 25°C.

[0068] 6. Continue to operate the device for a period of time and observe the working condition of the battery equalizer 7 to ensure that the power of each battery cell remains consistent.

[0069] 7. After the power storage module 3 stores a certain amount of electricity, the electronic load is connected to the power output interface 4, and different load powers are set, such as 50W, 100W, and 150W.

[0070] 8. Use a voltage and current tester to measure the output voltage and current at the power output interface 4 and record the data. The stored power output current calculation formula is: * * Where: P is the power of the stored electricity output to the external load, V is the voltage of the stored electricity output to the external load, is the power factor of the stored power output to the external load, is the stored power frequency, is the fluctuation value of the i-th stored power phase component, and the output current is calculated and verified.

[0071] 9. During the experiment, the formula for resistance adjustment is: + ; in, It's time Resistance; is the initial value of the resistor; It is The phase adjusted by a resistor; is the number of resistance adjustments.

[0072] 10. After the experiment, turn off the AC power supply and electronic load, and organize the experimental data.

[0073] Experimental results: Through the analysis of experimental data, the following conclusions can be drawn: 1. The power input interface 1 can normally receive input from an external power source, and the power conversion module 2 can effectively convert the AC power source into a voltage and current suitable for battery storage.

[0074] 2. The power storage module 3 can successfully store the converted power, and the battery equalizer 7 can better maintain the power balance between the battery cells.

[0075] 3. The power output interface 4 can stably output power according to the requirements of the external load to meet different power requirements.

[0076] 4. The control module 5 can accurately control the operation of the entire device, the sensor 52 can accurately detect the parameters of the power storage module 3, and the driver 53 can effectively control the operation of the power conversion module 2 and the power output interface 4.

[0077] 5. The electromagnetic interference filter 9, the energy storage inductor 10, thermistor 11, the filter capacitor 91, the relay 12 and the resistor 13 components can work together to filter, stabilize and regulate the power to improve the power quality.

[0078] 6. The cooling fan 14 can dissipate the heat generated during the operation of the device in time to ensure the normal operation of the device The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A power conversion and storage device of a battery module, characterized in that: It comprises a power input interface (1), a power conversion module (2), a power storage module (3), a power output interface (4) and a control module (5); The power input interface (1) is used to receive input from an external power source, and the power input interface (1) is connected to the power storage module (3); the power conversion module (2) is connected to the power input interface (1) and is used to convert the input power into a voltage and current stored in a battery; The power conversion module (2) comprises a rectifier (21) and a DC-DC converter (22), wherein the rectifier (21) is used to convert an AC power supply into a DC power supply, and the DC-DC converter (22) is used to convert the DC power supply into a voltage and current stored in a battery; The power storage module (3) is connected to the power conversion module (2) and is used to store the converted power; the power storage module (3) comprises a plurality of battery units connected in series or in parallel; The power output interface (4) is connected to the power storage module (3) and is used to output the stored power to an external load; The control module (5) is respectively connected to the power conversion module (2), the power storage module (3) and the power output interface (4), and is used to control the operation of the entire device, including power conversion, battery charging and discharging management; the control module (5) comprises a microprocessor (51), a sensor (52) and a driver (53); the microprocessor (51) is used to process various control signals and data, the sensor (52) is used to detect the voltage, current and temperature parameters of the power storage module (3), and the driver (53) is used to control the operation of the power conversion module (2) and the power output interface (4).

2. The power conversion and storage device of the battery module according to claim 1, characterized in that: The microprocessor (51) is arranged on a power conversion circuit board (6), a battery equalizer (7) is arranged on the power conversion circuit board (6), and the battery equalizer (7) is connected to a voltage regulator diode (8) circuit.

3. The power conversion and storage device of the battery module according to claim 2, characterized in that: The driver (53) is connected to an electromagnetic interference filter (9), and the electromagnetic interference filter (9) is connected to an energy storage inductor (10).

4. The power conversion and storage device of the battery module according to claim 3, characterized in that: The energy storage inductor (10) is connected to a thermistor (11), the thermistor (11) is connected to a filter capacitor (91), and a cooling fan (14) is provided on the side of the power conversion circuit board (6).

5. The power conversion and storage device of the battery module according to claim 4, characterized in that: The filter capacitor (91) is connected to a relay (12), and the relay (12) is connected to a resistor (13).

6. A storage method for a power conversion storage device of a battery module, characterized in that: The following steps are involved: Step 1. An external power source inputs power through a power input interface (1), and the power input interface (1) transmits the power to a power conversion module (2); a rectifier (21) in the power conversion module (2) converts the AC power into a DC power, and a DC-DC converter (22) converts the DC power into a voltage and current suitable for battery storage; Step 2. The converted electricity is stored in an electricity storage module (3), which is composed of a plurality of battery cells connected in series or in parallel; a sensor (52) in the control module (5) detects voltage, current, and temperature parameters of the electricity storage module (3) in real time, and transmits these parameters to a microprocessor (51); Step 3. The microprocessor (51) processes various control voltages and currents and manages battery charging according to the parameters detected by the sensor (52); The formula for the microprocessor (51) to process the power conversion storage voltage is: + in Is the time during the power conversion and storage process Voltage; is the initial storage voltage of power conversion storage; is the power storage value of the i-th harmonic component; is the phase of the i-th power conversion storage harmonic component; is the power conversion storage frequency; is the power conversion storage harmonic order Step 4. During the battery charging process, the battery equalizer (7) on the power conversion circuit board (6) performs equalization management on the battery cells to ensure that the power of each battery cell remains consistent; the voltage regulator diode (8) circuit performs voltage regulation protection on the battery equalizer (7); when the stored power needs to be output to an external load, the power is transmitted to the power output interface (4) through the power storage module (3); The stored power output current is calculated as: * * Where: P is the power of the stored electricity output to the external load, V is the voltage of the stored electricity output to the external load, is the power factor of the stored power output to the external load, is the stored power frequency, is the fluctuation value of the i-th stored power phase component; Step 5. The driver (53) in the control module (5) controls the operation of the power conversion module (2) and the power output interface (4); the electromagnetic interference filter (9) connected to the driver (53) filters the electromagnetic interference in the circuit; the filtered power is transmitted to the energy storage inductor (10), and the energy storage inductor (10) stores and releases the power; the energy storage inductor (10) is connected to the thermistor (11), and the thermistor (11) adjusts the circuit resistance according to the temperature change; The resistance adjustment formula is: + ; in, It's time Resistance; is the initial value of the resistor; It is The phase adjusted by a resistor; is the number of resistance adjustments; Step 6. The filter capacitor (91) further filters the power to improve the power quality; the filter capacitor (91) is connected to the relay (12), and the relay (12) controls the on and off of the circuit according to the control signal; the relay (12) is connected to the resistor (13), and the resistor (13) is used to limit the current and protect the circuit components.

7. The storage method of the power conversion storage device of the battery module according to claim 6, characterized in that: The AC voltage of the external power supply input is 220V and the frequency is 50Hz. The rectifier (21) converts the 220V AC power supply into a 300V DC power supply. The DC-DC converter (22) converts the 300V DC power supply into a voltage stored in the battery.

8. The storage method of the power conversion storage device of the battery module according to claim 7, characterized in that: The sensor (52) detects that the initial voltage of the power storage module (3) is 10V, the current is 2A, and the temperature is 25°C.

9. The storage method of the power conversion storage device of the battery module according to claim 8, characterized in that: The parameter cut-off frequency of the electromagnetic interference filter (9) is 100kHz.

10. The storage method of the power conversion storage device of the battery module according to claim 9, characterized in that: The capacitance value of the filter capacitor (91) is 1000 μF.

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